Bearing friction when machining precision design skills

Bearing the superfinishing order of general can be divided into three steps: cutting, cutting, finishing finishing. A: bearing surface of the stone cutting and rough on the surface of the raceway convex peak in contact, because contact area is smaller, the force per unit area is larger, under certain 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 abrasive 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. B: bearing half cutting to continue with the processing, bearing the workpiece 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. C: the light phase is this bearing super finishing the last step. As workpiece surface is smooth, millstone and further increase the contact area on the surface of the workpiece, and the stone and is gradually lubricating oil film bearing surface segregation, the pressure on unit area is small, the cutting effect is reduced, the last stop cutting automatically. In 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 together, so as to realize in the condition of rotating relative to the static load and limited movement system the basic task of the system location. In the shaft and bearing seat, bearing requirements in the radial, axial and tangential direction to three directions such as fixed position. Through the positioning of the radial and tangential the tight fit of bearing ring, the axial positioning only in a few cases with tight fit; Generally USES the axial spacing parts, such as end cover and retainer could happen on the axial location clearance range. Bearing diameter of axle and bearing shell direct contact to prevent adhesion formation and the performance of the boundary lubrication. Factors influencing the friction pair friction compatibility of materials is: ( 1) As a deputy to the difficulty of the composition of alloy materials metallurgy. ( 2) Materials and affinity of lubricant. ( 3) Become vice material in the absence of the friction factor of lubrication condition. ( 4) The microstructure of materials. ( 5) Thermal conductivity of materials. ( 6) The size of the material surface energy and the characteristics of the oxide film. With oil pump to pass through the nozzle shot into the bearing, high pressure oil into the bearing of the bearing at the other end into the oil in the tank. When bearing at high speed, rolling element and cage with high rotate speed makes the surrounding air, the air in general it is difficult to be sent to the bearing lubricating oil lubrication method, then must use the method of high-pressure jet spray the lubricating oil to the bearings, the position of the nozzle should be placed between inner ring and retainer center.