作　　者： ; ;

机构地区： 华南理工大学机械与汽车工程学院

出　　处： 《华南理工大学学报（自然科学版）》 2006年第7期35-39,共5页

摘　　要： 基于数值模拟技术,采用动态显式有限元分析软件eta/DYNAFORM,对汽车发动机罩外板的成形过程进行研究,通过建立2组共8种冲压仿真模型,针对方板及剪角板板材模型,分析了板材形状、工艺补充尺寸对发动机罩外板成形的影响,确定了合理的板材尺寸,并得出以下结论:板材形状和尺寸对发动机罩外板的成形有显著影响;当板材形状不合适时,在一定范围内调整尺寸可改善成形结果,但不能解决根本问题;剪角板更适合轿车发动机罩外板的成形,若采用方板则需要较大的板材;采用75°剪角板可获得较好的成形结果. The formation process of automobile engine hood panels is investigated by means of the numerical simulation using a dynamic explicit FEA （ Finite Element Analysis） software eta/DYNAFORM. Eight simulated stamping models in two groups are then established to analyze the influences of the initial blank shape and the technological supplementing dimension on the formation of the engine hood panel, each using the rectangular blank model and the cutting-angle blank model. Proper blank dimension is thus obtained. The results show that the formation is greatly affected by the shape and dimension of the blank, that adjusting the dimension in a certain range can improve the stamping formation if the blank shape is unmeet, but can not solve the problem thoroughly, and that the cutting-angle blank, especially the one with an angle of 75 °, is more suitable for the formation than the square blank because the latter may cause large size consumption.

关 键 词： 轿车发动机罩外板 冲压 成形 毛坯尺寸 数值模拟

领　　域： [金属学及工艺]