OPERATION
HOLZMANN MASCHINEN GmbH www.holzmann-maschinen.at
39
BF16V
Arbor cutters:
Shell end mills, side milling cutters and milling heads are clamped on arbors.
For driving the milling cutters, arbors are equipped with a longitudinal wedge
or a driver. Never clamp end mills without a longitudinal wedge or driver. Side
milling cutters can be clamped with right- or left-hand cutting (pay attention
to the direction of rotation). Here too, all components must be clean and must
not be damaged.
18.7.6
Clamping of workpieces
The workpieces can be clamped with machine vice, clamping screws, clamps, clamping bases, low
and flat clamps, eccentric clamps, dividing head, rotary tables, jaw chucks, ...
Requirements which the clamping device must meet:
•
Rigid clamping of the workpieces
•
No deformation of the workpieces during clamping and milling (weakening of the
workpiece during milling).
•
Good repeatability of the clamping process (for more than one part).
•
Fast, easy and safe handling.
18.7.7
Feed
Guide values for the feed in mm per tooth
Cutter Ø
2 bis 4mm
Cutter Ø
5 bis 8 mm
Cutter Ø
10 bis 25 mm
Cutter Ø
25 bis 100 mm
Tool
roughing
finishing
roughing
finishing
roughing
finishing
roughing
finishing
HSS
0,004
0,003
0,03
0,01
0,1
0,07
0,02
0,1
18.7.8
Cutting speed (guide values)
Material
Tool
Cutting speed m/min
end mill
shell end mill
side mill
Steel to 500 N/mm
2
HSS
25 to 35
25 to 35
20 to 25
Steel up 500 N/mm
2
HSS
15 to 22
15 to 22
12 to 15
Stainless steel 18/10
HSS
10 to 12
10 to 12
8 to 10
Aluminum
HSS
70 to 90
70 to 90
60 to 70
Brass (CuZn)
HSS
50 to 60
60 to 70
50 to 60
Examples of speeds:
Cutter:
Ø 2 mm
Ø 4 mm
Ø 6 mm
Ø 8 mm
Ø 10 mm
Ø 12 mm
6 m/min
955 min
-1
478 min
-1
318 min
-1
239 min
-1
191 min
-1
159 min
-1
8 m/min
1274 min
-1
637 min
-1
425 min
-1
318 min
-1
255 min
-1
212 min
-1
10 m/min
1592 min
-1
796 min
-1
531 min
-1
398 min
-1
318 min
-1
265 min
-1
12 m/min
1911 min
-1
955 min
-1
637 min
-1
478 min
-1
382 min
-1
318 min
-1
