1.  Carbide drill bit should choose the correct machine tool

The cemented carbide drill is applied to the machine, the machining center is equivalent, the steel is good machine, and should ensure the tool tip beat Tir <0.02. The rocker drill, universal milling and other machine tools are smaller, the spindle precision is poor, and the early collapse of the hard carbide drill bit should be avoided.

2,  Carbide drill bit should choose the correct cutting handle

Spring collet, side pressure cutter, hydraulic tool holder, heat rising knife handle, etc., but because the quick-changing drill collet clamping is not easy to cause the drill bit to slip, it should be eliminated.

3, correct cooling

(1) The outer cooling should pay attention to the direction in which the cooling direction is formed, and the upper and lower ladder are arranged, and the angle between the tool is as low as possible.

(2) The internal cooling drill should pay attention to the pressure and flow, and should prevent the coolant leakage affect the cooling effect.

4, the correct drilling process

(1) When entering the diamond surface, the angle of inclination is> 8-10 °, it is not drilled. <8-10 °, feed should be reduced to normal 1/2-1 / 3;

(2) When the drilling surface is inclined> 5 °, the feed should be reduced to normal 1/2-1 / 3;

(3) When a diamond hole (orthogonal holes or oblique holes), the feed should be reduced to normal 1/2-1 / 3;

(4) 2 blade drill should not be expanded.