前言 本文是我厂反向冷挤压硬质合金凹模十八年来生产实践经验总结。通过对该工具断裂失效的分析,就其“失效”的原因进行了探讨,着重阐明单位挤压力、硬质合金材质以及机械加工与凹模横向断裂的关系。提出设计较合理的加工率,硬质合金材质的技术要求及机械加工中应注意的事项,达到延缓断裂产生的时间提高模具寿命的目的。 Preface This article is my factory reverse cold extrusion carbide die 18 years of production practice summary. Through the analysis of the failure of the tool, the reason of “failure” was discussed, and the relationship between unit extrusion force, carbide material, mechanical processing and transverse fracture of the die was emphasized. The reasonable design of the processing rate, the technical requirements of carbide materials and mechanical processing should be noted Matters to achieve the purpose of delaying the time of fracture to improve die life.