巧校铜管河南省正阳县国营六九三厂董学仁一根1m左右长的铜管,内径为6mm,外径8mm。当铜管弯曲时,必须校直后才能在车床上装夹,加工成需用的零件。在校直时,无论怎样小心地轻轻敲打都会使铜管变扁而使材料报废。校直的方法是:用一根6mm直径的圆钢,长度约长于铜管50mm,圆钢两端在砂轮上大致磨成球状,将圆钢穿入钢管内,边穿边在垫有10mm厚 Qiao school brass Zhengyang County, Henan Province, State-run six nine three Factory Dong Xueren a long copper pipe about 1m, an inner diameter of 6mm, an outer diameter of 8mm. When the copper tube is bent, it must be straightened to be able to be clamped in the lathe and processed into the required parts. When straightening, no matter how carefully carefully tap the brass will be flattened and the material scrapped. Alignment method is: use a 6mm diameter round bar, the length is about longer than the copper tube 50mm, both ends of the round bar on the grinding wheel roughly ground into a ball, the bar into the steel pipe, while wearing the pad 10mm thick