A method to eliminate the cause of misjudgment in the straightness detection of welded rail joints on-line

Abstract

The invention discloses a method for excluding online-rail-welded-joint straightness-detection misjudgment inducements. The problem that misjudgments exist in existing online-rail-welded-joint straightness detection is solved. The method includes the steps that a, an electric straight ruler is verified to be eligible; b, a first oscillogram is lead in the free state of a rail-plant welded joint; c, a second oscillogram is lead in the free state of a rail base material on which a line is paved; d, the first oscillogram and the second oscillogram are averaged to form a third oscillogram; e, the rail joint and the base material which are fixed on the line are selected, and a fourth oscillogram is formed; f, a coordinate graph is drawn; g, detection is carried out, the result is ineligible when the detection value is larger than the corresponding numerical value of the fourth oscillogram, the result is eligible when the detection value is smaller than the corresponding numerical value of the third oscillogram, and when the detection value is between the third oscillogram and the fourth oscillogram, adjustment is carried out, and then whether the result is eligible or not is determined by detecting whether the detection numerical value reaches the standard or not. By means of the method, the problems that due to detection misjudgments of straightness, a welded seam is corrected, and even a rail is sawn to be re-welded are solved.

Description

technical field [0001] The invention relates to the detection of the welding quality of railway track rails, in particular to a method for eliminating the cause of misjudgment of the straightness detection of welded rail joints on the line. Background technique [0002] Most railways adopt the design of seamless lines. After new seamless lines or existing seamless lines are overhauled, the quality inspection of the flatness of welded joints will be carried out before operation. The accuracy of flatness inspection is directly related to the operation of trains. The safety and service life of the track structure. On-line (on-site) rail welded joint flatness detection generally uses an electronic straight ruler to process unqualified joints. The commonly used processing methods mainly include grinding, thermal straightening and saw rail rewelding. Welding will increase the number of line joints, and will consume a large amount of rail materials and labor, resulting in an incre...

AI Technical Summary

Problems solved by technology

[0005] In order to solve the problem of misjudgment caused by factors such as the line condition and the installation state of buckle fittings affecting the straightness detection accuracy of the existing on-line rail welded joint flatness detection, the present invention provides a method for eliminating the on-line welded rail joint flatness detection method. Straightness detection method of misjudgment inducement