根据现有资料,拉深带凸缘零件时,坯料的形状基本上是与零件的形状相似的。亦即旋转体零件的坯料是圆形的,非旋转体零件的坯料必须根据零件特征来具体确定。 直边坯料是指外形为方形、矩形或多边形等形状的坯料。在带凸缘零件的拉深中,也可用直边坯料来代替原来所需的曲线形坯料,这对于一些大型、厚料的带凸缘零件,可以达到提高经济效益的目的。 According to the available information, when the flanged part is drawn down, the shape of the blank is basically similar to the shape of the part. That is, the blank of the rotating body part is circular, and the blank of the non-rotating body part must be specifically determined according to the characteristics of the part. Straight edge blank refers to the shape of a square, rectangular or polygonal shape of the blank. In the flange with the parts of the drawing, you can also use the straight edge blank instead of the original curve blank, which for some large, thick material with flange parts, can achieve the purpose of improving economic efficiency.