JPH05253618A - Uncoiler for wire rod coil - Google Patents

Abstract

PURPOSE:To reduce a frequency of breaking a wire rod at the time of uncoiling the wire rod or a flux cored wire at a high speed. CONSTITUTION:A friction brake material 14 to brake the rotation of a turntable 9 mounted with a wire rod coil 12, a speed detector 26 to detect the drawing speed of the wire rod 13 and a brake control means 18B which increases braking force of a friction brake material 14 to be given to the turntable 9 with the increase of the drawing speed by the start of draw out drive of the wire rod 13 and increases the braking force further in response with the stop of draw out drive of the wire rod 13 are provided. Consequently, though the draw out speed is raised, or though the wire rod easy to break such as a welding wire of flux cored wire is applied frequency of breaking is greatly lowered and a high speed uncoiling can be carried out.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a rewinding device for a wire rod coil, and particularly, although not intended to be limited to this, it is used in a step of processing a large diameter wire for welding into a small diameter wire by wire drawing. , A rewinding device for wire rod coils.

[0002]

2. Description of the Related Art For example, in processing a welding wire into a small diameter wire, a wire rod coil formed by winding a large diameter wire as shown in FIG.
The wire 93 is hung from the wire rod coil 91 and drawn out from the wire rod coil by the wire drawing machine 95 through the rust removal device 94 to be thinned, and the coiled wire is wound around the wire rod coil 98 by the coiler 96. In the wire drawing machine 95, the wire is guided by a guide roller, then passed through a die and wound around a capstan, and the wire is diametrically drawn by rotationally driving the capstan by an electric motor. A coiler 96 imparts a coil-like curl to the reduced-diameter wire, which causes the wire to have a circular loop shape and is dropped onto the lower flange portion of the coil supporting inner frame 81 to form the wire coil 98. Become.

If the large-diameter wire before wire drawing is a simple wire rod, that is, a rod-shaped (solid) wire, and the wire drawing speed, that is, the speed of drawing the wire from the wire coil (drawing speed), is low, The pulling tension causes the wire to open from the circular loop shape and extend linearly. When the drawing speed fluctuates, when decelerating, particularly when the wire drawing machine 95 is stopped, an excessive amount of wire is unwound from the wire rod coil to a certain extent, but the force to bend or bend the wire has a small radius. On the other hand, because the wire is strong and does not bend or bend in a small radius, the wire also extends straight from the circular loop with increasing speed or restart of the wire drawing machine 95. Therefore, the wire is hardly entangled or bent or bent in a small radius between the rewinding table 90 and the rust remover 94.

[0004]

However, in the case where the drawing speed is relatively high with respect to the wire diameter, or in the case of a flux-cored wire in which the inner space of the hollow tube is filled with flux, deceleration or extension occurs. It is often the case that the excess wire that comes out when the wire machine 95 is stopped breaks relatively easily. In particular, in the case of a flux-cored wire, when the wire was pulled straight from the circular loop, the circular loop did not open toward the straight line due to wire entanglement, etc., and the loop was downsized and the twist was concentrated at one location. At this time, the wire is easily broken by bending or breaking a small radius. Such a phenomenon appears more frequently as the wire drawing speed is increased, which makes it impossible to increase the wire drawing speed and lowers the productivity of the wire drawing treatment.

It is an object of the present invention to provide a wire rod coil rewinding device which can increase the drawing speed of the wire rod from the wire rod coil without increasing the breakage frequency of the wire rod exceptionally.

[0006]

The rewinding device of the present invention comprises:
Rotation table (9) on which wire rod coil (12) is mounted; Support member (4) for rotatably supporting the rotation table (9); Friction brake material for braking rotation of the rotation table (9) (14); the friction brake material
Driving means (16, 17, 18A) for braking driving (14); Rewinding drive device (6) for pulling out and driving the wire rod (13) of the wire rod coil (12)
Speed detection means (2) for detecting the pulling speed of the wire rod (13)
6); and, via the drive means (16, 17, 18A), as the pulling speed increases due to the start of pulling drive of the wire rod (13) by the rewinding drive device (60), the rotary table ( Braking control for increasing the braking force of the frictional brake material (14) given to (9) and further increasing the braking force in response to the stop of the drawing-out drive of the wire rod (13) by the rewinding drive device (60). Means (18B);

Symbols in parentheses indicate corresponding elements in the embodiments shown in the drawings and described later.

[0008]

The braking control means (18B) gives the frictional brake material to the rotary table (9) as the wire drawing speed increases due to the start of the drawing operation of the wire (13) by the rewinding drive device (60) ( Since the braking force of 14) is increased, a higher tensile tension acts on the wire as the wire drawing speed becomes higher, and a stronger linear force is applied to the wire as the wire becomes faster, so the wire is unwound from the rewinding device. Since the wire rod is straightened at an early stage, it is difficult for the wire rod to be fed out to be entangled. In addition, if there is speed fluctuation, the rotating base
(9) and due to the motion inertia of the wire rod coil, the wire rod feeding speed generally exceeds the wire rod drawing speed, resulting in an excessive amount of wire feeding.
Since it acts on (9), the feeding speed of the wire due to the motion inertia of the turntable (9) and the wire coil is decelerated at an early stage, and the wire feeding amount is extremely small. Hard to get tangled.

When the rewinding drive device (60) is stopped, the braking control means (18B) further increases the braking force in response to this, so that the rotation of the rotary base (9) is decelerated quickly and the rotary base (9) ) And the wire rod feeding speed due to the motion inertia of the wire rod coil decelerates early, the wire rod feeding excess amount is small, and the fed wire rod is not easily entangled.

Therefore, according to the present invention, even if the drawing speed of the wire rod from the wire rod coil is increased, and even if the wire rod is relatively easily bent and broken, such as a flux-cored welding wire, the breakage frequency of the wire rod is extremely high. It becomes low, and relatively fast rewinding can be performed.

Other objects and features of the present invention will become apparent from the following description of embodiments with reference to the drawings.

[0012]

1 shows a rewinding device 40 which is an embodiment of the present invention. In this example, a coil support inner frame 11 having a wire rod coil 12 formed by winding a flux-containing large-diameter wire 13 is placed on a turntable 9. Flux-containing large-diameter wire 1 drawn from wire rod coil 12
3 is drawn by the wire drawing machine 60 through the rust remover 50.
The rust remover 50 removes rust on the surface of the wire 13 by mechanical polishing. In the wire drawing machine 60, the wire 13
Is first wound around the guide roller 61 and then the die 62
And wound on a capstan 63, then hung on a guide roller 64 and electrically driven by the capstan 63 to be diced into a thin flux welding wire. This thin wire is given a circular loop-shaped curl by the coiler 70 and dropped on the lower flange of the coil support inner frame 81 to form a flux-cored welding wire coil 82.

FIG. 2 shows a side surface of a mechanism around the turntable 9 of the rewinding device 40, FIG. 3 shows an upper surface of the turntable 9, and FIG.
FIG. 5 shows a lower mechanism that supports the turntable 9, and FIG. 5 shows a mechanism that rotatably supports the turntable 9 about a vertical axis. Referring to these drawings, four roller columns 2a to 2d are erected on a base 1 installed on the floor, and the roller columns 3a to 2d are attached to the upper ends of the roller columns 2a to 2d. 3b is rotatably supported, and a turntable 9 is mounted on these rollers 3a to 3b.

The turntable 9 has coil locks 10a, 10
b is rotatably mounted about 90 degrees. Pins 10c and 10d (FIG. 3) for positioning the lower flange frame body of the coil support inner frame 11 equipped with the wire rod coil 12 around which the large diameter wire 13 with flux is wound are mounted on the rotary table 9.
Is set up. By arranging the lower flange frame body of the coil support inner frame 11 on the outside of these pins, the lower flange frame body is located between the rotation shafts of the coil locks 10a and 10b. By rotating the coil locks 10a and 10b by about 90 degrees and turning them over the lower flange frame and tightening the captive screw, the coil support inner frame 12 is rotated by the rotary table 9
Then, it is fixed while being aligned with the center thereof (FIG. 3). That is, the wire rod coil 12 has its center line located on the turntable 9
It is fixed to the turntable 9 in a state of being aligned with the center line of.

A brake drum 5 is provided at the center of the turntable 9.
(Fig. 5) is fixed, and this brake drum 5 is
A central pillar 4 standing on the base 1 penetrates through it. Between the brake drum 5 and the center column 4, there are bearings 6-8,
As a result, the brake drum 5 is rotatable around the central column 4.

A brake belt 14 having a friction material on its inner surface is wound around the outer peripheral surface of the brake drum 5 for about half a circumference. One end of the brake belt 14 is fixed to a base 1 via a fixing member 15. Is fixed to the piston rod 1 at the other end.
It is connected to the tip of 6. The piston in the air-cylinder 17 is fixed to the rear end of the piston rod 16. The air supply device 18A (Fig. 1) is the air cylinder 1.
When high pressure air is supplied to 7, the piston rod 16 (Fig. 2) is drawn toward the inside of the air cylinder 17,
As a result, the inner surface of the brake belt 14 strongly abuts the outer surface of the brake drum 5, whereby a strong braking force acts on the rotary table 9. This braking force is controlled by the braking control device 18B connected to the air supply device 18A (FIG. 1).

The braking controller 18B includes a wire drawing machine 60 (FIG. 1) for each rotation of the capstan 63 at a predetermined small angle.
Pulse speed synchronization pulse Sp and drive (on / off) of an electric motor (not shown) that drives the shapstan 63 to rotate.
A signal Sd indicating (OFF) is given.

FIG. 6 shows the construction of the air supply device 18A and the braking control device 18B. An electromagnetic switching valve 19 is inserted between the piston drive space of the air-cylinder 17 and the air outlet (high pressure) of the air-compressor 20, and the electromagnetic switching valve 19 is energized while it is energized. The piston drive space of 17 is connected to the air outlet of the air-compressor 20, but when not energized, the air-cylinder 1
The piston drive space of 7 is released to the atmosphere (low pressure). The air-compressor 20 is driven by an electric motor 21. An orifice open to the atmosphere is connected to the air outlet of the air-compressor 20.
Excessive pressure rise at the nausea of the
To prevent overload of the switch 21.

The pressure of the air-cylinder 17 (which corresponds to the braking force) is detected by the pressure sensor 24, and the signal processing circuit 25 converts the pressure signal of the pressure sensor 24 into the current braking force signal (analog). To the comparator 28. Wire drawing machine 6
The velocity synchronizing pulse Sp given by 0 is given to the F / V converter 26 and the retrigger monomultivibrator 30. F /
The V converter 26 converts the speed synchronizing pulse Sp into a speed signal (analog) and gives it to the amplifier 27. The amplifier 27 converts the speed signal into a target braking force signal (analog) indicating the required braking force corresponding to the speed indicated by the amplifier 27 and supplies the target braking force signal (analog) to the comparator 28.

When the level of the target braking force signal is equal to or higher than the level of the current braking force signal, the comparator 28 gives a high level H energization control signal for instructing energization (brake force up) to the solenoid driver 29, and the target. When the level of the braking force signal is less than the level of the current braking force signal, de-energized (braking force down)
A low level L energization control signal for instructing is supplied to the solenoid driver 29.

The re-trigger monomultivibrator 30 is
It is a timer that performs a time period of Td = 2 seconds, and its output is L in the standby state, but outputs H while the timer is triggered and the timed operation (counting elapsed time) is being performed.
If it is triggered again during the timed operation, the timed operation of Td is restarted from there and the H output is continued. If the trigger signal does not enter within Td from the trigger, the output becomes L when the time Td has elapsed and the time is over. The re-trigger mono-multivibrator 30 is supplied with the speed synchronization pulse Sp as a trigger signal. The speed synchronization pulse Sp is one pulse generated for each rotation of the capstan 63 of the wire drawing machine 60 by a predetermined small angle, and the period of the speed synchronization pulse Sp when the rotation of the capstan 63 is considered to be substantially stopped. Is less than Td = 2 seconds, so the output L of the retrigger monomultivibrator 30 is
The capstan 63 for pulling out the wire 13 from the coil 12 (FIG. 1) is substantially stopped, and the output H of the retrigger monomultivibrator 30 is
3 indicates that it is substantially rotating.

The output of the re-trigger mono-multivibrator 30 and an on / off signal Sd (representing energization (on) / non-energization (off) of an electric motor (not shown) for rotationally driving the capstan 63). An inverted signal of H when turned on / L when turned off (L when turned on / H when turned off) is given to the AND gate 31. And Gate 31 is therefore capstan 6
When the electric motor for rotating 3 is energized (turned on), the output of L is given to the oaget 23 and the relay driver 32. When the electric motor that rotationally drives the capstan 63 is de-energized (OFF) and is switched from energized to de-energized, the AND gate 31 outputs the output H when the capstan 63 is rotating. Capstan 63
When is stopped, the output of L is given to the ogate 31 and the relay driver 32.

Therefore, the Ogate 23 has Sd = H
When (the electric motor that rotationally drives the capstan 63 is energized) and when Sd = L (the electric motor that rotationally drives the capstan 63 is non-energized), and 30
When the output of H is H (the capstan 63 is rotating), the output of H is given to the motor driver 22, which causes the electric motor.
The rotor 21 rotates and the air-compressor 20 supplies high-pressure air to the electromagnetic switching valve 19. That is, the air-compressor 20 is driven not only when Sd = H (while the electric motor that rotationally drives the capstan 63 is energized), of course S.
Even when d = L (the electric motor that rotationally drives the capstan 63 is not energized), the air-compressor 20 is driven while the capstan 63 is rotating.

FIG. 7 shows electric signals of respective parts of the electric circuit shown in FIG. The operation of the electric circuit shown in FIG. 7 will be described with reference to this. When the on / off signal Sd provided by the wire drawing machine 60 is at a low level L (capstan driving motor stopped) and the capstan is stopped and the speed synchronizing pulse Sp has not arrived, the motor 21 Is de-energized, the air-compressor 20 is stopped, the pressure in the piston drive chamber of the air-cylinder 17 is atmospheric pressure, and the piston rod 16 applies a substantial pulling force to the brake belt 14. Not not. Therefore, the braking force applied to the brake drum 5 is substantially zero.

When the wire drawing machine 60 operates, the on / off signal Sd becomes high level H, and the speed synchronizing pulse Sp starts to arrive and its cycle becomes shorter as the speed of the capstan increases. When the on / off signal Sd becomes the high level H, the output of the AND gate 31 of the braking control device 18 becomes the low level L, and the output of the oagage 23 becomes the high level H, and in response to this H, the mode is changed. The electric driver 21 energizes the electric motor 21, which drives the air-compressor 20 to increase the pressure at its outlet.

On the other hand, as the speed of the capstan 63 of the wire drawing machine 60 increases, the speed signal level of the F / V converter 26 increases and the output of the comparator 28 becomes H, so that the solenoid driver 2
9 energizes the electromagnetic switching valve 19, whereby the piston driving chamber of the air cylinder 17 communicates with the discharge port of the air compressor 20, and the pressure in the piston driving chamber starts to rise. That is, tensile force starts to be applied to the break belt 14. This pressure is detected by the pressure sensor 24, converted into a current braking force signal by the signal processing circuit 25, and fed to the comparator 28.
Will be driven back.

The signal processing circuit 25 outputs the target braking force signal corresponding to the wire 13 pulling speed Vw output from the amplifier 27.
When the current braking force signal given by is increased, the output of the comparator 28 becomes L, and the energization of the electromagnetic switching valve 19 is stopped. As a result, the pressure in the piston drive chamber of the air-cylinder 17 begins to escape to the atmosphere, and the pressure detected by the pressure sensor 24 decreases. Then,
The current braking force signal provided by the signal processing circuit 25 is supplied to the amplifier 27.
Becomes lower than the target braking force signal corresponding to the wire 13 pulling speed Vw, and the output of the comparator 28 becomes H,
The solenoid driver 29 energizes the electromagnetic switching valve 19, whereby the air discharge port of the air-compressor 20 communicates with the piston drive chamber of the air cylinder 17, and the pressure in the piston drive chamber rises. By such an operation, the pressure in the piston drive chamber of the air-cylinder 17, that is, the current braking force,
The electromagnetic switching valve 19 is switched so that the target braking force indicated by the amplifier 27 corresponding to the wire pulling speed represented by the speed synchronization pulse Sp is matched, and the current braking force substantially matches the target braking force.

As shown in FIG. 7, as the drawing speed Vw of the capstan 60 increases, the target braking force increases and the current braking force accordingly increases. When the drawing speed Vw reaches a substantially constant constant speed control speed, the braking force (air-cylinder pressure Bp) also becomes substantially constant in conjunction with it.

The capstan drive motor is stopped by the wire drawing machine 60, and the on / off signal Sd becomes L (capstan drive motor).
When the capstan 63 is rotating, the output of the mono-multivibrator 30 is H, and the output of the AND gate 31 is switched from L to H. 23 continues H output, and the drive of the air-compressor 20 continues. On the other hand, in response to the output of the AND gate 31 being switched from L to H, the relay driver 32 is inserted between the output of the signal processing circuit 25 (current braking force signal) and the equipment ground. The coil for switching the normally open relay to the closed state is energized, whereby the contact piece of the relay is closed and the current braking force signal is forcibly corrected to a level indicating zero. As a result, while the capstan 63 rotates and the speed synchronization pulse Sp arrives at a period of Td = less than 2 seconds, the output of the comparator 28 is maintained at H, and the solenoid driver 29.
Continuously energizes the electric coil of the electromagnetic on-off valve 19, and the electromagnetic on-off valve 19 continuously supplies the high pressure at the discharge port of the air-compressor 20 to the air-cylinder 17. As a result, the pressure of the air-cylinder 17 rises at a relatively high rising speed, and the braking force of the turntable 9 rises at the rising speed. As a result, the inertial rotation of the turntable 9 and the wire rod coil on the turntable 9 is rapidly braked, and the rotation speed of the turntable 9 is rapidly reduced.

When the capstan 63 is substantially stopped, the speed synchronizing pulse Sp does not arrive, the output of the retrigger monomultivibrator 30 is switched from H to L, and the output of the AND gate 31 is switched from H to L. Replace. At this time, since the on / off signal Sd is L (capstan drive stopped), the output of the oaget 23 shifts from H to L, and the motor driver 22 stops energizing the electric motor 21 and the air compressor. The drive of 20 is stopped. On the other hand, And Gate 3
Since the output of 1 becomes L, the relay driver 32
However, the energization of the switching coil for closing the normally open relay inserted between the output of the signal processing circuit 25 (current braking force signal) and the equipment ground is cut off, so that the contact piece of the relay is opened. When opened, the current braking force signal returns to the level indicating the braking force at that time. At this time, since the pressure of the air-cylinder 17 is high,
The level of the current braking force signal is high, while the F / V converter 26
Since the speed signal output by is a level indicating substantially zero and the level of the target braking force signal output by the amplifier 27 is a level indicating substantially zero, the output of the comparator 28 switches from H to L, and The on-off valve 19 connects the piston drive chamber of the air-cylinder 17 to the atmosphere. As a result, the pressure in the piston drive chamber rapidly decreases, and the braking force finally becomes substantially zero.

Therefore, when the capstan 63 is re-driven next time, the braking force of the turntable 9 is substantially zero, and the pulling of the wire 13 causes the turntable 9 to rotate smoothly with substantially no braking force. Start.

In FIG. 6, the amplifier 27 is provided with a potentiometer capable of adjusting the relationship between the input target speed signal level and the output target braking force signal level, and the user can adjust the speed corresponding to the potentiometer. The braking force can be adjusted.

[0033]

As described above, according to the present invention, the braking control means (18B) causes the revolving drive device (60) to rotate the rotary table as the wire drawing speed increases due to the start of the drawing operation of the wire (13).
Since the braking force of the friction brake material (14) given to (9) is increased, the higher the wire drawing speed is, the higher the tensile tension acts on the wire, and the higher the wire speed is, the stronger the force is to force the wire to stretch linearly. Since the wire rods fed out from the rewinding device are straightened at an early stage, the wire rods fed out are not easily entangled. In addition, when there is a speed fluctuation, the rotating base (9) during deceleration and the motion inertia of the wire rod coil generally cause the wire rod feeding speed to exceed the wire rod drawing speed, resulting in an excessive amount of wire feeding. Since a strong braking force acts on the rotary base (9), the wire feed speed due to the motion inertia of the rotary base (9) and the wire coil is decelerated early, and the wire feed excess amount is extremely small. Also, the wire rod that is fed out is difficult to get tangled.

When the rewinding drive device (60) is stopped, the braking control means (18B) further increases the braking force in response to this, so that the rotation of the rotary base (9) is decelerated quickly and the rotary base (9) is stopped. ) And the wire rod feeding speed due to the motion inertia of the wire rod coil decelerates early, the wire rod feeding excess amount is small, and the fed wire rod is not easily entangled.

Therefore, according to the present invention, even if the drawing speed of the wire rod from the wire rod coil is increased, or even if the wire rod is relatively easily bent and broken, such as a flux-cored welding wire, the breakage frequency of the wire rod is extremely high. It becomes low, and relatively fast rewinding can be performed.

[Brief description of drawings]

FIG. 1 is a block diagram showing a wire drawing equipment including an unwinding device 40 that is an embodiment of the present invention.

FIG. 2 is an enlarged side view showing a mechanism around a turntable 9 of the rewinding device 40 shown in FIG.

FIG. 3 is a plan view of a turntable 9 shown in FIG.

FIG. 4 is a plan view of the base 1 below the turntable 9 shown in FIG.

5 is an enlarged view showing a mechanism for rotatably supporting the turntable 9 between the base 1 and the turntable 9 shown in FIG. 2, and the right half of the figure shows a cross section and the left half shows a side surface. ..

FIG. 6 is a block diagram showing a configuration of an air supply device 18A and a braking control device 18B shown in FIG.

7 is a time chart showing signals of various parts of the electric circuit shown in FIG.

FIG. 8 is a block diagram showing a wire drawing equipment using a conventional rewinding device 90.

[Explanation of symbols]

1: Base 2a to 2d: Support post 3a to 3d: Roller 4: Central post 5: Break drum 6 to 8: Bearing 9: Rotating stand 10a, 10b:
Fixtures 10c, 10d: Pins 11: Coil support inner frame 12: Wire coil 13: Flux-containing large diameter wire 14: Brake belt 15: Fixture 16: Piston rod 17: Air-cylinder 18A: Air-supply device 18B: Braking control device 19: Electromagnetic switching valve 20: Air-compressor 21: Electric motor 22: Motor driver 23: Ogate 24: Pressure sensor 25: Signal processing circuit 26: F / V converter 27: Amplifier 28: Comparator 29: Solenoid driver 30: Re-trigger mono multivibrator 31: And gate 40, 90: Rewinding device for wire rod coil 50, 94: Rust removing device 60, 95 Wire drawing machine 61: Guide roller 62: Dice 63: Capstan 64: Guide low
La 70, 96: Coiler 81, 97: Inner frame of coil support 82: Flux-containing small diameter wire coil 93: Solid large diameter wire 98: Solid small diameter wire coil

Claims (1)

[Claims] 1. A rotary table on which a wire rod coil is mounted; a support member for rotatably supporting the rotary table; a friction brake material for braking the rotation of the rotary table; and a braking drive for the friction brake material. Drive means for detecting the speed of pulling the wire rod by a rewinding drive device for pulling out the wire rod of the wire rod coil; and starting pulling-out drive of the wire rod by the rewinding drive device via the drive means. The braking force of the frictional brake material given to the rotary table with the increase in the pulling speed due to
A rewinding device for a wire rod coil, comprising: a braking control means for further increasing the braking force in response to the stop of the drawing drive of the wire rod by the rewinding drive device.