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Factory production requires a relatively high quality of the pipeline. Although welding of stainless steel is not as difficult as welding of aluminum, the specific properties of the material may cause many variables. The stainless steel tube must be smooth and free from oxidation. Because the thickness of stainless steel thin-walled pipes are all below 3mm, the improper sequence of assembly and welding, and the unreasonable selection of welding process parameters, can easily lead to welding deformation of the pipe plate, leading to lax sealing and the pipe being pulled off.
Reasons for the welding deformation of the tube plate: 1 Improper order of assembly and welding; 2 Inaccurate welding direction; 3 Unreasonable welding parameters, causing local overheating; 4 Failure to use appropriate auxiliary measures.
There are many non-destructive testing methods in the pipeline installation process. The actual inspection mainly uses visual inspection, ray inspection and penetration inspection, etc. The most widely used is visual inspection. There are many types of instruments for visual inspection, and industrial endoscopes are just one of them. Domestic introduction of industrial endoscope products from abroad began in the 1970s and 1980s. In recent years, domestic endoscope detection has entered a practical stage. Industrial endoscopes are increasingly used in the quality control of product production processes. And developed into a routine detection method.
The main function of the industrial endoscope is to inspect the interior of the pipeline that cannot be recognized by the human eye, instrument and equipment, etc. The main inspection is to check whether there are any cracks, white spots, blisters, pores, and inclusions on the surface of the pipeline and the weld seam. Before the inspection of the disc should eliminate the surface of the workpiece weld spatter, oxide skin, pits, paint and rust. Due to the complicated use environment of industrial pipeline endoscopes, the type of the endoscope is usually determined according to the specific location and requirements of the detection object. At least the factors such as the position, direction, minimum resolution requirement, access path, etc. of the detection must be considered. Many types of endoscopes are often required for use.
As a national high-tech enterprise, Shenzhen Yatai Optoelectronics Technology Co., Ltd. has won three technical invention patents in the endoscopic R&D: "endoscopic bending control structure" and "endoscope steering control mechanism". The "endoscope" and "endoscope fine-tuning device" were granted the invention patent granted by the State Intellectual Property Office. At this point, Yatai company received a total of 15 patents, including three endoscopic invention patents, four endoscopic utility models.
Application of Industrial Endoscope in Quality Inspection of Stainless Steel Welds
Before the factory begins to manufacture products, it is necessary to ensure that the plant and equipment are clean and clean to prevent unnecessary pollution. Therefore, the production of stainless steel materials, so the welding detection of these devices is very important. As the most widely used visual nondestructive testing tool at present, industrial electronic video endoscopy has been the main tool in industrial microscopic inspection. Through the video endoscope, the quality and color condition of the welded joints, as well as the residual deposits on the welded joints, can be observed. These unique video endoscopes have a smooth surface coating to prevent scratches on the surface of electropolished, clean tubing. In combination with an ultraviolet lighting system, the endoscopic inspection system can visually identify fine cracks in the weld.