Introduction: Laser welding is a flexible processing method. It is widely used in modern processing. This project is laser welding of small 3C metal workpieces. The workpieces are usually small and the welding track accuracy is relatively high. The existing operation method is still based on manual installation. Clips are mainly produced and processed in the manner of human eyes. In addition to the cumbersome alignment process, production efficiency is low. In addition, due to factors such as visual fatigue caused by artificial work for a long time, the consistency and stability of welding quality cannot be effectively guaranteed. Therefore, this project uses Shenzhen Vision Dragon's VD100 visual positioning technology to provide positioning parameters for the movement of laser welding equipment and achieve high-precision laser welding.
The introduction of machine vision replaces the manual identification of the workpiece and alignment work, and the use of automated clamping mechanism to achieve full automation of the workpiece laser welding. Can greatly increase production efficiency and welding quality stability.
The main functions of machine vision in this process are: automatic identification of workpiece incoming materials, different welding area of ​​different workpieces, and automatic and accurate searching and positioning of the preset welding area for each workpiece. After accurately positioning the welding area automatically, the welding position coordinates can be output in real time through data communication to guide the laser to accurately weld the preset trajectory.
In advanced welding applications, it is also possible to upgrade the software, and re-inspect the size, position, and appearance of the welding marks after the welding is completed. The real-time monitoring of welding quality in the production process is realized, and the production yield is greatly increased.
Visual Dragon VD100 visual positioning system works
Vision Dragon VD100 visual positioning system consists of three parts: vision system, laser welding system and moving mechanism. It establishes contact through the calibration of vision system. The calibration is divided into two parts. First, the vision system and the laser welding system use a high-precision nine-point calibration algorithm to unify the vision system coordinate system and the laser welding coordinate system. Another part of the calibration is the coordinate system calibration between the welding head of the vision system and the movement mechanism.
In the actual welding production, the position and angle of the welding are firstly calculated, the offset is sent to the movement mechanism, the movement mechanism uses the position offset to adjust the position of the welding head, and the laser welding system uses the position and angle offset to adjust the welding pattern. To weld the exact location.
In the positioning calculation process, the geometric contour matching positioning algorithm is used, and the positioning accuracy is 1/40 sub-pixels, which is not affected by uneven light. In addition, the combination of finding the line to find points to facilitate the accurate positioning of various features.
In this application process, machine vision not only drastically reduces the labor cost of production, but also increases the efficiency and yield of production.
Source: Shenzhen Vision Dragon Technology Co., Ltd.
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