Haitao Jia and Jianguo Fang
Finite element model, energy method theory, wrinkling, stampingforming, orthogonal test
To solve the problem of wrinkling during the stamping process of thin-walled hyperbolic metal covering, in-depth research was conducted on the mechanical behaviour and deformation mechanism of materials, and experimental verification and process optimisation were carried out. In addition, an orthogonal experiment was designed with thickness as the experimental verification index. Factor A is defined as the blank holding force and factor C is defined as the radius of the die inlet fillet. The results of the test indicated that factor A crimping force has the most significant impact in the process of forming metal cladding stamping, while factor C stamping speed has the least influence. The difference in each factor was extreme, with a rating of RA>RD>RB>RE>RC. The most effective process parameters were a crimping force of 1,350 N, a coefficient of friction of 0.20, a recessed die inlet fillet radius of 2.5 mm, a blank diameter of 120 mm, and a stamping speed of 4.5 mm/min. The analysis of variance (ANOVA) indicated that Factor A has the most significant impact, followed by Factor C, which has a more significant effect on the size of the recessed die inlet fillet. The above research results provide theoretical guidance for the stamping forming of metal coatings and have significant practical significance.
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