Inside and outside the circle of miniature bearing grinding parameters

In two rounds of the ends of the guide and delivery guide, with a population which is to ensure that the workpiece right into the grinding zone, the important thing, after the workpiece into grinding area, under the effect of high speed of the grinding wheel, the artifacts to close to the speed of the grinding wheel rotation, but by low speed spinning wheel brake and the influence of the friction plate, guide wheel speed is only 1/80 ~ 1/70 of grinding wheel speed, thus formed the workpiece grinding wheel. (2) in order to make the work smoothly through the grinding zone, and has certain longitudinal feed speed, wheel axis relative to the grinding wheel axis should be brought in the vertical direction in a tilt Angle, when the wheel after a tilt Angle, wheel speed v can be decomposed into hanging in the face of velocity in horizontal and v points speed v2. When idler pulley with rotation speed, can be decomposed into: V1 = v co = xsia, vertical points will make the workpiece rotation speed, horizontal velocity component ッ will push forward artifacts (3) in the centerless external cylindrical grinding process, placed between two wheel artifacts will be rounded in the process of automatic rotation and forward, depends on the height of the plate. Centerless external cylindrical grinding, grinding wheel and workpiece must be higher than the center of the center of the wheel. If the center of the workpiece center with grinding wheel contour, so when the workpiece convex point contact with the roller, the other side of the back to the point will be in contact with grinding wheel, it will cause the workpiece is always not rounded when workpieces when you point a bulge and roller contact, make the workpiece b is grinding to more and four. But point b, point a and center of the circle is not in a straight line, so when the point b to contact with the roller, a grinding wheel contact point has not yet been transferred to such a point and grinding wheel contact, workpieces and roller contact point is not that four pit. Convex point a it be ground down, when grinding, convex point being polished, pits also gradually becomes shallow, is gradually rounded artifacts, as shown in figure 5. 6 centerless external cylindrical grinding, must meet the following conditions: due to the carrier tilt a. Point of view, in order to guarantee smooth cutting, roller and workpiece must be kept in line contact, for roller surface should be trimmed into a hyperbolic shape of rotors. Carrier materials of friction coefficient of friction coefficient should be greater than grinding wheel material; The speed of the grinding wheel should be greater than the speed of the roller bearing plate tilt direction should help the workpiece against on the wheel. (3) in order to ensure the workpiece roundness, workpiece center should be higher than that of grinding wheel and the wheel attachment. Higher numerical ∥ associated with working with diameter d. When the workpiece diameter d = 8 ~ 30 mm, Hed / 3; When d = 30 ~ 70 mm, Hd4