Общий каталог FANAR 2021 - страница 340

Technical information i 11.4. Formulas to calculate technological parameters for drilling and tapping Relationships of peripherial speed andd rotational speed andd tool diameter Cutting speed Vc [m/min] Cutting force per one tooth Fc [N] Spindle rotation speed [RPM] Power P [kW] Feeding speed Vf [mm/min] Key: d1 - nominal diameter of tool [mm] when tapping vc - cutting speed [m/min] n - spindle rotation speed [RPM] when drilling p - thread pitch [mm] P - power [kW] vf - feeding speed [m/min] Torque when tapping Md [Nm] fo - feed per revolution [RPM] kc - specific resistance of workpiece material [MPa] Md - torque when tapping [Nm] Torque when drilling Mc [Nm] z - cutting edges 12 337