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An Influence of Tool Profiles on the V-bending Process of Sheet Metal

机译：刀具轮廓对钣金V型弯曲过程的影响

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摘要

An incremental elastic-plastic finite-element computer code, based on an updated Lagrangian formulation, was developed to simulate the V-die bending of sheet metal. In particular, the degenerated shell element was used to formulate the stiffness matrix. The r-minimum method was used to treat the elastic-plastic state and solve contact problems at the tool-metal interface. A series of experiments were performed to validate the theoretical formulation, supporting the development of the computer codes. Simulation results, such as the camber height associated with bending and the bending angle of the bent part after unloading were compared with experimental data, and the results were consistent. The simulation including the springback behavior was performed to evaluate the effects of the tool profiles such as punch radius (Rp), die radius (Rd) and angle of tool (At).
机译：基于更新的拉格朗日公式，开发了增量弹塑性有限元计算机代码，以模拟钣金的V型模头弯曲。特别是，退化的壳单元被用来公式化刚度矩阵。 r-最小方法用于处理弹塑性状态并解决工具-金属界面的接触问题。进行了一系列实验以验证理论公式，支持计算机代码的开发。将与弯曲相关的外倾高度和卸载后弯曲部件的弯曲角度等仿真结果与实验数据进行了比较，结果是一致的。执行包括回弹行为的模拟以评估工具轮廓的影响，例如冲头半径（Rp），模具半径（Rd）和工具角度（At）。

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