Transactions of Materials and Heat Treatment

Title：Forming process study and mold design of stiffener

Authors： HAN Lai-fu SHANG Zhi-quan YAN Jiang YANG Zhi-gang YIN Xiao-ping MA Jian-min

Unit： Inner Mongolia First Machinery Group Corporation

KeyWords： back punching stiffener wrinkling and wrapping stiffness

ClassificationCode：TG386

year,vol(issue):pagenumber：2013,38(3):118-121

Abstract：

To deal with the wrinkling, wrapping, necking and cracking during the stiffener forming process, the stiffener forming technology was analyzed and calculated. After the trial stamping, adjustment in real situation and the mass production, the optimum technology parameters of the stiffener of various thicknesses and materials were summarized. With the parameters, the height of the stiffener reaches the maximum without having necking and cracking, which solves the contradiction between stiffness improvement and crack. The die structure was improved according to the feature that the cushion power of the oil hydraulic press lagging behind the pressure of the main cylinder. A new idea was applied: the main cylinder was used for swaging, and the air cushion was used for back punching to form the stiffener. In this way, the wrinkling and wrapping problems are solved and the workload during roll smoothing is reduced, which achieves good effect.

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