基于AUTOFORM模拟的顶盖前边梁加强板热冲压工艺

目的 研究顶盖前边梁加强板热冲压成形过程中不同参数对零件成形的影响规律,为生产提供技术指导。方法 通过AUTOFORM模拟零件热成形过程,并对模拟结果对比分析,得到了板料尺寸、成形温度、保压时间、成形压力、冷却时间等工艺参数对成形性能的影响。结果 优化了板料尺寸及板料定位,并通过调节模具间隙保证了零件的成形性,得到零件最大减薄率小于15%,平均抗拉强度达到1450 MPa,平均硬度达到HV475,从而确定了顶盖前边梁加强板的热冲压工艺。结论 结合此有限元分析方法试制出抗拉强度大于1450 MPa的合格零件,为此类零件批量化生产提供理论依据。

Hot Stamping Process for the Front Side Beam Strengthening Plate of the Roof Based on AUTOFORM

The paper aims to study the influence of different parameters in the hot stamping forming process of the front side beam strengthening plate of the roof to provide technical guidance for production. The hot forming process of parts was simulated through AUTOFORM. The influence of process parameters such as blank size, forming temperature, holding time, forming pressure and cooling time during the hot forming process were obtained by comparing and analyzing the simulation results. The blank metal size and blank positioning were optimized, and the formability of the parts was ensured by adjusting the die gap. The largest thinning ratio of the parts was less than 15%; the average tensile strength reached 1450 MPa; and the average hardness reaches HV475, thus determining the hot stamping process of the front side beam strengthening plate of the roof. Qualified parts with tensile strength greater than 1450 MPa are produced on the basis of this finite element analysis method, providing a theoretical basis for the mass production of such parts.