Progressive feeding and precise straightening method for metal pipe

Abstract

A progressive feeding and precise straightening method for a metal pipe is disclosed. The method includes a step of achieving metal pipe feeding and straightening by straightening rollers arranged inpairs in an axial forward movement process of the metal pipe. The method is characterized in that a plurality of pairs of the straightening rollers arranged horizontally are adopted to achieve straightening in a manner that straightening force of each pair of the straightening rollers increases in order in the movement direction of the metal pipe. The method can achieve progressive straightening during feeding before metal pipe flaw detection so as to improve flaw detection effects and has advantages of simple implementation and good straightening effects.

Description

technical field [0001] The invention relates to a metal pipe flaw detection detection material feeding technology; in particular, it relates to a progressive feeding fine correction method for metal pipes. 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 c...

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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