1, welding work requires certificates, so how to handle the welding certificate? Taking Foshan as an example, this paper shows that the welding certificate belongs to the special operation certificate, belongs to the category of safe production operation, and generally belongs to the jurisdiction of the emergency management bureau. Search Foshan Emergency Management Bureau on the Internet and go to the official homepage.

2. In the official homepage search agency, the welder's license is generally obtained by a training institution approved by the government. Find the nearest training institution in the information registration list of Foshan safety production training institutions on the search results page, and apply for welder license after training and examination as required.

3. After receiving the certificate, you can follow the "Foshan Emergency Management" of the official WeChat account on the mobile phone WeChat, and click "Special Work Permit Inquiry" to check the authenticity of your certificate. The welder's certificate is reviewed every two years, and it is also reviewed in the training institution.

Matters needing attention in welder certificate examination are as follows:

1, test score. First of all, we must practice the basic skills of "stability". In order to control the movement of covered electrode perfectly, if we don't have enough conditions and tools to practice, we can swing the pen horizontally and vertically 2mm away from the desktop, horizontally swinging 15mm, vertically swinging 1.5mm ... It doesn't matter if we practice slowly, but it's important to stick to it.

2. One-sided welding and double-sided molding There are three essentials when using broken arc welding for bottom welding: one is "seeing", the other is "listening" and the third is "accuracy". As long as the basic skills are "stable", "quasi" will naturally come. Secondly, the "perception" of welding current. The current is critical and will affect the weld pool and weld. Before welding, you must adjust your satisfactory current repeatedly.

3. Influence of welding current on molten pool. In the welding process, the viscosity of molten iron in the molten pool is observed by intentionally increasing the current and then decreasing the welding current. It is found that the higher the welding current, the lower the viscosity of molten iron in the molten pool and the higher the fluidity of molten iron in the molten pool. With the increase of welding current, the arc blowing force will increase, and the temperature and volume of molten pool will also increase.