In-Process Diameter Measurement of Turned Workpiece With Curvatures by Using Sensor Positioning

[+] Author and Article Information
Masatake Shiraishi, Hideyasu Sumiya, Shinichi Aoshima

Faculty of Engineering, Ibaraki University, 12-1 Nakanarusawa 4 chome Hitachi, Ibaraki 316-8511, Japan

J. Manuf. Sci. Eng 128(1), 188-193 (Jun 17, 2005) (6 pages) doi:10.1115/1.2122967 History: Received February 19, 2005; Revised June 17, 2005

A modified triangular laser displacement sensor having a resolution of 1.0μm was used to measure the diameter of a turned workpiece with curvatures. This sensor was attached to a specially designed stage mounted on a precision slide unit and operated by three drive motors. In the measurement, the laser sensor was controlled by a θ motor depending on workpiece curvatures so that the illuminating laser beam is always normal to the part surface and can measure the workpiece diameter in an on-line fashion. This sensor positioning control was found to be effective for measuring the diameter of a curved workpiece with an accuracy of several micrometers.

Copyright © 2006 by American Society of Mechanical Engineers
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Figure 1

Measurement method by the modified laser displacement sensor

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Figure 2

Relation between workpiece and laser beam

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Figure 3

Optical layout for simulation

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Figure 4

Intensity distribution of the circular pattern image

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Figure 5

Characteristics of the laser displacement sensor

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Figure 6

Measuring procedure of diameter

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Figure 7

Experimental setup

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Figure 8

Experimental results I

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Figure 9

Experimental results II



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