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、基材或焊絲上有油污、銹跡、污垢、氧化皮;

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

　　b、焊接電弧過長，降低了氣體保護(hù)效果;

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

　　C.焊接現(xiàn)場空氣流量大，不利于氣體保護(hù);

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

　　d、噴嘴與工件之間距離過大，會(huì)降低氣體保護(hù)效果;

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

　　E.焊接參數(shù)選擇不當(dāng);

　　E. Improper selection of welding parameters;

　　F.重復(fù)引弧產(chǎn)生氣孔;

　　F. Air holes are produced by repeated arc striking;

　　環(huán)境空氣濕度高。

　　High ambient air humidity.

　　H.氣體純度低，氣體保護(hù)效果差;

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

　　預(yù)防措施:

　　Precautions:

　　A.焊接地點(diǎn)的合理選擇;

　　A. Reasonable selection of welding location;

　　B.適當(dāng)縮短弧長;

　　B. Shorten the arc length properly;

　　c、焊絲及焊件表面的油污、污物、銹跡、氧化皮、氧化膜等應(yīng)在焊接前仔細(xì)清理干凈，并使用高脫氧劑焊絲;

　　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.噴嘴與焊接件保持合理距離;

　　D. Keep reasonable distance between nozzle and weldment;

　　E.盡量選擇較厚的焊絲，增加工件坡口鈍邊的厚度。一方面可以允許大電流，另一方面可以減少焊絲在焊縫金屬中的比例，有效降低氣孔率;

　　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.盡量不要在同一個(gè)地方重復(fù)圓弧。如需重復(fù)電弧，應(yīng)打磨或刮除;焊縫一旦出現(xiàn)電弧要盡量焊接更長時(shí)間，不要隨意折斷電弧，為了減少接頭的數(shù)量，在接頭處需要有一定的焊縫重疊;

　　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.更換保護(hù)氣體;

　　G. Replace the protective gas;

　　H.檢查氣流;

　　H. Check the air flow;

　　一、基材預(yù)熱;

　　1、 Preheating of base material;

　　檢查氣管有無漏氣或損傷;

　　Check the air pipe for air leakage or damage;

　　空氣濕度低時(shí)焊接，或使用加熱系統(tǒng)

　　Welding when air humidity is low, or using heating system

　　以上就是對濟(jì)南鐵藝大門焊制時(shí)出現(xiàn)氣泡的原因的詳細(xì)介紹，想要了解更多請點(diǎn)擊官網(wǎng)http://nsjsw.cn

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