Improvements in production equipment through a total life-cycle consideration
Başlık çevirisi mevcut değil.
- Tez No: 401876
- Danışmanlar: DR. PINAR BİLGE, PROF. DR. GÜNTHER SELİGER
- Tez Türü: Yüksek Lisans
- Konular: Ekonomi, Enerji, İşletme, Economics, Energy, Business Administration
- Anahtar Kelimeler: Belirtilmemiş.
- Yıl: 2013
- Dil: İngilizce
- Üniversite: Technische Universität Berlin
- Enstitü: Yurtdışı Enstitü
- Ana Bilim Dalı: Belirtilmemiş.
- Bilim Dalı: Belirtilmemiş.
- Sayfa Sayısı: 69
Özet
Özet yok.
Özet (Çeviri)
As manufacturing industries are searching for new ways to improve their production efficiencies and profitability due to excessive use of natural resources and increase in production costs due to increased demand, sustainability present a significant solution for the needs of industries by providing improvements in economic, environmental and social aspects [Klo-09]. Production equipment plays a key role in profitability of manufacturing industries like machining sector in which they are being used in a wide range of processes. Regarding ecological awareness and cost saving issues, manufacturing of production equipment needs to be developed with regards to sustainable values. In this thesis, these developments are achieved through a total life-cycle consideration, which provides a developed framework for sustainable manufacturing of production equipment in order to create sustainable value in machining industry. According to sustainability values, innovation in production equipment, decrease in costs and large-scale new business opportunities through total life-cycle implementations are objected in economic aspects. In addition decreases in excessive use of resources and cleaner air, soil, water and eco-balance are objected in environmental aspects. Finally, improved health quality, safety and enhanced quality of life are objected in the social aspects of sustainability [Jaw-08]. In this study, as a significant example of production equipment, cutting tools are investigated through total life-cycle methodology. By figuring out the current state value stream mapping for cutting tools, the production processes of these production equipment are defined and then, these production processes are evaluated according to three metrics of waste generation, carbon impact and production cost rates. As a result of sustainability evaluation, influence processes of blending, mixing/granulating, grinding, coating and heat treatment, which have the highest impact on sustainability of cutting tools, are determined. In order to achieve improvements through total life-cycle methodology, a closed-loop life-cycle model for cutting tools is introduced by considering four stages of product life-cycle as pre-manufacturing, manufacturing, use and post-use. The influence processes that were determined in sustainability assessment were contributed to generate a developed post use stage in this closed-loop which utilizes improvements for all three metrics of was generation, carbon impact and cost rates. Regrinding, recoating, de-coating and recoating processes were constituted the remanufacturing of cutting tools and heat treatment process was also modified to be used for recycling of the cutting tools. Blending and mixing processes were aimed to be not repeated after the first life-cycle of the cutting tools in order to reduce total carbon impact. With the consideration of cutting tools through total-life cycle concept, remanufacturing and recycling of cutting tools were achieved. Improvements through the total life-cycle consideration have been measured according to the remanufacturing of the cutting tools. By introducing cutting tool remanufacturing concept, all three performance metrics have been improved in remanufactured cutting tools in comparison to new ones. With the total life-cycle consideration for cutting tools, amount of waste generation has decreased approximately by 23% [Nat-04], carbon impact has reduced nearly by 50% [Kar-09] and total production costs have declined by 66% [Pla-09] [Byr-03] in remanufactured cutting tools in comparison to new ones. Finally, the sustainable improvements obtained for the cutting tools show that, regarding economic, environmental and social dimensions of sustainability, all types of production equipment is capable of being improved by 6R concepts through a total life-cycle consideration which creates sustainable value in machining industry. Furthermore, with sustainable improvements not only in machining industry but also in other industries, a green world, as being the most important heritage for today, will be conveyed to next generations in future.
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