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What are the mechanical requirements for steel structure welding in building construction?
Published time:
2024-11-04
In building construction, the requirements for steel structure welding machinery involve multiple aspects to ensure the efficiency, safety, and quality stability of the welding process.
In building construction, the requirements for steel structure welding machinery involve multiple aspects to ensure the efficiency, safety, and quality stability of the welding process.
I. Welding Equipment Requirements
Equipment Performance:
Welding equipment should have good stability and reliability to meet the process requirements of steel structure welding.
The equipment's control system should be accurate and sensitive to facilitate precise operation and adjustment by welders.
Equipment Selection:
Select appropriate welding equipment, such as arc welders, gas-shielded welders, and laser welders, based on the type, thickness of the welding material, and welding process requirements.
For large and complex steel structure welding, consider using automated welding equipment or welding robots to improve welding efficiency and quality.
Equipment Maintenance:
Regularly maintain welding equipment, including cleaning, lubrication, inspection, and replacement of wearing parts, to ensure normal operation and extend service life.
Establish equipment maintenance records to document the maintenance and repair history.
II. Welding Process Requirements
Welding Material Management:
Welding materials (such as welding rods and wires) should meet design and specification requirements and have factory certificates of conformity.
Welding rods should be baked before use to remove surface moisture and impurities, improving welding performance.
Welding Parameter Selection:
Based on factors such as workpiece thickness, welding layers, welding rod model, and diameter, reasonably select welding current, welding speed, and welding arc length.
Maintain the stability and consistency of the welding arc to ensure the uniformity and density of the weld.
Welding Operation Process:
Welders should be certified and trained, familiar with the operation of welding equipment and welding process requirements.
Preheating should be performed on the workpiece before welding to reduce welding stress and deformation.
Strictly follow steel structure welding standards during welding to ensure that the weld quality meets design requirements.
III. Welding Quality Control
Weld Quality Inspection:
Use non-destructive testing methods (such as radiographic testing and ultrasonic testing) to inspect welds and ensure that there are no internal defects.
Inspect the appearance quality of the weld to ensure that the weld surface is flat, smooth, and free of cracks, slag inclusions, and other defects.
Welding Deformation Control:
Use reasonable welding sequences and methods to reduce welding stress and deformation.
For large component welds, weld symmetrically from the center to the outside; for welds with large shrinkage, weld first.
Anti-deformation methods, rigid fixation methods, and hammering methods can also be used to control welding deformation.
IV. Welding Safety and Environmental Protection
Welding Safety:
Welders should wear personal protective equipment, such as welding masks, gloves, and work clothes, to prevent burns from spatter and arc radiation injuries.
The welding site should have fire and explosion prevention measures and be equipped with appropriate fire-fighting equipment.
Ventilation should be ensured during welding to prevent harmful gases and dust from harming the body.
Welding Environmental Protection:
Use low-smoke, low-harmful gas welding materials and processes to reduce environmental pollution.
Properly handle waste slag, wastewater, and other waste generated during welding to meet environmental protection requirements.
The requirements for steel structure welding machinery in building construction involve equipment performance, selection, maintenance, welding processes, quality control, safety, and environmental protection. Only by strictly following these requirements in operation and management can the quality and safety of steel structure welding be ensured.
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