JPS62102920A - Wire cut electric discharge machine - Google Patents

Abstract

PURPOSE:To control a position of an upper part nozzle agreeing with a change of plate thickness without a control program, by mounting a height sensor to a Z-axis of an electric discharge machine and providing a copying function which stores in memory a change quantity of a position of the Z-axis in accordance with the position of XY axes. CONSTITUTION:A height change signal can be input to a control unit of a wire electric discharge machine by mounting a height sensor 8 to a Z-axis 6, and an XY table 2 is moved so that a sensor point end part 9 comes to a machining start position. Next, the machine, moving the XY table by an XY control program, inputs a height change amount for XY coordinates to the control unit, and the point end part 9 is moved to the machining start position. And the machine, removing the sensor 8 and tensely mounting a wire electrode between an upper part nozzle 3 and a bottom part nozzle 4, performs machining by the XY control program by lowering the X-axis 6 to move the nozzle 3 approaching the upper surface of a work 1. Here the control unit of the machine outputs a change amount of plate thickness of the work, stored in memory in conformity to be position of XY axes, to the Z-axis, and a control is performed so as to hold a gap between the work 1 and the nozzle 3 continually to a fixed value.

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to a wire-cut electrical discharge machining device with a Z-axis control function.

[Conventional technology]

FIG. 2 is an explanatory diagram of a conventional wire-cut electric discharge machining device with two-axis control. In the figure, (1) is a workpiece, (2)
) is the processing table, (3) is the upper nozzle for the wire guide, (4) is the lower nozzle for the wire guide, (5) is the wire electrode for processing, (6) is the Z axis, and (7) is the processing fluid. be.

Next, the operation of the wire electrical discharge machine shown in FIG. 2 will be explained. The workpiece (1) placed on the XY machining table (2) is not moved on the XY machining table (2), so it is electrical discharge machined using the wire electrode (5) k. During machining, the pipe is stretched between the upper nozzle (3) and the lower nozzle (4), and machining is performed while the machining liquid (7) flows over the machining part of the workpiece (1). When machining, the higher the machining fluid pressure, the higher the machining efficiency, so the upper nozzle (3) must be placed as close as possible to the workpiece (1) with the screw.

[Problem that the invention seeks to solve]

Conventional wire-cut electrical discharge machining equipment has two methods for machining workpieces with varying thicknesses: one method is to fix the upper nozzle at the height of the thickest thickness of the workpiece plate; There is a method in which the height of the upper nozzle is changed by program control using a program created by a user in accordance with changes in thickness. The problem with the former is that in thin parts of the workpiece (1), the upper nozzle (3) is separated from the workpiece (1), which lowers the machining fluid pressure and lowers the machining efficiency. Moreover, the latter problem is undesirable because in the case of a workpiece with complicated changes in plate thickness, the burden of creating the entire program on the user is large.

This invention was made to solve the above-mentioned problems, and allows the user to process changes in plate thickness while controlling the position of the upper nozzle without having to create a two-axis control program. A wire-cut electrical discharge machining device that can be used for all purposes.

[Means for solving problems]

The wire-cut electric discharge machining apparatus according to the present invention has a height sensor attached to the Z-axis and a tracing function for storing the amount of change in the Z-axis position according to the XY-axis position.

[Effect]

This wire-cut electrical discharge machine with a tracing function allows the user to automatically control the position of the upper nozzle to machine workpieces of varying thickness simply by creating a program for XY-axis movement. It is something that makes it possible to do things.

[Embodiments of the invention]

Hereinafter, one embodiment of the present invention will be explained based on FIG. 1.

In Figure 1, (6) is the Z axis and (8) is the 2nd axis (6)
This is the height senna installed in the. Also height sensor (8
) at the tip (9). The tip (9) of the height sensor (8) is located between the center of the upper nozzle (3) and the center of the lower nozzle (4). It shall be at the intersection of the connecting straight line and the top surface of the workpiece.

Next, I will show you all the steps for machining using the wire electrical discharge machine V that has this function, and then explain how it works. conduct.

(1) Place the workpiece (1) on the XY table (2) as shown in FIG.

(2) Move the z-axis (6) to a position higher than the top of the workpiece (1).

(3) Attach the height sensor (8) to the Z-axis (6) as shown in Figure 1. This operation allows a height change signal to be input to the control device of the wire electrical discharge machine.

(4) Fully move the XY table (2) so that the tip (9) of the height sensor (8) is at the machining start position.

(5) XY control program V Move the small XY table. Through this operation, the change in height with respect to the XY coordinates is input to the control #J device (at this time, the two feet do not move).

(fij After the operation of (5) is completed, the sensor tip (9)
# to the processing start position! Let me do it.

(7) Remove the sensor (8) higher than the Z-axis (6) and wire formwork (5)': Upper nozzle (3) and lower nozzle (4)
Stretch it between.

(8) Z axis (6)? c Lower the upper nozzle (3) to bring it closer to the top surface of the workpiece (1).

(9) Execute the entire XY control program and perform machining. During this machining, the control device of the wire electric discharge machine outputs the thickness change of the workpiece memorized in (5) above to the z-axis according to the position of the XY axes (wire position), and changes the thickness of the workpiece ( 1)
All controls are performed to keep the gap between the upper nozzle (3) and the upper nozzle (3) constant at VC.

In the above embodiment, the height sensor (8) is of a removable type, but it may be attached to the Iz axis with I/C so that it rotates upwards on the Z axis with -1. Furthermore, even if the machine can be moved to a position that does not cause any inconvenience during machining, the machining process can be improved.
Is the worker performing wire electrical discharge machining? When performing workpieces with varying thicknesses, it is possible to easily maintain a constant distance between the upper nozzle and the top surface of the workpiece, so there is no need to create a complicated program for two-axis control, and wire discharge is possible. Processing efficiency can be increased.

[Brief explanation of drawings]

FIG. 1 is an explanatory diagram of an embodiment of the present invention (a wire-cut electrical discharge machining device), and FIG. 2 is an explanatory diagram of a conventional wire-cut electrical discharge machining device. In the figure, (1); constant plate thickness; A workpiece that is not (2
); XY table of wire electrical discharge machine (machining table'
), (31; Upper nozzle for wire, (4); Lower nozzle for wire, (5): Wire electrode, (6): Z axis, (7); Machining liquid, (8); Height sensor. The same reference numerals in the figures indicate the same or equivalent parts. Agent: Patent Attorney Masatoshi Sato

Claims (2)

[Claims] (1) In a wire electrical discharge machining device with a Z-axis control function, the change in the height direction (Z-axis direction) of the workpiece is detected using the Z-axis, and is stored along with the movement of the X-axis and Y-axis. A wire-cut electric discharge machining device characterized by having a tracing function. (2) The first aspect of the present invention is characterized in that it is equipped with a function similar to the control device of a wire electric discharge machine, and performs machining according to the coordinate positions of the X and YZ axes stored in the control device.
Wire-cut electrical discharge machining equipment as described in .