Resistance spot welding method and resistance spot welding device
The resistance spot welding method addresses the issue of non-uniform welds in stacked metal plates by using a series of energization controls to concentrate current flow and promote uniform melting, resulting in high-quality welds with reduced spatter.
Patent Information
- Application Number
- JP2023208610
- Authority / Receiving Office
- JP · JP
- Patent Type
- Applications
- Current Assignee / Owner
- Filing Date
- 2023-12-11
- Publication Date
- 2025-06-23
- Estimated Expiration
- 2043-12-11
AI Technical Summary
Resistance spot welding of stacked metal plates with varying resistances, tensile strengths, or plate thicknesses often results in non-uniform weld nuggets and insufficient penetration due to heat generation variations.
A resistance spot welding method involving a series of energization controls: first, a constant current is applied to promote current concentration; second, the current decreases to minimize heat generation; third, a higher current is applied to promote shunting and wide-range melting; and fourth, a constant current is maintained to finalize the weld, thereby reducing variations in melting across the plates.
This method achieves high-quality welding by concentrating current flow, promoting uniform melting, and reducing variations in material properties across the stacked metal plates, while also suppressing spatter.