JPH02167627A - Electric discharging machine equipped with plotting device - Google Patents

Abstract

PURPOSE:To confirm as to whether or not XY table is moved by a numerical control program as desired by providing a plotting device fitted with a telescopic instrument interlocked with XY table on the discharging machine working the body to be worked located on the XY table. CONSTITUTION:This discharging machine has a plotter having a pantograph 18 fitted by interlocking with the XY axialtable 2 which is driven in the XY axial direction according to a numerical control program and can plot by enlarging or contracting the movement of the XY axial table 2. Namely, if the working of the body 4 to be worked is fine, it is enlarged by the pantograph 18 and a plotting pen 19 draws the figure 20 of a working groove on a plotting paper 15 by enlarging the movement of the XY axial table 2. Also, if the working shape of the body to be worked is large, it is contracted by the pantograph 18 and the plotting pen 19 draws the figure 20 of the working groove on the plotting paper 15 by contracting the movement of the XY table 2. The pantograph 18 can select enlargement or contraction by changing the length of an arm.

Description

Detailed Description of the Invention [Field of Industrial Application] The present invention is an electric discharge method for machining a workpiece by applying a high voltage between a workpiece placed on an XY thin-axis table and a wire electrode. This relates to an electric discharge machine equipped with a drawing device that allows checking whether the XY-axis table on which the workpiece is placed moves as desired using a numerical control program. It is.

[Conventional technology]

In a wire-cut electrical discharge machine, a workpiece is placed on an xY-axis table that is moved by a numerical control program, and is movable relative to the wire electrode in a plane that intersects with the wire electrode. A high voltage pulse is applied from a power source between the wire electrode and the workpiece, and a discharge is generated between the wire electrode and the workpiece, thereby cutting the workpiece, for example.

[Problem to be solved by the invention]

However, in the conventional wire-cut electric discharge machine mentioned above,
In order to confirm whether the XY axis table on which the workpiece is placed moves as desired by the numerical control program, it is necessary to actually process the workpiece as a trial. Therefore, if the XY axis table does not move as desired, the material of the workpiece and the processing time are wasted.

In addition, as a solution to this problem, a device is already in use in which a drawing device is attached in conjunction with the XY axis table to draw the movements of the XY axis table, but the movement of the XY axis table is minute. In some cases, there was a problem in that the movement could not be sufficiently confirmed.

Conversely, if the movement of the XY-axis table in a large wire-cut electric discharge machine is sufficiently large, it is necessary to provide a large space for illustrating the movement.

Furthermore, in order to install a plotting device for plotting the XY-axis child table movement, space is required, but there are cases where it is not possible to provide enough space to install the plotting device next to the electrical discharge machine. There was a problem.

In order to solve the above-mentioned problems, the present invention is capable of drawing in a reduced size when the movement of the XY axis table is large, and on the other hand, in cases where the movement is minute, it is possible to draw the drawing in an enlarged manner. It is an object of the present invention to provide an electric discharge machine equipped with a drawing device that draws a drawing by enlarging or reducing the movement of an xY-axis table.

A further object of the present invention is to provide an electric discharge machine that is equipped with a drawing device that is vertically installed so as not to take up space and has a drawing device that has an enlargement/reduction function.

[Means to solve the problem]

In order to achieve the above object, the electric discharge machine of the present invention has a plotter having an expander attached in conjunction with an XY axes table that is driven in the XY axes directions according to a numerical control program. The structure is such that a drawing can be drawn by enlarging or reducing the movement of the table, and a drawing tool having an enlarger can be placed at an appropriate position.

[For production]

In the electric discharge machine having the above configuration, it is possible to draw a figure corresponding to the movement of the XY axis table in a desired size. Therefore, it is possible to draw an enlarged drawing in the case of fine processing, and a reduced drawing in the case of large processing.

〔Example〕

An embodiment of the present invention will be described with reference to FIG. FIG. 1 shows a schematic diagram of an embodiment of the present invention.

In Figure 1, 1 is the bed, 2 is the xY axis table,
An xY-axis table installed on a horizontal plane above the bed 1 can be freely moved in the X-axis direction and the Y-axis direction according to a numerical control program.

Reference numeral 3 denotes a workpiece mounting base fixed to the XY-axis table 2, on which the workpiece 4 is fixed by a fixture (not shown) as shown in FIG. Reference numeral 5 denotes a wire electrode, and the wire electrode 5 passes through an upper guide 6, an upper die guide 7, a processing groove 8 of the workpiece 4, a lower die guide 9, and a lower roller 10, and winds up the wire electrode (not shown). The device is wound and constantly supplied with fresh wire electrodes 5. 1
Reference numeral 1 designates an upper fixing arm to which an upper guide 6 and an upper die guide 7 are fixed via an upper guide mounting base 12. Reference numeral 13 denotes a lower fixing arm to which the lower die guide 9 and the lower roller IO are fixed.

A drawing table 14 is fixed to the bed 1, and a drawing paper 15 is placed on the drawing table 14.

A drawing arm 16 has one end fixed to the xY-axis table 2, and a pantograph 18 attached to the other end via a pantograph mount 17.

A drawing pen 19 is attached to the tip of the pantograph 18, and this drawing pen 19 draws a pattern 20 of a machining groove in proportion to the actual machining groove 8 on a drawing paper placed on the drawing table 14. Depicted on 15.

A high voltage pulse is applied to the wire electrode 5 and the workpiece 4 of the wire-cut electrical discharge machine having such a configuration, and the workpiece 4 is
For example, the grooves 8 are cut as shown in FIG.

However, before that, it is necessary to confirm whether the XY axis table 2 on which the workpiece 4 is placed moves according to the program as desired. Therefore, prior to cutting work, the drawing pen 19 moves in accordance with the movement of the XY axis table 2.
Let's try drawing it.

That is, if the processing on the workpiece 4 is fine, the pantograph 18 is used to enlarge the workpiece, and the drawing pen 19 is
The figure 20 of the machining groove is drawn on the drawing paper 15 by enlarging the movement of the XY axis table 2. Furthermore, if the machined shape of the workpiece 4 is large, it is reduced by the pantograph 18, and the drawing pen 19 draws the figure 20 of the machined groove on the drawing paper 15 by reducing the movement of the XY axis table 2. The pantograph 18 can be enlarged or reduced by changing the ratio of the lengths of its arms.

Although the pantograph 18 has been described as the expander, it goes without saying that the pantograph is not the only option, and any known expander can be used.

Next, another embodiment of the present invention will be described with reference to FIG.

FIG. 2 shows a schematic diagram of another embodiment of the invention.

In FIG. 2, 25 is an X-axis motor, and a motor drive shaft 26 is attached to the motor shaft, and the motor drive shaft 26 is provided with a screw of 26 degrees.

The screw 26° of the motor drive shaft 26 has an X-axis direction drive unit 2.
7 are fitted, and by the rotation of the X-axis motor 25,
An X-axis direction drive unit 27 attached to the X-axis table of the axis table 2 moves in the X-axis direction. Also, 2
8 is a Y-axis motor, and a motor drive shaft 29 is attached to the motor shaft.
is attached to the motor drive shaft 29, and a screw 29'' is attached to the motor drive shaft 29.
is provided. A Y-axis direction drive unit 30 is fitted into the screw 29° of the motor drive shaft 29, and the Y-axis motor 28
Due to the rotation, the Y-axis direction drive section 30 attached to the Y-axis table of the XY-axis child table 2 moves in the Y-axis direction.

Since the XY axis table 2 is fixed to the X axis direction drive unit 27 and the Y axis direction drive unit 30 as described above,
By rotating the shaft table 2, the X-axis motor 25, and the Y-axis motor 28, it can freely move in the XY-axis directions.

One X-axis drive pulley 3 is connected to the other end of the motor drive shaft 26.
1 is attached, and the other X-axis drive pulley 31 is further provided via a belt 31'. The other X-axis drive pulley 31 is provided with an X-axis magnification pulley 32. By providing these X-axis drive pulleys 31, it is possible to arrange the X-axis magnification pulley 32 at a position different from the position of the motor drive shaft 26. X-axis magnification pulley 32
A weight 36 is attached to the belt 33 wound around the belt 33 via X-axis pulleys 34 and 35.

) A drawing pen 37 is attached to the belt between the l pulleys 34 and 35.
is attached.

One YM drive pulley 3 is connected to the other end of the motor drive shaft 29.
9 is attached, and the other Y-axis drive pulley 39 is also provided via a belt 39°. The other Y-axis drive pulley 39 is provided with a Y-axis magnification pulley 40 having the same magnification as the X-axis magnification pulley. By providing these Y-axis drive pulleys 39, the Y-axis magnification boolean IJ 40 can be placed at a position different from the position of the motor drive shaft 29. The belt 41 wound around the Y-axis magnification pulley 40 is wound around the Y-axis pulley 42. A drawing paper drive shaft 43 is provided coaxially with the Y-axis pulley 42, and a drawing paper loading roller 44 on which the drawing paper 38 is placed is coaxially provided at the other end of this drawing paper driving shaft 43. .

For example, when expanding the movement of the XY axis child table 2, if the screw pitch of the motor drive shaft 26.29 is p and the diameter of the XY axis magnification pulley 31.40 is d, then for example, the screw pitch of the motor drive shaft 26.29 is p=
5 milJ, the diameter of the xY axis magnification pulley 31.40 is d = 15
．． If it is set to 92 mm, it becomes , which means that it has been enlarged about 10 times.

Furthermore, xY axis magnification boo! By replacing J31, 40 with ones of desired diameter, the drawing can be enlarged or reduced to a size that makes it easy to confirm the movement of the xY-axis table 2.

Furthermore, since the drawing device can be placed at any position, there is no need to provide extra space near the electric discharge machine for drawing.

〔Effect of the invention〕

According to the present invention, since a drawing device is provided with an enlarger attached in conjunction with the XY-axis table, even if the workpiece is minutely machined, the movement of the XY-axis table can be magnified and drawn. be able to. Therefore, it is possible to easily check whether the XY-axis table moves as desired by the numerical control program.

Further, even if the workpiece is to be machined on a large scale, the enlarger can be used to reduce the size of the workpiece and draw it. Furthermore, it is possible to obtain an electrical discharge machine equipped with a drawing device that does not require a special space.

[Brief explanation of the drawing]

FIG. 1 is a schematic diagram of one embodiment of the present invention, and FIG. 2 is a schematic diagram of another embodiment of the present invention. 1...Bed 2...XY-axis table 4...
・Workpiece 5... Wire electrode 8... Machining groove
14...Drawing table 15...Drawing paper 16
...plotting arm 18...pantograph 19...
Drawing pen 20...Figure of machining groove 25...X-axis motor 28...Y-axis motor 3■...X-axis drive pulley 32...X-axis magnification pulley 37...Drawing pen 38...・Drawing paper 39...
YIIll drive pulley 40...Y-axis magnification pulley

Claims (1)

[Scope of Claims] An XY-axis table driven in the XY-axis directions according to a numerical control program, a workpiece placed on the XY-axis table, and a wire electrode, the workpiece and the In an electrical discharge machine that processes a workpiece by applying a high voltage between a wire electrode, a drawing device having an expander attached in conjunction with the movement of the XY-axis table is provided, and the expander causes the An electric discharge machine equipped with a plotting device characterized in that the movement of an XY-axis table is enlarged or reduced and displayed.