Značilnosti vrtanja lukenj za obdelavo globokih lukenj

(1) Leave a small and stable margin for the bottom hole. The bottom hole cannot be drilled at one time with a drill, and the size of one drilling is unstable. You should drill with a smaller drill first, and then use a suitable drill to ream the hole. The bottom hole allowance is between 0.05 and 0.1 mm. The roughness should not be too bad, and should reach Ra6.3μm.

(2) The cutting edge of the reamer must be ground, with a roughness of Ra0.4μm or less, and the transition arc between the guide edge and the cutting edge should be ground to avoid straining the parts when the tool is retracted.

(3) Hitrost rezanja med povrtanjem je manjša od 20mm/min, hitrost pomika pa mora biti 0,2 mm/r.

(4) Dodajanje tekočine za umiljenje pri vrtanju pomaga izboljšati hrapavost površine.