介绍了汽车车身覆盖件的拉延工艺特点和内容，以及在三维CAD环境下汽车覆盖件的拉延工艺设计制造流程。
In this paper, the characteristics and content of drawing technology and its process flow under three-dimension CAD conditions are presented.
为了快速、准确地制造汽车车身覆盖件，对大型汽车覆盖件材料的屈服极限、强化模式以及失效模式进行了分析。
To make automobile panel rapidly and accurately, the yield limit, hardening modes and invalidation modes of materials for large automobile panels were analyzed.
介绍了我国汽车车身覆盖件冲压生产工艺的现状和发展趋势，总结了各类冲压生产线的特点和选择生产线的方法；
The actuality and development of automotive cover panel punching process are introduced and the characters and selection method of punching production lines was summarized.
汽车覆盖件作为汽车车身的主要零件，其质量对整车的性能及外形美观至关重要，质量要求高。
As an important part of the auto-body, automobile panel, decides the automobile performance and the appearance quality, therefore enjoys high demands for its quality.
汽车覆盖件是汽车车身的主要零件，覆盖件冲压工艺水平与产品质量的高低在汽车制造中具有举足轻重的地位。
The car body panel is one of the most important parts in car body, the level of press for car body panel and the quality of panel are very important in the car industry.
该方法简便，与实际接近，适用于汽车车身大型覆盖件回弹的计算。
In is concluded that this calculation method is simple and convenient, closed to the actualities and suitable for calculating the resilient deformation in large-sized covering stampings.
该方法简便，与实际接近，适用于汽车车身大型覆盖件回弹的计算。
In is concluded that this calculation method is simple and convenient, closed to the actualities and suitable for calculating the resilient deformation in large-sized covering stampings.
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