Technology

Mirror Finishing
STAVAX / 52HRC
PCDRB / PCD Ball End Mill

Work size: 200×100(mm)

Material : STAVAX 52HRC
Cutting time: 94hr 50min.

The Roughness is less than Ra0.05µm.
Finished surface looks "smooth, even and shiny" such as the mirror surface.
Used MRBH230 for roughing and SSPB220 for Semi-finishing.

Tool

PCDRB
R1×5


•Unique tool geometry makes stable surface.
•Polish-less machining become reality by nano-level roughness on profiling finish.
•Upgraded tool edge design makes stable high quality surface.


SSPB220
R1×5


•Adopted spiral ball shape to improve sharpness of cutting edge.
•Adopted cutting edge shape to improve the chipping resistance of cutting edge.
•When peripheral cutting edge makes contact with cutting surface, vibration occurs by an increase in cutting resistance and it affects tool life and cutting surface quality. The influence can be reduced by adoption of the strong back taper shape.
•Enlarged standard tool size up to R3 to extend application range.


MRBH230
R3×10 · R2×8 · R1×6


•MUGEN-COATING PREMIUM for hardened steels and unique new design excel in chipping prevention and resolves chattering to realize excellent finished surface.
•Applicable for hardened steels up to 68HRC.
•Total 190 sizes!

Cutting Condition

Cutting Process 1st Roughing 2nd Roughing 3rd Roughing Semi-finishing Finishing
Tool MRBH230
R3×10
MRBH230
R2×8
MRBH230
R1×6
SSPB220
R1×5
PCDRB
R1×5
Spindle Feed
(min-1)
15,000 15,000 20,000 45,000 45,000
Feed
(mm/min)
2,500 2,000 1,500 1,200 1,200
Depth of Cut
ap×ae(mm)
0.3×2.0 0.2×1.0 0.05×0.05 0.02×0.02 0.005×0.005
Stock
(mm)
0.15 0.07 0.025 0.005 -
Coolant Water-insoluble fluid
Cutting Time 8hr18min 1hr42min 5hr7min 15hr58min 63hr45min

Comment

CBN tool that is proper to cutting high hard metals is used for semi-finishing process for stock equalization. Furthermore, PCDRB is used for finishing process which adopted PCD (sintered diamond) and unique cutting edge. CBN tool and PCD tool combination realized mirror like surface quality without polishing.

Related Movie

PCD Ball End Mill(PCDRB)

  • Unique tool geometry makes stable surface.
  • Upgraded tool edge design makes stable high quality.
  • Polish-less machining become reality by nano-level roughness on profiling finish.