The following factors should be considered when selecting cemented carbide bit:
1. Machining accuracy
When selecting cemented carbide bit, the dimensional accuracy of drilling must be considered first. Generally speaking, the smaller the hole diameter to be machined, the smaller the tolerance. Therefore, bit manufacturers usually classify bits according to the nominal diameter to be processed.
2. Processing stability
In addition to the machining accuracy, the stability of the machine tool should also be considered when selecting the drill bit. The stability of machine tool is very important for the safe service life and drilling accuracy of drill bit. The stability of the bit itself should also be considered. Cemented carbide bit has good rigidity, so it can achieve high machining accuracy.
3. Processing cost per hole
Productivity or processing cost per hole is an important factor affecting drilling processing. In order to improve productivity, bit manufacturers are committed to the research of machining methods that can integrate multiple operation processes, and the development of drilling tools that can realize high feed and high speed machining.
4. Chip removal and coolant
Chip removal is an important problem in drilling. In fact, a lot of problems encountered in drilling process is that chip removal is not smooth, and no matter what kind of bit is used, this problem can not be avoided. The external injection of coolant is often used to assist chip removal in the machining workshop, but this method is effective only when the depth of the machined hole is less than the diameter and the cutting parameters are reduced. In addition, suitable coolant type, flow rate and pressure must be selected to match the bit diameter.
