论文部分内容阅读
精密冲裁(简称精冲)是近年来国内外发展较快的一项先进冲压工艺。其特点是借助专用三动冲床(或经改装的单动冲床)及特殊结构的模具,使金属材料处于塑性条件较好的情况下进行冲裁。因而获得的零件质量较好。例如,对一个3毫米厚的碳钢零件,精冲后冲裁面光洁度达▽6～▽8,冲裁断而倾斜度在0.02毫米以下,內孔精度达GB3级,外形精度达GB4级,零件平直度达100:1。就适于精冲的材料来看,有各种碳素钢、合金钢、不锈钢、铜合金及铝合金等;就冲件尺寸范围看,国外最大件达几百毫米,最厚达20毫米。
Precision blanking (referred to as fine red) in recent years at home and abroad developed rapidly advanced stamping process. It is characterized by a special three-action punch (or modified single-action punch) and special structure of the mold, the metal material in plastic conditions better punching. The quality of the parts thus obtained is better. For example, for a 3 mm thick carbon steel parts, fine blanking blanking surface finish ▽ 6 ~ ▽ 8, blanking the broken and the inclination of 0.02 mm or less, bore accuracy of GB3 level, shape accuracy of GB4 level, parts Flatness of 100: 1. Suitable for fine blanking materials, there are a variety of carbon steel, alloy steel, stainless steel, copper alloy and aluminum alloy; on the punch size range, the largest foreign pieces of up to hundreds of millimeters, the thickest of 20 mm.