JPS6125728A - Electric discharge processing equipment - Google Patents

Abstract

PURPOSE:To very simply and easily mount and demount an electrode and a workpiece into and out of an electric discharge processing unit and improve the coefficient of operation, by providing a construction so as to make it possible to take the processing unit out of an electric discharge processing tank. CONSTITUTION:At preparation work before the start of electric discharge processing, a processing unit 9 is pulled out of a processig tank 2. A workpiece 11 and an electrode 10 are munted on setting rests 12, 13 and adjuted in position thereon. Since the moving portion of a feed screw 14 is protected by a bellows from drops, corrosion and chip jamming are prevented so that stable smooth serve feed is always effected by a servomotor 16 to control the feed screw to regulate the feed of the rest 13 to perform the electric discharge processing rapidly and efficiently. According to this constitution, the mounting and demounting of the electrode and the workpiece into and out of the unit 9 are simplified and facilitated, and the coefficient of operation is enhanced.

Description

[Detailed description of the invention] (Technical field) The present invention relates to electrical discharge machining equipment.

[Prior art]

Conventional electric discharge machines are installed in a machining tank that stores machining fluid.The workpiece is set on a set table, and the electrode is placed opposite the workpiece by a feeding device while maintaining a minute gap between the electrode and the workpiece. It is configured to perform machining by repeatedly applying submerged pulse discharge between bodies. For this reason, the work of attaching and positioning the electrode and the workpiece is not easy, and a long time is required for setup, resulting in a reduction in the operating rate of the machine.

[Configuration of the present invention]

The present invention improves this point, and includes a machining tank that stores machining fluid, a machining unit into which the machining fluid flows when carried into the machining tank, and a machining unit that is carried into the machining tank. A conveyance device for carrying out is provided,
The processing unit includes a set table on which a workpiece is set, a set table on which an electrode is mounted opposite to the workpiece,
The present invention is characterized in that it is provided with a machining feed device that provides relative machining feed between the two set tables, and a cover that protects the movable portion of the machining feed device from dripping against machining liquid.

〔Example〕

The present invention will be explained below with reference to an embodiment of the drawings.

In Figure 1, 1 is the bed, 2 is the processing tank, 3 is the processing fluid stored in the tank, 4 is the ball, 5 is the arm, and 6
is a hoist, 7 is an operation box, and 8 is a hook.

9 is a processing unit that includes an electrode 10 and a workpiece 11 as a set; 12 is a set stand for setting the workpiece; 13 is a human stand for attaching the electrode; the set stand 12 is fixed to the lower end of the feed screw 14; , the set table 13 is screwed onto the feed screw 14. 15 is a support plate fixed to the upper end of the feed screw 14, servo motors 16 and 17 for driving the feed screw 14 are bellows that prevent the feed screw 14 from dripping from machining liquid, and 18 is an eye bolt for supporting the unit.

In the above figure, the drive control power supply that controls the servo motor 16, the processing pulse power supply that supplies electricity between the electrode 10 and the workpiece 11, the pump device that supplies and circulates the processing fluid 3 in the tank 2, etc. It is omitted.

In the above, the machining unit 9 is pulled out from the machining tank 2 and subjected to preparatory work during the setup work before starting machining. The workpiece 11 and the electrode 10 are mounted on set tables 12 and 13, respectively.
It is attached to and the position is adjusted.

The processing unit with the electrode and workpiece set like this
9 is then slinged to the eye bolt 18, suspended from the hook 8 of the crane, lifted, the arm 5 is swung around the ball 4 of the crane, and the hoist is hoisted along the arm 5.
6 is moved and positioned above the processing tank 2, the hook 8 is lowered and the suspended processing unit 9 is placed on the tank 2.
Immerse it in internal processing liquid 3. As shown in the figure, the machining unit 9 has a structure in which setting tables 12 and 13 for electrodes and workpieces are engaged by a feed screw 14, and machining fluid can freely flow in and out from around the machining tank 2. By inserting it, the stored machining fluid 3 can easily flow between the electrode 10 and the workpiece 1.
Infiltrate between 1.

However, after the preparation work, a control power supply circuit is connected to the servo motor 16 by inserting a plug, etc., and a processing pulse power supply is connected between the electrode 10 and the workpiece 11. When the switch is turned on, the servo motor 16 is operated, the electrode 10 is lowered, a minute gap is maintained between the electrode 10 and the workpiece 11, a pulse discharge is generated, and the discharge is repeated to proceed with machining. During electrical discharge machining, the machining fluid 3 in the tank flows through the machining unit and through the machining gap to perform a discharge medium, cooling action, and removal of machining debris, thereby performing stable electrical discharge machining. The control of the feed screw 14 by the servo motor 16 and the feed control of the set table 13 by the servo motor 16 are performed without corrosion or clogging with machining waste because the movable part of the feed screw 14 is protected against dripping by the bellows 17. The servo feed is always stable and smooth, and high-speed, efficient electrical discharge machining is performed.

When the predetermined electrical discharge machining is completed in this manner, the machining unit 9 is again lifted up from the machining tank by the crane, moved to another location, and the workpiece is removed. The electrode and workpiece are set in the machining unit again and transported to the machining tank for machining.The setting of the electrode and workpiece, reset work, and electrical discharge machining work are repeated at different locations using the transport device in order. Efficient processing can be performed.

If there are a plurality of machining units, at least two, the work of setting and resetting one machining unit can be completed while another unit is performing electric discharge machining, thereby improving the operating rate of the electric discharge machine.

FIG. 2 shows another embodiment of the processing unit, in which a fixed support 19 is provided on the set table 12 of the workpiece 11, and a support plate 15 is provided at the upper end.
to be fixed. Reference numeral 20 denotes a shaft that slides on the support plate 15, and is slid up and down by a rack and binion mechanism 21.

A set base 13 for electrode attachment is provided at the lower end of the sliding shaft 20,
The electrode 10 is set on this. 22 is a drip-proof tube that surrounds the top of the set table 13, and 23 is a drip-proof cylinder that surrounds the set table 13;
This is a motor drive device that sends it to a flat surface.

The electrode and the workpiece are respectively set on the set tables 12 and 13, and after the preparation work, the machining unit is inserted into the machining tank 2 by the crane shown in FIG. NC11ilII is installed on the upper and lower Z transport remoters 16 and the X-axis and Y-axis drive motors 23 on the right angle plane.
By plugging in the Il feeder and performing machining feed, precision machining can be performed while providing servo feed in the Z-axis direction and machining feed in the X-Y axes directions simultaneously or alternately, allowing any desired purpose machining to be performed. It can be processed stably. If the feed control of the X-Y axes is also servo-controlled according to the state of the machining gap, stable machining can be achieved without arcing or short circuits. Further, it is also possible to process the overall shape by using a simple electrode such as a rod as the processing electrode by three-dimensional feed control.

In addition, the electrode 10 is processed by being immersed in the liquid in the processing tank 2, but the entire movable part on the set table 13 is resistant to 1vR22.
, it is possible to continue stable machining without being disturbed by the intrusion of machining fluid.

In the above-mentioned embodiment, the electrode is given a machining feed, but the same effect can be obtained by applying a feed to the opposite workpiece side.

Furthermore, the transport device is not limited to a crane. For example, if the side wall of the machining tank 2 can be opened and closed, the machining unit can be transported and set from the side. In this case, machining fluid can be supplied and stored in the machining tank when the machining tank is set, and machining can be started. The device can be any device that moves on rails or rollers.

〔effect〕

As described above, since the present invention allows the machining unit to be taken out of the machining tank where electrical discharge machining is performed, attachment and removal of electrodes and workpieces within the machining unit can be performed extremely easily. By preparing two or more machining units, they can be used alternately, which eliminates setup preparation work, improves the operation rate of the electric discharge machine, and enables efficient electric discharge machining. In addition, since the movable part of the machining feed device in the machining unit is equipped with a drip-proof device against machining fluid, the circle W4 is always stable without being disturbed by machining fluid, gas generated, machining debris, etc. Servo feed is performed, which has the effect of enabling high-speed and efficient electrical discharge machining.

[Brief explanation of drawings]

FIG. 1 is a block diagram of one embodiment of the present invention, and FIG. 2 is a block diagram of a part of another embodiment thereof. 2......Processing tanker...Hoist 9...Processing unit 10...Electrode 11... ...Workpiece 12.13...Set stand 14...
...Feed screw 1G ...Motor 17 ...Bellows 22 ...Drip-proof tube patent applicant

Claims (1)

[Claims] In electrical discharge machining equipment that supplies machining fluid to a machining gap where an electrode and a workpiece face each other and performs machining by repeating pulsed discharge, there is a machining tank that stores machining fluid, and an internal A machining unit into which machining fluid flows into the machining tank, and a conveying device that carries the machining unit into and out of the machining tank are provided, and the machining unit includes a set table on which a workpiece is set, and a set table facing the workpiece. The method is characterized by being provided with a set table on which an electrode is attached, a machining feed device that provides relative machining feed between the two set tables, and a cover that makes the movable part of the machining feed device drip-proof against machining fluid. electrical discharge machining equipment.