Device and method for visual detection of welding quality of robot

Abstract

The invention provides a device and a method for visual detection of welding quality of a robot. The device and the method are characterized in that a visual gun is connected with a welding arm, moves along with a welding gun head, observes welding points and sends scanned picture information to a visual system. The visual system compares the received picture information with standard recipe data and detects and judges weldment splicing errors before welding, welding point quality after welding and a welding process in real time. The method includes: building splicing error detecting standard recipe data, building a welding point standard recipe after welding, building detecting standard recipe data during the welding process, obtaining tracks of the welding points before welding and weldment splicing error picture information, welding point picture information after welding and picture information during the welding process, and comparing the information with the standard recipe data. The device and the method have the advantage of achieving real-time detecting of the welding quality and closed loop feedback control, the detection device is matched with the robot directly to be installed, extra servo follow-up devices are not required to be designed and installed, and investment of a large amount of auxiliary devices is saved.

Description

technical field [0001] The invention relates to the technical field of welding quality detection, in particular to a robot welding quality visual detection device and a detection method thereof. Background technique [0002] Arc welding is an important process in industrial production, and welding quality inspection is an important process link in the welding process. At present, the link quality testing methods mainly include: destructive testing, including mechanical performance testing, chemical analysis testing, metallographic testing; non-destructive testing, including appearance testing, radiographic testing, ultrasonic testing, magnetic testing, etc. These detection methods are all detected after the welding is completed. [0003] Modern industrial production has high requirements on welding efficiency. Automatic welding is an important part of today's industrial automation, and real-time quality inspection and control in the welding process is a technical focus and...

AI Technical Summary

Problems solved by technology

[0004] However, in the prior art, when a robot is used for welding, the visual sensor is usually installed on a follower mechanism controlled by a servo mechanism to detect the welding quality, which requires a large amount of auxiliary equipment to be invested.

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