573 Каталог SUMITOMO 2018 Инструмент металлорежущий Пластины Резцы Фрезы Сверла Стр.N17

Каталог SUMITOMO 2018 Инструмент металлорежущий Стр. N17 0573 Lab2u

SUMIBORON Technical Guidance Hardened Steel Machining Application Map of the Various Tool Materials Workpiece hardness (HRC) Influence of Coolant on Tool Life Continuous cutting Interrupted cutting 20 40 60 80 100 120 14 Cutting time (min) Work material: l00Cr6 (HRC58 62) For continuous cutting, the influence of nsert: TPGN160304 coolant on tool life is minimal. However for Cutting data: vc = 100 m/min interrupted cutting, coolant will shorten the fc = 0,15 mm tool life because of thermal cracking. f = 0,1 mm/rev Work Materials and Cutting Speed Recommendations Relation Workpiece Hardness and Cutting Forces Workpiece hardness (HRC) Back force increases substantially for harder work materials. Relation between Flank Wear and Cutting Force Workpiece Hardness on Cutting Force and Accuracy Back force (N) 300 34CrMo4 HRC65. Cutting data: Vc = 80 m/min doc = 0,15 mm f = 0,1 mm/rev 0 rincip 100 Pr al force (N) 0,05 Q 0,10 =8 ° -5 g e0 e1 LL a rce (N) 0,05 O 0,10 =8 0 a Q- 0,05 0,10 Flank wear width VB (mm) For hardened steel machining, back force increases substantially due to the expansion of flank wear. ..Ha±d zone Soft Hard zone zone I Shore hardness (HS) 70 50 30 r 45(HS) Back force (N) 400 - 300 200 1,1 j 6 > Dimensions (mm) Размеры указаны в мм 0 I 10 -20 r 13 m Cutting data: Vc = 120 m/min doc = 0,5 mm f = 0,3 mm/rev dry External dimension at the soft zone is smaller due to lower cutting forces. 200 Relation Cutting Speed and Surface Roughness 0 40 80 120 160 Machining output (pcs.) At high cutting speeds, surface roughness is more stable. I Improvement of Surface Roughness by Altering the Feedrate Work material: 25CrMo4 (HRC58 62) Holder: MTXNR2525 Insert: TNMA160408NU Cutting data: Vc= 120, 150. 180 m/min doc = 0,15 mm f = 0,045 mm/rev Wet Constant Feedrate Previous edge position 1' Stationary notch location Variable Feedrate Shifting notch location TO 0,3 0 Varying the feedrate spreads the notch location over a larger area, surface finish improves and notch wear decreases. N17 Technical Guidance