锻压技术

点压渐进成形工艺的数值模拟研究

英文标题：Research on numerical simulation of the incrementally pressing forming process

作者：张志刚王进李丽华

关键词：渐进成形锥杯零件壁厚运动轨迹

分类号：TG386

出版年,卷(期):页码：2016,41(3):134-139

摘要：

在普通单点渐进成形的基础上，通过改变工具头运动轨迹，形成了点压渐进成形工艺。为了研究点压渐进成形工艺的变形机理，以典型的锥杯零件为例，对普通渐进成形和点压渐进成形过程进行数值模拟，分析等效应变、壁厚、应变以及成形力的变化特点。并进行加工试验，将试验结果与数值模拟结果进行对比。试验和模拟结果表明：在均匀变形区域内，相比于普通渐进成形，点压渐进成形时零件的平均壁厚值更高，更接近理论壁厚值；最大主应变较小；所需Z轴方向成形力也更小。点压渐进成形时壁厚变化规律符合板料成形时壁厚的正弦定律，并且壁厚变化趋势与模拟结果吻合，验证了模拟结果的准确性。

On the basis of single point incremental forming（SPIF), the incrementally pressing forming(IPF) process was presented by changing the punch trajectories. In order to understand the deformation mechanism of incrementally pressing forming process, for the typical cone cup as an example, the incremental forming process and incrementally pressing forming process were simulated. It was analyzed the variation features of the equivalent strain, wall thickness, strain and forming force. Then the machining experiments were processed, and the results of experiment were compared with the results of numerical simulation. The results show that in the uniform deformation area, the average wall thickness of forming parts produced by incrementally pressing forming that closer to the theoretical value is higher, the major strain is smaller and the forming force along the Z-direction is also weaker. The wall thickness variation in incrementally pressing forming is in accordance with the sine regularity, and the simulation results match the tests in wall thickness changing trend. Therefore, the accuracy of the simulation result is verified.

基金项目：

国家自然科学基金资助项目（51205217）

张志刚（1990-），男，硕士研究生通讯作者：王进(1978-)，男，博士，副教授

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