Do you know how to use carbide drills properly?

1.Cemented carbide drill should choose the right machine

Carbide drills can be applied to CNC machine tools, machining centers, and other high-power, rigid steel machines, and the tool tip should ensure TIR <0.02 And the radial drilling machine, universal milling machine and other machine tools due to low power, poor spindle accuracy, easy to cause early chipping of the carbide drill, should be avoided as much as possible.

2.Cemented carbide drills should choose the correct shank

Spring chucks, side-press chucks, hydraulic shanks, hot shanks, etc. can be used, but because the clamping force of the quick-change drill chuck is not easy enough to cause the drill to slip and fail, it should be avoided.

3. Correct cooling

(1) For external cooling, attention should be paid to the combination of cooling directions to form an up-and-down step arrangement, and the angle with the tool should be minimized as much as possible.

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

4. Correct drilling process

(1) Do not drill when the inclination angle of the drilling surface is> 8-10 °. <8-10 °, the feed should be reduced to the normal 1 / 2-1 / 3;

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

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

(4) The 2-blade drill must not be reamed.