Cutting tool set some parameters

     Parameter tool cutting portion of the tool life, ease of processing and machining accuracy plays a vital role, but also a direct impact on processing costs, processing efficiency, so that each part of the tool cutting parameters should be a reasonable choice.

     (1) Drilling part: In order to ensure the terrible strength of the drill, the front corner taken 118. . Usually take the first angle is zero. -5. After angle 6. -8. This space can be expanded to accommodate the chip, reducing drill larvae L and wall friction, while also ensuring the strength of the secondary cutting edge.

     (2) reaming part: As the reaming margin is very small, thin chips, chip rake face contact with a short rake angle is very limited for ease of manufacture, the rake angle take 00--50, after taking corner 60-- 80, the cutting edge land width of 0.2- 0.3mm. Reamer four teeth, the cutting edge of the blade right-handed helix. For the reamer steady work to improve the surface quality, cutting chips discharged smoothly from the front of the reamer, to avoid scratching the chip hole wall and reduce the amount of expansion of the hole.