Wire Mesh Spot Welding Machine

Automatic spot welding production line and automatic arc welding production line have many applications in various metal joint fields. From the inside, it is mainly differentiated from the power supply, from the outside, it is mainly whether there is an arc, and even the size of the robot that grabs the welding torch can be differentiated.

The formation of the solder core depends on the current heating through the resistance of the workpiece itself, and the pressure is rapidly applied to the workpiece when it is close to the melting point, thus forming the solder core. During the size of the current, discharge time, the size of the pressure need to cooperate with each other. For example, the size of the current will directly affect the welding fastness, the current will produce splashing, welding through and other phenomena; Small current will appear virtual welding; Long welding time will cause the workpiece to overburn discoloration, electrode wear is too large; Short time will appear virtual welding, fusion diameter is not enough; High pressure will cause deformation, virtual welding; The pressure is small, there will be splashing, sticking electrode phenomenon; In short, the process parameters of a perfect welding need to be continuously verified, and the actual operation can be finally confirmed.

The traditional power supply of spot welding machine is power frequency power supply, two-phase input, AC output, the primary current is large when working, the power grid voltage drop is obvious, and the power factor is only 65%, which is very high for the factory grid, otherwise it is difficult to normal welding production; The current mainstream medium frequency spot welding machine, the input is three-phase, so that the power grid voltage can be balanced, through the inverter box rectification, filtering, upfrequency, inverter, and then through the transformer secondary secondary tube rectification output, the power factor can reach more than 90%, the final output is DC, the maximum energy conversion and use, so that its demand for the grid to the minimum;

It is better to use medium-frequency inverter spot welding machine in high-carbon steel welding, which can achieve soft specifications and accurately control the output of welding heat, and can also use multi-pulse discharge mode to make the growth of molten core in a relatively stable process.