由于生产批量逐年增大,我厂于1964年开始采用硬质合金材料制造硅钢片冲模。十几年来共制造了65付复合模和38付级进模。刃磨寿命最高达到60万片(“E”形硅钢片的复合模)和120万片(同前的级进模),但还不稳定,影响寿命的原因也未作认真试验分析。1977年一机部下达“一百项基础件攻关”任务,桂林电器所,上海材料所、上海开关厂和我厂等单位共同承担硬质合金的硅钢片冲模使用总寿命达到一亿次水 As the production volume increases year by year, I plant in 1964 began to use carbide materials for silicon steel die. Over the past few years, a total of 65 paid composite molds and 38 paid progressive molds. Sharpening life of up to 600,000 (“E” -shaped silicon steel composite model) and 1200000 (with the previous progressive die), but not stable, affect the life of the reason did not make serious test analysis. In 1977, a unit issued a “one hundred basic pieces of research” mission, Guilin Electric Appliance, Shanghai Materials, Shanghai Switch Factory and I plant and other units to bear the common use of hard alloy silicon steel die with a total life of 100 million times the water