Transactions of Materials and Heat Treatment

Title：Study on machining precision of thin wall long hollow shaft for aeroengine

Authors： Ma Pengju Xu Zhiyong Cheng Xiang Zheng Xuezhu Liu Yong Wang Jucun Tian Jie

Unit： Beihang University China Aviation Industry Southern Airlines (Group) Co. Ltd. Xi′an Innovation Precision Instrument Research Institute

KeyWords： rotary swaging thin wall long hollow shaft finite element analysis coaxiality surface roughness

ClassificationCode：TH161；TG316

year,vol(issue):pagenumber：2017,42(3):1-10

Abstract：

The rotary swaging is a new technology for manufacturing thin wall long hollow shaft of aero-engine. Firstly, the principle and process features of rotary forging were introduced. Then, the experiment based on features of thin wall long hollow shaft on independent-developed rotary forging machine was designed and the test results were analyzed and discussed by the finite element numerical analysis method. Finally, the test results were verified on the products. The results show that the machining accuracy can be ensured by rotary forging, especially for increasing inner hole coaxial precision and ensuring wall thickness uniformity. Furthermore, the surface roughness of workpiece can be enhanced, and its mechanical properties can be improved. Compared with the existing process of inner hole of thin wall long hollow shaft, rotary swaging process has obvious advantages: the plastic of forging process with pulse loading to the swaging materials increases by 2.5-3 times than that of continuous loading. So, rotary forging can achieve high accuracy with roundness ±0.005-±0.1 mm, the coaxial precision is up of 50%, and inner surface roughness is less than 0.05 μm.

Funds：

高档数控机床与基础制造装备科技重大专项（2014ZX04001021）

马鹏举（1961-），男，博士，副教授许志永（1988-），男，硕士研究生

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