The Study Of Tool Paths Automatic Generation Programing System In Numerial Control

Machining surface an important problem of modem NC manufacture which was describered clearly by traditional descriptive geometry and mechanical drawing But, as to traditional tool paths,including the method of offset curves the method of curvature catering the method of nonconstant offset for tool and so on, there are a few problems such as "fishnet" path on improving surfaces finish, besides ,it's irrational with respect to processing time and cost. Accordlingly, sculptured surfaces and rational method of tool path come to be key problems of surfaces machining.Gererally speaking, this thesis analysises and processes the space dominted point with dishevelled data chracter , sets up a three order B-spline surface on the data mentioned above, and oriented Hilbert curves in plate with vector in space , introduce it into the method of tool-path in machining sufacesThe main content is below:1, Disheveled processing based on database.2 Contructing of three order B-spline curves and displaying on computerthrough programming.3 Discovering the theory and methods of Hilbert curves vector methodand making it as a new way of tool-path to simulate to in computer . 4 Displaying the tool-path with Hilbertcurves on spherical suface and setting an example through programming.