Process for automatically measuring diameter of steel tube

Abstract

The invention relates to a method for automatically measuring the diameter of a steel pipe, which is characterized in that the method includes: installing a digital pulse generator, a counter and a calculating unit in the original electrical control device; installing an auxiliary measuring rod capable of moving and positioning along the length direction of idlers on one side of the steel pipe; installing a non-contact magnetic sensor on the auxiliary measuring rod; placing a ferromagnetic sensing head at any position at the circumference of the cutting position; sensing and generating two signals with no contact through rotating the ferromagnetic sensing head once and passing the ferromagnetic sensing head twice; accessing the signals to the counter in the electrical control device; calculating the steel pipe diameter of the cutting position based on the pulse count generated by the digital pulse generator and accumulated by the counter. The method has the advantages that errors caused by the difference between the nominal size and the actual size can be eliminate, and the method has reliable operation, easy maintenance and maintained accuracy.

Description

technical field [0001] The invention relates to a method for automatically measuring the diameter of a steel pipe, which is used for automatically measuring the actual diameter of a steel pipe and belongs to the technical field of measuring devices. Background technique [0002] The steel pipe is produced and supplied according to the nominal diameter and allowable tolerance of the corresponding product standard, so in fact the actual diameter of each steel pipe is the sum of the nominal (nominal) diameter and the allowable tolerance, which is not equal to the value of the nominal diameter. When automatic cutting machines such as flame or plasma are used to cut steel pipes to a fixed length, or when cutting steel pipes with intersecting lines, the actual diameter of the cutting place of the steel pipe must first be accurately measured. This is crucial to ensure the smooth progress of the operation and the quality of the cutting. [0003] Steel pipe intersecting line cutting...

AI Technical Summary

Problems solved by technology

[0005] Disadvantages of this type of equipment: Since it is impossible to automatically detect the size error of the steel pipe and correct the size error of the input control device, the phenomenon of continuous cutting of the pipe often occurs, which brings great trouble to the operation and cutting quality. The workpiece is large. This is especially the case with caliber tubing

In order to solve this problem, the factory requires the operator to re-measure the actual circumference of the steel pipe at the cutting place before cutting, and input this value into the control device to replace the nominal diameter size. Manual measurement operation is very inconvenient, and for large-diameter pipes, even two people are required Cooperate, time-consuming, and the measurement results are not easy to be accurate

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