Welding knowledge that welders need to learn

1. Theoretical knowledge: Understand the physical and chemical changes in the welding process, such as molten pool formation, metal crystallization, etc. Understand different types of welding materials, including metals, alloys, plastics, etc., as well as commonly used welding materials such as welding rods, welding wires, fluxes, etc., and be familiar with their characteristics and scope of application. Understand the influence of the material and specifications of different welding materials on the welding quality. Be familiar with common welding equipment, such as electric welders, gas welding guns, laser welders, etc., and understand their working principles, operation methods, maintenance and applicable scenarios. Understand the welding process of different materials, including the setting of welding parameters (such as the role and relationship of parameters such as welding current, voltage, welding speed, etc.), preheating, post-processing, etc. Be able to reasonably adjust the welding parameters according to factors such as the material and thickness of the weldment. Master various welding techniques, including manual arc welding, gas shielded welding, plasma welding, laser welding, resistance welding, etc., understand the advantages and disadvantages of each welding technique, so as to choose the appropriate welding technique in actual operation. At the same time, master the basic welding position operations, such as flat welding, vertical welding, horizontal welding, overhead welding, etc., and understand the characteristics and operation points of each welding position.

2. Safety knowledge: Understand the safety measures during welding, including wearing protective equipment (such as protective clothing, protective glasses, gloves, masks, etc.), using protective equipment, maintaining good ventilation, etc., to prevent arc light, spatter, harmful gases, etc. from harming the body. Understand emergency measures in emergency situations, such as fire extinguishing and evacuation, and be familiar with the safe operation of the welding machine to prevent electric shock accidents.

3. Practical experience: Through practical operation exercises, master the basic skills such as adjusting current, hand stability and control, and arc starting skills. After mastering the basic welding skills, you can further improve your welding level by learning more advanced welding skills (such as arc breaking welding, etc.) and participating in welding skills training and competitions.

In summary, welders need to master solid theoretical knowledge, skilled technical skills, comprehensive safety knowledge and rich practical experience. Only by continuous learning and practice can you gradually improve your welding skills and ensure welding quality and construction safety.