CNC plane drill--details on the use of the drill bit

⒈ The drill bits should be installed in a special packing box to avoid vibrations from colliding with each other. CNC plane drilling.

2. When in use, take out the drill bit from the packing box and immediately install it in the spring collet of the spindle or in the tool magazine for automatically changing the drill bit. After use, put it in the box.

3. Measure the diameter of the drill bit with a non-contact measuring instrument such as a tool microscope to avoid injury caused by contact between the cutting edge and the mechanical measuring instrument.

4. Some CNC drilling machines use positioning rings, while some CNC drilling machines do not use positioning rings. If a positioning ring is used, the depth positioning must be accurate during installation. If a retaining ring is not used, the extension of the drill bit mounted on the spindle should be adjusted. Multi-spindle drilling machines should pay more attention to this, so that the drilling depth of each spindle is consistent. If it is not consistent, the drill bit may drill into the countertop or fail to drill the circuit board, resulting in scrap.

⒌Usually, a 40x stereo microscope can be used to check the wear of the cutting edge of the drill bit. CNC plane drilling.

6. Frequently check the concentricity of the spindle and collet and the clamping force of the collet. Poor concentricity will cause the small diameter drill bit to break and the hole diameter to be large. Poor clamping force will cause the actual speed to be inconsistent with the set speed, and slip between the chuck and the drill bit.

⒎The clamping length of the fixed shank drill bit on the spring chuck is 4 to 5 times the diameter of the drill shank.

8. Check the spindle presser frequently. The contact surface of the presser foot should be horizontal and perpendicular to the main shaft to prevent broken drill and partial hole in the drilled hole.

⒐Drilling machine has a good dust absorption effect, and the dust suction wind can reduce the temperature of the drill bit, and at the same time take away the dust, reducing friction and generating high temperature.

⒑The substrate stack including the upper and lower backing plates should be firm and flat in the one-hole-one-slot positioning system on the drilling machine table. When using tape, prevent the drill bit from drilling on the tape, causing the drill bit to adhere to chips, resulting in difficulty in chip removal and drill breakage.

⒒When ordering the manufacturer's drill bit, 4% of it should be randomly checked whether it meets the requirements when entering the factory for inspection. 100% Check for nicks, scratches and cracks with a 10~15X microscope.

⒓ Timely regrinding of the drill bit can increase the use and regrinding times of the drill bit, prolong the service life of the drill bit, and reduce production cost and cost. Usually measured with a tool microscope, the wear depth should be less than 0.2mm. When regrinding, 0.25mm should be removed. Ordinary fixed shank drills can be reground 3 times, and undercut drills can be reground twice. Excessive grinding will reduce the quality and accuracy of drilling, and lead to the scrapping of finished circuit boards. Over-grinding is counterproductive. CNC plane drill

⒔ When the wear and wear diameter is reduced by 2% compared with the original, the drill bit will be scrapped.

⒕Drill bit parameter setting In general, the manufacturer provides the drill bit speed and speed parameter table, the parameters are for reference only, the actual craftsmen actually use the drill bit speed and speed parameters, usually the actual parameters are different from the reference parameters, but the difference is not too big.

⒖When grinding the drill bit, the two main cutting edges of the twist drill should be ground symmetrically as far as possible to offset the radial force of the two main cutting edges and prevent the drill bit deviation and hole diameter expansion. CNC plane drill