Process for grinding tumbler bearing bore and its specified clamp apparatus

Abstract

The invention relates to a process and a special fixture for grinding the inner hole of a rotary arm bearing. First, the end face of the rotary arm bearing is processed and ground on a surface grinder, and secondly, the symmetrical double eccentric stopper of the rotary arm bearing is ground on an outer cylindrical grinder. Then, based on the circumscribed circle of the symmetrical double eccentric rib, the arm bearing is set in the special fixture of the cylindrical cavity with the inner and outer diameters concentric, and the special fixture is placed on the electromagnetic centerless fixture for grinding on the inner cylindrical grinding machine. To cut the bearing inner hole, the special fixture includes a clamp body, an end cover, and three screws connecting the clamp body and the end cover. A hole larger than the size of the bearing inner hole is opened on the bottom of the clamp body and the end cover. The invention improves the processing efficiency and It also has the characteristics of reliable process method and suitable for mass production.

Description

1. Technical field: [0001] The invention belongs to the technical field of mechanical processing technology, and in particular relates to a technology and a special fixture for grinding the inner hole of a rotating arm bearing. 2. Background technology: [0002] The arm bearing is an important part of the cycloid reducer. The bearing is a symmetrical double eccentric structure, and its inner hole becomes a key process in the grinding process because it is the installation and processing reference, and because of the structure of the arm bearing, this process becomes a difficult point in processing. At present, the grinding process of the inner hole of the arm bearing includes: on an internal grinding machine, use a three-jaw or four-jaw chuck to clamp the outer diameter of the arm bearing rib, and adjust an eccentricity for processing. Another processing method is, on the internal grinding machine, one end face of the pivot arm bearing leans against the end face of the jig,...

AI Technical Summary

Problems solved by technology

Both of the above two methods have the problem that the center of the inner hole of the workpiece needs to be aligned before processing, which is not only labor-intensive and time-consuming, but also the accuracy is difficult to guarantee, resulting in low efficiency of internal grinding and high scrap rate

Electromagnetic centerless fixture is a common processing method for grinding concentric parts such as discs in the machinery industry, but for structures such as arm bearings, it cannot be directly processed on electromagnetic centerless fixtures

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