Carbon Efficiency And Application Of Selective Laser Melting Process For Addicitive Manufacturing

Made in China 2025 clearly puts forward the strategic deployment of "fully implementing green manufacturing" and "green manufacturing engineering".Binding challenge of resource, environment and energy consumption make that the manufacturing model of low carbon manufacturing reduced resource consumption and greenhouse effect has been widely aroused the academia and industry attention. Selective Laser Melting(SLM) process for additive manufacturing is a new emerging technology for 3D printing and suitable for directly fabracting parts without intermediate binder. However, the SLM process lacks of effective research method about life-cycle carbon emissions characteristics and causes the high cost of production raw material, the time-consuming of manufacturing process and high energy consumption. Under the support of National Science Foundation of China project(NO.51075415), the paper carries out the research for carbon efficiency evaluation and application of selective laser melting process for additive manufacturing. The life-cycle carbon emissions model of SLM, the dynamic characteristics of carbon emission and carbon efficiency evaluation method is analyzed and researched in this paper. This works would provide support theory and tool for selective laser melting process for implement low carbon manufacturing evaluation. The content of the paper is as follows:First of all, the life-cycle carbon emission model of selective laser melting process is established. According to the theory of product life cycle and combined with the characteristic of selective laser melting process, the life-cycle carbon emission model of SLM is built. Based on the energy flow, material flow and information flow, the IDEF0 modle of selective laser melting process is established to describe the principle of SLM. From the perspective of energy consumption and material consumption, the mathematical model of carbon emission for selective laser melting process is quantitatively analyzed. The carbon emission in the manufacturing stage is the key part in this section.Secondly, the dynamic characteristics of carbon emission for additive manufacturing system and the evaluation indexs of carbon efficiency are proposed. Based on the input and output characteristics of real-time coupling, a dynamic characteristic of carbon emissions model for additive manufacturing is established. According to the eco-efficiency, the comprehensive evaluation index of carbon efficiency is provided to evaluate the low carbon performance of additive manufacturing considering the production capacity, resource utilization and production return. Then the relationship between the carbon efficiency indexes and the parameters of indees are analyzed.Finally, a comparison between the processes of selective laser melting and traditional machining is made based on the established carbon efficiency indexes. The carbon emission analyse method for traditional machining is provided. Taking a standard mechanical gear processed as an example, the scheme of gear machining process is built by selective laser melting and traditional machining.