several aspects of judging the quality of the drill

First, several aspects of judging the quality of the drill

1. see whether the quality of the cutting edge is good, the cutting edge should be smooth, sharp, clear cutting groove, no gap, lack of angle, etc..

2. Observe the shank and vibration test, qualified drills to have a stable bottom of the shank, the shank of the processing quality, precision and surface finish affect the service life of the tool and cutting effect.

3. Check the insert material and hardness, qualified drill material should have high hardness, strength and wear resistance, commonly used materials are high-speed steel, carbide and so on.

Second, to determine the cutting effect of several aspects of the drill bit

1. Decrease cutting force and reduce chips. A good drill can reduce the cutting force, thereby improving the surface quality of the workpiece and machining efficiency, but also reduce the production of chips, relatively reduce the occurrence of the phenomenon of card knife, improve processing safety. 

2. Whether the processing precision is high. The precision of drill processing, the precision of hole expansion affects the quality of the workpiece and the precision of assembly, when the tip of the tool is immersed in the material will produce bending deformation, if the initial precision of the drill is not high, to a certain extent, it will damage the surface of the workpiece, and cause the error of the hole, so high-quality drills should have a high degree of precision requirements.

3. Tool life. A good drill has a long service life, which improves productivity and reduces production costs.

Correct maintenance and use of drill bits

1. The drill bit should not touch hard objects or be subjected to excessive force when in use; it should choose the correct downward pressure and feed amount, and should not vibrate or shake excessively.

2. The correct size and depth of the hole should be reserved before drilling, and the thickness of the material should not exceed the drilling depth range of the drill.

3. The drill should be monitored at all times during the process of drilling, and the machine should be stopped in time to replace worn drill bits, so as not to make the drill wear more than the permissible range.

4. Drill bits should be properly maintained and serviced, regularly cleaned from chips and rust, oil extracted and soaked when necessary, and stored in such a way as to avoid mutual collision.

In short, the drill bit good or bad and cutting effect, life, tool quality and other factors, choose the right drill bit and the correct use, maintenance can save process manufacturing costs, improve business efficiency.