Machining, Measurement, and Control Laboratory

Evaluation of Identification Accuracy of Copying Rate of Tool Motions with Measurement-Fused Machining System
Daisuke Kono, Atsushi Matsubara, Yusuke Koike and Iwao Yamaji

In order to investigate the copying characteristic of the tool motion to the workpiece profile, a measurement-fused machining system has been developed. The tool motion, the workpiece profile measured on the machine and with a measuring machine are compared in shaping with several sets of a tool and a workpiece material. The accuracy of the on-machine measurement system is also evaluated. When the sine-sweep profile with the wavelength of 2-0.5 mm is fabricated with the single crystal diamond tool, the workpiece profile on the electroless plated nickel and the aluminum alloy correspond to the tool motion in sub-micrometer level. In the developed measurement-fused machining system, the detection limit of the geometrical error due to the copying characteristic is from 0.5 to 1 um. Measurement error of the on-machine measurement is larger when the aluminum alloy is selected as the workpiece or the poly crystal diamond tool is used.
Key Words: Copying characteristic, On-machine measurement, Tool motion, Workpiece profile, Measurement-fused machining system