Arc discharge processing purging area regulating system

A technology of arc discharge and control system, which is applied in the direction of electric processing equipment, metal processing equipment, circuits, etc., can solve the problems of poor cooling effect in the processing area of ​​erosion products, poor application, low flow rate of working fluid, etc., and achieve improvement The surface quality of the workpiece, the cooling effect is good, and the effect of improving the processing efficiency

Active Publication Date: 2018-10-16
SHANGHAI JIAO TONG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the working fluid flowing out of the nozzle is an external flushing fluid. Compared with the internal flushing fluid, the working fluid entering the EDM gap has a low flow rate and a small flow rate, and the erosion product discharge and the cooling effect of the processing area are poor. At the same time, the flushing fluid The system does not solve a series of problems caused by the pressure relief effect of the flushing fluid in the non-discharge machining area after the electrode discharge loss, which makes the system not suitable for the machining situation after the electrode discharge loss, especially for processing with three-dimensional features. Multi-axis simultaneous high-speed arc discharge machining of workpieces with complex shapes

Method used

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  • Arc discharge processing purging area regulating system
  • Arc discharge processing purging area regulating system
  • Arc discharge processing purging area regulating system

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Experimental program
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Effect test

Embodiment 1

[0038] On the electromagnet installation base, 8 miniature disc-shaped electromagnets are evenly arranged. The diameter of the electromagnet is 20mm, the height is 15mm, and the suction force is 25N. It is installed and fixed through the M4 threaded hole. The material of the electrode adapter in the controllable electrode device in the flushing area is brass, the material of the bearing is ceramic, the material of the control ring is martensitic stainless steel, the electrode is a porous internal flushing graphite electrode with a diameter of 20mm, and the material of the workpiece is nickel-based superalloy , and complete the installation and connection of all components of the system as required. When performing high-speed arc discharge milling, connect the electrode and the workpiece to the two poles of the discharge power supply. The parameters of the power supply used are: open circuit voltage 90V, peak current 600A, pulse width 8ms and pulse interval 2ms, electrode rotati...

Embodiment 2

[0040] Change the number of electromagnets to 4, keep other conditions constant in embodiment 1, carry out as follows Figure 5 The arc discharge machining of the square trajectory shown, the side length of the square is 100mm, and the groove depth is 3mm. During the machining process, the machining feed direction is Y-axis positive direction, X-axis positive direction, Y-axis negative direction, and X-axis negative direction. By reading the machining track information, the control unit automatically generates 4 solenoid start-stop states. instructions, which can in turn be formed as Figure 5 The 4 different irrigation area positions are shown.

[0041] Experiments have shown that the control unit of the arc discharge machining flushing area control system of the present invention is connected with the machine tool numerical control system through the interface of the machine tool numerical control system and the control unit, reads the machining track, and automatically gen...

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Abstract

The invention discloses an arc discharge processing purging area regulating system. The arc discharge processing purging area regulating system includes a purging area controllable electrode device, amachine tool holder purging connecting opening, a spindle base, a control unit, a connecting opening of a machine tool numerical control system and the control unit and a working fluid supply unit; the control unit reads the machining track by communicating with the machine tool numerical control system, the electromagnet control instruction is automatically generated according to the machining track, and the control signal of the starting and stopping state is provided for each electromagnet; and the position of the purging area keeps in line with the direction of machining feeding. According to the arc discharge processing purging area regulating system, by controlling the purging area, the decompression and outflow of a large number of working fluids in the non-discharge processing area after the electrode loss in arc processing can be prevented, and the fact that the strong internal punching fluid is always maintained in the discharge processing gap is ensured; and the frequency of processing short circuit and stable arc phenomena due to the low purging fluid flow rate and low pressure is reduced, and the machining efficiency and the workpiece surface quality are improved.

Description

technical field [0001] The invention relates to arc discharge machining, in particular to a liquid flushing area control system for arc discharge machining. Background technique [0002] High-speed arc discharge machining uses arc plasma formed by the discharge between the workpiece and the tool electrode to achieve efficient removal of various difficult-to-cut conductive materials. Hydrodynamic arc interruption is the key mechanism for realizing this technology. The inner hole is set on the tool electrode, and the high-pressure fluid medium passes through it. In addition to realizing the hydrodynamic arc breaking, it can also effectively take away the discharge erosion products and cool the workpiece processing surface. High-speed arc discharge milling combines the efficiency of arc discharge and the flexibility of milling, and is a current research hotspot. During the high-speed arc discharge milling process, the electrode will gradually experience axial and radial discha...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B23H1/02B23H1/10
Inventor 顾琳何国健朱颖谋
Owner SHANGHAI JIAO TONG UNIV
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