?? Shandong shunxinda Machinery Co., Ltd. (13969559358) is located in Liaocheng Economic Development Zone, Jiangbei water city with beautiful scenery. It is a company specializing in the production, processing and sales of precision seamless pipe, cold drawn precision seamless pipe and cold-rolled precision seamless pipe
Large precision seamless pipe price weld; Automatic detection; Image detection; Ultrasonic testing
The price design and development of large-scale precision seamless pipe has gradually become a research hotspot. In the process construction of large-scale precision seamless pipe price, large-scale precision seamless pipe price weld; Automatic detection; Image detection; With the increasing demand of large-scale steel structure buildings in China, ultrasonic testing is becoming more and more important. The quality of welding seam has an important influence on engineering quality. The traditional observation method can not meet the demand of large-scale precision seamless pipe welding seam. This paper studies and analyzes the automatic detection method of welding seam, mainly introduces the X-ray image detection and ultrasonic detection method used at this stage, and introduces the application characteristics of the two methods respectively. Large precision seamless pipe price weld; Automatic detection; Image detection; With the increasing scale of large-scale steel structure buildings in our country, the welded structure presents the development trend of large-scale and thick wall. In addition to being affected by various complex natural environment (temperature, humidity, hydrology, etc.), the welded structure is easy to be damaged by the increasing traffic flow and dynamic load, Therefore, the safety and reliability of the structure is particularly important. If these problems are not studied and evaluated, the structure will not be repaired and reinforced in time, which will not only affect the traffic safety, shorten the service life of steel structure, but also cause sudden damage or collapse. The price of precision seamless pipe of large-scale steel structure is formed by hot rolling and curling. During the welding process of precision seamless pipe, the welding seam needs to be strictly inspected. The traditional weld inspection is based on visual inspection, which is greatly affected by the subjective factors of inspectors, which can not guarantee the qualified rate of inspection. In order to improve the qualification rate and efficiency of inspection, the automatic detection method is used to inspect the price weld of large-scale precision seamless pipe  at present, the main methods of detecting weld are X-ray image automatic detection and ultrasonic automatic detection. Now the two methods are discussed respectively.
Welding requirements and common defect types modern steel structure is mainly made of precision seamless pipe price combination welding, after welding, there are many methods for weld detection. Moreover, for the suspension bridge steel box girder bridge location and transmission line steel pipe composite tower, the relevant welding construction quality and precision requirements are high, and the difficulty is big, and the influence on the welding quality is also great, so as to ensure the welding accuracy and weld appearance and internal quality of steel structure 20Cr precision steel pipe. There are five kinds of weld defects which seriously affect the mechanical properties of the crane, such as crack, poor forming, porosity, inclusion and poor fusion. The formation mechanism of defects and their influence on weld strength are different. The defect characteristics produced by inspection are also different. The X-ray image detection technology for weld seam is one of the image detection technologies. In the detection, the weld is nondestructive detected by X-ray  with the continuous development of hardware and software, X-ray detection can automatically identify the weld, and the fine and dynamic inspection can clearly understand the structure of the weld, Detect the defects of weld. 3.1 X-ray flaw detection image detection system consists of two parts: 1. Conversion part, including welding seam, reflector, CCD camera and X-ray source; and (2) processing part, including monitor and computer system. The working process of X-ray flaw detection image detection is that X-ray is emitted from the light source in the conversion part, and then transformed into visible light through the welding seam of precision seamless pipe, and reflected to the CCD camera, and sent to the processing part for optical signal recognition at the same time. In the processing part, the optical signal is converted into electrical signal, and the image of weld is displayed on the monitor after the electrical signal is captured and encoded. The structure and shape of the weld can be seen directly on the monitor. As shown in Figure 1, the welding seam can be automatically identified in the monitor system. If there are pores and other defects in the weld, bright lines or bright spots will be formed in the weld image of the monitor. After testing the weld, it can store the crazy test results, so as to facilitate the inspection and subsequent research and application. 3.2 X-ray flaw detection image detection principle in X-ray flaw detection image detection, image processing mode is one of the factors affecting the detection results. Although with the development of computer technology, image detection technology has undergone significant changes, but still need to take appropriate detection methods to get fine dynamic detection results. In image detection, how to remove the background is an important aspect. Image segmentation method and edge detection method can be used in detection, but these two methods have higher accuracy when the contrast between weld and background is strong, and they are easily affected by noise. The similarity detection algorithm based on template matching can be used in X-ray flaw detection image detection. In this method, the template similarity processing can achieve high accuracy, but it can not meet the needs of real-time monitoring. Using X-ray image detection technology, and based on fuzzy logic operation, can effectively contrast and analyze the weld, background and defect, and fuzzy logic operation can meet the needs of dynamic monitoring. In the process of weld inspection and extraction, the selection of fuzzy logic algorithm can effectively carry out dynamic detection of weld, and can meet the detection accuracy of weld. The image technology of X-ray flaw detection based on fuzzy logic algorithm can not only meet the needs of dynamic detection, but also meet the accuracy of weld detection, and has a good application prospect. 3.3 the advantage analysis of X-ray flaw detection image detection adopts X-ray flaw detection image detection method based on fuzzy logic algorithm. Compared with other image detection methods, dynamic superposition is used to eliminate the background noise, which can detect the weld seam more accurately. And in the process of detection, dynamic detection is adopted, which has the adaptability of calling ha, and can effectively improve the detection speed. Taking X-ray as the light source system can ensure the contrast between the welding seam and the background, and this light source has adaptability and can meet the needs of rapid detection.
?? The company reserves a variety of specifications of precision seamless pipe, cold drawn precision seamless pipe, cold-rolled precision seamless pipe, perennial business in Tianjin, Baotou Steel, Baosteel, Hengyang, Angang, Chengdu, Yegang, Lubao, Anyang, Jiangyin, Hongdu and other high-quality seamless steel pipe, alloy steel pipe, high-pressure boiler pipe, alloy high-pressure seamless pipe, thick wall seamless pipe, fluid pipe, structural pipe, chemical fertilizer special pipe, Petroleum cracking pipe, low pressure boiler pipe, large diameter seamless pipe, large diameter welded pipe, precision steel pipe, etc. The materials of common resources are: 10 ¡Á 10, 20 ¡Á 10, 45 ¡Á 10, 16Mn, 27SiMn, 12Cr1MoV, 15CrMo, 12Cr1MoVG, 15CrMoG, 10CrMo910, 20Cr, 40Cr, 35CrMo, 304, 316, 316L, 310S, 309S, etc.