Transactions of Materials and Heat Treatment

Title：Behavior changes of temperature of deformation zone in aluminum alloy during power spinning process

Authors： Chai Guoqiang Li Defu

Unit： General Research Institute for Non-ferous Metals

KeyWords： power spinning deformation heat thickness reduction ratio

ClassificationCode：TG146.2

year,vol(issue):pagenumber：2015,40(11):112-116

Abstract：

The mathematical model of temperature changes in three roller power spinning deformation zone was built for the aluminum alloy thin-walled precision cylindrical parts. The change regularity of temperature in the deformation zone and its influence on spinning process were calculated and analyzed. The results show that the temperature in the deformation zone rises up to 160 ℃ and the deformation resistance reduces by 40 MPa obviously. Based on the influence of changing temperature in the deformation zone on thickness reduction ratio, the conception of consistency was proposed, which provided a theoretical guidance for the spinning of cylindrical parts of thin-walled high-precision aluminum alloy. The thermal expansion in the thickness direction of the blank is caused by the temperature change of the spinning deformation zone, and the maximum thermal expansion amount is up to 85 μm. The nominal thinning rate is inconsistent with the actual thinning rate, and the error rate of wall thickness reduction is 12%.

Funds：

国家科技支撑计划资助项目(2011BAE23B02)

柴国强（1983-），男，博士研究生，工程师

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