JPS62157725A - Three-point support guide of wire electric discharge machine - Google Patents

Abstract

PURPOSE:To prevent a movable member from being moved due to pressure fluctuations of a machining liquid by providing a machining liquid communicating path so that the pressure of the machining liquid injected into a guide section is applied to the side supporting the wire electrode of the movable member and also to the opposite side. CONSTITUTION:Compressed air is guided through an air hole 18 to move a piston 5 and a rod 4 to the right against a spring 17, and a wire electrode P is connected through the hole of a guide base 13, the hole of a V-groove- shaped guide 1 and a V-groove section. When the air is stopped, the piston 5 and rod 4 are moved to the left by the force of the spring 17, and an electrode P is pressed to the V-groove section by an electrode support member 10 via a leaf spring 11 and is supported at three points. When a machining liquid is injected through a guiding hole 14, it passes holes 14, 20, 21, 22 and is sprayed to an electric discharge machining area through the hole of a nozzle 3 and is also guided to a space section 9 through a hole 7, the same pressure is applied to both end faces of the rod 4, the force in the axial direction is made zero, thus no effect is given from pressure fluctuations.

Description

DETAILED DESCRIPTION OF THE INVENTION Field of Industrial Application The present invention relates to a guide for supporting a wire electrode in a wire electrical discharge machine, and particularly to a three-point support guide that supports a wire electrode 1 at three points. It is.

BACKGROUND OF THE INVENTION As guides for wire ffi[i provided above and below a workpiece, groove-shaped guides and die-shaped guides are known. ■
The groove-shaped guide is unstable because it supports the wire electrode at two points. Therefore, a three-point support guide is also known in which a movable member is provided at the opening of the groove-shaped guide and the wire electrode is supported at three points.

In this case, the movable member must be held at the wire electrode support position, and it is preferable that the movable member is moved and fluctuated by the pressure of the machining fluid injected into the guide section. do not have.

Problems to be Solved by the Invention The object of the present invention is to improve the above-mentioned prior art and provide a three-point support guide in which the movable member does not fluctuate due to the pressure of the machining fluid.

Means for solving the problem Providing a machining fluid conduction path so that the pressure of the machining fluid injected into the guide part is also applied to the end face of the movable member of the three-point support guide on the opposite side to the side that supports the wire electrode. This solved the above problems.

Even if fluctuations in the pressure of the machining fluid injected into the guide part act on the support surface of one member that suppresses and supports the wire electrode and try to change the pressing support force of the wire electrode, the wire of the movable member Since the pressure of the machining fluid is also applied to the end face opposite to the electrode support side, the pressure of the machining fluid applied to the movable member becomes zero, and the movable member does not move due to the pressure of the machining fluid, and the wire electrode is always supported with a constant supporting force. Press and support.

Embodiment FIG. 1 is a front sectional view of an embodiment of the present invention, and FIG. 2 is an explanatory view of the main parts of the three-point wire electrode support section in FIG. 1.

Reference numeral 1 denotes a V-groove-shaped guide with a hole in the center, and as shown in FIG. 2, a part thereof is formed in a substantially semicircular cross-sectional shape, and a V-groove portion 1a is formed in the center thereof. The V-groove guide 1 is fixed to the dicer 12 by bolts or the like through its 7 run 9 portions 1b, and the die base 2 is attached to the dicer 12 by accommodating the groove-shaped guide 1, A nozzle 3 is fixed to the tip of the die base 2. or,
The dizer 12 is fixed to the guide base 13 through bolt holes 25.

6 is a cylinder fixed to the die base 2, and a piston 5 is accommodated in the cylinder 6, and one end surface of the piston rod 4 fixed to the piston 5 faces the V-groove portion 1a of the V-groove guide 1. The plate spring 11 whose one end is fixed to the groove guide 1 is pressed, and the wire electrode P is moved to the groove guide by the supporting member 10, which is made of ruby or the like and which is fixed to the other end of the plate spring 11. 1 to support the wire electrode P at three points. Reference numeral 8 denotes a holding member which accommodates the end of the piston rod 4 opposite to the side supporting the wire Ti pole P and has a space 9 formed in its end surface, and the holding member 8 is screwed into the cylinder 6; A spring 17 is provided between the holding member 8 and the piston 5, and the spring 17 pushes the piston 5 to the left in FIG. 1, and pushes the piston rod 4 to the left in FIG. The wire electrode support member 10 is pressed against the force of the leaf spring 11 to suppress and support the wire electrode P.
This pressing force can be adjusted by rotating the holding member 8 and moving the screwing position with the cylinder 6 from side to side in FIG. 1 to adjust the force with which the spring 17 presses the piston 5. . Further, a hole 7 as a machining fluid conduction path is provided in the central shaft portion of the piston rod 4, and the wire hole 7 is inserted into the holding member from the peripheral surface facing the wire guide portion on the wire electrode support side of the piston rod 4. 8 to the end face facing the space 9, and the machining fluid injected into the guide portion is guided to the space 9 through the wire hole 7.

Note that the wire electrode support side of the piston rod and the space 9
The areas of both side end faces are formed to be equal. Further, a hole 24 is provided at the tip of the cylinder 6, and compressed air is introduced into the cylinder 6 through an air hole 18 provided in the dicer 12 and a hole 23 provided in the die base 2. When compressed air is introduced, the piston 5 and piston rod 4 are moved by the spring 1.
7 to the right in Figure 1. Reference numeral 14 denotes a machining fluid introduction hole provided in the guide base 13, and the machining fluid is supplied through the eye hole 14 and the hole 20 provided in the dizer 12.
, passes through a hole 21 provided in the angular portion 1b of the ViII-shaped guide guide 1, and a hole 22 provided in the die base 2, and is ejected from the nozzle hole of the nozzle 3 into the electrical discharge machining fr4 region. Note that 16 and 19 are air holes, 15 is a hole through which machining fluid is injected into the hole in the guide base 13 through which the wire electrode P passes, and W is a workpiece.

The operation of the embodiment with the above configuration will be described below.

First, when connecting the wire electrode P, compressed air is introduced from the air hole 18, and the piston 5. The piston rod 4 is moved to the right in FIG. 1 against the force of the spring 17.

As a result, the leaf spring 11 returns to its original position and the wire electrode support member 1
0 to the right in FIG. 1 to create a large gap between the groove-shaped guide 1 and the wire electrode support member 10. Then, the wire electrode P is connected to the hole of the guide base 13, the hole of the groove-shaped guide 1, and
The wires are connected through the groove 1a. After connecting the wires, the introduction of compressed air to the air hole 18 is stopped, and the force of the spring 17 moves the piston 5 and piston rod 4 to the left in FIG. 10, the wire electrode P is pressed against the groove 1a of the V-groove guide 1, and the wire electrode P is supported at three points. Then, when the machining fluid is injected from the machining fluid introduction hole 14, the machining fluid flows through the holes 14 and 20.
21.22 and is ejected from the nozzle hole of the nozzle 3 into the electrical discharge machining area, and also passes through the hole 7 provided in the center of the piston rod 4 and is introduced into the space 9 on the other end surface of the piston rod 4. Ru. As a result, the pressure of the machining fluid is applied to both end surfaces of the piston rod 4, making the areas of both end surfaces equal, so the force applied to the piston rod 4 by the machining fluid is zero in the axial direction of the piston rod 4. Therefore, even if the pressure of the machining fluid fluctuates, the piston rod 4 is held in place by the leaf spring 11. The force that presses the wire electrode P through the wire electrode holding member 10 remains constant without fluctuation.

In the above embodiments, the wire electrode support member 10 is pressed by the cylinder and piston mechanism to support the wire electrode P at three points, but the wire electrode support member 10 is not necessarily limited to the cylinder and piston mechanism. 10 so that the pressure of the machining fluid is applied equally to both end faces of the movable member that supports the wire electrode, on the wire electrode support side and the opposite end. The machining fluid is guided so that the pressure of the machining fluid is applied equally to both end faces of the movable member, and when connecting the wire electrode, the movable member is separated from the wire electrode support side using a solenoid, etc. The tension may be shifted in the opposite direction so as to increase the distance between the V-groove guide and the wire electrode holding member.

Effects of the Invention As described above, in the present invention, the pressure of the machining fluid is applied equally to both end surfaces of the movable member that presses and supports the wire electrode in the V-groove guide, so that the pressure of the machining fluid does not fluctuate. The force supporting the wire electrode does not change even when the wire electrode is supported, and the wire electrode can be supported at three points with constant force.

[Brief explanation of drawings]

FIG. 1 is a front sectional view of an embodiment of the present invention, and FIG. 2 is an explanatory view of the main parts of a three-point wire electrode support section.

Claims (4)

[Claims] (1) In a three-point support guide for a wire electrical discharge machine that supports a wire electrode at three points by a V-groove guide and a movable member, the end face of the movable member that presses and supports the wire electrode on the opposite side to support the wire electrode. A three-point support guide for a wire electrical discharge machine, characterized in that a machining fluid conduction path is provided so that the pressure of machining fluid injected into the guide portion is applied. (2) The movable member is formed of a piston rod, the machining fluid conduit is formed in the piston rod, and the end surface of the piston rod opposite to the side supporting the wire electrode is housed in a sealed space. A three-point support guide for a wire electric discharge machine according to claim 1, characterized in that: (3) The member forming the sealed space is fixed to a cylinder accommodating a piston to which the piston rod is fixed so as to be movable in the axial direction of the piston rod, and a spring is provided between the member and the piston. A three-point support guide for a wire electrical discharge machine according to claim 1. (4) The end surface of the piston rod on the wire electrode support side is
3. A wire electrical discharge machine according to claim 1, wherein a support member for supporting a wire electrode is fixed to one end and a plate spring is fixed to a guide member at the other end.
Point support guide.