Factors Affecting the Distance Between Spot Welds in Mid-Frequency Spot Welding

The spacing between spot welds in mid-frequency spot welding must be designed reasonably; otherwise, it will affect the overall welding effect. Generally, the spacing is around 30-40 millimeters. The specific distance between spot welds should be determined based on the specifications of the workpiece. Overcrowding or too much spacing is both unreasonable.

Factors affecting spot weld distance include:

Sequence of Welding:

When welded points are distributed on both sides, the current distribution ratio is larger on one side than on the other.

Surface Condition of Workpiece:

Improper surface treatment, such as oil contamination and oxidation layers, increases contact resistance, leading to increased total resistance in the welding area and relatively reduced branch resistance, resulting in increased current.

Non-welding Area Contact between Electrode and Workpiece:

Contact between electrodes and non-welding areas can sometimes cause significant current diversion and may even damage the workpiece.

Poor Assembly or Over-tight Assembly of Workpieces:

Excessive contact between non-welding areas can cause significant current diversion.

Characteristics of Single-Sided Spot Welding Process:

When both welded parts have the same thickness, if the branch impedance is smaller than the welding impedance, the current diversion will be greater than the current passing through the welding spot.

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