线性摩擦焊顶锻端工件的微运动分析

摘要

The process of linear friction welding for titanium workpieces is observed under a highspeed camera. Then the law of the micromotion of the workpiece of the linear friction welding machine s push-forge end under high-frequency vibration is acquired.The impact on heat power of the welding interface is investigatedAnd the main cause and the reduction method of micromotion is analyzed by finite element method, which results show that the micromotion has great impact on heat power consumption of the welding interface to be 1/3 of ideal condition without micromotion in welding titanium alloy specimen.and the elastic deformation of the push-forge end is the main reason for the micromotion in this experiment.Be-sides, the optimized fixture of push-forge end effectively decreases the amplitude of micro-movement and improves the heat power of the welding interface.%在高速摄像机下观察钛合金试件的线性摩擦焊焊接过程,掌握了高频振动下该线性摩擦焊机顶锻端工件的微运动规律,分析其对焊接界面产热功率的影响,并且利用有限元方法分析了微运动产生的主要原因及降低的方法.结果表明,利用该线性摩擦焊机焊接钛合金试件的过程中,项锻端工件的微运动对焊接界面产热功率的损耗达到无微运动理想状态的1/3,顶锻端的弹性变形是引起顶锻端工件微运动的主要原因,通过改进顶锻端工件的夹具结构可以有效地减小微运动的幅度,提高了焊接界面产热功率.