JPS6125952Y2 - - Google Patents

Description

[Detailed Description of the Invention] The present invention relates to an improvement of a wire-cut electric discharge machine, and in particular, the machining accuracy and speed are improved by eliminating the bending of the wire electrode.

In a conventional wire-cut electric discharge machine, a wire electrode fed out from a feeding device is guided between a pair of guide members via a tension device and a plurality of roller guides. In order to improve machining accuracy and speed, it is essential that the wire electrode portion between the guide members be guided correctly and linearly without bending or bending. However, the wire electrode becomes bent due to passing through the roller guide after the tension device, and this cannot be removed satisfactorily.

The purpose of the present invention is to improve the above-mentioned drawbacks of the conventional technology and to correct the bending with a simple structure.A roller guide for removing the bending is provided just before the guide member, and a roller guide at the rear stage of the tensioner is installed. This method eliminates the drawbacks of the conventional device by winding and guiding a wire electrode around the curl removal roller guide so as to wind it in the opposite direction.

The present invention will be described in detail below based on embodiments shown in the drawings.

The figure is an explanatory diagram of a wire-cut electrical discharge machine according to an embodiment of the present invention, in which 1 is a wire electrode feeding device, and a wire electrode 2 made of a copper wire taken out from this device is given tension in a tension device 3, and is guided by a roller. 4, the wire electrode is directed to a roller guide 5 for removing bends in the wire electrode. 6 is an energizing device for energizing the wire electrode. The wire electrode 2 is guided through a roller guide 5 to a pair of guide members 7 and 8. The wire electrode 2 is stretched linearly between the guide members 7 and 8, which are arranged to sandwich the processing position, and passes through the workpiece 9. 10 and 11 indicate a feeding capstan and a pinch roller, 12 a roller guide, and 13 a winding device.

During processing, the feeding capstan 10 and the pinch roller 11 are operated to feed the wire electrode in the direction of the arrow, a predetermined voltage is applied between the workpiece 9 and the wire electrode 2, and the relative relationship between the workpiece 9 and the guide members 7 and 8 is The movement is identical to known devices.

In the present invention, the roller guide immediately before the guide member 7 on the feeding side, that is, the roller guide 5, is configured as a roller guide for removing the crookedness of the wire electrode 2.

That is, the direction of the wire electrode 2 is changed by the roller guide 4 at the rear stage of the tension device 3, and the wire electrode 2 is bent by the roller guide 4. However, the roller guide 5 guides the wire electrode 2 so that it is wound in the opposite direction to that of the guide 4. As a result, the curve formed in the guide 4 is removed by the roller guide 5. In the present invention, the wire electrode 2 is wound around the roller guide 5 for removing curls approximately one turn, but it may be wound around the wire electrode 2 more than one turn.

As explained above, the present invention provides delivery device 1
A first roller guide 4 that changes the feeding direction of the wire electrode 2 fed out by approximately 90 degrees, and a feeding direction of the wire electrode 2 whose feeding direction has been changed approximately 90 degrees by the first roller guide 4. In a wire cut electric discharge machine equipped with a second roller guide 5 that is turned approximately 90 degrees and guided to a guide member 7, the wire electrode 2 is
It is wound around the second roller guide 5 in a direction opposite to the winding direction around the roller guide 4, and has a function of causing the second roller guide 5 to change the feeding direction of the wire electrode 2 by approximately 90 degrees. Since it has the function of removing the bending of the wire electrode 2, it has the advantage that the bending of the wire electrode can be removed with an economical structure. Further, since the wire electrode 2 can be guided linearly with high accuracy between the guide members 7 and 8, there is also an advantage that processing accuracy and processing speed can be improved.

[Brief explanation of the drawing]

The figure is an explanatory diagram of a wire-cut electrical discharge machine that is an embodiment of the present invention. In the figure, 2 is a wire electrode, 4 is a roller guide, 5 is a roller guide for removing curves, 7 and 8 are a pair of guide members, and 9 is a workpiece.

Claims (1)

[Scope of utility model registration request] The wire electrode is guided from the feeding device through the tension device, the first roller guide, and the second roller guide to a pair of guide members placed between the processing position, and the wire electrode is fed while being guided. The wire-cut electrical discharge machine performs electrical discharge machining by performing relative motion between a wire electrode and a workpiece, wherein the second roller guide is disposed near an extension of a line connecting the pair of guide members, and the second roller guide is disposed near an extension line of a line connecting the pair of guide members, A roller guide is disposed near a line perpendicular to the extension line, the first roller guide turns the wire electrode approximately 90 degrees, and the second roller guide further turns the wire electrode approximately 90 degrees. In the wire, the second roller guide is provided immediately before the guide member, and the feeding direction of the wire is changed by the first roller guide. The electrode is wound around the second roller guide in a direction opposite to the winding direction around the first roller guide, so that the second roller guide is also used as a roller guide for removing curls in the wire electrode. A wire cut electrical discharge machine featuring the following.