Energy storage spot welding principle

What is the working principle of spot welding?

The working principle of spot welding is based on the thermal effect of current. In spot welding, two workpieces to be welded are first clamped by the upper and lower electrodes under the action of a welding clamp or welding gun cylinder.

What happens when a weld spot is welded?

When a weld spot is being welded, a part of the current bypasses the welding area and forms another circuit because the workpiece and the welding arm are in contact. Shunting reduces the current flowing through the welding area, resulting in insufficient heating of the weld spot and quality issues such as poor welding.

What are the heating characteristics of spot welding?

Heating Characteristics During Spot Welding: During spot welding, the total heat Q produced by the current passing through the workpiece resistance and contact resistance can be divided into two main parts.

What is a spot welder used for?

of larger, more powerful, and more costly welding transformers.Spot welding is most commonly used in the automobile manufacturing business, where it is nearly routinely used to join the sheet metals of car frames. Spot welders can also be fully automated and many o

What is resistance spot welding?

Resistance spot, ultrasonic or laser beam welding are mostly used for connecting battery cells in the production of large battery assemblies. Each of these welding techniques has its own characteristics depending on the material properties and contact geometry. Cell casing and terminal dimensions may constrain possible contact geometries.

How much power does a spot welding machine need?

⑤ Large welding machine power is needed. The most prominent issues are the high power of the welding machine and the large electrode consumption. Generally, for spot welding of low carbon steel plates with a thickness greater than 5mm, a power of more than 200KVA is required, and the supplied electrode pressure and current are very large.