论文部分内容阅读
我厂的锻件毛坯下料,采用棒料剪断机剪切,棒料直径范围为φ10～130mm,分圆钢和方钢两种。剪切模承受大的冲击和磨损作用,要求模具材料具有足够的强度和耐磨性及适当的韧性。剪切模镶块见图1。原用8Cr3或5CrNiMo钢制造,要求硬度HRC48～52。如镶块硬度在HRC48～52或HRC52以上时,使用过程中容易崩刃和断裂;若将硬度降至HRC48以下,则刃口容易磨损,甚至堆塌,需要重新修模,增加修磨及装卸辅助时间,降低生产率,增加成本。在一般情况下,8Cr3或5CrNiMo钢剪切模镶块刃磨一次的平均寿命约为1000件,总平均寿命约为30000件。
I plant forgings blank blanking, the use of bar cutting shears, bar diameter range of φ10 ~ 130mm, sub-round steel and square steel two. Shear mold to withstand the impact of large and wear, the mold material requires sufficient strength and wear resistance and appropriate toughness. Shear mold insert shown in Figure 1. Originally made of 8Cr3 or 5CrNiMo steel, the hardness of HRC48 ~ 52 is required. If the insert hardness is HRC48 ~ 52 or above HRC52, the process is easy to chipping and fracture; if the hardness down to below HRC48, then the edge of the wear and tear or even collapse, the need to re-repair, increase the grinding and handling Auxiliary time, reduce productivity and increase costs. Under normal circumstances, 8Cr3 or 5CrNiMo steel cutting inserts wear an average life expectancy of about 1000, with a total average life expectancy of about 30,000.