论文部分内容阅读
1.焊缝开裂原因推土机铲刀两侧推杆承受较大的冲击载荷。推杆接头内焊接有球座,若接头与球座的焊接质量不佳,推土机推土作业产生的推力,极易造成接头与球座焊缝的开裂,如图1所示。分析认为,推杆接头开裂的原因有下4点:一是焊接坡口小。只在推杆接头的内孔处铸造20°坡口,球座处没有坡口,焊接时焊材与球座不能充分融合,焊接后强度达不到要求。
1. Cause of weld cracking Dozer bulldozers push rod on both sides to bear a greater impact load. In the push rod joint, a ball seat is welded. If the welding quality of the joint and the ball seat is poor, the pushing force generated by bulldozing machine bulldozing can easily cause cracking of the joint and the ball seat weld, as shown in FIG. 1. Analysis, the reasons for the split rod joints have the next 4 points: First, the welding groove is small. Only 20 ° bevel hole is cast at the inner hole of the push rod connector, there is no bevel at the ball seat, and the welding material can not be fully fused with the ball seat during welding, and the strength after welding can not meet the requirements.