Arc-welding furnace hearth dynamic characteristic vision sensing method

Abstract

The present invention belongs to the welding and cutting technology. The present invention includes welding arc light to illuminate the welding melting bath, optical filter to intercept light in specific wavelength range form reflected electric arc light as imaging light source, dimmer to regulate light strength, planar reflector to change light transmission direction, and CCD video camera and common optical lens to image the information carved on the right side and the back side of the welding melting bath to the target plane of the same CCD video camera. The present invention can take rich signals of welding melting bath and obtain the clear image of the right side and the back side of the melting bath during welding course so as to monitor and control the welding course effectively.

Description

technical field [0001] The invention relates to a visual information sensing method, in particular to a visual sensing method for arc welding molten pool dynamic information, which belongs to the field of welding and cutting. Background technique [0002] Modern industrial production puts forward higher requirements on the quality of welding assembly. In order to adapt to changes in the form of workpieces and the environment, closed-loop control of the welding process must be carried out, and how to sense accurate welding process quality information has become the key to welding quality control technology. The visual image of the welding pool contains a wealth of welding quality information. Using the visual sensor to obtain the image of the molten pool, information such as the direction of the weld seam, the size of the gap, the width of the weld pool, and the height of the weld seam can be obtained, and then the weld penetration and welding can be performed. seam forming ...

AI Technical Summary

Problems solved by technology

However, the above research and application have great limitations

First of all, only the front image of the weld pool can be obtained by observing from one side of the front of the weld, but in the welding process, the penetration of the weld and the formation of the back of the weld cannot be fully understood only from the image of the front weld pool, so it is impossible to comprehensively Monitor welding quality

Secondly, using a laser as an auxiliary imaging light source requires additional hardware, such as a power supply, laser, etc. These hardware are fixed at the end of the welding torch, which greatly affects the space and flexibility of the welding torch during the welding process.