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覆盖件拉延成形模具一般要用大型专用仿形机床来加工制作,周期长,工艺复杂,中小厂难以生产,大型厂亦不易进行产品的更新换代。锌基合金具有优良的铸造工艺性能,易于制出型面复杂,表面光洁的模具,使用寿命亦可达万件,是快速制模有效途径之一。与低熔点合金(铋锡合金)相比,锌合金价格低,来源广泛;与铸铁相比,则熔点要低的多,工艺上易于控制,加工简单易行。作者与湖北大沙湖汽车配件厂合作,于1984年底制成总重达11吨,锌合金凸凹模各
Cover drawing dies generally use large special copy machine to machine production, long cycle, complex technology, difficult to produce small factories, large factories are not easy to replace the product. Zinc-based alloy with excellent casting process performance, easy to produce a complex surface, the surface smooth mold, the service life of up to 10,000, is an effective way to quickly mold. Compared with the low melting point alloy (bismuth-tin alloy), the zinc alloy is low in price and has a wide range of sources. Compared with cast iron, the melting point is much lower, the process is easy to control, and the processing is simple and easy. Authors and Hubei Dasha Lake Auto Parts Factory cooperation, at the end of 1984 made a total weight of 11 tons, zinc alloy punch