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Mitutoyo Institute of Metrology / Mitutoyo America Corporation / Chicago USA
Nobuo Suga
Precision Length
Measurement to
Improve Quality and Productivity
in Manufacturing
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Mitutoyo Institute of Metrology / Mitutoyo America Corporation / Chicago USA
A B
Comparison
Measurement
“Known” “Unknown”
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Mitutoyo Institute of Metrology / Mitutoyo America Corporation / Chicago USA
Artifact Standard
1: End Standard
2: Line Standard Gage Blocks
Glass Scales
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Mitutoyo Institute of Metrology / Mitutoyo America Corporation / Chicago USA
Carl E. Johansson (1864-1943)
“The Master of Measurement,” also known as “the most precise man”reached 1µm at the turn of the last century
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Mitutoyo Institute of Metrology / Mitutoyo America Corporation / Chicago USA
Johansson’s Gage Block Set patented in 1911
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Mitutoyo Institute of Metrology / Mitutoyo America Corporation / Chicago USA
µ
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Mitutoyo Institute of Metrology / Mitutoyo America Corporation / Chicago USA
633 633 633 633
Gage Block
L End Standard
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Mitutoyo Institute of Metrology / Mitutoyo America Corporation / Chicago USA
633 633 633 633
L
End Standard
Zero Cera Block
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Mitutoyo Institute of Metrology / Mitutoyo America Corporation / Chicago USA
633 633 633 633
L
End Standard
Zero Cera Block
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Mitutoyo Institute of Metrology / Mitutoyo America Corporation / Chicago USA
633 633 633 633
L
End Standard
Zero Cera Block
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Mitutoyo Institute of Metrology / Mitutoyo America Corporation / Chicago USA
633 nm
Wavelength of Helium-Neon Laser (and Fringe Lines)
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Mitutoyo Institute of Metrology / Mitutoyo America Corporation / Chicago USA
Test Model No. 1 632 991 382 fm
No. 2 632 991 412 fm
No. 3 632 991 379 fm
No. 4 632 991 331 fm
No. 5 632 991 388 fm
No. 6 632 991 381 fm
633 633 633 633 Wavelength of randomly selected
Laser Interferometers tested by Mitutoyo (was accurate within one picometer)
Nano
Pico Femto
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Mitutoyo Institute of Metrology / Mitutoyo America Corporation / Chicago USA
Is traceability to NIST required?
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Mitutoyo Institute of Metrology / Mitutoyo America Corporation / Chicago USA
Measurement Uncertainty (U) @ NIST, Washington, DC
50 mm End Standard = 31 nm
50 mm Line Standard = 8 nm
Temperature controlled = 0.005 C
°
In comparison, JIS standard “0.5” Grade = 0.5 C
°
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Mitutoyo Institute of Metrology / Mitutoyo America Corporation / Chicago USA
End Standard
G a g e B l o c k
0.577L
(Airy Point)
µ
Narrow Range accuracy calibrated at NIST for 50 mm was 0.1 m
50 mm
µ
Sealed Chamber: Temperature kept at: 0.005 C
°
Calibrated at NIST
0.05 C °
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Mitutoyo Institute of Metrology / Mitutoyo America Corporation / Chicago USA
m International System of Units (SI)
299 792 4xx m/s
299 910 xxx m/s
C = 299 792 458 m/s
1879 Michelson
1953 Michelson
1983 CIPM
(C = Speed of light in vacuum)
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Mitutoyo Institute of Metrology / Mitutoyo America Corporation / Chicago USA
s
m Unit of Length
Unit of Time
Accuracy of 1 Second: NIST–F2 Model (under development now)
0.000 000 000 000 000 001 1 Second error =Ten to the power of negative 18
SI
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Mitutoyo Institute of Metrology / Mitutoyo America Corporation / Chicago USA
Standard Temperature
23 25 20
°
C °
°
C
C
68 °
F At the turn of the last century, Johansson
calibrated his gage blocks at 20 degree C,
which was then the average machine shops
temperature in northern Europe.
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Mitutoyo Institute of Metrology / Mitutoyo America Corporation / Chicago USA
Standard Temperature
20
0.01
(in degree C)
29.76 Triple Point of
water Standard
Temperature
Melting point
of Gallium
International Temperature Scale (IT-90)
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Mitutoyo Institute of Metrology / Mitutoyo America Corporation / Chicago USA
Room Temperature
20
5
(in degree C)
35
The Definition of so-called “Room Temperature”
in accordance with JIS Standard Z 8703
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Mitutoyo Institute of Metrology / Mitutoyo America Corporation / Chicago USA
G a g e B l o c k
0.577L
(Airy Point)
Sir George Airy (1801-1892) Astronomer at Greenwich Observation Laboratory
End Standard
ZERO CERA BLOCK
“Step Gage” (Check Master) to calibrate CMMs
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Mitutoyo Institute of Metrology / Mitutoyo America Corporation / Chicago USA
Temperature is raised and lowered to study the effect of expansion
“The most accurate man is the man with the most accurate thermometer.” Ted Doiron, Metrologist, NIST
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Mitutoyo Institute of Metrology / Mitutoyo America Corporation / Chicago USA
Artifact Standard NMC Seminar in Singapore
Thank you,
Yours truly,