Sphere clearance measurement method

Abstract

The invention relates to a measuring method for spherical surface clearance, which belongs to the measuring technical field. Firstly, two great circles which are mutually vertical are optionally intercepted by the centre of sphere on the inside spherical surface of two measured spherical surface; four measuring points are respective uniformly distributed along the circumference of the two great circles; a rectangular coordinate system is established by taking the center of sphere of the inside spherical surface of the two measured spherical surface as a base point; a spherical coordinate system is established based on the rectangular coordinate system; the two measured spherical radiuses and the corresponding distance between every measuring point and the outside spherical surface of the two measured spherical surface are respectively obtained; the center of sphere coordinates of the outside spherical surface of the two measured spherical surface are obtained by calculating according to the distance of a polyline, thus figuring out the distance between any point M of the inside spherical surface of the two measured spherical surface and the outside spherical surface. The measuring method is accurate, fast, effectively deals with the measuring data of the spherical surface clearance, can be used for measuring the distance between the spherical surfaces with 0-2mm clearance. The measuring resolution factor is 0.001mm and the measuring precision is minus or plus 0.02mm.

Description

technical field [0001] The invention relates to a method for measuring spherical gaps, belonging to the technical field of measurement. Background technique [0002] With the development of science and technology and production, the shapes of key parts of some major equipment are becoming more and more complex, and the requirements for processing and assembly positioning accuracy are getting higher and higher, and the requirements for measurement are also higher. Parts with thin-walled surfaces of revolution are widely used in national defense and various daily life products, and the processing, measurement and monitoring of these parts are often limited by special conditions such as the size of the space structure and the medium of the material to be measured. Increased difficulty. The ball is a key precision part in various high-tech equipment such as machinery manufacturing, precision instruments, and aerospace equipment. The study of evaluation theory and testing techno...

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Problems solved by technology

[0007] Since the principle of the eddy current sensor applied to the detection of cracks and other defects is very different from the principle applied to displacement measurement, the form and arrangement of the sensors in the above eddy current defect detection system provide an idea for the measurement of the spherical interlayer gap, but The sensor array and its detection method are not suitable for the measurement of spherical gap

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