JPS62114826A - Wire electro-discharge machining - Google Patents

Abstract

PURPOSE:To dispense with a machine stop in the point midway in machining for preventing a drawing material from dropping, by installing a polygonal rotor consisting of an insulator which is interposed in the lower side of a workpiece, its axial center is moved together with the workpiece and rotated by a wire electrode. CONSTITUTION:Machining is advanced toward an arrow from a tooling hole 5 by movements of a table and a saddle, and when a wire electrode 3 comes into contact with a propeller-form insulating member 13, with the relative movement, this insulating member 13 is pressed and rotated centering on the pin 12 locked to a holding block 10. And, the insulating member 13 enters beneath a drawing material 2, whereby it is not dropped and held as it is even the drawing material 1 comes off a workpiece 1. Therefore, any damage to a device due to a drop of the drawing material 2 comes to nothing, thereby dispensing with a machine stop for drop preventive measures of the drawing material in the point midway in machining.

Description

DETAILED DESCRIPTION OF THE INVENTION [Industrial Field of Application] The present invention performs electrical discharge machining on a workpiece using wires and poles. Concerning improvement of wire electrical discharge machining method.

More specifically, it prevents the cutting material from falling just before the end of the cutting process, and prevents wire breakage and damage to the workpiece (both due to falling material and electrical discharge caused by deformation of the wire as the cutting material falls). There is no way to prevent this.

[Conventional technology]

Figures 4 and 5 show the conventional method, and in Figure 2, (l) is the workpiece to be cut, and (2) is the cutting material separated by wire discharge. , (3) is the wire electrode, (4) is the power supply die, (5) is the tooling hole that is the starting point of machining, (61 is the gap created by wire discharge, (71 is the magnet base υ, Fig. 5 In this case, A81 is a fixing plate, and (9) is a G-shaped blade force that tightens to fix the rigid material fi+ and the cut material (2).

The workpiece holder of a conventional electric discharge machine is as described above. For example, in Fig. 4, machining is performed from the tooling hole (5) in the direction of the arrow by controlling the movement of the table and saddle. Proceed, wire electrode (3)
In order to prevent the cutting material from falling after the
). However, in this case, the workpiece is limited to a magnetic material.

Next, Fig. 5 is a side view showing another method of the conventional method. 1-, tighten with a G-type vise (9) and remove the workpiece (2).
) to be fixed. In this case, non-magnetic materials are targeted.

[Problem that the invention seeks to solve]

In the conventional electric discharge machining method as described above, wire electrodes (3
), after passing the point to be held, the machine must be stopped to prevent an electric shock to the operator, so in addition to the problem of not being able to operate continuously, as shown in Figure 4. According to the method described above, the magnet (7) cannot withstand the weight of the cut material (2) and the cut material (2) falls when the workpiece i11 and the cut material (2) are separated from each other. dice(
There were problems such as damage to some of the mechanical devices such as 4).

This invention was made to solve these problems, and in addition to eliminating the need to stop the machine during processing, it also prevents the object to be charred from falling, regardless of whether it is magnetic or non-magnetic. The first goal is to do so.

[Failure to solve the problem]

In the electric discharge machining method according to the present invention, the workpiece and the cut material are
By wire electrical discharge machining.

A rotatable polygonal rotary body made of an insulating material is placed under the material to be carved so as to always support the material to be cut.

[Effect]

In this invention, the wire electrode is moved by a change in relative position to the workpiece due to the movement of the table and saddle while the workpiece is being heated by wire discharge.

A propeller-shaped insulating member on the underside of the workpiece is pushed and rotated to ensure that the cut material is always supported from below even after the wire electrode has passed.

〔Example〕

FIG. 1 is a three-dimensional diagram showing this invention, and FIG. 2 is a diagram showing one embodiment of this invention. In the figure fil~(6)
is the same as the above conventional method.

Further, (71 to (9)) will be omitted since they will be explained using the conventional method.

In the figure, α1 is the holder body and block, 011 is a bolt for fixing it to the workpiece, and α2 is a press-fit bottle.

αJ is a propeller-shaped insulating member that can rotate around the press-fit bottle aX5.

In the electrical discharge machining method configured as described above.

From the reeling hole (5), processing progresses in the direction of the arrow by controlling the movement of the table and saddle, and when the wire electrode (3) comes into contact with the propeller-shaped insulating member 031, the wire electrode (3) Along with the move.

Since the propeller-shaped insulating member Q3 is pushed and rotated, the B side shown in the propeller-shaped insulating member α3 goes under the cut material (2), and after machining is completed, the workpiece +
Even if the material 11 and the cut material (2) are separated, they can be held without falling. By the way, in the above explanation, the shape of the rotary body made of an insulator is cross-shaped, but in other shapes, the movement of the wire electrode due to the change in relative position to the workpiece due to the movement of the table and saddle causes 3. It goes without saying that as long as the rotating body can be easily rotated, there is no need to be particular about the shape of a cross.Furthermore, as an example of the shape of the propeller-shaped insulating member a3 in FIG.
A) to (d) are shown.

〔Effect of the invention〕

This invention has a simple structure as described above, and there is no need to stop one machine from the start to the completion of processing, and continuous operation can be performed.

Moreover, after the blade and the cutting material are separated, they do not fall, and the device is not damaged.

[Brief explanation of drawings]

FIG. 1 is a three-dimensional diagram showing the method of the present invention, FIG. 2 is a diagram showing a practical example of the invention, FIG. 3 is a diagram showing an example of the shape of a propeller-shaped insulating member, and FIGS. FIG. 5 is a diagram showing a conventional method. In the figure, (1) is the workpiece, (2) is the extracted material, and (3) is the workpiece.
is a wire electrode, (4) is a power supply die, (5) is a tooling hole, and (6) is a gap created by wire discharge. (7) is a magnet base, (8) is a fixing plate, (9) is a G-type vise, α1 is the holder body and block, all is a bolt, (Ia is a press-fit bottle, and αJ is a propeller-shaped insulating member. Note that the same reference numerals in each figure indicate the same or corresponding parts.

Claims (1)

[Claims] In the wire electrical discharge machining method of electrical discharge machining a workpiece using a wire electrode, the workpiece is formed of a pair of U-shaped cross-sectional holders and an insulator, and one of the pair of holders is , or both, and is interposed between the underside of the workpiece and one side of the underside of the holder, and is itself centered around the central axis, and is centered on the table and saddle. A propeller-shaped insulating member rotates by the wire electrode itself due to a change in the relative position of the wire electrode with respect to the workpiece due to movement, and a protruding portion of the propeller-shaped member holds the material extracted by wire discharge, A wire electrical discharge machining method that is characterized by preventing falling.