Based on orthogonal regression experiments, an empirical equation for heating resistance of EHM was established, data shows that the cutting current has the largest influence on the heating resistance. This empirical equation was adopted in the finite element simulation (FES), an empirical equation was obtained to describe the temperature rising generated by joule heat of the heating resistance. With 3D cutting model and Umbrello constitutive equations, both 3D finite element simulation and verification experiments were carried out to study the cutting force and temperature field in the EHM, results show that low cutting force appears when cutting current I≥160A, the highest temperature of the cutting area shows at the cutting scrap of the deformation area, the optimal heating current I which gives the correspondent optimal cutting temperature is 168A~190A.
基金资助:辽宁省科技计划资助项目(2009220022)
Liaoning Provincial Science and Technology program ( No. 2009220022)
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