A Multi-process Decision-making Model For Low Carbon Manufacturing Of Mechanical Products Based On Carbon Benefit Indicator And Its Application

Along with the growing of global resources, energy shortages and climate changepressure, the “low carbon manufacturing” model which is to resource conservation andenergy cleaning as the target has been proposed and it was attached great importance byacademia and industry soon. However, because of the manufacturing processtechnological characteristics of the products, analyzing the carbon benefit characteristicsof the product manufacturing processes, maximizing the economic benefits generatedby the unit time and per unit of carbon emissions in the production process, all of whichwill produce great significance for enterprises to implement low-carbon manufacturing.With support from Natural Science Foundation of China-“The manufacturingsystem dynamic model of carbon flow and carbon efficiency assessment methods basedon generalized characteristic function set (51075415)”, the carbon benefit analysis andprocess decision-making model of parts and assemblies manufacturing process arestudied.Firstly, based on the characteristics of the parts manufacturing processes,combining with the factors of benefit, production cycle and carbon emissions, thecomprehensive evaluation index “carbon benefit” was proposed. And the manufacturingprocess carbon emissions characteristics of the parts were analyzed, and the partscarbon emissions calculation model was exported with determining the carboncalculation system boundary in the manufacturing process. And on this basis, themultiple process of low carbon manufacturing decision-making model which is tocarbon benefit greatly to the goal was developed, the dynamic change characteristics ofcarbon benefit for production were also analyzed.Secondly, based on the decision-making analysis of the part processes, the carbonbenefit of the assembly was proposed, and the calculation methods of the assemblyproduction cycle, benefit and carbon emissions were analyzed. And because of thedifferent processes of the parts lead to the different process plans of the assembly, itmakes the impact of the overall carbon benefit. Assembly processes selection andassembly processes carbon benefit generation model was developed with thepolychromatic theory. And the model was analyzed from the model definition, ruledescription, selection strategy, etc, respectively. Finally, the produced straight cylindrical gear reducer by Chongqing Machine Tool(Group) co., ltd is chosen as example to model the carbon benefit in the reducermanufacturing process. Combined with the analysis of the parts and assembly carbonbenefit, analyzed the impact of the reducer carbon benefits by the different reducer partsprocess scheme selection. And quantitative analysis of the dynamic behavior of thecarbon benefit of the reducer parts with the survey data, in order to verify the feasibilityof the proposed method.