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What Is The Relationship Between The Spot Welding Machine And The Electrode
Jun 14, 2018

When the workpiece and electrode are affirmed, the resistance of the machine depends on the resistivity of the workpiece. Therefore, the resistivity of the machine is the tension of the welded material. Instead, the electrical conductivity of the metal with high resistivity (such as stainless steel) has a good electrical conductivity (such as aluminum alloy) with low resistivity. Therefore, the spot welding machine produces heat easily and is difficult to heat in the spot welding of stainless steel. The spot welding machine produces heat and heat easily when welding the aluminum alloy. In the spot welding, the former one can be small current (thousands of Amperes), and then the latter must use a large current (Ji Wananpei). Resistivity depends not only on the type of metal, but also on the penalty state of heat treatment, and on the processing method and temperature.
In order to assure the nugget size and the strength of the solder joint, the welding time and the welding current can be mutually supplemented in the affirmative category. In order to obtain the positive strength of the solder joints, large current and short time (strong conditions, also known as hard examples) can be accepted, and small current and permanent (weak conditions, also called soft examples) can be accepted. Choosing a hard example or a soft example depends on the performance and thickness of the metal and the power of the welder. Spot welding machines have a lower and lower limit on the current and time required for different performance and thickness metals.