Abstract:
The steel bonded carbide, a composite material, is very difficult to be machined to a fine finishing mirror surface. An electrolytic in-process dressing (ELID) grinding with metallic bond super-hard abrasive wheel is developed for grinding steel bonded carbide GT35. Factors effecting ELID grinding performance are analyzed by atomic force microscope (AFM). Based on the analysis of AFM topography of the fine ground mirror surface of the steel bonded carbide, a schematic diagram of the mechanism of micro-removal of the ground surface is described. The AFM topography also shows that the hard brittle carbide particles, on the surface of steel bonded carbide, are machined out by ductile cutting. The reason of producing grinding cracks in the grinding area is analyzed too. Experimental results indicate that a good mirror surface with Ra<0.02 μm can be obtained by the developed ELID grinding system.
Key words:
Grinding In-process dressing AFM
* Selected from Proceedings
of International Symposium of Advanced Manufacturing
Technology (ISAMT'2001); revised manuscript August 18, 2002
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