The influence of the tool profiles on the thermo-mechanical interaction between AA6061-T6 workpiece and tool during friction stir welding was investigated. A customized experimental setup was employed to measure the f...The influence of the tool profiles on the thermo-mechanical interaction between AA6061-T6 workpiece and tool during friction stir welding was investigated. A customized experimental setup was employed to measure the feature points temperature and tool spindle torque in the process of FSW. Microstructure and tensile properties of stir zone (SZ) were characterized. Results indicate that the shoulder and pin geometries were responsible for the heat generation, tool torque variation at the plunging stage as well as the cross section contour of SZ, respectively. Finer grains in SZ resulted from flutes on shoulder and grooves on pin. Flat faces on the pin resulted in inhomogeneous grain size. Weld with higher 0.2% yield strength of 173 MPa was obtained by using the cylindrical pin tool while higher elongation weld of 32.0% was produced with triflat threaded pin tool.展开更多
对搅拌摩擦焊技术发展进行了简要介绍,分析了搅拌摩擦焊中工艺影响因素,结合目前电主轴的发展趋势——动静压电主轴,在铝合金搅拌摩擦焊电主轴单元关键技术研究的基础上,确定电主轴的工艺参数,设计研发一种新型的立式搅拌摩擦焊动静压...对搅拌摩擦焊技术发展进行了简要介绍,分析了搅拌摩擦焊中工艺影响因素,结合目前电主轴的发展趋势——动静压电主轴,在铝合金搅拌摩擦焊电主轴单元关键技术研究的基础上,确定电主轴的工艺参数,设计研发一种新型的立式搅拌摩擦焊动静压电主轴,具有自动调节负荷的功能,并对主轴的结构设计、油腔结构和运行状态进行详细的介绍,并利用Solid Works Simulation对转子轴静态受力进行模态分析,经初步检测符合设计要求。较好地解决了搅拌摩擦焊主轴适用材料窄、滚动轴承寿命短、转轴承载负荷过大和主轴可靠性差等问题。展开更多
基金financial support from the Independent Innovation Plan of Colleges and Universities in Ji’nanthe Scientific Research Foundation for the Returned Overseas Chinese Scholars,State Education Ministry
文摘The influence of the tool profiles on the thermo-mechanical interaction between AA6061-T6 workpiece and tool during friction stir welding was investigated. A customized experimental setup was employed to measure the feature points temperature and tool spindle torque in the process of FSW. Microstructure and tensile properties of stir zone (SZ) were characterized. Results indicate that the shoulder and pin geometries were responsible for the heat generation, tool torque variation at the plunging stage as well as the cross section contour of SZ, respectively. Finer grains in SZ resulted from flutes on shoulder and grooves on pin. Flat faces on the pin resulted in inhomogeneous grain size. Weld with higher 0.2% yield strength of 173 MPa was obtained by using the cylindrical pin tool while higher elongation weld of 32.0% was produced with triflat threaded pin tool.
文摘对搅拌摩擦焊技术发展进行了简要介绍,分析了搅拌摩擦焊中工艺影响因素,结合目前电主轴的发展趋势——动静压电主轴,在铝合金搅拌摩擦焊电主轴单元关键技术研究的基础上,确定电主轴的工艺参数,设计研发一种新型的立式搅拌摩擦焊动静压电主轴,具有自动调节负荷的功能,并对主轴的结构设计、油腔结构和运行状态进行详细的介绍,并利用Solid Works Simulation对转子轴静态受力进行模态分析,经初步检测符合设计要求。较好地解决了搅拌摩擦焊主轴适用材料窄、滚动轴承寿命短、转轴承载负荷过大和主轴可靠性差等问题。
