Page 312 - Pafana

IV. PŁYTKI WIELOOSTRZOWE INDEXABLE INSERTS МНОГОГРАННЫЕ ПЛАСТИНЫ

turning
technical information

Machining Finishing Roughing
parameters machining machining

K sinK
a p(min) 0,8 · r e 1,2 · r e r r
0 o 0,000
IV. a p(max) 0,3 · l · sinK r 0,4 · l · sinK r 30 o 0,500

f (min) 0,15 · r e 0,3 · r e 45 o 0,707
60 o 0,866
f (max) 0,5 · r e 0,55 · r e
75 o 0,966
A D(max) 0,8 a· p(max) f · (max) 90 o 1,000

- min. depth of cutting.
a p(min)
- max. depth of cutting.
a p(max)
l machining surface length.
-
- insert corner radius.
r ε
K - entering angle (degree).
r
- max. cross sectional area of cut.
A D(max)
- min. feed.
f (min)
- max. feed. machined surface.
f (max)

Cutting speed - according to the data on page 222 and 248 of the catalogue.
As there are many parameters which have influence over cutting speed selection, range of speeds
in the table above. Correct cutting speed can be found when we have an information concerning:
- type of workpiece material and hardness, - the area of cross - section of layer being cut A ,
D
- stability of the machine - clamping - workpiece - tool system and character of machining
( e.g. interrupted machining ) , - cutting tool angle, - expected tool life.
Machining parameters should be optimized - ( the economic period of the lifetime ) in order to select
the most efficient relations of parameter in existing machining conditions.

auxiliary formulas for calculations of cutting parameters at the turning

π x d x n V - cutting speed (m / min).
V =
Cutting speed (m / min )
1000
n - rotation speed (r / min).
d - machined diameter (mm).
Vx 1000
Rotation speed n = (r / min ) T - machining time (min).
π x d

L - machined surface lenght (mm).
L
Machining time T = ( min ) f - feed per revolution (mm / rev.).
o
f x n
o
- max. Roughness height profile (μm).
R a(max)
2
R = r - insert corner radius (mm).
a(max) · 125 ( mm ) ε

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