枪钻采用外排屑方法,适用于钻削孔径φ30mm 以下的深孔。冷却液从钻杆内孔注入切削区,其切屑从钻杆上的 V 形排屑槽排出。由于钻杆的圆周部份与己加工的孔壁之间的间隙容易卡住细小的切屑,所以用枪钻钻削深孔时,要求切屑具有一定的长度(一般为30～60 mm)并卷成螺旋状,以保证加工质量和生产效率。实践表明,除了切削用量 Guns used outside the chip removal method, suitable for drilling hole φ30mm below the hole. Coolant is injected into the cutting zone from the bore of the drill pipe and the chips are discharged from the V-shaped flutes on the drill pipe. Drilling a deep hole with a gun requires a certain length (usually 30 to 60 mm) of the chip and a roll of the chip, since the clearance between the circumferential portion of the drill pipe and the machined hole wall tends to catch fine chips Into a spiral, in order to ensure processing quality and production efficiency. Practice shows that, in addition to cutting the amount