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激光焊接硅钢片熔池研究及数值模拟

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硅钢片由于其良好的磁性能被广泛运用于电机定子铁芯生产.熔池是焊接过程中重要的物理现象,其动态行为影响焊接质量.对焊接熔池进行研究,通过焊接过程视觉监测和数值模拟相结合的方式研究了焊接参数对熔池的影响规律及熔池的温度场变化情况.同时,改进U-Net模型,在实现网络轻量化的同时提高网络性能,改进后的模型能够准确分割出熔池并提取特征.改进模型的平均交并比和平均像素精度分别达到95.91%和98.59%,均优于原始模型.数值模拟结果表明,熔池面积和焊接深度与熔池温度呈正相关,监测熔池面积能够较好反映焊接深度变化.这有助于实现焊接过程的在线监测和焊接深度预测.
Research and Numerical Simulation on Molten Pool of Laser Welded Silicon Steel Sheets
Silicon steel sheets are widely used in the production of motor stator cores due to their good magnetic properties.The molten pool is an important physical phenomenon in the welding process,and its dynamic behavior affects the welding quality.This paper studies the welding molten pool,and studies the influence of welding parameters on the molten pool and the temperature field changes of the molten pool through a combination of visual monitoring of the welding process and numerical simulation.At the same time,the U-Net network model has been improved,which improves network performance while achieving network lightweighting,and can accurately segment the melt pool and extract features.The average intersection ratio and average pixel accuracy reached 95.91%and 98.59%respectively,both of which were better than the original model.Numerical simulation results show that the molten pool area and welding depth are positively correlated with the molten pool temperature,and monitoring the molten pool area can better reflect the changes in welding depth.This facilitates online monitoring of the welding process and prediction of welding depth.

laser weldingmolten poolimage processingnumerical simulation

胡炳阳、陆雨阳、陈彦秋、刘禹、胡磊、彭俊、杨家林

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江南大学机械工程学院,江苏 无锡 214122

江苏省食品先进制造装备技术重点实验室,江苏 无锡 214122

无锡隆盛科技股份有限公司,江苏 无锡 214028

中国工程物理研究院机械制造工艺研究所,四川 绵阳 621900

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激光焊接 熔池 图像处理 数值模拟

2024

激光与光电子学进展
中国科学院上海光学精密机械研究所

激光与光电子学进展

CSTPCD北大核心
影响因子:1.153
ISSN:1006-4125
年,卷(期):2024.61(17)