JPS6141686B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to an immersion type wire cut electric discharge machining apparatus.

Conventional immersion type wire cut electrical discharge machining equipment
As shown in FIG. 1, among a pair of upper and lower wire electrode guides that are arranged to sandwich the upper and lower sides of the workpiece 101 and form a wire cut processing section, a lower wire electrode guide 5 and an arm 2 for attaching the lower wire electrode guide
A part of it is placed inside the machining tank 8 and is immersed in the machining liquid. Further, a workpiece 101 and a surface plate 9 for mounting the workpiece 101 are also set in the machining fluid. Note that 3 and 4 are guide rollers attached to the arm 2, and 6 is an upper wire electrode guide arranged above the surface of the machining liquid.
7 indicates a guide roller. Although not shown, the wire electrode 1 is produced by a supply drum and a collection drum that supply and collect the wire electrode, which are attached to a column that stands up on the machine stand, and a wire electrode supply and collection mechanism.
From supply drum to guide roller 3 → guide roller 4
→ Lower wire electrode guide 5 → Upper wire electrode guide 6 → Guide roller 7 before reaching the collecting drum and being wound up. Arm 2 is mounted on the column. Further, the machining tank 8 and the surface plate 9 are installed on an NC table (not shown) provided on the machine stand, and the machining shape 10 of the workpiece 101 is
A control device (not shown) controls the trajectory so as to draw a trajectory corresponding to 2.

In the conventional immersion type wire-cut electrical discharge machining apparatus as described above, since the arm 2 and the lower wire electrode guide 5 are provided in the machining tank 8, the machining tank 8 becomes larger than necessary compared to the workpiece 101. As a result, the capacity of the supply pump for supplying the machining fluid and the volume of the machining fluid recovery tank increase, resulting in increased costs. Furthermore, since the volume of the machining fluid in the machining tank 8 is large, the capacity of the drive motor for the NC table attached to the machining tank 8 increases, which increases equipment costs and running costs. Further, since a part of the arm 2 is immersed in the machining liquid, it is susceptible to electrolytic corrosion.

The present invention has been made to solve the above problems, and it reduces equipment costs and running costs, eliminates the problem of electrolytic corrosion, facilitates additional installation on existing machines, and improves machining accuracy. The object of the present invention is to obtain an improved immersion type wire cut electrical discharge machining device.

The present invention has been made to achieve the above object, and includes a machining tank having an opening at the bottom that is larger than the machining shape of the workpiece and smaller than the lower outer shape of the workpiece, and A wire electrode that runs within the range of the opening in the machining liquid, and a pair of upper and lower wire electrode guides that hold the wire electrode outside the tank, and the workpiece is placed in the processing tank so as to cover the opening. The present invention provides an immersion type wire cut electric discharge machining apparatus which is detachably attached to the bottom of the apparatus.

FIG. 2 is a perspective view showing an embodiment of the present invention.
In the figure, 1 is a wire electrode, and 2 is an arm, which is not shown but is attached to a column that stands up on a machine stand, similar to the conventional device shown in FIG. 3 and 4 are guide rollers, 5 is a lower wire electrode guide, 5A and 5B are machining fluid inlet and outlet nozzles provided on the lower wire electrode guide 5 are upper wire electrode guides, 6A and 6B are upper wire electrode guides 6 is an inlet nozzle and an outlet nozzle for machining liquid, 7 is a guide roller, and 8 is a guide roller.
8A and 8B are machining fluid inlet and outlet nozzles provided in the machining tank 8, and 9 is a surface plate, which is not shown but is mounted on an NC table provided on the machine stand. 10 is the bottom plate of the processing tank 8; 10A is an opening of a wire electrode having an arbitrary shape smaller than the external shape of the workpiece 101 and larger than the processing shape 102; the processing tank 8 and the bottom plate 1 of the processing tank 8;
0 is attached to a surface plate 9, and this surface plate 9
Since it is attached to an NC table, it is controlled by a control device (not shown) so as to draw a locus that matches the machining shape 102 of the workpiece 101, similar to the conventional device shown in FIG. Note that the workpiece 10
1 is detachably attached to the bottom of the processing tank 8 so as to cover the opening 10A. Further, since the route of the wire electrode 1 is exactly the same as that of the conventional device shown in FIG. 1, the explanation thereof will be omitted. In addition, in the apparatus of this invention, as the processing progresses, the bottom plate 10 of the processing tank 8
It goes without saying that since the machining fluid leaks little by little from the opening 10A, it is possible to supply more machining fluid into the machining tank 8 than this leakage. That is, during processing, the liquid level in the processing tank 8 is always maintained at a position such that the workpiece 101 is completely submerged. Further, it is sufficient that the size of the processing tank 8 is slightly larger than the planar shape of the workpiece 101 and has a height that allows complete immersion.

In addition, in the embodiment described above, the processing tank 8 and the processing tank 8
Although the bottom plate 10 has been described as being separate, it goes without saying that these may be of integral construction.

As is clear from the above, this invention has the lower wire electrode guide and the arm to which it is attached placed outside the machining fluid, which reduces the size and weight of the machining tank, and enables the supply pump and recovery of the machining fluid. The tank becomes smaller and the drive motor for the NC table can also be made smaller, which has the effect of lowering equipment costs and running costs. In addition, since the arm and surface plate are placed outside the machining fluid, the problem of electrolytic corrosion is eliminated. Furthermore, since it has a structure that allows it to be easily and quickly mounted on the surface plate of a conventional NC table, additional mounting on existing machines is also easy. Furthermore, since the workpiece is immersed in the machining liquid for machining, vibrations of the wire electrode during machining can be damped and machining becomes stable, resulting in improved machining accuracy.

[Brief explanation of the drawing]

FIG. 1 is a perspective view showing an example of a conventional immersion type wire cut electric discharge machining apparatus, and FIG. 2 is a perspective view showing an embodiment of the present invention. In the figures, the same reference numerals indicate the same or equivalent parts, 1 is a wire electrode, 2 is an arm, 5 is a lower wire electrode guide, 6 is an upper wire electrode guide, 8 is a processing tank, 9 is a surface plate, and 10 is a Processing tank bottom plate, 10A
is the opening of the wire electrode provided in the bottom plate, 101
is the workpiece, and 102 is the processed shape of the workpiece.

Claims (1)

[Claims] 1. A machining tank having an opening at the bottom that is larger than the machining shape of the workpiece and smaller than the lower outer shape of the workpiece, and a machining tank that runs through the machining liquid in the machining tank within the range of the opening. and a pair of upper and lower wire electrode guides that hold the wire electrode outside the processing tank, and the workpiece is detachably attached to the bottom of the processing tank so as to cover the opening. An immersion type wire cut electric discharge machining device characterized in that it can be installed.