THE UNCERTAINTY OF PITCH AND YAW RE-EVALUATED FOR PRIMARY ROCKWELL HARDNESS STANDARD SYSTEM IN CMS

摘要

The Primary Rockwell Hardness Standard System was set up in the Center for Measurement Standards since July 1996 till June 1997. During the time, a laser interferometer, HP10737R 3-axis compact interferometer system was used to measure the effect of pitch and yaw of the Rockwell Hardness machine. As the laser interferometer was performed the measurement of the pitch and yaw of the indenter when the hardness was measured; then we evaluated the uncertainty caused from the Abbe's error through pitch and yaw measurements. In this paper, we will compare the results to the results of 2003 and to evaluate the aging effect of the indenter axis during seven years' used.