Spot Weld Head Accelerometer for Real-Time Defect Detection
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Existing resistance spot welding technologies lack efficient methods to detect welding defects in real-time, particularly in opposed and parallel gap configurations, which can lead to substandard welds and increased production costs.
Innovation Solution
The apparatus incorporates a resistance spot weld head with integrated processing circuits and accelerometers to gather acceleration data during welding. This data is analyzed to determine if the welding process has resulted in defects by comparing acceleration values to predetermined threshold ranges.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If traditional resistance spot welding is performed without real-time monitoring, then the welding process is simple and fast, but welding defects cannot be detected and substandard welds are produced
Solution Approach 1:
The patent combines the accelerometer sensor directly with the welding electrode assembly, merging the monitoring function into the existing welding tool. This integration allows real-time acceleration data collection during welding without requiring separate monitoring equipment, thereby improving weld quality while minimizing system complexity
Solution Approach 2:
The system implements real-time feedback by continuously monitoring acceleration data during the welding process and comparing it against predetermined thresholds. When abnormal acceleration patterns indicating defects are detected, the system can immediately identify and correct issues, ensuring high weld reliability
2Reliability
If real-time welding defect detection is implemented using sensors and processing circuits, then welding quality improves, but the device complexity and cost increase
Solution Approach 1:
The welding system performs self-diagnosis by using the accelerometer to monitor its own operation during welding. The processing circuits analyze acceleration data generated during normal welding operations to automatically detect defects, allowing the system to monitor itself without requiring external inspection equipment or complex additional manufacturing processes
Solution Approach 2:
The patent replaces traditional post-weld inspection methods with real-time electronic monitoring using accelerometers and processing circuits. This substitution enables continuous quality assurance during the welding process itself, improving reliability while avoiding the need for separate manual or mechanical inspection systems
3Loss of time
If acceleration data is collected and analyzed during welding, then welding defects can be identified immediately, but data processing time and complexity increase
Solution Approach 1:
The system monitors only the critical acceleration parameters necessary for defect detection rather than analyzing all possible welding parameters. By focusing on specific acceleration thresholds and patterns that indicate defects, the system achieves rapid real-time detection without requiring complex comprehensive data analysis
Solution Approach 2:
The patent establishes predetermined acceleration thresholds and defect criteria before the welding process begins. This preliminary setup allows the processing circuits to immediately compare real-time acceleration data against known good/bad criteria during welding, enabling instant defect identification without requiring complex real-time decision algorithms
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 effectively detects welding defects in real-time, improving the quality of welds and reducing production costs by enabling immediate identification and correction of welding issues.
Implementation Method 1
an accelerometer securely attached to the first electrode at a location adjacent to the first electrode. The one or more processing circuits are configured to cause the accelerometer to gather a PGW set of acceleration data of the first electrode during the PGW
Data Source
Figure 1
Figure 2
Figure 3A~3C
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.