1079 Каталог KORLOY 2016 Металлорежущий инструмент и станочная оснастка ENG Стр.L12

Каталог KORLOY 2016 Инструмент и оснастка Стр. L12 1079 ENG Lab2u

Turning Insert shape and terminology Shank width Cutting edge inclination Terminology Function Effect Rake angle Side rake angle Rake angle Cutting force, Cutting heat, The effects of chip control on tool life (+): Excellent machine-ability (reducing cutting force, weakening cutting edge strength) (+): When machining excellent machine-ability or thin workpiece. (-): When strong cutting edge is needed at interrupted condition or mill scale. Relief angle Relief angle Side relief angle Only cutting edge contact with cutting face (-): Cutting edge is strong but has short tool life to make bad influence on flank wear. Cutting edge angle Cutting edge angle Affects chipcontrol and cutting force direction (+): Improved chip control because chip thickness is big. Side cutting edge angle Affects chipcontrol and cutting force direction (+): Strong cutting edge due to distributed cutting force but chipcontrol is bad by thin chip thickness (-): Improved chip performance. End cutting edge angle Prevent friction between cutting edge and cutting face (-): Cutting edge is strong but has short tool life to make bad influence on flank wear. Calculation formulas for machining Cutting speed n D xn vc = 1000 (m/min) vc Cutting speed (m/ in) D Diameter (mm) n Revolution per minute (min-1) n: Circular constant(3.14) Feed fn = (mm/rev) fn Feed per revolution(mm/rev) vf Table feed (mm/min) n Revolution per minute (min-1) Surface finish Rmax Rmax Profile depth(Maximum height roughness) (p) fn feed (mm/rev) r: nose radius Theoretical surface roughness Rmax = 1000(um) Practical surface roughness Steel: Rmax x (1.5 3) Cast iron Rmax x (3 5) 12 Power requirement Pkw = Qxkc 60x102 n Php = 0.75 Q= vc x fn x ap 1000 Pkw Php VC ap Power requirement kW -fn Power requirement (horse power) HP kc Cutting speed m/min r Depth of cut mm Feed per revolution mm/rev Specific cutting resistance kg/mm2 Machine efficiency rate (0.7 0.8) Technical Information Rough Kc Mild steel 190 Medium carbon steel 210 High carbon steel 240 Low alloy steel 190 High alloy steel 245 Cast iron 93 Malleable cast iron 120 Bronze, Brass 70 Material removal rate Q (cm3/min) = vc x ap x fn Material removal rate cif/min Depth of cut mm Cutting speed m/min Feed per revolution mm/rev P KW