Precautions for Welding in Space Structure Fabrication

Arc welding is a critically important fabrication process in space structure construction. The technical proficiency of steel structure welders directly impacts the quality of prefabricated components produced by manufacturers.

In steel structure production, neglecting the selection of operating voltage during welding is a common oversight. A skilled welder understands that different materials require different operating voltages, and varying angles and manufacturing requirements also demand distinct voltage settings. The most proficient welders treat welding as an art form, viewing each prefabricated component as their own masterpiece.

Whether performing filler passes, root passes, or cover passes, neglecting welding specifications is problematic. Using a single arc setting throughout the welding process risks failing to meet technical requirements and causing defects. Therefore, welders must select appropriate arc settings for different conditions during steel structure welding. This approach not only enhances weld quality but also improves work efficiency.

In space frame fabrication, welding quality directly impacts the construction of steel structure projects and subsequent delivery safety. Welding ensures the stability and integrity of prefabricated components. Consequently, steel structure welders must avoid the following two critical pitfalls:

Continuous welding without proper temperature control between layers: If the interval between layers is too long and welding begins without reheating, cracks are likely to form. Conversely, if the interval is too short and temperatures are too high, both the weld and the heat-affected zone will suffer adverse effects, leading to coarse grain structure and reduced plasticity and ductility.

When butt welding plates of different thicknesses, structural welders must verify whether the thickness difference falls within permissible limits. If outside these standards, proceeding with welding may cause stress concentrations in the welded area, leading to defects like incomplete fusion and compromising the quality of the structural weld.