JPH0491837A - Wire supplying device - Google Patents

Abstract

PURPOSE:To stabilize the tension of a wire with good accuracy by executing drum control while the tension impartation by a tension roller is not changed by the effect of a rotary potentiometer. CONSTITUTION:A connecting rod 31 oscillates around the axial center of a rotational operating shaft to turn the rotational operating shaft as the tension roller 5 ascends and descends. The rotary potentiometer P is adapted to stepless detect the ascending and descending positions of the tension roller 5 relative to the machine body and to electrically take out the result of detection. A controller C automatically operates a motor and brake solenoid in accordance with the result of the detection by the potentiometer P to the state that the tension roller 5 exists at a set neutral level in such a manner that the drum 2 automatically lets off, takes up and stops the wire W and that the drum 2 automatically stops taking-up the wire when the tension roller 5 descends down to an emergency stop level.

Description

Detailed Description of the Invention [Industrial Field of Application] The present invention provides a system in which a tension roller for applying tension to a wire rod fed out from a drum is attached so that it can be freely lowered by its own weight so as to apply tension using its own weight, and the drum is The present invention relates to a wire supply device equipped with a rotationally driven motor.

[Prior Art] In the above-mentioned wire rod feeding device, conventionally, as shown in FIG.
It is provided so that predetermined detection is performed by contact with the switch operating tool (41) that goes up and down with the switch (5), and the supply is performed based on the detection results by the detection switches (STh□'1) and (SW2). By configuring the control mechanism (35) to automatically operate the tram drive motor (M), the tension roller ( 5) Based on the detection of C) H lowering position, the drum (2) was automatically fed out, driven, and stopped by a convex J function. 3. )] Conventionally, the lifting resistance of rank E:/Ii-ra changes depending on the presence or absence of contact resistance when the switch operating tool is in contact with the detection switch and when it is removed from the detection switch. For example, when the tension roller is lowered and the switch operating tool or the detection switch is switched from a non-contact state to a contact state, the lowering resistance of the other Due to the increase in wire tension, the wire tension was lower than before.
Although it is constructed so that tension is applied by 7"-,',/"'J/Yonro Uga Shirato, it is difficult to cause tension changes due to changes in the position of the cola. , the tension was still sufficiently constant.

[-1] An object of the present invention is to provide a wire feeding device that can accurately stabilize the tension and can be obtained at a relatively low cost.

[Means for Solving the Problems, 1] In order to achieve the object, in the wire feeding device according to the present invention, a rotary potentiometer is interlocked with the lifting and lowering of the tension roller, is at the set level -4 and M'
G. When the motor stops 7 and the tension roller is located at a higher level than the set level, the motor is automatically operated based on information from the rotation potentiometer so that the motor rotates toward the wire feeding side. A supply control mechanism is provided.

As a means for interlocking the rotary potentiometer with the lifting and lowering of the tunnel roller, it is possible to use 17 steps or 7 steps, or it is more advantageous to use an interlocking rod with a balance weight as follows. , [Function] While the tension roller moves up and down the desired stroke, [r
By configuring the 11-turn potentiometer so that it does not reach its operating limit and interlocking the tension roller with the rotary potentiometer, the tension roller always rotates in conjunction with the 7-ra elevation while the tension roller moves up and down the desired stroke. The potentiometer is actuated (1) to ensure that there is no change in the lifting resistance of the tension roller due to detection of the lifting/lowering position. Therefore, the vertical position of the tension roller can be detected and the detection results can be obtained using a rotary potentiometer. Then, the supply control mechanism automatically operates the motor based on the information from the rotary potentiometer, so that the drum is automatically controlled to pay out the wire, [,], or stop based on the detection of the vertical position of the tension roller. However, this is done while being careful not to cause any change in the tension applied by the tension roller.

When the tension roller and the rotary potentiometer are linked with an interlocking rod with a balance weight, the interlocking rod is simply installed across the tension roller and the rotary potentiometer, and the weight of the interlocking rod is applied to the tension roller, reducing the lifting load of the tension roller. It becomes possible to detect the lifting position using the rotary potentiometer while preventing the lifting operation force from becoming excessively large or lifting force using the balance weight, thereby making it difficult for the tension roller to exert an adverse effect on the application of tension.

〔Effect of the invention〕

The action of the rotary potentiometer prevents changes in the tension applied by the tension roller, and by controlling the drum, it is now possible to stabilize the wire tension with high precision.

Second, compared to using non-contact sensors such as photoelectric sensors to detect the position of the tension roller, a rotary potentiometer is used at a lower cost and is economically advantageous. If a linked interlocking rod is adopted, the wire tension can be stabilized and economical advantageous due to the interlocking aspect of the rotary potentiometer and the tension roller.

〔Example] Next, examples will be shown.

As shown in Figures 4 and 5, a drum (2
) is mounted so that it rotates around the axis (Xl), and the stepping motor (M) and brake (B) located at one end of the drum (2) drive or brake the drum (2). At the same time, a control device (C) for automatically operating the motor (M) and brake (B) is attached to the upper end side of the sheet metal fuselage part (3). And drums (2)
Above, a plurality of idle rollers (4a to 4e), two tension rollers (5), (5), and a wire feed-out guide (6) are attached to the body part (3), and a wire feed-out guide is attached to the fuselage part (3). [Place (7) on the device cover (8)
), thereby configuring the wire feeding device.
, this wire feeding device is used for the electric discharge machine (E), and the drum (2) is used as shown in Figs.
) The copper wire (W) pulled out from ) is wound around the valley tension rollers (5) and (5) once each by the action of the guide roller (4a) or the feed-out guide (6). By pulling the wire out of the device from the wire delivery D (7) and attaching it to the electrical discharge machine (E), as the electrical discharge machine (I) pulls in the wire (W) for consumption or transfer. The wire is automatically fed out while keeping the wire tension at the set tension and preventing the wire from getting caught in the device even if the wire is cut. The details are as follows.

That is, as shown in Fig. 2, a pair of tensions [1-
Ra (5), (5) is one rXi7-ra support (9) that pivotally supports these so that they can each rotate around the same axis (X2), and a round bar guide ( P0), and a pair of upper and lower guide handles (], 1a).

ciib: + is attached to the fuselage part (3) via the claw side. Then, move the support tool (0) to the l-' (P0
), and the guy) is installed by sandwiching this round bar (P2) between the round bar (P2) and the round bar (P2) installed across the tool (lla) and (P1, b). 7- A pair of rollers (
P3a), (], 3h>, the pair of tension rollers (5) is configured to prevent the roller support (9) from rotating relative to the kite (P0).
.

(5) connects these rotation axes (x2) with guide rollers (4
d) and (4e) so that it can be moved up and down along the guide (lO) while being maintained parallel or almost parallel to the rotation axis (x3), and can be lowered by its own weight. It is. And a pair of tension rollers (5), (5
) is arranged so that the wire (W) is wound while being suspended and supported by the wire (W) from the drum (2), so that the wire (W) fed by the drum (2) It is configured to apply tension using its own weight.

As shown in Figure 3, the drum support shaft (P4) is rotatably attached (pulled support member) via a bearing (P5).
P6), a pair of ring-shaped cushioning rubber (P7),
(P7) to the fuselage part (P8), and then attach the drum (2) to one end of the drum support shaft (P4) so that it can be removed and removed, and the screw-type removal stopper (P9). The pressing part (2) of the fixture (20) is tightened and rotated.
0a, ) and the engagement acting portion (20b) act on the drum (2), the drum (2) is moved to the drum support shaft (P4).
) is constructed so that it can be attached to rotate integrally with the 2. Then, the motor (M) is attached to the support member (P6), and the motor (M) is attached as shown in FIG.
) and the drive pulley (22) of the drum support shaft (P4). (M) Drum spindle (P4)
By enabling the rotational drive of the motor (M) and the drum (2), the vibrations generated due to the rotation and stopping of the motor (M) and the drum (2) are transmitted to the aircraft body without being alleviated by the cushion gore A (P7). It is configured so that the drum (2) can be driven by the drum (2).

The plate (B) is attached to the pivot shaft (25) as shown in Figure 3.
The fuselage part (P8
), and an electromagnetic brake solenoid (SL) that acts separately on the IF side of the pivot shaft (2!i), and a brake
-The brake spring (26) is configured so that it can be operated with the brake spring (26) and the brake pad (27) of the brake (B) is the fuselage part. (3) protrudes from the notch hole (3a) to the drum side 1,
The drum support shaft (P4) is equipped with a gear disk (28
) to apply frictional braking.
The brake (B) is configured to swing and bias the brake (B), with the fuselage part (P8) being the fixed side, and the brake (B) being attached to the drum (2) via the drum support shaft (P4). In order to perform a braking action, the brake is configured as a friction type negative deep brake so as to be biased by a brake ring (26).

As shown in Figures 1 and 2, the rotary operation shaft of the rotary potentiometer (I) attached to the fuselage part (3) <2
! 'J) Take one end of the interlocking rod (3) through the balance weight (30) to the extent of body rotation. -1-La support 1+
Locking member (32) a-locking "j-" attached to 81 (9)
・:) (3:)) Insert the sliding mechanism between n6 and connect it to one unit (J-ra ("))". Ze de 5, Rose:...Sou...
1-Item c: q O) is the rotational operation axis < 29) with respect to i-) Non-F-/r: 11111-Ra side is the opposite slope side 1
．． 1, long [1 - protrudes longer than the other side 5, interlocking +
5) It is formed so that it has a center of gravity position adjustment action 4", and the weight of the interlocking rod (31) is
55, which is the lifting load and lifting operation force of the tension 0-ra (5).

It is prevented by the 41 use of the light (30), and the interlocking rod (
31), the rotary potentiometer (P)) is linked to the rise and fall of the tension row (5). So σ July - Interlocking toga (3
, 1) or swings around the axis of the rotary operation shaft (29) [, 7].

By configuring the rotary operation shaft (29) to rotate, the rotary potentiometer ([]) can steplessly detect the vertical position relative to the machine body at tension 0--'5 (5). At the same time, the carcasses and lamina detected should be removed (2).
It is 2. Then, the tram (2) automatically starts feeding (or winding) the wire (W) when the tension [j-ra (5) is at the 1''L level (N) during the setting shown in Figure 1. In order to stop them, the tension is ``1''.
- The controller (C) controls the motor based on the detection result by the potentiometer (P) so that when the wire (5) descends to the emergency stop level (S), the wire winder (2) automatically stops winding the wire. (M) and play kit/maid (31
, ) are configured to operate automatically.

That is, as shown in FIG. 7, the control device (C) controls the operation of the motor (M) by operating the drive circuit (34) of the motor (M) based on the detection result by the potentiometer (P). The brake is activated by operating the supply control circuit (35) that operates the brake solenoid (SL) relay type switch mechanism (36) based on the detection result by the potentiometer (P), and the drive circuit (34). (B) and a brake control circuit (37) that controls the operation of the motor (N). , the supply control circuit (35) includes a resistor bridge circuit (38), an operational amplifier (39a) on the non-rolling side, and a V/F conversion circuit (40).
a) It is composed of an operational amplifier (39b) on the reverse side and a V/F conversion circuit (40b), respectively. That is, the resistor bridge circuit (38) has a rotational potential of 1 meter (P
) is converted into a voltage proportional to the level at which the tension roller (5) is located. When the tension roller (5) is located at a level higher than the set neutral level (N), the resistance bridge circuit (38) In this case, the operational amplifier (39a) on the forward rotation side integrates and amplifies the voltage converted by the resistor bridge circuit (38), and the tension roller (5)
The further the separation distance from the setting neutral L/bevel N), the closer the control target simultaneous rotation speed becomes.
) control (2) The V/F conversion circuit (40a) converts the voltage from the operational amplifier (39a) into pulses (67, drives the motor (M) on the wire feeding side at a predetermined rotation speed) The pulse (No. 3) to be caused is output to the drive circuit (34). Then, when the tension [Hula (5) is at a level lower than the set value (N), the conversion by the resistor Brillant circuit (38) is performed. Type 1 pressure becomes smaller than the setting range.In this case, the operational amplifier c3q on the reverse side
b > integrates and amplifies the converted voltage measured in the resistor bridge circuit (38), and the control target rotation speed is made to be as close as possible to the distance from the set neutral level (N) of the tension roller (5). 2 to control the motor (N1) [
Set the rotation speed for up to 8 people per station [7, V/'F conversion circuit (40
b) converts the voltage from the four beam amplifier (39b) into pulses and outputs a pulse signal to the drive circuit (34) to drive the motor (M) toward the wire winding side at a predetermined rotation speed.

When the voltage converted by the resistor bridge circuit (38) is within the set range, a signal to stop the motor (M) is output to the drive circuit (34).

The control circuit (37) controls the tension roller (
5) falls to the emergency stop level (S), a signal to stop the motor (λ()) is automatically sent to the drive circuit (34) based on the information from the obeah (39b). The switch mechanism operates the brake solenoid (S1., ) to the brake-on side so that the drum (2) is stopped as instantaneously as possible by the brake (B) regardless of the high-speed winding rotation until then. (36) is configured to cover the cutting operation.

In addition to the electrical discharge machine, the present invention can also be applied to a feeding device that supplies devices such as devices that form wire rods into forming sections.

7, the wire (W) is referred to as a wire rod (W).

Instead of the supply control circuit (35), a microcomputer may be used and implemented, and these are referred to as a supply control mechanism (35).

The balance weight (30) is used not only as an interlocking member that connects the interlocking rod (31) to the rotary operation shaft (29) as in the above-mentioned structure, but also as a member exclusively for the balance weight (31). ) may be formed so as to be connected only to -C.

In addition, drawings are included in the claims section. For convenience of comparison, the present invention is not limited to the structure shown in the accompanying drawing ζ1.

[Brief explanation of drawings]

The drawings show an embodiment of the wire rod feeding device according to the present invention. FIG. 1 is a front view of the tension roller installation section, FIG. 2 is a side view of the tension roller installation section, and FIG. 3 is a torano/mounting section. 4 is a partially cutaway front view of the entire wire feeding device, FIG. 5 is a partially cutaway side view of the entire wire feeding device, FIG. 6 is a side view of the drum drive section, and FIG. 7 is a partially cutaway front view of the entire wire feeding device. is a block diagram of the control system. FIG. 8 is a schematic diagram of a conventional supply device.輯)...Drum, (5)...Tension roller, (29)...Rotary operation shaft, (30)
・・・・・・Balance weight, (31)・・・・・・
Interlocking rod, (35)... Supply control mechanism, (P).
...Rotating potentiometer, (W)...
Wire rod, (M)...Motor. 7th approval

Claims (1)

[Scope of Claims] 1. A tension roller (5) that applies tension to the wire rod (W) fed out from the drum (2) is attached so as to be freely lowered by its own weight so as to apply tension by its own weight, and the drum (2) is A wire rod feeding device equipped with a rotationally driven motor (M), in which a rotary potentiometer (P) is linked to the lifting and lowering of the tension roller (5), and the tension roller (5) is positioned at a set level (N). Then, when the motor (M) stops and the tension roller (5) is located at a level higher than the set level (N), the rotation potentiometer ( a supply control mechanism that automatically operates the motor (M) based on information from P);
35). 2. One end side of the interlocking rod (31) of the rotary potentiometer (P) and the tension roller (5) is attached to the rotary operation shaft (29) of the rotary potentiometer (P) so as to be integrally rotatable, and the interlocking rod (31) the other end side is engaged with the tension roller (5) so as to be able to move up and down integrally;
The wire rod supply according to claim 1, further comprising a balance weight attached to the interlocking rod (31) that protrudes on the side opposite to the tension roller side with respect to the rotating operation shaft (29) and acts on the interlocking rod (31). Device.