Spot Welders are used in contacting metal surfaces welded by the heat from resistance to the electricity flow. Sheets with the thickness of 0.5-3.0 mm are joined with the process of spot welding.
The spot welders tend to harden the metals being weld. A power supply, an energy storage unit such as a capacitor bank, a switch, a welding transformer, and welding electrodes are the basic components of spot welders.
These machines take care of almost welding safety requirements for various industries and are relatively easy to install. Some of the common areas where these welding machines are used are water tanks and heavy machinery.
At the first stage metals are brought into contact with the help of physical force. The welding current is then passed and metals are brought to their plastic state.
When performing a usual single pulse weld, the electric current will pass through the points of initial contact at the junction. Due to the existence of oxide layers at this crossing point the current will surge through the peaks formed by the oxide layer.
In a dual pulse spot weld, a pre-pulse eradicates the oxide layer from the objects and amplifies surface contact to generate an effective weld. Variables that are required to be controlled by spot-welding instruments are force, time, and physical force.
The new High Frequency Direct Current inverter (HFDC) system offers a programmable mechanism, which uses feedback loops to precisely deliver the provisions of a welding cycle.
To achieve quality welds, controlling the points of the welding tips and application of physical force is important. The welder sets the required power.
The welder adjusts the crystal and other materials to the tips of the electrodes and then uses the bi-level foot switch to apply power to the materials and then deliver the weld cycle.