统计数据表明,挖掘机结构件质量问题在故障中占有一定比例,因此挖掘机结构件的质量影响整机质量。结构件的质量首先取决于其设计方案,其次取决于制造工艺。本文通过对挖掘机工作装置轴套、回转支承座、固定支架等3个关键部位结构件制造工艺的改进,说明工艺人员应在审核结构设计方案及制造工艺时,提出改进方法。1.轴套的改进(1)原结构及缺点某挖掘机动臂、斗杆、铲斗轴套原结构如图1a所示。2个轴套在其座孔内的轴向定位采用1根钢管,由该钢管顶 Statistics show that excavator structural quality problems account for a certain percentage of the failure, so the quality of excavator structural parts affect the overall quality. The quality of a structural part depends firstly on its design and secondly on the manufacturing process. This article improves the manufacturing process of the structural parts of the three key parts such as the bush of the excavator working device, the slewing bearing, the fixing bracket and so on, which shows that the technician should propose the improvement method when examining the structural design and manufacturing process. 1. Improve the sleeve (1) the original structure and shortcomings An excavator boom, stick, bucket sleeve original structure shown in Figure 1a. Axial positioning of the two bushings in their seat bore uses a steel pipe from which the top is