论文部分内容阅读
在不变薄回转体拉深中,一般采用有压边圈凹模平端拉伸模(简称普通拉深模如图1)。对于变形程度较大的零件,采用多次拉伸的方法来完成。当回转体拉深件板厚T>2 mm时,采用无压边式圆锥形拉深模(简称圆锥形拉深模如图2),其极限变形程度较普通拉伸大的多。图3所示为汽车起动机开关壳,其料厚T=3 mm圆角R=2;要求底面平整且垂直壳壁。由于料厚、圆角小,我厂过去一直沿用老工艺进行5次拉深。凹模上口采用兄13～R9的入模圆角;凸模
In the thinning swivel deep drawing, the general use of the blank holder die flat end stretching die (referred to as ordinary drawing die in Figure 1). For the deformation of the larger parts, using multiple stretching method to complete. When the thickness of T-piece is T> 2 mm, a non-pressured conical die (referred to as conical die) is used, and its ultimate deformation is much larger than ordinary drawing. Figure 3 shows the starter motor switch shell, the material thickness T = 3 mm rounded R = 2; requires a flat bottom and vertical shell wall. Due to thick material, small fillet, I used to follow the old process in the past 5 times drawing. Dies mouth with brother 13 ~ R9 into the mold fillet; punch