A Measurement and Analysis Technique of Curves of Metal Parts

Abstract:

Metal parts with large and complicated curved surfaces used widely have some characteristics such as a great volume, a big area, distorting easily. It is very difficult to measure and evaluate accurately the parts. Taking measurement of the parts as a purpose, a new measurement method called On-Line Shape Measurement System (OSMS) is put forward.Error analysis of curves is a requirement to assure quality and to reduce manufacturing costs and rework. This paper proposes a new approach and algorithms for the error analysis of curves.the system applies a robust mathematic model, Implicit polynomials (IP), to construct the model of the test-points. Once the CAD model is adjusted, it is compared with input to reveal the errors between their shapes. To accomplish this task a new shape matching algorithm is developed. Experimental results on error analysis of a variety of the machined metal skin of aircraft are reported to show the validity of the proposed methodology.

• Periodical: Advanced Materials Research (Volumes 424-425)
• Pages: 665-668
• DOI: https://doi.org/10.4028/www.scientific.net/AMR.424-425.665
• Online since: January 2012
• Authors: Wei Shao, Deng Xin Hua
• Keywords: Curves, Inspection, Metal Parts, Shape Error Analysis

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