Effects of TVSR process on the dimensional stability and residual stress of 7075 aluminum alloy parts
Source abstract
Abstract
Abstract Residual stress generated during the blank forming and machining process significantly influences the dimensional stability of the mechanical parts. The equivalent bending stiffness and thermal vibration stress relief (TVSR) are two factors that affect the deformation of thin-walled workpiece. To increase the machining accuracy, on the one hand, increase the equivalent bending stiffness in manufacturing, and on the other hand, usually conduct the stress relief process to reduce the residual stress in manufacturing. In the present study, morphology optimization and TVSR process are conducted on a thin-walled part Specimen B of 7075 aluminum alloy to control the residual stress and machining deformation before finish machining. As a contrast, Specimen A is machined in one step. The deformations vary with time of Specimen A and B are measured. The corresponding finite element model is built to further study the stress and distortion during the machining process. Results showed that (1) deformation decreased with the increase of equivalent bending stiffness, compared with Specimen A, the maximum deformation of Specimen B decreased by 58.28%. (2) The final maximum deformation of Specimen B can be reduced by 38.33% by topology reinforcement to improve the equivalent stiffness and TVSR to reduce the residual stress.
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Research context
OpenAlex topics: Advanced machining processes and optimization · Advanced Surface Polishing Techniques · Advanced Machining and Optimization Techniques
SciVX discovery tags are terminology-based. OpenAlex topics are source-provided classifications.
Affiliations
School of Mechanical and Vehicle Engineering, Beijing Institute of Technology , Beijing , 100081 , People’s Republic of China
China Research and Development Academy of Machinery Equipment , Beijing , 100089 , People’s Republic of China
General Department, Shanghai Institute of Aerospace Technology , Shanghai , 201109 , People’s Republic of China
School of Mechatronical Engineering, Beijing Institute of Technology , 5 Zhongguancun South Street, HaiDian District , Beijing , 100081 , People’s Republic of China
Quality Department, Shanghai Space Propulsion Technology Research Institute , Huzhou , 313000 , People’s Republic of China
References (39)
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