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普通冲裁所能得到的工件,尺寸精度和光洁度较低,断面又带斜度。为达到更高的要求,国外已广泛采用精冲和半精冲技术。在国内,因受冲压机床的局限,应用还不普遍。不少工厂已偿试在普通冲床上进行简易精冲,其形式按压边力的来源区分,大致有下列几种: 1.带有液压装置的精冲模具(或模架)。 2.在常规模具上安装聚氨脂橡胶或强力弹簧,由预压的弹性体产生齿圈压力。显然,前者使用起来比较麻烦,且需添加辅助设备;后者消耗的功率大,仍不能产
Ordinary blanking can get the workpiece, the lower the dimensional accuracy and finish, the section with a gradient. To meet the higher requirements, foreign countries have been widely used fine blanking and semi-precision technology. In China, due to the limitations of stamping machine tools, the application is not common. Many factories have been tried on simple punch on the fine fine blanking, the form of press edge force of the distinction, there are roughly the following: 1. With a hydraulic punching die (or mold). 2. In the conventional mold to install polyurethane rubber or strong spring, pre-pressed elastomer ring gear pressure. Obviously, the former is rather troublesome to use and needs to be supplemented with auxiliary equipment; the latter consumes a large amount of power and still can not produce