JPH074618B2 - Continuous wire drawing machine - Google Patents

Description

TECHNICAL FIELD The present invention relates to a continuous wire drawing machine in which a die and a winding material of a wire rod are continuously provided to successively thin the wire rod.

<Prior Art> A continuous wire drawing machine that draws a wire rod and reduces the cross-sectional area into a desired size and shape is composed of a winding body that gives a pulling force to the wire rod, and a die for drawing the wire rod. A required number of the winding bodies and dies are arranged according to the type of wire rod and the finished wire diameter.

Then, the wire rod is given a drawing force by being wound around the winding body, and the cross-sectional area is reduced and the length is increased each time it passes through the die, so that the wire rod drawing speed approaches the finish. Follow and get faster.

Therefore, the winding bodies are operated so that different rotation speeds are set before the work is started in accordance with the drawing speed of the wire rod, and the winding bodies have a consistent drawing speed.

<Problems to be Solved by the Invention> In the above-mentioned conventional technique, the wire rod processing speed of the dies varies due to the difference in the wear amount of the dies combined with the respective winding bodies, and the balance of the drawing speed between the respective winding bodies is balanced. It collapses. If the operation is continued at the speed set at the start of work, the stored dose of the winding body will increase or decrease, and eventually there will be a problem of breaking the wire. It must be monitored and the withdrawal speed adjusted.

Therefore, a technique for automatically controlling the purpose of the winding body according to the stored dose and eliminating the need for monitoring during operation is disclosed in Japanese Utility Model Publication No. 49-37934 (conventional example 1) and Japanese Utility Model Publication No. 49. −379
No. 35 (Prior art example 2).

However, in the above-mentioned conventional example 1, since the rotation of the winding cylinder is controlled so that the stored dose is kept constant, the flow rates of the inlet-side wire drawing and the outlet-side wire drawing become equal, and the winding wires are arranged before and after the winding cylinder. It cannot be applied to the continuous wire drawing machine because it cannot cope with the difference in wire rod processing speed of the die. Further, in the second conventional example, since the start and stop of the drive motor of the winding cylinder is repeated, there is a problem that the wire rod is subjected to excessive tension.

In view of the above, the present invention provides a continuous wire drawing machine capable of continuous unmanned operation for a long time by detecting an increase or decrease in the stored dose of the winding body and controlling a drawing speed from the winding body. To aim.

<Means for Solving the Problem> The problem solving means according to the present invention is as shown in FIGS.
A winding body 1 for winding the wire W, and a support shaft on the winding body 1
A feeding arm 2 rotatably supported by 36 depending on a change in tension of the wire, a wire feeding roller rotatably supported at the tip of the feeding arm 2, and a wire wound from the winding body 1 by the roller. A die 3 for drawing the drawn wire W, and a plurality of the winding bodies 1 and the dies 3 are continuously provided,
In the continuous wire drawing machine that sequentially supplies the wire rod W, the feeding arm 2 that is symmetrically projected about the support shaft 36.
The rollers 33, 34 and the deflecting body 35 arranged on the tip side of the rollers 33, 34 are provided at both ends of the die 3, and the positional deviation in the rotational direction of the feeding arm 2 caused by the fluctuation of the wire rod machining speed of the die 3 is caused. The position detectors 46a and 46b for detecting the position are provided so as to face the swinging body 35, and the position detectors 46a and 46b are synchronized with the wire rod processing speed of the die 3 so as to eliminate the positional deviation of the feeding arm 2. A control device 8 for controlling the speed of withdrawal from the winding body 1 each time there is an output is provided. The control device 8 determines the rotation direction of the feeding arm 2 based on the outputs from the position detectors 46a, 46b. Means 9, counting means 10 for counting the number of outputs of the position detectors 46a, 46b, computing means 11 for computing a correction value of the withdrawal speed based on the outputs from the discrimination means 9 and the counting means 10, and the computing means 11 To the drive unit 12 of the winding body 1 based on the calculated value from And a command means 13 for outputting the drive signal.

<Operation> In the above problem solving means, when the drawing speed of the wire W is synchronized with the wire processing speed, as shown in FIG. 4, the drawing arm 2 maintains a constant position with respect to the drawing position of the wire W. is there.

Here, when the wire rod processing amount of the winding body 1 with respect to the next winding body 1 increases due to wear of the die 3, for example, the storage amount of the winding body 1 increases and the feeding position of the wire rod W is It moves in the same direction as the rotation direction of 1. That is, the feeding arm 2 rotates in the same direction as the winding body 1 by reducing the tension of the wire W as shown in FIG. 5, and the wire W when the drawing speed of the wire W is synchronized with the wire processing speed. The feeding arm 2 is displaced from a certain position corresponding to the feeding position, that is, the position is displaced. At this time, the swinging body 35 moves the position detector 46.
By passing in front of a and 46b, the positional deviation of the feeding arm 2 with respect to the winding body 1 is detected. Then, the discriminating means 9 discriminates the rotation direction of the feeding arm 2 from the outputs of the position detectors 46a and 46b. In addition, the output means counts the counting means 10
Count with. Then, the calculation means 11 determines whether the rotational speed of the drive device 12 of the winding body 1 is increased or decreased based on the output from the determination means 9.

In this case, since the drawing speed of the wire W from the winding body 1 is faster than the rotation speed of the next winding body 1, the rotation speed of the drive device 12 relative to the winding body 1 is reduced. Further, the reduction amount of the rotation speed is calculated based on the output from the counting means 10. The calculation result of the calculation unit 11 is output to the command unit 13, and the drive signal corrected by the command unit 13 to reduce the rotation speed is output by the drive unit 12.

On the contrary, when the wire rod processing speed of the winding body 1 becomes slow, the winding body 1
The amount of stored energy is reduced, the positional deviation of the feeding arm 2 is detected by the position detectors 46a and 46b, and the control device 8 controls to increase the rotation speed of the winding body 1.

By the control as described above, the drawing speed of the wire W and the wire processing speed finally match, the feeding position of the wire W becomes constant, and the positional deviation of the feeding arm 2 is eliminated, and the winding body 1 is removed. It will be stationary at a fixed position.

Therefore, even if the drawing amount balance between the winding bodies 1 is lost due to a slight difference in die setting between the winding bodies or a change in the wear of the dies 3, the rotation speed of the winding body 1 is automatically adjusted. By controlling, it is possible to balance the processing amount of the wire rod, the wire drawing speed of the wire rod W is stable, monitoring during operation is not necessary, and continuous operation for a long time can be enabled.

<Example> Hereinafter, an example of the present invention will be described with reference to the drawings. FIG. 1 is a control block diagram of a control device showing an embodiment of the present invention, FIG. 2 is a schematic diagram of a continuous wire drawing machine, and FIG. 3 is a partially cutaway side view of a winding body and a payout arm. 4 is a plan view of the position detecting device, FIG. 5 is a diagram showing the relationship between the feeding arm and the position detecting device when the drawing speed is increased, and FIG. 6 is a drawing arm and position when the drawing speed is decreased. It is a figure which shows the relationship with a detection apparatus.

As shown in FIG. 2, the continuous wire drawing machine of the present embodiment has a winding body 1 for winding a wire W, a feeding arm 2 rotatably supported on an upper portion of the winding body 1, and a feeding arm 2. A plurality of units 4 each including a die 3 for drawing the wire W unwound from the winding body 1 by means of the required number of dies are connected in series, and the wire W supplied from the wire feeder is wound. By drawing the wire W by drawing it with the body 1a, the wire 3 is drawn with the die 3a, wound with the next adjacent winding body 1b, and drawn with the next die 3b. The above operation is repeated in order. Then, the finishing machine 5 takes it out.

Then, a position detection device 7 for detecting a positional deviation in the rotation direction of the feeding arm 2 caused by a change in the wire rod machining speed of the die 3 and a wire drawing machine main body 6 are fed in synchronization with the wire rod machining speed of the die 3. A control device 8 for controlling the drawing speed from the winding body 1 based on the output from the position detection device 7 so as to eliminate the positional deviation of the arm 2 is provided, and the control device 8 controls the position detection device 7 from the position detection device 7. Discriminating means 9 for discriminating the rotation direction of the feeding arm 2 based on the output of the above, a counting means 10 for counting the number of outputs of the position detecting device 7, and the discriminating means 9
And a calculating means 11 for calculating a correction value of the drawing speed by the output of the counting means 10, and a command means 13 for outputting a drive signal to the drive device 12 of the winding body 1 based on the calculated value from the calculating means 11. Is equipped with.

As shown in FIGS. 2 and 3, the winding body 1 is a cylinder in which the upper surface of the wire drawing machine main body 6 is rotatably supported by a drive shaft (not shown). Is installed, and the winding body 1 is rotationally driven by the drive device 12 via a drive shaft. The drive device 12 is provided for each winding body 1.

The lower part of the winding body 1 is a winding part 20 for temporarily winding the wire W delivered from the die 3, and the upper part thereof is a storage part 21 for storing the wire W, and the winding part 20. A collar portion 22 is provided at the bottom of the. The storage wire portion 21 has a larger diameter than the winding portion 20 and is formed so as to be inclined so as to have a smaller diameter toward the upper side. A flange 23 is fitted on the upper surface of the storage line portion 21.

The feeding arm 2 has a pair of support rods 31 and 32 projecting from a circular plate 30 having a central hole 30a so that the center thereof is symmetrical, and rollers 33 and 34 are rotatably fitted on the support rods 31 and 32, respectively. It is supported. An arcuate deflector 35 is screwed to both ends of the support rods 31 and 32.

Then, the flange 2 of the winding body 1 is inserted into the center hole 30a of the disc 30.
A support shaft 36 inserted into and supported by 3 is fitted through a bearing 37, and is rotatable with respect to the winding body 1. Also, the disc 30
A donut-shaped brake disk 38 is provided on the upper surface of the brake disk 39, and a brake pad 39 is externally fitted and fixed to the support shaft 36 so as to sandwich the brake disk 38, and the brake pad 39 is screwed to the upper end of the support shaft 36. A compression spring 40 is interposed between the combined stop piece 36a, and when the tension of the wire W changes according to the change of the drawing speed of the wire W by this brake mechanism, the feeding arm 2 is rotated differentially. ing.

The die 3 is fixed to the wire drawing machine body 6 at a height facing the lower part of the wire storage portion 21 of the winding body 1, and the wire W is fed from the winding portion 20 to the die 3 in the vicinity of the die 3. A turn roller 41 for guiding to is provided. Further, an intermediate die 42 is provided at a height facing the lower part of the winding section 20, and a guide roller 43 for guiding the wire W supplied from the winding body 1 on the upstream side in the wire rod advancing direction to the intermediate die 42 is arranged in parallel. Has been done.

A guide roller 44 for guiding the wire rod W unwound from one of the rollers 33, 34 of the unwinding arm 2 to the next winding body 1 is provided on the wire drawing machine body 6 above each winding body 1. It is rotatably supported by the supported support column 45.

As shown in FIG. 4, the position detecting device 7 comprises a swing body 35 attached to the feeding arm 2 and a pair of proximity switches 46a and 46b arranged so as to face the arc portion of the swing body 35. . The proximity switches 46a, 46b are fixed to a safety cover 47 arranged on the upper surface of the wire drawing machine body 6 in the vicinity of the winding body 1.

As shown in FIG. 1, the control device 8 controls each winding body 1 of the wire W.
Switch 50 for specifying wire rod processing conditions to input the die diameter of
A die speed command switch 51 for inputting a finished linear velocity as a reference speed of each winding body 1 and a reference speed calculator 52 for calculating a reference drawing speed of each winding body 1 by a value input from the switch 51. Therefore, the rotation speed of each winding body 1 is determined according to the wire rod processing speed of each die 3.

Then, the direction discriminator 9a as the discriminating means 9 for discriminating the rotation direction of the feeding arm 2 by turning on / off the proximity switches 46a, 46b of the position detecting device 7, and the counting means 10 for counting the number of times the proximity switches 46a, 46b are turned on / off. As a counter
10a, a correction value calculator 11a as a calculation means 11 for calculating a correction amount of the drawing speed of the wire W by proportionally and integral controlling the values from the direction discriminator 9a and the counter 10a, and a reference speed calculator 52. Compensation value calculator 11
Driving device 1 for winding body 1 by adding / subtracting the correction amount calculated in a
An adder 13a as command means 13 for outputting the command speed corrected to 2 is provided.

In the direction discriminator 9a, when the drawing speed of the wire rod W of the winding body 1b becomes slower than the wire rod machining speed of the winding body 1a and the supply amount of the wire rod W increases, the feeding arm 2 is moved to the feeding arm 2 as shown in FIG. When the proximity switch 46a is turned on, the proximity switch 46b is turned off from the fact that the swing body 35 of the feeding arm 2 is rotated in the same direction as the rotation direction A of the winding body 1 by rotating in the direction of arrow B. Will be detected.

Alternatively, as shown in FIG. 6, the drawing speed of the wire W of the winding body 1b becomes faster than the wire processing speed of the winding body 1a, and the tension at the time of unwinding the wire W from the unwinding arm 2 becomes weaker.
The rotation of the swinging body 35 of the feeding arm 2 in the direction indicated by the arrow C is detected by turning the proximity switch 46b from OFF to ON when the proximity switch 46a is ON.

In the above structure, the wire W supplied from the wire supply device
After passing through the intermediate die 42 and being wound up by the winding portion 20 of the winding body 1a, it is guided to the die 3a by the turn roller 41 and drawn. The wire W is rewound on the storage wire portion 21 of the winding body 1a and unwound by the roller 33 of the unwinding arm 2,
It is guided to the next intermediate die 42 via the upper guide roller 44 and the guide roller 43, and is wound around the winding body 1b. Then, the wire W is sequentially drawn and finished through the above path, and taken out from the finishing machine 5.

At this time, each winding body 1 from the switch 50 for designating wire rod processing conditions
When the finishing linear velocity is set by the die diameter and the die speed command switch 51, the reference drawing speed is calculated by the reference speed calculator 52 and is output to the drive unit 12 of the winding body 1 to wind the wire W. Further, the feeding arm 2 is stationary due to the balance between the frictional force of the brake and the tension of the wire W.

That is, when the drawing speed of the wire W is synchronized with the wire processing speed, the payout arm 2 maintains a constant position with respect to the payout position of the wire W, as shown in FIG.

Here, when the wire rod processing amount of the winding body 1a with respect to the next winding body 1b increases due to an error in the set hole diameter of the die 3 or wear of the die 3, the drawing speed of the wire rod W becomes smaller than the reference drawing speed. . Then, the storage amount of the winding body 1a increases, and the feeding position of the wire W moves in the same direction as the rotating direction of the winding body 1, so that the feeding arm 2 moves the wire rod as shown in FIG. Due to the decrease in the tension of W, the winding body 1 rotates in the same direction.

At this time, the proximity switch 46a is turned on and the proximity switch 46b is turned from on to off, and the discriminating means 9 discriminates the rotation direction of the feeding arm 2. In addition, this proximity switch 46a, 46b
The number of times of turning on and off is counted by the counting means 10.

Then, the calculation means 11 determines whether the rotational speed of the drive device 12 of the winding body 1 is increased or decreased based on the output from the determination means 9. In this case, the winding body is rotated with respect to the rotation speed of the next winding body 1b.
Since the drawing speed of the wire W from 1a is high, the rotation speed of the drive device 12 is reduced. Further, the reduction amount of the rotation speed is calculated based on the output from the counting means 10.

The calculation result of the calculation means 11 is output to the command means 13, the calculated value is reduced to the reference drawing speed from the reference speed calculator 52, and the drive signal corrected to the drive device 12 by the command means 13 is obtained. Is output.

Then, the rotation speed of the winding body 1 is slowed down by the driving device 12, and the amount of the wire rod W to be fed out is increased.
Since the tension of the wire W that is applied to the winding wire increases, the feeding arm 2 rotates in the direction opposite to the rotation method of the winding body 1.

Then, the drawing speed of the wire rod W and the wire rod processing speed are synchronized again, the feeding device for the wire rod W becomes constant, the feeding arm 2 is also maintained at a constant position, and the wire rod W is fed out.

Conversely, when the wire rod processing speed of the winding body 1a becomes slow, the drawing speed of the wire rod W becomes higher than the reference drawing speed, and the wire rod W
Your savings will decrease. Then, the tension of the wire rod W increases, and the feeding position of the wire rod W moves in the direction opposite to the rotation direction of the winding body 1a, and the feeding arm 2 moves toward the winding body 1a as shown in FIG. Rotates in the opposite direction of rotation. At this time,
The proximity switch 46a is turned on and the proximity switch 46b is turned on from off, the discriminating means 9 discriminates the rotation direction of the feeding arm 2, and the counting means 10 counts the number of times the proximity switches 46a and 46b are turned on and off.

Based on these outputs, the calculation means 11 calculates a value to be corrected and outputs it to the command means 13 so as to increase the rotation speed of the winding body 1a. The command means 13 adds the correction amount from the reference drawing speed and outputs the corrected drive signal to the drive device 12.

Then, the rotation speed of the winding body 1a is increased, the amount of winding into the winding body 1a is gradually increased, and the stored dose is increased. Eventually, the drawing speed of the wire W and the wire processing speed match, and the pay-out position of the wire W remains stationary at a fixed position with respect to the winding body 1 without the rotational displacement of the pay-out arm 2.

Therefore, even if the drawing amount balance between the winding bodies 1 is lost due to minute differences in the die hole diameter setting between the winding bodies and wear of the dies 3, the rotation speed of the winding body 1 is automatically controlled. By balancing the drawing speed, it is possible to balance the wire processing amount, stabilize the wire drawing speed of the wire W, and eliminate the need for monitoring during operation.
It is possible to enable continuous operation for a long time.

It should be noted that the present invention is not limited to the above embodiments, and it goes without saying that many modifications and changes can be made to the above embodiments within the scope of the present invention.

The control performed by the control device 8 may be performed using a micro computer.

Also, instead of calculating the reference speed by inputting from the wire rod processing condition designation switch 50 and the die speed command switch 51,
The control device of the present invention may be applied to a continuous wire drawing machine that sets a reference speed by adjusting the rotation speed according to the die diameter of each winding body with respect to the finishing linear speed in the finishing machine.

<Effects of the Invention> As is apparent from the above description, according to the present invention, in a continuous wire drawing machine in which a plurality of winding bodies and dies are continuously provided and wire rods are sequentially supplied, a support shaft is used as a center. A roller is provided at both ends of the feeding arm that is symmetrically projected, and a swing body is provided on the tip side of the roller, and a position for detecting a positional deviation in the rotation direction of the feeding arm caused by a change in the wire rod machining speed of the die is detected. A detector is provided so as to face the swinging body, a discriminating means for discriminating the rotation direction of the feeding arm based on the output from the position detector, a counting means for counting the number of outputs of the position detector, the discriminating means and the counting means. And a command means for outputting a drive signal to the drive unit of the winding body based on the calculated value from the calculating means, and a wire rod processing speed for the die. tuning Each time the output from the position detector is output so as to eliminate the positional deviation of the feeding arm, the drawing speed from the winding body is controlled.Therefore, the amount of wire processing changes due to minute differences in the die diameter and die wear. As a result, when the balance of the withdrawal amount between the winding bodies is lost, the rotational speed of the winding body can be immediately controlled to balance the withdrawing speed. Therefore, it is possible to automatically and quickly follow changes in the amount of wire processing of each winding body, stabilize wire processing, and eliminate the need for monitoring during operation, enabling long-term continuous operation. Can be

Moreover, when the swinging body is provided at both ends of the operation arm, the rotation of the operation arm can be detected at a shorter interval than in the case where it is provided on only one side, and a sudden imbalance in the withdrawal amount can be prevented. Even if it is possible to follow, the drive control of the winding body can be performed before excessive tension is applied to the wire rod, and the feeding arm is symmetrical with respect to the support axis, so that unbalance during rotation does not occur and winding It does not have any adverse effect on the body.
As described above, it is very advantageous to provide a continuous wire drawing machine capable of accurately and reliably drawing a wire rod.

[Brief description of drawings]

FIG. 1 is a control block diagram of a control device showing an embodiment of the present invention, FIG. 2 is a schematic diagram of a continuous wire drawing machine, and FIG. 3 is a partially cutaway side view of a winding body and a payout arm. FIG. 4 is a plan view of the position detecting device, and FIG. 5 is a diagram showing a relationship between the feeding arm and the position detecting device when the drawing speed is increased,
FIG. 6 is a diagram showing the relationship between the feeding arm and the position detecting device when the drawing speed is reduced. 1: winding body, 2: feeding arm, 3: die, 7: position detection device,
8: control device, 9: discriminating means, 10: counting means, 11: computing means,
12: drive device, 13: command means, W: wire rod.

Claims (1)

[Claims] 1. A winding body for winding a wire rod, a feeding arm rotatably supported on an upper portion of the winding body via a support shaft in accordance with a change in tension of the wire rod, and a tip end of the feeding arm. A wire rod feeding roller which is freely supported and a die for drawing the wire rod fed from the winding body by the roller are provided. The winding body and a plurality of dies are arranged in series, and the wire rods are sequentially supplied. In the continuous wire drawing machine, the rollers and the deflecting body arranged on the tip side of the rollers are provided at both ends of the feeding arm symmetrically projected around the support shaft, A position detector for detecting a positional deviation in the rotation direction of the feeding arm caused by a change in the wire rod processing speed is provided so as to face the runout body, and the positional deviation of the feeding arm is eliminated in synchronization with the wire rod processing speed of the die. From the position detector A control device for controlling the speed of withdrawal from the winding body each time a force is applied is provided, and the control device determines the rotation direction of the feeding arm based on the output from the position detector, and the position detector. Counting means for counting the number of outputs of the drawing means, and calculating means for calculating the correction value of the drawing speed by the outputs from the judging means and the counting means,
A continuous wire drawing machine comprising: a command unit that outputs a drive signal to a drive unit for the winding body based on a calculated value from the calculation unit.