纵弧棱U型梁的冲压变形行为分析

针对高强钢纵弧棱U型梁类件的冲压成形问题,分析了纵弧棱U型梁成形件各个区域的冲压变形特点,再通过有限元分析总结了其成形过程的应力、应变分布情况和厚度变化规律,并结合模拟结果与物理试验探讨了该类零件在成形过程的减薄和增厚行为。验证结果表明:该梁类件的主要变形区为翼板区,且厚度从端部至中部逐渐减小;主要危险部位处于中部侧壁上与顶部圆角的连接处,最小厚度为0.833 mm,为制件质量的主要评估处,该处应变变化较大,其中厚度最大减薄量接近0.20 mm,易导致梁失效。研究结果对该类梁的成形工艺和模具设计具有参考价值。

Analysis on stamping deformation behavior for U-shaped beam with longitudinal arc edge

For the stamping problem of U-shaped beam parts with longitudinal arc edges of high strength steel, the stamping deformation characteristics of each area for the U-shaped beam forming part with longitudinal arc edge were analyzed. Then, the stress and strain distributions and the thickness change laws of the forming process were analyzed by finite element, and its thinning and thickening behaviors in the forming process were explored by combining the simulation results and physical experiments. The verification results show that the main deformation area of the beam is the wing plate area, and the thickness gradually decreases from the end to the middle. The main dangerous area was at the junction of middle side wall and fillet at the top with the minimum thickness of 0.833 mm, which is the main assessment position for the quality of parts. In addition, the strain at this place changes greatly, and the maximum reduction amount of thickness is close to 0.20 mm, which is easy to cause failure of the beam. Thus, the research results have reference value for the forming process and die design for this type of beam.