我厂制造自行車零件中的外鋼碗(图1)和內鋼碗(图2),在制造过程中要經过鍛制及冲压等工序。冲压时要应用許多模具,如外鋼碗要用一套落料模(图3)、一套成形模(图4)和一套冲孔模(图5),內鋼碗要用一套热冲模(图6)。这些模具在过去都要用合金工具鋼来制造,而且必須是高級优貭合金鋼(12或3 2 8),規格要求很严,似乎已經成为老規矩,不能改变的。在大跃进的形势下,合金工具鋼的应用范圍和需要量都越来越广,因此就不能墨守旧規,一成不变。我厂职工在党和領导的支持下,破除迷信,解放思想,工人与技术人員、車間管理員密切配合,試驗用低碳鋼代替合金工具鋼来制造冷热冲模。經过不断摸索后,終于試制成功,并得到上級 I plant manufacturing bicycle parts in the outer steel bowl (Figure 1) and the inner steel bowl (Figure 2), in the manufacturing process to go through forging and stamping processes. Stamping to the application of many molds, such as the outer steel bowl to use a blanking die (Figure 3), a set of forming die (Figure 4) and a punching die (Figure 5), the inner steel bowl to use a set of heat Die (Figure 6). These molds have historically been made of alloy tool steels and must be of premium grade alloy steel (12 or 388). The specifications are tight and seem to have become the norm and can not be changed. In the situation of the Great Leap Forward, the scope of application of alloy tool steel and the demand are more and more widely, so they can not stick to the old rules, immutable. With the support of the party and the leaders, our factory staff and workers got rid of superstition, emancipated their minds, worked closely with technicians and workshop managers, and experimented with using low-carbon steel instead of alloy tool steel to make hot and cold punches. After continuous exploration, finally trial success, and get superiors