JPS6190827A - Wire-cut electric discharge machine - Google Patents

Abstract

PURPOSE:To stabilize the discharging condition between a work and a wire electrode while to cool the wire electrode by providing means for inclining nozzle for ejecting working liquid along the wire electrode in two perpendicularly crossing directions. CONSTITUTION:A working liquid ejection nozzle 14 can be inclined in perpendicular direction against X-axis around a supporting point P or substantial fulcrum by means of a control motor 22 while in perpendicular direction against Y-axis around the supporting point P or substantial fulcrum by means of a motor 23. Since the nozzle 14 can be inclined with correspondence to the inclined angle of the wire electrode 5, the working liquid can be ejected at any time along the travel direction of wire electrode 5. While a guide tube 25 is provided with working liquid flow-in hole 27... and a portion of working liquid to be led through working liquid lead-in port 24 and a flow-in port 27 into the guide tube 25 will improve the cooling effect of wire electrode 5.

Description

DETAILED DESCRIPTION OF THE INVENTION (Industrial Application Field) The present invention relates to a wire cant electric discharge machining apparatus, particularly a wire cant electric discharge machining apparatus configured to control the inclination angle of a wire electrode for cutting a workpiece by electric discharge machining. ? Ear cuff 1 - Electrical discharge machining At our company, we have a wire-cut electric discharge machining device in which machining fluid is always supplied along the wire electrode by controlling the supply direction of machining fluid in accordance with the inclination angle of the wire electrode. It is related to.

(Prior Art and Problems to be Solved by the Present Invention) Generally, in a wire-cut electric discharge machining apparatus, as shown in FIG. By moving the electrode guide device 8 and the electrode guide device 9 in two directions,
The inclination angle of the wire electrode 5 between the workpiece 4 and the workpiece 4 is controlled.
It is designed to cut at any angle. Also,
Although not shown, a machining fluid spray nozzle is provided for supplying machining fluid to the portion where cutting is being performed. The purpose of supplying the machining fluid is to stabilize the discharge state between the workpiece 4 and the wire electrode 5 and to cool the wire electrode 5. Therefore, it is necessary to supply a sufficient amount of machining fluid to the cutting portion.

In a conventional wire-cut electrical discharge machining device, the direction of the machining fluid spray nozzle, that is, the machining fluid jet direction, is generally set in a fixed direction (usually a vertical direction). Therefore, when cutting is performed with the wire electrode 5 tilted as shown in FIG. Not only is the cooling effect of the wire electrode 5 reduced, but also the supply of machining fluid to the cutting portion becomes insufficient, resulting in an undesirable problem that the discharge state becomes unstable.

(Means for Solving the Problems) The present invention aims to solve the above problems, and therefore, the wire-cut electrical discharge machining apparatus of the present invention has an upper guide and a lower guide that support a wire electrode. and a guide drive device that moves at least one of the wire electrodes in two orthogonal directions, and the wire electrode between the upper guide and the lower guide is moved by the guide drive device to move the upper guide and/or the lower guide. In the wire-cut electric discharge machining apparatus configured to control the inclination angle of the upper guide and/or the lower guide, the machining liquid is configured to be tiltable on the guide device main body of the upper guide and/or the lower guide, and the machining liquid is sprayed along the wire electrode. In addition to being equipped with a spray nozzle, the machining fluid spray nozzle includes:
It is characterized in that it is configured to be tilted by a nozzle tilting device that tilts the machining fluid injection nozzle in two orthogonal directions.

(Embodiments of the Invention) Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings.

FIG. 1 is an explanatory diagram for explaining the overall configuration of an embodiment of the wire-cut electrical discharge machining device of the present invention, and FIG. 2 is an explanatory diagram for explaining an embodiment of the electrode guide device of the present invention. Figure 2 (A) is a front view, Figure 2 (B) is a front view, and Figure 2 (B) is a front view.
) is a plan view, and Fig. 2 (C) is a plan view of Fig. 2 (B).
A cross-sectional view at A, FIG. 2 CD) is a cross-sectional view taken along arrow B-B in FIG.

First, the basic structure and operation of an embodiment of the wire-cut electrical discharge machining apparatus of the present invention will be explained with reference to FIG.

In FIG. 1, a processing table 1 is driven by control motors 2 and 3 in orthogonal X and Y directions. Cutting process on the workpiece 4 placed on the processing table 1
The wire electrode 5 is wound from the wire electrode supply roller 6 via the tension roller 7, the electrode guide devices 8 and 9, and the tension roller 10 onto the scrap roller 11. That is, the wire electrode 5 between the electrode guide devices 8 and 9 is connected to the tension rollers 7 and 1.
The tension is applied by 0, and it is made to run in a straight line. The electrode guide device 8 and/or 9 is provided with a machining fluid injection nostle 14 for supplying machining fluid to the machining portion, as will be described later with reference to FIG.

Further, since the electrode guide device 8 is configured to be moved by the control motors 12 and 134 in two orthogonal directions (for example, a direction corresponding to the iY direction that is the driving direction of the processing table 1), The angle of inclination of the wire electrode 5 between the electrode guide devices 8 and 9 can be controlled as desired. Therefore, the workpiece 4 placed on the processing table 1 can be cut in a straight line. If there is, the control motors 2 and 3 that drive the processing table 1 and the control motors 12 and 13 that move the electrode guide device 8 are controlled by, for example, NC control based on a predetermined program. ,
Desired cutting can be performed automatically.

In the cutting process described above, as explained at the beginning of this specification, how effectively the machining fluid is supplied depends on
This will be an important issue. In the present invention, the jetting direction of the machining fluid sprayed from the machining fluid spray nozzle 14 (shown in FIG. 2) provided in the electrode guide device 8 and/or 9 is made variable so that the machining fluid always flows along the wire electrode 5. The machining fluid is sprayed by A detailed explanation will be given below with reference to FIGS. 2 and 3. In addition, the code 1 in the figure
4 is a machining fluid injection nozzle, 15 is a guide device main body, 16 is a bracket, 17 is a ring body, 18 and 18' are ring tilting shafts, 19 is a nozzle support arm, 20 and 20'
21 is a bellows, 22 and 23 are control motors, 24 is a machining fluid inlet, 25 is a guide cylinder, 26 is a guide, and 27 is a machining fluid inlet.

In FIG. 2, a guide 26 provided at the tip of the guide tube 25 supports the wire electrode 5, and as shown in an enlarged view in FIG. It is formed in a so-called die shape with corresponding die holes. In addition, if the manner in which the wire electrode 5 is supported is to be described accurately, it can be said that the wire electrode 5 is supported at a point P (hereinafter referred to as a support point P) shown by an arrow in FIG. Then, the machining fluid is fed under pressure from the machining fluid inlet in the direction of the arrow shown in the figure, and is sprayed along the wire electrode 5 by the machining fluid spray nozzle 14 . In the present invention, in order to always make the injection direction of the machining liquid injected from the machining liquid injection nozzle 4 coincide with the traveling direction of the wire electrode 5, the machining liquid injection nozzle 14 is connected to the wire electrode 5. It is equipped with a nozzle tilting device that tilts the nozzle in accordance with the inclination angle.

The nozzle tilting device referred to in the present invention is constituted by the bracket 16 shown in FIG. 2 or the control motor 23. That is, a ring tilting shaft 18.18' is rotatably supported by a bracket 16 provided on the guide device main body 15, and the ring tilting shaft 18.18'
A ring body 17 is fixed to. The control motor 22 rotates the ring tilting shaft 18'.

Further, arm tilting shafts 20 and 20' are rotatably supported on the ring body 17, and the arm tilting shafts 20 and 20' are rotatably supported.
A nozzle support arm 19 fixed to the machining fluid injection nozzle 14 is fixed to 20'. And the control motor 23
is for rotating the arm tilting shaft 20'. Further, the snake 1!21 is used to flexibly connect the machining fluid injection nozzle 14 to the nozzle device main body 15 to prevent machining fluid from leaking. The center line of the ring tilting axis 18, 18' (indicated by the arrow X in the figure, hereinafter referred to as the X-axis) and the center line of the arm tilting axis 20, 20' (indicated by the illustrated arrow y, hereinafter referred to as the y-axis). Guide 26
(To be exact, the support point P in the guide 26 shown in FIG. 3) is configured to be perpendicular to each other.

Therefore, by the control motor 22, the machining fluid injection nozzle 14 is moved to the X
It is possible to tilt in a direction perpendicular to the axis, and at the same time, the control motor 23 allows the machining fluid injection nozzle 14 to be tilted in a direction perpendicular to the y-axis using the support point P as a substantial fulcrum. Is possible.

That is, as shown in FIG. 3, for example, since the machining fluid spray nozzle 14 can be tilted in accordance with the inclination angle of the wire electrode 5, the machining fluid is always directed in the running direction of the wire electrode 50. It can be sprayed along. In addition, as shown in FIG. 3, the guide tube 25
machining fluid inlet holes 27, 27, . . . are formed in the machining fluid inlet holes 27, 27, . 27.2
By flowing into the guide cylinder 25 from 7, . . . , the cooling effect of the wire electrode 5 can be increased.

(Effects of the Invention) As explained above, according to the present invention, it is possible to control the injection direction of the machining fluid in accordance with the inclination angle of the wire electrode, and the machining fluid is always directed along the running direction of the wire electrode. By spraying, not only is the machining liquid sufficiently supplied to the cutting part, but also the cooling effect of the wire electrode can be greatly improved.

[Brief explanation of the drawing]

FIG. 1 is an explanatory diagram for explaining the overall configuration of an embodiment of the wire-cut electrical discharge machining device of the present invention, and FIG. 2 is an explanatory diagram for explaining an embodiment of the electrode guide device of the present invention. Figure 2 (A) is a front view, Figure 2 (B) is a front view, and Figure 2 (B) is a front view.
) is a plan view, and Fig. 2 (C) is a plan view of Fig. 2 (B).
2(D) is a sectional view taken along arrow B-B in FIG. 2(B); FIG. . In the figure, 1 is a processing table, 2.3.12.13.22 and 23c' are control motors, 4 is a workpiece, 5 is a wire electrode, 6 is a wire electrode supply roller, 7 and 10 are tension rollers, 8 and 9 are electrode guide devices, 11 is a scrap roller, 14 is a machining fluid injection nozzle, 15 is a guide device main body, 16 is a bracket, 17 is a ring body,
18 and 18' are ring tilting shafts, 19 is a nozzle support arm, 20 and 20' are arm tilting shafts, 21 is a bellows,
24 is a machining fluid inlet, 25 is a guide tube, 26 is a guide,
27 represents a machining fluid inflow hole. Patent applicant: Discharge Precision Machining Institute Co., Ltd. Representative Patent Attorney Mori 1) Hiroshi (3 others) Sai 1 Figure

Claims (1)

[Claims] A guide driving device is provided for moving at least one of an upper guide and a lower guide supporting a wire electrode in two orthogonal directions, and the upper guide is moved by the guide driving device moving the upper guide and/or the lower guide. In the wire cut electric discharge machining apparatus configured to control the inclination angle of the wire electrode between the upper guide and/or the lower guide, the wire electrode is configured to be tiltable on the guide device main body of the upper guide and/or the lower guide. A machining fluid injection nozzle is provided for injecting machining fluid along the machining fluid jet nozzle, and the machining fluid jet nozzle is configured to be tilted by a nozzle tilting device that tilts the machining fluid jet nozzle in two orthogonal directions. Characteristic wire cut electrical discharge machining equipment.