| As the issues of global warming and rising sea levels become increasingly serious,countries are paying more attention to the development concept of energy conservation and emission reduction.As the pillar of China’s national economy,the manufacturing industry has generated a large amount of carbon emissions during its rapid development.In order to respond to the country’s dual-carbon policy,it is imperative to reduce carbon emissions in the manufacturing industry.Flanges are widely used in industries such as petrochemicals,and their processing involves a large amount of energy consumption and carbon emissions.In this article,a carbon footprint accounting model for the flange processing process is constructed based on carbon footprint accounting and low-carbon manufacturing related research.By using an improved grey wolf optimization algorithm to optimize the drilling and processing parameters of flanges with the goal of low carbon and low cost,a feasible solution is provided for the low-carbon manufacturing of flanges.Firstly,based on the current research status of low-carbon manufacturing at home and abroad,carbon emissions in the production process can be reduced by optimizing product design,improving product processing technology,and using green energy.According to the current research status of carbon footprint accounting at home and abroad,starting from the carbon emission characteristics of the required products,the accounting boundary and carbon emission sources should be determined,and the carbon footprint accounting model should be established by comprehensively considering the factors that affect carbon emissions.Most of the research on low-carbon manufacturing-oriented processing parameter optimization at home and abroad is mainly based on multi-objective optimization.After establishing the optimization model,an optimization algorithm is used to solve the model to obtain the processing parameters.In this article,the carbon emission system structure of flanges is clearly defined using the life cycle theory by analyzing the carbon emission characteristics of flanges from the four stages of raw material mining,manufacturing,use,and recycling,combined with the production process of flanges.Secondly,based on the clarification that the machining process of flanges is the boundary for carbon footprint accounting,this paper analyzes the carbon emission sources and influencing factors of the four machining processes of turning,drilling,boring,and grinding from the perspectives of energy and material,and establishes a carbon footprint accounting model for the flange machining process.Using the accounting model combined with actual flange examples,the carbon footprint of each machining process is calculated,and the main sources and characteristics of carbon emissions are analyzed.The optimization variables for flange drilling parameters are determined through single-factor experiments as spindle speed,feed rate,and back-cutting allowance.A low-carbon and low-cost flange drilling optimization model is established by combining the carbon footprint accounting model with the cost function and constraints,and using an improved grey wolf optimization algorithm to solve the model,which addresses the slow convergence,low precision,and easy early entrapment into local optimization problems of traditional grey wolf optimization algorithm.Finally,based on the integration of the flange carbon footprint accounting model,optimization model,and optimization algorithm,and in response to the actual needs of the flange manufacturing enterprise,a carbon footprint accounting system applicable to flange manufacturing enterprises is developed.The system,which focuses on carbon footprint accounting and optimization as its primary functions,facilitates the quantification and monitoring of flange machining carbon emissions,and assists in analyzing and determining the optimal machining parameters,providing solutions for low-carbon manufacturing and carbon footprint management for the enterprise. |
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