WIDIA - Полный каталог инструмента - 2017
для размещения заказа - zakaz@widiahanita.ru
Copy Mills • M270™ Series
Additional Application Advice • M270 Ball Nose
Selecting the Correct Insert and Cutting Conditions for Your Application
1. Insert Style: Considerations for Selecting the Correct Insert
Best Choices for Insert and Grade Selection
First choice
Alternate choice
Grade
Roughing Operation
Finishing Operation
Low RPM Machine
Flat Areas or Face Milling (10° inclination)
Hard Machining
Unstable and/or Long Overhangs
HSM or 5-Axis Machining (smaller ap/ae values)
BR Geometry
BF Geometry
TN7535
TN2510
TN2505
2. Calculating effective diameter and resulting surface speed
It is important t consider the effective
diameter (Deff) when using light depths
of cut in order to properly calculate RPM
values. Use the following formula when
machining flat surfaces or inclinations
of 10° or less to find the Deff value,
and then use this for RPM calculations
as opposed to using the overall insert
diameter (D1).
Deff 2-(D1-2Ap1)2
When machining inclinations between
11° and 55°, further modification of vc
is required. Apply factor “k” from the
given formula to calculate the correct
vc (vceff). This corrected value is then
Ap1 used to calculate the proper RPM for
the tool.
Deff
Deff
D1 D1
k=
1
sin [ + arcCos (1-(2 (Ap1/D1)))]
v eff = v X k
cc
Starting Values for Semi-Finishing in Common Material Types (L/D ratio <3 x D1)
M270 is usually applied for semi-finishing and finishing operations; Ap1/ae conditions depend on the operation. As a general rule: Ap1/ae )0,05D.
Tool Diameter
10 12 16 20 25 32
Material
Soft Steel <250 HB
High-Strength Steel
33–44 HRC
Hardened Steel
44–55 HRC
Grey Cast Iron GG25…
Nodular Cast Iron
GGG60…
max rec.
(mm)
Ap1 ae
max rec.
fz (mm)
(mm/
tooth) Ap1 ae
max rec.
fz (mm)
(mm/
tooth) Ap1 ae
max rec.
fz (mm)
(mm/
tooth) Ap1 ae
max rec.
fz (mm)
(mm/
tooth) Ap1 ae
max rec.
fz (mm)
(mm/
tooth) Ap1 ae
fz
(mm/
tooth)
0,7 0,7 0,2 0,8 0,8 0,2 1,1 1,1 0,27 1,3 1,3 0,27 1,7 1,7 0,3 2,1 2,1 0,3
0,5 0,5 0,15 0,6 0,6 0,2 0,8 0,8 0,25 1 1 0,25 1,3 1,3 0,25 1,6 1,6 0,25
0,3 0,3 0,15 0,4 0,4 0,2 0,5 0,5 0,22 0,7 0,7 0,22 0,8 0,8 0,25 1,1 1,1 0,25
1 1 0,2 1,2 1,2 0,25 1,6 1,6 0,25 2 2 0,25 2,5 2,5 0,3 3,2 3,2 0,3
0,7 0,7 0,2 0,8 0,8 0,25 1,1 1,1 0,25 1,3 1,3 0,25 1,7 1,7 0,3 2,1 2,1 0,3
zakaz@widiahanita.ru
www.widiahanita.ru
M117