锻压技术

T形盒形件拉延冲压工艺优化

英文标题：Optimization on drawing and stamping process for T-shaped box

作者：鲜敏彭威于培师赵军华

单位：江南大学

分类号：TG386.3

出版年,卷(期):页码：2019,44(12):20-26

摘要：

以T形盒形件的成形性能为研究对象，首先对材料5754铝合金、6016铝合金、DC03钢和SPCE钢进行拉伸实验和杯突实验，得到材料的力学性能指标。然后通过数值模拟方法，定量地研究了冲压工艺参数（毛坯形状、摩擦力、冲压速度和压边力）和数模尺寸（倒角半径和转角处倾斜台角度）对T形件冲压成形性能的影响规律。最后采用有限元模拟指导某汽车电子控制系统覆盖件（T形盒形件）的研发，通过增大第1次拉延数模的顶部圆角半径和倾斜台角度，成功解决了该产品起初试模转角处破裂的问题。以T形件的最大减薄率为评价指标，结果表明，可以通过增加转角处倾斜角和凸凹模之间的润滑来提高T形件的成形质量。

For the formability of T-shaped box, firstly, the mechanical properties of 5754 aluminum alloy, 6016 aluminum alloy, DC03 steel and SPCE steel were obtained by tensile test and cupping test respectively, and the influences of stamping process parameters (blank shape, friction force, stamping speed and blank holder force) and numerical model sizes (chamfer radius and angle of inclined table at corner) on the stamping formability of T-shaped parts were quantitatively studied by numerical simulation. Then, the finite element simulation was used to guide the research and development of a cover for an automobile electronic control system, and the problem of product cracking at the corner in the initial test was successfully solved by increasing the top fillet radius and the angle of inclined table of the numerical model for the first drawing. The maximum thinning rate of T-shaped part was taken as an evaluation index, the results show that the forming quality of T-shaped part can be improved by increasing lubrication between punch and die,as well as the angle of inclined table at corners.

基金项目：

国家自然科学基金面上项目（11572140）；中国博士后科学基金（2018M630513）

鲜敏（1992-），男，硕士研究生 E-mail：jndx_xianmin@163.com 通讯作者：赵军华（1979-），男，博士，教授 E-mail: junhua.zhao@163.com

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