Nov 15, 2021

Laser welding industry solutions--laser seam tracking

1. Brief introduction of laser welding process

The laser welding process is a modern welding method. Compared with traditional welding methods, laser welding has many characteristics, such as small deformation of the workpiece being welded, high welding depth and width, and small heat-affected area. In addition, the laser welding process will not be affected by the magnetic field, will not be completely limited to the working environment of conductive materials and vacuum, and will not generate a large amount of X-rays during the work. It is precisely because of the above advantages that the laser welding process has a very important position in the automobile manufacturing industry, the welding of aluminum and magnesium alloy materials, the plastic processing industry, the shipbuilding industry and other fields. It is a highly comprehensive technology that can Significantly improve industrial efficiency and product and service quality.

2. Current status and welding problems

Each industry has its limitations, and so does the laser welding industry. According to the data collected and analyzed in the laser welding industry, the industry uses thin materials, high sealing requirements, narrow weld bead, and manual labor. Manual welding basically cannot meet the welding requirements of the workpiece, and mainly depends on the welding of automatic welding equipment; however, in the process of automatic production, due to the workpiece blanking and assembly, tooling, etc., there is a deviation in the consistency of the welding seam position and the efficiency of manual point-to-point Therefore, the customer hopes to have a set of equipment to realize the real-time correction of the welding process, guide the welding torch to weld, improve work efficiency, and reduce the scrap rate of products.

For example: 【Rice cooker and kettle】

The pot materials are mostly aluminum alloy liner, stainless steel liner, ceramic liner and multi-layer alloy liner. The bottom of the pot is divided into bottom pot and double bottom pot in terms of production process. Glue together, the double bottom pot is mainly welded at high temperature, and other types such as kettles are mainly made of sheet metal joint, and then welded to weld the bottom surface together. The double bottom liner of the electric rice cooker used in the induction cooker generally combines the workpiece base and the liner, and then performs welding. The type of weld is mostly lap joints. Due to material thickness problems, the height of the lap welds is generally below 0.8mm ; Electric kettles are formed by splicing the bottom surface and the body of the kettle. When welding, the internal circumferential welds are mainly welded, generally fillet welds. Because the bottom process is different, there may be other features on the basis of the fillet welds. . High-standard welding requirements pose a difficult challenge to both manual and automated production equipment.

3. The solution after cooperating with laser seam tracking

The commonly used laser vision weld tracker has problems such as large installation interference and low detection accuracy, and cannot be applied to imposition welding. However, the coaxial vision series products of Chuangxiang Intelligent Control can effectively solve these problems and are widely used in Laser welding industry.

Working principle

The image data of the weld seam is collected by the CCD camera, and the video cable transmits the image data to the computing controller, and the on-line real-time detection of the weld seam is realized through the complex program algorithm in the processor in the computing controller. 

System composition 

Name  Specification
Visual control cabinet   
CCD camera  with lens
Cable  3m network cable
485 communication cable
3-core power cord
BNC video cable

Main parameters

Name Coaxial Vision System
Power AC220V
Detection accuracy 0.01mm
Communication interface  Fast Ethernet/RS485
Sampling frequency 25HZ
Working temperature ~10~65 (no freezing)
Support parameters  64(customizable)
Support protocol  MODBUS TCP/RTU, KUKA robot communication protocol, Chuangxiang intelligent control protocol, etc.

Free Plan



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