阅读说明：本技术 一种细纱机落纱断纱的调整系统及其优化方法 (Adjusting system for doffing and yarn breaking of spinning frame and optimization method thereof ) 是由 沈方勇 杜亚杰 代俊 王璇 吴阳 沈忱 游智兵 吴洪武 孙夏青 于 2021-07-07 设计创作，主要内容包括：本发明提供了一种细纱机落纱断纱的优化调整系统及其优化方法,涉及纺织技术领域；所述优化方法包括：在触摸显示屏上设定参数；钢领到达指定位置A,开始改变罗拉速度和锭子速度,使得纤维须条捻度和强度降低；纤维须条捻度降低后,钢领向下运行到锭子绕纱区,并完成纤维须条绕纱1至2圈及弱捻绕纱；弱捻绕纱完成后,罗拉速度和锭子速度继续改变为正常纺纱速度,恢复正常捻度,纤维须条继续绕纱1至2圈及完成整个绕纱动作,钢领上升至自动落纱位,机器可开始自动落纱动作。与现有技术相比,本发明提供的方法简单实用,省时省力,且节约了成本,保证了细纱落纱工序的断纱效果的准确性,提高了设备的性能。(The invention provides an optimized adjusting system and an optimized method for doffing and yarn breaking of a spinning frame, and relates to the technical field of spinning; the optimization method comprises the following steps: setting parameters on a touch display screen; when the ring reaches the designated position A, the roller speed and the spindle speed are changed, so that the twist and the strength of the fiber strand are reduced; after the twist of the fiber strand is reduced, the steel collar moves downwards to a spindle yarn winding area, and the fiber strand yarn winding of 1 to 2 circles and the weak twist yarn winding are completed; after the weak twist winding is finished, the roller speed and the spindle speed are continuously changed into the normal spinning speed, the normal twist is recovered, the fiber strand is continuously wound for 1 to 2 circles and the whole winding action is finished, the steel collar is lifted to the automatic doffing position, and the machine can start the automatic doffing action. Compared with the prior art, the method provided by the invention is simple and practical, saves time and labor, saves cost, ensures the accuracy of the yarn breaking effect of the spun yarn doffing process, and improves the performance of equipment.)

1. An optimized adjusting system for doffing and yarn breaking of a spinning frame is characterized by comprising a lifting servo motor (1), a lifting servo driver (2), a PLC (programmable logic controller) controller (3), a roller servo driver (4), a roller servo motor (5), a frequency converter (6) and a variable frequency motor (7),

the lifting servo driver (2) is electrically connected with the PLC (3) and the lifting servo motor (1) respectively;

the roller servo driver (4) is electrically connected with the PLC controller (3) and the roller servo motor (5) respectively;

the frequency converter (6) is electrically connected with the PLC controller (3) and the variable frequency motor (7) respectively;

the lifting servo motor (1) is in multi-stage transmission connection with the ring (11) and is used for driving the ring (11) to do up-down reciprocating motion, and the lifting servo driver (2) synchronously acquires up-down lifting positions of the ring (11);

the roller servo motor (5) is in transmission connection with the roller (9) and is used for driving the roller (9) to rotate;

the variable frequency motor (7) is in multi-stage transmission connection with the spindle (14) and is used for driving the aluminum rod spindle (14) to rotate;

when the ring (11) moves up and down to reach the designated position A, the lifting servo driver (2) sends a signal to the PLC controller (3), and after the PLC controller (3) receives the signal, the speeds of the roller (9) and the aluminum rod spindle (14) are changed through the roller servo driver (4) and the frequency converter (6).

2. The system for optimizing and adjusting the doffing and breaking of the spinning frame according to claim 1, further comprising a touch display screen (8), wherein the touch display screen (8) is electrically connected with the PLC (3).

3. The system for optimizing and adjusting the doffing and yarn breaking of the spinning frame as claimed in claim 1, wherein the designated position A is a position of 5mm to 15mm above the ring (11) from the spindle yarn cutter (12).

4. The optimized adjusting system of the doffing and yarn breaking of the spinning frame as claimed in claim 1, wherein the rollers (9) comprise a front roller, a middle roller and a back roller, the roller servo motor (5) comprises a front roller motor, a middle roller motor and a back roller motor, and the front roller, the middle roller and the back roller are respectively in one-to-one corresponding transmission connection with the front roller motor, the middle roller motor and the back roller motor.

5. The system for optimizing and adjusting the doffing and breaking of spinning frames as claimed in claim 1, characterized in that said spindles (14) are made of aluminum metal.

6. The optimization method for doffing and yarn breaking of the spinning frame is characterized by comprising the following steps:

S₁: setting parameters on a touch display screen;

S₂: when the ring reaches the designated position A, the roller speed and the spindle speed are changed, so that the twist and the strength of the fiber strand are reduced;

S₃: after the twist of the fiber strand is reduced, the steel collar moves downwards to a spindle yarn winding area, and the fiber strand yarn winding of 1 to 2 circles and the weak twist yarn winding are completed;

S₄: after the weak twist winding is finished, the roller speed and the spindle speed are continuously changed into the normal spinning speed, the normal twist is recovered, the fiber strand is continuously wound for 1 to 2 circles and the whole winding action is finished, the steel collar is lifted to the automatic doffing position, and the machine can start the automatic doffing action.

7. The method for optimizing doffing and yarn breaking of spinning frame according to claim 6, characterized in that the calculation formula of the speed of the roller output fiber strand is as follows:

v_f＝πd_x(n_s-n_t)

wherein, in the formula: v. of_fFront roller watchA face velocity; dx-bobbin winding diameter; n is_s-spindle speed; n is_t-traveler rotation speed.

8. The method for optimizing the doffing and yarn breaking of the spinning frame according to claim 6, wherein the fiber strands at the spindle yarn cutter are in a weak twist state during automatic doffing, and the fiber strength is lower than a normal state.

Technical Field

The invention belongs to the technical field of spinning, and particularly relates to an adjusting system for doffing and yarn breaking of a spinning frame and an optimizing method thereof.

Background

With the continuous progress of the textile industry technology, the enterprise labor cost is continuously increased, the requirements of the textile industry on equipment and special parts are higher and higher, the ring spinning frame develops towards the directions of high efficiency, environmental protection, automation, refinement, long-distance spinning and compact spinning, and the automatic collective doffing becomes the key point of the development of the textile industry. The yarn breakage effect and the end retaining rate of automatic integrated doffing are more key indexes for measuring the stability of equipment in a textile mill.

At present, in order to solve the problem of yarn breakage during automatic doffing, aluminum rod spindles with yarn cutters are generally used in China, however, the problem of unstable yarn breakage effect exists due to the fact that the spindle yarn cutters are different in service time limit and spinning process.

Disclosure of Invention

The invention aims to provide a regulating system for doffing and yarn breaking of a spinning frame, aiming at the problems of service time limit of a spindle yarn cutter of the spinning frame, spinning process (low count yarn) and the like, and causing the phenomenon of poor automatic doffing and yarn breaking, and further providing an optimization method for doffing and yarn breaking of the spinning frame.

In order to solve the problems, the invention provides a regulating system for doffing and yarn breaking of a spinning frame, which comprises a lifting servo motor, a lifting servo driver, a PLC (programmable logic controller), a roller servo driver, a roller servo motor, a frequency converter and a variable frequency motor,

the lifting servo driver is electrically connected with the PLC and the lifting servo motor respectively;

the roller servo driver is electrically connected with the PLC and the roller servo motor respectively;

the frequency converter is electrically connected with the PLC and the variable frequency motor respectively;

the lifting servo motor is in multi-stage transmission connection with the ring and is used for driving the ring to do up-down lifting reciprocating motion, and the lifting servo driver synchronously acquires up-down lifting positions of the ring;

the roller servo motor is in transmission connection with the roller and is used for driving the roller to rotate;

the variable frequency motor is in multi-stage transmission connection with the spindle and is used for driving the aluminum rod spindle to rotate;

when the ring moves up and down to reach the designated position A, the lifting servo driver sends a signal to the PLC controller, and the PLC controller receives the signal and then changes the speeds of the roller and the aluminum rod spindle through the roller servo driver and the frequency converter.

Further, still include touch display screen, touch display screen with PLC controller electric connection.

Further, the specified position A is a position 5 mm-15 mm away from the upper part of the spindle yarn cutter from the steel collar.

Further, the roller includes preceding roller, well roller and back roller, roller servo motor includes preceding roller motor, well roller motor and back roller motor, preceding roller well roller and the back roller respectively with preceding roller motor well roller motor with one-to-one correspondence transmission of back roller motor is connected.

Furthermore, the spindle is made of an aluminum metal material.

The invention also provides an optimization method for the doffing and yarn breaking of the spinning frame, which is applied to an adjustment system for the doffing and yarn breaking of the spinning frame, and the optimization method specifically comprises the following steps:

S₁: at the touchSetting parameters on a display screen;

S₂: when the ring reaches the designated position A, the roller speed and the spindle speed are changed, so that the twist and the strength of the fiber strand are reduced;

S₃: after the twist of the fiber strand is reduced, the steel collar moves downwards to a spindle yarn winding area, and the fiber strand yarn winding of 1 to 2 circles and the weak twist yarn winding are completed;

S₄: after the weak twist winding is finished, the roller speed and the spindle speed are continuously changed into the normal spinning speed, the normal twist is recovered, the fiber strand is continuously wound for 1 to 2 circles and the whole winding action is finished, the steel collar is lifted to the automatic doffing position, and the machine can start the automatic doffing action.

Further, the calculation formula of the speed of the fiber strand output by the roller is as follows:

V_f＝πd_X(n_s-n_t)

wherein, in the formula: v. of_f-front roller surface speed; dx-bobbin winding diameter; n is_s-spindle speed; n is_t-traveler rotation speed.

Furthermore, during automatic doffing, the fiber strands at the spindle yarn cutter are in a weak twist state, and the fiber strength is lower than that in a normal state.

Compared with the prior art, the invention has the following advantages and effects:

1. when automatic doffing is carried out, the fiber strand at the spindle yarn cutter is in a weak twist state, the fiber strength is lower than that of the fiber strand in a normal state, the yarn breaking effect is ensured, and the service life of the spindle yarn cutter is prolonged.

2. During automatic doffing, the fiber strand is recovered to normal twist degree at the later stage of yarn winding action, the fiber strength is recovered to normal, and the head remaining rate of automatic doffing cannot be influenced.

3. The method is simple and practical, saves time and labor, saves cost and improves the performance of equipment.

Drawings

FIG. 1 is a schematic view of the working state of a spinning frame during doffing and yarn breaking according to an embodiment of the present invention;

FIG. 2 is a schematic view showing a state in which a ring is moved in a traveler according to an embodiment of the present invention;

FIG. 3 is a schematic structural diagram of a transmission system for doffing and yarn breaking of a spinning frame according to an embodiment of the present invention;

FIG. 4 is a schematic diagram of a control structure of a transmission system for doffing and yarn breaking of a spinning frame according to an embodiment of the present invention;

fig. 5 is a flow chart of a method for optimizing doffing and yarn breaking of a spinning frame according to an embodiment of the present invention.

Description of reference numerals:

1-a lifting servo motor; 2-a lifting servo driver; 3-a PLC controller; 4-roller servo driver; 5-roller servo motor; 6-a frequency converter; 7-a variable frequency motor; 8-touch display screen; 9-roller; 9 a-pronura; 9 b-middle roller; 9 c-a back roller; 10-a fiber strand; 11-a ring; 12-spindle yarn cutter; 13-spindle winding area; 14-spindle.

Detailed Description

The technical solutions of the present invention will be described clearly and completely with reference to the accompanying drawings, and it should be understood that the described embodiments are some, but not all embodiments of the present invention. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

In the description of the present invention, it should be noted that, unless otherwise explicitly specified or limited, the terms "mounted," "connected," and "connected" are to be construed broadly, e.g., as meaning either a fixed connection, a removable connection, or an integral connection; can be mechanically or electrically connected; the two elements may be directly connected or indirectly connected through an intermediate medium, or may be connected internally, wirelessly or by wire. The specific meanings of the above terms in the present invention can be understood in specific cases to those skilled in the art.

Referring to fig. 1-5, one embodiment of the present invention provides an optimized adjustment system for doffing and yarn breaking of a spinning frame, which includes a lifting servo motor 1, a lifting servo driver 2, a PLC controller 3, a roller servo driver 4, a roller servo motor 5, a frequency converter 6, a frequency conversion motor 7, and a touch display screen 8.

The lifting servo driver 2 is electrically connected with the PLC 3 and the lifting servo motor 1 respectively; the roller servo driver 4 is respectively electrically connected with the PLC controller 3 and the roller servo motor 5; the frequency converter 6 is respectively electrically connected with the PLC 3 and the variable frequency motor 7;

the lifting servo motor 1 is in multi-stage transmission connection with the ring 11 and is used for driving the ring 11 to do up-and-down lifting reciprocating motion;

the roller servo motor 5 is in transmission connection with the roller 9 and is used for driving the roller 9 to rotate;

the variable frequency motor 7 is in multi-stage transmission connection with the aluminum rod spindle 14 and is used for driving the aluminum rod spindle 14 to rotate;

the lifting servo driver 2 is used for collecting the up-down lifting position of the ring 11, when the ring 11 reaches the designated position A, the lifting servo driver 2 sends a signal to the PLC controller 3, after the PLC controller 3 receives the signal, the speed of the roller 9 and the speed of the aluminum rod spindle 14 are changed through the roller servo driver 4 and the frequency converter 6, the speed of the roller 9 is increased, the speed of the aluminum rod spindle 14 is reduced, and therefore the twist of the fiber strand 10 is reduced, the strength and the elasticity of the fiber strand 10 are reduced due to the reduction of the twist, and the fiber strand 10 can be cut off by the spindle cutter 12 conveniently in the later period;

after the twist of the fiber strand 10 is reduced, the ring 11 continues to move downwards to a spindle winding area 13, and passes through a spindle yarn cutter 12 in the period, and the winding of 1 to 2 circles and the weak twist winding of the fiber strand 10 are completed;

after the weak twist winding is finished, the speed of the roller 9 and the speed of the aluminum rod spindle 14 are continuously changed into the normal spinning speed, the normal twist is recovered, the fiber strand 11 is continuously wound for 1 to 2 circles and the whole winding action is finished, the steel collar 11 is lifted to the automatic doffing position, and the machine can start the automatic doffing action.

It should be explained that: roller: the elements of the textile machine for tensioning the yarn, the cylindrical rotating elements of the textile machine for feeding, drafting, delivery, etc., have the meaning of rollers and shafts. It is widely used in drafting, carding, conveying and other mechanisms.

The functions of the roller are divided into a drawing roller, a feeding roller, a compacting roller, a working roller and the like. The drafting rollers are the main components of the drafting mechanism of the spinning machine, and are composed of upper rollers and lower rollers in pairs to form roller nip for holding the sliver for drafting. The quality of the rollers directly affects the uniformity of the output sliver. When not illustrated, the roller is a drawing bottom roller, which is a steel slender shaft with grooves, knurling or smooth surface on the excircle, and several single sections are connected into a whole line along the whole length of the spinning machine, and are actively driven by a transmission mechanism, which is generally made of steel material, and the surface is carved with grooves or knurling.

It should also be explained that the steel collars (steel collars) refer to the circular parts of steel used for twisting and winding in robots, ring frames and ring twisting machines, which replace the labour of workers in the painting, mining and smelting sectors. The ring of the ring ingot refers to a steel collar.

The steel ring has its edge projected out of the ring and the yarn drives the ring to rotate on the ring track. The wire ring rotates for a circle, and the yarn is added with a twist. The wire loops are typically notched loops formed by bending wire. It is closely attached to the inner side of the ring runway and slides due to the action of centrifugal force when rotating on the ring. The relative speed of the steel wire ring and the steel collar is very high, and the steel wire ring is worn and burnt or rotates unstably due to abrasion and high temperature (above 300 ℃). The tension and friction of the yarn during spinning also causes the traveler to deflect and jump. When the end of the traveler collides with the neck wall of the ring, it will cause instantaneous shaking or wedge. Both of these phenomena can cause yarn breakage. Therefore, the combination of the ring and the traveler is required to be adaptable to high-speed operation with less broken ends and convenient use and operation, and the new ring and the new traveler are required to have short mature period and long service life of the ring. The main operational performance of rings and travelers is often expressed in terms of the linear speed that can be achieved during normal spinning.

Further, referring to fig. 3, in an embodiment of the present invention, the system for optimizing and adjusting doffing and breaking of the spinning frame further includes a touch display screen 8, wherein the touch display screen 8 is electrically connected to the PLC controller 3 for displaying and modifying the relevant parameters.

Referring to fig. 1, in the embodiment of the present invention, the designated position a is a position where the ring 11 is 5mm to 15mm above the spindle yarn cutter 12.

In the present embodiment, the specified position a is 10mm from the spindle yarn cutter of the ring 11, and it should be noted that the specified position a must be located above the spindle yarn cutter.

Referring to fig. 1, in the embodiment of the present invention, the roller 9 includes a front roller 9a, a middle roller 9b and a back roller 9c, the roller servo motor 5 includes a front roller motor, a middle roller motor and a back roller motor, and the front roller 9a, the middle roller 9b and the back roller 9c are in one-to-one transmission connection with the front roller motor, the middle roller motor and the back roller motor respectively.

Preferably, in the embodiment of the present invention, the spindle 14 is made of aluminum metal.

Referring to fig. 5, an embodiment of the present invention further provides an optimization method for doffing and yarn breaking of a spinning frame, where an optimization adjustment system in the embodiment is adopted, and when the spinning frame doffs and yarn breaking occurs, the optimization adjustment method includes the following steps:

S₁: setting parameters on the touch display screen 8;

S₂: when the ring 11 reaches the designated position A, the speed of the roller 9 and the speed of the aluminum rod spindle 14 are changed, so that the twist of the fiber strand 10 is reduced, and the strength of the fiber strand 10 is reduced;

S₃: after the twist of the fiber strand 10 is reduced, the ring 11 moves downwards to a spindle yarn winding area 13, and the yarn winding of the fiber strand 11 is completed for 1 to 2 circles and the weak twist yarn winding;

it should be noted that, the twisting and winding process: the yarn guide hook from the front roller → the steel wire ring → the bobbin, the wire tension drags the steel wire ring to rotate along the steel collar, and the steel wire ring rotates a yarn strip along the steel collar to obtain a twist.

The yarn is divided into three sections: spinning section, balloon section, winding section

S₄: after the weak twist winding is finished, the speed of the roller 9 and the speed of the spindle 14 are continuously changed into the normal spinning speed, the normal twist is recovered, the fiber strand 11 is continuously wound for 1 to 2 circles and the whole winding action is finished, the steel collar 11 is lifted to the automatic doffing position, and the machine can start the automatic doffing action.

Specifically, the task of the spinning process is divided into the following steps:

1. drafting: the roving is drawn to the desired tex.

2. Twisting: and a certain twist is added to the drawn sliver so that the sliver has certain strength, elasticity and luster.

3. Winding: and winding the spun yarn into a cop for convenient transportation and post-processing.

Further, the calculation formula of the speed of the fiber strand output by the roller is as follows:

v_f＝πd_x(n_s-n_t)

wherein, in the formula: v_f-front roller surface speed; dx-bobbin winding diameter; n is_s-spindle speed; n is_t-traveler rotation speed.

The rotation speed of the traveller is less than that of the bobbin, and the winding elements are spindle + traveller, the winding speed being equal to the speed of the output strand of the front roller, irrespective of the twist.

Furthermore, during automatic doffing, the fiber strands at the spindle yarn cutter are in a weak twist state, and the fiber strength is lower than that in a normal state.

In this document, the terms front, back, upper and lower are used to define the components in the drawings and the positions of the components relative to each other, and are used for clarity and convenience of the technical solution. It is to be understood that the use of the directional terms should not be taken to limit the scope of the claims.

Although the present disclosure has been described above, the scope of the present disclosure is not limited thereto. Various changes and modifications may be effected therein by one of ordinary skill in the pertinent art without departing from the spirit and scope of the present disclosure, and these changes and modifications are intended to be within the scope of the present disclosure.