Aluminum door is composed of various parts. In order to make the aluminum door stronger, it needs to be welded. However, in the welding process, it will be found that many places or small holes appear, which will affect the decorative effect of aluminum doors, so how to solve the problem

　　a、基材或焊丝上有油污、锈迹、污垢、氧化皮;

　　a. Oil, rust, dirt and oxide skin on the base material or welding wire;

　　b、焊接电弧过长，降低了气体保护效果;

　　b. Too long welding arc reduces the effect of gas protection;

　　C.焊接现场空气流量大，不利于气体保护;

　　C. Large air flow in welding site is not conducive to gas protection;

　　d、喷嘴与工件之间距离过大，会降低气体保护效果;

　　d. If the distance between the nozzle and the workpiece is too large, the gas protection effect will be reduced;

　　E.焊接参数选择不当;

　　E. Improper selection of welding parameters;

　　F.重复引弧产生气孔;

　　F. Air holes are produced by repeated arc striking;

　　环境空气湿度高。

　　High ambient air humidity.

　　H.气体纯度低，气体保护效果差;

　　H. The purity of gas is low and the effect of gas protection is poor;

　　预防措施:

　　Precautions:

　　A.焊接地点的合理选择;

　　A. Reasonable selection of welding location;

　　B.适当缩短弧长;

　　B. Shorten the arc length properly;

　　c、焊丝及焊件表面的油污、污物、锈迹、氧化皮、氧化膜等应在焊接前仔细清理干净，并使用高脱氧剂焊丝;

　　c. Oil, dirt, rust, oxide skin and oxide film on the surface of welding wire and weldment shall be cleaned carefully before welding, and high deoxidizer welding wire shall be used;

　　D.喷嘴与焊接件保持合理距离;

　　D. Keep reasonable distance between nozzle and weldment;

　　E.尽量选择较厚的焊丝，增加工件坡口钝边的厚度。一方面可以允许大电流，另一方面可以减少焊丝在焊缝金属中的比例，有效降低气孔率;

　　E. The thicker welding wire shall be selected as far as possible to increase the thickness of the blunt edge of the workpiece groove. On the one hand, it can allow large current, on the other hand, it can reduce the proportion of welding wire in the weld metal and effectively reduce the porosity;

　　F.尽量不要在同一个地方重复圆弧。如需重复电弧，应打磨或刮除;焊缝一旦出现电弧要尽量焊接更长时间，不要随意折断电弧，为了减少接头的数量，在接头处需要有一定的焊缝重叠;

　　F. Try not to repeat the arc in the same place. If it is necessary to repeat the arc, it shall be polished or scraped off; once the arc occurs in the weld, it shall be welded for a longer time as much as possible, and the arc shall not be broken at will. In order to reduce the number of joints, a certain amount of weld overlap is required at the joint;

　　G.更换保护气体;

　　G. Replace the protective gas;

　　H.检查气流;

　　H. Check the air flow;

　　一、基材预热;

　　1、 Preheating of base material;

　　检查气管有无漏气或损伤;

　　Check the air pipe for air leakage or damage;

　　空气湿度低时焊接，或使用加热系统

　　Welding when air humidity is low, or using heating system

　　以上就是对济南铁艺大门焊制时出现气泡的原因的详细介绍，想要了解更多请点击官网http://www.jnghbxg.com

　　The above is a detailed introduction to the causes of bubbles during the welding of Jinan iron gate. For more information, please click http://www.jnghbxg.com