Two-arm four-probe measurement device and method for measuring inner and outer diameters of end of steel tube

Abstract

The invention discloses a two-arm four-probe measurement device and method for measuring inner and outer diameters of an end of a steel tube. The measurement device comprises a rotary table (1), a rotary table fixing plane (2), two fixing arms (3) and (4), four laser ranging probes (a1), (a2), (b1) and (b2). According to the measurement method, the four probes rotate around the central axis M-M' of the rotary table, inner and outer diameters of two sections of the steel tube are measured at the same time, a virtual central axis and a virtual space vertical plane of the steel pipe are fitted, the measured section data of the steel tube is projected to the virtual space vertical plane so that the offset when the rotating central axis of the rotary table is not coincident with the central axis of the steel tube can be eliminated, the measurement accuracy is improved, the number of turns of the rotary table is reduced and the measurement speed is improved further. The device and the method can be used for realizing the rapid non-contact automated measurement of inner and outer diameters of the end of the steel tube, eliminating influences from subjective factors of a human and improving automation degree of the production process of steel tubes.

Description

technical field [0001] The invention belongs to the technical field of geometric quantity measurement, and in particular relates to a measuring device and a measuring method for the inner and outer diameter parameters of a steel pipe end section. Background technique [0002] With the continuous progress of on-site welding construction technology for pipelines and the continuous application of semi-automatic and fully automatic welding technologies, the requirements for the diameter of steel pipes are becoming more and more stringent, especially for the pipe ends. The requirements for the ovality of the pipe ends are also extremely strict. Its purpose is to make it possible to successfully complete the welding when the two pipes are welded in the field or in the ocean. Conversely, if the pipe end diameter and ellipticity of the steel pipe exceed the standard, it will cause difficulties in butt welding of the two pipes. Even if they can be barely butt welded together, a larg...

AI Technical Summary

Problems solved by technology

At present, when a pipe rolling factory in the steel pipe industry measures the inner and outer diameters of pipe ends, it mainly relies on manual measuring tools such as calipers and micrometers for detection, which is greatly affected by the production environment, the accuracy of measuring tools and the subjective factors of operators. At the same time, the measurement speed and measurement It is impossible for the number of data points to reach a high level

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