Monitoring of Body Shop Welding/Joining
Background
- GMAW (Gas Metal Arc Welding) is widely used as a important joining process in automobile fabrication line.
- However, GMAW is prone to various weld discrepancies, resulting in high scrap rate and rework.
- Therefore, the monitoring system is needed to improve weld quality and to reduce manufacturing cost.
Objective
- To develop a network based weld quality monitoring system to automatically detect and classify weld discrepancies.
Approach
- Measurement of electric signals (voltage, current) during welding
- Signal processing of electric signals
- Detection of transfer mode changes
- Detection of weld discrepancies using STFT and CUSUM control chart
- Visualization of weld bead
- Programming of Graphic User Interface
Researcher
