锻压技术

大型单动机械压力机的挠度变形现象及行为特性

英文标题：Deflection deformation phenomenon and its behavior characteristics for large single-action mechanical press

作者：沈洪庆童亚平涂小文

单位：上汽大众汽车有限公司

关键词：挠度变形冲压模具压力机有限元法

分类号：TG385

出版年,卷(期):页码：2018,43(10):145-150

摘要：

针对大型单动机械压力机的挠度变形问题，建立压力机挠度变形试验，测量压力机台面及滑块在不同工作载荷下的挠度变形量。试验结果表明：大型单动机械压力机的挠度变形会对模具闭合状态造成明显的影响；压力机的挠度变形量与施加载荷呈线性增长关系；压力机的挠度变形具有明显的各向异性，台面长边方向的挠度变形量大于短边方向的挠度变形量。采用有限元法，对压力机挠度变形进行建模计算，结合试验数据，验证模拟计算精度，分析压力机工作台和滑块的变形特点。分析结果表明：由于结构上的差异，工作台和滑块的挠度变形分别呈“漏斗状”和“拱桥状”；工作载荷分布的集中度越高，压力机变形量越大，偏心载荷所引起的压力机挠度变形也是偏心的。研究成果为提高大型单动机械压力机的应用水平和冲压模具型面精益设计水平提供了理论基础。

For the problem of deflection deformation phenomenon for large singleaction mechanical press, a test of press deflection deformation was carried out, and the deflection deformation amounts of press bed and slider under various loadings were measured. The test results show that the deflection deformation of the large singleaction mechanical press has a great influence on the die closing status, and the press deflection deformation amount increases linearly with the applied loading. Furthermore, the press deflection deformation is anisotropic, and the deflection deformation amount along the length direction of bed is larger than that along the width direction. In the end, the press deflection deformation model was set up and calculated by the FEM, and the simulation accuracy was confirmed by the experiment data. Based on the simulation results, the deformation characteristics of press bed and slider were analyzed respectively. The analysis results show that the deflection deformation of press bed is funnelshaped, but the deflection deformation of slider is archshaped which is because of structural differences. The more concentrated the loading distribution is, the larger the press deflection deformation is. However, the press deflection deformation caused by the eccentric load is also eccentric. Thus, the research results improve the application of the large singleaction mechanical press and provide the theoretical foundation for the stamping die profile lean design.

基金项目：

沈洪庆（1982-），男，工学博士，工程师，E-mail：shenhongqing@csvw.com

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