Transactions of Materials and Heat Treatment

Title：Optimization design of strip blanking blade of multistation progressive die for complex automotive structural parts

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ClassificationCode：TG386

year,vol(issue):pagenumber：2022,47(1):153-160

Abstract：

The strip blanking blade of complex automotive structural part is designed according to its unfold outline. Because the contour line is a complex curve, the blade of different shapes makes its design more complicated. Therefore, based on the cutting concept at the inflection points of concave feature for contour curve, an optimization design method of blanking blade was proposed. First, the characteristics of the strip and its blade were summarized, analyzed and studied, and the general design criteria of blanking blade was proposed. Then, depending on the requirements of the blade convexity, the concave points of the contour curve relative to the blanking area were extracted. Based on the concave pole points, the cutting lines were made along the feeding direction, and the blanking was cut into several special-shaped areas. Furthermore, based on the area ratio of the special-shaped area to its rectangular containment box, the segmentation lines of the blanking area were optimized, and the blade segmentation schemes were obtained. Finally, the optimization layout scheme of the blanking blade station was obtained by constructing the minimum distance between the center of the combined blanking force for each blade and the center of the blanking die. The examples show that the blanking blades obtained by the optimized design meets the requirements of convexity quality, which provides strong support for strip automated intelligent design in the multi-station progressive die.

Funds：

容桂科技计划项目(容桂经发(2017)27号-8)

作者简介：李贵（1983-），男，博士，副教授 E-mail：leegui2030@wust.edu.cn

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