锻压技术

汽车前地板单动拉延成形工艺分析与数值模拟

英文标题：Process analysis and numerical simulation on single drawing for automobile front floor

作者：翁茂荣李强曹淼龙

分类号：TG385.2; TG386.1

出版年,卷(期):页码：2015,40(5):48-51

摘要：

以某型号微型面包车的前地板拉延成形过程为例，对材料特性进行分析，并建立数学建模后，进行冲压模拟分析。选取冲压成形工艺参数中的压边力、凸凹模间隙和拉延筋高度3个因数进行正交试验分析，以坯料的局部最小厚度为优化目标值，以防止产生拉裂现象。冲压数值模拟分析表明，压边力最显著，拉延筋高度为其次，凸凹模间隙为最次。为保证前地板冲压成形的均匀性，最佳工艺参数为压边力950 kN、凸凹模间隙0.84 mm、拉延筋高度6 mm,并对前地板零件进行验证。验证结果表明，成形表面较为光顺，且无裂纹，虽在曲率变化较大的区域有少量褶皱外，但冲压质量完全符合前地板设计要求。

For the example of single drawing process of the front floor for a certain small van, the material characteristics of drawing process were analyzed, and the simulation analysis of stamping process was carried out after the mathematical model being established. The analysis of orthogonal experiments was made by selecting three impact factors such as binder force, the gap between die and punch and draw-bead depth in stamping process parameters. The local minimum thickness of blank was regarded as the optimization target value in order to prevent cracking. The simulation results of stamping show that the series of impact factors are binder force, draw-bead depth, and the gap between die and punch respectively. The best optimization parameters of stamping process are confirmed by the binder force of 950 kN, the gap between die and punch of 0.84 mm, and the draw-bead depth of 6 mm. The actual production was tested and verified. The experimental results show that the forming surface of front floor is comparatively smooth without obvious microcracks. Although there are some folds in the transformation zone with large curvature, the stamping quality is completely satisfied with the design requirements of front floor.

基金项目：

浙江省自然科学基金资助项目（LY13E050112）；浙江省科技厅公益技术研究项目（2013C32099）

翁茂荣（1961-），男，硕士，副教授

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