Muffle tube straightness measurement method based on three dimensional (3D) total station

Abstract

The invention discloses a muffle tube straightness measurement method based on a three dimensional (3D) total station comprises that (1) before rolled, a barrel body is divided into N equal divisions in the length direction of a panel veneer and divided into M equal divisions in the width direction as a first detection line; (2) the barrel bodies which are rolled are connected with each other in a butt joint mode or in a welded mode and N bisectrixes of the barrel bodies are in superposition as a second detection line. The 3D total station is in good measurement preparation. (3) Makers attached with reflector plates are placed on intersections of the first detection line and the N bisectrixes of barrel body circumference in order. Each control point is measured successively. The makers are stored in the 3D total station according to maker numbers. (4) A circle is fitted according to three-dimensional coordinates of each monitoring point. A theoretical central axis of the barrel body is imitated through circle centre coordinates of each circle. Deviations of an imitated axis and each monitoring point of the second detection line are calculated. The maximum which is a straightness error of the barrel body in a butt joint or in a welded mode is recorded. The muffle tube straightness measurement method based on the 3D total station is simple in operation, convenient to operate, and high in measurement accuracy.

Description

technical field [0001] The invention relates to a method for measuring the straightness of a muffle tube based on a 3D total station. Background technique [0002] The muffle tube is the key furnace equipment in the vertical stainless steel bright annealing furnace. It is made of multi-section cylindrical cylinders, and the total length is close to 30m. Because it has been working under the condition of high temperature and self-weight for a long time, in order to prevent it from bending prematurely Deformation, it is necessary to strictly ensure the straightness accuracy of the muffle tube body. [0003] In the muffle tube manufacturing process, according to the existing traditional process method, the straightness of a single-section cylinder can be measured by the method of hanging a vertical line, and the method of measuring the multi-section cylinder by drawing steel wires after splicing is cumbersome and inefficient Low, labor-intensive, and due to factors such as the...

AI Technical Summary

Problems solved by technology

[0003] In the muffle tube manufacturing process, according to the existing traditional process method, the straightness of a single-section cylinder can be measured by the method of hanging a vertical line, and the method of measuring the multi-section cylinder by drawing steel wires after splicing is cumbersome and inefficient Low, labor-intensive, and due to factors such as the length of the whole muffle tube, the error of measuring instruments such as steel wires, and manual rulers, the measurement results often have large deviations

Images