阅读说明：本技术 一种线缆护套外径闭环控制实现的方法和装置 (Method and device for realizing closed-loop control of outer diameter of cable sheath ) 是由 郑桂胜 于兴强 金涛 杨笛雨 刘国峰 牟龙兴 张宪恒 唐振龙 李超 于 2020-11-06 设计创作，主要内容包括：本发明公开了一种线缆护套外径闭环控制实现的方法,在挤出机的机头和冷却水槽之间增加一台测径仪,在冷却水槽之后增加一台测径仪；通过两台测径仪,测量线缆进入冷却水槽前的外径值为A,测量线缆经过冷却水槽后的外径值为B,并得到线缆外径冷却前后的差值C,C＝A-B。该方法节省人力,不需要人为实时观看、调整,线径控制精度高、稳定,可节省原材料,使用简单、可靠、快捷。(The invention discloses a method for realizing closed-loop control of the outer diameter of a cable sheath, which is characterized in that a diameter measuring instrument is additionally arranged between a machine head of an extruder and a cooling water tank, and a diameter measuring instrument is additionally arranged behind the cooling water tank; through two diameter measuring instruments, the outer diameter value of the measuring cable before entering the cooling water tank is A, the outer diameter value of the measuring cable after passing through the cooling water tank is B, and the difference C before and after the outer diameter of the measuring cable is cooled is obtained, wherein C is A-B. The method saves manpower, does not need manual real-time viewing and adjustment, has high and stable wire diameter control precision, can save raw materials, and is simple, reliable and quick to use.)

1. A method for realizing closed-loop control of the outer diameter of a cable sheath is characterized by comprising the following steps: the method comprises the following steps:

1. adding a diameter measuring instrument between the head of the extruder and a cooling water tank, and adding a diameter measuring instrument behind the cooling water tank;

2. through the two diameter measuring instruments, the outer diameter value of the cable before entering the cooling water tank is measured to be A, the outer diameter value of the cable after passing through the cooling water tank is measured to be B, and the difference C before and after the outer diameter of the cable is cooled is obtained, wherein C is A-B;

3. setting a target value D and a difference value C of the outer diameter of the cable in the system, and obtaining an outer diameter value E before the cable is cooled, wherein E is C + D;

4. the extrusion amount of the extruder can be calculated through the outer diameter value E before the cable is cooled, so that the real and stable outer diameter of the cable is obtained.

5. Repeating steps 2 and 3 to allow B to approach D indefinitely.

2. The method for realizing closed-loop control of the outer diameter of the cable sheath according to claim 1, wherein the method comprises the following steps: in the step 2, the external diameter values A and B before and after the cooling of the cable are measured, and the value B is measured after a certain time interval is needed after the value A is measured, so that the measured values A and B can be ensured to be the diameter of the same cable section, and a corrected difference value C is obtained.

3. The method for realizing closed-loop control of the outer diameter of the cable sheath according to claim 2, wherein the method comprises the following steps: and step 2, after correcting the C, measuring the outer diameter of the cable at certain intervals, and ensuring that the B is a product after measurement and correction.

4. The method for realizing closed-loop control of the outer diameter of the cable sheath according to claim 1, wherein the method comprises the following steps: and 3, the outer diameter value E before the cable is cooled is equal to C + D, and the difference C is the difference after correction after the previous measurement.

5. The method for realizing closed-loop control of the outer diameter of the cable sheath according to claim 1, wherein the method comprises the following steps: in the step 4, the extrusion amount of the extruder is adjusted each time, and then the external diameter values A and B of the cable are measured again after the extruder is paused for a period of time, so that the pressure release of the extruder tends to be stable.

6. The method for realizing closed-loop control of the outer diameter of the cable sheath according to claim 1, wherein the method comprises the following steps: the utility model provides a device that cable sheath external diameter closed-loop control realized, includes calliper, extruder, cooling trough, the calliper is equipped with two, and one calliper arranges between extruder and cooling trough for the calliper before the cooling, and another calliper arranges behind the cooling trough for the calliper after the cooling.

Technical Field

The invention belongs to the field of cable manufacturing, and particularly relates to a method and a device for realizing closed-loop control of the outer diameter of a cable sheath.

Background

The cable outer sheath is obtained by extruding the cable outer sheath through an extruder and then cooling the cable outer sheath through a cooling water tank in the production process. The outer diameter control of the existing cable outer sheath is open-loop control, the thickness of the outer diameter needs to be checked and adjusted manually in real time, the distance between an extrusion point and a diameter measuring point is about 60 meters, and the hysteresis is large; the fluctuation of the open-loop control wire diameter is large, and particularly, the phenomenon that the outer diameter deviation is too large and defective products appear easily in the speed increasing and reducing process is caused; in order to ensure the qualified outer diameter, operators are generally used to make the outer diameter larger so as to reach the aim that the outer diameter can be above the minimum outer diameter even if the outer diameter fluctuates, defective products are not produced, and thus raw materials are wasted.

Disclosure of Invention

In order to overcome the defects of the prior art, the invention provides the method and the device for realizing the closed-loop control of the outer diameter of the cable sheath, which save manpower, do not need manual real-time watching and adjustment, have high and stable wire diameter control precision, can save raw materials, and are simple, reliable and quick to use.

In order to achieve the purpose, the invention adopts the following technical scheme: a method for realizing closed-loop control of the outer diameter of a cable sheath comprises the following steps:

1. adding a diameter measuring instrument between the head of the extruder and a cooling water tank, and adding a diameter measuring instrument behind the cooling water tank;

2. through the two diameter measuring instruments, the outer diameter value of the cable before entering the cooling water tank is measured to be A, the outer diameter value of the cable after passing through the cooling water tank is measured to be B, and the difference C before and after the outer diameter of the cable is cooled is obtained, wherein C is A-B;

3. setting a target value D and a difference value C of the outer diameter of the cable in the system, and obtaining an outer diameter value E before the cable is cooled, wherein E is C + D;

4. the extrusion amount of the extruder can be calculated through the outer diameter value E before the cable is cooled, so that the real and stable outer diameter of the cable is obtained.

5. Repeating steps 2 and 3 to allow B to approach D indefinitely.

In the above technical solution, in step 2, after the external diameter values a and B before and after the cooling of the cable are measured, a time interval is required to measure the value B, so that it can be ensured that the measured values a and B are the diameter of the same cable, and a corrected difference value C is obtained.

In the above technical scheme, in step 2, after correcting C, the outer diameter of the cable is measured after a certain length is separated, and it is ensured that B is a product after measurement and correction.

In the above technical solution, in step 3, the outer diameter value E before the cable is cooled is equal to C + D, and the difference C is a difference corrected after the previous measurement.

In the technical scheme, in the step 4, the extrusion amount of the extruder is adjusted each time, and then the external diameter values A and B of the cable are measured again after the extruder is paused for a period of time, so that the pressure release of the extruder tends to be stable.

The utility model provides a device that cable sheath external diameter closed-loop control realized, includes calliper, extruder, cooling trough, the calliper is equipped with two, and one calliper arranges between extruder and cooling trough for the calliper before the cooling, and another calliper arranges behind the cooling trough for the calliper after the cooling.

The invention has the beneficial effects that: manpower is saved, and manual real-time viewing and adjustment are not needed; the wire diameter control precision is high and stable; raw materials can be saved; the use is simple, reliable and quick.

Drawings

FIG. 1 is a schematic structural diagram of the present invention.

Wherein: 1. a cooling front diameter gauge 2, a cooling rear diameter gauge 3, an extruder 4, a cooling water tank 5 and a cable.

Detailed Description

The invention is further described with reference to the following figures and specific embodiments.

A method for realizing closed-loop control of the outer diameter of a cable sheath comprises the following steps:

1. a diameter measuring instrument is added between the head of the extruder and a cooling water tank, and a warp measuring instrument is added behind the cooling water tank;

2. through two diameter measuring instruments, the outer diameter value of a measured cable before entering a cooling water tank is A, the outer diameter value of the measured cable after passing through the cooling water tank is B, and the difference C before and after the outer diameter of the measured cable is cooled is obtained, wherein C is A-B, and is basically a fixed value under the condition of the same cable type and the same raw material;

3. setting a target value D and a difference value C of the outer diameter of the cable in the system, and obtaining an outer diameter value E before the cable is cooled, wherein E is C + D;

4. the extrusion amount of the extruder can be calculated through the outer diameter value E before the cable is cooled, so that the real and stable outer diameter of the cable is obtained.

5. Repeating steps 2 and 3 to allow B to approach D indefinitely.

In the above technical solution, in step 2, after the external diameter values a and B before and after the cooling of the cable are measured, a time interval is required to measure the value B, so that it can be ensured that the measured values a and B are the diameter of the same cable, and a corrected difference value C is obtained.

The system is started to produce but is not put into operation, the diameter of the wire is manually controlled to be within a qualified range, when a qualified product is cooled and then the diameter gauge is measured, the system automatically calculates C and corrects the C, and after correction is finished, the system can be started to put into operation.

In the above technical scheme, in step 2, after correcting C, the outer diameter of the cable is measured after a certain length is separated, and it is ensured that B is a product after measurement and correction.

In the above technical solution, in step 3, the outer diameter value E before the cable is cooled is equal to C + D, and the difference C is a difference corrected after the previous measurement.

In the technical scheme, in the step 4, the average value of a section of product is measured to be used as a true value, the external diameter values A and B of the cable are measured again after the extrusion amount of the extruder is adjusted for a period of time, and the pressure release of the extruder tends to be stable.

The two calipers control two variables, and then are matched with each other, so that the effect of real-time closed-loop control is achieved.

The device for realizing closed-loop control of the outer diameter of the cable sheath shown in fig. 1 comprises two diameter gauges, an extruder 3 and a cooling water tank 4, wherein one diameter gauge is arranged between the extruder 3 and the cooling water tank 4 and is used for cooling a front diameter gauge 1, and the other diameter gauge is arranged behind the cooling water tank 4 and is used for cooling a rear diameter gauge 2. The outer diameter of the cable 5 is measured by two calipers.

The above description is only for the preferred embodiment of the present invention, but the scope of the present invention is not limited thereto, and any changes or substitutions that can be easily conceived by those skilled in the art within the technical scope of the present invention are included in the scope of the present invention.