关键词: 激光焊接, 碳效率, 熵权法, 目标级联法, 低碳优化

Abstract: Laser welding technology is widely used in automotive,aviation and other fields.To improve its resource and environmental benefits,a low carbon optimization method of aluminum alloy laser welding process system was proposed based on comprehensive carbon efficiency.The laser welding system carbon emission model was established by analyzing the carbon emission characteristics of the boundary resource consumption of laser welding system.Entropy weight method was used to assign weights to the three indexes of productivity,tensile strength and welding cost respectively,and a comprehensive carbon efficiency model of laser welding system based on carbon emission was constructed.The Analytical Target Cascading (ATC) low-carbon optimization model was proposed,which taken the comprehensive carbon efficiency of the process system layer and the carbon emission of equipment layer as the optimization objectives,and taken the laser power,welding speed and wire feeding speed as the optimization parameters.Through applying the carbon efficiency model of laser welding and low carbon optimization method to the laser welding experiment of aluminum alloy,the optimal process parameters were obtained,thus the practicability of the method was verified.

Key words: laser welding, carbon efficiency, entropy weight method, analytical target cascading, low carbon optimization