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An investigation of mandrel-free spinning

机译：无心性纺丝的调查

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Spinning is a sheet metal forming technique conventionally used to form axisymmetric shapes. Recently a flexible mandrel-free spinning process was successfully used to form non-axisymmetric geometries. In this mandrel-free spinning process, numerically controlled rollers are used instead of a mandrel, allowing for savings in the lead-time, cost and the material required for mandrel. The deformation behavior of this process has not been previously analyzed numerically, although it is critical to designing toolpaths and achieving successful parts. In this work, an FEA model is constructed and is used to study the stress distribution and the strain path. Validation of the numerical model is carried out by comparing forces with measureable experimental results. The model shows that the stress distribution while forming is different to that observed in the conventional spinning while the wrinkling mechanism is similar to that observed in conventional spinning.
机译：纺丝是一种常规用于形成轴对称形状的金属板形成技术。最近，可以成功地使用柔性心轴纺丝过程来形成非轴对称几何形状。在这种无轴的纺纱工艺中，使用数值控制的辊代替心轴，允许节省在延长时间，成本和心轴所需的材料中。此过程的变形行为尚未在数值上进行分析，尽管对设计刀具路径并实现成功部件至关重要。在这项工作中，构造了FEA模型，用于研究应力分布和应变路径。通过比较具有可测量实验结果的力来进行数值模型的验证。该模型表明，在形成的同时形成的应力分布与在常规旋转中观察到的同时，皱纹机构类似于在常规旋转中观察到的。

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