Grinding method of drill bit
When grinding the drill bit again, it is best to use the special machine tool for grinding the drill bit or the universal tool grinder, which is very important to ensure the service life and machining accuracy of the drill bit. If the original drilling pattern is in good condition, it can be reground according to the original drilling pattern; If the original drill is defective, the back shape can be appropriately improved and the cross edge can be polished according to the purpose of use.
The following points shall be noted during grinding:
1. Prevent overheating and reduce bit hardness.
2. All the damage on the drill bit (especially the damage on the edge of the blade belt) shall be removed.
3. The drill type shall be symmetrical.
4. Be careful not to damage the edge during grinding, and remove the burr after grinding.
5. For cemented carbide bits, the grinding shape has a great impact on the performance of the bit. The drill type at the factory is the best drill type obtained through scientific design and repeated tests. Therefore, the original blade type should be maintained during re grinding.
