在塔式起重机钢结构生产中,多采用圆管与圆管焊接。圆管与圆管的交线是相贯线,如图1所示。相贯线的加工质量,直接影响到塔机标准节的截面尺寸及焊接质量。经实践,我们将普通车床作些小改造,既可提高加工质量,使其达到设计要求,又能提高工作效率,如图2所示。 In the tower crane steel production, the use of more pipe and pipe welding. The intersection of circular pipe and circular pipe is the intersecting line, as shown in Fig.1. The processing quality of the intersecting line has a direct impact on the cross-section size and welding quality of the tower crane standard section. After practice, we will make some minor modifications of the ordinary lathe, both to improve the quality of processing, to meet the design requirements, but also improve work efficiency, as shown in Figure 2.