Common problems and solutions of drill bits for deep hole drilling
Surface roughness of the hole
1. Chip adhesion: reduce cutting speed; Avoid blade breakage; Replace with cutting fluid with high extreme pressure and improve the filtration situation; Increase the pressure and flow rate of cutting fluid.
2. Poor coaxiality: Adjust the coaxiality between the machine tool spindle and the drill sleeve; Use appropriate drill sleeve diameter.
3. If the cutting speed is too low, the feed rate is too large or uneven: use appropriate cutting parameters.
4. Inappropriate tool geometry: changing the cutting edge geometry angle and the shape of the guide block
The orifice is horn shaped
Poor coaxiality: Adjust the coaxiality of the machine tool spindle, drill sleeve, and support sleeve; Use appropriate drill sleeve diameter and replace worn-out drill sleeves in a timely manner.
Drill bit broken
1. Poor chip breakage and inability to discharge chips: Change the size of the chip groove to avoid being too long or too shallow; Promptly detect blade breakage and replace it; Increase the pressure and flow rate of cutting fluid; Use workpieces with uniform material organization.
2. Excessive, insufficient, or uneven feed rate: Use appropriate cutting parameters.
3. Excessive wear of drill bit: Regularly replace the drill bit to avoid excessive wear.
4. Inappropriate cutting fluid: Choose the appropriate cutting fluid and improve the filtration situation.
Low lifespan of drill bit
1. Cutting speed too high or too low, excessive feed rate: Use appropriate cutting parameters.
2. Inappropriate drill bit: Replace the tool material; Change the position and shape of the directional block.
3. Inappropriate cutting fluid: Replace with cutting fluid with high extreme pressure; Increase the pressure and flow rate of cutting fluid; Improve the filtration of cutting fluid.
other
The chips are in a strip shape: the geometric shape of the chip groove is not suitable; Inappropriate geometric shape of cutting edge; The feed rate is too small; Uneven material organization of the workpiece: changing the geometric shape of the chip groove and cutting edge; Increase the feed rate; Use workpieces with uniform material organization.
Chip size too small: The chip groove is too short or too deep; The radius of the chip breaker is too small: changing the geometric shape of the chip breaker.
Excessive chip size: The chip groove is too long or too shallow; Excessive chip groove radius: changing the geometric shape of the chip groove