Study On Low Carbon Metabolic Behavior In Arc Additive And Subtractive Manufacturing Industry

The traditional manufacturing mode has high energy consumption,high pollution and high emission,facing serious environmental problems,and has been highly valued by various countries.Low-carbon manufacturing has become the inevitable choice for traditional manufacturing industry to realize "green manufacturing engineering".As one of the potential new manufacturing technologies,arc fuse additive and subtractive manufacturing has attracted the attention of civil aviation industry and national defense industry which use high hardness metal materials and need precision machining,and more and more related researches have been conducted.However,there are few quantitative studies on the input and output of substances and energy in the mixed manufacturing process.Therefore,it is of great research value to explore and master the metabolic behavior of substances and energy in the arc mixed manufacturing system,and analyze the metabolic mechanism of substances and energy and carbon emission characteristics in the production of parts.This paper is supported by "Research on Transient Flux Regulation and Evolution Mechanism of Industrial Metabolic Network in Manufacturing System(52175480)" and "Research on Inherent Energy Efficiency Attribute and Optimization Method of Machining and Manufacturing System(517775392)" supported by National Natural Science Foundation of China.In view of the current environmental problems facing the development of manufacturing industry,combined with the metabolic behaviors and ways of substances and energy in the mixed manufacturing process,the low-carbon behavior of arc fuse in the mixed manufacturing process of adding and reducing materials was studied.The main research contents of this paper are as follows:Firstly,the analysis method of industrial metabolism theory and the construction method of metabolic nodes were described.The HWMP production process was divided into two major manufacturing nodes,namely arc fuse additive and NC milling,according to the process node.The input and output of material energy of manufacturing node were quantified according to the metabolic mechanism of material energy.Based on the relationship between the processing behavior parameters in the arc fuse additive node and the amount of CNC milling,the "line" metabolic behavior of hybrid manufacturing was constructed,which provided a theoretical basis for the study of low-carbon behavior of the arc fuse additive and subtracting hybrid manufacturing system.Secondly,the relationship between material and energy metabolic behavior and carbon emissions in the process of mixed manufacturing was analyzed.According to the differences in metabolic material and energy,carbon emissions in the process of mixed manufacturing were divided into energy carbon sources,material carbon sources,environmental carbon sources and recycled carbon sources,and carbon emissions from the above four carbon sources were modeled.Then,the influencing factors between the behavioral parameters and carbon emission characteristics in the mixed manufacturing process were studied.According to the behavioral parameters and material and energy metabolism data in the experiment,the carbon emissions of each metabolite were analyzed.It was found that in the overall processing process,the increase of additive speed,spindle speed,cutter feed speed and cutting depth would reduce the total carbon emissions.With the increase of wire feeding speed and additive voltage,the size of metal pass increases,and the total carbon emission increases.In addition,the interaction between wire feeding speed and additive voltage is the most significant in additive processing.Finally,a multi-objective optimization model with minimum carbon emission and processing time is constructed.Taking the bearing base of an aircraft as an example,NSGA-II genetic algorithm was used to solve the low carbon behavior model,and the effectiveness of the low carbon behavior model was verified through comparative analysis of actual processing.Moreover,compared with the traditional casting-machining process,it was found that compared with the traditional casting-machining process,The HWMP manufacturing process improves material utilization by 7%,reduces construction time by 66%,and reduces total carbon emissions by 20%.