The use of drill bits:

1, drill bits should be installed in special packaging boxes to avoid collision with each other.

2. When in use, the bit taken out of the packing box should be immediately loaded into the spring chuck of the spindle or in the tool library for automatically replacing the bit. Then run back to the packing box.

3. To measure the diameter of drill bit, non-contact measuring instruments such as tool microscope should be used to avoid the contact between cutting edge and mechanical measuring instrument.

4. Some NC drilling machines use positioning rings, but some NC drilling machines do not use positioning rings, such as the use of positioning rings when the installation of depth positioning must be accurate, such as the use of positioning rings its bit installed on the spindle to adjust the elongation of the same, multi-spindle drilling machine should pay more attention to this point, so that each spindle drilling depth to be one That is. If it is inconsistent, it may cause the drill to drill on the table or fail to pierced through the circuit board, resulting in scrapping.

5, at ordinary times, 40 times stereoscopic microscope can be used to check the wear of the cutting edge of the drill bit.

6. Always check the concentricity of the spindle and spring chuck and the clamping force of the spring chuck. If the concentricity is not good, the small diameter drill will be broken and the hole diameter will be large. If the clamping force is not good, the actual rotational speed does not conform to the set rotational speed and the clamping force between the chuck and the drill will slip.

7. The clamping length of the fixed bit on the spring chuck is 4~5 times the diameter of the drill handle to be clamped.

8, check the spindle presser frequently. The contact surface of the presser foot should be horizontal and not perpendicular to the main shaft, so as to prevent drilling and deviating holes in the drill hole.

9. The dust absorption effect of the drilling machine is better. The dust absorption air can reduce the temperature of the drill bit, and the dust taken away by colleagues can reduce friction and produce high temperature.

10. The laminated substrate includes the upper and lower backing plates to be positioned firmly and flattened in a hole-slot positioning system on the worktable of the drilling machine. The use of adhesive tape prevents drilling from sticking to bits on the tape to cause chip removal and break down.

11, order the manufacturer's drill bit, when the factory inspection, we need to check the 4% whether it meets the requirements. 100% of them were examined by 10~15 times microscope for their gaps, scratches and cracks.

12. Timely regrinding of the bit can increase the number of bits used and regrinded, prolong the life of the bit, and reduce the production cost and cost. Usually measured by a tool microscope, the wear depth of the two main cutting edges should be less than 0.2mm. Wear 0.25mm when grinding. The conventional fixed bit can be reworn for 3 times, and the bit of the shovel head (undercut) can be reworn for 2 times. The quality and accuracy of drilling will drop if too much is turned over, which will result in scrapping of finished products. Excessive grinding is counterproductive.

13, when the wear and wear diameter is reduced by 2% compared with the original, the bit is scrapped.

14. Under normal circumstances, the manufacturer provides a table of parameters for the rotational speed and downward speed of the drill bit produced by the factory. This parameter is only a reference. In practice, the technicians have to obtain a parameter of the rotational speed and downward speed of the drill bit in accordance with the actual situation, usually the actual parameters and the reference parameters. There are differences but there are not many differences.

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