Dedicated machine tool for compound grinding of shaft washer raceway and flange of thrust aligning roller bearing

Abstract

The invention discloses a dedicated machine tool for compound grinding of a shaft washer raceway and a flange of a thrust aligning roller bearing, which is used for realizing integrated processing for a flange and a raceway and ensuring the processing precision. The technical scheme is characterized in that a headstock slideway is arranged on the surface of the machine tool, a headstock is arranged on the headstock slideway and can slide front and back; an electromagnetic centreless fixture is fixed on a headstock output shaft, workpieces are clamped on the electromagnetic centreless fixture, a grinding wheel axle box is fixed on a backing plate, the backing plate is arranged on a backing plate slideway and can slide left and right; a grinding wheel is fixed on the headstock output shaft, and the contour line of the working face of the grinding wheel consists of straight lines and curves; and the axial line of each workpiece is perpendicular to the axial line of the grinding wheel. The machine tool has the following advantages of vertical grinding, unidirectional feeding and high precision, not only is suitable for the single-face grinding, but also is suitable for compound grinding of two spherical faces of the shaft washer raceway and the flange, and meets the requirements on shape precision and position precision simultaneously. By compound grinding, the machine tool reduces one procedure, has multiple purposes, and increases the efficiency.

Description

technical field [0001] The invention relates to grinding processing equipment, in particular to a special machine tool for compound grinding of raceways and ribs of shaft rings of thrust self-aligning roller bearings. Background technique [0002] Thrust spherical roller bearings are widely used in various mechanical equipment as axial load support, but they often fail early in operation without reaching the service life cycle. At present, there is no special grinding machine for grinding the rib 2 and the raceway 3 of the shaft ring 1, and the radius of curvature of the spherical surface of the rib 2 is r 1 , the radius of curvature of the spherical surface of raceway 3 is r 2 It should coincide with the roller 4-ball base surface (see figure 1 ), each manufacturer can only process on substitute grinding machines; such as figure 2 , image 3 As shown, the internal grinding machine is mostly used for cross-grinding the rib 2 and the raceway 3, and the intersection angle...

AI Technical Summary

Problems solved by technology

[0002] Thrust spherical roller bearings are widely used in various mechanical equipment as an axial load support, but they often fail to reach the service life cycle during operation

At present, there is no special grinding machine for grinding the rib 2 and the raceway 3 of the shaft ring 1, and the radius of curvature of the spherical surface of the rib 2 is r 1 , the radius of curvature of the spherical surface of raceway 3 is r 2 Should coincide with the roller 4-ball base surface (see figure 1 ), each manufacturer can only process on substitute grinding machines; such as figure 2 , image 3 As shown, the internal grinding machine is mostly used for cross-grinding the rib 2 and the raceway 3, and the intersection angle between the axis 5 of the workpiece and the axis 6 of the grinding wheel is less than 90° during processing, and manual compound feeding is required in two directions: front and rear, left and right; use The internal grinding head grinding wheel 11 has a small diameter, a low grinding line speed, and poor grinding surface accuracy; since the two spherical surfaces of the shaft ring 1 are processed separately in two processes, it is difficult to ensure the relative position accuracy of the two spherical surfaces

For the reasons mentioned above, it is difficult to guarantee the mutual position accuracy of the rib 2 and the raceway 3. In fact, the roller 4, the rib 2, and the raceway 3 cannot cooperate organically and interfere with each other. During the forced operation, the ball of the roller 4 Severe sliding friction and sliding cracks occur between the base surface and the rib 2, and cause the shaft ring 1 and roller 4 to break, causing the bearing to fail early; at the same time, the grinding efficiency is low

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