Resistance Welding

Resistance welding is a term that includes several welding methods, with a particular in common. The experts at Minifaber, who have been involved in cold sheet metal working for years, including resistance welding of metals, explain everything to you.

Resistance welding involves melting and joining two metals by means of the heat generated by a resistance; through the resistance passes a certain amount of electrical energy that, spreading into the two sheets to be welded, heats and dissolves them.

 

The parameters to consider in resistance welding

Precisely because it uses resistances, resistance welding must take into account certain parameters, which must be monitored to obtain a result in a workmanlike manner.

These variables are in particular 4:

• the materials to be welded
• the amount of energy needed to melt them down
• the (mechanical) welding force required to join them together
• the minimum and maximum time required to start and finish the operation.

 

Types of resistance welding

Resistance welding can be of different types:

• spot welding - the sheets to be welded are placed on top of each other, with the surfaces in contact at a point along a line
• Projection - projections (or bugs) are islands with a low thermal mass that ensure the right balance in difficult applications
• head - the pieces to be welded are held in two clamps, one of which is movable, and are pressed together
• roller - the workpieces to be welded are pressed by two rollers.

 

Resistance welding with Minifaber

Resistance welding is often automated and used mainly in series production in the automotive sector or in the production of household appliances.

Minifaber provides a resistance welding service carried out internally from start to finish: we are available for machining both small and large quantities, both to create semi-finished products and to produce finished and complex products.