Abstract
In this paper, the characteristics and design rules of piston skirt middle-convex ellipse surface are studied, and the piston skirt profile mathematical model was established. Piston skirt middle-convex curve is interpolated based on MATLAB, and the piston middle-convex surface was generated according to the theory of surface modeling; the piston skirt transversal section was controlled based on Pro/E curvilinear equation, and then the piston skirt surface was created. The example indicates that commonality and fitting precision of these two design methods are excellent, so it has the better application value of project.
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