科研之友
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摘要
Parts or products can be considered as the carrier of energy consumption during manufacturing since they are the final output of workshops. The concept of "embodied energy" is presented as a feasible indicator to characterize the energy consumption of a part or a product. Previous work mainly discussed methods and technologies to apply the embodied energy of parts for selecting materials and processes in product design; the role that embodied energy of parts can play in production optimization was seldom investigated. In addition, different from machining workshops, which has been widely discussed, there is less research on energy saving in the sheet metal forming workshop. In this paper, modeling and application of embodied energy for energy saving in the sheet metal forming workshop is presented. The embodied energy of parts during the manufacturing phase (EEPM) is modeled. The EEPM is evaluated by discrete event simulation to identify energy distribution, energy-intensive processes, and bottlenecks (e.g., processes with feed blocking, machines with low utilization, and others) during production. Energy-oriented scheduling in the workshop is implemented, and a two-stage approach based on ranks of EEPM that can quickly select more efficient production solutions is proposed. A case in a stamping workshop of a partner company validates the proposed methods. This study provides a practical approach to seek a trade-off between energy saving and high production efficiency for energy-intensive discrete workshops.
