Springback Compensation by Superposition of Stress in Air Bending
Springback Compensation by Superposition of Stress in Air Bending
复制标题
空气弯曲中应力叠加的回弹补偿
DOI：
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发表时间：
2009
期刊：
影响因子：
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通讯作者：
A. Tekkaya
中科院分区：
文献类型：
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作者：
A. Weinrich;N. Ben Khalifa;S. Chatti;U. Dirksen;A. Tekkaya
在钣金加工行业中，弯曲是常见的金属成形工艺之一。根据工艺状态，必须区分模具中的自由弯曲（空气弯曲）和压印（模具弯曲）。空气弯曲工艺由于其灵活性而成为目前应用最广泛的板料弯曲成形工艺之一，但回弹现象对工业应用仍是一大挑战。在德国多特蒙德工业大学的成形技术和轻型结构研究所（IUL），开发了一种新方法，可以补偿金属板空气弯曲中的回弹效应。该方法基于成形区应力的增量和局部叠加。叠加发生在弯曲操作之后，但在沿着金属板宽度卸载之前。这种新方法的优点是需要最小的力来补偿回弹。本文详细介绍了回弹补偿方法，并给出了第一个实验结果。
In the sheet metal processing industry bending is one of the common metal forming processes. Depending on the process state, a differentiation has to be made between free bending (air bending) in the die and coining (die bending). Because of its flexibility the air bending process is nowadays one of the widely applied processes for sheet metal bending, but the springback phenomenon is still a great challenge for the industrial application. At the Institute of Forming Technology and Lightweight Construction (IUL) of the Technische Universität Dortmund, Germany, a new method has been developed allowing the compensation of springback effects in air bending of sheet metals. This method is based on the incremental and local superposition of stresses in the forming zone. The superposition occurs after the bending operation but before unloading along the sheet metal width. The advantage of this new method is that a minimal force is required to compensate the springback. This paper describes the springback compensation method in detail and presents first experimental results.