Kyocera - Каталог фрезерование 2017 ENG
для заказа - kyocera@kyocera-tools.ru GRADES A
B
THEORETICAL (GEOMETRICAL) SURFACE ROUGHNESS C
D
Theoretical (Geometrical) Surface Roughness E
F
Theoretical Surface Roughness for Turning indicates the minimum roughness value from the cutting conditions and it is shown by the formula as follows: G
H
Rz(h)= f2 x103 Rz(h) : Theoretical Surface Roughness [m] f Rz(h) LINEUP / INSERTS 45 / 70 LEAD J
8R(r) f : Feed Rate [mm/rev] R K
R (r) : Corner Radius of Insert [mm] (r) O
P
How to Obtain Surface Roughness Values Relationship with Triangle Symbol R
T
Type Symbol How to Obtain Explanation Arithmetical Mean Max. Height Ten Points Mean (Relationship 75 LEAD
Roughness Roughness Roughness with Triangle)
Ra(m) RzJIS(m)
Ry is a mean value in micron meter obtained Rz(m)
from the distance of the highest peaks
Arithmetical Mean Roughness Ten Points Mean Roughness Max. Height Roughness and the lowest valleys within the range of 0.025 0.1 0.1
sampled reference length ( l ) in the direction
of the center line of the roughness curve. m 0.050 0.2 0.2
Rz Note) When calculating Rz, extraordinarily 0.100 0.4 0.4
high or low threads are considered as Rp 90 LEAD
damages and excluded from the calculation, Ry 0.200 0.8 0.8
and only standard lengths are used. Rv
0.400 1.6 1.6
Rz=Rp+Rv 0.800 3.2 3.2
1.600 6.3 6.3 HIGH FEED
Yp1,Yp2,Yp3,Yp4,Yp5 : 3.200 12.5 12.5
Distance from the mean line to highest 5 6.300 25.0 25.0
Rz is a mean value in micron meter obtained peaks in the range of sampled reference
from the distance of 5 highest peaks (Yp) length “l ” 12.500 50.0 50.0 MULTI-FUNCTION SLOT MILLS RADIUS / BALL-NOSE OTHER APPLICATIONS TOOL HOLDING SPARE PARTS
and the 5 lowest valleys (Yv) measured from Yv1,Yv2,Yv3,Yv4,Yv5 : 25.000 100.0 100.0
the center line of the roughness curve within Distance from the mean line to the lowest
RzJIS the range of sampled reference length “l ”. 5 valleys in the range of sampled reference Finishing symbol (Triangle and wave ~) was removed from
length “l ” JIS standard in the 1994 Revision.
RzJIS = (Yp1+Yp2+Yp3+Yp4+Yp5) + (Yv1+Yv2+Yv3+Yv4+Yv5)
m • How to Indicate
5 Yp1 When Ra is 1.6m1.6mRa
Yv1 When Rz is 6.3m6.3mRz
When RzJIS is 6.3m6.3mRzJIS
Yp2
Yv2
Yp3
Yv3
Yp4
Yv4
Yv5
Yv5
Ra is obtained from the following formula
in micron meter, the roughness curve is
expressed by y=f(x), the X-axis is in the
Y
direction of the center line and the Y-axis is m
the vertical magnification of the roughness
Ra curve in the range of sampled reference Ra
length “l ”. X
Ra= 1 {f(x)}dx
0
Indication in JIS Standad 6.3 Example of Ry, (Rz) Indication Rz6.3
Example of Ra Indication When indicating upper limit only Indicate
When indicating the upper limit only surface roughness following the parameter symbol.
(when upper limit is 6.3 mRa)
When indicating both lower and upper limit 6.3 When indicating both lower and upper limit Indicate Rz6.3~1.6
(when upper limit is 6.3 mRa, lower limit is 1.6 mRa) 1.6 surface roughness as (upper limit ~ lower limit)
following the parameter symbol.
Note: The indications of Ra and Rz are different.
Caution-Symbols for Surface Roughness
The above information is based on JIS B 0601-2001. Type Symbol of JIS B 0601-1994 Symbol of JIS B 0601-2001 TECHNICAL
However, some symbols were revised as shown in the right table
in accordance with ISO Standard from JIS B 0601-2001 version. Max. Height Roughness Ry Rz
Ten Points Mean Roughness (Rz) was eliminated from 2001 Ten Points Mean Roughness Rz (RzJIS)
version but it still remains as RzJIS reference, since it was Arithmetical Mean Roughness Ra Ra
popular in Japan.
INDEX
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