Bearing friction superfinishing steps skills explanation

Precision bearing in accordance with ISO standards are divided into: P0, P5, P6, P4, P2. In turn increased, which is suitable for ordinary P0 accuracy, other is precise. Of course, different standards, different types of bearings, their methods are different, but the meaning is to. The precision of the rolling bearing points ( The main) Dimensional accuracy and rotation accuracy. Precision has been standardized, such as: 0, 6 x, 6, 5, 4, 2, 6, etc. , of course, in addition to the above two kinds of bearings and other kinds of bearings, such as spindle bearings, wheel bearings are divided with precision, after all, the use of the bearing is very extensive, but, every application domain for bearing accuracy requirement is very high, so as to some meet, used to decide the use of the fruit, so, in the machining accuracy of bearing, for precision machining of the friction also have corresponding sequence design and methods, a case, the bearing of superfinishing sequence can be divided into three steps: cutting, cutting, finishing finishing. Today, the author would like to give you details about the steps and skills about bearing superfinishing friction. 1, cutting stone surface and roughness on the surface of the raceway convex peak in contact, because contact area is smaller, the force per unit area is larger, under the effect of constant pressure, the stone first 'cutting' effect by bearing the workpiece, the part on the surface of the stone grinding grain fall off and broken, show some new sharp grinding grain and the edge. Peak at the same time, the convex surface of the bearing parts are fast cutting, cutting and cutting through the role of the convex peak and remove bearing the workpiece surface grinding metamorphic layer. This phase is called cutting stage, at this stage to remove most of the metal allowance. 2 and a half to continue with the processing, cutting the bearing surface gradually be ground flat. At this point, the millstone and the surface contact area increases, the pressure on unit area is reduced, cutting depth, cutting ability. At the same time, the stone surface pores blocked, millstone is cutting state. This phase is called bearing finishing half cutting stage, bearing the workpiece surface cutting in half cutting phase trace becomes shallow, and a dark gloss. 3, the finishing stage is this bearing after superfinishing of step. As workpiece surface is smooth, millstone increase contact with the surface area of progress, and the stone and is gradually lubricating oil film bearing surface segregation, the pressure on unit area is small, the cutting, automatic stop when cutting. This stage we call finishing stage. Surface finishing stage no cutting marks, bearing present a light product luster. Role is to make the bearing fits of stationary ring and rotating ring, respectively, and installation of bearing parts of the stationary part ( Usually bearing) And rotating parts ( Usually the shaft, Consolidation in up to achieve in the condition of rotating relative to the static load and limited movement system the basic task of the system location. Above introduction is about bearing superfinishing basic steps, each step are indispensable, only in this way step by step, can be produced in line with the requirements of bearing, to make the production out of the bearing can be reached the standard of application, so as to play their own value. More knowledge about bearing can access: used for machine tool spindle of a few large ultra-precision angular contact ball bearing precision bearing in high speed precision spindle design how to apply? Tags: bearing superfinishing