Author:

Keywords:

cad/cam, process and production planning, Science & Technology, Technology, Engineering, Multidisciplinary, Engineering, Manufacturing, Nanoscience & Nanotechnology, Instruments & Instrumentation, Engineering, Science & Technology - Other Topics, dimensional metrology, CMM, temperature variations, differential expansion, measurement errors, 02 Physical Sciences, 09 Engineering, 10 Technology, Industrial Engineering & Automation, 40 Engineering, 51 Physical sciences

Abstract:

Industrial quality demands have resulted in increasing attention towards the thermal behavior of coordinate measuring machines. The influence of the workpiece on the measurement accuracy is hereby often disregarded. This can lead to significant measurement errors. The described research examines the interaction between the measurement device and the measured object. Four distinct measurement error types that result from non-standard temperatures are listed. Temperature variations during the measurement lead to the most challenging situation. The key to measurement accuracy lies in linking the measurement time to the accompanying temperature variation. The possibilities of this methodology are indicated by an experiment on a reference object. © 2001 Elsevier Science Inc. All rights reserved.