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我厂为生产自行车链条的部件——链片,需要制造大量的模具。该模具的导向定位柱衬套(以上简称衬套),以往,一直以镁青铜制造,价格较贵重,一年仅磷青铜的材料费就需近万元。笔者分析了衬套的原理和作用,认真的研究了现有的若干种材料后,选择了一些价格便宜,易购买的材料,制造了几种不同材料的衬套,经对比试验,
I plant for the production of bicycle parts chain - pieces, need to create a large number of molds. The mold of the positioning of the positioning bushings (hereinafter referred to as bushings), in the past, has been made of magnesium bronze, the price is more expensive, only one year only phosphor bronze material costs nearly million. I analyzed the principle and function of the bushing, carefully studied several existing materials, selected a number of cheap, easy to buy materials, manufactured several different materials bushing, the comparative test,