Keyhoon Ko

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As high-speed machining and unmanned machining become common, the demand for cutting-load regularization increases, so NC machining can be more ef®cient. To be presented is a simple cutting-load regularization method for pocket machining. As the conventional off-line approaches where cutting-load is predicted and cutting parameters are adjusted before(More)
Presented in the paper is a C-space based computer automated process planning (CAPP) algorithm for freeform die-cavity machining, which is an extension of the hierarchical CAPP model proposed earlier by the authors. In order to demonstrate its validity, the proposed CAPP algorithm has been implemented and applied to actual die-cavity machining examples. q(More)
In a typical FAB factory, various types of products are produced around the clock. Complex constraints and re-entrant flows make it difficult for a human scheduler to generate a production schedule based on his/her experience and knowledge. This paper introduces a simulation based FAB scheduler, SeePlan®, which was developed by the authors. A Korea based(More)
In the FAB industries, key objectives of planning and scheduling might be 1) to meet the due date, 2) reduce the cycle time and 3) maximize machine utilization. MozArt has played a vital role in achieving the goals mentioned above in Korean semiconductor and display manufacturers. Its backward planning (pegging) engine finds the progress for each demand,(More)
In a typical FAB factory, various types of products are produced around the clock. Complex constraints and re-entrant flows make it difficult for a human scheduler to generate a production schedule based on his/her experience and knowledge. This paper introduces a simulation based FAB scheduler, SeePlan®, which was developed by the authors. A Korea(More)
To control the production schedule for mold making, it is important to collect the actual results of machining operations, yet machine operators seldom record the results. Some die and mold shops have constructed a system which interfaces with NC controllers and which identifies the status of the machining operation from signals. This method depends totally(More)
Diversified and complicated manufacturing sites make optimal scheduling of production lines difficult. Under current manufacturing processes, it is almost impossible for schedulers to consider all the constraints of production processes. A strategy of simulation-based advanced planning and scheduling (APS) is employed to overcome difficulties that interfere(More)
In a typical FAB factory, various types of products are produced around the clock. Complex constraints and re-entrant flows make it difficult for a human scheduler to generate a production schedule based on his/her experience and knowledge. This paper introduces a simulation based FAB scheduler, SeePlan®, which was developed by the authors. A Korea(More)
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