Optical Weld Puddle Feedback for Stable Penetration Control
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Solution Overview
Problem
Unpredictable variables in the welding environment make it difficult to accurately determine and control welding parameters in continuous welding operations, such as voltage, current, and travel speed, which can lead to inconsistencies in weld bead profile and penetration depth.
Innovation Solution
A welding system that includes a sensor system to detect the light intensity of the weld puddle, using opto-electrical components to generate a voltage output signal, which is then used by a controller to adjust welding parameters like travel speed and power supply to maintain consistent weld penetration depth and bead height.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Manufacturing precision
If manual or automated welding operations are performed without real-time feedback, then welding parameters can be pre-set or operator-controlled, but unpredictable variables in the welding environment cause inconsistencies in weld bead profile and penetration depth
Solution Approach 1:
The patent implements real-time optical feedback by detecting light intensity from the weld pool and using this information to dynamically adjust welding parameters. The sensor system continuously monitors the weld pool characteristics and feeds this information back to the control system, which then modifies welding parameters to maintain consistent weld quality despite environmental variations.
Solution Approach 2:
The patent replaces manual operator control or simple pre-set automated control with an optical sensing and control system. Instead of relying on operator skill or fixed parameters, the system uses optical detection of weld pool characteristics to automatically adjust welding parameters, substituting mechanical/operator-based control with sensor-based intelligent control.
2Manufacturing precision
If real-time sensor feedback systems are implemented to control welding parameters, then weld quality consistency is improved, but system complexity increases
Solution Approach 1:
The patent uses light intensity as an intermediary parameter to indirectly measure weld pool characteristics. Instead of directly measuring complex parameters like penetration depth or bead profile, the system uses optical detection of light intensity from the weld pool as a proxy, which simplifies the sensing requirement while still providing useful feedback for control.
Solution Approach 2:
The patent changes the control approach by using optical parameters (light intensity) rather than direct mechanical or thermal measurements. This parameter transformation allows for simpler sensing while maintaining effective control over welding quality, as optical detection is less intrusive and can be implemented with simpler sensors compared to direct measurement of weld pool physics.
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
The system provides real-time feedback to adjust welding parameters, ensuring consistent weld quality by compensating for deviations in penetration depth and preventing errors like burn-through, thereby enhancing the structural and aesthetic qualities of the weld.
Implementation Method 1
The sensor generates a voltage output signal based on the amount of light received from the weld puddle
Data Source
AI summary
A welding system includes a welding torch, a power supply, one or more sensors, and a controller is provided. The welding torch advances an electrode toward a workpiece in a first direction. The power supply provides a flow of electricity to the electrode for generating a welding arc between the electrode and the workpiece. Generating the welding arc generates a weld puddle behind the welding arc as the electrode moves in the first direction. The sensor generates a voltage output signal based on the amount of light received from the weld puddle. The controller is communicatively coupled with the sensor to receive the voltage output signal, and the sensor controls a welding parameter of the welding system based the voltage output signal.