JPS6236581Y2 - - Google Patents

Description

[Detailed description of the invention] The present invention provides a wire cut electric discharge machine.
The present invention relates to the structure of a machining fluid injection nozzle when a die guide is used.

The structure of a machining fluid injection nozzle for wire cut electric discharge machining using a die guide has conventionally been as shown in FIG. That is, nozzle 1
A housing 3, a machining fluid reservoir 6 formed by the housing 3 and the die guide 4, and a linear injection portion 9 that guides the machining fluid from the reservoir 6 and injects the machining fluid into the machining area of wire cut electric discharge machining. Consisting of
A wire 2 is stretched over the center line of the injection part 9. The machining fluid is then guided by a conduit 10,
The machining fluid passes through the machining fluid passage holes 7 and 8 provided in the base 5 and the die guide 4, and is guided to the machining fluid reservoir 6 formed by the housing 3 of the nozzle 1 and the die guide 4.
Next, it is injected from the hole of the injection part 9 of the nozzle 1 into the processing area along the wire 2 which is secured by the die guide.

In a nozzle with a conventional structure as described above,
When the machining fluid rotates in the machining fluid reservoir section 6 and flows out from the injection section 9, it is injected with strong rotation, and the machining fluid is disturbed and the joint surface a between the machining fluid reservoir section 6 and the injection section 9 suddenly As the angle changes, a separation phenomenon occurs and the machining fluid flows out in a turbulent flow. These causes make machining unstable and reduce machining speed.

SUMMARY OF THE INVENTION An object of the present invention is to provide a nozzle structure that eliminates turbulence of injected machining fluid during wire cut electric discharge machining using a die guide and enables high-speed machining.

Hereinafter, one embodiment of the present invention will be described in detail with reference to the drawings.

FIG. 2 shows an embodiment of the present invention, in which the same members as in FIG. 1 are given the same reference numerals. The main difference from the conventional example shown in FIG. 1 is that a machining liquid reservoir 6 is not provided. That is, the die guide 4 and the nozzle body 1 are provided with a machining fluid flow path hole 8, and the machining fluid flow path hole 8 and the hole of the machining fluid injection part 9 of the nozzle 1 are connected, and no machining fluid reservoir is formed between them. I did it like that. The machining fluid in the nozzle 1, which is comprised of the machining fluid flow path hole 7 and the die guide 4 provided in the base 5, the machining fluid flow path hole 8 provided in the nozzle body 1, and the hole in the machining fluid injection part 9, flows. Each inner diameter of the flow path is made to be approximately the same diameter.

With the above structure, the machining fluid is
Since there is no machining liquid reservoir, it does not rotate, and since the inner diameter of the machining liquid flow path is almost the same diameter, turbulence is less likely to occur. The liquid is no longer turbulent due to these causes, and machining becomes stable, allowing high-speed machining.

In addition, in the machining fluid flow path consisting of the machining fluid flow path holes 7 and 8 and the hole of the machining fluid injection part 9, the bending point of the flow path is rounded and smoothed, as shown by the symbol b in Fig. 2. If it is bent, the processing fluid will be less disturbed.

Furthermore, the direction in which the machining fluid is introduced into the nozzle is also
As shown in FIG. 2, it is preferable to introduce the wire from the feeding direction of the wire 2. That is, as shown in FIG. 2, the conduit 10 is provided so as to be parallel to the feeding direction of the wire 2, and furthermore, the machining fluid passage holes 7 and 8 of the base plate 5 and the die guide 4 are also arranged parallel to the feeding direction of the wire 2. By doing so, the machining fluid flow path has fewer bent portions, and by reducing the rotational moment of the machining fluid generated from the bent portions, turbulence of the machining fluid can be reduced.

As described above, the present invention has a nozzle structure that steadily and stably injects machining fluid into the machining area without disturbing the machining fluid in the wire cut electric discharge machine, so machining is stable. This allows processing speed to be increased.

[Brief explanation of the drawing]

FIG. 1 shows an example of a conventional nozzle structure, and FIG. 2 shows an example of the present invention. DESCRIPTION OF SYMBOLS 1... Nozzle, 2... Wire, 3... Housing, 4... Dice guide, 7, 8... Machining liquid channel hole, 9... Injection part, 10... Conduit.

Claims (1)

[Scope of utility model registration request] In a machining fluid injection nozzle for a wire cut electric discharge machine that uses a die guide for tensioning the wire, the fitting hole provided in the nozzle and the die guide are closely fitted, and the die guide and the nozzle body are closely fitted. , a machining fluid flow path hole having approximately the same diameter as the hole of the machining fluid injection part that injects the machining fluid is provided, and the machining fluid flow path hole is formed with a smooth arc-like curve at the bending point, and the machining fluid flow path hole is formed with a smooth arc shape at the bending point. A nozzle structure for a wire-cut electric discharge machine, characterized in that a machining fluid inlet of a flow path hole is opened in the same direction as the wire feeding direction.