Common base plate materials include cold-rolled steel, galvanized steel, and stainless steel. Some products also use aluminum alloy. Welded nuts come in various types, such as ordinary carbon steel and stainless steel. Different material combinations result in significant differences in processing difficulty and actual performance. Carbon steel substrates paired with carbon steel welded nuts offer low processing difficulty and cost advantages, making them the preferred choice for most common working conditions. Stainless steel substrates with stainless steel nuts provide stronger corrosion resistance, making them suitable for humid, outdoor, or slightly corrosive environments. However, stainless steel welding is prone to thermal deformation, requiring stricter process control. Aluminum alloy substrates with welded nuts are more difficult to weld, demanding stricter welding equipment parameters. They are mostly used in lightweight equipment components, resulting in higher overall processing costs.
Its core function is to provide reliable threaded assembly points. Many sheet metal housings and bracket bodies are inconvenient to tap directly due to limited sheet thickness. Directly tapped threads lack strength and are prone to stripping after repeated disassembly and assembly. Welding the nut firmly to the sheet metal substrate creates a stable threaded hole, facilitating subsequent bolt tightening of other components. If the weld strength is insufficient, the nut may fall off or rotate during bolt tightening, causing assembly failures in the entire batch of workpieces. On-site debugging consumes considerable time, a common pitfall in many projects.
Controlling the welding process is crucial for this product. Mainstream processes on the market include resistance spot welding and projection welding; some thick plate structures also utilize arc welding. Projection welding is the most common method for welding nuts. It relies on the fusion of the nut's own projection points to achieve a bond. This method results in relatively small welding deformation and uniform weld point distribution, making it suitable for mass production. During production, it's crucial to control the welding current, pressure, and welding time. Inappropriate parameters can lead to problems such as incomplete welds, weld penetration, and nut misalignment. Incomplete welds are difficult to detect visually and only detach after tightening, posing a hidden risk. Weld penetration damages the workpiece's appearance and structural integrity. In some demanding applications, torque testing is performed to verify the nut's tightening torque capacity, ensuring it won't loosen during actual use.
After welding, subsequent processing can be performed, such as grinding, deburring, sandblasting, spraying, and galvanizing. It's important to note that welding will damage the plating at the weld point on galvanized sheets, requiring proper rust prevention treatment to prevent rusting at the weld point. We can handle the entire process from material preparation, bending, nut welding, to subsequent surface treatment based on customer drawings or samples. We can also control thread specifications and nut position tolerances to ensure smooth assembly.
We can undertake both large-scale standardized production and small-batch non-standard customization. The selection of sheet metal, nut specifications, and surface treatment can all be adjusted according to the specific project requirements. If you have any procurement or outsourcing needs, please feel free to contact us for further discussion.
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