为分析CMT焊接方法的工艺特点,采用高速CCD摄像机建立了电弧形态和熔滴过渡视觉传感系统并且通过电流、电压传感器建立了波形采集系统,以此分析其能量输入特点和熔滴过渡行为.结果显示,CMT焊接波形控制呈现典型的直流脉冲特征,焊接时热输入较低;在CMT短路过渡过程中,熔滴尺寸随焊接电流的增加幅度不大,将熔滴尺寸控制在一定范围内可实现稳定的短路过渡.CMT短路过渡通过焊丝回抽,避免了大的电磁力,有效地消除了飞溅.当电流增大到一定值时,其过渡形式将转变为射滴过渡和短路过渡的混合过渡.
To analyze process characteristic of CMT welding method,experimental systems to photograph arc shape and molten droplet images by using high-speed charge coupled device camera and to record welding current and arc voltage in synchronism were established.The energy input characteristic and metal transfer behavior were analyzed by above-mentioned experimental systems.The results show that CMT welding process is typical direct current impulse process and has lower heat input during welding.The droplet size does not increase obviously with raising welding current.The stable droplet size is beneficial for short circuiting transfer.The spatter can be eliminated with the aid of adscititious force.A hybrid metal transfer made up of projected transfer and short circuiting transfer also can be found when welding current reaching a rather large value.
参考文献
| [1] | 区智明,孙晓明,夏胜全.改善MIG/MAG短路过渡焊接电弧工艺性能的方法[J].电焊机,2009(01):77-82. |
| [2] | 姚屏,薛家祥,蒙万俊,朱思君.工艺参数对铝合金双脉冲MIG焊焊缝成形的影响[J].焊接学报,2009(03):69-72. |
| [3] | 文元美,黄石生,薛家祥,解生冕.脉冲MIG焊不稳定过渡过程的观察与分析[J].焊接学报,2008(04):13-17. |
| [4] | 杨修荣.超薄板的CMT冷金属过渡技术[J].焊接,2005(12):52-54. |
| [5] | Jicai Feng;Hongtao Zhang;Peng He .The Cmt Short-circuiting Metal Transfer Process And Its Use In Thin Aluminium Sheets Welding[J].Materials & design,2009(5):1850-1852. |
| [6] | Zhang, HT;Feng, JC;He, P;Zhang, BB;Chen, JM;Wang, L .The arc characteristics and metal transfer behaviour of cold metal transfer and its use in joining aluminium to zinc-coated steel[J].Materials Science and Engineering. A, Structural Materials: Properties, Microstructure and Processing,2009(1/2):111-113. |
| [7] | Lin Sanbao,Fan Chenglei,Song Jianling,Yang Chunli.Research on CMT welding of nickel-based alloy with stainless steel[J].中国焊接,2007(03):23-26. |
| [8] | K FURUKAWA .New CMT arc welding process - welding of steel to aluminium dissimilar metals and welding of super-thin aluminium sheets[J].Welding International,2006(6):440-445. |
| [9] | 闫志鸿,张广军,高洪明,吴林.P-GMAW熔池双面视觉传感与图像处理[J].材料科学与工艺,2007(05):593-596. |
| [10] | 李瑞峰,于治水,施一丰,钱乙余,王宇.Q235和镀锌钢板氩弧钎焊电弧形态及其比热流分布对比分析[J].华东船舶工业学院学报(自然科学版),2004(02):51-55. |
| [11] | 符卫,胡绳荪,尹玉环.熔滴过渡对脉冲熔化极氩弧焊快速成形的影响[J].机械工程学报,2009(04):95-99. |
- 下载量()
- 访问量()
- 您的评分：
-
10%
-
20%
-
30%
-
40%
-
50%