JPH0457622A - Electric discharge machine - Google Patents

Abstract

PURPOSE:To improve workability for a workpiece, and enable an electric discharge machine to be fully automated by applying the double bath construction of fixed and movable baths to the machine, and causing the vertical motion of the movable bath relative with the fixed bath via a seal member. CONSTITUTION:The machining bath of this electric discharge machine is constituted with a fixed bath 1 and a movable bath 2. The fixed bath 1 is secured to a table 4 travelling in orthogonal X-and Y-axis directions via the operation of an XY drive section 5. On the other hand, the movable bath 2 is so installed as to be capable of moving vertically relative with the fixed bath 1 via seal member 3. Also, a work bench 6 is installed on the table 4 via a rack 18, and a workpiece 7 is placed on the work bench 6. Furthermore, the upper end level of the movable bath 2 at the lowest position is set approximately even with the upper surface of the work bench 6. According to the aforesaid construction, workability is substantially improved by lowering the movable bath 2 after discharging a machining fluid 8 through a drain 15, because the vicinity of the workpiece 7 and the upper surface of the work bench 6 becomes free from either of the baths 1 and 2.

Description

Detailed Description of the Invention [Field of Industrial Application] The present invention provides an electric discharge machine, particularly an electric discharge machine having a machining tank, in which the machining tank has a double structure of a fixed tank and a movable tank, and A workbench is installed on a processing table located at the bottom of the tank via a pedestal and on which the workpiece is placed, and the top surface level of the workbench is at least equal to the upper edge level at the lower limit position of the movable tank. This relates to electric discharge machines configured to be approximately on the same level.

[Conventional technology]

FIG. 3 shows an example of a conventional electric discharge machine, and FIG. 4 shows an example of a machining tank in a conventional electric discharge machine.

The reference numeral 31 in the figure is a processing tank, and the reference numeral 32 is a table.

33 is an XY drive unit that moves the table 32 in orthogonal X-axis and Y-axis directions; 34 is a workpiece; 35 is a machining fluid; 36 is an electrode; 37 is a ram; 38 is a machining head; 39 is a column; 40 is a 41 is the drain, 42 is the front door.

43 represents a boundary, and 44 represents a gutter.

The conventional example shown in FIG. 3 is a well-known so-called ram type electric discharge machine. That is, by generating an electric discharge between the workpiece 34 placed on the table 32 and immersed in the machining fluid 35 supplied into the machining tank 31 and the electrode 36, the workpiece 34 is This is to perform electrical discharge machining.

In the ram-type electrical discharge machine, electrical discharge machining is performed with the workpiece 34 immersed in the machining fluid 35, so the machining tank 31 is configured in a box shape with an opening only at the top. . However, for the convenience of operations such as attaching and detaching the workpiece 34 and inspecting the processing state, a door (not shown) is provided in the front of the processing tank 31.
After the machining liquid 35 in the machining tank 31 is discharged from the drain 41, the door is opened to perform the work.

However, even if the door provided at the front of the processing tank 31 is opened, the three sides other than the front remain closed.
There was a problem with the workability of the above work.

The conventional example of the processing tank shown in FIG. 4 was designed to solve the above-mentioned problems. That is,
By providing a front door 42 on the front side of the processing tank 31 and providing a boundary 43 on the side surface, two surfaces, the front and side surfaces, of the processing tank 31 can be opened, and the above-mentioned workability is improved. This is what I did.

[Problem to be solved by the invention]

In recent years, automation of electrical discharge machines is progressing. In order to advance this automation, full automation including the process of attaching and detaching the workpiece is desired.

However, the machining tank in the conventional electrical discharge machine described above with reference to FIGS. The necessity of opening and closing the door was an obstacle to the above-mentioned full automation.

[Means for Solving the Problems] The present invention aims to solve the above-mentioned problems, and therefore, the electric discharge machine of the present invention includes an electrode for electric discharge machining, a table installed in a machining tank, and The workpiece is immersed in the machining liquid stored in the machining tank and placed on the table, and an electric discharge is generated between the electric discharge machining tS and the workpiece. In an electrical discharge machine configured to perform electrical discharge machining on a machine, the machining tank is composed of a fixed tank and a movable tank configured to be slidable vertically with respect to the fixed tank via a seal member. , a worktable is installed via a pedestal on a processing table located at the bottom of the fixed tank and on which the workpiece is placed, and the upper end level at the lower limit position of the movable tank and the upper surface level of the workbench are provided. It is characterized in that it is configured such that the levels are at least approximately the same level.

This will be explained below with reference to the drawings.

〔Example〕

FIG. 1 is an explanatory diagram for explaining one embodiment of the electrical discharge machine of the present invention, and FIG. 2 is an explanatory diagram for explaining another embodiment of the machining tank in the electrical discharge machine according to the present invention. It shows. In the figure, numeral 1 is a fixed tank, 2 is a movable tank, and 3 is a movable tank.
4 is a sealing member, 4 is a table, 5 is an xY drive unit that moves the table 4 in orthogonal X-axis and Y-axis directions, and 6 is a workbench.

7 is a workpiece, 8 is a machining fluid, 9 is an electrode, and 10 is a ram.

11 is a processing head, 12 is a column, 13 is a bed, 1
4 is a processing tank driving device, 15 is a drain, 16 is a pulp for rapid drainage, 17 is a gutter, and 18 is a pedestal.

An embodiment of the present invention shown in FIG. 1 has basically the same structure as a conventional electric discharge machine except for the machining tank. That is, the machining tank of the electrical discharge machine according to the present invention is composed of a fixed tank 1 and a movable tank 2. The fixed tank 1 is fixed to a table 4 that moves in orthogonal X-axis and Y-axis directions by an
It is designed to be able to move up and down. Further, a workbench 6 is installed on the table 4 via a pedestal 1B, and a workpiece 7 is placed on the workbench 6. The upper edge level of the movable tank 2 at the lower limit position is approximately the same level as the upper surface level of the workbench 6. The processing tank driving device 14 drives the movable tank 2 in the vertical direction using, for example, a hydraulic cylinder.

The other configurations are the same as those of the conventional electric discharge machine as described above.

In the embodiment shown in FIG. 1, when the workpiece 7 is set on or removed from the workbench 6, and when inspecting the machining state, the upper edge of the movable tank 2 is at least at the same level as the upper surface of the workbench 6. The movable tank 2 is pulled down until it reaches the level. At this time, it goes without saying that the machining fluid 8 must be drained from the drain 15 to prevent it from overflowing. In this state, since there is no processing tank around the upper surface of the workpiece 7 and the workbench 6, work efficiency is greatly improved. Also,
The attachment and removal operations of the workpiece 7 can be unmanned, which can greatly contribute to the automation of electric discharge machines. During electrical discharge machining, as shown in FIG. 1, the movable tank 2 is pulled up and machining fluid 8 is injected into the fixed tank 1 and the movable tank 2 by a machining fluid supply means (not shown), and the machining fluid is injected into the fixed tank 1 and the movable tank 2. Electric discharge machining is performed while the workpiece 7 is immersed in the liquid 8.

FIG. 2 shows another embodiment of the machining tank in the electrical discharge machine according to the present invention. The embodiment shown in FIG. 2 is basically the same as the processing tank in the embodiment shown in FIG.
The fixed tank 1 and the movable tank 2 are separated,
For example, the machining liquid 8 in the movable tank 2 is drained into the fixed tank 1 by means of a sudden liquid draining pulp 16 such as a solenoid valve. Therefore, the machining fluid 8 in the movable tank 2 is discharged when the movable tank 2 is lowered to set or remove the workpiece 7 on the workbench 6, or when inspecting the machining state.
By using the rapid liquid drain valve 16, it is possible to speed up the draining time of the machining liquid 8 and shorten the operating time for vertical movement of the movable tank 2.

Although the present invention has been described above as being applicable to a ram-type electrical discharge machine, the present invention is not limited to a ram-type electrical discharge machine, and can also be applied to a wire-cut electrical discharge machine. Although not shown, the movable tank may be arranged in multiple stages depending on the height of the workbench.

〔Effect of the invention〕

As explained above, according to the present invention, the processing tank has a double structure of a fixed tank and a movable tank, and the movable tank is configured to be movable in the vertical direction with respect to the fixed tank via a seal member. Since it is possible to prevent the processing tank from existing around the workbench on which the workpiece is placed, attachment of the workpiece is a labor-intensive task.

In addition to improving workability in removal work, machining status inspection work, etc., it also enables unmanned installation and removal of workpieces, which can greatly contribute to the automation of electrical discharge machines.

[Brief explanation of drawings]

FIG. 1 is an explanatory diagram for explaining one embodiment of the electrical discharge machine of the present invention, FIG. 2 is an explanatory diagram for explaining another embodiment of the machining tank in the electrical discharge machine according to the present invention, FIG. 3 shows an example of a conventional electric discharge machine, and FIG. 4 shows an example of a machining tank in a conventional electric discharge machine. In the figure, 1 is a fixed tank, 2 is a movable tank, 3 is a seal member, 4 is a table, 5 is an XY drive unit, and 6 is a workbench. 7 is a workpiece, 8 is a machining fluid, 9 is an electrode, and 10 is a ram. 11 is the processing head, 12 is the column, 13 is the bed, 1
4 is a processing tank drive device, 15 is a drain, 16 is a rapid drainage valve, 17 is a gutter, and 18 is a pedestal.

Claims (1)

[Scope of Claims] A workpiece comprising an electric discharge machining electrode and a table installed in a machining tank, and a workpiece placed on the table while being immersed in machining fluid stored in the machining tank, and the workpiece described above. In an electrical discharge machine configured to perform electrical discharge machining on the workpiece by generating electrical discharge between the electrical discharge machining electrode, the machining tank includes a fixed tank and a seal for the fixed tank. A workbench consisting of a movable tank configured to be slidable in the vertical direction via a member, and installed via a pedestal on a processing table located at the bottom of the fixed tank, on which the workpiece is placed. and is configured such that the top surface level of the workbench is at least approximately the same level as the upper edge level at the lower limit position of the movable tank.