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Study on Residual Stress in Disc-Milling Grooving of Blisks
Hongmin Xin1,2, Taotao Xing1, Hui Dai1
1Hubei Key Laboratory of Power System Design and Test for Electrical Vehicle, Hubei University of Arits and Science, Xiangyang 441053, China.
Abstract:
The disc-milling method is expected to increase the grooving efficiency of blisks. However, there are few studies about the residual stress on a blisk during disc-milling grooving. In this study, a single-factor experiment and an orthogonal experiment of blisk disc-milling and grooving were designed to obtain the residual stress. Surface subsurface residual stress were also studied. The results showed that the surface of the milling groove bore compressive stress. Residual stress decreased with increasing spindle speed and increased with increasing feed speed and spindle rotation angle. Moreover, residual stress was most sensitive to spindle rotation angle and least sensitive to feed speed. A higher residual stress produced on the machined surface led to a deeper layer of residual stress.
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