An arc surface center measuring instrument and center measuring method

Abstract

The invention relates to an arc surface center measuring instrument and a center measuring method. At present, there is no measuring instrument that can quickly obtain the center position of the arc surface. The arc surface center measuring instrument of the present invention is characterized in that it includes a direction indicator plate, two legs of equal length, a marking pen, and a central shaft sleeve for fitting the marking pen, and is used to clamp the two legs to keep the two legs. Elastic clips with legs tangent to the measured arc surface at the same time, central shaft card slot, locking bolts for axial positioning of the marker pen set in the central shaft sleeve, and for connecting the direction indicator wheel, The connecting bolts of the two legs, the slot of the central axis and the central axis sleeve. The center measurement method of the present invention is characterized in that: the two legs are simultaneously tangent to the arc surface of the measured tube, and the marking pen is inclined to one side of the arc surface center measuring instrument for marking, and the arc in this direction can be found. The center point of the face. The method of measuring the center line and center point of the arc surface of the present invention is flexible, simple and efficient.

Description

technical field [0001] The invention relates to a measuring device and a measuring method, in particular to an arc surface center measuring instrument and a center measuring method, which are specially used for measuring and marking the center line or a certain circle on a horizontal cylindrical surface or a cylindrical surface with a certain inclination. Section center point. Background technique [0002] In pipeline engineering, it is often necessary to find out the centerline and center point of various cylindrical objects (such as pipes and round steel) in order to obtain the measurement position or processing position. For example, measuring the hardness of the center point of the back arc of the elbow, measuring the height of the center point of the installation pipeline, etc. At present, there is only a device for measuring the radius or diameter of an arc, such as a Chinese patent whose publication date is June 17, 2015, and the publication number is CN204404971U, w...

AI Technical Summary

Problems solved by technology

In actual engineering, rulers, squares or combined measurements are mostly used to roughly find out the center line and center point. It is not easy to carry, and the replacement is cumbersome and error-prone, and it is not accurate enough.

[0003] At present, there is no one that can be widely used in the processing and manufacturing of various cylindrical objects, especially in pipeline engineering, for marking and measuring the center point and center line of the surface of pipes, round steel, pipe fittings, etc., so as to quickly obtain the measurement position or processing position. measuring instrument

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