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A novel energy demand modelling approach for CNC machining based on function blocks
KTH, School of Industrial Engineering and Management (ITM), Production Engineering.ORCID iD: 0000-0001-8679-8049
2014 (English)In: Journal of manufacturing systems, ISSN 0278-6125, Vol. 33, no 1, 196-208 p.Article in journal (Refereed) Published
Abstract [en]

Energy efficiency remains one of the major issues in the machining domain. Today's machining systems are confronted with a number of new challenges, such as turbulent product demand and variations in production resources. Rapid and flexible energy modelling in a distributed and collaborative machining environment emerges as a new research area. Energy demand models in such an environment need to be practical, accurate, effective, scalable and reusable. Energy analysis and optimisation cannot be carried out once for all at the beginning. Instead, it is an on-going process. In this paper, the function block technique, i.e. IEC 61499, is used for the development of energy demand models as it brings advantages such as modularity, encapsulation, extensibility and reusability. A brief review on energy modelling and research on function blocks are given in the first part. A novel energy demand modelling approach based on function blocks is then proposed and elaborated. Three types of function blocks have been developed, i.e. machine tool dependent function blocks, state transition function blocks, and service interface function blocks. The first type, as the fundamental building blocks, is divided into two sub-types, machine component function block and machining state function block. Two case studies, based on a small 3-axis milling machine and an industrial production line respectively, are presented to demonstrate the possible applications using the function block-based model. Comprehensive discussions are given thereafter, including a pilot application of a distributed process planning system and a unique energy evaluation scheme. A confidence level associated energy rating system is proposed as the first step to turn energy consumption figures into useful indicators. The energy demand model based on function blocks developed here enhances the energy modelling and their practical implementations.

Place, publisher, year, edition, pages
2014. Vol. 33, no 1, 196-208 p.
Keyword [en]
CNC machining, Function block, Energy demand model, Energy efficiency, Energy ratings, Sustainable machining
National Category
Engineering and Technology
URN: urn:nbn:se:kth:diva-143738DOI: 10.1016/j.jmsy.2013.12.004ISI: 000331858000020ScopusID: 2-s2.0-84895059995OAI: diva2:708313
XPRES - Initiative for excellence in production research

QC 20140327

Available from: 2014-03-27 Created: 2014-03-27 Last updated: 2014-03-27Bibliographically approved

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Wang, Lihui
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