摘要
熔池振荡频率与熔池尺寸具有直接的物理关系,在脉冲电流的激发下,焊接熔池自由表面将会以其自身固有频率振荡。在实验室现有的脉冲微束等离子弧焊接试验系统基础上,设计并搭建焊接电信号实时采集系统,利用LabView软件对采集到的电弧电压信号进行频谱分析,从中提取到了熔池的振荡频率。并设计变量实验,以探讨脉冲频率增加对于熔池振荡频率的影响。结果表明,在其他焊接工艺参数不变的前提下,随着脉冲频率的增加熔池的振荡频率几乎呈线性增加,且熔池振荡频率约为脉冲频率的5倍。
The oscillating frequency of the molten pool has a direct physical relationship with the size of the molten pool.Under the excitation of the pulse current,the free surface of the welding pool will oscillate at its own natural frequency.The arc voltage can be collected and analyzed by spectrum analysis to obtain the natural oscillation frequency of molten pool.Based on the pulse micro-beam plasma arc welding test system,the arc voltage signal acquisition system is designed and built.The virtual instrument software LabView is used to collect and process the arc voltage signal to obtain the oscillation frequency of the molten pool.The variable experiment is designed to investigate the influence of pulse frequency increase on the natural oscillation frequency of the molten pool.The results show that under the premise of other welding process parameters,the oscillation frequency of the molten pool increases almost linearly with the increase of pulse frequency,and the oscillation frequency of the molten pool is about 5 times of the pulse frequency.
作者
陶旭阳
何建萍
徐磊
TAO Xuyang;HE Jianping;XU Lei(School of Materials Engineering,Shanghai University of Engineering Science,Shanghai 201620,China)
出处
《智能计算机与应用》
2020年第3期371-374,共4页
Intelligent Computer and Applications
