10 September 2009 In-process inspection of internal threads of machined automotive parts
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This paper presents a methodology for the non-contact inspection of geometric features of internal threads in machined automotive parts. The method enables in-process internal thread quality verification using a high-precision laser sensor. It allows extracting thread pitch, major and minor diameters, thread height and even allows finding the angular location of the starting point of a thread with respect to a reference point on the perimeter. An in-process thread inspection prototype possessing five axes of motion is presented to demonstrate the capabilities of this method. The validation of this method and the self-calibration approach for system alignment were tested on several internal threads showing a high degree of repeatability.
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Hongwei Zhang, Hongwei Zhang, Reuven Katz, Reuven Katz, John S. Agapiou, John S. Agapiou, } "In-process inspection of internal threads of machined automotive parts", Proc. SPIE 7432, Optical Inspection and Metrology for Non-Optics Industries, 74320D (10 September 2009); doi: 10.1117/12.824387; https://doi.org/10.1117/12.824387

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