JPH01257523A - Wire cut electric discharge machining - Google Patents

Abstract

PURPOSE:To reduce a drum shaped amount of a work during second cut by a method wherein cutting is effected on the reverse side to the desired side between first cut and second cut. CONSTITUTION:First cut 21 is effected by means of a wire 21a, and after that, intermediate cut 23 is effected by means of a wire 23a in a position close to the die side 12 being the reverse side to the punch side 11. The intermediate 23 is performed with the object of a fact that a distance between a wire 22a and a work is increased so that discharge of chips during is improved when second cut 22 is performed. Thereby, since, only in the region of a portion being the intermediate cut 23, a distance between the wire 22a and the die side 12 is increased, a region where machining flows is increased, and discharge of chips by means of machining liquid is smoothly performed. This constitution enables sharp reduction of a drum shaped amount of a work compared with that by a conventional method.

Description

[Detailed description of the invention] [Industrial application field] The present invention relates to a wire cut electrical discharge machining method.

[Prior Art] FIG. 3 is a diagram showing conventional finishing machining in a wire-cut electrical discharge machine.

In this figure, the trajectory of the wire 61a at the time of the first cut is shown by a dotted line, and after the first cut 61 is made, a second cut 62 is made with the wire 62a.This example shows punch processing, and the guide side The finishing process is performed by making a first cut toward the punch side 52, and then making a second cut toward the punch side 51.

[Problems to be Solved by the Invention] In the above conventional method, when performing the second cut 62, the distance between the wire 62a and the workpiece at the time of the second cut is short, and the passage through which the chip exits the workpiece is narrow, so that the chip is There are problems in that the workpiece is easily damaged, secondary discharge phenomenon occurs, and as a result, the amount of tension in the workpiece increases.

SUMMARY OF THE INVENTION An object of the present invention is to provide a wire-cut electrical discharge machining method that does not increase the amount of torsion of a workpiece during a second cut in wire-cut electrical discharge machining.

[Means for Solving the Problems] According to the present invention, a cut is made on the side opposite to the desired side between the first cut and the second cut.

[Function] In the present invention, the cut is made on the side opposite to the desired side between the first cut and the second cut, so that the amount of bending of the workpiece does not increase during the second cut in wire cut electrical discharge machining.

[Example] FIG. 1 is an explanatory diagram of an embodiment of the present invention.

This figure is a view seen from the same direction as Figure 3, and the processing is stopped in the middle of the first cut, the intermediate cart, which is a feature of the method of the present invention, is also stopped in the middle, and the second cut is also stopped in the middle. However, it is drawn to make it easier to see the states of the three cuts mentioned above. Note that FIG. 1 shows punching.

First, as in the conventional case, a first cut 21 is made with a wire 21a, and then an intermediate cut 23 is made with a wire 23a on the side opposite to the punch side 11 (on the goo side 12).

The intermediate cut 23 is performed for the purpose of widening the distance between the wire 22a and the workpiece in the second cut 22 in order to improve chip brushing when the second cut 22 is performed.

In the above case, first cut 21 and second cut 2
2 is the same as the conventional one, so there is no change in the contour of the workpiece in the necessary part (punch side 11) for punching (the desired shape can be obtained).

By the way, in the above embodiment, only the area of the intermediate cut 23 (the area indicated by the dotted line in FIG. 2) is the wire 22.
Since the space between a and the goo side 12 is widened, the area through which the machining fluid flows is expanded, and chips can be smoothly removed by the machining fluid. Therefore, the amount of tension is much smaller than in the conventional method. That is, in the above embodiment, the machining fluid and chips are efficiently released by an intermediate cut between the first cut and the second cut.

The above embodiment is an example of punching, and an intermediate cut is made closer to the goo side 12, but in the case of gouer work, an intermediate cut 23 is made closer to the punch side 11.

[Effects of the Invention] According to the present invention, in wire cut electric discharge machining, there is an effect that the torsion amount of the workpiece does not become thick during the second force y ).

[Brief explanation of the drawing]

FIG. 1 is an explanatory diagram of an embodiment of the present invention. FIG. 2 is a diagram showing the intermediate cut portion in the example shown in FIG. 1 with dotted lines. FIG. 3 is an explanatory diagram of a conventional machining method in wire cut electrical discharge machining. 11... Punch side, 12... Gui side, 21... First cut, 22... Second cut, 23... Intermediate cut. Patent applicant Sodick Co., Ltd. Agent Arata Yokubo −

Claims (1)

[Claims] A wire-cut electric discharge machining method characterized in that a cut is made on the opposite side to the desired side between the first cut and the second cut.