方形和长方形盒子的拉深是一种复杂而且研究得较少的冷冲压过程。特别是,关于拉深只发生于盒子的四角,而直壁是压弯的简单化的概念是极为通行的。在实际上,从[图一]看来,侧壁不单是压弯,而遭受比较复杂难的变形——沿周边的部份压缩(缩短),而在垂直方向上伸长并且在盒子上部的材料厚度有些增加。 The drawing of square and rectangular boxes is a complex and less well-researched cold-stamping process. In particular, the concept of simplification of the straight wall as the bending of the box only occurs at the four corners of the box. In fact, it appears from [Figure 1] that the side walls not only buckle but suffer more complicated deformations - partial compression (shortening) along the periphery and elongation in the vertical direction and at the top of the box Some increase in material thickness.