JPH0491838A - Wire supplying device - Google Patents

Abstract

PURPOSE:To suppress or avert the transfer of oscillation to a machine body frame by cushion materials by constituting the above device in such a manner that a drum and a motor are supported by the machine body via a supporting member and cushion materials. CONSTITUTION:The supporting member 16 turnably mounted with a drum supporting shaft 14 via a bearing 15 is mounted to the machine body part 18 via a pair of the annular cushion rubber 17, 17. The drum 2 is freely removably fitted onto one end side of the drum supporting shaft 14. A part 20a for pressing a fixture 20 and a part 20b for engaging the mixture are acted on the drum 2 by the operation to tighten and turn a screw type stopper 19, by which the drum 2 can be mounted so as to be turned integrally with the drum supporting shaft 14. The motor M is mounted to the supporting member 16 and is so constituted that the driving of the drum 2 by the motor M is executed while the transmission of the oscillation generated by turning and stopping of the motor M and the drum 2 to the machine body is relieved by the cushion rubber 17.

Description

Detailed Description of the Invention [Industrial Field of Application] The present invention provides a system in which a tension roller that applies tension to a wire rod fed from a drum is attached to a machine body so as to be able to freely descend under its own weight so as to apply tension using its own weight. The present invention relates to a wire supply device that is provided with a sensor that detects a lifting position, a motor that rotationally drives the drum, and a supply control mechanism that automatically operates the motor based on the detection result of the sensor.

[Conventional technology]

The double-layer wire feeding device uses tension rollers to apply tension and drum operation by the motor of the feeding control mechanism to feed the wire while maintaining the wire tension at a set tension to prevent sagging or excess tension from occurring in the wire. It has been designed to ensure that

Conventionally, in this type of wire rod supply device, the drum and the drum driving motor have been mounted so as to be rigidly supported by the machine body. Further, the rotation of the drum is stopped only by stopping the rotation of the motor.

[Problem to be solved by the invention]

Conventionally, when the drum was driven or stopped, the vibrations generated by the rotation or stopping of the drum, mower, and brake were transmitted to the machine body, and the tension roller was able to move up and down with respect to the machine body and was suspended and supported by wire rods. Because of this, there were cases where the vibration of the aircraft affected the detection by the sensor. Also,
When the drum is stopped, even though the motor has stopped rotating, the drum sometimes rotates too much due to inertia due to the previous rotation, resulting in poor control in terms of drum operation.

SUMMARY OF THE INVENTION An object of the present invention is to provide a device that can control a drum while preventing the adverse effects of vibration caused by driving the drum and excessive rotation of the drum.

[Means to solve the problem]

In order to achieve the purpose of the wire feeding device according to the present invention, in the device described at the beginning, a support member is attached to the machine body via a cushion material, and the support member is attached to the support member. and the motor is attached, a brake acting on the drum is attached to the aircraft body, and a brake control mechanism for automatically operating the brake is provided. That's right.

[Function] By appropriately setting the strength and cushioning performance of the cushion part, the drum and motor can be supported as desired by the fuselage via the support member and the cushioning material, and moreover, the drive of the drum and motor can be controlled as desired. The cushioning material suppresses and prevents vibrations caused by stopping or stopping from being transmitted to the aircraft frame.6 In addition, the motor and drum are supported by the same support member to prevent relative vibration, and the aircraft Compared to the case where the motor is separately supported through a cushioning material, poor transmission due to relative vibration between the motor and the drum can be avoided, and draught driving can be performed with high precision.

By configuring the brake control mechanism to automatically operate the brakes appropriately, when the drum is stopped, the brakes are applied in addition to braking by stopping the rotation of the motor, and the tram does not rotate too much due to rotational inertia. It can be stopped with relatively high accuracy.

The brake is supported by the fuselage and acts on the drum side with the fuselage as the stationary side. For this reason, the shaking motion of the drum and motor relative to the body when the brake is applied is relatively small, and the vibration of the body caused by this shaking motion is also small, making it difficult to affect the sensor. That is, if the brake is attached to the support member so that it is on the fixed side, the drum and motor tend to swing considerably relative to the machine body due to the impact of stopping the drum and the cushioning material when the brake is applied.

〔Effect of the invention〕

The support member that supports both the drum and motor, and the brake, allow the drum to be rotated and stopped with high precision. Due to the configuration, the installation is
・Despite the vibrations that occur when the motor starts and stops, the vibrations can be made to have little effect on the detection by the sensor, and the wire supply can be controlled with good precision from both the detection surface and the tram operation itself. 9. [Example] Next, an example will be shown.

As shown in Figures 4 and 5, a drum (2
) is installed so that it rotates around the axis (Xl), and the stepping motor (M) and brake (B) located at one end of the drum (2) are used to 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 guide 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 body part (3). Insert the opening (7) into the device cover (8).
), thereby constituting a wire feeding device. This wire feeding device is used for the electric discharge machine (E), and as shown in FIGS.
The discharging copper wire (W) pulled out from the guide roller (
4a) to 4e) and the feeding guide (6), the wire is wound once around each tension roller (5), (5) and pulled out of the device from the wire feeding port (7), and the discharge section is opened. By attaching it to the second machine (E), as the electric discharge machine (E) pulls in the wire (W) for consumption or transfer, it automatically adjusts the wire tension to the set tension, and 2, which is configured to feed out the wire while preventing the wire from being entangled in the device even if the wire is cut. The detailed structure is as follows.

That is, as shown in FIG. 2, the pair of tension rollers (5), (5) are supported by one roller support (
9) The round bar guide (lO) in the vertical direction of the fuselage and the pair of upper and lower guides are attached to the tool (lla).

It is attached to the fuselage part (3) via (1, 1, b). Then, guide the roller support (9) (10)
The roller support (12) is constructed so as to slide against the guide, and is fitted with a detent round bar (12) installed across the tools (lla) and (llb), and a roller support (12) that is sandwiched between the round bars (12). 9) - Pair of rollers (13a)
), (13b), the roller support (9)
a pair of tension rollers (5) by being configured to prevent rotation relative to the guide (10);

(5) connects these rotation axes (X2) with guide rollers (4
It is configured to move up and down along the guide (10) while remaining parallel or nearly parallel to the rotation axis (x3) of (d) and (4e), and to be able to descend by its own weight. 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).
W) is configured to apply tension by its own weight.

As shown in FIG. 3, the drum support shaft (14) is rotatably attached to the support member (1) via a bearing (15).
G) with a pair of ring-shaped cushion rubber (17N1.7
), and the drum (2) is attached to one end of the drum support shaft (14) so that it can be removed and removed freely, and the screw-type removal stopper (19) is tightened. The pressing part (20a,) of the fixture (20) is
and the engagement acting portion (2Ob) act on the drum (2), so that the drum (2) can be attached to the drum support shaft (14) so as to rotate integrally; 3; Then, the motor (M) is connected to the support member (16).
), as well as the output pulley (21) of the motor (M) and the drive pulley (2) of the drum support shaft (14) as shown in Figure 6.
2), the tension roller (24) applies transmission tension to the timing belt (23) wound around the timing belt (23), and enables the motor (M) to rotate the drum support shaft (14). (M) and drum (2)
The structure is such that the drum (2) can be driven by the motor (M) while the cushion rubber (17) alleviates vibrations generated due to rotation and stoppage of the drum (2) from being transmitted to the body.

The brake (B) is attached to the pivot shaft (25) as shown in Figure 3.
the fuselage portion (18) so as to be swingably supported through the
It is configured to be operated by an electromagnetic brake solenoid (SL) that acts separately on the upper and lower sides of the pivot shaft (25) and a brake spring (26). The brake spring (26) has a pad portion (27) of the brake (B) protruding from the notch hole (3a) of the fuselage portion (3) toward the drum side, and a brake disk (28) provided on the drum support shaft (14). The brake (B) is configured to swing and bias the brake (B) to an engaged state in which it comes into contact with the brake and applies frictional braking. In other words, the brake (B) is the fuselage part (
Attach the drum support shaft (14) to the drum (2) with the drum support shaft (18) as the fixed side.
), and is configured as a friction type negative brake so as to be applied and biased by a brake spring (26).

As shown in Figures 1 and 2, rotation operation M (29) of the rotary potentiometer (P) attached to the fuselage part (3)
Balance Ugoi 1-(30) (7 and interlocking rod (3j)
) is attached so that it can move between the bodies, and the other end of the interlocking rod (31) is locked with the locking member (32) attached to the [1-ra support (9)] [X]- The weight of the interlocking rod (31,) is reduced by sliding between the tension roller (33) and the tension roller (5) so as to move up and down together with the tension roller (5). The lifting load and lifting operation force are prevented by the action of the balance arm (30), and the rotating potentiometer (P) is controlled to move the tension roller (5) up and down using the interlocking rod (31). It is linked. A, that is, the tension roller (5)
As it rises and descends, the interlocking rod (31) swings around the axis of the rotational operation shaft (29) due to the lifting and lowering forces, causing the rotational operation shaft (29) to rotate. J, which is configured to . , (S, T) The drum (2) automatically starts feeding and winding the wire (W) when the tension D-ra (5) is located at the neutral 17 bell (N) setting shown in Figure 1. When the tension roller (5) is lowered to the emergency stop level (S), the drum (
Based on the detection result by the potentiometer (1)), the control device (C) controls the super motor (M) and the brake solenoid L/noid (2) to automatically stop the wire winding.
Sl,) is configured to automatically operate.

That is, as shown in FIG. 7, the control device (C) controls the motor (
Supply control to operate the motor (M) by operating the drive circuit (34) of the motor (4-7j path (35), brake solenoid (Sl,) based on the detection result by the potentiometer (P)) relay type switch mechanism (
36), and a brake control circuit (37) which operates the brake (B) and knee lift (M) by operating the drive circuit (34).

The supply control circuit (35) includes a resistor bridge circuit (38), a forward side operational amplifier (39a), and a V/'F conversion circuit (4).
0a), an operational amplifier (39b) on the reverse side, and a V/lower conversion circuit (40b), respectively. That is,
A resistive bridge circuit (38) connects the rotary potentiometer (I
]) 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 converted voltage by the resistive bridge circuit (38) falls outside the set range. In this case, the operational amplifier (39a) on the normal rotation side integrates and amplifies the voltage converted by the resistance bridge circuit (38), and the tension roller (5)
(The further the distance from the D setting neutral level (N) is, the further the control target rotation speed becomes.
), and set the control target maximum rotation speed of the V/F conversion circuit (4
0a) converts the voltage from the operational amplifier (39a) into pulses and outputs a pulse signal to the drive circuit (34) to drive the motor (M) toward the wire feeding side at a predetermined rotation speed.

Then, when the tension roller (5) is located at a level lower than the set neutral level (N), the voltage converted by the resistive bridge circuit (38) becomes smaller than the set range. In this case, the operational amplifier (391) on the reverse side integrates and amplifies the voltage converted by the resistor bridge circuit (38), and the more the distance from the set neutral level (N) of the tension roller (5) is The control target maximum rotation speed of the motor (M) is set so that the control target rotation speed is greater than 7, and the V/F conversion circuit (40b) is connected to the operational amplifier (39b).
A pulse signal is output 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, No. 48 to stop the motor (M) is output to the drive circuit (34).

The brake control circuit (37) is a tension roller (5)
When the motor (M) falls to the emergency stop level (S), the motor (M) is automatically stopped based on the information from the operational amplifier (39b).
At the same time, the brake solenoid (Sl ,) is configured to turn off the switch mechanism (36) in order to operate it to the brake-on side.1.In addition to the electric discharge I machine, we also supply devices that mold and pressurize wire rods, etc. The present invention can also be applied to a supply device. Therefore, the wire (W) is referred to as a wire rod (W).

A spring or the like may be used instead of the cushion rubber (17), and these are collectively referred to as the cushion material (17).

A detection switch may be used instead of the rotary potentiometer CP), and these will be simply referred to as sensors (P).

Instead of the supply control circuit (35) and the brake control circuit (37), a microcomputer may be used for implementation, and these will be referred to as a supply control mechanism (35) and a brake control mechanism (37).

The brake (B) may be configured to perform a braking action not only during an emergency stop but also during a neutral stop when the tension roller (5) is located at the set neutral level (N).

Incidentally, although reference numerals are written in the claims section for convenient comparison with the drawings, the present invention is not limited to the structure shown in the accompanying drawings. ,

[Brief explanation of the drawing]

The drawings show an embodiment of the wire rod feeding device according to the present invention, in which 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 view of the drum attachment 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;
Figure 6 is a side view of the drum drive unit, and Figure 7 is a block diagram of the control system.3 (2)...Drum, (5)...Tension roller, (16) ...supporting member, (17)
... Cushion material, (35) ... Supply control mechanism, (37) ... Brake control mechanism, (
P)...Sensor, (W)...Wire, (
M)...Motor.

Claims (1)

[Scope of Claims] A tension roller (5) that applies tension to the wire rod (W) fed out from the drum (2) is attached to the machine body so as to be able to freely descend under its own weight so as to apply tension by its own weight, and the tension roller (5) A sensor (P) for detecting the elevation position and a motor (M) for rotationally driving the drum (2) are provided, and the motor (M) is automatically operated based on the detection result by the sensor (P). A wire rod supply device provided with a supply control mechanism (35), the support member (1) being connected to the body via a cushioning material (17)
6), the drum (2) and the motor (M) are attached to this support member (16), and the brake (B) that acts on the drum (2) is attached to the aircraft body. ) is equipped with a brake control mechanism (37) that automatically operates the wire rod supply device.