What is it about?
The purpose of this study is to design a robotic inline measurement system for spot welding quality control to achieve process requirement without any operator during the manufacturing flow. A robot manipulator carries a stereo-camera and an ultrasonic control probe. The center position of the spot welding point is determined by evaluating the results of the edge, gradient and symmetry approaches from the methods proposed up to now in the literature to increase reliability. The center position of the spot welding point, determined in the camera reference plane, is transferred to the robot base plane coordinates with the hand-eye calibration proposed in this manuscript. Weld quality is checked by the ultrasonic test probe located at the spot welding point.
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Why is it important?
While operators can only control welding quality, the developed station can also evaluate the quality based on geometric accuracy by processing the deviation of the position of the spot welding points. The proposed calibration method and the results of other methods in the literature are presented in this study by comparing it with synthetic data in simulations and in practical application.
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This page is a summary of: In-line stereo-camera assisted robotic spot welding quality control system, Industrial Robot the international journal of robotics research and application, January 2018, Emerald,
DOI: 10.1108/ir-06-2017-0117.
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