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Welding current, energization time, pressing pressure, data surface condition, etc. are all important factors affecting the welding of the inductive spot welding head. The welding current, the energizing time and the pressing force of the inductive spot welding head are called the three elements of spot welding. The following is a brief explanation of the actual impact of the elements on welding :
1. The effect of current on heat production is greater than both time and pressure. Therefore, it is a parameter that must be strictly controlled during the welding process. The welding current is too small to form a nuclear core. The nuclear core size is small and the welding point strength is small. The welding current is too large, which may cause the welder.
The parts are overheated, splashed, and the indentation is too deep .
2, the impact of welding time
In order to ensure the core size and solder joint strength, the welding time and the welding current can compensate each other within a certain range. In order to obtain a solder joint of a certain strength, it is possible to select a large current and a short time (strong condition, also called a hard standard), and also a small current and a long time can be selected.
(Weak body condition, also called soft standard)
3, the impact of electrode pressure
The electrode pressure has a significant effect on the total resistance between the two electrodes. The electrode pressure is small, and splashing occurs simply, and as the electrode pressure increases, the total resistance decreases. When the electrode pressure is increased and the welding current is kept constant, the heat loss due to the reduction of the total resistance cannot be compensated.
The welding pressure is increased and decreased. The solution is to increase the welding power and increase the welding power.
4. Influence of electrode shape and data function Because the touch area of the electrode determines the current density, the resistivity and thermal conductivity of the electrode data are related to the occurrence and loss of heat. Therefore, the shape and data of the electrode have significant composition on the quenching. influences. Following the deformation and wear of the electrode lie, the touch area increases and the solder joint strength decreases. Pay attention to the protection of the electrode during the operation (spot welding head)