枪钻是深孔加工专用刀具中最古老的一种,是外排屑深孔钻的代表,也是小直径深孔加工的唯一方法。近几年来枪钻已用于浅孔加工,并已成为一种发展趋势。传统枪钻具有结构简单,刃磨方便等优点。但传统枪钻存在不易分屑、排屑困难、对机床精度、冷却液质量和压力要求较高等缺点,稍有不当,在加工过程中发生憋屑,甚至将钻头扭断。为此,我院研制了新型双刃枪钻(国家发明专利),该钻头采用两条不对称的排屑槽结构,钻尖偏离中心,无横刃。因此,它既具有单刃枪钻导向好,切削稳定的优点,又具有双刃枪钻切削力较平衡,钻削扭矩小及切削液流量大的优点,且分屑方便、可靠,排屑空间大,排 Gun drill is a deep hole machining tool for the oldest one is the representative of the deep hole outside the chip drilling, but also the only method of processing small diameter deep hole. In recent years gun drill has been used for shallow hole processing, and has become a trend. Traditional gun drill has the advantages of simple structure, easy grinding and so on. However, the traditional gun drill is not easy to debris, chip evacuation difficult, the accuracy of the machine, coolant quality and pressure requirements and other shortcomings, a little improper, in the process of holding chips, or even twist the drill. To this end, our hospital developed a new double-edged gun (national invention patent), the drill uses two asymmetric chip flute structure, the drill off-center, no chisel edge. Therefore, it not only has the advantages of single-edge guns, good cutting and stable cutting, but also has the advantages of more balanced cutting force, smaller drilling torque and larger cutting fluid flow, and has the advantages of convenient and reliable chip swarf Big row