A Steel Tube Production Planning and Scheduling with Product-dependent Changeover Time Using Digital Twin
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Abstract
Steel tube manufacturing industry is one of heavy industry that use a lot of labor, large and heavy machineries, intense capital, and high technologies. The production planning and scheduling of steel tube manufacturing is complicated because of a long tool setup time and machine conditions. Moreover, there are half-thousands of different finished goods. In order to produce efficiently and maximize machine utilization, this paper proposes a digital twin of steel tube production process focus on forming process. The digital twin could be used for planning and scheduling to manage complexity of machinery setup, priorities production, fulfil inventory without shortage and to conduct what-if analysis and compares for the scenarios of different schedules. The digital twin provides production model simulating precise production total time, tool setup time, number of products and production deadline. The simulation model is tested with forty-nine products on three identical machines with their tool setup time. It reduces the production planning time of the planning engineer and provides accurate schedule of each product.
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