Metal pipe helical line contact feeding straightening method

Abstract

The invention discloses a helical line contact feeding straightening method for a metal pipe, which includes the step of realizing the straightening of the metal pipe by means of paired straightening rollers when the metal pipe advances in the axial direction, and is characterized in that The circumferential surface of the straightening rollers is set in a concave arc shape, so that each of the straightening rollers forms two symmetrical helical contact with the surface of the metal pipe to achieve straightening. The invention can realize the straightening of the metal pipe during flaw detection and improve the flaw detection effect, and has the advantages of simple implementation and good straightening effect.

Description

technical field [0001] The invention relates to a metal pipe flaw detection detection feeding technology, in particular to a metal pipe helical line contact feeding straightening method. Background technique [0002] Metal pipe (mainly refers to steel pipe) is an important building material widely used. Due to various factors in the production process of metal pipe, defects such as longitudinal cracks, transverse cracks, folding, and delamination often exist on the metal pipe wall. If the metal pipe is defective, it will break during use and cause accidents, or even cause serious consequences, which may cause major economic losses or even casualties. For this reason, metal pipes for important purposes need to have complete non-destructive testing equipment, and online flaw detection of metal pipes . In order to ensure the quality of the metal pipes leaving the factory, the existing flaw detection methods mainly include ultrasonic flaw detection and eddy current flaw detecti...

AI Technical Summary

Problems solved by technology

In the actual automatic flaw detection process, because the metal pipe is in the transmission process of detection, the probe of the existing ultrasonic automatic flaw detection device is usually directly fixed on the probe bracket, and the probe bracket is fixedly connected with the flaw detection water tank, because the type of metal pipe is relatively small. Many, fixed probe settings, unable to meet the flaw detection requirements of various types of metal pipes

At the same time, during the flaw detection process of the metal pipe, when the defect position of the metal pipe passes through, it is easy to touch the probe and cause the probe to vibrate and warp, resulting in a change in the amplitude of the defect signal. If it cannot be adjusted in time, it will also affect the reliability of flaw detection. and accuracy

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