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铝屑冲击破碎机甩刀是德国产铝屑破碎机的易损件,其在使用过程中易发生颈部断裂。为了实现该刀的国产化,降低生产制造成本,采用了42CrMo材料制造甩刀,以替代进口。在研制过程中,甩刀也出现了颈部断裂现象。对此,分析了热处理后甩刀的金相组织及力学性能,并对其受力情况进行了有限元计算,深入考察所采用的热处理工艺及安装工艺,总结刀具颈部断裂的原因,并提出有效的改进方案。
Crushed aluminum shredder rejection knife is a German-made aluminum crusher wearing parts, its easy to occur in the process of neck fracture. In order to achieve the localization of the knife, reduce manufacturing costs, the use of 42CrMo material made rejection knife, instead of imports. In the development process, rejection knife also appeared in the neck fracture phenomenon. In this regard, the metallographic structure and mechanical properties of the rejection knife after heat treatment were analyzed, and the finite element calculation of the stress was carried out. The heat treatment process and installation process were discussed in depth, and the reasons for the fracture of the cutter neck were summarized. Effective improvement program.