Transactions of Materials and Heat Treatment

Title：Optimization and application of loading trajectory in stretch forming of skin based on digital

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ClassificationCode：V260; TG386

year,vol(issue):pagenumber：2021,46(1):56-59

Abstract：

For the skin parts of flat tail leading edge for plane, the optimization idea on loading trajectory in stretch forming by digital method was proposed. Firstly, the stretching rate and covering angel required for part forming were calculated, then the loading trajectory was simulated by using the stretch forming process design and manufacture system for plane skin, and an optimized jaw motion trajectory with high forming accuracy was obtained. Secondly, the motion trajectory was transformed to boundary conditions. The thinning and sticking mold conditions were analyzed by Pam-stamp finite element simulation after stretch forming to show the rationality of the optimized loading trajectory. Finally, the loading trajectory with twice stretch forming was proposed, and the motion trajectory of stretch forming for equipment jaw was automatically generated. The stretch forming test was carried out using the 2A12 aluminum alloy sheet material of O status with the thickness of 3.5 mm. The results show that the thickness distribution of formed part is uniform (3.18-3.29 mm), the effect of sticking mold is better, and there is no forming defects. It verifies the feasibility of this optimization idea on loading trajectory based on digital, and it lays a foundation for the development of intelligent accurate manufacturing technology.

Funds：

基金项目:国家自然科学基金资助项目（51605310）

作者简介：谢洪志（1985-），男，学士，高级工程师 E-mail：xhz_0920@163.com

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