Техническая информация Sumitomo - страница 12

Technical Guidance
Basics of Endmilling Endmilling Edition


■ Up-cut and Down-cut ● Side Milling ● Slotting
fz fz
fz
Work
material
Up-cut
Work material Work material Down-cut
Work Feed Direction Work Feed Direction
Work Feed Direction
(a) Up-cut (b) Down-cut


Work material Work material
Work Feed Direction Work Feed Direction

(a) Up-cut (b) Down-cut


● Wear Amount ● Surface Roughness ● Condition
Work: S50C
Feed Dir. Vertical Dir. Endmill: GSX21000C-2D
0.08 (ø10mm, 2 teeth)
Flank Wear Width (mm)


0.07 5 Cutting Conditions: vc=88m/min
0.06 Up-cut (N=2800min-1)
4
0.05 Down-cut vf=560mm/min
Rz (μm)


Down-cut
0.04 3 (fz=0.1mm/t)
0.03 Up-cut
Down-cut Up-cut ap=15mm
0.02 2
ae=0.5mm
0.01
1 Side Milling
0 50 100 150 200 250 Dry,Air
Cutting Length (m) 0


■ Relation Between Cutting Side Milling Slotting
Condition and Deflection
Work: Pre-hardened steel Work: Pre-hardened steel
Endmill
(40HRC) (40HRC)
Specifications Cutting Conditions: vc=25m/min Cutting Conditions: vc=25m/min
ap=12mm ap=8mm
ae=0.8mm ae=8mm Up-cut Down-cut

Feed rate Feed rate Feed rate Feed rate
Cat. Number Helix 0.16mm/rev 0.11mm/rev 0.05mm/rev 0.03mm/rev
No. of Teeth Angle Style Style Style Style
Up-cut Down-cut Up-cut Down-cut Up-cut Down-cut Up-cut Down-cut
GSX40800S-2D GSX20800S-2D


N 2 30°
Technical Guidance /
References


4 30°

Cutting surface · The tool tip tends to back off with the down-cut. · The side of the slot tends to cut into the up-cut side toward the bottom of the slot.
Results
Reference surface · 4 teeth offers more rigidity and less backing off. · 4 teeth offers higher rigidity and less deflection.

N20