中文摘要：

定义了导电加热切削中加热电阻的结构及所在区域，根据加热回路的特点，提出了一种精确检测加热电阻的方法，有效排除了回路电感和电缆电阻等因素的影响．在此基础上通过实验研究了切削深度、进给量和切削速度对加热电阻的影响，并建立了相应的经验公式．基于加热电阻和切削用量的关系，分析了切削用量的变化对加热功率的影响，并提出通过对加热电阻的检测来判断切削用量的变化状况，进而实现对加热电流的自动调整，并用实验进行了验证．

英文摘要：

This paper defines the structure and zone of heating resistance in electric hot machining, and proposes an accurate detection method of heating resistance according to the characteristics of heating circuit, by which the influences of circuit inductance and cable resistance can be effectively eliminated. Then, the effects of cutting depth, feed and speed on the heating resistance are experimentally investigated, and an experiential formula is de- duced. Moreover, based on the relationship between the heating resistance and the cutting condition, the effect of cutting condition on the heating power is analyzed, and a method of cutting condition determination according to the heating resistance is proposed. Thus, the heating current can be automatically adjusted. The effectiveness of the proposed method is finally verified by experiments.