圆集箱是锅炉水冷套上一个零件,结构如图1所示。30—φ25mm孔表面粗糙度为R_α12.5,必须通过机加工才能达到。使用镗床或者钻床必须将圆集箱倾斜一个α角,(α有30°和45°两种),由于圆集箱尺寸大,重量为115kg,钻孔时,钻削力大,必须使用夹具固定,而且夹具要有足够稳定性,以避免倾覆和发生事故。夹其原理及结构如图2所示。 Round header is a water-cooled boiler set a part, the structure shown in Figure 1. 30-φ25mm hole surface roughness R_α12.5, must be achieved by machining. The use of a boring machine or a drilling machine must be tilted by an angle α (α is 30 ° and 45 °). Due to the large size of the round header, the weight is 115 kg. When drilling, the drilling force is large and must be fixed with a clamp , And the fixture must be stable enough to avoid capsizing and accidents. Clamp the principle and structure shown in Figure 2.