Welding apparatus, dressing apparatus, and welding method
By using an asymmetric electrode cap structure and a graded current temperature control method, the problem of oxide layer hindering current conduction in aluminum alloy welding was solved, achieving seamless spot welding and stable weld nugget formation, thus improving welding quality and economy.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- GUANGZHOU AUTOMOBILE GROUP CO LTD
- Filing Date
- 2026-06-01
- Publication Date
- 2026-07-17
AI Technical Summary
Aluminum alloys are prone to forming a dense oxide layer during welding, which leads to unstable welding current conduction and rapid heat loss during welding, making it difficult to achieve high-quality, seamless spot welding.
An asymmetric electrode cap structure is adopted, including a first electrode cap and a second electrode cap. The first electrode cap is used for spot welding without leaving marks on the outer surface, and the second electrode cap has a central boss to pierce the oxide layer. It is combined with a welding method of graded current and segmented temperature control.
It achieves seamless spot welding on the surface, stable weld nugget formation, improved welding quality and strength, and reduced electrode cap wear and usage costs.
Smart Images
Figure CN122400747A_ABST