Papers by Keyword: Electric Hot Machining

Abstract: Electric hot machining (EHM) can improve the cutting performance by heating resistance, consisting of metal resistance and constriction resistance, which softens the material in the deformation zone. In this paper, we present the 3D model for heating resistance and analyze its variance with experimental verification. The results show that 3D model for heating resistance can describe heating resistance well in EHM under this experiments condition.

Abstract: In this paper, we investigate the relationship of heating current in Electric Hot Machining with tool life, cutting parameters and machined surface roughness. Experimental results indicate that there is an optimal heating current in EMH in which the effect of hot machining is the best. A method of rapid determining the optimal heating current under various cutting conditions in EHM is proposed according to the conservation law of optimum cutting temperature. That is, for a certain combination of tool and workpiece, the heating current relative to optimal cutting temperature in different conditions can be found by changing heating current and measuring cutting temperature to meet the control object of temperature in EHM. The PID control principle and effect of computer monitoring system for realizing optimal heating current control in EHM is also introduced.