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Spot welding machine using a standard strength

Spot welding machine in order to ensure the core size and solder joint strength, welding time and welding current can complement each other in a certain range, in order to obtain a certain strength of solder joints, high current and can be used a short time (strong condition, also known as the hard specification), or low current and long (weak condition, also known as soft specification).

Specification for selection of hard or soft norms, depending on the properties of metals, thickness, and the power of the welding machine, for different properties and thickness of metals current and the time that is required, there is an upper and lower limit, when used to prevail.