In order to solve the problem of difficult adjustment of process parameters of pipeline gas metal active welding(GMAW)overhead welding position,from the perspective of molten pool morphology analysis,a set of molten pool monitoring test system based on visual sensing is established,which can collect the molten pool image of the overhead welding position,and the image processing algorithm is used to extract the contour of the molten pool edge,and then the four characteristic parameters of the molten pool,such as length,width,area and tail support angle are defined,so as to vividly characterize the molten pool morphology. Through controlling variable test and orthogonal test,the relationship between the morphology characteristic parameters of the molten pool and the welding process parameters is analyzed,and the influence degree of variation of welding voltage,wire feeding speed,welding speed and pendulum width combination on the morphology characteristic parameters of the molten pool is studied. Test results show that morphological characteristic parameters of the molten pool can truly reflect the dynamic changes of the molten pool,the process parameters of the overhead welding position optimization make the molten pool state stable,and the weld forming quality meets the engineering application standards.
关键词
视觉传感/仰焊位置/熔池形貌/图像处理/工艺试验
Key words
visual sensing/overhead welding position/molten pool morphology/image processing/process test
维普
万方数据