Modeling And Analysis Of Carbon Emission Of Tire Mould In Life Cycle

In September 2020,China clearly put forward the goals of "peak carbon dioxide emissions" in 2030 and "carbon neutrality" in 2060.The dual-carbon goal will bring a wide and profound systematic change to the manufacturing industry.Under the background of dual-carbon target,the tire industry,as one of the representatives of traditional manufacturing industry,urgently needs to change the whole chain.Therefore,this thesis takes the tire mold,one of the key tools in tire manufacturing,as the research object,analyzes its life cycle,establishes a carbon emission model,analyzes the carbon emission and carbon efficiency of different stages,different workpieces and different processes,and puts forward a carbon reduction scheme for tire mold whole life cycle.Firstly,the dynamic characteristics of carbon emission in the whole life cycle of tire molds are analyzed,and the carbon emission model is established based on the carbon emission factor method.The carbon sources and carbon flows in key links of the whole life cycle,such as manufacturing process and remanufacturing process,are analyzed in detail,and the carbon emissions of materials,energy and wastes produced by different stages and different workpieces are obtained,and the results are discussed and analyzed.After analysis,it is found that the actuator ring,sector,segment and other workpieces,nitriding,EDM,rough turning and other processes produce the most carbon emissions,and the energy carbon emissions have the greatest impact on the total carbon emissions,and the remanufacturing stage has significant advantages over the manufacturing stage.Secondly,the carbon emission characteristics of different production processes such as metal cutting,powder metallurgy and laser metal deposition are analyzed for typical tire mold panel,and the carbon emission of remanufacturing processes such as welding and laser metal deposition are analyzed for damaged tire mold panel.The results show that metal cutting technology produces the most carbon emissions during the production of new products,and the carbon emissions generated by remanufacturing damaged parts are less than those generated by manufacturing new products.The remanufacturing by laser metal deposition requires less materials and produces less carbon emissions.Thirdly,according to the structural characteristics of tire mold,the diversity of processing technology and the different needs of enterprises,the concept of carbon efficiency is introduced,and three carbon efficiency indexes,namely time carbon efficiency,material removal rate carbon efficiency and benefit carbon efficiency,are defined.Based on the carbon emission characteristics of tire mold throughout its life cycle,the carbon efficiency of each workpiece and each process stage is evaluated in many aspects,angles and dimensions.The results show that the time carbon efficiency of actuator ring workpiece and nitriding process is the highest,which is consistent with the calculation results of carbon emission.The carbon efficiency of lettering,EDM and welding in cavity machining is higher.Although the benefits of welding waste panel and metal cutting panel are higher,the carbon efficiency of damaged parts remanufacturing process is higher.The results of three different carbon efficiency calculations are different,and the multi-dimensional comprehensive evaluation of carbon emissions in the whole life cycle is realized.Finally,the carbon emissions and carbon efficiency are evaluated in a unified way,and the optimization scheme is put forward for the workpieces and process links with high carbon emissions and high carbon efficiency to achieve the carbon emission reduction goal.The results show that using genetic algorithm to optimize equipment processing parameters,improve equipment output per unit time,and implement remanufacturing can effectively reduce the carbon emissions of tire molds in the whole life cycle.By establishing a comprehensive and reasonable carbon emission model,this study solved the problem of carbon emission assessment in the whole life cycle of tire mold.In-depth study and optimization of carbon emission reduction strategies for high-carbon projects will help enterprises to choose better processing technology,better equipment and parameters,and help to achieve the goal of double carbon in tire industry.