In order to ensure the nugget size and solder joint strength of the medium frequency spot welding machine, the welding time and welding current can complement each other within a certain range. In order to obtain a solder joint with a certain strength, the following two points are generally achieved.
That is, large current and short time (called hard standard), and small current and long time (called soft standard) can also be used. Use hard gauge or soft gauge, depending on the material and thickness of the metal and the power of the welder used. The current and time required for metal welding by a spot welding machine have a reference point, which should be used as a guide when using it. In order to ensure welding quality, the importance of spot welding machine electrodes is generally reflected in the following points:
1. The electrode pressure of the intermediate frequency spot welding machine has a significant impact on the total resistance R between the two electrodes. As the electrode pressure increases, R decreases significantly. In this way, the welding current increases only slightly, and the influence is due to the decrease of R. The welding heat caused by excessive heat.
2. The strength of solder joints always decreases as the welding pressure increases. The solution is to increase the welding pressure. Generally, when the diameter of the electrode end face of the spot welding machine is constant, the resistance of the workpiece depends on its resistivity.
3. Metals with high resistivity have poor electrical conductivity (such as stainless steel) and metals with low resistivity have good electrical conductivity (such as aluminum alloys).
In this way, the resistivity not only depends on the type of metal, but also on the heat treatment state, processing method and temperature of the metal. Such electrode pressure has a significant impact on the total resistance R between the two electrodes. As the electrode pressure increases, R decreases significantly, but the increase in welding current is not large. It cannot affect the resistance caused by the decrease in R. Heat production is reduced. Therefore, the strength of welding joints in medium-frequency spot welding machines always decreases as the welding pressure increases. The solution is to increase the welding current while increasing the welding pressure.
Suzhou Agera Automation Equipment Co., Ltd. is an enterprise engaged in the development of automated assembly, welding, testing equipment and production lines. It is mainly used in home appliance hardware, automobile manufacturing, sheet metal, 3C electronics industries, etc. According to customer needs, we can develop and customize various welding machines, automated welding equipment, assembly and welding production lines, assembly lines, etc., to provide appropriate automated overall solutions for enterprise transformation and upgrading, and help enterprises quickly realize the transformation from traditional production methods to mid-to-high-end production methods. Transformation and upgrading services. If you are interested in our automation equipment and production lines, please contact us: leo@agerawelder.com
Post time: Jan-08-2024
