Tool profile design for the mold for machining the bush of cone screw seawater hydraulic pump

Abstract

Design method of the tool profile for machining the mold was found to facilitate the casting or extrusion of the bush of cone screw seawater hydraulic pump within this paper. Mathematical expression of the theoretical tool profile was established, as well as equation of the contact line between mold and tool surface, based on meshing theory and coordinate transformation theory. As solving contact condition involves implicit functions and trigonometric functions, only with methods of numerical discretization analysis by using the fzero function to solve single-variable nonlinear equations, can the contact line trajectory and theoretical curve of tool profile be obtained quickly and accurately. The tool profile design for manufacturing the mold lays a foundation for the processing of pump bush.