Subtractive versus mass conserving metal shaping technologies: an environmental impact comparison

Abstract The scientific studies in the domain of environmental sustainability of metal processing technologies predominantly focus on conventional material removal processes, as milling and turning. Despite some exceptions, many other non-machining technologies, such as metal forming processes, are still not well documented in terms of their energy and resource efficiency. Moreover, to properly evaluate the environmental impact of a given process, a standing-alone approach is no longer sufficient. In order to offer a valuable contribution in the domain of metal shaping sustainability, the present paper proposes a thorough methodology entailing to compare, from the environmental point of view, two traditional technologies: a hot extrusion process (mass conserving approach) and a turning (subtractive) one. A Life Cycle Assessment (LCA) based approach is implemented to properly analyze the considered processes. An axi-symmetric aluminum component was selected to develop the analysis on. Besides the analysis of material flows occurring all along the life cycle of the component, the material use and the consumed electrical energy necessary for the tools manufacturing are measured to properly quantify the environmental impact of the production phases. The most relevant influencing factors within each technology are identified and quantified. Moreover, an analysis of the environmental performance of the two processes at the varying of the batch size is presented. The paper aims at providing some general guidelines for the identification of the greenest technology as the main influencing factors change.

[1]  Joost Duflou,et al.  A Comprehensive Analysis of Electric Energy Consumption of Single Point Incremental Forming Processes , 2014 .

[2]  C. Herrmann,et al.  Determining optimal process parameters to increase the eco-efficiency of grinding processes , 2014 .

[3]  Paul Mativenga,et al.  Modelling of direct energy requirements in mechanical machining processes , 2013 .

[4]  J. Sharma,et al.  Investigation of effects of dry and near dry machining on AISI D2 steel using vegetable oil , 2014 .

[5]  Arpad Horvath,et al.  Green Manufacturing and Sustainable Manufacturing Partnership Title Environmental Analysis of Milling Machine Tool Use in Various Manufacturing Environments , 2022 .

[6]  William Z. Bernstein,et al.  Environmental assessment of laser assisted manufacturing: case studies on laser shock peening and laser assisted turning , 2010 .

[7]  Barbara Linke,et al.  Sustainability of abrasive processes , 2013 .

[8]  Imtiaz Ahmed Choudhury,et al.  Evaluation of vegetable and mineral oil-in-water emulsion cutting fluids in turning AISI 4340 steel with coated carbide tools , 2014 .

[9]  Wim Dewulf,et al.  Improvement Potential for Energy Consumption in Discrete Part Production Machines , 2007 .

[10]  Wim Dewulf,et al.  Methodology for systematic analysis and improvement of manufacturing unit process life cycle inventory (UPLCI) CO2PE! initiative (cooperative effort on process emissions in manufacturing). Part 2: case studies , 2012, The International Journal of Life Cycle Assessment.

[11]  Paul Xirouchakis,et al.  Evaluating the use phase energy requirements of a machine tool system , 2011 .

[12]  Renaldi Renaldi,et al.  Environmental impact modeling of selective laser sintering processes , 2014 .

[13]  Ian A. Ashcroft,et al.  Transparency Built‐in , 2013 .

[14]  Sami Kara,et al.  Unit process energy consumption models for material removal processes , 2011 .

[15]  Paolo Nava,et al.  Minimizing Carbon Emissions in Metal Forming , 2009 .

[16]  Renaldi Renaldi,et al.  Resource Efficiency in Manufacturing: Identifying Low Impact Paths , 2012 .

[17]  Gianni Campatelli,et al.  Optimization of process parameters using a Response Surface Method for minimizing power consumption in the milling of carbon steel , 2014 .

[18]  Bilgin Tolga Simsek,et al.  Optimization of cutting fluids and cutting parameters during end milling by using D-optimal design of experiments , 2013 .

[19]  Timothy G. Gutowski,et al.  An Environmental Analysis of Machining , 2004 .

[20]  Fernando Gomes de Almeida,et al.  Improving the environmental performance of machine-tools: influence of technology and throughput on the electrical energy consumption of a press-brake , 2011 .

[21]  Rajesh Kumar Bhushan,et al.  Effect of machining parameters on surface roughness and tool wear for 7075 Al alloy SiC composite , 2010 .

[22]  Paul Mativenga,et al.  Sustainable machining: selection of optimum turning conditions based on minimum energy considerations , 2010 .

[23]  Rajesh Kumar Bhushan,et al.  Optimization of cutting parameters for minimizing power consumption and maximizing tool life during machining of Al alloy SiC particle composites , 2013 .

[24]  Steven J. Skerlos,et al.  Environmental aspects of laser-based and conventional tool and die manufacturing , 2007 .

[25]  Mohammed A. Omar,et al.  Life cycle assessment-based selection for a sustainable lightweight body-in-white design , 2012 .

[26]  Imtiaz Ahmed Choudhury,et al.  A critical assessment of lubrication techniques in machining processes: a case for minimum quantity lubrication using vegetable oil-based lubricant , 2013 .

[27]  Giuseppe Ingarao,et al.  Sustainability issues in sheet metal forming processes: an overview , 2011 .

[28]  G. Mochnal,et al.  Enhancement of Aluminum Alloy Forgings through Rapid Billet Heating , 2006 .

[29]  Michael F. Ashby.  Materials and the environment , 1992 .

[30]  Lin Li,et al.  Multi-objective optimization of milling parameters – the trade-offs between energy, production rate and cutting quality , 2013 .

[31]  L. N. López de Lacalle Marcaide,et al.  A sustainable process for material removal on pure copper by use of extremophile bacteria , 2014 .

[32]  Pascal Mognol,et al.  Sustainable manufacturing: evaluation and modeling of environmental impacts in additive manufacturing , 2013, The International Journal of Advanced Manufacturing Technology.

[33]  Markus A. Reuter,et al.  Recycling of distributed aluminium turning scrap , 2002 .

[34]  P. Eng.  CO2 emissions from fuel combustion: highlights , 2009 .

[35]  Bernd-Arno Behrens,et al.  Reprocessing of AW2007, AW6082 and AW7075 aluminium chips by using sintering and forging operations , 2014, Prod. Eng..

[36]  Julian M. Allwood,et al.  Assessing the potential of yield improvements, through process scrap reduction, for energy and CO2 abatement in the steel and aluminium sectors , 2011 .

[37]  Wim Dewulf,et al.  Methodology for systematic analysis and improvement of manufacturing unit process life cycle inventory (UPLCI) Part 1: Methodology Description , 2011 .

[38]  Sami Kara,et al.  Carbon emissions and CES™ in manufacturing , 2008 .

[39]  Lin Li,et al.  Energy requirements evaluation of milling machines based on thermal equilibrium and empirical modelling , 2013 .

[40]  Taylan Altan,et al.  Cold And Hot Forging: Fundamentals And Applications , 2004 .

[41]  Sami Kara,et al.  Towards Energy and Resource Efficient Manufacturing: A Processes and Systems Approach , 2012 .

[42]  Jian Cao,et al.  Exergy analysis of incremental sheet forming , 2012, Prod. Eng..

[43]  Behnam Davoodi,et al.  Experimental investigation and optimization of cutting parameters in dry and wet machining of aluminum alloy 5083 in order to remove cutting fluid , 2014 .

[44]  Hirohisa Narita,et al.  Development of Prediction System for Environmental Burden for Machine Tool Operation , 2006 .

[45]  Nicolas Serres,et al.  Environmental comparison of MESO-CLAD® process and conventional machining implementing life cycle assessment , 2011 .