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Proceedings Paper

The Rockwell hardness primary national machine according to the new international definition
Author(s): Li He; Feng Zhang
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Paper Abstract

According to the new definition of Rockwell hardness given by the International Working Group on Hardness (WGH), the new Rockwell hardness national primary standard machine in the National Institute of Metrology is presented in this paper. A tooth-belt is used to reduce the vibration. The loading monitor system, the PLC control system and the laser measuring system are designed to raise the measuring precision. Experiments show that the Rockwell hardness standard machine based on this method can meet the requirements of the new definition and accomplish a high stability and measuring precision.

Paper Details

Date Published: 16 November 2011
PDF: 8 pages
Proc. SPIE 8321, Seventh International Symposium on Precision Engineering Measurements and Instrumentation, 83211I (16 November 2011); doi: 10.1117/12.904619
Show Author Affiliations
Li He, National Institute of Metrology (China)
Feng Zhang, National Institute of Metrology (China)


Published in SPIE Proceedings Vol. 8321:
Seventh International Symposium on Precision Engineering Measurements and Instrumentation
Kuang-Chao Fan; Man Song; Rong-Sheng Lu, Editor(s)

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