583 Каталог SUMITOMO 2015 Режущий инструмент и инструментальная оснастка Стр.579

Каталог SUMITOMO 2015 Инструмент и оснастка Стр. 579 0583 ENG Lab2u

Technical Guidance TECHNICAL GU DANCE Basics of Milling Illustration of Technical Terms Calculating Power Requirement Power Requirement ae x ap x vf x kc > Relation Between Feed Rate, Work Material, Specific Cutting Force Pc= Q x kc 60 x 10“ x h 60 x 10’ xh Horsepower Requirement Pc H 0.75 Chip Removal Amount Q fle x Qp x Vf Q 1000 Pc Power requirement (kw) H Required horsepower (HP) Q Chip removal amount (cm3/min) Qe Cutting width (mm) v, Feed rate (mm/min) Qp Depth of cut (mm) kc Specific cutting force (MPa) Rough value Steel 2,500 to 3,000MPa Cast iron 1,500MPa i Aluminium 800MPa h Machine efficiency (about 0.75) Alloy Steel Carbon Steel Cast Iron (1) 1.8 0.8 200 (2) 1.4 0.6 160 (3) 1.0 0.4 120 Figures in table indicate these characteristics. Alloy steel and carbon steel Traverse rupture strength s B(GPa) Cast iron Hardness HB .016 .024 .032 .039 Feed Rate (IPT) Cutting Force Comparison of Typical Sumitomo Mills Cutter Cutting Edge Angle (deg) Cutting Force (MPa) Work 4137 (250HB) Series A.R R.R A.A 0 0J 1.0 Q 1.5 Machine M/C (15HP) Cutting UFO +27° -7° 45° Backy 3L Feed force Vy lotal (D ( force paN\ FPG +15° -4° 45° force/ Princ force fz _0.012 IPT DPG + 8° -0° 15° ap _0.118" Calculating Cutting Speed v p x Dc x n Vc 1,000 1,000 x vc n p x Dc Calculating Feed Rate vf _fz x z x n fz Vf vc Cutting speed (SFM) p 3.14 Dc Cutter diameter (inch) n Rotational speed (min-1) Vf Feed rate per minute (IPM) fz Feed rate per tooth (IPT) z Number of teeth f Feed rate (IPR) 579 Technical Guidance