Abstract
This study presents an object oriented approach for the development of a process planning system for axis symmetric rotational components. The system consists of two modules: Part design data and manufacturing data input module and Object oriented process planning module (OOPP). Part data input module is created in customised AutoCAD environment. All the information about the input in the AutoCAD can be exported as DXF output file. DXF output file is automatically postprocessed in OOPP module to create object classes according to the input from this module. These classes are used by the sub modules: e.g., extraction of machinable volumes, setup planning, sequencing of operations, machine selection, tool selection and machining time calculation.
Highlights
In view of the rapidly developing international competition in the world of manufacturing, one must utilize the most modern manufacturing technologies in order to keep pace
For further increase of productivity and reduction of cost integration of Computer aided design (CAD) and computer aided manufacturing (CAM) is necessary which leads to computer integrated manufacturing (CIM)
The input module is based on customized AutoCAD whereas the computer aided process planning (CAPP) module is written in C++ using object oriented programming concepts
Summary
In view of the rapidly developing international competition in the world of manufacturing, one must utilize the most modern manufacturing technologies in order to keep pace. Computer aided design (CAD) and computer aided manufacturing (CAM) have become a standard for improving productivity. For further increase of productivity and reduction of cost integration of CAD and CAM is necessary which leads to computer integrated manufacturing (CIM). Underlying technologies, which make CIM feasible, are already available, but several building blocks are still missing One such building block is automated process planning. Chang and Wysk (1985) define process planning as an act of preparing detailed operation instructions to transform an engineering design into a final product. CAPP arena has long been dominated by artificial intelligence techniques e.g., expert system (Chang, 1990). These suffer from the disadvantage of duplication, requirement for large database that makes the system implementation difficult. This paper presents an object oriented CAPP system for rotational parts
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