JPH091452A - Wire type cutting-off method and apparatus therefor - Google Patents

Abstract

PURPOSE: To provide a wire type cutting-off method and apparatus therefor capable of uniformly supplying working liquid to a portion against which a wire is pressed to improve the working accuracy irrespective of the shape of a cut-off workpiece. CONSTITUTION: In a cutting-off method wherein wires 1 wound around a plurality of grooved rollers 2 located at predetermined intervals are allowed to travel and a cut-off workpiece 3 is pressed against the wires 1 for cutting-off, working liquid 5 containing isolated grinding grains is sprayed to the wires 1 and cut-off the workpiece 3.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a wire type cutting method and a cutting apparatus.

[0002]

2. Description of the Related Art Conventionally, a wire type cutting apparatus as shown in FIG. 2 has been used for cutting brittle materials such as semiconductor materials, magnetic materials and ceramic materials.

As shown in the figure, this device has three rolls.
22 and a plurality of wires 21 wound around this roller
And a shower nozzle 24 provided in the vicinity of the center of the apparatus surrounded by the wire 21 and supplying a working liquid 25 containing free abrasive grains to the wire 21 and the workpiece to be cut in a shower shape.

In order to cut the work 23 to be cut with this apparatus, the roller 22 is rotated to run the wire, and the machining liquid 25 is showered from the shower nozzle 24 to the work 23 and the wire 21 to be cut. While being supplied, the workpiece 23 was pressed against the wire 21 to perform the cutting.

[0005]

However, in the above apparatus and method, the working fluid is supplied in a shower shape, a linear shape, or a strip shape, so that the working fluid travels down the surface and the cut surface of the workpiece to be cut and flows down. I will end up. Therefore, the flow of the working fluid depends on the shape of the workpiece to be cut.

For this reason, the amount of free abrasive particles (flow rate of the working fluid) entering the portion where the wire is pressed differs depending on the location, and the working fluid does not uniformly adhere to the wire and flows off in places. Therefore, unevenness occurred. Therefore, there is a problem that the processing accuracy of the workpiece to be cut is reduced.

Therefore, an object of the present invention is to solve the above-mentioned problems, and regardless of the shape of the workpiece to be cut, the working fluid can be uniformly supplied to the portion where the wire is pressed, and the wire-type cutting with high working accuracy is achieved. A method and a cutting device are provided.

[0008]

SUMMARY OF THE INVENTION To achieve the above object, the present invention runs a wire wound around a plurality of grooved rollers located at predetermined intervals, and cuts a workpiece to be cut into the wire. In the method of pressing by pressing against, the cutting fluid is cut while spraying a working liquid containing free abrasives to the wire and the work to be cut in a mist state.

Further, in a wire type cutting device for cutting a work to be cut by a plurality of grooved rollers positioned at predetermined intervals and a wire wound around these rollers, a processing including free abrasives Machining liquid ejecting means for ejecting the liquid in a mist state by the ejection nozzle is provided.

[0010]

According to the above construction, the working liquid can be sprayed in a mist state on the work to be cut, so that the working liquid can always be supplied uniformly regardless of the shape of the work to be cut and run down onto the wire. It can be applied uniformly so that it does not exist. Therefore, the processing accuracy can be improved.

[0011]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described below in detail with reference to the accompanying drawings.

First, an apparatus for carrying out the method of the present invention will be described.

As shown in FIG. 1, this device comprises three rollers 2 and a plurality of wires 1 wound around the rollers 2.
And a spray nozzle 6 for spraying the working liquid 5 containing free-abrasive grains in a mist state on the cut portion of the wire 1 and the workpiece 3 to be cut.

Here, the roller 2 has a plurality of grooves (not shown) on the surface thereof, and an actuator is provided so that it can rotate at a desired rotation speed. Also, the wire is
The grooves are arranged in the groove at intervals corresponding to the thickness of the cut workpiece cut out from the cut workpiece 3.

Therefore, by operating the actuator, the roller 2 can be rotated and the wire 1 can be run.

Further, the spray nozzle 6 is connected via a pipe 7 and a pump 8 to a tank 9 filled with the working fluid 5 located outside. Therefore, a desired pressure is applied to the working fluid 5 in the pipe 7 by the pump 8, and the spray nozzle 6
The machining fluid 5 flowing out of the can be sprayed in a mist state.

Next, the method of the present invention is carried out by the above apparatus.

First, the actuator 1 is operated so that the roller 2 rotates at a desired rotation speed according to the workpiece 3, and the wire 1 is run.

Next, the working liquid 5 is sprayed from the spray nozzle 6 onto the wire 1 and the workpiece 3 to be cut. At this time, the pressure applied to the working liquid 5 by the pump 8 is set so as to become a mist when flowing out from the spray nozzle 6. The workpiece 3 is cut by pressing the workpiece 3 against the wire 1 with a predetermined force while jetting the processing liquid 5.

According to the above method, since the machining liquid 5 is sprayed in the form of mist, the machining liquid 5 can be uniformly supplied to the work piece 3 to be cut, and the machining liquid 5 can be evenly supplied so as not to flow down to the wire 1. Since the processing liquid 5 can be attached, the loose abrasive grains can be uniformly and sufficiently supplied / drawn between the workpiece 3 to be cut and the wire 1. Therefore, the work to be cut can be cut accurately.

Further, since it is not necessary to drain a large amount of working fluid as in the conventional case, consumption of the working fluid can be greatly reduced. Further, unlike the conventional shower nozzle, it is not necessary to make the size equal to that of the workpiece, so that the space can be saved.

Another embodiment will be described.

In the above embodiment, the working fluid was jetted to both the wire and the work piece to be cut, but it may be jetted only to the wire to supply the loose abrasive grains between the work piece and the wire. .

Further, in the present invention, since the supply of the working fluid does not depend on the gravity fall, the spray nozzle may be provided not only above the workpiece to be cut but also in each direction.

Further, a plurality of spray nozzles may be provided,
In this case, since the free-abrasive grains can be supplied more sufficiently, further improvement in processing accuracy can be expected.

[0026]

In summary, according to the present invention, since the working liquid can be sprayed in a mist state to the work piece to be cut, the working liquid can be always supplied uniformly regardless of the shape of the work piece to be cut. It is possible to evenly attach the wire so that it does not run down. Therefore, the abrasive grains are sufficiently supplied to the cutting portion, and the processing accuracy can be improved.

[Brief description of the drawings]

FIG. 1 is a perspective view showing an embodiment of a wire type cutting device of the present invention.

FIG. 2 is a perspective view showing an example of a conventional wire-type cutting device.

[Explanation of symbols]

 1 Wire 2 Roller with Groove 3 Workpiece to be Cut 5 Working Liquid 6 Spray Nozzle

Claims (2)

[Claims] 1. A plurality of grooved rollers located at predetermined intervals.
In the method of running the wire wound around the wire and pressing the work to be cut against the above wire, cutting is performed while spraying a working liquid containing free abrasives on the wire and the work to be cut. A wire-type cutting method comprising: 2. A plurality of grooved rollers located at predetermined intervals.
In a wire-type cutting device for cutting a workpiece to be cut by a la and a wire wound around these rollers, a machining liquid ejecting means for ejecting a machining liquid containing free abrasive grains into a mist by an injection nozzle is provided. A wire-type cutting device characterized in that