Does argon arc welder need welding certificate?

Argon arc welding machine is a kind of electric welding machine. The Administrative Measures for Safety Technology Training and Assessment of Special Operators issued by the State Economic and Trade Commission 1999 partially changed the above definition, and made it clear that special operations refer to operations that are prone to casualties and have great harm to the safety of operators, others and surrounding facilities (such as electricians, metal welding and cutting, etc.). ). Personnel engaged in such operations are called special operations personnel.

Article 13 of the Measures for the Administration of Safety Technical Training and Assessment of Special Operations Personnel

Personnel participating in the qualification examination for safe operation of special operations shall fill in the assessment application form, and the applicant or the unit to which the applicant belongs shall apply to the local unit responsible for the assessment of special operations personnel.

The evaluation unit shall organize the evaluation within 60 days after receiving the application for evaluation. Those who pass the examination shall be issued with corresponding special operation certificates; Those who fail the examination are allowed to make up the exam 1 time.

Extended data:

welding process

Welding technology is mainly used for metal substrates, such as arc welding, argon arc welding, CO2 shielded welding, oxygen-acetylene welding, laser welding and electroslag pressure welding. Non-metallic materials such as plastics can also be welded. There are more than 40 kinds of metal welding methods, which are mainly divided into three categories: fusion welding, pressure welding and brazing.

Fusion welding is a method of heating the workpiece interface to a molten state without increasing pressure during welding. When welding, the heat source quickly heats and melts the interface between two workpieces to be welded, forming a molten pool. The molten pool moves forward with the heat source, and after cooling, it forms a continuous weld to connect the two workpieces into a whole.

Pressure welding is to combine two workpieces in solid state under pressure, which is also called solid state welding. The commonly used pressure welding process is resistance butt welding. When the current passes through the connection end of two workpieces, the temperature there rises due to the large resistance, and when it is heated to a plastic state, it is connected into a whole under the action of axial pressure.

Brazing is a method that uses a metal material with a melting point lower than that of the workpiece as a brazing filler metal, heats the workpiece and the brazing filler metal to a temperature higher than or lower than the melting point of the workpiece, wets the workpiece with liquid brazing filler metal, fills the interface gap, and realizes mutual diffusion between atoms with the workpiece, thus realizing welding.

The weld formed when welding two connectors is called weld. When welding, both sides of the weld will be affected by welding heat, and the structure and properties will change. This area is called the heat affected zone. When welding, due to the difference of workpiece material and welding current, etc. After welding, the weld seam and heat affected zone may be overheated, brittle, hardened or softened, which will also reduce the performance of the weldment and worsen the weldability.

Reference source:

Baidu Encyclopedia-Management Measures for Safety Technology Training and Assessment of Special Operators

Baidu encyclopedia-special work

Baidu encyclopedia-special task