摘要
文中对摆动电弧窄间隙立向上GMAW工艺进行了研究.结果表明,窄间隙立向上焊缝表面中间凸起,而立向下焊缝中间下凹;摆动角度和摆动速度的增加均有利于焊缝中间凸起高度的降低,侧壁停留时间对焊缝中间凸起的影响较小;电弧在坡口中间摆动时单位移动轨迹长度上的电弧能量能够影响焊缝中间凸起高度,侧壁停留时的单位移动轨迹长度上的电弧能量则主要影响焊缝熔宽,摆动参数通过影响电弧能量的分布来影响焊缝熔宽和中间凸起高度.
The weld cross-section formation in oscillating arc narrow gap vertical GMAW was investigated and the effect of oscillating parameters on the wend cross-section formation was analyzed. The results show that the weld cross-section formation was characterized with convex surface during oscillating arc vertical-up GMAW, while it was concave during vertical-down GMAW. The increase in oscillating angle and oscillating speed was beneficial to the increase of weld width and reduction of convex height in oscillating arc narrow gap vertical-up GMAW,while the dwell time had little influence on the weld cross-section formation. The heat input per unit length in oscillating arc welding was divided into two parts which were input heat per unit length in oscillating process and in dwell process,respectively.The input heat per unit length in oscillating process could affect the convex height of weld cross-section, while that in dwell process could affect the weld width. The oscillating parameters controlled the weld cross-section formation by affecting the distribution of input heat in oscillating arc narrow gap vertical-up GMAW.
出处
《焊接学报》
EI
CAS
CSCD
北大核心
2015年第4期56-60,116,共6页
Transactions of The China Welding Institution
基金
国家自然科学基金资助项目(51275109)
关键词
摆动焊接
窄间隙焊接
GMAW
立焊
oscillating arc welding
narrow gap welding
GMAW
vertical welding
