HU Yihua, LIU Ming, HUANG Zhichao, et al. Methods of im proving the fatigue life of housing welded joint of middle-sized drive axle[J]. 2020,50(8):106-109.
HU Yihua, LIU Ming, HUANG Zhichao, et al. Methods of im proving the fatigue life of housing welded joint of middle-sized drive axle[J]. 2020,50(8):106-109. DOI: 10.7512/j.issn.1001-2303.2020.08.22.
In order to solve the housing fatigue fracture problem in a middle-sized drive axle under vertical bending loading condition,this paper analyzes the characteristics and causes of the Y-shaped joint fatigue fracture of the housing assembly bearing the vertical bending alternating load. Three methods are proposed to improve the fatigue life of housing welding:(1)change the design scheme,move the triangular plate weld inward by 12.5 mm;(2) groove the weld joint;(3)adopt the new constant penetration MAG welding process to weld the Y-shaped joint. The above three methods ensure the weld penetration to avoid the generation of Y-shaped joint fatigue crack of housing assembly and improve its fatigue life.