923 Каталог KYOCERA 2016 Инструмент режущий станочный Пластины Резцы Фрезы Сверла Стр.R3

Каталог KYOCERA 2016 Режущий инструмент для станков Стр. R3 0923 Lab2u

Surface Roughness (JIS B 0601-2001) Theoretical (Geometrical) Surface Roughness Theoretical surface roughness for turning indicates the minimum roughness value from the cutting conditions and it is shown by the formula as follows. f2 Rz(h)= X103 8R(rs) Rz(h): Theoretical Surface Roughness pm f: Feed Rate mm/rev R(rs): Corner Radius of Insert mm How to Obtain Surface Roughness Values Relationship with Triangle Symbol Type Symbol How to Obtain Explanation Rz Rz is a mean value in micron meter obtained from the distance of the highest peaks and the lowest valleys within the range of sampled reference length ("I") in the direction of the center line of the roughness curve. Note) When calculating Rz, extraordinarily high or low threads are considered as damages and excluded from the calculation, and only standard lengths are used. Rz=Rp+Rv Rzjis Rzjis is a mean value in micron meter obtained from the distance of 5 highest peaks (Yp) and the 5 lowest valleys (Yv) measured from the center line of the roughness curve within the range of sampled reference length "I". Rzjis= (Ypi+ 3+Yp4+Yp5) + (Yvi+Yv2+Yv3+Yv4+Yv5) Yp1,Yp2,Yp3,Yp4,Yp5: Distance from the mean line to the highest 5 peaks in the range of sampled reference length "I" Yv1:Yv2:Yv3: Yv4,Yv5: Distance from the mean line to the lowest 5 valleys in the range of sampled reference length "I" Ra 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 direction of the center line and the Y-axis is the vertical magnification of the roughness curve in the range of sampled reference length "I". Ra= -g-J"l f(x) dx 5 Y X Arithmetical Mean Roughness Ra (pm) Max. Height Roughness Rz (pm) Ten Points Mean Roughness Rzjis (pm) (Triangle Symbol) 0.025 0.1 0.1 0.05 0.2 0.2 VVVV 0.1 0.4 0.4 0.2 0.8 0.8 0.4 1.6 1.6 0.8 3.2 3.2 VVV 1.6 6.3 6.3 3.2 12.5 12.5 6.3 25 25 VV 12.5 50 50 V 25 100 100 Finishing symbol (Triangle V and wave ) was removed from JIS standard in the 1994 Revision. How to Indicate (1) When Ra is 1.6pm 1.6pmRa (2) When Rz is 6.3pm 6.3pmRz (3) When Rzjis is 6.3pm 6.3pmRzjiS Indication in JIS Standard Example of Ra Indication Example of Rz Indication (1) When indicating the upper limit only 63/ (when upper limit is 6.3pmRa) < / ///) (2) When indicating both lower and upper limit / (when upper limit is 6.3pmRa, lower limit is 1.6pmRa) g / ///) (1) When indicating the upper limit only indicate / Rzg3 surface roughness following the parameter \/ symbol. (2) When indicating both lower and upper limit / Rz6 3 16 indicate 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. IHowever, some symbols were revised as shown in the right table in accordance with ISO Standard from JIS B 0601-2001 version. Ten Points Mean Roughness (Rz) was eliminated from 2001 version but it still remains as Rzjis reference, since it was popular in Japan. Type Symbol of JIS B 0601-1994 Symbol of JIS B 0601-2001 Max. Height Roughness Ry Rz Ten Points Mean Roughness Rz (Rzjis) Arithmetical Mean Roughness Ra Ra R3 Technical Information