| 张轩,刘小振,吴思楠,傅波.超声辅助搅拌摩擦焊仿真分析及实验*[J].,2023,42(4):683-692 |
| 超声辅助搅拌摩擦焊仿真分析及实验* |
| Simulation analysis and experimental study of ultrasonic assisted friction stir welding |
| 投稿时间：2022-04-10 修订日期：2023-06-29 |
| 中文摘要: |
| 为解决传统的搅拌摩擦焊（FSW）工艺存在的轴向压力过大、搅拌头易磨损、表面焊接质量有待提高等问题，设计了一种集搅拌头与夹心式纵扭超声振动换能器为一体的超声辅助搅拌摩擦焊（UAFSW）工具头。对UAFSW工具头进行了模态分析与谐响应分析，确保换能器结构满足要求。应用ANSYS和COMSOL，对UAFSW进行了流体场、温度场和声场仿真分析，验证了FSW过程中加入纵扭超声振动能够增强材料的软化率，提高焊接材料的塑性流动。搭建实验平台，进行了铝合金6061的UAFSW焊接实验，结果表明，纵扭超声的引入能够提高焊接过程中材料流动性，减小搅拌头的前进阻力和轴向压力，改善了焊接表面质量，在焊头转速900r/min、焊接速度1.4mm/s、轴向压力2.6kN、超声功率100W时，焊接效果最好。 |
| 英文摘要: |
| In order to solve the problems of the traditional friction stir welding (FSW) process, such as excessive axial pressure, easy wear of the mixing head, and the welding quality of the surface to be improved, an ultrasonic assisted friction stir welding (UAFSW) tool head integrating the mixing head and ultrasonic transducer is designed. The modal analysis and harmonic response analysis of the longitudinal torsion ultrasonic transducer are carried out to ensure that the transducer structure can meet the experimental requirements. The fluid field, temperature field and sound field of UAFSW are simulated by ANSYS and COMSOL. It is verified that ultrasonic can enhance the softening rate of materials and improve the plastic flow of welding materials in FSW process. The experimental platform is built and the UAFSW welding experiment of aluminum alloy 6061 is completed. Results show that ultrasonic vibration can improve the fluidity of materials in the welding process, reduce the forward resistance and axial pressure of the mixing head, and improve the welding surface quality. The welding effect is the best when the head rotation speed is 900 r/min, welding speed is 1.4 mm/s, axial pressure is 2.6 kN, and ultrasonic power is 100 W. |
| DOI：10.11684/j.issn.1000-310X.2023.04.003 |
| 中文关键词: 超声辅助搅拌摩擦焊 纵扭超声振动换能器 仿真分析 焊接参数 |
| 英文关键词: ultrasonic assisted friction stir welding longitudinal torsion ultrasonic transducer simulation analysis welding parameters |
| 基金项目:四川省科技计划资助项目（2020YFG0117），川大-自贡校地科技合作专项资金项目（2020CDZG-1）, 川大-宜宾战略合作专项资金项目（2019CDYB-1） |
|
| 摘要点击次数: 502 |
| 全文下载次数: 656 |
|
查看全文
查看/发表评论 下载PDF阅读器 |
| 关闭 |
