我厂在制造各种非标准容器和钢结构的产品中,经常遇到各种不同直径的钢管和各类型钢的下料。长期以来,钢管断面的下料都是先在钢管上划出长短线,再用马口铁皮围在钢管的外周面上,用石笔划出断面线,各类型钢下料,都是用大小角尺反复划出多面线型,然后再用手工切割。这种下料方法,不但工作麻烦,而且耗费工时。在生产中,我 I plant in the manufacture of various non-standard containers and steel products, often encounter a variety of different diameters of steel and various types of steel cutting. For a long time, the steel pipe section of the material are first drawn on the length of the pipe, and then use the tin skin around the outer surface of the pipe, with a broken line drawn stone, all types of steel cutting, are repeated with the size of the square Draw polygons and then cut by hand. This cutting method, not only trouble, but also work hours. In production, I