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CN-122025295-A - Twisting device and twisting method for cable processing

CN122025295ACN 122025295 ACN122025295 ACN 122025295ACN-122025295-A

Abstract

The application relates to the technical field of cable manufacture, in particular to a twisting device and a twisting method for cable processing, wherein the method comprises the steps of obtaining tension data of each single wire to be twisted in a preset analysis window before the starting moment of the current control period in the whole twisting process; the tension similarity representing the consistency of the stress states of the two single wires to be twisted is calculated, all the single wires to be twisted are divided into different stranded wire groups according to the tension similarity, the tension distribution weight of each single wire to be twisted is determined, a reference tension value representing a tension regulation and control target in a current control period is obtained, and in the current control period, the tension in the twisting process is cooperatively regulated and controlled by utilizing a PID controller according to the degree that the tension states of all the single wires to be twisted deviate from the reference tension value in real time. The application obviously improves the roundness of the stranded conductor and the pitch uniformity of the stranded conductor.

Inventors

  • Wan Honglv
  • PAN PENGCHENG

Assignees

  • 三峡大学

Dates

Publication Date
20260512
Application Date
20260413

Claims (10)

  1. 1. A stranding method for cable processing, characterized in that the method comprises the steps of: In the whole twisting process, aiming at the current control period, tension data of each single wire to be twisted in a preset analysis window before the starting moment of the current control period are obtained; Based on tension data in an analysis window, evaluating trend cooperativity of tension change and difference of overall tension level between any two single wires to be stranded, calculating tension similarity representing consistency of stress states of the two single wires to be stranded, and dividing all the single wires to be stranded into different stranded wire groups; Evaluating the importance degree of each single wire to be stranded in tension regulation and control by the distribution characteristics of the self tension of each single wire to be stranded and the quantity scale of the stranded wire group to which the single wire to be stranded belongs, determining the tension distribution weight of each single wire to be stranded, and combining the average level of tension data of the single wires to be stranded in an analysis window to obtain a reference tension value representing a tension regulation and control target in the current control period; And in the current control period, the tension in the twisting process is cooperatively regulated and controlled by utilizing a PID controller according to the degree of deviation of the tension states of all the single wires to be twisted in each twisted wire group from the reference tension value in real time.
  2. 2. The stranding method for cable processing as defined in claim 1, wherein the tension similarity obtaining method is as follows: Calculating the difference of the average tension between any two single wires to be stranded in the analysis window as the relative difference; Aiming at an analysis window, calculating the correlation degree of the tension data at all moments between any two single wires to be twisted; The tension similarity has a positive correlation with the degree of correlation and a negative correlation with the relative difference.
  3. 3. The stranding method for cable processing as set forth in claim 2, wherein the calculation process of the tension similarity is that the relative difference is mapped negatively to be converted into a very large index, and the very large index is used as an evaluation index together with the correlation degree, so that comprehensive evaluation is performed on all the arbitrary two single wires to be stranded under an analysis window, and a comprehensive score of the arbitrary two single wires to be stranded is obtained as the tension similarity.
  4. 4. The stranding method for cable processing as recited in claim 1 wherein the dividing all of the individual wires to be stranded into different strand groups comprises constructing a weighted undirected graph with each individual wire to be stranded as a node and tension similarity as an edge weight between the nodes, and clustering the weighted undirected graph to divide all of the individual wires to be stranded into a plurality of strand groups.
  5. 5. The stranding method for cable processing of claim 1 wherein said determining a tension distribution weight for each single wire to be stranded comprises: determining tension stability through fluctuation characteristics of all tension data of each single wire to be twisted in an analysis window; counting the duty ratio of the number of the single wires to be stranded in all the single wires to be stranded contained in each stranded wire group, and performing positive mapping on the single wires to be stranded as the scale proportion of each stranded wire group; Taking the scale proportion of the stranded wire group of each single wire to be stranded as a weight, and taking the normalization result obtained after weighting the tension stability of the single wire to be stranded as the tension distribution weight of each single wire to be stranded.
  6. 6. The stranding method for cable processing of claim 5 wherein the tension stability is inversely related to the degree of dispersion of all tension data for each single wire to be stranded within the analysis window.
  7. 7. The stranding method for cable processing as set forth in claim 2, wherein the calculation process of the reference tension value is that the average tension and the tension distribution weight of all the single wires to be stranded are fused in a forward direction to obtain the reference tension value of the current control period.
  8. 8. The stranding method for cable processing as set forth in claim 7, wherein the specific process of the forward fusion is to weight and sum the average tensions of all the wires to be stranded with the weights assigned to the tensions as reference tension values of the current control period.
  9. 9. The stranding method for cable processing of claim 1 wherein said utilizing a PID controller to cooperatively regulate tension during stranding comprises: aiming at the current control period, calculating the average value of tension data of all single wires to be stranded in each stranded wire group at the same moment in real time, and taking the average value as a group tension average value; the method comprises the steps of calculating the difference between a group tension average value and a reference tension value to be used as a group deviation value, inputting the group deviation value of each stranded wire group into a PID controller, utilizing the output of the PID controller to be used as a cooperative compensation value, superposing the cooperative compensation value on basic operation instructions of servo motors of corresponding pay-off reels of all the single wires to be stranded in the stranded wire group, and adjusting the pay-off tension of the single wires to be stranded by finely adjusting the operation rotating speed of the servo motors.
  10. 10. The stranding device for cable processing is characterized by comprising a paying-off mechanism, a stranding host machine, a traction mechanism, a wire collecting mechanism and a control system, wherein the paying-off mechanism is used for bearing and releasing single wires to be stranded and comprises paying-off reels, each paying-off reel is correspondingly provided with a servo motor, the stranding host machine is used for stranding the single wires to be stranded to form conductors, the traction mechanism is used for traction of the stranded conductors, the wire collecting mechanism is used for orderly winding the stranded conductors on the wire collecting reels, and the control system is electrically and mechanically connected with the servo motor of the paying-off mechanism and is used for executing the stranding method for cable processing to adjust paying-off tension.

Description

Twisting device and twisting method for cable processing Technical Field The application relates to the technical field of cable manufacturing, in particular to a twisting device and a twisting method for cable processing. Background In the manufacture of aluminum alloy cables, twisting is a key process of spirally winding a plurality of single wires to be twisted according to a specific rule to form conductors, and the twisting quality directly determines the conductive efficiency, heat dissipation performance, stretching resistance and laying convenience of the cables. In the twisting process, the uniformity of paying-off tension is a key factor influencing twisting quality, and an ideal twisting process requires that each single wire is uniformly stressed at a twisting point so as to ensure the uniformity of conductor roundness and pitch. In the prior art, independent closed-loop control of single wires is usually adopted when tension control is carried out, but dynamic coupling of interaction among the single wires is ignored, tension oscillation and mutual interference are easy to generate when the single wires are twisted at high speed and multiple lines, and secondly, in actual production, due to factors such as winding displacement tightness, wire storage quantity change, wire coil weight difference and the like of each winding displacement, the paying-off tension of different single wires to be twisted has obvious difference and can present complex gradual fluctuation trend, meanwhile, due to the material characteristics of aluminum alloy, the sensitivity of the aluminum alloy to tension fluctuation is higher, obvious tension fluctuation can be caused by tiny resistance change, the inconsistency of stress states among the single wires is further aggravated, the problem that the single wires are stressed unevenly at twisting points, conductor arching, looseness or uneven pitch are easy to be caused, and the electrical performance and service life of a cable are seriously influenced. Disclosure of Invention In order to solve the technical problems, a twisting device and a twisting method for cable processing are provided to solve the existing problems. The application provides a twisting device and a twisting method for cable processing, which comprise the following steps: in a first aspect, embodiments of the present application provide a stranding method for cable processing, the method comprising the steps of: In the whole twisting process, aiming at the current control period, tension data of each single wire to be twisted in a preset analysis window before the starting moment of the current control period are obtained; Based on tension data in an analysis window, evaluating trend cooperativity of tension change and difference of overall tension level between any two single wires to be stranded, calculating tension similarity representing consistency of stress states of the two single wires to be stranded, and dividing all the single wires to be stranded into different stranded wire groups; Evaluating the importance degree of each single wire to be stranded in tension regulation and control by the distribution characteristics of the self tension of each single wire to be stranded and the quantity scale of the stranded wire group to which the single wire to be stranded belongs, determining the tension distribution weight of each single wire to be stranded, and combining the average level of tension data of the single wires to be stranded in an analysis window to obtain a reference tension value representing a tension regulation and control target in the current control period; And in the current control period, the tension in the twisting process is cooperatively regulated and controlled by utilizing a PID controller according to the degree of deviation of the tension states of all the single wires to be twisted in each twisted wire group from the reference tension value in real time. Preferably, the tension similarity obtaining method comprises the following steps: Calculating the difference of the average tension between any two single wires to be stranded in the analysis window as the relative difference; Aiming at an analysis window, calculating the correlation degree of the tension data at all moments between any two single wires to be twisted; The tension similarity has a positive correlation with the degree of correlation and a negative correlation with the relative difference. Preferably, the calculation process of the tension similarity comprises the steps of carrying out negative mapping on the relative difference to convert the relative difference into a very large index, and taking the very large index and the relative degree as an evaluation index together, so as to comprehensively evaluate all the arbitrary two single wires to be twisted under an analysis window, and obtaining the comprehensive score of the arbitrary two single wires to be twisted as the tension similarity. Preferabl