JP2000141133A - Wire electric discharge machine - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a wire electric discharge machine to prevent useless consumption of a wire. SOLUTION: In addition to an operator 31 to set the running speed of a wire 3 to an arbitrary value, a setter 37 is provided to set the running speed of the wire 3 to a predetermined speed, for example, 2 m per minute. The running speed of the wire 3 is set to a value set by the setter 37 when the starting switch 23 of a machining source 22 is in an opening state and set to a value set by the operator 31 when the starting switch 23 is closed. This way delays the running speed of the wire 3 withoput regulating the value of the operator 31 in a case of a work to determine the position in a machine coordinate system of a machining home position 0, and prevents useless waste of the wire 3.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a wire electric discharge machine provided with means for setting a traveling speed of a wire so that the traveling speed of the wire can be arbitrarily set.

[0002]

2. Description of the Related Art A wire electric discharge machine is an apparatus in which a wire and a workpiece are opposed to each other through a machining fluid, a voltage is applied between the two to discharge the workpiece, and the workpiece is processed using discharge energy. Such a wire electric discharge machine will be described with reference to the drawings.

FIG. 3 is a configuration diagram of a conventional wire electric discharge machine. In the drawing, reference numeral 1 denotes a frame of a wire electric discharge machine.
Reference numeral 2 denotes a Z-axis, which is supported on the frame 1 so as to be vertically movable. 3 is a wire. Reference numeral 4 denotes a wire reel wound around the wire 3 and is provided with rotation resistance by a brake (not shown). A roller 5 is rotatably supported by the frame 1. Reference numeral 6 denotes an upper guide which is held on the Z axis. Reference numeral 7 denotes a lower guide, which is held on the frame 1. A roller 8 and a winding roller 9 are rotatably supported by the frame 1 respectively. A motor 10 rotates the winding roller 9. Reference numeral 11 denotes a pressure roller which is urged by a spring 12 toward the winding roller 9. 13 is a bucket.

[0004] Reference numerals 20 and 21 denote energization terminals, which are connected to a processing power supply 22. Reference numeral 23 denotes a start switch of the processing power supply 22. Reference numeral 24 denotes a work, which is fixed to a table 25. The work 24 is connected to the processing power supply 22. The table 25 is mounted on an XY table (not shown) and is movable in the XY directions. Reference numeral 26 denotes a nozzle for supplying a processing liquid.

[0005] Reference numeral 30 denotes a control device which rotates the motor 10 at a speed set by the operating device 31 and a processing power supply 22.
, The start / stop switch 23, the XY table, and the supply / stop of the machining fluid. A short-circuit detection power supply 32 outputs a low voltage of about 10 V.
3 and connected to the wire 3 and the work 24.

Next, the operation of such a wire electric discharge machine will be described. The outer shape of the work 24 is the most general rectangular parallelepiped, and the distance between the processing origin O and two side surfaces orthogonal to the processing origin O is determined in advance. First, the work 24 is fixed to the base 25 so that the side surface is parallel to the X axis and the Y axis.
Next, the position of the machining origin O in the machine coordinate system (the coordinate system for moving the XY table) is determined (hereinafter referred to as origin finding operation). That is, the switch 33 is closed, a low voltage is applied between the wire 3 and the work 24, and the work 24 is moved in the X-axis direction to approach the wire 3. Then, the X coordinate of the side surface parallel to the Y axis of the work 24 is obtained by obtaining the position where the two contact each other (the voltage between the two becomes zero). Similarly, the Y coordinate of the side surface parallel to the X axis is obtained, and the position of the processing origin O in the machine coordinate system is obtained from the obtained two coordinate values. If the wire 3 is loose, an accurate position cannot be obtained. Therefore, at the time of finding the origin, the wire 3 is caused to travel for the purpose of applying tension to the wire 3.

Next, the feed rate of the wire 3 during processing is set by the operating device 31. The feed speed of the wire 3 is determined by the magnitude of the discharge energy, the thickness of the work 3, the material of the wire 3, and the like, and is usually set to 8 to 12 m per minute.
When a processing start button (not shown) of the control device 30 is turned on, the motor 10, that is, the winding roller 9 rotates, the wire 3 is pulled out from the wire reel 4 in a state where a constant tension is applied, and the processing liquid is supplied from the nozzle 26. Is done. Next, with the start switch 23 closed and the voltage intermittently applied between the wire 3 and the work 24, the work 24 is moved according to a program input in advance to process the work 24. The wire 3 used for processing is stored in the bucket 13.

[0008]

By the way, in a so-called setup operation before machining, various operations are performed in addition to the above-mentioned origin finding operation. Then, for example, the wire 3 for positioning the upper guide 6 in the height direction with respect to the work 24 is run. In such a case, the traveling speed of the wire 3 may be slow. However, the above operation is often completed in a few minutes, and the wire 3 is prevented from being broken during processing. However, the running speed of the wire 3 is often not changed before and after the above-mentioned operation for reasons such as disconnection of the wire 3 and time required to reset the wire 3). For this reason, the wire 3 was wasted.

It is an object of the present invention to provide a wire electric discharge machine capable of solving the above-mentioned problems in the prior art and preventing wasteful consumption of wires.

[0010]

In order to achieve the above object, a first aspect of the present invention is a wire discharger comprising a setting means for setting a traveling speed of a wire, wherein the traveling speed of the wire can be arbitrarily set. In the processing machine, when the processing power is off, the traveling speed of the wire is set to a predetermined speed instead of the speed set by the setting means.

According to a second aspect of the present invention, there is provided a wire electric discharge machine having setting means for setting a traveling speed of a wire, wherein the traveling power of the wire can be arbitrarily set. In this case, the traveling speed of the wire is set to a predetermined speed instead of the speed set by the setting means.

Further, the invention according to claim 3 is characterized in that the predetermined value is 3 m / min or less.

[0013]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS The present invention will be described below with reference to the illustrated embodiments. FIG. 1 is a configuration diagram of a wire electric discharge machine according to the present invention, and the same components or components having the same functions as those in FIG. In the figure, reference numeral 35 denotes a determiner which is arranged inside the control device 30 and determines the open / closed state of the start switch 23. A switch 36 switches between the operation device 31 and the setting device 37. Setting device 3
Reference numeral 7 is arranged inside the control device, and is set so that the traveling speed of the wire 3 is about 2 m / min.

Next, the operation of this embodiment will be described. FIG. 2 is a flowchart illustrating the operation of the above embodiment. When the traveling command of the wire is output, the judgment unit 35
Confirms the opening and closing of the start switch 23, that is, the machining power supply 2
2 is turned on (step S10).
0), when the start switch 23 is closed, the switch 36 is operated to set the speed of the motor 10 to the operation device 31 side (step S110), and then the process of step S130 is performed. When the start switch 23 is open, the switch 36 is operated to set the set speed of the motor 10 to the setting device 37 side (step S120), and then the process of step S130 is performed. In step S130, it is checked whether or not the wire traveling command is continuously output.
The processing of step 100 is performed, and if the instruction has been completed, the processing is terminated. As a result, the traveling speed of the wire 3 becomes the speed set by the operating device 31 when the machining power supply 22 is on, that is, during machining, and becomes the speed set by the setting device 37 when the machining power supply 22 is off.

In the above description, the setting device 37 is provided.
You may make it set as a parameter in the memory in C apparatus.

In the above, it has been confirmed in step S100 whether or not the machining power supply 22 is turned on.
In the case of the work of finding the origin, it is easier to increase the wire traveling speed. Therefore, when the processing power supply 22 is off and the short-circuit detection power supply is off, the set speed of the motor 10 may be set to the operation device 31 side.

The traveling speed of the wire set by the setting device 37 may be 3 m / min or less.

Further, the switching of the switch 36 may be switched depending on whether or not the automatic operation is being performed, instead of opening and closing the start switch 23 (turning on / off the processing power supply 22).

[0019]

As described above, according to the present invention,
In a wire electric discharge machine, comprising a setting means for setting a traveling speed of a wire, wherein the traveling speed of the wire can be set arbitrarily, when the machining power is off, the traveling speed of the wire is set by the setting means. Since the speed is set to a predetermined speed instead of the speed, the running speed of the wire becomes slow except at the time of processing, and wasteful consumption of the wire can be reduced.

[Brief description of the drawings]

FIG. 1 is a configuration diagram of a wire electric discharge machine according to the present invention.

FIG. 2 is a flowchart illustrating the operation of the embodiment.

FIG. 3 is a configuration diagram of a conventional wire electric discharge machine.

[Explanation of symbols]

 3 Wire 22 Machining power supply 23 Start switch 31 Operating device 37 Setting device

Claims (3)

[Claims] 1. A wire electric discharge machine comprising a setting means for setting a traveling speed of a wire so that the traveling speed of the wire can be set arbitrarily.
A wire electric discharge machine wherein a traveling speed of a wire is set to a predetermined speed instead of the speed set by the setting means. 2. A wire electric discharge machine comprising a setting means for setting a traveling speed of a wire, wherein the traveling speed of the wire can be arbitrarily set. A wire electric discharge machine wherein a speed is set to a predetermined speed in place of the speed set by the setting means. 3. The wire electric discharge machine according to claim 1, wherein the predetermined speed is 3 m / min or less.