| 摘要: |
| 以焊接厚度为5mm的2219-T87铝合金为对象，基于库卡重载工业机器人系统，自主设计了静轴肩搅拌头，进行了焊接工艺试验，研究了工艺参数对焊缝成形、焊接缺陷、接头组织及性能的影响，优化获取了焊接工艺规范。结果表明，设计的静轴肩搅拌头匹配优化的工艺参数能稳定实现2219铝合金静轴肩搅拌摩擦焊接，焊缝表面光滑平整，内部无缺陷，在搅拌针转速1200r/min、焊速190mm/min时，接头抗拉强度可达333MPa、延伸率5%。研究结果为2219铝合金静轴肩搅拌摩擦焊工程应用奠定基础。 |
| 关键词: 2219铝合金 静轴肩搅拌摩擦焊 搅拌头结构设计 组织性能 |
| 基金项目:四川省科技计划项目资助（2021YFG0057） |
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| Research on Robotic Stationary Shoulder Friction Stir Welding Process of Aluminum Alloy |
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Zhu Zhi Zheng Sengmu Ou Xiaoqin Yu Chao Wang Xiangdong Song Haibin Tang Shuai Su Yinan
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Sichuan Aerospace Changzheng Equipment Manufacturing Co., Ltd., Chengdu 610100
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| Abstract: |
| Based on KUKA heavy load industrial robot, the stationary shoulder friction stir welding tool was designed and the welding experiment was completed with 2219-T87 aluminum alloy of 5mm thickness. The effect of welding parameters on weld formation, welding defect, microstructure and mechanical property of the weld joint were studied, and then the welding parameters were optimized. The result showed that the stationary shoulder friction stir welding process could stably complete with the designed tool when matching the optimized process parameters. The surface of the weld seam was smooth, and there is no defect in the joint. When welding with rotation speed of 1200r/min and welding speed of 190mm/min, the welding joint tensile strength was up to 333MPa and the elongation up to 5%. The results of the study provided a basis for engineering application of stationary shoulder stir friction welding of 2219 aluminum alloy. |
| Key words: 2219 aluminum alloy stationary shoulder friction stir welding structure design of friction stir tool microstructure and mechanical property |
