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SD7型推土机铲刀提升缸的活塞杆钢材牌号为45Mn,耳环钢材牌号为42CrMo。其活塞杆与耳环采用焊接结构,但用户反馈,该型推土机铲刀提升缸活塞杆与耳环焊接处易于出现断裂,为此我们对焊接处断裂的原因进行分析,并提出了改进方法,现介绍如下。1.断裂原因原活塞杆与耳环采用对接结构,活塞杆及耳环的焊接处开有V形坡口,坡口深度为8mm,坡口结构如图1所示。采用
SD7-type bulldozer blade lift cylinder piston rod steel grade 45Mn, earrings steel grade 42CrMo. The piston rod and earrings using welding structure, but the user feedback, this type of bulldozer blade lift cylinder piston rod and earrings prone to fracture, we have to weld the cause of the fracture analysis and proposed improvements, are introduced as follows. 1. Fracture original piston rod and earrings docking structure, the piston rod and earrings welded V-shaped groove opened, the groove depth of 8mm, bevel structure shown in Figure 1. use