⒈ bit should be installed in a special packaging box, to avoid vibration collide with each other. CNC plane drilling
⒉ use, remove the drill from the box should be installed into the spindle collet chuck or automatically replace the bit tool magazine. Use it back into the box.
⒊ Measuring the diameter of the drill Use a non-contact measuring instrument such as a tool microscope to prevent the cutting edge from colliding with the mechanical measuring instrument.
⒋ Some CNC drilling machine use the positioning ring Some CNC drilling machine does not use the positioning ring, such as the use of fixed ring installation of the depth positioning must be accurate, such as the use of the positioning ring drill bit installed on the spindle to adjust the elongation of consistency , Multi-spindle drilling more to pay attention to this point, to make each spindle drilling depth to be consistent. If inconsistent it is possible to drill bit to the table or can not drill through the circuit board scrapped.
⒌ Usually 40 times the stereo microscope can be used to check the drill cutting edge wear. CNC plane drilling
⒍ Always check the concentricity of the spindle and collet chuck and collet chuck clamping force, poor concentricity will result in small diameter drill broken drill and large aperture, the clamping force is not good will cause the actual speed and settings The speed does not meet, between the chuck and the drill slip.
⒎ fixed handle drill chuck in the collet chuck length of 4 to 5 times the diameter of the drill handle to clamp.
⒏ Check the spindle presser frequently. The presser foot contact surface should be horizontal and vertical to the spindle can not be shaken, to prevent the drill cut and cut holes.
⒐ Drilling machine's vacuuming effect is better, vacuuming can reduce the bit temperature, while taking away the dust to reduce friction to produce high temperature.
⒑ The substrate stack includes top and bottom backing plates to be positioned and flattened in a hole-and-slot positioning system on the table of the drilling machine. The use of adhesive tape to prevent the drill bit drilling tape stuck to the drill bit chip, resulting in chip removal difficulties and broken drill.
⒒ order manufacturer's drill, factory inspection to sampling 4% of its compliance. And 100% with 10 to 15 times the microscope to check its nicks, abrasions and cracks.
適 timely re-grinding bit can increase the use of bits and the number of resharpening, drill bit life to extend and reduce production costs and costs. Usually measured by a tool microscope, the depth of wear should be less than 0.2 mm over the full length of the two main cutting edges. When grinding to wear to 0.25mm. Ordinary shank drill bits can be resized three times and undercut bits can be resharpened two times. Turning over the hole quality and precision of its drilling will decline, will result in scrapped PCB products. Overturn effect is counterproductive. CNC plane drilling
鉆 When due to wear and its wear diameter is reduced by 2% compared with the original, then the drill scrapped.
⒕ bit parameter settings Under normal circumstances, the manufacturer provides a production of the drill bit drilling speed and speed parameters table, the parameter is only a reference, in fact, but also the actual use of the craft to come up with a realistic In case of bit speed and speed parameters, usually the actual parameters and reference parameters are different but not too much difference.
⒖ bit sharpening, should try to twist the two major cutting edge grinding symmetry, so that the two main cutting edge of the radial force offset each other to prevent bit deflection and aperture expansion. CNC plane drilling