Spot welding principle: spot welding is the use of positive and negative poles momentary short arc to melt the solder and the solder material, to achieve the purpose of welding.
Spot welding is the use of positive and negative poles momentary short arc to melt the solder and the solder material, to achieve the purpose of welding. The structure of spot welding equipment is very simple, which is a power transformer to translate the normal alternating current into low voltage.When welding, the workpiece welded together only in a limited contact surface, the so-called "points", and the formation of flat spherical nuclear fusion, the spot can be divided into single spot and multi-spot, multi-spot welding, using the two teams or more electrodes, forming nuclear fusion in the same supply and demand.
Category of spot welding equipment :
Spot welding can be divided into:
In accordance with the using zone, there are Universal (Universal type) and special formula
At the same time according to the number of joints welded points, there are a single-point, double-point, and multi-point;
According to conducting way, there are unilateral and bilateral;
Transmission pressing mechanism according to points, there are foot motor - Cam, pneumatic, hydraulic and hybrid (gas hydraulic fit);
In accordance with the operating characteristics of points, there are non-automated and automation;
Follow the installation method of points, there are fixed, mobile or portable (suspended);
According to the movable electrode welder (general upper electrode) in the direction of movement points,there are a vertical stroke (electrode in a straight line) and circular itinerary;
According to the power supply mode, there are frequency welding machine (using 50 Hz AC power), pulse welding (DC pulse welding, energy storage welder, etc.) and frequency welder (such as low-frequency welder).