对生产中断裂破坏的剪床机身进行了测试分析,发现材料的化学成分、金相组织及力学性能不符合要求是导致床身断裂的根本原因。由此可以警示各类机床的设计生产单位,不应采用性能低于HT300铸铁的材料加工剪床机身,要提高质量意识,加强质保体系建设,行业也要加强必要的质量监管工作。在机床机身加工环节要特别注意铸造工艺的选择和严格控制工艺质量。 The failure of the production of shear-shear machine body was tested and found that the chemical composition of the material, microstructure and mechanical properties do not meet the requirements is the root cause of bed breakage. This can alert all types of machine tool design and production units should not be used less than HT300 cast iron material processing machine body, to raise awareness of quality, strengthen the quality assurance system, the industry should also strengthen the necessary quality control. In the machine tool processing links pay special attention to casting process selection and strict control of process quality.