In this paper, a computer integrated manufacturing system has been established. The integration ofthe CAD/ CAM/CAPP is applied to smooth the design and manufacturing process of rotational parts.The CSG model is adopted to construct the solid geometry. The same part data is used in all of theCAD, CAM and CAPP modules. The basic primitives, such as the cylinder and the cone features, areused to build the main shape of the part The manufacturing features, such as the groove and thethread, are attached to the corresponding primitives to modify the local shapes and add the high levelmanufacturing information effectively and efficiently. The smoothing operation of two adjacentprimitives has been proposed to determine the correct dimensions of two connected primitives withtangential continuity. A feature recgonition algorithm has been proposed to convert the wire frameentities to CSG primitives. A GT code system and a process weighting method are proposed torecognize the part and generate the corresponding process plan. Algorithms for planning the cutterpath and calculating the cutter locations have been proposed to generate the NC programmeautomatically. Cutting path simulation and cutting process animation are supplied in the proposedsystem to verify the CAM functions. Examples and the cutting experiment are given to demonstrateand verify the proposed CAD/CAM/ CAPP integration system.
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