1、 PDF外文：http:/ 5140 字 毕业设计（论文）外文翻译 课题名称 &nb
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5、; - 1 - Laboratory for Manufacturing and Sustainability UC Berkeley Title: Energy Consumption Characterization and Reduction Strategies for Milling Machine Tool Use Author: Diaz, Nancy, University of California, Berkeley Dornfeld, David, U
6、C Berkeley Publication Date: 05-04-2011 Series: Green Manufacturing and Sustainable Manufacturing Partnership Publication Info: Green Manufacturing and Sustainable Manufacturing Partnership, Laboratory for Manufacturing and Sustainability, UC Berkeley Permalink: http:/escholarship.org/uc/item/40g995
7、w6 Keywords: Green Machine Tools； Energy Consumption Reduction； Specific Energy Characterization Abstract: Since machine tools are used extensively throughout their functional life and consequently consuming valuable natural resources and emitting harmful pollutants during this time, this study revi
8、ews strategies for characterizing and reducing the energy consumption of milling machine tools during their use. The power demanded by a micro-machining center while cutting low carbon steel under varied material removal rates was measured to model the specific energy of the machine tool. Thereafter
9、 the power demanded was studied for cutting aluminum and polycarbonate work pieces for the purpose of comparing the difference in cutting power demand relative to that of steel. &nb
10、sp; eScholarship provides open access, scholarly publishing services to the - 2 - University of California
11、 and delivers a dynamic research platform to scholars worldwide. Energy Consumption Characterization and Reduction Strategies for Milling Machine Tool Use Nancy Diaz， Elena Redelsheimer， David Dornfeld， Laboratory for Manufacturing and Sustainability， University of California at Be
12、rkeley, USA Abstract Since machine tools are used extensively throughout their functional life and consequently consuming valuable natural resources and emitting harmful pollutants during this time, this study reviews strategies for characterizing and reducing the energy consumption of
13、milling machine tools during t heir use. The power demanded by a micromachining center while cutting low carbon steel under varied material removal rates was measured to model the specific energy of the machine tool. Thereafter the power demanded was studied for cutting aluminum and polycarb o
14、nate work pieces for the purpose of comparing the difference in cutting power demand relative to that of steel. Keywords: Green Machine Tools； Energy Consumption Reduction；Specific Energy Characterization 1 INTRODUCTION A product undergoes three life-cycle sta
15、ges: manufacturing, use and end-of-life. Consumer products whose environmental impact is dominated by the use phase include light fixtures, computers, refrigerators, and vehicles, in general products that are used extensively during their functional life. All the while these products con
16、sume resources, in particular energy in the form of electricity or fuel. The machine tool is one such product. The use phase of milling machine tools has been found to comprise between 60 and 90% of CO2-equivalent emissions during its life cycle 1. This study presents a method for predicting the ele
17、ctrical energy consumed in manufacturing a product for the purpose of reducing its environmental impact. In conducting a life cycle assessment, product designers may choose to opt for a process, economic input-output (EIO), or hybrid approach. The drawback of the process LCA, tho
18、ugh, is that because this method entails acquiring process-specific data it is time consuming and therefore resource intensive. An alternative to measuring the machine tool s electrical energy consumption directly, for example, is to use aggregate data as is done with EIO-LCA 2. An EIO-L
19、CA, therefore, is not specific to the design of a particular product. The strategies presented herein provide a method for more quickly generating manufacturing energy consumption estimates for a particular product. 1.1 Cutting load profile As described by Diaz et al. in 3
20、the power demand of a machine tool is comprised of cutting, variable, and constant power components. The cutting power is the additional power drawn for the removal of material. The machine tool used in this analysis, the Mori Seiki NV1500 DCG, is a micro-machining center with a relatively low standby power demand when compared to large machining centers. Therefore, the cutting power can comprise a large portion of the machine tool s
