JPH05269626A - Method and device for wire electric discharge machining - Google Patents

Abstract

PURPOSE:To facilitate maintenance by providing a weir board with a weir whose section is similar to that of the lower arm, so that the sludge produced by machining can be discharged from the weir to the outside of a machining tank together with the machining liquid for preventing it from staying between the weir board and the lower arm. CONSTITUTION:A device for wire electric discharge machining is provided with a machining tank 1 having an opening 2 on its wall surface, a weir board 5 which is parallel to the wall surface and can be superposed on the opening 2, and a seal 4 positioned between the wall surface and the weir board 5. Further, a lower arm 7 is penetrated through the machining tank 1 and the weir board 5; and wire electric discharge machining is carried out while relatively moving the lower arm 7 and the machining tank 1 in the perpendicular direction. In this case, a weir 6 whose section is similar to that of the lower arm 7 is provided to the weir board 5, and machining is carried out while discharging a machining liquid 8 through the outer circumference of the lower arm 7 toward the outside of the machining tank 1. Thus, maintenance can be facilitated, and machining accuracy can be enhanced.

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 machining method and a machining method in which a machining tank containing a machining fluid and a lower arm penetrating the wall surface of the machining tank are relatively moved in a perpendicular direction. Regarding the device.

[0002]

2. Description of the Related Art Japanese Patent Publication No. 3-41288 discloses a processing tank having an opening on a wall surface, a plate arranged parallel to the wall surface so as to overlap with the opening portion, and a plate arranged between the wall surface and the plate. A wire electric discharge machining in which the lower arm is penetrated through the machining tank and the plate through the seal, and the lower arm and the machining tank are relatively moved in the direction perpendicular to each other. Machine is disclosed. And according to this technology,
It was possible to downsize the device for performing wire electric discharge machining by immersing the work in the machining liquid.

[0003]

However, sludge generated by machining is caught in the seal portion, and smooth movement between the lower arm and the processing tank is obstructed to displace the lower arm. The processing accuracy sometimes decreased. Therefore, it was necessary to constantly perform maintenance inspections. It is an object of the present invention to provide a wire electric discharge machining method and device which can solve the above problems, can be easily maintained, and can improve machining accuracy.

[0004]

[Means for Solving the Problems] The above-mentioned problems are solved by providing a processing tank having an opening on a wall surface, a dam plate arranged parallel to the wall surface and overlapping with the opening part, and arranged between the wall surface and the dam plate. A wire electric discharge machine comprising a seal, wherein the lower arm is penetrated through the machining tank and the dam plate, and machining is performed while the lower arm and the machining tank are relatively moved in a perpendicular direction. The problem can be solved by providing the weir plate with a weir whose cross section is similar to that of the lower arm, and performing processing while flowing the working liquid from the outer periphery of the lower arm toward the outside of the processing tank.

[0005]

The sludge generated by the processing is discharged from the weir together with the processing liquid to the outside of the processing tank and does not remain between the dam plate and the lower arm. Therefore, the relative movement between the lower arm and the processing tank is always smooth.

[0006]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS FIG. 1 is a sectional view of a main part of a wire electric discharge machine showing an embodiment of the present invention, and FIG. 2 is a view on arrow A of FIG. In the figure, 1 is a processing tank, on which a work (not shown) is placed. 2 is an oval opening provided on the wall surface of the processing tank 1. Reference numeral 3 denotes a frame-shaped guide fitting, which is arranged on the outer periphery of the opening 2 and fixed to the wall surface of the processing tank 1 by a bolt (not shown). A seal 4 is arranged around the entire circumference of the opening 2. A barrier plate 5 is movable on the guide fitting 3. Reference numeral 6 denotes a weir provided in the central portion of the weir plate 5, which is formed in a shape similar to the cross section of the lower arm 7 and limits the amount of the working liquid 8 flowing out from the inside of the working tank 1. By the way, the size of the sludge generated by the processing is usually several μ to several tens of μ and is discharged from the processing tank 1 together with the processing liquid 8 at the end of the processing. However, according to the results of various processing experiments, it was found that a part of the generated sludge remains inside the processing tank 1, and when the sludges remaining inside the processing tank 1 combine, there is a lump of about 200μ. It was Therefore, in this embodiment, the distance G between the weir 6 and the lower arm 7 is 0.3 mm.
I am doing it. Due to the above-mentioned configuration, not only the sludge generated by the processing but also the sludge that has grown large by combining the sludges passes through the weir 6 together with the processing liquid 8 and the processing tank 1
Is discharged to the outside. Therefore, the weir 6 or the weir plate 5
The sludge does not stay between the lower arm 7 and the lower arm 7.
The machining liquid 8 that has passed through the weir 6 and discharged to the outside of the machining tank 1 is collected in a machining liquid tank (not shown) through a collection passage (not shown).

[0007]

As described above, according to the present invention, the sludge generated by the processing is discharged from the weir 6 together with the processing liquid 8 to the outside of the processing tank 1, and the weir plate 5 and the lower arm 7 are discharged.
It doesn't stay between and. Therefore, there is an effect that the maintenance is easy and the processing accuracy can be improved.

[Brief description of drawings]

FIG. 1 is a sectional view of a main part of a wire electric discharge machine showing an embodiment of the present invention.

FIG. 2 is a view on arrow A in FIG.

[Explanation of symbols]

 1 Processing Tank 2 Opening 4 Seal 5 Weir Plate 6 Weir 7 Lower Arm 8 Working Liquid

Claims (2)

[Claims] 1. A wire electric discharge machining method in which a lower arm penetrating a wall surface of a machining tank and a machining tank containing a machining liquid are moved relative to each other in a direction perpendicular to each other. A method of wire electric discharge machining, characterized in that the machining is performed while flowing a machining fluid from the machine to the outside of the machining tank. 2. A processing tank having an opening on a wall surface, and a dam plate arranged parallel to the wall surface and overlapping with the opening portion.
It is equipped with a seal arranged between the wall surface and the dam plate,
In a wire electric discharge machining apparatus that penetrates the machining tank and the dam plate to perform machining while relatively moving the lower arm and the machining tank in a direction perpendicular to each other, the dam plate has a cross section of the lower arm and A wire electric discharge machining apparatus, characterized in that a similar weir is provided to perform machining while flowing a machining fluid from the outer periphery of the lower arm toward the outside of the machining tank.