钛合金TC4电火花诱导可控烧蚀高效磨削技术研究

Abstract

Abstract: A new process of efficient grinding technology is proposed which is based on electrical discharge machining (EDM) induced controllable burning of the workpiece to be machined. This process utilizes the flammability of a metal, especially difficult-cutting metal, and uses a slotted conductive wheel to grind. First, an EDM induced discharge is generated between the wheel and the material. Then the gap is filled with combustion-supporting oxygen to induce the material to burn and soften, and the burned and soften layer is subsequently removed. Work on titanium alloy TC4 by burned grinding is compared with EDM grinding and mechanical grinding. The material removal rate (MRR), surface quality, spindle motor power change, etc., are analyzed. The result shows that burned grinding can improve the discharge efficiency with an roughness of 0.59 μm, similar to that of mechanical grinding, while the roughness of EDM is 1.29 μm. Because there is a softened layer in burned grinding, when the cutting depth is less than the softened layer, the spindle motor power increase from the no-load condition of burned grinding is respectively 95.2% and 96.8% less as compared with EDM grinding and mechanical grinding. This technology may improve the grinding performance of difficult-cutting materials greatly.

Key words: titanium alloy, electrical discharge machining, burning, grinding, surface quality

CLC Number:

WANG Lin, LIU Zhidong, QIU Mingbo, TIAN Zongjun, YU Jianyuan. Study of TC4 Controllable Burned Efficient Grinding Induced by Electrical Discharge Machining[J]. ACTA AERONAUTICAET ASTRONAUTICA SINICA, 2012, 33(8): 1524-1530.

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Study of TC4 Controllable Burned Efficient Grinding Induced by Electrical Discharge Machining

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