Inflatable pressurized electrochemical discharge machining device and method

Abstract

The invention is suitable for fine precision machining of insulated hard and brittle materials, belongs to the non-traditional machining field in manufacturing technologies, and particularly provides a pneumatic compression electrochemical discharge machining device and method. An airtight working cavity is filled with helium through a gas supply system, and thus pressure inside the working cavity is increased and controlled. An air pressure feedback and gas supply system is established to regulate the pressure inside the working cavity. A force feedback and tool electrode movement system is established to control effective feeding of tool electrodes, and the machining clearance is guaranteed. Pressure increase can accelerate formation of a gas film layer and improve the stability of the gas film layer, and electro-discharge machining precision and surface machining quality are improved. Pressure increase can also make operating fluid permeate into the machining area more easily, so that the machining depth is increased. Pressure control can indirectly control thickness of the gas film layer, and therefore the electro-discharge machining radius and machining precision can be controlled.

Description

technical field [0001] The invention relates to the field of special processing in manufacturing technology, in particular to an air-inflated pressurized electrochemical discharge processing device and method, which can be used for processing insulating hard and brittle materials. Background technique [0002] Insulating hard and brittle materials represented by glass have excellent properties such as high hardness, chemical corrosion resistance, transparency and good biocompatibility. At present, the processing methods for these materials include laser processing, chemical etching, ultrasonic processing, electrochemical discharge processing, etc. Laser processing is difficult to process transparent materials such as glass. The chemical etching process is complicated and the corrosion rate is low. During the ultrasonic machining process, due to the action of mechanical force, it is easy to cause cracks in the processed material. The electrochemical discharge machining met...

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Problems solved by technology

The experimental results show that physical gas filling can replace part of the gas that needs to be generated by electrochemical reactions, accelerate the formation of gas film layers, reduce electrochemical reactions during processing, and improve the spark discharge rate, but the size of the tubular electrode is relatively large, and the gas film Layer thickness is not stable due to gas flow

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