Structure of Mold Surface for Stress Relaxation Forming of Integral Panel of 2124 Aluminum Alloy

Abstract:

This paper proposed a method and process of stress relaxation forming based on initial geometric springback compensation-finite element optimization-revision by experiment iteration. Obtained material parameters of 2124 aluminum alloy by a series of foundation craft experiments; springback law on the structure of 2124 aluminum alloy by foundation experiment of autoclave forming of T test specimens, that use to compensate the mold surface with the geometric springback. The precision of the geometric springback compensation of the mold surface is about 3 mm; while after the finite element iteration optimization on the mold surface with the initial geometric springback compensation, the deviation of that between the testing date and the theory appearance of specimens can reach the magnitude about ±1.2 mm. Next use the mold “frequency domain” revision algorithm based on experiment iteration to revise local mold surface of the stress relaxation forming. The testing date shows the precision control in ±0.5 mm that satisfied with the application of engineering.

• Periodical: Applied Mechanics and Materials (Volumes 152-154)
• Pages: 140-144
• DOI: https://doi.org/10.4028/www.scientific.net/AMM.152-154.140
• Online since: January 2012
• Authors: Zhong Gan, Yu Ping Wu, Jia Zan Zhu, Hai Bing Tan
• Keywords: Finite Element Optimization, Geometric Springback Compensation, Mold Revision among Frequency Domain, Stress Relaxation Forming

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