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硬质合金枪钻是近代发展起来,并得到广泛采用的一种效率高,加工质量好的先进深孔加工刀具。它不仅适用于小深孔的加工,而且扩展到(?)孔,如油泵精密偶件,液压阀体,阀套等的孔加工,并取代了钻-扩-铰加工工艺。一、枪钻的结构特点和几何参数枪钻的结构见图1.它由钻头、钻杆、钻柄三部分构成。硬质合金钻头和钻柄分别钎焊于带有V形排屑槽的异形管状的钻杆两端,经过仔细过滤的高压切削油通过中空的钻杆,从钻头的油孔喷出,直接到达切削区,有效地起到冷却润滑
Carbide gun drilling is developed in modern times, and has been widely used in a high efficiency, good processing quality of advanced deep-hole processing tools. It not only applies to the processing of small deep holes, but also to (?) Hole, such as the precision parts of the oil pump, hydraulic valve body, valve sleeve and other hole processing, and replace the drill - expansion - hinge processing technology. First, the structural characteristics of gun drill and geometric parameters Gun drill structure shown in Figure 1. It consists of drill, drill pipe, drill shank three parts. Carbide drill bits and drill shank brazed separately with a V-shaped flute at both ends of the shaped tubular drill pipe, carefully filtered high-pressure cutting oil through the hollow drill pipe, the drill hole from the oil directly to Cutting area, effectively play a cooling lubrication