搅拌摩擦焊过程中搅拌头受力与变形的计算方法  

Computational method for stress and deformation of stir-head in friction stir welding

作　　者：张昭[1] 陈金涛[1] 张洪武[1] 

机构地区：[1]大连理工大学工程力学系工业装备结构分析国家重点实验室,116024

出　　处：《焊接》2010年第9期29-32,共4页Welding & Joining

基　　金：国家自然科学基金青年科学基金项目(10802017)资助

摘　　要：提出了搅拌摩擦焊过程中搅拌头受力的计算方法,基于搅拌针的受力情况,对搅拌头在搅拌摩擦焊过程中的变形进行了计算。计算结果表明,搅拌摩擦焊中的温升对改善搅拌头受力具有非常重要的影响,提高焊接温度,将大大降低搅拌头在焊接过程中行进时所受的力,这将极大提高搅拌头的使用寿命。由于变形量很小,因此,可以认为搅拌针在焊接过程中的变形对焊缝形成没有影响。Computational method for stress of stir-head in friction stir welding was proposed. Based on the calculated stress of stir-head, the deformation of stir-head in friction stir welding process was further computed. Computational results showed that the temperature rise in friction stir welding is very important for the stress of stir-head. The increase of the temperature can lead to the decrease of the stress of stir-head in the welding process,which can be beneficial to the increase of fatigue life of stir-head. Due to the small deformation of stir-head, it can be believed that the effect of the deformation of stir-head on formation of the weld is very small.

关 键 词：搅拌摩擦焊 搅拌头 纵向力 横向力 

分 类 号：TG404[金属学及工艺—焊接]