锻压技术

单侧载体多工位级进冲模模具结构偏载分析

英文标题：Eccentric load analysis on multi-position progressive die with single side carrier

作者：夏琴香姚小春张得良刘晓龙沈伟

分类号：TG385.2

出版年,卷(期):页码：2017,42(6):132-139

摘要：

以某汽车油箱支架结构件单侧载体多工位级进模为研究对象，通过对冲压成形过程进行全工序数值模拟获得了模具结构受力情况；针对第3工位中修边凸模受侧向力较大的现象对其进行偏载分析，获得了凸模的侧向变形量,并提出采用靠块结构来减小凸模的侧向变形；选择第3、第4、第9工位和合模时受力较大的冲压时刻，利用载荷映射系统将模具受力映射到结构分析的有限元模型上，对模具结构进行静力分析,并获得了模具结构在冲压方向和侧向的变形量；采用电阻应变测量方法对该多工位级进弯曲模在冲压成形过程中的应变值进行了测量。结果表明，采取靠块结构可有效地减小单侧载体多工位级进弯曲成形时的偏载，应变实测值与理论分析结果吻合较好。

For the multiposition progressive die with single side carrier for the car tank bracket, the forces acting on the die were obtained by numerical simulation of whole process, and the large lateral force acting on the trimming punch in the third position was analyzed by eccentric load. Then, the lateral distortion of trimming punch was obtained, and the method of decreasing the lateral distortion by adding block structure was proposed. Furthermore, at the stamping time of the third, fourth, ninth positions and die closing, the die structure was analyzed statically by mapping the force acting on the die to the FEA model for the structure analysis, and the distortion along the stamping and lateral directions was obtained respectively. Finally, the strains of die during stamping were tested by the resistance strain measurement method. The results show that the eccentric load decreases significantly in the multiposition progressive die with single side carrier by the adoption of block structure, and the tested strains conform to the theoretical analysis results well.

基金项目：

广东省高等学校高层次人才项目工业和信息化部2014年工业转型升级强基工程专项（D8143750）

夏琴香(1964-)，女，博士,教授

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