阅读说明：本技术 新能源汽车用线缆的制备方法 (Preparation method of cable for new energy automobile ) 是由 吴彩琴 刘军波 张学武 张祖新 丁乾坤 武佳佳 于 2020-12-30 设计创作，主要内容包括：本发明涉及一种新能源汽车用线缆的制备方法,包括：步骤一、将线芯和挤塑机分别预热,挤塑机将物料进行塑化；步骤二、在牵引机的作用下,挤塑机将塑化后的物料通过模具挤出包裹在线芯表面；步骤三、经挤塑机注塑后的线缆进入水冷单元进行冷却降温。通过获取物料的密度、熔点、体积电阻率、抗张强度、伸长率得出物料参数值,对加热器的工作参数进行确定,根据螺杆的长度、直径、长径比和压缩比的参数确定出螺杆参考值,并根据螺杆参考值与加热器的工作参数对螺杆的转速进行确定,并根据实际生产出的线缆的厚度对螺杆的转速和加热器进行调整,有效提高新能源汽车用线缆的制备效率和提高线缆的质量,从而延长线缆的使用寿命。(The invention relates to a preparation method of a cable for a new energy automobile, which comprises the following steps: step one, respectively preheating a wire core and a plastic extruding machine, and plasticizing materials by the plastic extruding machine; extruding and wrapping the plasticized material on the surface of the wire core by an extruding machine through a die under the action of a traction machine; and step three, the cable subjected to injection molding by the plastic extruding machine enters a water cooling unit to be cooled. The method comprises the steps of obtaining material parameter values through obtaining the density, the melting point, the volume resistivity, the tensile strength and the elongation of materials, determining working parameters of a heater, determining a screw reference value according to the length, the diameter, the length-diameter ratio and the compression ratio of the screw, determining the rotating speed of the screw according to the screw reference value and the working parameters of the heater, adjusting the rotating speed of the screw and the heater according to the thickness of the actually produced cable, effectively improving the preparation efficiency of the cable for the new energy automobile and improving the quality of the cable, and prolonging the service life of the cable.)

1. A preparation method of a cable for a new energy automobile is characterized by comprising the following steps:

step one, respectively preheating a wire core and an extruding machine, and plasticizing materials by the extruding machine;

secondly, under the action of a traction machine, the plastic extruding machine extrudes and wraps the plasticized material on the surface of the wire core through a die;

thirdly, the cable subjected to injection molding by the plastic extruding machine enters a water cooling unit to be cooled;

before the extruder works, detecting and analyzing the density, melting point, volume resistivity, tensile strength and elongation of a material to be injected, so as to obtain the density, melting point, volume resistivity, tensile strength and elongation of the material and transmit data to a central control unit arranged in the extruder, wherein the central control unit establishes a material parameter matrix A (a, b, c, d and e) for the material to be injected, wherein a represents the density of the material, b represents the melting point of the material, c represents the volume resistivity of the material, d represents the tensile strength of the material, and e represents the elongation of the material;

the central control unit determines material parameter values according to density, melting point, volume resistivity, tensile strength and elongation in the material parameter matrix, determines working parameters of a heater arranged on a screw according to the determined material parameter values, calculates and determines a screw reference value of the current extruding machine according to the length, diameter, length-diameter ratio and compression ratio of the screw in the extruding machine, determines the rotating speed of the screw according to the determined screw reference value and the working parameters of the heater, measures the prepared cable and obtains the thickness of the cable when the extruding machine runs to a first stage cable shaping according to the determined working parameters, compares the difference value between the thickness of the cable and the preset thickness with a threshold value, and if the thickness of the actually prepared cable is smaller than the preset thickness, the central control unit adjusts the rotation speed of the screw rod in an accelerated manner, if the thickness of the actually prepared cable is larger than the preset thickness, the central control unit adjusts the rotation speed of the screw rod in a decelerated manner, if the thickness of the actually prepared cable is equal to the preset thickness, the central control unit does not adjust the rotation speed of the screw rod, if the central control unit adjusts the rotation speed of the screw rod, the central control unit receives detection data of the glue output amount of the plastic extruding machine from a flow detector arranged at an outlet of the plastic extruding machine, when the actual glue output amount of the plastic extruding machine is smaller than the preset glue output amount, the central control unit adjusts the working parameters of the heater to be working parameters after the preset sequence of the current working parameters, and when the actual glue output amount of the plastic extruding machine is larger than the preset glue output amount, the central control unit adjusts the working parameters of the heater to be working parameters before the preset sequence of the current working parameters, and if the central control unit does not adjust the rotating speed of the screw, the central control unit does not adjust the working parameters of the heater.

2. The method for manufacturing the cable for the new energy automobile according to claim 1, wherein the central control unit determines material parameter values according to information of material, melting point, volume resistivity, tensile strength and elongation of a material to be injection-molded in the material parameter matrix A,

z＝a/a0+b/b0+c/c0+d/d0+e/e0

wherein z represents a parameter value of the material, a represents a density of the material, a0 represents a preset density of the material, b represents a melting point of the material, b0 represents a preset melting point of the material, c represents a volume resistivity of the material, c0 represents a preset volume resistivity of the material, d represents a tensile strength of the material, d0 represents a preset tensile strength of the material, e represents an elongation of the material, and e0 represents a preset elongation of the material.

3. The preparation method of the cable for the new energy automobile according to claim 2, wherein the screw comprises a material receiving screw region, the material receiving screw region is a region where the material is conveyed forward under the action of a rotating screw after entering the screw from a hopper, the screw region is sequentially divided into a first screw region, a second screw region, a third screw region, a fourth screw region and a fifth screw region after passing through the material receiving screw region, the material is compacted and plasticized one by one, the first screw region is provided with a first heater, the second screw region is provided with a second heater, the third screw region is provided with a third heater, the fourth screw region is provided with a fourth heater, and the fifth screw region is provided with a fifth heater;

the central control unit is respectively connected with the first heater, the second heater, the third heater, the fourth heater and the fifth heater and respectively adjusts the working parameters of the first heater, the second heater, the third heater, the fourth heater and the fifth heater;

an operating matrix group WJ (WJ1, WJ2 and WJ3 … WJn) of the heater is preset in the central control unit, wherein WJ1 represents a first preset operating parameter of the heater, WJ2 represents a second preset operating parameter of the heater, WJ3 represents a third preset operating parameter of the heater, and WJn represents an nth preset operating parameter of the heater;

an operation matrix WJi for the i-th heater (WJi1, WJi2, WJi3, WJi4, WJi5), where WJi1 denotes a preset heating temperature of the first heater, WJi2 denotes a preset heating temperature of the second heater, WJi3 denotes a preset heating temperature of the third heater, WJi4 denotes a preset heating temperature of the fourth heater, WJi5 denotes a preset heating temperature of the fifth heater, WJi1 < WJi2 < WJi3 < WJi4 < WJi 5.

4. The preparation method of the cable for the new energy automobile as claimed in claim 3, wherein a material parameter matrix Z (Z1, Z2, Z3 … Zn) is preset in the central control unit, wherein Z1 represents a first preset material parameter value, Z2 represents a second preset material parameter value, Z3 represents a third preset material parameter value, and Zn represents an nth preset material parameter value;

the central control unit determines the working parameters of the heater according to the material parameter values of the materials to be injected,

if Z is less than or equal to Z1, the central control unit selects the working matrix group of the heater as WJ1, selects WJ11 from WJ1 as the heating temperature of the first heater, selects WJ12 as the heating temperature of the second heater, selects WJ13 as the heating temperature of the third heater, selects WJ14 as the heating temperature of the fourth heater, and selects WJ15 as the heating temperature of the fifth heater;

if Z1 is larger than or equal to Z2, the central control unit selects the working matrix group of the heater as WJ2, selects WJ21 from WJ2 as the heating temperature of the first heater, selects WJ22 as the heating temperature of the second heater, selects WJ23 as the heating temperature of the third heater, selects WJ24 as the heating temperature of the fourth heater, and selects WJ25 as the heating temperature of the fifth heater;

if Z2 is larger than or equal to Z3, the central control unit selects the working matrix group of the heater as WJ3, selects WJ31 from WJ3 as the heating temperature of the first heater, selects WJ32 as the heating temperature of the second heater, selects WJ33 as the heating temperature of the third heater, selects WJ34 as the heating temperature of the fourth heater, and selects WJ35 as the heating temperature of the fifth heater;

if Z (n-1) < Z ≦ Zn, the central control unit selects WJN as the working matrix group of the heater, selects WJN1 from WJN as the heating temperature of the first heater, selects WJN2 as the heating temperature of the second heater, selects WJN3 as the heating temperature of the third heater, selects WJN4 as the heating temperature of the fourth heater, and selects WJN5 as the heating temperature of the fifth heater.

5. The preparation method of the cable for the new energy automobile according to claim 4, wherein the central control unit calculates the length, diameter, length-diameter ratio and compression ratio of the screw to obtain a screw reference value y,

y＝0.5×L/L0+0.4×D/D0+0.3×(L/D)/(L0/D0)+0.6×S/S0

where y denotes a screw reference value, L denotes a length of the screw, L0 denotes a preset length of the screw, D denotes a diameter of the screw, D0 denotes a preset diameter of the screw, S denotes a compression ratio of the screw, and S0 denotes a preset compression ratio of the screw.

6. The preparation method of the cable for the new energy automobile according to claim 5, wherein a screw reference matrix Y and a rotation speed matrix V of a screw are preset in the central control unit;

for the screw reference matrix Y (Y1, Y2, Y3 … Yn), wherein Y1 denotes a first preset screw reference value, Y2 denotes a second preset screw reference value, Y3 denotes a third preset screw reference value, Yn denotes an nth preset screw reference value;

a matrix V (V1, V2, V3 … Vn) is referenced to the screw, wherein V1 represents a first preset rotation speed of the screw, V2 represents a second preset rotation speed of the screw, V3 represents a third preset rotation speed of the screw, and Vn represents an nth preset rotation speed of the screw;

the central control unit determines the rotation speed of the screw according to the screw reference value y of the extruder,

if Y is less than or equal to Y1 and the working matrix group of the heater is WJ1, the central control unit determines that the rotating speed of the screw is V1;

if Y is greater than Y1 and less than or equal to Y2 and the working matrix group of the heater is WJ2, the central control unit determines that the rotating speed of the screw is V4;

if Y is greater than Y2 and less than or equal to Y3 and the working matrix group of the heater is WJ3, the central control unit determines that the rotating speed of the screw is V5;

if Y (n-1) < Y is less than or equal to Yn and the working matrix group of the heater is WJn, the central control unit determines that the rotating speed of the screw is Vn;

if Y (i-1) < Y is less than or equal to Yi, and the working matrix group of the heater is WJj, the central control unit determines the rotating speed of the screw to be V (i + j-1), and if the determined rotating speed of the screw is V (i + j-1) > Vn, the rotating speed of the screw is Vn.

7. The method for manufacturing a cable for a new energy automobile according to claim 6, wherein when the first-stage manufacturing of the cable is completed, the manufactured cable is measured to obtain a thickness H of the cable, a first thickness threshold of the thickness of the cable is set to be H1, a second thickness threshold is set to be H2, and a preset thickness is set to be H0, the central control unit adjusts a rotation speed Vi of the screw when the thickness H of the actually manufactured cable is less than the preset thickness H0,

if H0-H is not more than H1, the rotation speed of the adjusting screw of the central control unit is V (i + 1);

if H1 is more than H0-H is less than or equal to H2, the rotation speed of the adjusting screw rod of the central control unit is V (i + 2);

if H0-H is more than H2, the central control unit judges the extruder to be in fault;

when the thickness of the cable prepared in real time is smaller than the preset thickness, the glue output amount of the extruding machine is small, and the central control unit adjusts the rotating speed of the extruding machine.

8. The method for preparing the cable for the new energy automobile according to claim 7, wherein the central control unit adjusts a rotation speed Vi of the screw when a thickness H of the actually prepared cable is greater than a preset thickness H0,

if H-H0 is not more than H1, the rotation speed of the adjusting screw of the central control unit is V (i-1);

if H1 is more than H-H0 and less than or equal to H2, the rotation speed of the adjusting screw rod of the central control unit is V (i-2);

if H-H0 is more than H2, the central control unit judges the extruder to be in fault;

when the thickness H of the actually prepared cable is equal to the preset thickness H0, the rotation speed Vi of the screw is not adjusted by the central control unit;

when the thickness of the cable prepared in real time is larger than the preset thickness, the glue output amount of the extruding machine is large, and the central control unit adjusts the rotating speed of the extruding machine.

9. The method for manufacturing a cable for a new energy vehicle according to claim 8, wherein if the central control unit needs to adjust the rotation speed of the screw, the central control unit receives the detection data of the glue output amount of the extruder from the flow detector disposed at the outlet of the extruder, sets the glue output amount of the extruder as Q, the preset glue output amount as Q0, the first glue output threshold as Q1, and the second glue output threshold as Q2, and adjusts the operating parameters of the heater according to the difference between the glue output amount Q of the extruder and the preset glue output amount Q0 when the actual glue output amount Q of the extruder is less than the preset glue output amount,

if Q0-Q is less than or equal to Q1, the central control unit adjusts the working parameter of the heater to be WJ (i + 1);

if Q1 is not less than Q0-Q is not less than Q2, the central control unit adjusts the working parameter of the heater to be WJ (i + 2);

if Q0-Q > Q2, the central control unit judges the extruder to be in fault.

10. The method for preparing the cable for the new energy automobile according to claim 9, wherein when an actual glue yield Q of the extruder is greater than a preset glue yield, the central control unit adjusts an operating parameter of the heater according to a difference between the glue yield Q of the extruder and a preset glue yield Q0,

if Q-Q0 is not more than Q1, the central control unit adjusts the working parameter of the heater to be WJ (i-1);

if Q1 is not less than Q-Q0 is not less than Q2, the central control unit adjusts the working parameter of the heater to be WJ (i-2);

if Q-Q0 is more than Q2, the central control unit judges the extruder to be in fault;

if Q is Q0, the central control unit does not adjust the working parameters of the heater.

Technical Field

The invention relates to the technical field of cables, in particular to a preparation method of a cable for a new energy automobile.

Background

The wire and cable is used for transmitting electromagnetic energy, information and wire products for realizing electromagnetic energy conversion. A wire cable in a broad sense, also referred to as a cable for short, refers to an insulated cable, which can be defined as: an aggregate consisting of; one or more insulated wire cores, and their respective possible coatings, total protective layers and outer jackets, the cable may also have additional conductors without insulation.

However, when the cable is actually used, the cable is applied to a new energy passenger car, and the passenger car can encounter a plurality of complex road conditions and environmental factors such as accumulated water, road surface broken stones, acid-base solution environment of a battery and the like in the driving process, so that the cable is easily broken by the broken stones or corroded by the acid-base solution and the like, and the service life of the cable is short.

In the prior art, a preparation method for intelligently adjusting preparation parameters in the preparation process so as to improve the quality of the cable and prolong the service life of the cable is still lacked.

Disclosure of Invention

Therefore, the invention provides a preparation method of a cable for a new energy automobile, which is used for overcoming the problem that intelligent adjustment on preparation parameters in the preparation process is lacked in the prior art.

In order to achieve the above object, the present invention provides a method for manufacturing a cable for a new energy automobile, including:

step one, respectively preheating a wire core and an extruding machine, and plasticizing materials by the extruding machine;

secondly, under the action of a traction machine, the plastic extruding machine extrudes and wraps the plasticized material on the surface of the wire core through a die;

thirdly, the cable subjected to injection molding by the plastic extruding machine enters a water cooling unit to be cooled;

before the extruder works, detecting and analyzing the density, melting point, volume resistivity, tensile strength and elongation of a material to be injected, so as to obtain the density, melting point, volume resistivity, tensile strength and elongation of the material and transmit data to a central control unit arranged in the extruder, wherein the central control unit establishes a material parameter matrix A (a, b, c, d and e) for the material to be injected, wherein a represents the density of the material, b represents the melting point of the material, c represents the volume resistivity of the material, d represents the tensile strength of the material, and e represents the elongation of the material;

the central control unit determines material parameter values according to density, melting point, volume resistivity, tensile strength and elongation in the material parameter matrix, determines working parameters of a heater arranged on a screw according to the determined material parameter values, calculates and determines a screw reference value of the current extruding machine according to the length, diameter, length-diameter ratio and compression ratio of the screw in the extruding machine, determines the rotating speed of the screw according to the determined screw reference value and the working parameters of the heater, measures the prepared cable and obtains the thickness of the cable when the extruding machine runs to a first stage cable shaping according to the determined working parameters, compares the difference value between the thickness of the cable and the preset thickness with a threshold value, and if the thickness of the actually prepared cable is smaller than the preset thickness, the central control unit adjusts the rotation speed of the screw rod in an accelerated manner, if the thickness of the actually prepared cable is larger than the preset thickness, the central control unit adjusts the rotation speed of the screw rod in a decelerated manner, if the thickness of the actually prepared cable is equal to the preset thickness, the central control unit does not adjust the rotation speed of the screw rod, if the central control unit adjusts the rotation speed of the screw rod, the central control unit receives detection data of the glue output amount of the plastic extruding machine from a flow detector arranged at an outlet of the plastic extruding machine, when the actual glue output amount of the plastic extruding machine is smaller than the preset glue output amount, the central control unit adjusts the working parameters of the heater to be working parameters after the preset sequence of the current working parameters, and when the actual glue output amount of the plastic extruding machine is larger than the preset glue output amount, the central control unit adjusts the working parameters of the heater to be working parameters before the preset sequence of the current working parameters, and if the central control unit does not adjust the rotating speed of the screw, the central control unit does not adjust the working parameters of the heater.

Further, the central control unit determines material parameter values according to the information of the material, the melting point, the volume resistivity, the tensile strength and the elongation of the material to be injection-molded in the material parameter matrix A,

z＝a/a0+b/b0+c/c0+d/d0+e/e0

wherein z represents a parameter value of the material, a represents a density of the material, a0 represents a preset density of the material, b represents a melting point of the material, b0 represents a preset melting point of the material, c represents a volume resistivity of the material, c0 represents a preset volume resistivity of the material, d represents a tensile strength of the material, d0 represents a preset tensile strength of the material, e represents an elongation of the material, and e0 represents a preset elongation of the material.

The screw rod comprises a material receiving screw rod area, the material receiving screw rod area is an area where materials are conveyed forwards under the action of a rotating screw rod after entering the screw rod from a hopper, the screw rod area is sequentially divided into a first screw rod area, a second screw rod area, a third screw rod area, a fourth screw rod area and a fifth screw rod area after passing through the material receiving screw rod area, the materials are compacted and plasticized one by one, the first screw rod area is provided with a first heater, the second screw rod area is provided with a second heater, the third screw rod area is provided with a third heater, the fourth screw rod area is provided with a fourth heater, and the fifth screw rod area is provided with a fifth heater;

the central control unit is respectively connected with the first heater, the second heater, the third heater, the fourth heater and the fifth heater and respectively adjusts the working parameters of the first heater, the second heater, the third heater, the fourth heater and the fifth heater;

an operating matrix group WJ (WJ1, WJ2 and WJ3 … WJn) of the heater is preset in the central control unit, wherein WJ1 represents a first preset operating parameter of the heater, WJ2 represents a second preset operating parameter of the heater, WJ3 represents a third preset operating parameter of the heater, and WJn represents an nth preset operating parameter of the heater;

an operation matrix WJi for the i-th heater (WJi1, WJi2, WJi3, WJi4, WJi5), where WJi1 denotes a preset heating temperature of the first heater, WJi2 denotes a preset heating temperature of the second heater, WJi3 denotes a preset heating temperature of the third heater, WJi4 denotes a preset heating temperature of the fourth heater, WJi5 denotes a preset heating temperature of the fifth heater, WJi1 < WJi2 < WJi3 < WJi4 < WJi 5.

Furthermore, a material parameter matrix Z (Z1, Z2, Z3 … Zn) is preset in the central control unit, wherein Z1 represents a first preset material parameter value, Z2 represents a second preset material parameter value, Z3 represents a third preset material parameter value, and Zn represents an nth preset material parameter value;

the central control unit determines the working parameters of the heater according to the material parameter values of the materials to be injected,

if Z is less than or equal to Z1, the central control unit selects the working matrix group of the heater as WJ1, selects WJ11 from WJ1 as the heating temperature of the first heater, selects WJ12 as the heating temperature of the second heater, selects WJ13 as the heating temperature of the third heater, selects WJ14 as the heating temperature of the fourth heater, and selects WJ15 as the heating temperature of the fifth heater;

if Z1 is larger than or equal to Z2, the central control unit selects the working matrix group of the heater as WJ2, selects WJ21 from WJ2 as the heating temperature of the first heater, selects WJ22 as the heating temperature of the second heater, selects WJ23 as the heating temperature of the third heater, selects WJ24 as the heating temperature of the fourth heater, and selects WJ25 as the heating temperature of the fifth heater;

if Z2 is larger than or equal to Z3, the central control unit selects the working matrix group of the heater as WJ3, selects WJ31 from WJ3 as the heating temperature of the first heater, selects WJ32 as the heating temperature of the second heater, selects WJ33 as the heating temperature of the third heater, selects WJ34 as the heating temperature of the fourth heater, and selects WJ35 as the heating temperature of the fifth heater;

if Z (n-1) < Z ≦ Zn, the central control unit selects WJN as the working matrix group of the heater, selects WJN1 from WJN as the heating temperature of the first heater, selects WJN2 as the heating temperature of the second heater, selects WJN3 as the heating temperature of the third heater, selects WJN4 as the heating temperature of the fourth heater, and selects WJN5 as the heating temperature of the fifth heater.

Further, the central control unit calculates the length, diameter, length-diameter ratio and compression ratio of the screw to obtain a screw reference value y,

y＝0.5×L/L0+0.4×D/D0+0.3×(L/D)/(L0/D0)+0.6×S/S0

where y denotes a screw reference value, L denotes a length of the screw, L0 denotes a preset length of the screw, D denotes a diameter of the screw, D0 denotes a preset diameter of the screw, S denotes a compression ratio of the screw, and S0 denotes a preset compression ratio of the screw.

Further, a screw reference matrix Y and a rotation speed matrix V of the screw are preset in the central control unit;

for the screw reference matrix Y (Y1, Y2, Y3 … Yn), wherein Y1 denotes a first preset screw reference value, Y2 denotes a second preset screw reference value, Y3 denotes a third preset screw reference value, Yn denotes an nth preset screw reference value;

a matrix V (V1, V2, V3 … Vn) is referenced to the screw, wherein V1 represents a first preset rotation speed of the screw, V2 represents a second preset rotation speed of the screw, V3 represents a third preset rotation speed of the screw, and Vn represents an nth preset rotation speed of the screw;

the central control unit determines the rotation speed of the screw according to the screw reference value y of the extruder,

if Y is less than or equal to Y1 and the working matrix group of the heater is WJ1, the central control unit determines that the rotating speed of the screw is V1;

if Y is greater than Y1 and less than or equal to Y2 and the working matrix group of the heater is WJ2, the central control unit determines that the rotating speed of the screw is V4;

if Y is greater than Y2 and less than or equal to Y3 and the working matrix group of the heater is WJ3, the central control unit determines that the rotating speed of the screw is V5;

if Y (n-1) < Y is less than or equal to Yn and the working matrix group of the heater is WJn, the central control unit determines that the rotating speed of the screw is Vn;

if Y (i-1) < Y is less than or equal to Yi, and the working matrix group of the heater is WJj, the central control unit determines the rotating speed of the screw to be V (i + j-1), and if the determined rotating speed of the screw is V (i + j-1) > Vn, the rotating speed of the screw is Vn.

Further, when the first-stage preparation of the cable is completed, the prepared cable is measured, the thickness H of the cable is obtained, a first thickness threshold of the thickness of the cable is set to be H1, a second thickness threshold is set to be H2, and the preset thickness is set to be H0, when the thickness H of the actually prepared cable is smaller than the preset thickness H0, the central control unit adjusts the rotating speed Vi of the screw rod,

if H0-H is not more than H1, the rotation speed of the adjusting screw of the central control unit is V (i + 1);

if H1 is more than H0-H is less than or equal to H2, the rotation speed of the adjusting screw rod of the central control unit is V (i + 2);

if H0-H is more than H2, the central control unit judges the extruder to be in fault;

when the thickness of the cable prepared in real time is smaller than the preset thickness, the glue output amount of the extruding machine is small, and the central control unit adjusts the rotating speed of the extruding machine.

Further, when the thickness H of the actually prepared cable is larger than the preset thickness H0, the central control unit adjusts the rotating speed Vi of the screw,

if H-H0 is not more than H1, the rotation speed of the adjusting screw of the central control unit is V (i-1);

if H1 is more than H-H0 and less than or equal to H2, the rotation speed of the adjusting screw rod of the central control unit is V (i-2);

if H-H0 is more than H2, the central control unit judges the extruder to be in fault;

when the thickness H of the actually prepared cable is equal to the preset thickness H0, the rotation speed Vi of the screw is not adjusted by the central control unit;

when the thickness of the cable prepared in real time is larger than the preset thickness, the glue output amount of the extruding machine is large, and the central control unit adjusts the rotating speed of the extruding machine.

Further, if the central control unit needs to adjust the rotation speed of the screw, the central control unit receives detection data of a flow detector arranged at an outlet of the extruding machine on the glue output amount of the extruding machine, sets the glue output amount of the extruding machine to be Q, the preset glue output amount to be Q0, the first glue output amount threshold value to be Q1 and the second glue output amount threshold value to be Q2, when the actual glue output amount Q of the extruding machine is smaller than the preset glue output amount, the central control unit adjusts the working parameters of the heater according to the difference value between the glue output amount Q of the extruding machine and the preset glue output amount Q0,

if Q0-Q is less than or equal to Q1, the central control unit adjusts the working parameter of the heater to be WJ (i + 1);

if Q1 is not less than Q0-Q is not less than Q2, the central control unit adjusts the working parameter of the heater to be WJ (i + 2);

if Q0-Q > Q2, the central control unit judges the extruder to be in fault.

Further, when the actual glue output Q of the extruder is greater than the preset glue output, the central control unit adjusts the working parameters of the heater according to the difference between the glue output Q of the extruder and the preset glue output Q0,

if Q-Q0 is not more than Q1, the central control unit adjusts the working parameter of the heater to be WJ (i-1);

if Q1 is not less than Q-Q0 is not less than Q2, the central control unit adjusts the working parameter of the heater to be WJ (i-2);

if Q-Q0 is more than Q2, the central control unit judges the extruder to be in fault;

if Q is Q0, the central control unit does not adjust the working parameters of the heater.

Compared with the prior art, the preparation method of the cable for the new energy automobile has the advantages that material parameter values are determined by obtaining the density, the melting point, the volume resistivity, the tensile strength and the elongation rate in a material parameter matrix, the material parameter values determined by fully considering the material attributes are determined, the working parameters of the heater are determined according to the determined material parameter values, the central control unit determines the screw reference value according to the length, the diameter, the length-diameter ratio and the compression ratio of the screw, determines the rotating speed of the screw according to the screw reference value and the working parameters of the heater, preliminarily determines the working parameters of the heater and the screw of the extruder by fully combining the material attributes and the performance of the extruder, and adjusts the rotating speed of the screw according to the thickness of the actually produced cable, if the rotating speed of the screw needs to be adjusted, the central control unit compares the glue output amount of the plastic extruding machine with the preset glue output amount at the same time, so that the working parameters of the heater are adjusted, parameters in the actual preparation process are adjusted, the preparation efficiency of the cable for the new energy automobile is effectively improved, the quality of the cable is improved, and the service life of the cable is prolonged.

Furthermore, the invention determines the material parameter values through the information of the material, the melting point, the volume resistivity, the tensile strength and the elongation rate of the material, determines the parameter values by adopting the attribute values of the material, fully considers the characteristics of the material, reduces the error influence of individual attribute values by utilizing a method of comparing with preset values, improves the accuracy of data, and further improves the accurate adjustment of the parameters in the preparation process.

Furthermore, the screw rod is partitioned, the temperatures of different areas are set and controlled differently, the temperatures are changed from low to high, and the temperature and the property of the material have certain relevance, so that the preparation production process of the screw rod is more consistent with the property of the material, and the preparation efficiency is improved.

Furthermore, the working parameters of the heater are determined according to the material parameter values of the materials to be injection-molded, the temperature of the corresponding area of the screw is correspondingly set according to the properties of the materials, the heating temperature of the heater is basically consistent with the melting process of the materials, the materials are gradually melted, the melting degree of the materials is improved, the possibility of existence of particles is reduced, the preparation efficiency is further improved, and the quality of the cable is improved.

Furthermore, the method calculates the length, the diameter, the length-diameter ratio and the compression ratio of the screw to obtain a screw reference value, fully considers the influence of the performance of the screw on the preparation process, combines and determines the rotating speed of the screw, the working parameters of the heater and the screw reference value, considers the difference of performance values of different screws and the difference of melting capacities of materials, correlates the rotating speed of the screw with the materials, further improves the preparation efficiency, and further improves the quality of cables.

Further, the thickness of the prepared cable is detected, the thickness can be an average value of a section of cable or the thickness of the thinnest place of the section of cable, and the speed of the screw rod is adjusted by comparing the thickness of the cable with the preset thickness so as to adjust the preparation quality when the cables of the same type are prepared, and further improve the quality of the cable.

Furthermore, the invention compares the actual glue output amount of the plastic extruding machine with the preset glue output amount under the condition that the speed of the screw needs to be adjusted, so as to adjust the temperature of the heater, and adjusts the preparation process from two aspects of the rotating speed of the heater and the rotating speed of the screw, so that the prepared cable meets the preset requirement, and the quality of the cable is improved.

Drawings

Fig. 1 is a flowchart of a method for manufacturing a cable for a new energy vehicle according to an embodiment of the present invention;

fig. 2 is a schematic structural diagram of a manufacturing apparatus of a cable for a new energy automobile according to an embodiment of the present invention.

Detailed Description

In order that the objects and advantages of the invention will be more clearly understood, the invention is further described below with reference to examples; it should be understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention.

Preferred embodiments of the present invention are described below with reference to the accompanying drawings. It should be understood by those skilled in the art that these embodiments are only for explaining the technical principle of the present invention, and do not limit the scope of the present invention.

It should be noted that in the description of the present invention, the terms of direction or positional relationship indicated by the terms "upper", "lower", "left", "right", "inner", "outer", etc. are based on the directions or positional relationships shown in the drawings, which are only for convenience of description, and do not indicate or imply that the device or element must have a specific orientation, be constructed in a specific orientation, and be operated, and thus, should not be construed as limiting the present invention.

Furthermore, it should be noted that, in the description of the present invention, unless otherwise explicitly specified or limited, the terms "mounted," "connected," and "connected" are to be construed broadly, and may be, for example, fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meanings of the above terms in the present invention can be understood by those skilled in the art according to specific situations.

Referring to fig. 1, the present invention provides a method for manufacturing a cable for a new energy vehicle, including:

step one, respectively preheating a wire core and an extruding machine, and plasticizing materials by the extruding machine;

secondly, under the action of a traction machine, the plastic extruding machine extrudes and wraps the plasticized material on the surface of the wire core through a die 6;

thirdly, the cable subjected to injection molding by the plastic extruding machine enters a water cooling unit to be cooled;

before the extruder works, detecting and analyzing the density, melting point, volume resistivity, tensile strength and elongation of the material to be injected, acquiring the density, melting point, volume resistivity, tensile strength and elongation of the material and transmitting the data to a central control unit arranged in the extruder, wherein the central control unit establishes a material parameter matrix A (a, b, c, d, e) for the material to be injected, wherein a represents the density of the material, b represents the melting point of the material, c represents the volume resistivity of the material, d represents the volume resistivity of the materialThe tensile strength of the material is shown, and e the elongation of the material. The density, melting point, volume resistivity, tensile strength and elongation of the material are measured in advance, for example, in this embodiment, the density of polyvinyl chloride is 1.38g/cm³The melting point is 185-205 ℃, the volume resistivity is 1010-1012 omega-m, and the tensile strength is 12.5N/mm²The elongation was 150%. The present invention is not limited to specific measurement methods and measurement standards, and is implemented as the standard.

Specifically, in the embodiment of the present invention, the central control unit determines material parameter values according to density, melting point, volume resistivity, tensile strength, and elongation in the material parameter matrix, and determines working parameters of the heater 3 disposed on the screw 5 according to the determined material parameter values, the central control unit calculates and determines a reference value of the screw 5 of the present extruder according to the length, diameter, length-diameter ratio, and compression ratio of the screw 5 in the extruder, determines the rotation speed of the screw 5 according to the determined reference value of the screw 5 and the working parameters of the heater 3, measures the prepared cable and obtains the thickness of the cable when the extruder is operated to the first stage of cable shaping according to the determined working parameters, and the central control unit compares the difference between the thickness of the cable and a preset thickness with a threshold value, if the thickness of the actually prepared cable is smaller than the preset thickness, the central control unit adjusts the rotating speed of the screw rod 5 in an accelerated manner, if the thickness of the actually prepared cable is larger than the preset thickness, the central control unit adjusts the rotating speed of the screw rod 5 in a slowed manner, if the thickness of the actually prepared cable is equal to the preset thickness, the central control unit does not adjust the rotating speed of the screw rod 5, if the central control unit adjusts the rotating speed of the screw rod 5, the central control unit receives detection data of the glue output amount of the extruding machine from a flow detector arranged at the outlet of the extruding machine, if the actual glue output amount of the extruding machine is smaller than the preset glue output amount, the central control unit adjusts the working parameters of the heater 3 to be the working parameters after the preset sequence of the current working parameters, and if the actual glue output of the extruding machine is larger than the preset glue output, the central control unit adjusts the working parameters of the heater 3 to be the working parameters before the preset sequence of the current working parameters, and if the central control unit does not adjust the rotating speed of the screw 5, the central control unit does not adjust the working parameters of the heater 3.

Referring to fig. 2, the present invention provides an extruding machine, the extruding machine includes an extruding unit, the extruding unit includes a cylinder 2, a screw 5 is disposed inside the cylinder 2, the screw 5 is driven to be connected with a motor, so that the power and the rotating speed of the screw 5 are stable, a plastic material is propelled forward under the action of the screw 5 to generate pressure stirring, when the screw 5 rotates, friction heat is generated with the plastic material to melt the plastic, a heater 3 is further disposed on the screw 5 to heat the screw 5, a plurality of temperature sensors are disposed outside the cylinder 2 to detect the temperature of the cylinder 2, a cooler 4 is further disposed on the cylinder 2, the cooler 4 is used to cool the screw 5, so that the plasticizing temperature of the plastic is within a preset temperature range, a hopper 1 is disposed at the top of the cylinder 2, the hopper 1 is used for conveying materials into the machine barrel 2, the machine barrel 2 is further provided with a machine head, and the machine head is provided with a porous plate, a screen, a connecting pipe, a flow divider, a die core seat and a die 6 and used for extruding the plastic plasticized by the screw 5 into continuous materials in various shapes through the machine head and the dies 6 in different shapes.

Specifically, in the embodiment of the invention, the central control unit determines the material parameter values according to the information of the material, the melting point, the volume resistivity, the tensile strength and the elongation of the material to be injection-molded in the material parameter matrix A,

z＝a/a0+b/b0+c/c0+d/d0+e/e0

wherein z represents a parameter value of the material, a represents a density of the material, a0 represents a preset density of the material, b represents a melting point of the material, b0 represents a preset melting point of the material, c represents a volume resistivity of the material, c0 represents a preset volume resistivity of the material, d represents a tensile strength of the material, d0 represents a preset tensile strength of the material, e represents an elongation of the material, and e0 represents a preset elongation of the material.

Specifically, theIn the embodiment of the present invention, the preset density a0 is 1g/cm³The preset melting point b0 is 150 ℃, the preset volume resistivity c0 is 1000 Ω · m, and the preset tensile strength d0 is 10N/mm²The preset elongation e0 is 150%, the preset value is not limited in the present invention, and other values may be set.

Specifically, in the embodiment of the present invention, the screw 5 includes a material receiving screw region, the material receiving screw region is a region where the material is conveyed forward under the action of the rotating screw after entering the screw from the hopper 1, the screw region is sequentially divided into a first screw region, a second screw region, a third screw region, a fourth screw region and a fifth screw region after passing through the material receiving screw region, the material is compacted and plasticized one by one, the first screw region is provided with a first heater, the second screw region is provided with a second heater, the third screw region is provided with a third heater, the fourth screw region is provided with a fourth heater, and the fifth screw region is provided with a fifth heater.

Specifically, in the embodiment of the present invention, the heaters 3 are each provided with a cooler 4, the heater 3 is used for heating, the cooler 4 is used for cooling the screw, and the cooler 4 includes a first cooler, a second cooler, a third cooler, a fourth cooler and a fifth cooler. The distribution of the first screw area, the second screw area, the third screw area, the fourth screw area and the fifth screw area of the screw can be distributed according to the specific length of the screw, the invention does not limit the partition condition of the screw, and the invention belongs to the protection scope as long as the preparation and the production of the invention are satisfied.

Specifically, in the embodiment of the present invention, the central control unit is connected to the first heater, the second heater, the third heater, the fourth heater, and the fifth heater, respectively, and adjusts operating parameters of the first heater, the second heater, the third heater, the fourth heater, and the fifth heater, respectively. The central control unit regulates the heater 3 and the cooler 4 to keep the temperature of the area of the screw 5 in which the heater and the cooler are positioned within a certain range.

An operating matrix group WJ (WJ1, WJ2 and WJ3 … WJn) of the heater is preset in the central control unit, wherein WJ1 represents a first preset operating parameter of the heater, WJ2 represents a second preset operating parameter of the heater, WJ3 represents a third preset operating parameter of the heater, and WJn represents an nth preset operating parameter of the heater.

An operation matrix WJi for the i-th heater (WJi1, WJi2, WJi3, WJi4, WJi5), where WJi1 denotes a preset heating temperature of the first heater, WJi2 denotes a preset heating temperature of the second heater, WJi3 denotes a preset heating temperature of the third heater, WJi4 denotes a preset heating temperature of the fourth heater, WJi5 denotes a preset heating temperature of the fifth heater, WJi1 < WJi2 < WJi3 < WJi4 < WJi 5.

Specifically, in the embodiment of the present invention, a material parameter matrix Z (Z1, Z2, Z3 … Zn) is preset in the central control unit, where Z1 represents a first preset material parameter value, Z2 represents a second preset material parameter value, Z3 represents a third preset material parameter value, and Zn represents an nth preset material parameter value;

the central control unit determines the working parameters of the heater 3 according to the material parameter values of the materials to be injected,

if Z is less than or equal to Z1, the central control unit selects the working matrix group of the heater as WJ1, selects WJ11 from WJ1 as the heating temperature of the first heater, selects WJ12 as the heating temperature of the second heater, selects WJ13 as the heating temperature of the third heater, selects WJ14 as the heating temperature of the fourth heater, and selects WJ15 as the heating temperature of the fifth heater;

if Z1 is larger than or equal to Z2, the central control unit selects the working matrix group of the heater as WJ2, selects WJ21 from WJ2 as the heating temperature of the first heater, selects WJ22 as the heating temperature of the second heater, selects WJ23 as the heating temperature of the third heater, selects WJ24 as the heating temperature of the fourth heater, and selects WJ25 as the heating temperature of the fifth heater;

if Z2 is larger than or equal to Z3, the central control unit selects the working matrix group of the heater as WJ3, selects WJ31 from WJ3 as the heating temperature of the first heater, selects WJ32 as the heating temperature of the second heater, selects WJ33 as the heating temperature of the third heater, selects WJ34 as the heating temperature of the fourth heater, and selects WJ35 as the heating temperature of the fifth heater;

if Z (n-1) < Z ≦ Zn, the central control unit selects WJN as the working matrix group of the heater, selects WJN1 from WJN as the heating temperature of the first heater, selects WJN2 as the heating temperature of the second heater, selects WJN3 as the heating temperature of the third heater, selects WJN4 as the heating temperature of the fourth heater, and selects WJN5 as the heating temperature of the fifth heater.

Specifically, in the embodiment of the present invention, the temperature of the first screw section of the screw 5 may be set to 150 ℃, the temperature of the second screw section of the screw may be set to 160 ℃, the temperature of the third screw section of the screw may be set to 165 ℃, the temperature of the fourth screw section of the screw may be set to 170 ℃, and the temperature of the fifth screw section may be set to 172 ℃. For example, the temperature of the first screw region of the screw may be set to 175 deg.c, the temperature of the second screw region of the screw may be set to 180 deg.c, the temperature of the third screw region of the screw may be set to 190 deg.c, the temperature of the fourth screw region of the screw may be set to 200 deg.c, and the temperature of the fifth screw region may be set to 210 deg.c. The present invention is not limited to specific temperature settings and zones, and is subject to specific implementation.

Specifically, in the embodiment of the invention, the central control unit calculates the length, the diameter, the length-diameter ratio and the compression ratio of the screw to obtain the screw reference value y,

y＝0.5×L/L0+0.4×D/D0+0.3×(L/D)/(L0/D0)+0.6×S/S0

where y denotes a screw reference value, L denotes a length of the screw, L0 denotes a preset length of the screw, D denotes a diameter of the screw, D0 denotes a preset diameter of the screw, S denotes a compression ratio of the screw, and S0 denotes a preset compression ratio of the screw.

Specifically, in the examples of the present invention, the longer the diameter of the screw 5 is, the more the constant is significantly increased, and the efficiency of the extruder in which the screw 5 having the length-diameter ratio of 18 times is used is high. The compression ratios of the different extruders are different and a large compression ratio also allows sufficient plasticization of the granulated plastic.

Specifically, in the embodiment of the invention, a screw reference matrix Y and a rotating speed matrix V of a screw are preset in the central control unit;

for the screw reference matrix Y (Y1, Y2, Y3 … Yn), wherein Y1 denotes a first preset screw reference value, Y2 denotes a second preset screw reference value, Y3 denotes a third preset screw reference value, Yn denotes an nth preset screw reference value;

a matrix V (V1, V2, V3 … Vn) is referenced to the screw, wherein V1 represents a first preset rotation speed of the screw, V2 represents a second preset rotation speed of the screw, V3 represents a third preset rotation speed of the screw, and Vn represents an nth preset rotation speed of the screw;

the central control unit determines the rotation speed of the screw according to the screw reference value y of the extruder,

if Y is less than or equal to Y1 and the working matrix group of the heater is WJ1, the central control unit determines that the rotating speed of the screw is V1;

if Y is greater than Y1 and less than or equal to Y2 and the working matrix group of the heater is WJ2, the central control unit determines that the rotating speed of the screw is V4;

if Y is greater than Y2 and less than or equal to Y3 and the working matrix group of the heater is WJ3, the central control unit determines that the rotating speed of the screw is V5;

if Y (n-1) < Y is less than or equal to Yn and the working matrix group of the heater is WJn, the central control unit determines that the rotating speed of the screw is Vn;

if Y (i-1) < Y is less than or equal to Yi, and the working matrix group of the heater is WJj, the central control unit determines the rotating speed of the screw to be V (i + j-1), and if the determined rotating speed of the screw is V (i + j-1) > Vn, the rotating speed of the screw is Vn.

Specifically, in the embodiment of the present invention, when the first-stage preparation of the cable is completed, the cable after the preparation is completed is measured, the thickness H of the cable is obtained, the first thickness threshold of the thickness of the cable is set to be H1, the second thickness threshold is set to be H2, and the preset thickness is set to be H0, when the thickness H of the actually prepared cable is smaller than the preset thickness H0, the central control unit adjusts the rotation speed Vi of the screw rod,

if H0-H is not more than H1, the rotation speed of the adjusting screw of the central control unit is V (i + 1);

if H1 is more than H0-H is less than or equal to H2, the rotation speed of the adjusting screw rod of the central control unit is V (i + 2);

if H0-H is more than H2, the central control unit judges the extruder to be in fault;

when the thickness of the cable prepared in real time is smaller than the preset thickness, the glue output amount of the extruding machine is small, and the central control unit adjusts the rotating speed of the extruding machine.

Specifically, in the embodiment of the invention, when the thickness H of the actually prepared cable is greater than the preset thickness H0, the central control unit adjusts the rotating speed Vi of the screw,

if H-H0 is not more than H1, the rotation speed of the adjusting screw of the central control unit is V (i-1);

if H1 is more than H-H0 and less than or equal to H2, the rotation speed of the adjusting screw rod of the central control unit is V (i-2);

if H-H0 is more than H2, the central control unit judges the extruder to be in fault;

when the thickness H of the actually prepared cable is equal to the preset thickness H0, the rotation speed Vi of the screw is not adjusted by the central control unit;

when the thickness of the cable prepared in real time is larger than the preset thickness, the glue output amount of the extruding machine is large, and the central control unit adjusts the rotating speed of the extruding machine.

Specifically, in the embodiment of the present invention, if the central control unit needs to adjust the rotation speed of the screw 5, the central control unit receives the detection data of the flow detector arranged at the outlet of the extruder on the glue output amount of the extruder, sets the glue output amount of the extruder as Q, the preset glue output amount as Q0, the first glue output threshold as Q1, and the second glue output threshold as Q2, when the actual glue output amount Q of the extruder is smaller than the preset glue output amount, the central control unit adjusts the operating parameters of the heater according to the difference between the glue output amount Q of the extruder and the preset glue output amount Q0,

if Q0-Q is less than or equal to Q1, the central control unit adjusts the working parameter of the heater to be WJ (i + 1);

if Q1 is not less than Q0-Q is not less than Q2, the central control unit adjusts the working parameter of the heater to be WJ (i + 2);

if Q0-Q > Q2, the central control unit judges the extruder to be in fault.

Specifically, in the embodiment of the invention, when the actual glue output Q of the extruder is greater than the preset glue output, the central control unit adjusts the operating parameters of the heater according to the difference between the glue output Q of the extruder and the preset glue output Q0,

if Q-Q0 is not more than Q1, the central control unit adjusts the working parameter of the heater to be WJ (i-1);

if Q1 is not less than Q-Q0 is not less than Q2, the central control unit adjusts the working parameter of the heater to be WJ (i-2);

if Q-Q0 is more than Q2, the central control unit judges the extruder to be in fault;

if Q is Q0, the central control unit does not adjust the working parameters of the heater.

So far, the technical solutions of the present invention have been described in connection with the preferred embodiments shown in the drawings, but it is easily understood by those skilled in the art that the scope of the present invention is obviously not limited to these specific embodiments. Equivalent changes or substitutions of related technical features can be made by those skilled in the art without departing from the principle of the invention, and the technical scheme after the changes or substitutions can fall into the protection scope of the invention.