JPH0555252B2 - - Google Patents

Description

[Detailed Description of the Invention] [Industrial Application Field] The present invention provides a method for installing an arbitrary plurality of electric discharge machining units in which a workpiece and an electrode are respectively attached to a machining tank that accommodates a large machining fluid so as to be able to feed the workpiece for machining. Loading,
The present invention relates to an electrical discharge machining device that performs electrical discharge machining while being carried out.

[Conventional technology]

Conventional electric discharge machining equipment is placed on the bed,
The workpiece is placed on a table that moves in the X-axis and Y-axis directions perpendicular to each other, and side walls are erected around the table to form a machining tank, into which machining fluid is poured. .

On the other hand, the electrode is supported by a ram that slides on the sliding surface of a column fixed and erected on the side of the bed, and is supported by a spindle that is rotatably and slidably supported by a head that moves vertically opposite the table. attached to the tip. In this way, electrical discharge machining is performed by supplying machining liquid to the machining bath while moving the workpiece and the electrode relative to each other, and applying machining voltage pulses between the two.

[Problem that the invention seeks to solve]

In conventional electrical discharge machining equipment, when setting a workpiece on a table, the side wall of the machining tank must be opened or the entire side wall of the machining tank must be lowered below the table.
In electric discharge machining, it is important to control the type of machining fluid, ion concentration, degree of contamination of machining debris, etc., and this has to be managed for each machine.

[Means to solve the problem]

Therefore, the present invention provides a workpiece stand and an electrode stand in which a well-controlled machining fluid for electrical discharge machining is put into a relatively large single machining tank, and a workpiece and an electrode are respectively attached to one side of the machining tank. An electric discharge machining unit in which a workpiece and an electrode face each other and are supported so that they can be machined and fed in opposite directions is carried in by a transport device, and a machining electrode pulse is applied to perform electric discharge machining. The electric discharge machining unit that has finished electric discharge machining is carried out of the machining tank again using a conveyance device, and conveyed to a predetermined position by an automatic guided vehicle or belt conveyor waiting there.

[Effect]

Machining fluid is controlled by an attached machining fluid supply device to fully satisfy the conditions required for electrical discharge machining, such as the type of machining fluid, ion concentration, concentration of machining debris, and fluid temperature. Supply to tank. The electrical discharge machining unit inserted into the machining tank is fully equipped with measuring instruments and jigs, and the electrode and workpiece are attached to it, and is transported by an automatic guided vehicle, belt conveyor, etc. There are various sizes depending on the size of the electrode and workpiece. It is carried into the machining tank using a transport device installed at the machining tank, and the discharge machining unit that has been machined is then taken out. Therefore, in the case of a small electrical discharge machining unit, many units are carried in and discharged. If you have a large electrical discharge machining unit, you can perform electrical discharge machining of various sizes, such as electrical discharge machining using a machining tank.

〔Example〕

Reference numeral 1 denotes a machining tank for storing a machining fluid 2, which has a size and shape capable of accommodating and installing a plurality of standardized electrical discharge machining units (to be described later), each unit of which performs a desired electrical discharge machining. This machining tank 1 is equipped with a circulating supply device for purifying and controlling the machining fluid 2. The machining fluid 2 in the machining tank 1 is sucked by a pump 4 through a filter 3, and is then sucked by a cooling device. Discharge toward 5. The machining fluid cooled by the fan 6 is controlled by a known machining fluid control device 7 that controls one or more of ion concentration, machining waste concentration, temperature, etc.
It is returned to processing tank 1 through . The electric discharge machining unit 8 is configured to support a workpiece stand and an electrode stand, each having a workpiece and an electrode attached to one side thereof, so that the workpiece and the electrode face each other and can be machined and fed in opposite directions. Specifically, a guide bar 1 is installed between a worktable 10 on which a workpiece 9 is installed and a top plate 11.
An electrode stand 14 on which an electrode 13 is fixedly fixed and an electrode 13 pivoted on the guide bar 12 is connected to a screw spindle 16 which is moved in a straight line (vertical) direction by a step motor 15 fixed to the top plate 11. Control move. 17 is a hook provided on the top plate 11. Furthermore, the transport device 18 attached to the processing tank 1 part has a horizontal beam 20 supported by two pillars 19, and a saddle 21 pivoted to this beam 20 is fixed to the beam. The pinion 23 that engages with the rack 22 is rotated by a servo motor 24 fixed to the saddle 21, thereby moving along the beam 20.

An arm 25 having an I-shaped cross section and provided at right angles to the beam 20 is fixed to this saddle 21.
A carrier 26 moves on the vehicle 5 while being supported by wheels 27. Its movement is carried out by the rack 2 fixed to the arm 25.
The arm 25 is moved by rotating a pinion 29 that meshes with the arm 8 by a servo motor 30 fixed to the carrier 26. A pair of cylinders 31 are fixed to the carrier 26, and a piston rod 3
2 in the vertical direction. This piston rod 3
At the tip of the hook 2 is a claw 33 that opens and closes using an electromagnet (not shown), and is used to grip and release the hook 17. Using a measuring instrument or jig, the electrode 13 and the workpiece 9 are placed in the machining tank 1 filled with the machining fluid 2 that is most appropriately controlled by the machining fluid control device 7 of the attached machining fluid supply device. The installed electric discharge machining unit 8 is transported by a transport vehicle 34 shown by a straight line in FIG. Once the carrier 26 is moved by the servo motor 30 to a position above the electrical discharge machining unit 8, pressure fluid is sent to the cylinder 31 to lower the piston rod 32, and the claw 33 is opened and closed to grip the hook 17. Then, a switching valve (not shown) is switched, the pressure fluid in the cylinder 31 is switched, and the piston rod 32 is raised together with the electrical discharge machining unit 8. Next, the saddle 21 is moved by the servo motor 24, and the carrier 26 is moved by the servo motor 30, and the electric discharge machining unit 8 is carried to an appropriate location in the machining tank 1, and the piston rod 3 is moved.
2, and open the claw 33 to install it. The electric discharge machining unit 8 installed in this way is connected to a control device and a machining power source installed in an out-of-the-way position such as on the back side of the machining tank 1 (not shown) to perform electric discharge machining, and when the electric discharge machining is completed, The units 8 are carried out from the processing tank 1 in the reverse order of the carrying-in process.

〔Effect of the invention〕

According to the present invention, a plurality of electric discharge machining units each having an electrode and a workpiece attached thereto and moving toward each other are carried into a single large machining tank containing a well-controlled machining fluid, and are installed to perform electric discharge machining. Since the electric discharge machining unit that has finished electric discharge machining is carried out of the machining bath, in the case of a small electric discharge machining unit, many electric discharge machining units can be operated in one machining bath, but the machining A large workpiece can be machined with an electric discharge machining unit that can be placed in a bath, and an inexpensive electric discharge machining apparatus can be provided.

[Brief explanation of the drawing]

FIG. 1 is a front view of the present invention, FIG. 2 is a plan view, and FIG. 3 is a cross-sectional view taken along the line A--A in FIG. 1. DESCRIPTION OF SYMBOLS 1... Machining tank, 2... Machining fluid, 8... Electric discharge machining device, 9... Workpiece, 13... Electrode, 18... Transfer device, 20... Beam, 25... Arm.

Claims (1)

[Claims] 1 A workpiece stand and an electrode stand each having a workpiece and an electrode attached to one side thereof are supported so that the workpiece and the electrode face each other and can be processed and fed in opposite directions, and a lifting jig is further attached. It is equipped with a plurality of electric discharge machining units and a machining tank that stores machining fluid in a size that can accommodate and install a plurality of the electric discharge machining units, and furthermore, the machining tank has a structure in which the electric discharge machining units can be carried in and out by lifting and conveying. An electric discharge machining apparatus characterized in that it is equipped with a conveying device for carrying out and setting up the machining fluid, and a machining fluid supply device that controls and circulates the state of the machining fluid.