35 MN液压机缸体裂纹检验分析

doi:10.13228/j.boyuan.issn10010777.20220004

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Abstract 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.

Key words： hydraulic press master cylinder circumferential crack ultrasonic inspection magnetic particle testing surface machining knife mark

Received: 07 February 2022

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	Articles by authors
	LIU Xiaolei
	SHI Feiyang
	CHEN Changhua
	MIN Ming
	HU Jiahao

Cite this article:

LIU Xiaolei,SHI Feiyang,CHEN Changhua等. Inspection and analysis of cracks on 35 MN hydraulic press cylinder[J]. PHYSICS EXAMINATION AND TESTING, 2022, 40(6): 51-.

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http://www.chinamet.cn/Jweb_wlcs/EN/10.13228/j.boyuan.issn10010777.20220004 OR http://www.chinamet.cn/Jweb_wlcs/EN/Y2022/V40/I6/51

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