Double shield TIG welding method and double shield TIG welding apparatus
JP2026009499APending Publication Date: 2026-01-21DAIHEN CORP
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Patent Information
- Application Number
- JP2024109403
- Authority / Receiving Office
- JP · JP
- Patent Type
- Applications
- Current Assignee / Owner
- Filing Date
- 2024-07-08
- Publication Date
- 2026-01-21
AI Technical Summary
Technical Problem
Conventional double-shielded TIG welding methods experience fluctuations in cleaning width, leading to poor weld quality, particularly when welding aluminum and aluminum alloys.
Method used
A double-shielded TIG welding method and apparatus that control the flow rate of outer gas based on the instantaneous or average value of electrode positive polarity voltage, adjusting the gas flow rates during different phases of the welding process to stabilize the cleaning width.
Benefits of technology
The method and apparatus effectively suppress fluctuations in cleaning width, resulting in improved welding quality by maintaining a consistent and appropriate cleaning width during the welding process.
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Smart Images
Figure 2026009499000001_ABST
Abstract
To obtain excellent welding quality by suppressing the fluctuation of a cleaning width during welding in a double shield TIG welding method.SOLUTION: In a double shield TIG welding method using a welding torch provided with an inner nozzle for jetting an inner gas and an outer nozzle for jetting an outer gas, an AC welding voltage formed of an electrode negative polarity voltage during an electrode negative polarity period and an electrode positive polarity voltage during an electrode positive polarity period is outputted, and a welding arc is generated to perform welding, wherein a flow rate F o of the outer gas during a period from time t3 to time t6 is controlled based on an instantaneous value or an average value of the electrode positive polarity voltage.SELECTED DRAWING: Figure 3
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