Browsing by Author "Ssemakula, M.E."
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Item Automatic Generation of NC Part Programs.(1988) Ssemakula, M.E.; Sivac, P.O.; ISRMost CAD/CAM systems available today are capable of generating NC part programs to machine a component designed on the system. This achieves apparent integration between CAD and CAM. However, the user must still manually enter crucial manufacturing data such as cutting conditions, tooling and machine information. An automated process-planning system would have the capacity to provide this information directly. This paper describes one such system which generates a process plan and, automatically, the NC part program and can therefore be used as the basis of true integration between CAD and CAM.Item CAD/CAPP Integration using IGES.(1988) Ssemakula, M.E.; Gill, Jaipal S.; ISRThis paper describes an approach to the integration of a process planning system (ICAPP) to a CAD system. The link is established through the Initial Graphics Exchange Specification (IGES) used to transfer the feature geometric data from the CAD system to the ICAPP system. The ICAPP system can subsequently use this geometric data in generating a detailed process plan for the manufacture of the part as well as a part program in either APT or COMPACT II, thus constituting truly integrated part design and manufacture.Item Functional Design of an Integrated CIM System at the Facility Level.(1988) Harhalakis, George; Ssemakula, M.E.; Johri, A.; ISRComputer Integrated Manufacturing (CIM) is often understood as simply the integration of CAD and CAM. In fact it is much more than this. It is the systems approach of linking together the various automation tools available today, so as to enable the control of an entire manufacturing operation, as well as related business functions. Unlike most of the recent research in CIM, we are not addressing the integration of hardware and software on the shop floor. Instead, we consider that Manufacturing Resource Planning (MRP-II), has the best inherent features for the linking of the various high level manufacturing functions. In this wor^, integration centers around parts specifications, routings and the workcenters in the system. A model for this integration at the facility level, is presented along with the rules of interaction between the systems. The model is based on-the principle of database interoperability, and will use a formal language named 'Update Dependencies' for the implementation.Item Integration of Computer Aided Design and Computer Aided Process Planning.(1985) Ssemakula, M.E.; ISRIn recent years, CAD/CAM systems have gained wide acceptance in industry. As experience in the use of these systems builds up, it is becoming increasingly evident that for most effective operation, they must be integrated. Process Planning, being responsible for the conversion of design speciflcation to manufacturing instructions, is essential to this integration process. Research is being conducted to enable geometric data trom a CAD database to be accessed by process planning programs for use in generating appropriate process plans for a given part. The resulting process planning data is then translated into an NC program which can be used to machine the part.Item Optimal Process Sequencing in CAPP Systems.(1988) Ssemakula, M.E.; Nau, D.S.; Rangachar, R.M.; Yang, Q.; ISRAutomated Process Planning forms an important link in CIM Systems. Process Sequencing is one of the most important phases of process planning and is influenced by factors such as part geometry, available manufacturing resources and generated cutting forces. This paper describes a new AI based approach to optimizing this function using heuristic search techniques.Item The Prospects of Process Sequence Optimization in CAPP Systems.(1987) Ssemakula, M.E.; Rangachar, R.M.; ISRAutomated Process Planning forms an important link in the integration of CAD and CAM systems. This paper gives an overview of the main types of computerized process planning systems. It demonstrates that part geometry, available machines and cutting tools as well as required cutting forces are the important factors that influence sequencing of the required machining processes. The paper analyzes feasible method for process sequence optimization, which is an important part of process sequencing.Item The Role of Process Planning in the Integration of CAD/CAM Systems.(1987) Ssemakula, M.E.; ISRIn recent years CAD/CAM systems have gained wide acceptance in industry both in the U.S. as well as her major competitors in Europe and Japan. As experience in the use of these systems builds up, it has become increasingly evident that for them to operate most effectively, they must operate in an integrated way. This paper looks at the continuing drive to attain fully integrated CAD/CAM systems and explains the key role that process planning has to play in this endeavor.