Cylindricity Error Measurement and Evaluation Based on Step Acceleration Algorithm in Crankshaft Measuring Machine

• Published in: MĀPAN : journal of Metrology Society of India 2022-12, Vol.37 (4), p.823-832
• Main Authors: Wang, Ya-Xiao, Wang, Hong-Xi, Tian, Hui-Hui
• Format: Article
• Language: English
• Subjects: Algorithms; Crankshafts; Error analysis; Error detection; Evaluation; Mathematical and Computational Physics; Mathematical Methods in Physics; Measurement Science and Instrumentation; Measuring instruments; Numerical and Computational Physics; Optimization; Optimization algorithms; Original Paper; Physics; Physics and Astronomy; Simulation; Theoretical; Uncertainty analysis
• ISSN: 0970-3950; 0974-9853
• DOI: 10.1007/s12647-022-00556-3

In the process of developing the vertical crankshaft comprehensive measuring instrument, owing to the problems of complex calculation and low efficiency of the existing crankshaft main journal cylindricity evaluation algorithm, a cylindricity error optimization algorithm based on step acceleration is proposed. As per the requirement of a measuring device of crankshaft, a mathematical model for evaluating cylindricity error is also proposed, and the cylindricity error in crankshaft journal with minimum assessment requirement is calculated by the step acceleration based optimization algorithm. Then, a certain type of engine crankshaft is taken as an object for detecting the main journal cylindricity error using the proposed new algorithm on the platform of a vertical crankshaft comprehensive measuring machine, and the measurement uncertainty analysis is performed. Compared to Talyrond290, the detection error of the measurement results is found to be within 0.5 um. In comparison with the geometric hexagon cylinder optimization algorithm, the results of the proposed methodology are found to be highly consistent and the computation time is reduced by 27.8%. Therefore, the proposed algorithm is practical.