A method for detecting the diameter tolerance of the two end surfaces of miniature tapered rollers

Abstract

The invention discloses a method of detecting diameter dimension tolerances of two end surfaces of a miniature tapered roller. According to the method, a set of detection device is used. The detection device comprises a base, a lifting frame, a photoelectric sensor, a horizontal frame, a servo motor, elastic holding forceps, a high-precision miniature camera, a display, and a computer. The two end surfaces of the detected miniature tapered roller are a large end surface and a small end surface. Image information of the small end surface or the large end surface of the detected miniature tapered roller is acquired respectively via the high-precision miniature camera; the image information is subjected to digital processing via the computer to be converted into a two-dimensional image and a corresponding diameter dimension tolerance; the diameter dimension tolerance is compared with a design dimension tolerance of the large end surface or a small end surface of a standard miniature tapered roller, whether the large end surface and the small end surface of the detected miniature tapered roller meet design requirements can be judged, the detection device has a simple and light structure, moving and carrying are facilitated, the detection speed is quick, the detection precision is high, and the detection precision of the miniature tapered roller is improved.

Description

technical field [0001] The invention belongs to the technical field of automatic detection of bearings, and in particular relates to a method for detecting the diameter tolerance of the two ends of a miniature tapered roller. Background technique [0002] The nominal diameters of the two end faces of the miniature tapered roller are not equal, so the two end faces of the miniature tapered roller can be called the large end face and the small end face respectively, and the design tolerances of the large end face and the small end face are also unequal Yes, the small end face of the miniature tapered roller usually bears a large axial load when it rotates, so it is necessary to check the machining accuracy of the small end face after grinding, and sometimes also check the large end face according to requirements. The machining accuracy is tested. [0003] There are three problems in detecting the dimensional tolerance of the small end face of miniature tapered rollers: [00...

AI Technical Summary

Problems solved by technology

[0005] Second, the miniature tapered roller is small in size, which brings a lot of inconvenience to detection when placed on a large workbench, and the detection accuracy is not high;

[0006] The third is that large measurement errors often occur when manual detection is adopted, and the detection efficiency is relatively low

[0007] Although the tool microscope can also detect the dimensional tolerance of the small end face, the mechanical structure of the tool microscope is complex and requires more manual intervention, so it is difficult to improve the detection efficiency

[0008] In summary, the existing detection methods have certain limitations, especially the dimensional tolerance detection of the small end face has always been a difficult problem in precision measurement

Images