Special Welding Machine Laser Welding Seam Tracking Sensor

Contact sensors
Contact sensors usually use probes to contact with the side wall of the workpiece or a side wall of the special welding machine laser welding seam tracking sensor in front of the welding gun. By detecting the offset of the probe, the control system can track the position of the weld seam. Its advantages are that it is not affected by arc interference and has low cost.
 

Ultrasonic sensors
Ultrasonic sensors detect the information and geometric shape of the weld seam by judging the time of the echo. It is not easily affected by electromagnetic, light, smoke and other interference during welding. However, it needs to be close to the workpiece, and is sensitive to noise, so it is easily affected by noise interference.
 

Arc sensor
Arc sensor calculates the shape information of the weld groove by utilizing the movement of the arc relative to the weld seam, and calculates the distance change between the welding gun and the workpiece through the parameter changes of arc voltage and current, so as to achieve the tracking control of the welding gun in the two directions of high and low and left and right. The arc special welding machine laser welding seam tracking sensor uses the arc itself as a sensor.
 

Laser vision sensor
Laser vision sensor is considered to be the most promising special welding machine laser welding seam tracking sensor. Based on the principle of triangulation, the laser projects the line-structure light onto the object to be detected through the lens group, which receives the diffuse reflection on the object and forms images on the CMOS/CCD sensor through the receiving lens group. These image data can be processed to generate information such as working distance, position and shape of the measured object. The control system analyzes and processes the monitoring data through special algorithms, and calculates and corrects the deviation of the welding robot/special machine welding trajectory to achieve weld seam tracking. 

With the equipment of special welding machine laser welding seam tracking sensor welding automation technology, it can improve the efficiency and quality of welding processing, reduce energy and material consumption, save production costs, lighten the labor intensity of workers, improve the working environment of welding and thus enhance the image of enterprises and make enterprises more competitive in the industry.

Industrial special welding machine laser welding seam tracking sensor welding robots usually adopt the working mode of "teaching and reproduction". In the process of robot welding, they can repeat the actions that have been taught with high precision in their workspace. The consistency of the base metal should be good in order to ensure the welding quality when the welding conditions are basically stable.

But in the actual special welding machine laser welding seam tracking sensor welding process, because the operator is not allowed or suitable to enter the working area of the robot in order to avoid danger during the operation of the industrial robot, the operator cannot monitor the welding process from a close distance in real time and cannot make necessary adjustment and control. Therefore, when the actual welding conditions change, such as the size error and position deviation of the workpiece in the process of processing and assembly during the welding process as well as the variation of the workpiece heating deformation and other factors, it will make the joint position deviates from the path of demonstration taught, which often leads to the decrease or even failure of welding quality. Accurate welding seam tracking is the key to ensure the welding quality, and it is an important factor to achieve welding automation.

Normally, in the robotic welding process, if a complex seam profile is to be welded, the operator has to teach the complex path to the robot.To teach a complex path to the robot, a lot of reference points need to be fed to the robot. By default, any robot system is programmed in such a way that when traveling from one reference point to another, the system chooses the optimum path. This optimum path may not accurately match with the seam profile, so, for more accuracy, more reference points should be fed. It is a very tedious process and does not ensure accuracy. Seam tracking technology eliminates all of this. With seam tracking technology, all we need to do is teach the starting and ending point of the seam to the robot and all the complex paths will be tracked by the system, there is no need for reference points in between. It saves a lot of time and makes the process significantly easier. Also, it increases the accuracy of the process.

Suzhou Full-v was founded in 2019 and has served thousands of users both domestically and internationally, gaining unanimous recognition from users. The Full-v 3D laser intelligent weld seam tracking system has achieved full coverage matching among mainstream robot manufacturers both domestically and internationally, and has the characteristics of simplicity, reliability, and widespread use. The company is committed to providing open and customized optoelectronic sensor equipment and technical services, always prioritizing product quality and user experience. With a spirit of continuous improvement as a craftsman, we provide customers with reliable and stable products.