JPH04237510A - Control system for continuous drawing device - Google Patents

Abstract

PURPOSE:To offer a control system for continuous drawing device with which highly accurate drawing work can be executed. CONSTITUTION:In the control system for continuous drawing device with which a wire rod is continuously drawn with plural dies 42a 42n while driving a long sized wire rod 24 with plural drawing rolls 12a-12n, this invention is provided with plural motors 14a-14n with which the above-mentioned plural drawing rolls 12a-12n are individually driven and plural CPUs 76a-76n with which these plural motors 14a-14n are individually controlled.

Description

[Detailed description of the invention]

0001

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a control system for continuous wire drawing equipment.

0002

[Prior Art] Continuous wire drawing equipment uses multiple dies to gradually reduce the diameter of a wire rod to finally obtain a wire rod of a predetermined diameter, and in order to maintain the quality of the processed wire rod. It is very important to keep the wire transport speed and tension constant. FIG. 2 shows the configuration of a control system for a conventional continuous wire drawing apparatus. This control system includes a wire drawing motor 14 that drives wire drawing rolls 12a, 12b, 12c, and 12d in a wire drawing machine 10, and a wire drawing control section (16, 18, 20, 22) that controls this wire drawing motor 14. ), a winding motor 28 that drives a winding reel 26 that winds up the drawn wire 24, a winding control unit (32, 33, 34, 36) that controls this winding motor 28, and a wire drawing The wire rod 24 is composed of a dancer device 38 that adjusts the tension of the wire rod 24 between the machine 10 and the take-up reel 26.

The wire drawing machine 10 continuously draws the wire rod 24 sent out from the raw material reel 40, and has four dies 42a, 42b, which gradually reduce the diameter of the wire rod 24 at a predetermined ratio. 42c, 42d, and wire drawing rolls 12a, 12b, 12c, which drive the wire rod 24 rightward in the figure.
12d, and a wire drawing motor 14 that collectively drives these wire drawing rolls 12a to 12d.

The wire drawing control section includes a speed detection device 46 that detects the rotational speed of the motor 14, and a time starter unit 18 that obtains an acceleration time of a certain period based on an initial speed setting signal.
, a comparison circuit 20 that compares the signals of the speed detection device 46 and the time starter unit 18 , and a controller 22 that controls the motor 14 based on the output signal of the comparison circuit 20 .

The winding control system includes a speed detection device 30 that detects the rotational speed of the motor 28, a ratio setting device 32 that sets the speed of the winding motor 28 based on the wire drawing motor 14, and a dancer of a dancer device 38. A displacement detection device 33 that detects the displacement of the roll 38a, a comparison circuit 34 that compares the signals from the speed detection device 30 and the displacement detection device 33, and a drive of the take-up motor 28 is controlled based on the output signal of the comparison circuit. It is composed of a controller 36.

In the control system for the continuous wire drawing apparatus configured as described above, when performing wire drawing work, the time starter unit starts and accelerates the wire drawing motor 14, and also winds the wire at a constant ratio with the time starter unit. The motor 28 is started and accelerated. When the motors 14 and 28 are driven, the four wire drawing rolls 12a to 12d rotate, and the dies 42a to 12d rotate.
The wire rod 24 passing through 42d is drawn. On this occasion,
The wire drawing motor 14 is connected to the winding motor 28 by the controller 22.
are respectively controlled by a controller 36. Further, the dancer device 38 acts to keep the tension of the wire rod 24 constant. Through the above operations, the wire rod 24 is drawn to a predetermined diameter.

[0007]

[Problems to be Solved by the Invention] However, in the conventional control system for continuous wire drawing equipment as described above,
Since one motor 14 drives the four wire drawing rolls 12a to 12d, the electrical and mechanical loads placed on the motor 14 are excessive, and the speed of the wire rod 24 cannot be precisely controlled. This leads to a decline in product quality. In addition, the tension of the wire rod 24 is adjusted by the wire drawing machine 10 and the take-up reel 26.
Since this is performed only by the dancer device 38 between
The fluctuation in the tension of the wire rod 24 within the wire drawing machine 10 depends on the slip of the wire rod 24 itself, and there is a problem that the quality stability of the product is low. Furthermore, since the drive system is controlled by simple closed-loop control, it is not possible to monitor the operating state of the wire drawing machine 10 and centrally control it, making maintenance very difficult.

[0008]

OBJECTS OF THE INVENTION Therefore, it is an object of the present invention to provide a control system for a continuous wire drawing device that can perform wire drawing with high precision. Another object of the present invention is to provide a control system for a continuous wire drawing device that allows easy management of the operating status of the wire drawing device.

[0009]

[Means for Solving the Problems] In order to achieve the above object, the present invention provides continuous wire drawing in which a predetermined long wire is continuously drawn by a plurality of dies while being driven by a plurality of wire drawing rolls. The control system for the apparatus includes a plurality of drive sections that individually drive the plurality of wire drawing rolls, and a plurality of control sections that individually control the plurality of drive sections. Further, a tension adjustment means for adjusting the tension of the wire is installed for each of the plurality of die passes. Further, the plurality of control units are collectively controlled by a predetermined master control unit, and the master control unit monitors the working state of the continuous wire drawing device based on signals supplied from each control unit. It consists of

0010

[Operation] As described above, the present invention independently drives and controls the elongated wire for each wire drawing roll, that is, for each die pass, so electrical and mechanical loads are applied to one motor. is dispersed, and the rotational speed of each drawing roll can be precisely controlled. In addition, since the wire tension is adjusted for each die pass, subtle fluctuations in wire tension can be absorbed in real time, minimizing wire slippage. Furthermore, the plurality of control units are collectively controlled by a predetermined master control unit, and the master control unit monitors the working state of the continuous wire drawing apparatus based on signals supplied from each control unit, It becomes possible to easily analyze the operating status of the wire drawing machine.

[0011]

DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described in detail below with reference to the accompanying drawings. FIG. 1 shows the configuration of a continuous wire drawing apparatus and its control system according to an embodiment. Note that explanations of parts similar to those in the prior art described above will be omitted.

First, before explaining the configuration of the control system according to this embodiment, the configuration of a continuous wire drawing apparatus that employs the control system will be explained. Continuous wire drawing equipment
4, a take-off section 52 that takes over the drawn wire 24, and a winding section 54 that winds up the wire 24 taken off by the take-off section 52. The wire drawing unit 50 includes n dies 42a, 42b to 42n that gradually reduce the diameter of the wire 24 at a predetermined ratio, and wire drawing rolls 12a, 12b to 12 that drive the wire 24 rightward in the figure.
n, wire drawing motors 14a, 14b to 14n that drive these wire drawing rolls 12a to 12n, respectively, and each wire drawing roll 1
It is composed of dancer rolls 56a, 56b to 56n for synchronizing the rotational speeds of the rollers 2a to 12n. The take-off section 52 includes a take-off roll 58 and a take-off motor 60 that drives the take-off roll 58. The winding section 54 includes a winding reel 26 that winds the drawn wire 24, a winding motor 28 that rotationally drives the winding reel 26, and a winding reel 26 that winds the drawn wire rod 24.
and a dancer mechanism 38 that adjusts the tension of the wire 24 before it is wound up. Each of the above motors 14a~
As 14n, 60, and 28, direct current or alternating current servo motors are used.

On the other hand, a control system for driving and controlling the continuous wire drawing apparatus configured as described above includes a wire drawing control section (70a to 70a to 14n for controlling the wire drawing motors 14a to 14n in the wire drawing section 50).
70n, 72a-72n, 74a-74n, 76a-7
6n), a take-up control unit (80, 82, 84) that controls the take-up motor 60 of the take-up unit 52, and a take-up control unit (86, 88, 90,
92), a master CPU 94 that comprehensively controls each of the above control systems, and a monitoring CPU that monitors the operating status of the continuous wire drawing device using data from the master CPU 94.
It is composed of U96.

Wire drawing control section (70a to 70n, 72a to 7
2n, 74a to 74n, 76a to 76n) are motor 1
Drivers 70a to 70n that drive 4a to 14n, respectively
, speed detection devices 72a to 72n that detect the rotational speeds of the motors 14a to 14n, respectively, and drivers 70a to 70.
The CPUs 76a to 76n perform drive control of each of the dancer rolls 56a to 56n, and the rotational speed signals and CPUs of the dancer rolls 56a to 56n.
Feedback circuits 74a-74n compare the control signals from U76a-76n and provide drive signals to drivers 70a-70n. The take-up control unit (80, 82, 84) includes a driver 80 that drives the take-up motor 60, a speed detection device 82 that detects the rotational speed of the take-up motor 60, and a CPU 84 that supplies a control signal to the driver 80. It is configured. Further, the winding control section (86, 88, 90, 92) controls the winding motor 2.
8, a speed detection device 88 that detects the rotational speed of the motor 28, a CPU 92 that supplies a winding control signal, a control signal from the CPU 92, a displacement signal of the dancer roller 38a of the dancer mechanism 38, and a feedback circuit 90 that compares and calculates the values and supplies a drive control signal to the driver 86. As the CPUs 76a to 76n, 84, and 92, a sequencer is optimal in consideration of noise resistance, but a microcomputer or a personal computer may also be used. In addition, the master CPU94
and the CPUs 76a to 76n, 84, and 92 are connected by optical cables in consideration of noise resistance.

In the control system for the continuous wire drawing apparatus configured as described above, the wire drawing machine motors 14a to 14n
, while the take-up motor 60 and the winding motor 28 are driven to perform the wire drawing process, the wire drawing machine motors 14a to 14n, that is, the wire drawing rolls are 12a to 12n are individually controlled. Master CPU9
4 supplies control signals to the CPUs 76a to 76n, 84, and 92, and
The control signal from 6n is fed back to each CPU 76.
Information based on signals input from a to 76n is supplied to the monitoring CPU 96. Then, the monitoring CPU 96 analyzes and monitors the work situation based on the supplied information.

[0016]

[Effects of the Invention] As explained above, in the present invention, since the long wire rod is driven and controlled independently for each die pass, it is possible to accurately control the rotational speed of each wire drawing roll. This significantly improves wire drawing accuracy. In addition, by adjusting the tension of the wire for each of a plurality of die passes, the slip of the wire due to fluctuations in the tension of the wire can be minimized, further improving the quality of the product. Further, by controlling the plurality of control units collectively by the master control unit, the working status of the wire drawing machine can be easily analyzed, and maintenance of the entire continuous wire drawing apparatus can be facilitated.

[Brief explanation of the drawing]

FIG. 1 is an explanatory diagram showing the configuration of a control system for a continuous wire drawing apparatus according to an embodiment.

FIG. 2 is an explanatory diagram showing the configuration of a control system for a conventional continuous wire drawing apparatus.

[Explanation of symbols]

12a-12n Wire drawing rolls 14a-14n
Wire drawing motor 24 Wire rods 42a to 42n Dies 56a to 56n Dancer mechanisms 76a to 76
n CPU 94 Master CPU

Claims (3)

[Claims] 1. A control system for a continuous wire drawing device that drives a long wire rod by a plurality of wire drawing rolls and continuously draws the wire with a plurality of dies, wherein each of the plurality of wire drawing rolls is individually drawn. 1. A control system for a continuous wire drawing apparatus, comprising: a plurality of drive sections that drive; and a plurality of control sections that individually control the plurality of drive sections. 2. The control system for a continuous wire drawing apparatus according to claim 1, further comprising a plurality of tension adjusting means for adjusting the tension of the wire for each of the plurality of die passes. 3. The plurality of control units are collectively controlled by a predetermined master control unit, and the master control unit controls the operation of the wire drawing apparatus based on signals supplied from the plurality of control units. The control system for a continuous wire drawing apparatus according to claim 1 or 2, characterized in that the control system monitors the state.