Research on Precision Measurement and Fitting Method for Sliding-Shoe’s Inferior Concave Spherical Surface

Abstract:

Due to the presence of nonlinear springback deformation, when the aviation piston hydraulic pump which is usually called sliding-shoe is formed by cold extrusion method, the surface of the sliding-shoe’s ball-socket becomes non-analytic curved surface. And this brings many difficulties to the measurement. In this paper, the precision measurement and fitting method to the inferior concave spherical surface of the sliding-shoe is discussed. And according to the deformation characteristics of the sliding-shoe, a meridian measurement method is established for the measurement. To a large number of discrete data, we fit it by least squares method and calculate it by VC++ Language program. Then we get the ball-socket’s center and radius. And fitting the sliding-shoe’s ball-socket to find out the contour error. It provides a reliable basis for the inspection of sliding-shoe.

• Periodical: Applied Mechanics and Materials (Volumes 226-228)
• Pages: 1817-1820
• DOI: https://doi.org/10.4028/www.scientific.net/AMM.226-228.1817
• Online since: November 2012
• Authors: Wei Gang Zheng, Chao Tang, Ming Dai, Hai Bo Huang, Xiao Xiao Ma
• Keywords: Inferior Concave Spherical Surface, Least-Square Method (LSM), Meridian Measurement, Surface Fitting

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