近年来,我厂与国外合作制造水轮机蜗壳和尾水管等结构件,这些部件均由数节壳体组焊而成,每节展开下料的轨迹均是不规则缓曲线。由于设计要求的尺寸及对接组焊缝质量要求较高,要求首道工序切割的尺寸精度和坡口质量也较高。在厂内无数控切割机的情况下,我们采用了一种简易方法,具体介绍如下: 先按下料的样板或直接在钢板上放样划出切割线,然后按此线在钢板上划出两条与此线平行的轨道线,在每条轨道线两侧按一定间距吸上千分表的磁性底座。然后用厚1mm、高 In recent years, our factory cooperates with foreign countries to manufacture the structural parts of turbine volute and draft tube. These components are all welded together by several sections of shell, and the trajectories of unwinding each section are irregular slow curves. Due to the size of the design requirements and weld quality requirements of the butt joint group, the requirements of the first process of cutting the dimensional accuracy and groove quality is also higher. In the factory without CNC cutting machine, we used a simple method, as follows: First press the sample or cut out directly on the steel sheet set out to cut the line, and then press this line in the steel two Article line with this line parallel to the track line in each track line by a certain distance on both sides of the magnetic base on the dial indicator. Then thick 1mm, high