Identifying method and device for welding joints of corrugated plates of containers and welding control system

Abstract

The invention relates to an identifying method and device for welding joints of corrugated plates of containers and a welding control system. The identifying method for the welding joints of the corrugated plates of containers includes steps of firstly, projecting at least one beam of surface lasers, and forming two channels of deflected laser lights arranged on two sides of the welding joints by each beam of surface layer at the welding joints; secondly, acquiring deflected laser light information generated by the surface layer by an industrial image sensor; thirdly, calculating the size and the position of the welding joints; fourthly, moving the surface laser along the welding joints to change the projection position of the surface laser on the welding joints, and repeating the first step to the second step. When the surface layer moves out of the welding joints, a discrete welding joint position coordinate curve of the welding joints and the size of the welding joint corresponding to each point on the curve are obtained. The identifying method and device can accurately identify the positions and the size of the welding joints, control accuracy of welding positions is improved, and welding quality is guaranteed.

Description

technical field [0001] The invention relates to a welding technology, in particular to a method for identifying weld seams of container corrugated plates. Background technique [0002] The production process of the container is dominated by arc welding. A lot of smoke, dust, strong light and noise surround the workstations where the arc welding operations are relatively concentrated, which can easily cause fatigue and cause relatively great harm to the human body. It is important to reduce the exposure of personnel to harsh environments. It is one of the motivations to seek the improvement of production methods, especially in today's rising labor costs. The container corrugated plate is a plate with a wavy cross-section. Due to the complexity of the welding model of the container corrugated plate and the actual welding conditions, it is constantly changing with various unpredictable interference factors, such as strong arc light, high temperature, Splash, mechanical vibrati...

AI Technical Summary

Problems solved by technology

The contact sensor converts the change of the welding seam into the position change of the guide rod or guide wheel, and converts it into an electrical signal. Due to its stable performance and low cost, the sensor has been widely used in production, but due to the limitation of tracking accuracy and speed , is no longer suitable for high-precision, high-speed welding fields

The arc sensor uses the parameters of the arc itself as the tracking target, and can respond to changes in the weld seam in real time, but the detection accuracy is easily affected by the droplet transfer form and spatter during the welding process, especially in the welding of butt joints and lap joints of thin plate weldments , the application method is difficult to master

In contrast, the optical sensor has the characteristics of rich information, high precision, and wide detection range, which has gradually attracted people's attention, and has been widely used in the field of welding production, which provides favorable conditions for the realization of welding automation , but the existing optical sensor is mainly based on the laser ranging method to identify the weld, the laser used is a line laser, which can only obtain the position information of a certain point of the weld, but cannot accurately obtain the spatial position change of the weld, such as : The trajectory of the weld and the size of the weld, etc. Therefore, it is necessary to further improve it to accurately identify the weld information

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