摘要
根据电弧物理基本原理，建立了ＭＩＧ焊接电流密度在变形熔池表面的分布模型，在此基础上得到电弧压力计算模型计算结果表明，ＭＩＧ焊接电弧压力在电弧中心线附近呈双峰分布，且双峰向电弧后方偏移，在离开电弧中心线一定距离处变为单峰分布．熔池表面变形程度对电弧压力分布有显著影响．采用双峰分布的电弧压力、热流密度分布模型，定量分析了焊接工艺参数对解地几何形状的影响规律，为焊缝几何尺寸的预测和控制提供了可靠数据．基于该模型计算的焊缝几何形状与实测的吻合良好。
Based on the general principle of arc physics, a distribution model of current density on the deformed weldpool surface is established. Based on this model the calculated model of arc pressure is developed. The calculated results show that the distribution of arc pressure is bimodal form near the arc centerline, and becomes the form of single peak at a certain distance from the arc centerline. The distribution model of arc pressure is markedly modified by the shape of weldpool surface. By means of the bimodal distribution of arc pressure and the model of arc heat flux, a quantitative analysis is carried out to determine the relationship between welding process parameters and weld dimensions, which provides dependable data to predict and control weld dimension. According to this distribution model, the predicted weld dimensions is in agreement with measured one.
出处
《金属学报》
SCIE
EI
CAS
CSCD
北大核心
2001年第4期434-438,共5页
Acta Metallurgica Sinica
基金
教育部优秀年轻教师基金
高等学校重点实验室访问学者基金资助项目
