Design of an on-machine gauge for diameter measurements

Kevin G. Harding; Eric J. Sieczka; Eric Anthony Kaltenbacher; Albert J. Boehnlein

doi:10.1117/12.145560

28 May 1993 Design of an on-machine gauge for diameter measurements

Kevin G. Harding, Eric J. Sieczka, Eric Anthony Kaltenbacher, Albert J. Boehnlein

Proceedings Volume 1821, Industrial Applications of Optical Inspection, Metrology, and Sensing; (1993) https://doi.org/10.1117/12.145560
Event: Applications in Optical Science and Engineering, 1992, Boston, MA, United States

Abstract

The measurement of part diameters is an important factor in metal turning operations, increased production demands have suggested the use of methods that adjust subsequent cuts depending on the previous operations. This paper describes the design of a laser based gage made specifically for measuring parts on the machine tool to a high accuracy. The tri-beam gage uses three beams of light to measure the local curvature of the part in a manner similar to a V-block gage. The diffraction of the light beams that touch the sides of the part are sensed by a detector array. The distinctive diffraction pattern is correlated to locate the edge of the shadow to a very high precision. The properties of this design include: calibration that is independent of the machine tool scales, non-contact damage free operation, high speed of measurement, low cost of the gage, and the ability to measure parts in motion. This paper will describe the design considerations of this gage including issues of design angle of the V, light source coherence, thermal drift, noise effects, stability, and accuracy.

Citation Download Citation

Kevin G. Harding, Eric J. Sieczka, Eric Anthony Kaltenbacher, and Albert J. Boehnlein "Design of an on-machine gauge for diameter measurements", Proc. SPIE 1821, Industrial Applications of Optical Inspection, Metrology, and Sensing, (28 May 1993); https://doi.org/10.1117/12.145560

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