Pneumatic Measurement Approach for Form Tolerances of Inner Hole in Spool Valve

J. Liu; Guang Lin Wang

doi:10.4028/www.scientific.net/AMM.42.480

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Pneumatic Measurement Approach for Form Tolerances of Inner Hole in Spool Valve

Abstract:

Pneumatic measurement and genetic algorithm based approach for form tolerances, including the cylindricity error, circularity error and straightness error of axis, of inner hole in spool valve are studied in this paper. A differential pressure type of pneumatic comprehensive measurement approach is put forward, which applies the pneumatic nozzle scanning measurement principle. The minimum zone evaluation and calculation approach for form tolerances based on an improved genetic algorithm is presented considering the characteristics of the measuring point. Finally, the automatic measurement experiment is developed, which can simultaneously measure and evaluate the form tolerances of inner hole in one process.