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所谓聚氨酯橡胶精冲模,就是采用聚氨酯橡胶代替传统的精冲模上模腔中的油压顶件和部分或全部采用聚氨酯橡胶代替下模齿圈压板上的压料力的一种强力压板精密冲裁模。一、聚氨酯橡胶精冲模的应用我公司生产的长江-750摩托车发动机,其上的变速叉扇形板零件的形状尺寸如图1所示,材料为3.5毫米厚的冷轧10钢板。过去加工该零件的工艺方法是:采用普通冲裁法冲切(粗加工),然后进行机械加工精修齿型面,槽孔型面和叉杆孔,达到齿型的光洁度▽6,槽孔型面光洁度▽4,叉杆孔光洁度▽4及其尺寸精度φ12~(+0.035)毫米,再进行表面渗碳淬
The so-called polyurethane rubber fine die, that is, the use of polyurethane rubber instead of the traditional fine die cavity on the top of the oil pressure and some or all of the use of polyurethane rubber instead of under the die plate pressure force on a strong pressure plate precision blanking mold. First, the application of polyurethane rubber fine die I produced the Yangtze River -750 motorcycle engine, the shape of the speed shift fork fan parts shown in Figure 1, the material is 3.5 mm thick cold-rolled 10 steel. The past processing of the parts of the process are: using ordinary blanking punching (roughing), and then machining finishing tooth profile, slot profile and fork rod hole, to achieve the tooth-shaped finish ▽ 6, slot Surface finish ▽ 4, fork hole finish ▽ 4 and its size accuracy φ12 ~ (+0.035) mm, and then the surface carburized quenching