Transactions of Materials and Heat Treatment

Title：Research on pre-stretching residual stress analysis and machining deformation control of slender shaft

Authors： Zhang Qi Xu Hongtu Tian Tiantai1 Han Bin Wang Jucun Chen Chaoqun Li Jun

Unit： Xi′an Jiaotong University AECC South Industy Company Limited

KeyWords： slender shaft pre-stretching machining deformation stress control three-point bending

ClassificationCode：TH69

year,vol(issue):pagenumber：2021,46(4):180-184

Abstract：

Aiming at the problem of machining deformation caused by the release of internal stress in the process of slender shaft machining, a new method of adjusting and controlling the internal stress of slender shaft by axial pre-stretching was proposed. In order to make a comparative study, three-point bending method was used to exert internal stress on the shaft, and the influence laws of axial stretching on residual stress and subsequent machining deformation were analyzed. The numerical model of three-point bending and axial stretching of slender shaft were established by ABAQUS software, and the material removal and deformation of slender shaft were simulated by birth-and-death element method. The residual stress and machining deformation of slender shaft under different pre-stretching rates were studied, and the experimental verification of axial stretching and machining for slender shaft was carried out. The results show that the axial internal stress can be redistributed by pre-stretching, and the main residual stress of slender shaft after unloading is tensile stress, which is distributed along the axial direction. And with the increasing of stretching amount, the subsequent machining deformation decreases gradually.

Funds：

中国航空发动机集团重难点和瓶颈问题攻关项目（F9N30K337）；中央高校基本科研业务费专项资金资助(zrzd2017027)

张琦（1978-），男，博士，教授 E-mail：henryzhang@xjtu.edu.cn

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