在500马力的水管锅炉中,有很多长短及弯曲要求不一样的水管。由于水管在弯曲后误差较大,所以在下料中总是要多放一点余量。一般说来两端都要锯去1～2”。因为弯管的弯曲度较大,不可能在车床上切割,所以通常都是采用手工切割;但是,手工切割生产率太低。在这种情况下,仇炎康同志利用旧车床床头、三爪卡盘和钻床工作台,装成一个割管工具。三爪卡盘的一个卡爪开有方孔,用来装夹割刀。卡盘的方孔上焊一根圆棒;棒上装六角撞块;同时在工作台上装一个固定撞头。工件装在虎钳上。当三爪卡盘旋 In a 500-horsepower water-tube boiler, there are many plumbing pipes that require different lengths and bends. As the water pipe bending error is larger, so always put more in the next feed a little margin. Generally speaking, both ends should be sawed 1 ~ 2 .Because the curved pipe bending is too large, it is impossible to cut in the lathe, so the manual cutting is usually used; however, the manual cutting productivity is too low. In the next, Comrade Qiu Yankang used the old lathe bed, three jaw chuck and drill table, installed into a cutting tool .A jaw claw claw opened with square hole, used to hold the knife. Hole on the welding of a round bar; rod mounted hexagonal block; at the same time on the table mounted a fixed head. The workpiece mounted on the vise. When the three claw card circling