厚板搅拌摩擦焊多维动态压电测力仪研究  

Study on multidimensional dynamic piezoelectric dynamometer for friction stir welding of thick plate

作　　者：佟生 任宗金[1] 张军[1] 王郁赫 TONG Sheng;REN Zongjin;ZHANG Jun;WANG Yuhe(School of Mechanical Engineering,Dalian University of Technology,Dalian 116024,China)

机构地区：[1]大连理工大学机械工程学院,辽宁大连116024

出　　处：《传感器与微系统》2024年第10期35-37,41,共4页Transducer and Microsystem Technologies

基　　金：国家自然科学基金资助项目(52075079);国家重点研发计划资助项目(2019YFA0709003)。

摘　　要：针对18mm厚2219铝合金搅拌摩擦焊过程焊接力变化范围大、速度快,导致难以准确测量的问题,设计了一种大量程四支点压电测力仪,主向100kN、侧向8 kN。经理论推导发现测力仪上板厚度及跨距是影响传感器输出的主要因素,利用有限元仿真对二者进行参数化分析,在满足现有测力单元量程基础上确定了其合理取值。最后对测力仪进行了静态标定、动态冲击实验,结果表明:测力仪线性度误差小于0.62%、向间干扰小于0.65%,固有频率大于1000Hz,达到了焊接过程跨尺度多维力测试精度要求。In order to solve the problem that the welding force of 2219 aluminum alloy with 18mm thickness variation range is wide and the speed is fast in friction stir welding(FSW)process,which lead to the difficulty of accurate measurement,a large-range four-fulcrum piezoelectric dynamometer with the principal of 100 kN and the lateral of 8 kN is designed.Through theoretical derivation,it is found that the thickness and span of the upper plate of the dynamometer are the main factors affecting the output of the sensor.The parametric analysis of the two factors are carried out by finite element simulation,and the reasonable valuing is determined on the basis of satisfying the range of the existing force measuring unit.Finally,the static calibration and dynamic impact experiment of the dynamometer are carried out.The results show that the nonlinearity of the dynamometer is less than 0.62%,the interdirectional interference is less than 0.65%,and the natural frequency is more than 1000 Hz,which can meet the requirement of multi-dimensional force measurement precision in the welding process.

关 键 词：大量程 压电测力仪 参数化 标定实验 搅拌摩擦焊 

分 类 号：TH823[机械工程—仪器科学与技术]