Carbon Emission Modeling and Multi-response Evaluation of Fiber Laser Welding

doi:10.3901/JME.2023.07.186

Abstract

Abstract: Under the background of global warming, the collaborative exploration of environmental impact and manufacturing quality has become one of the research hotspots. Laser welding is widely used in automobile, aerospace, rail transit and other manufacturing industries, but as high carbon emission and low energy utilization rate. Thus, it is urgent to analyze the carbon emission characteristics of the laser welding process, and to carry out a comprehensive evaluation in collaboration with the welding performance. By building a platform for monitoring carbon emissions from laser welding, the carbon emission characteristics and proportions of each system (laser generator, chiller, robot, shielding gas system) of the laser welding platform are analyzed, the carbon emission model of laser butt welding is constructed, and the proportions of carbon emissions in different stages of each system are calculated. Based on the optimal Latin hypercube sampling method, the design of experiment is carried out, and the laser butt welding experiment is conducted. Tensile strength and bead integrity are used as evaluation indicators of welding performance. The effects of laser process parameters (laser power, welding speed, defocus amount) on carbon emission and welding performance are analyzed. The experimental results show that welding speed has the greatest effect on the carbon emission, while laser power has the greatest effect on tensile strength and bead integrity. For the three response indicators, the laser power has a positive effect, while the welding speed has a negative effect. Based on the presented comprehensive evaluation method for multi-response, the experimental results of 25 groups of laser butt welding are scored and ranked. The presented method can provide a certain reference for the engineering evaluation of laser low-carbon manufacturing.

Key words: laser welding, carbon emission, modeling, welding performance, multi-response evaluation

CLC Number:

TG161

WU Jianzhao, SUN Jiahao, ZHANG Chaoyong, CAO Huajun, GE Weiwei. Carbon Emission Modeling and Multi-response Evaluation of Fiber Laser Welding[J]. Journal of Mechanical Engineering, 2023, 59(7): 186-199.

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