Resistance welding, also known as electric resistance welding, is a method of joining metals by exerting pressure and delivering a powerful electric charge. This dissoves the metals and creates a powerful welding joint, forging them together.
It is routinely used in a diverse array of applications, such as the fabrication of steel pipes and even the manufacturing of automotive components.
In a broad sense, it is a metalworking technique wherein the workpiece is mounted under precise electrode pressure. The contact surface seen between multiple metal parts is melted by the resistance heat produced whenever the electric current is passed through the workpiece to complete the linkage
It emerges in a myriad of shapes and sizes, so it requires no other substances, making it a very cost-effective approach.
When performing electric resistance welding, the mechanical properties of the welded machined surface are a prerequisite to meet consistent metalworking quality. As a direct consequence, before actually welding, the contact surface between both electrode and workpiece and the workpiece must always be kept clean.
Resistance welding activities with various applications include spot welding, seam welding, and butt welding. Each of these has a specific metalworking application that makes it an ideal choice for a particular circumstance. Let us check them out!
• Resistance Spot Welding
This metalworking procedure usually combines two metallic sheets whilst incorporating temperature and pressure from a current flow to a welded joint and widely utilized, particularly in the automotive industry.
• Resistance Seam Welding
It’s commonly utilized to make a wafer-thin sheet, and it’s traditionally unsuitable for aluminum alloys—a type of spot welding that differs from the standard. Typically, spot welding electrodes are replaced with wheels.
• Resistance Projection Welding
Projection welding is typically used only for welds, especially if it involves chunkier metals than thinner metal parts. It is predominantly used in the electronics, car manufacturing, and construction sectors. A type of resistance welding in which the force of electricity and the passage of time are concentrated on raise segments to fuse things together.
• Butt welding
There are two sorts of butt welding: upset butt welding and flash butt welding. The bitter butt-welding method is commonly used on rods, pipelines, and several other components of standardized segments. Flash butt welding is widely used in the production of steel containers and the attachment of hardened steel shanks to fast-speed drill bits and reamers.