35 MN液压机缸体裂纹检验分析  

Inspection and analysis of cracks on 35 MN hydraulic press cylinder

作　　者：刘晓磊 时飞扬 陈昌华 闵明 胡家豪 LIU Xiaolei;SHI Feiyang;CHEN Changhua;MIN Ming;HU Jiahao(Technology Center,Nanjing Develop Advanced Manufacturing Co.,Ltd.,Nanjing 210048,China;School of Metallurgy Engineering,Anhui University of Technology,Ma'anshan 243002,China)

机构地区：[1]南京迪威尔高端制造股份有限公司技术中心,江苏南京210048 [2]安徽工业大学冶金工程学院,安徽马鞍山243002

出　　处：《物理测试》2022年第6期51-56,共6页Physics Examination and Testing

摘　　要：35 MN液压机主缸正常作业时,缸体下部发生大量漏油现象。拆卸后通过宏观分析、磁粉检测、低倍检验、力学性能检验以及金相检验等方法对缸体周向裂纹产生原因进行分析。结果表明:裂纹源于缸体外圆R角处,由外壁向内壁扩展,缸体过渡圆弧处表面加工刀痕和力学性能远低于技术要求导致周向裂纹的产生并造成漏油现象发生。During the normal operation of 35 MN hydraulic press, a large amount of oil leakage occurred at the lower part of the main cylinder. After disassembly, the causes of circumferential cracks in the cylinder block were analyzed by means of macroscopic examination, magnetic particle testing, macroscopic examination, mechanical property inspection and metallographic inspection. The results showed that the crack originated from the R angle of the outer circle of the cylinder and then extended from the outer wall to the inner wall. The surface machining knife mark and mechanical properties at the excessive arc of the cylinder were much lower than the technical requirements, which caused circumferential cracks and oil leakage.

关 键 词：液压机主缸 周向裂纹 超声检测 磁粉检测 表面加工刀痕 

分 类 号：TH137[机械工程—机械制造及自动化]