Research on Precision Measurement and Fitting Method for Sliding-Shoe’s Inferior Concave Spherical Surface
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.
Chunliang Zhang and Paul P. Lin
W. G. Zheng et al., "Research on Precision Measurement and Fitting Method for Sliding-Shoe’s Inferior Concave Spherical Surface", Applied Mechanics and Materials, Vols. 226-228, pp. 1817-1820, 2012