What kind of processing is EDM and what materials can be processed

EDM belongs to non-contact processing
There is no direct contact between the tool electrode and the workpiece, but there is a spark discharge gap. This gap is generally between 0.05 and 0.3 mm, and sometimes it may reach 0.5 mm or even larger. The gap is filled with working fluid, and high voltage is applied during machining. Pulse discharge, discharge corrosion of the workpiece.

Can “overcome strength with softness”
Since EDM directly uses electrical energy and heat to remove metal materials, it has little to do with the strength and hardness of the workpiece material. Therefore, soft tool electrodes can be used to process hard workpieces to achieve “softness against rigidity”.

Can process any difficult-to-process metal materials and conductive materials
Since the removal of materials during processing is achieved by the electrical and thermal effects of discharge,edm machining service  the machinability of the materials mainly depends on the electrical conductivity and thermal characteristics of the material, such as melting point, boiling point, specific heat capacity, thermal conductivity, resistivity, etc., but almost It has nothing to do with its mechanical properties (hardness, strength, etc.). This can break through the limitations of traditional cutting tools, and can realize the processing of hard and tough workpieces with soft tools and even superhard materials such as polycrystalline diamond and cubic boron nitride.

Can process complex surfaces
Since the shape of the tool electrode can be simply copied to the workpiece, it is particularly suitable for the processing of workpieces with complex surface shapes, such as complex cavity mold processing. In particular, the adoption of numerical control technology has made it a reality to process complex-shaped parts with simple electrodes.

Can process parts with special requirements
It can process parts with special requirements such as thin-walled, elastic, low-rigidity, micro-small holes, special-shaped small holes, deep small holes, etc., and can also process small text on the mold. Since the tool electrode and the workpiece are not in direct contact during processing, and there is no cutting force for machining, it is suitable for processing low-rigidity workpieces and micro-machining.

 

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