First of all, technology
1. Preparation stage
Check whether the welding machine, power supply and argon gas are normal, and prepare the corresponding welding materials and tools.
2. Positioning welding
Positioning welding shall be carried out at the parts to be welded, so as to ensure accurate weld position and moderate weld length.
3. Arc striking
High-frequency arc initiation or contact arc initiation is adopted. The output end of the welding machine gently contacts with the weldment, and then it is quickly lifted, so that the arc initiation point generates an arc.
4. Welding process
The arc length is controlled to make the arc burn stably under argon protection. Select the appropriate welding current and welding speed according to the thickness and material of the weldment.
5. Filled welding wire
After the molten pool is formed, the welding wire should be filled into the molten pool in an appropriate amount to avoid too much or too little.
Closed arc
Attention should be paid to lengthening the arc when closing the arc, so that the weld can be fully fused and the arc closing pit can be avoided.
7. Argon protection
During the whole welding process, argon gas should be protected to prevent the weld from being oxidized.
8. Post-welding treatment
After welding is completed, check the weld quality and repair and treat it if necessary.
Second, skills.
1. Before welding, fully understand the performance and operation method of the welding machine to avoid welding defects caused by improper use.
2. Maintain a stable welding posture during welding to avoid welding deformation or damage caused by improper operation.
3. Choose appropriate welding parameters according to the material and thickness of the weldment, such as current, voltage, welding speed, etc.
4. Pay attention to the quantity and timing of welding wire filling to avoid welding defects caused by too much or too little filling.
5. When the arc is closed, the arc should be lengthened, so that the weld can be fully fused and the arc closing pit can be avoided.
6. Argon protection should be stable to avoid welding defects caused by uneven argon flow.
7. After welding is completed, clean up the site in time to keep the environment clean and tidy.