a very warm welcome (arial, 24-point bold font) - … · horn technology days 2015 trochoidal hard...
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A very warm welcome (Arial, 24-point bold font)
Discover what's under the surface (Arial, 20-point bold font in italics)
HORN Technology Days 2015
Trochoidal hard milling
with coated
solid carbide milling cutters
Speaker: Andreas Jenter
Structure
Explanation
Comparison of conventional and trochoidal milling
Trochoidal hard milling
Cutting data
Approach strategy
Application examples
Summary
Constant fz
Variable average chip thickness
Trochoidal milling
CAM
Constant hm
Variable feed rate
CNC
Cutting data
ae max
N ae 33% ~70°
P ae 23% ~57°
M ae 18% ~50°
K ae 20% ~53°
H ae 8% ~33°
vc - fz - ap
vc + 0% - + 80%
fz + 0% - + 100%
ap 1 x •Ø - 3 x Ø
Trochoidal hard milling
Material 42CrMo4 55 HRc Milling cutter Ø 6, Z 4, R 0.5
Type DSTH…TS3E
Machine DMU 85FD
vc 180 m/min (nmax spindle)
fZ 0.06 mm
ae 12% / Ø (40°)
ap 5.5 mm
Approach strategy
From outside
Start bore
Helix or ramp, adjust cutting data
5-axis, utility program
Trochoidal/Level roughing
Level roughing
vc 150 m/min
fZ 0.08 mm
ae 70%
ap 1 mm
Trochoidal roughing
vc 168 m/min
fZ 0.12 mm
ae 6% / 10°
ap 15 mm
Constant average chip thickness
Low torque
Low thermal load
Efficient tool use
Longer tool life
Take note of the plunge strategy
Summary