Non-contact detection method for roundness of cylindrical roller

Abstract

The invention provides a non-contact detection method for roundness of a cylindrical roller. According to the non-contact detection method, a measurement environment is a dark room; when in measurement, the cylindrical roller is vertically placed in a fixture of a vertical machine tool for fixing; a projection plate is arranged on one side of the machine tool, a photosensitive element is arrangedinside the projection plate, and the photosensitive element is electrically connected with a computer; the cylindrical roller is irradiated by means of horizontal parallel light emitted from a surfacelight source on the other side of the machine tool, the parallel light passes through the cylindrical roller and is projected on the projection plate to form two boundaries of light and shade, and the photosensitive element converts an image of the projection plate into an electrical signal and transmits the electrical signal to the computer; the computer establishes a rectangular coordinate system on the generated image, and records abscissas of two measuring points on a specified ordinate on the projection boundary, and the measured difference between the two abscissas is the diameter; andthe cylindrical roller rotates for a cycle in a fixed-axis mode, and a roundness error of the cylindrical roller is calculated by adopting the least square circle method. The non-contact detection method can effectively avoid the measurement errors in a contact type measurement method and has higher measurement precision.

Description

technical field [0001] The invention relates to a cylindrical roller detection technology, in particular to a non-contact detection method for the roundness of a cylindrical roller. Background technique [0002] Bearings are important and key basic components in the equipment manufacturing industry, which directly determine the performance, quality and reliability of major equipment and host products, and are known as the "heart" components of equipment manufacturing. Precision cylindrical rollers are the key parts of bearings, and their roundness plays a vital role in the working performance and service life of bearings. [0003] At present, for the detection of the roundness of cylindrical rollers, the two-point method or the three-point method is used in most cases, and these methods are all contact detection methods. However, from a microscopic point of view, there are some unavoidable measurement errors in the contact detection method, including the irregularity of the...

AI Technical Summary

Problems solved by technology

However, from a microscopic point of view, there are some unavoidable measurement errors in the contact detection method, including the irregularity of the surface of the cylindrical roller (surface roughness and surface texture distribution); ) scratches the surface of the cylindrical roller, the measurer cannot accurately control the equal pressure of the touch point on the surface of the cylindrical roller during each measurement, and the deformation of the surface of the cylindrical roller due to the contact pressure, these uncontrollable factors will cause errors in the measurement results , affecting the accuracy of the measurement

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