| At present,there are many problems in the manufacturing industry,such as high carbon emission,high energy consumption and low efficiency,which aggravate the situation of resource shortage and environmental deterioration.It is difficult to meet the demand of the current manufacturing industry to develop towards green energy saving.Low carbon manufacturing as a perspective to the whole life cycle of sustainable manufacturing model,considering resources,environment and carbon emissions,to achieve social,economic and environmental benefits effective coordinated unification,has become the current academic and industrial research and pay attention to the direction of the hot spots,and gradually integrated into the current modern manufacturing fields,Especially in the field of high energy consumption and high emission laser processing.Laser welding technology has the advantages of high energy density,high efficiency and high quality,high flexibility and easy to realize automation and other advantages,is one of the most potential and development prospects of modern manufacturing connection technology,increasingly widely used in ships,automobiles,aerospace and military equipment and other high-end fields.However,laser welding technology has problems such as high energy consumption,high material consumption and low resource utilization efficiency,and it is also a modern technology with high carbon emission.Therefore,in order to improve the resources and environment benefits,combining with the national natural science fund project "the low carbon manufacturing system for laser processing technology and optimization of basic theory and key technologies",such as subject,put forward a kind of aluminum alloy laser welding process system based on carbon efficiency low carbon optimization method,in order to realize low carbon,green laser welding technology.Firstly,the process and characteristics of laser welding of aluminum alloy,as well as the carbon emission characteristics of laser welding system of aluminum alloy were analyzed,and the carbon emission model was established.The laser welding and laser cleaning process of the laser welding system of aluminum alloy were preliminarily analyzed,the system boundary was defined according to the carbon emission method and carbon source identification of the laser welding system,and the carbon emission model established based on the modular characteristics of the equipment of the laser welding system of aluminum alloy was elaborated in detail.Secondly,the carbon efficiency evaluation index of aluminum alloy laser welding system was constructed according to the carbon emission modeling content.Firstly,the general definition method of carbon efficiency of mechanical manufacturing system is described,and the basic principle and application steps of entropy weight method are described in detail.The index systems of productivity carbon efficiency,tensile strength carbon efficiency,cost carbon efficiency and comprehensive carbon efficiency of laser welding system are constructed from multi-dimension.Then,the target cascade method was used to optimize the carbon emission and carbon efficiency of laser welding system.The basic idea of the target cascade method is introduced in detail,and the mathematical formula of the three-level structure system is given.Then,according to the carbon efficiency characteristics of the laser welding system,the system is divided into two levels.The carbon efficiency optimization model of the process layer and the carbon emission optimization model of the equipment layer are established respectively by using the target cascade method.Finally,the laser welding experiment of aluminum alloy was carried out,and the target cascade method was applied to the laser welding experiment to optimize the carbon efficiency of the process system layer and the carbon emission of the equipment layer of the laser welding process system,and the degree and law of the influence of the process parameters factors on the two were obtained. |
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