Method for establishing data defining tool path for rough machining
AssigneeSony Corporation
InventorsJun Sawamura, Tetsuzo Kuragano
Life of this patent
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Abstract
In a method for generating data defining the machining depth along a tool path, grid points are generated according to split points indicating a form of a model, and rough machining data for contour milling is generated according to the grid points, so that rough machining data which presents overcutting can be prepared. Contour points are generated and drilling points are set according to a comparison with cut planes so that the drilling points can be set easily and automatically. The contour points are retrieved successively so as to easily generate a tool path for contour milling.
Claims8
A method for generating data defining a machining depth along a tool path for a numerically controlled machine of a type having a machining tool of a known configuration including a mill for contour milling and a drill, using form data defining a three-dimensionally curved surface, comprising the steps of:
- selecting a plurality of split points which indicate roughly a three-dimensionally curved surface according to the form data;
- selecting a plurality of grid points which are evenly spaced in the horizontal direction at a predetermined pitch so as to form a rectilinear grid;
- calculating depth data for each of the split points which indicates the height of the three-dimensionally curved surface in a circular region surrounding each split point having a radius equal to the radius of the mill to prevent an overcutting in a depth direction;
- and
- generating rough machining data for contour milling by comparing the depth data of the plurality of split points and predetermined depth values of a plurality of cut planes.
A method for rough machining a workpiece of material into a desired shape with a numerically controlled machine tool having a mill for contour milling and a drill, using form data defining a three-dimensional curved surface, comprising the steps of:
- selecting a plurality of split points which indicate roughly a three-dimensional curved surface according to the form data;
- selecting a plurality of grid points which are evenly spaced in the horizontal direction at a predetermined pitch so as to form a rectilinear grid;
- calculating depth data for each of the split points which indicates the height of the three-dimensionally curved surface in a circular region surrounding each split point having a radius equal to the radius of the mill to prevent an overcutting in a depth direction;
- generating rough machining data for contour milling by comparing the depth data of the plurality of split points and predetermined depth values of a plurality of cut planes;
- and
- contour milling the workpiece in accordance with the rough machining data.
Dependencies are inferred from the claim text.