Transactions of Materials and Heat Treatment

Title：Design on multi-position progressive die for left bracket

Authors： Wu Xiaohong

Unit： School of Intelligent Manufacturing and Equipment Jiangmen Polytechnic Institute

KeyWords： progressive die local forming pressing stiffener pressing bump small punch fixed by a sheath bending springback

ClassificationCode：TG76

year,vol(issue):pagenumber：2022,47(12):189-192

Abstract：

In order to solve the problem of material cracking in the forming process for the products with high forming height and dense local forming, the multiple forming method of pre-forming, pre-punching, re-forming and final shaping was adopted. The forming results show that the local forming height is eight times the thickness of material, there is no cracking in the production of product, and the product quality is stability. In order to solve the problem that the small punch is easy to break, a structure in which the small punch is fixed by a sheath is adopted, and as a result, the service life of the small punch is obviously increased. In order to solve the bending springback problem, the punch structure that reduces the contact area between bending punch and material is adopted, which increases the compressive stress in the bending zone and reduces the bending springback. The workpiece formed by the progressive die of left bracket fully meets the product quality requirements, and the die maintenance rate is low. The successful operation of the die shows that the combination of pre-punching and multiple forming can effectively improve the forming height of the convex hull with holes and prevent the material from cracking.

Funds：

广东海信宽带科技有限公司特派员工作站（20210425001187）

武晓红（1964-），男，学士，高级工程师 E-mail：wxh403@163.com

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