搅拌摩擦焊中工艺参数对扭矩的影响
Effect of process parameters on torque in friction stir welding
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摘要: 通过在6056-T6的铝合金薄板上设计不同旋转频率、不同下压量的搅拌摩擦点焊试验,测量焊接过程中的搅拌头扭矩、下压作用力和试板温度曲线来研究焊接工艺参数对扭矩的影响.结果表明,在旋转频率相同而下压量不同的试验中,搅拌头扭矩随下压作用力增大而增大,而引起扭矩增大的最主要原因是下压作用力使搅拌区材料的力学性能发生了改变;在下压量相同而旋转频率不同的焊接试验中,搅拌头扭矩随旋转频率升高而减小,但扭矩和旋转频率的乘积(即焊接热输入功率)却随旋转频率升高而增大,分析认为旋转频率通过温度和材料的应变速率两个途径对搅拌头扭矩产生了影响,而温度的影响作用更显著.Abstract: Experiments with stir tool kept rotating at the same position on 6056-T6 aluminium alloy sheet were carried out,and the torque of stir-head,down force and welding temperature were all recorded during this process.The experimental results show that the torque will increase with the increasing of down force;the reason for torque increase is that the down force strengthens the material in stir zone.Although the torque will decrease with the increasing of rotation speed,the product of torque and rotation speed which corresponds to the heat generation will increase with the increasing of rotation speed.The rotation speed influences the torque through two ways of welding temperature and strain rate of material in stir zone,and the influence from the former way is more significant.
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Keywords:
- friction stir welding /
- torque /
- down force /
- rotation speed /
- heat generation
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期刊类型引用(5)
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3. 李健，张猛，吕亚君. 4043铝合金焊材生产关键技术研究. 云南冶金. 2023(02): 90-95 . 百度学术
4. 乔波，战中学，张登峰，高世鹰，刘春兰，邬富宝，张世全，郑宏伟，王晓婷，李庭. 4043铝合金热变形行为和热加工图. 热加工工艺. 2019(19): 104-106+109 . 百度学术
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