A new concept, essential technical design(ETD) for automobile stretching part which provides succeeding FEM simulation with initial conditions, its necessity and characteristics are presented.

• 提出了要领设计的新概念， 即通过该环节为汽车覆盖拉延件成形的有限元模拟提供初始条件， 分析了要领设计的必要性和特点。