1766 Каталог MITSUBISHI 2020 Режущий инструмент Фрезы Резцы Сверла Пластины Стр.R014

Каталог MITSUBISHI 2020 Режущий инструмент для станков Стр. R014 1766 Lab2u

TECHNICAL DATA FUNCTION OF TOOL FEATURES FOR TURNING RADIUS Radius effects the cutting edge strength and finished surface. In general, a corner radius 2-3 times the feed is recommended. Feed Depth ofCut Theoretical Finished Surface Roughness Feed Depth ofCut Theoretical Finished Surface Roughness 40 30 t /> -o 20 Feed (mm/rev) 0.075 -O- 0.106 0.150 0.212 O- 0.300 0.4 0.8 1.2 1.6 2.0 Corner Radius (mm) Workpiece: JIS SNCM439 (200HB) Grade : P20 Cutting Conditions: vc=120m/mln ap=0.5mm Corner Radius and Finished Surface 2 o ro a. Workpiece: JIS SNCM440 (280HB) Grade: P10 Cutting Conditions: vc=100m/min n- O i 4) f 1000 3 z a> Li o 0.5 1.0 1.5 2.0 ap=2mm £ „ .. t x f=0.335mm/rev Corner Radius (mm) Corner Radius Size and Tool Life Due to Fracturing £ °'4 i n 0.2 n 0 I I Flank Wear a Cra (Crate ter Wear Depth) i E E 0.08 g a. o a 0.04 n 0.5 1.0 1.5 2.0 Corner Radius (mm) Workpiece: JIS SNCM439 (200HB) j Grade : P10 2 Cutting u Conditions : vc=140m/min ap=2mm f=0.212mm/rev Tc=10min Corner Radius Size and Tool Wear Effects of Corner Radius 1. Increasing the corner radius improves the surface finish. 2. Increasing the corner radius improves cutting edge strength. 3. Increasing the corner radius too much increases the cutting resistance and causes chattering. 4. Increasing the corner radius decreases flank and rake wear. 5. Increasing the corner radius too much results in poor chip control. When to Decrease Corner Radius O Finishing with small depth of cut. OThin, long workpieces. OWhen the machine has poor rigidity When to Increase Corner Radius OWhen the cutting edge strength is required such as in intrrupted cutting and uncut surface cutting. OWhen roughing a workpiece with large diameter. OWhen the machine has high rigidity. ICorner Radius and Chip Control Range R Workpiece : JIS S45C (180HB) Insert: TIMGG160404R TNGG160408R TNGG160412R (STilOT) Holder: ETJNR33K16 (Side Cutting Edge angle 3’) Cutting Speed: vc=100m/min Dry Cutting R014