JPS6236582Y2 - - 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
The housing 3 has a machining fluid reservoir 6 formed by the housing 3 and the die guide 4, and a linear injection portion that guides the machining fluid from the reservoir 6 and injects the machining fluid into the machining area of wire cut electrical discharge machining. A wire 2 is stretched over the center line of the hole 9 of the injection part. The machining fluid is guided by a conduit 10, passes through introduction channels 7 and 8 provided in the base 5 and the die guide 4, and is introduced into the machining fluid reservoir 6 formed by the housing 3 of the nozzle 1 and the die guide 4. Then, it is injected into the processing area from the hole 9 of the injection part of the nozzle 1 along the wire 2 which is secured by the die guide.

In a nozzle with a conventional structure as described above,
Since the joint surface a between the machining liquid reservoir 6 and the hole 9 of the injection part undergoes a sudden angle change, a separation phenomenon occurs, and the machining liquid flows out in a turbulent flow, making machining unstable and reducing 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 is a cross-sectional view of a nozzle that is an embodiment of the present invention, and the same members as in FIG. 1 are given the same reference numerals. Therefore, the difference between the present invention and the conventional example shown in FIG. 1 is that the surface of the housing 3 of the nozzle 1 that forms the machining liquid reservoir 6 is different. That is, in order to make the joint surface a between the machining liquid reservoir 6 and the hole 9 of the injection part smooth, to lengthen the straight part of the hole 9 of the injection part, and to increase the capacity of the machining liquid reservoir, a rebound part is formed. This is the point where b was formed.

Therefore, the machining fluid introduced from the conduit 10 is
The liquid passes through the introduction path 7 of the base 5 and the introduction path 8 of the die guide 4, flows into the machining liquid reservoir 6 formed by the die guide 4 and the housing 3, and then flows out through the hole 9 of the injection portion. , machining liquid reservoir 6 and injection hole 9
Since the joint surface with the is rounded and smooth,
The machining fluid is less likely to cause turbulence at this bending point, and since the straight part of the hole 9 in the injection part is formed long, the flow of the machining fluid is laminar, so it does not flow out from the hole 9 in the injection part. The processing fluid to be processed is not disturbed.
It is injected into the processing area along the wire 2. Furthermore, the present invention reduces the capacity of the machining liquid reservoir 6 by forming the straight part of the hole 9 of the injection part long and rounding the joint surface between the hole 9 of the injection part and the machining liquid reservoir 6. Since this is compensated for by providing the rebound portion b in the housing 3, the injected machining fluid is not disturbed, the machining becomes stable, and the machining speed can be increased.

[Brief explanation of the drawing]

FIG. 1 is a sectional view of a conventional nozzle structure, and FIG. 2 is a sectional view of an embodiment of the present invention. DESCRIPTION OF SYMBOLS 1... Nozzle, 2... Wire, 3... Housing, 4... Dice guide, 5... Base, 6... Machining liquid reservoir, 7, 8... Introducing part, 9... Hole of injection part, 10... Conduit, a... Joint surface, b... Rebound part.

Claims (1)

[Scope of utility model registration request] In a machining fluid injection nozzle of a wire cut electrical discharge machine that uses a die guide to tension the wire, the die guide is fitted into the housing of the nozzle, and machining is performed by the fitted die guide and the housing of the nozzle. The hole wall of the injection section and the housing wall of the nozzle form an acute angle at the joint between the hole of the injection section that forms a liquid reservoir and spouts machining fluid and is provided at the center of the nozzle. 1. A nozzle structure for a wire-cut electric discharge machine, characterized in that the joints are joined to form a rebound part in a machining liquid reservoir, and the joint parts are rounded and smooth.