Submerged-arc welding pipe internal burr removal device and method

Abstract

The invention relates to a submerged-arc welding pipe internal burr removal device and method, and belongs to the field of submerged-arc welding pipe production. The internal burr removal device comprises a computer, a machine fame, a left pair and a right pair of supporting rollers arranged on the machine frame and used for placing a pipe blank, a trolley which is placed in the pipe blank when internal burrs are removed and a burr excess weld metal detection device; and wheels are arranged at the bottom of the trolley, an image recognition device used for photographing morphology images of the internal burrs to be scraped is mounted at the top of the trolley, a scraping device used for scraping the internal burrs is mounted on the lower part of a vehicle body of the side surface of the trolley, and a temperature measuring device used for measuring temperature data of the internal burrs at a weld bead is mounted on the upper part of the vehicle body of the side surface. According to the submerged-arc welding pipe internal burr removal device and method, the scraping process of the internal burrs is automatically controlled based on a machine vision technology, through the linkage of the computer with the image recognition device, the temperature measuring device, the scraping device and the excess weld metal detection device, closed-loop control over the whole process of morphology detection of the internal burrs, tool positioning, temperature detection, scraping and internal burr excess weld metal detection is realized.

Description

technical field [0001] The invention relates to the field of submerged arc welded pipe production, in particular to a device and method for removing burrs in a submerged arc welded pipe. Background technique [0002] Spiral submerged arc welded pipe is made by rolling low-carbon carbon steel or low-alloy structural steel strip into a pipe blank at a certain helical angle, and then welding the pipe seam. Spiral submerged arc welded pipes are mainly used for oil and natural gas pipelines. With the development of large-scale oil and natural gas pipeline transportation technology, the bearing pressure of pipelines is increasing day by day, and the service conditions are increasingly harsh. The direction of the development of large-diameter thick-walled pipes. [0003] Spiral submerged arc welded pipe seams will produce internal burrs on the surface of the steel pipe after welding. During the process of oil transportation, the resistance coefficient of the weld bead to the oil i...

AI Technical Summary

Problems solved by technology

[0003] Spiral submerged arc welded pipe seams will produce internal burrs on the surface of the steel pipe after welding. During the process of oil transportation, the resistance coefficient of the weld bead to the oil is large and stress concentration is easy to occur, which occurs under the superposition of various complex stresses. Plastic deformation, resulting in damage and leakage of weld bead and pipe body

In actual production, it is difficult to effectively remove the internal burrs at the weld bead. Domestic pipe manufacturers generally use manual grinding. This method has low production efficiency, high labor intensity, and difficult to control the grinding quality. If you are not careful, the grinding wheel will be damaged. Injury to the pipe

Compared with the straight seam welded pipe, the spiral submerged arc welded pipe is difficult to position the scraper accurately due to the spiral shape of the weld bead, and it is prone to scraping and deep scraping, which greatly reduces the service life of the welded pipe

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