JPH11300594A - Wire traveling device of wire saw device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To keep the wire tension constant until the wire passes through a multiple groove roller from a wire feed reel by controlling the braking torque of the wire feed reel according to the detection signal of a wire tension detecting means when the tension is fluctuated to a set wire tension. SOLUTION: A wire 4 is sent in one direction in the state where it is wound on multiple groove rollers 49, 50 and a wire driving multiple groove roller 51 with a fixed tension, and a work 1 mounted on a rotated or/rocked work fixing table is machined. In this case, when the tension of the wire 4 is minimized by any cause, a wire tension detecting roller 40 on a wire tension detecting lever 38 interlocked with this tension fluctuation is moved in the direction of pushing the wire 4. According to this, a brake shoe 32 is strongly pressed to a brake disc 35 through a brake wire 37 to regulate the braking torque of a wire feed reel 6 in the direction of increasing the tension of the wire 4.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a wire-saw device for performing grooving and cutting of precision electronic components and the like, which controls a wire to travel in one direction and to control a set constant tension. .

[0002]

2. Description of the Related Art FIG. 4 shows an outline of a general conventional wire saw device. In a general conventional wire saw device, the wire 4 is wound around a multi-groove roller 49, a multi-groove roller 50, and a wire drive multi-groove roller 51 having grooves formed at a constant pitch under a constant tension. In this case, the vehicle reciprocates at high speed through the seesaw mechanism 71. The work 1 fixed to the upper and lower cutting table 21 via the dummy plate 2 is pressed by the cutting operation of the upper and lower cutting table 21 against the wire 4 while being supplied with the abrasive liquid, and is cut and grooved.

In consideration of the abrasion due to the processing of the wire 4, the new wire 4 is sent out from the wire supply reel 36 and taken up by the wire take-up reel 55.

[0004]

However, in a general conventional wire saw apparatus, in order to obtain a relative speed between the wire and the work required for processing, the wire must be reciprocated at high speed and reciprocated. A large, complex and expensive mechanism was required. On the other hand, the wire and the work required for processing are made by moving the wire with a constant tension in one direction without reversing the running, and performing the rotating motion or the oscillating motion, or the rotating motion and the oscillating motion at the same time. The problem is that the wire saw device that obtains the relative speed of the above requires a small and inexpensive wire traveling device that accurately controls the wire tension at a set constant tension, instead of a large and complicated mechanism such as a seesaw mechanism. There is.

SUMMARY OF THE INVENTION An object of the present invention is to provide a small and inexpensive wire traveling device for a wire saw device that precisely controls a wire to a set constant tension with respect to such a problem.

[0006]

Means for Solving the Problems In order to achieve the above-mentioned object, the invention according to claim 1 comprises means for moving a wire in one direction with a constant tension, and a work fixing table which is rotatably held and rotated. A means for performing a motion, a means for fixing and holding the work fixing table at an arbitrary angular position, and a means for holding a swing table so as to be slidable linearly and performing a reciprocating swing motion. In a wire saw device for performing grooving and cutting of an arc-cut surface shape, a wire traveling device includes a means for detecting a wire tension and a wire supply reel so that the wire tension becomes constant according to a change in the wire tension. Means for controlling the braking torque, driving means for driving the multi-groove roller at a constant speed in the direction in which the wire is pulled out from the wire supply reel, and wire winding reel for winding the wire after passing the multi-groove roller. Constant torque winding and means, characterized in that it precisely controlled to a constant tension is set while traveling wire in one direction.

According to the above-described means, the multi-groove roller is driven by the drive motor at a constant rotation speed in a direction in which the wire is pulled out from the wire supply reel.
It is withdrawn from the wire supply reel at a constant speed. Also,
When a tension fluctuation occurs with respect to the set wire tension, the tension fluctuation is detected by a means for detecting the wire tension,
Accordingly, the braking torque of the wire supply reel can be controlled by the means for controlling the braking torque of the wire supply reel so that the wire has a set constant tension, and the wire tension between the wire supply reel and the passage through the multi-groove roller can be controlled. Can be kept constant. After passing through the multi-groove roller, it is wound on a wire winding reel with a constant torque. Therefore, it is possible to provide a small and inexpensive wire traveling device that precisely controls the wire to the set constant tension by using the above means.

According to a second aspect of the present invention, there are provided means for moving the wire in one direction with a constant tension, and means for holding the work fixing base in a rotatable manner and performing a rotating motion. In a wire saw device that performs grooving and cutting, a wire traveling device detects a wire tension, and a device that controls a braking torque of a wire supply reel so that the wire tension becomes constant according to a change in the wire tension. A driving means for driving the multi-groove roller at a constant rotation speed in a direction in which the wire is pulled out from the wire supply reel, and a means for winding the wire after passing the multi-groove roller on the wire take-up reel with a constant torque, It is characterized in that the wire is precisely controlled to a set constant tension while traveling in one direction.

[0009]

DESCRIPTION OF THE PREFERRED EMBODIMENTS (First Embodiment) An embodiment of the present invention will be described below with reference to the drawings.

FIG. 2 shows an outline of a wire saw apparatus to be used. The wire 4 has a multi-groove roller 49, a multi-groove roller 50,
While being wound around a wire-driven multi-groove roller (not shown) at a fixed tension, the paper is fed in one direction with a constant tension. The work 1 is fixed to a mounting surface of a work holder 5 having a regular polygonal shape, and the work holder 5 performs a rotating motion by a rotating unit, a swinging motion by a swinging unit, or a rotation and a swinging motion simultaneously. Thereby, the relative speed between the workpiece 1 and the wire 4 required for the processing is obtained. Therefore, the wire saw device is a type in which the workpiece 1 performs the processing while performing the rotation or the oscillating motion, or the rotation and the oscillating motion at the same time.

FIG. 1 shows a wire traveling device. The wire 4 starts from the wire supply reel 36, passes through the wire guide roller 46, the wire tension detecting roller 40, the wire guide roller 47, and the wire guide roller 48, passes through the multi-groove roller 49, the multi-groove roller 50, and the wire drive multi-groove roller. 51
The wire drive multi-groove roller 51 is rotated at a constant speed by a wire drive motor 52 in a state where the wire is wound, runs at a constant speed, and after exiting the multi-groove roller 50, passes through a wire guide roller 54 to take up the wire. The wire is wound around the wire winding reel 55 with a constant torque by a reel driving torque motor 56.

The brake disk 35 is fixed to the side of the wire supply reel 36, and is connected to the wire supply reel 36.
It is rotatably held together with. Brake lever 33 rotatably held on brake lever support shaft 31
When the brake shoe 32 fixed to the brake lever 33 is pulled by the brake wire 37 connected to the brake wire connection hole 34 at the tip, the brake shoe 32 is pressed against the brake disc 35 and the brake proportional to the pulling force of the brake wire 37 is applied. Generate force. At this time, the brake lever support shaft 31 is connected to the brake disc 35 at the contact point between the outer periphery of the brake disc 35 and the brake shoe 32.
Is located near the tangent to the outer circumference circle of.

A wire tension detecting lever 38 rotatably held by a wire tension detecting lever support shaft 39 has a wire tension detecting roller 40 rotatably held at a tip thereof, and a brake wire connecting hole connected to a brake wire 37. 41 and a weight wire connection hole 42 connected to the weight wire 43
have. The moment around the wire tension detection lever support shaft 39 is a clockwise moment generated when the wire tension detection roller 40 pushes the wire 4 against the wire guide roller 46 and the wire guide roller 47, and the tension of the brake wire 37. And the clockwise moment generated by the weight of the wire tension detecting lever 38 and the counterclockwise moment generated by the tension of the wire tension adjusting weight 44. Therefore, at a position where the total moment around the wire tension detection lever support shaft 39 becomes zero,
The wire tension detecting lever 38 is in a balanced state. At this time, the wire tension adjusting weight 44 is adjusted so as to have the set wire tension.

If the tension of the wire 4 is reduced for some reason, the wire tension detecting roller 40 on the wire tension detecting lever 38 tends to move in the direction of pushing the wire 4, so that the brake wire 37 is pulled and the brake shoe 32 is pulled. The brake disc 35 is pressed more strongly, and acts to increase the tension of the wire 4. If the tension of the wire 4 increases, the wire tension detecting roller 40 attempts to move in a direction to reduce the amount of pushing the wire 4, so that the pulling force of the brake wire 37 is weakened, and the brake shoe 32 is moved to the brake disc 35. , And acts to reduce the tension of the wire 4. As described above, when the tension of the wire 4 deviates from the set value, the operation is automatically performed so that the tension of the wire 4 becomes the set value.

By this action, the wire drive motor 52
Even when the wire 4 is driven at a constant rotation speed, the wire 4
Becomes the set constant tension.

After passing through the multi-groove roller 50, the wire 4 is wound on a wire winding reel 55 rotated by a wire winding reel driving torque motor 56 at a set constant torque. At this time, the tension of the wire 4 is inversely proportional to the winding radius at the time of winding, but since it is not a processing portion, the tension does not need to be precisely constant.
If the winding torque is set so that the maximum tension of the wire 4 becomes the set wire tension before passing through the multi-groove roller 50, the wire 4
Can be wound without risk of breakage.

Therefore, according to the first embodiment, it is possible to realize a small and inexpensive wire traveling device for controlling a wire to a predetermined constant tension with high accuracy. When a thin wire 4 having a diameter of about 0.06 mm or less is used, the wire 4 is easily broken due to a change in tension.
In particular, the present wire traveling device is effective.

(Second Embodiment) FIG. 3 shows an outline of a wire saw apparatus to be used. The wire 4 is a multi-groove roller 4
9. While being wound around the multi-groove roller 50 and a wire-driven multi-groove roller (not shown) at a fixed set tension, the paper is fed in one direction with a constant tension. The work 1 is fixed to a mounting surface of a work holder 5 having a regular polygonal shape, and the work holder 5 performs a rotating motion by a rotating means to obtain a relative speed between the work 1 and the wire 4 necessary for processing. . Therefore, this is a wire saw device in which the work 1 performs the processing while performing the rotary motion.

The wire running device is the same as in the first embodiment.

Therefore, according to the second embodiment, the wire can be connected to a simpler and less expensive wire saw device which obtains the relative speed required for machining the wire 4 and the work 1 by this rotational movement. A small and inexpensive wire traveling device that controls to a constant tension set accurately can be realized.

[0021]

As described above, according to the present invention, in a wire saw apparatus for performing grooving processing and cutting processing for precision electronic component processing, etc., a precisely set constant while running a wire in one direction. It is possible to use a small and inexpensive wire traveling device that controls the tension at a low level.

[Brief description of the drawings]

FIG. 1 is a schematic configuration diagram illustrating an embodiment of a wire traveling device according to the present invention.

FIG. 2 is a schematic configuration diagram illustrating a wire saw device according to a first embodiment to which the present invention is applied.

FIG. 3 is a schematic configuration diagram illustrating a wire saw device according to a second embodiment to which the present invention is applied.

FIG. 4 is a schematic configuration diagram illustrating a general conventional wire saw device and its wire traveling device.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Work 2 Dummy plate 4 Wire 5 Work fixing stand 6 Angle scale positive scale 7 Angle scale auxiliary scale 8 Bearing support member 9 Rotating shaft 10 Pulley 11 Belt 12 Work fixing table drive motor 13 Clamp mechanism 14 Fixing screw 15 Brake shoe 16 Swing Table 17 Crank mechanism 18 Linear guide 19 Swing table drive motor 20 Crank mechanism support table 21 Upper and lower notch table 22 Second bearing support member 23 Work fixed table support table 31 Brake lever support shaft 32 Brake shoe 33 Brake lever 34 Brake wire connection hole 35 Brake disc 36 Wire supply reel 37 Brake wire 38 Wire tension detection lever 39 Wire tension detection lever support shaft 40 Wire tension detection roller 41 Brake wire coupling hole 42 Weight wire Connection hole 43 Weight wire 44 Wire tension adjusting weight 45 Guide roller 46 Wire guide roller 47 Wire guide roller 48 Wire guide roller 49 Multi-groove roller 50 Multi-groove roller 51 Wire drive multi-groove roller 52 Wire drive motor 53 Belt 54 Wire guide roller 55 Wire take-up reel 56 Wire take-up drive torque motor 71 Seesaw mechanism

Claims (2)

[Claims] 1. A means for moving a wire in one direction with a constant tension, a means for rotatably holding a work fixing table and performing a rotating motion, and a means for fixing and holding the work fixing table at an arbitrary angular position. Means for holding a swinging table slidably in a linear manner and performing reciprocating swinging motion, and detecting wire tension in a wire saw device for performing grooving and cutting processes of a straight-line and an arc-cutting surface shape. Means for controlling the braking torque of the wire supply reel so that the wire tension becomes constant in accordance with the change in the wire tension; and driving the multi-groove roller at a constant rotational speed in the direction in which the wire is pulled out from the wire supply reel. Drive means, and means for winding the wire after passing through the multi-groove roller on the wire take-up reel with a constant torque, and while the wire is running in one direction, the tension is set to a predetermined value. A wire traveling device characterized by controlling. 2. A means for causing a wire to travel in one direction with a constant tension, and means for holding a work-fixing base rotatably and performing a rotary motion. In a wire saw device, a means for detecting a wire tension, a means for controlling a braking torque of a wire supply reel so that the wire tension becomes constant according to a change in the wire tension, and a method in which a wire is moved from a wire supply reel by a multi-groove roller. It has a driving means for driving the wire after passing through the multi-groove roller at a constant rotation speed in a pulling-out direction, and a means for winding the wire on a wire take-up reel with a constant torque, and is set while running the wire in one direction. A wire traveling device characterized by controlling to a constant tension.