New incremental methods for springback compensation by stress superposition
New incremental methods for springback compensation by stress superposition
复制标题
应力叠加补偿回弹的新增量方法
DOI：
10.1007/s11740-009-0151-7
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发表时间：
2009
期刊：
影响因子：
--
通讯作者：
U. Dirksen
中科院分区：
文献类型：
--
作者：
M. Kleiner;A. Tekkaya;S. Chatti;M. Hermes;A. Weinrich;N. Khalifa;U. Dirksen
在成形技术中，应力叠加原理是众所周知的控制成形区的影响。应力叠加的目的是达到材料的额外塑化，可用于补偿回弹效应，例如弯曲角度或弯曲半径，以延长材料的成形极限并降低成形力。本文讨论了作者基于应力叠加原理发明的两种新的成形工艺变体。第一种是空气弯曲过程，使用一个额外的辊，沿着弯曲金属板的拉伸区增加压应力的叠加。二是渐进式管材成形新工艺，适用于管材二维和三维任意形状的弯曲加工。它是基于纺丝工艺与自由成形管的结合。
In forming technology, the principle of stress superposition is well known for a controlled influencing of the forming zone. The aim of stress superposition is to reach an additional plastification of the material, which can be used to compensate the springback effect, e.g. of bending angles or bending radii, to extend the forming limits of the material and to reduce the forming forces. The paper deals with two new forming process variants invented by the authors, which are based on the principle of stress superposition. The first is an air bending process using an additional roll for the incremental superposition of compressive stresses along the tensile zone of a bent sheet metal. The second is the new process of incremental tube forming, which is suitable for bending tubes two- and three-dimensionally to arbitrary contours. It is based on the combination of a spinning process with the free forming of tubes.