【摘要】 为了探明点焊过程中通过电极散失热量的过程和机理,展开了对电阻点焊电极热输入机理问题的分析和研究,基于有限元法(FEM)提出并建立了电极热输入计算模型,并根据模拟仿真策略对电极瞬态热输入的成分和大小进行了分析和探讨,最后通过试验验证了分析的结论。结果表明,点焊过程中散入到电极的热可分为电阻热和传导热两部分,电阻热流的变化规律与焊接电流一致,而传导热流则在电极输入热中占主导地位。此工作有助于电极散热和焊接质量控制等方面的研究。更多还原

【Abstract】 In order to study the heat dissipation of electrode during the spot welding process,the heat input mechanics of electrode for spot welding was analyzed in detail firstly.Then,the heat input model for electrode was built based on the finite element method(FEM) and the information of heat input during the welding process was analyzed.Finally,experiment was carried out to validate the conclusion.It’s found that the dissipating heat of electrode was made of resistance heat and conduction heat.The resistance heat had the same law with the welding current and the conduction heat was the major part of the dissipating heat.This research is helpful to the further study on heat dissipation of electrode and quality control of spot welding.更多还原