JPS6335365B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention provides an electric discharge machining apparatus, in particular, a machining liquid is interposed between an electrode and a workpiece facing each other, and a machining voltage higher than a dielectric breakdown voltage is applied between the electrode and the workpiece. The present invention relates to an electric discharge machining apparatus that applies electric discharge energy to generate electric discharge between the electrodes and performs electric discharge machining using this electric discharge energy.

In this type of electrical discharge machining equipment, the part where the workpiece is placed and filled with machining fluid, that is, the machining tank, is
Doors that can be opened and closed on the front and sides are provided for loading and unloading workpieces. Generally, the general procedure for electrical discharge machining is to open the machining tank door, place the workpiece in the machining tank, and close the door. Next, the workpiece is filled with machining liquid and applied with a machining voltage to process the workpiece into a predetermined shape, after which the workpiece is discharged, the door is opened, and the workpiece is carried out. During the process of opening the door at the end of machining in this work procedure, even though the machining fluid in the machining tank was drained, some of the machining fluid adhered to the inner wall of the machining tank, and naturally it also adhered to the inner wall of the door. As a result, when the door was opened, the machining fluid that had adhered to the inner wall began to fall from the bottom of the door, contaminating the operator, the machine body of the electrical discharge machining device, and the work floor. Therefore, the current situation is for the operator to leave the door slightly open and wipe the machining fluid from the bottom of the door with a cloth, etc., to prevent the above-mentioned parts from getting dirty, which improves the workability of electrical discharge machining. It is also one of the reasons why it is bad.

The present invention has been made in view of the above-mentioned conventional problems, and its purpose is to provide an electric discharge machining device that can prevent machining fluid from falling from the machining tank door in order to improve the workability of electric discharge machining. It is in.

In order to achieve the above object, the present invention provides a machining tank main body of an electrical discharge machining device that performs electrical discharge machining by placing a workpiece in place and filling it with a machining fluid, and a workpiece that is installed on the machining tank main body via a hinge. A door for loading and unloading goods,
A substantially U-shaped gutter is provided at the lowest part of the outside of the processing tank of the door and receives the processing liquid adhering to the door, and a substantially U-shaped gutter is installed at a position below the substantially U-shaped gutter of the processing tank main body,
The apparatus is characterized in that it includes a saucer for receiving the machining fluid flowing out from the substantially U-shaped gutter, and the substantially U-shaped gutter is inclined downward in the direction of the hinge of the door.

Hereinafter, preferred embodiments of the present invention will be described based on the drawings. FIG. 1 is a sectional view showing a first embodiment of the present invention with the processing tank door closed. In FIG. 1, a door 1 is attached to a processing tank 2 with a hinge and a punch lock (both not shown). The packing 3 is attached to the door 1 by the block 4 and is pressed against the side wall of the machining tank 2, and the machining fluid (not shown) is pressed against the side wall of the machining tank 2.
is sealed. The substantially U-shaped gutter 5 is installed at the bottom of the door 1 via a support plate 6, and this substantially U-shape is configured to be inclined downward in the hinge direction, as will be described later. 7 is a receiving tray for the machining liquid falling from the approximately U-shaped gutter 5. As is clear from this figure, even when the machining fluid in the machining tank is drained, A
The machining fluid still remains in the area.

FIG. 2 is a sectional view showing a state in which the door of the first embodiment of the present invention is opened. Machining fluid that adheres to door 1 or remains in section A in Figure 1 (not shown)
is guided to a substantially U-shaped gutter 5 along the packing 3, the bottom of the door 1, and the support plate 6 as shown by the arrow. Since the door 1 is attached to the processing tank 2 by a hinge 8, the door 1 is attached with an inclination toward the hinge 8.
The machining fluid guided into the U-shaped gutter 5 flows along the slope in the direction of the hinge 8 and falls into the saucer 7 at the end of the substantially U-shaped gutter 5 as shown by the arrow. In this way, the door 1 rotates around the hinge 8, and even at a rotation angle where it is removed from the tray 7, the machining fluid can be collected in the tray 7 along the above-mentioned route.

FIG. 3 is a cross-sectional view of a second embodiment of the present invention with the door closed, in which the same parts as in FIG. 1 are denoted by the same reference numerals.

In this example, the support plate 6, which was bent into a substantially L-shape in the example of FIG. 1, is made straight without being bent, and is attached to the side surface of the door instead of the bottom. With the configuration as in this example, when the support plate 6 is attached to the door 1, it will not be obstructed by the approximately U-shaped gutter 5, so while maintaining the effect of preventing the machining fluid from falling from the door 1, the installation workability is improved. Much improved.

As described above, the present invention prevents the machining fluid from falling when the machining tank door is opened after the completion of electric discharge machining, and is highly effective in improving the workability of electric discharge machining.

[Brief explanation of the drawing]

FIG. 1 is a cross-sectional view showing the first embodiment of the present invention with the processing tank door closed, FIG. 2 is a cross-sectional view showing the first embodiment of the present invention with the door open, and FIG. FIG. 7 is a sectional view showing a second embodiment of the present invention with the door closed. In each figure, the same members are given the same symbols, 1 is the door, 2 is the processing tank, 3 is the packing, 4 is the block,
5 is a substantially U-shaped gutter, 6 is a support plate, 7 is a saucer, and 8 is a hinge.

Claims (1)

[Claims] 1. A machining tank body of an electrical discharge machining device that holds a workpiece in place and performs electrical discharge machining by filling it with machining fluid, a door for loading and unloading the workpiece provided via a hinge on the machining tank body, and a A substantially U-shaped gutter is provided at the lowest part of the outside of the processing tank to receive the processing fluid adhering to the door, and a substantially U-shaped gutter is installed below the substantially U-shaped gutter in the main body of the processing tank, and flows out from the substantially U-shaped gutter. An electrical discharge machining apparatus comprising a saucer for receiving machining fluid, and wherein the substantially U-shaped gutter is inclined downward in the direction of the hinge of the door.