Drill use and maintenance:
1, the drill should be installed in a special packaging box to avoid vibration collision with each other.
2, when in use, remove the drill from the packaging box should be installed in the spring clamp of the spindle or automatically replace the drill tool library. Put it back in the box when you're done.
3, the diameter of the drill should be measured with a tool microscope and other non-contact measuring instruments to avoid cutting edge contact with the mechanical measuring instrument and be hurt.
4, some CNC drilling machines use positioning rings Some CNC drilling machines do not use positioning rings, such as the use of positioning rings when the depth of its installation must be accurate, if not used
The extension length of the positioning ring drill bit installed on the spindle should be adjusted uniformly, and the multi-spindle drilling machine should pay more attention to this point, so that the drilling depth of each spindle should be consistent. If inconsistent there is
May cause the drill bit to reach the table or fail to drill through the circuit board resulting in scrap.
5, usually can use 40 times the stereo microscope to check the drill cutting edge wear.
6, to often check the concentricity of the spindle and the spring chuck and the clamping force of the spring chuck, the concentricity is not good, it will cause small diameter drill break and hole, large diameter and so on
Poor tightening force will cause the actual speed and the set speed is not consistent, and the chuck and the drill slip.
7, the clamping length of the fixed handle drill bit in the spring chuck is 4 to 5 times the diameter of the drill handle to clamp firmly.
8, always check the spindle press foot. The contact surface of the press foot should be horizontal and perpendicular to the spindle, and cannot be shaken to prevent broken drilling and deviation holes in the drilling.
9, the suction effect of the drilling machine is better, the suction air can reduce the temperature of the drill, and the dust taken by the colleague can reduce the friction and produce high temperature.
10, the substrate lamination including the upper and lower plate should be positioned firmly and flat in the one-hole and one-slot positioning system on the drilling machine's workbench. Use adhesive tape to prevent drill bit from drilling
The tape makes the drill stick to chips, resulting in chip removal difficulties and drill breakage.
11, ordering the manufacturer's drill, in the factory inspection to spot check whether 4% of its compliance with the regulations. And 100% with 10 to 15 times the microscope to examine the notch, abrasion and crack
Tattooed.
12, the bit timely regrinding, can increase the use of the bit and the number of regrinding, extend the life of the bit, reduce production costs and expenses. Usually measured with a tool microscope, in
Within the full length of the two main cutting edges, the wear depth should be less than 0.2mm. During regrinding, 0.25mm should be ground away. An ordinary fixed shank drill can be reground 3 times, and a shovel head (bottom cut) drill can be reground
Regrind twice. Turning over too much of its drilling quality and accuracy will be reduced, resulting in the scrap of circuit board finished products. Excessive grinding has the opposite effect.
13, when due to wear and its wear diameter is reduced by 2% compared with the original, the bit is scrapped.
14. Setting of drill parameters Under normal circumstances, manufacturers provide a parameter table of the drilling speed and speed of the drill produced by the factory. The parameter is only for reference.
In fact, it is also necessary for the technician to obtain a drill speed and speed parameters that meet the actual situation through actual use, usually the actual parameters are different from the reference parameters, but the difference is not too much.
