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容器上的椭圆形封头经压制后,进行端口余量切割,切割时一般是放在平台上,按其高度划出要切割线,然后用手工切割封头余量。采用这种方法切割,劳动强度大,切割质量差,割纹呈锯齿形(其峰谷间距2～3毫米左右)。为此,我们自制了一台如图所示的转盘。此转盘结构简单,制作容易,使用方便,切割质量好。还能按要求切割出坡口。工作过程如下:切割前只要在转盘上点焊一个筒节,把椭圆封头吊置在筒节上,并校对其同心度。然后把割枪的割嘴对准封头。
The oval head on the container is pressed, the port margin cutting, cutting is generally on the platform, according to its height to be cut line, and then manually cut the head margin. Using this method of cutting, labor-intensive, poor cutting quality, cut-zigzag (the peak spacing of about 2 to 3 mm). To this end, we made a self-made turntable as shown. This turntable has the advantages of simple structure, easy manufacture, convenient use and good cutting quality. Can also be cut out of the groove. Work process is as follows: Just before cutting the spot welding a tube on the turntable, the elliptical head hanging on the tube section, and proofreading its concentricity. Then aim the cutting torch’s tip at the head.