Air blast electric spark processing method in liquid

Abstract

Provided is an electric spark processing method of spraying gas to liquid of a special processing technology. Hollow-tube-shaped tool electrode is employed, when the electric spark is used to process, high-pressure gas is sprayed from the hollow-tube-shaped tool electrode, the tool electrode and work-pieces are immersed in treatment liquid. The invention has the advantage that liquid treatment medium is blended based on the processing method of gas electric spark, the gas is the treatment medium, the water-based treatment liquid does not directly participate power discharging, but produces a beneficial assistant effect to the processing. The invention also has the advantages of lower short circuiting rate of the processing, good stability, high removal rate of materials, good quality of treatment surface, and being in accordance with the trend of green manufacturing.

Description

technical field [0001] The invention relates to a processing method in the technical field of special processing, in particular to a gas-jet electric discharge processing method in liquid. Background technique [0002] EDM uses pulsed spark discharge between the tool electrode and the workpiece to etch the material on the surface of the workpiece, and finally reversely copies the shape of the electrode to the workpiece. This processing method has the advantages of not being limited by the mechanical properties of the workpiece material such as strength and hardness, and has no macroscopic cutting force. It is especially suitable for processing difficult-to-machine materials and complex-shaped workpieces. It is useful in aviation, aerospace, automobiles, electronics, molds and other industries. Wide range of applications. EDM is usually carried out in insulating working fluids such as hydrocarbons. The main functions of the EDM working fluid in EDM are: to maintain a certai...

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Problems solved by technology

The disadvantages of EDM in air are: the processing efficiency is low, and the processing efficiency when using air as the dielectric is only 1 / 6 of the working fluid; the short circuit rate is much higher than that of the discharge in the liquid, and high-precision tool electrode feeding is required The servo system and power supply system increase the cost of the equipment and reduce the market competitiveness; the cooling effect of the gas on the electrode and the workpiece is far less than that of the liquid, so it is difficult to use a higher peak current to improve the processing efficiency; the melting generated during the discharge process The metal is not easy to cool and solidify in time during the splashing process, and some parts will stick to the surface of the workpiece and affect the processing quality

How to maintain the advantages of EDM in gas and absorb the advantages of EDM in liquid at the same time, there is no good method at present

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