发动机气门电热镦粗工艺参数分析与计算

Analysis and calculation of parameters in electrical upsetting process for engine valves

电热镦粗是一种先进的塑性成形方法 ,但目前生产中仅能靠经验来确定加热电流、镦粗压力、速度等工艺参数。本文分析了电热镦粗的工艺过程以及各工艺参数的作用 ,根据塑性力学、热力学原理和热电效应 ,推导了各参数的理论计算方法 。

Electrical Upsetting is an advanced forming process In practice the process parameters could only be determined by experiments This paper analyzes electrical upsetting process and the parameters Based on plastic theory, thermodynamics and electric\|heating effect theory,the calculation methods of the parameters are deduced These methods provide foundation for the optimum control of the process