Resistance Welding Defects to Look Out for in Wire Baskets
Datetime:2016-09-08 Hits:
Resistance welding is an excellent way to join two pieces of stainless steel wire to create a strong, durable bond without relying on a separate welding material. When done right, resistance welding can join small pieces of metal, such as those used in stainless steel wire baskets, quickly and without defect.
However, resistance welding can be a surprisingly tricky process, especially for the uninitiated. When resistance welds are done incorrectly, it can lead to a few different defects—ones that manufacturers should look out for:
1: Spattering of mesh baskets
While weld spatter is common for processes that rely on a separate substance to act as a bonding agent, in resistance welding, it’s a sign of a defective weld. Splatter is often caused by the use of too strong a current to form the weld.
Here, the spattered material is loose metal that was accidentally burned away by intense heat. The loss of material at the weld site can weaken the overall strength of the finished product.
2: Indented Surfaces
Creating consistent spot welds requires incredibly precise control over the pressure applied to the metal surfaces to be joined. When too much pressure is applied, resistance to electrical current decreases, keeping the metal from reaching proper welding temperature.
When inspecting a resistance-welded object, heavy indentations can be an indication that parts were pressed too tightly together. This may indicate a weak weld that wasn’t properly executed.
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