How can carbide drills effectively extend service life?

During the production of cemented carbide drills, the main cutting edge of the drill will produce a lot of burrs. Such burrs are subtle. Under a hundred times the microscope, the cutting edge of the drill is jagged. If it is not removed, it will easily produce a jumping edge during drilling. The phenomenon of block dropping, after which the cutting edge begins to fall off, this notch will intensify wear during cutting, which will seriously shorten the service life of the tool. Now there is a perfect way to solve this problem, which is to passivate the drill. The passivation of the main cutting edge makes the cutting edge form a circular arc shape, reduces the cutting edge of the drill, and can improve the surface quality of the workpiece after drilling.

Passivation treatment is also called strengthening treatment. After this process, the carbide drill bit will form a very small R arc at the front edge of the carbide drill bit, disperse the cutting resistance, and eliminate some fines on the edge and ligament. Zigzag, which increases the rigidity of the cutting edge.