Accelerometer Weld Head for Real-Time Spot Weld Defect Detection
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Solution Overview
Problem
Resistance spot welding technologies face challenges in efficiently detecting welding defects during opposed, parallel gap, and step welding configurations, leading to potential defects in metal joints.
Innovation Solution
A weld head equipped with accelerometers and processing circuits that analyze acceleration data to determine if welding defects occur by identifying data points outside a threshold range, enabling real-time detection and differentiation between opposed, parallel gap, and step welding configurations.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If traditional resistance spot welding is used without sensors, then the welding process is simple and fast, but welding defects cannot be detected in real-time
Solution Approach 1:
The patent combines multiple welding configurations (opposed, parallel gap, and step welding) into a single weld head assembly. The weld head includes a first arm with a first electrode and a second arm with a second electrode, allowing the same hardware to perform multiple welding operations by reconfiguring the electrode positions and orientations.
Solution Approach 2:
The weld head is designed as a universal device that can execute multiple types of resistance spot welding (opposed, parallel gap, and step welding) using the same physical components. The arms and electrodes can be positioned and oriented differently to achieve various welding configurations, eliminating the need for separate welding stations for each type.
2Productivity
If multiple welding stations are used for different welding configurations, then each welding type can be optimized, but production space and time increase
Solution Approach 1:
The weld head is designed as a universal device that can execute multiple types of resistance spot welding (opposed, parallel gap, and step welding) using the same physical components. The arms and electrodes can be positioned and oriented differently to achieve various welding configurations, eliminating the need for separate welding stations for each type.
Solution Approach 2:
The weld head incorporates movable and adjustable arms that can dynamically reposition electrodes between different welding configurations. The first and second arms can be positioned at different angles and distances, allowing rapid transition between opposed, parallel gap, and step welding modes without requiring physical reconfiguration of the entire welding system.
3Measurement precision
If accelerometers are integrated into the weld head, then welding defects can be detected, but the device complexity increases
Solution Approach 1:
The patent combines multiple welding configurations (opposed, parallel gap, and step welding) into a single weld head assembly. The weld head includes a first arm with a first electrode and a second arm with a second electrode, allowing the same hardware to perform multiple welding operations by reconfiguring the electrode positions and orientations.
Solution Approach 2:
The system uses accelerometers to capture acceleration data during welding operations, and processing circuits analyze this data to detect welding defects. The feedback mechanism compares the acceleration patterns against expected ranges to identify anomalies such as missed welds, double welds, or improper electrode contact, enabling real-time quality control.
4Reliability
If real-time defect detection is implemented, then welding quality improves, but processing complexity increases
Solution Approach 1:
The system uses accelerometers to capture acceleration data during welding operations, and processing circuits analyze this data to detect welding defects. The feedback mechanism compares the acceleration patterns against expected ranges to identify anomalies such as missed welds, double welds, or improper electrode contact, enabling real-time quality control.
Solution Approach 2:
The welding system performs self-diagnosis by automatically analyzing its own operation data through the accelerometers and processing circuits. The system can identify its own defects and quality issues without requiring external inspection equipment or manual evaluation, making the quality control process autonomous.
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 solution allows for accurate and timely detection of welding defects, improving the quality of metal joints by identifying and addressing issues during the welding process, thereby enhancing production efficiency and reducing the need for additional welding stations.
Implementation Method 1
The weld head may include at least one accelerometer secured adjacent one of the electrodes. The accelerometer may be configured to gather accelerometer data of the electrode(s) as the electrode(s) execute a RSW.
Data Source
AI summary
Aspects of this disclosure relate to a welding system that is configured to execute opposed, step, and parallel gap resistance spot welds (RSW) and associated methods. The system may be configured to switch bases to switch between an opposed weld configuration, a step weld configuration, and a parallel gap configuration. The system may include an accelerometer that is secured to the weld head adjacent one of the electrodes. The system may use the accelerometer to determine whether or not an RSW was defective. Acceleration data may indicate a defective weld when it includes acceleration data that is outside of a threshold range of acceptable acceleration data.