A device for batch superfinishing of bearing inner ring raceway

Abstract

A device for batch superfinishing of bearing inner ring raceway, comprising a rack with two rollers, a plurality of bearing inner rings are divided into a plurality of groups of clamps by a plurality of bearing positioning assemblies, a plurality of oilstone clamping shafts are arranged on the rack, and a plurality of oilstones are respectively connected to the oilstone clamping shafts, so that the plurality of oilstones can process the raceways of the plurality of groups of bearing inner rings when the two rollers drive all the bearing inner rings to rotate synchronously; the bearing positioning assembly comprises a spiral spring, two side plates, two retaining rings and two clamping plates, the plurality of bearing inner rings in the same group are sleeved on the spiral spring, the two side plates and the two retaining rings are sleeved on the spiral spring, the retaining ring is pressed on the end face of the bearing inner ring, and the two clamping plates are penetrated in the spiral structure of the spiral spring, so that the two clamping plates are pressed on the two side plates by the elastic force of the spiral spring, thereby clamping the plurality of bearing inner rings in the same group in the axial direction; one end of the spiral spring in the axial direction is provided with a pull hook for manually stretching the spiral spring.

Description

TECHNICAL FIELD

[0001] The present application relates to the field of bearing inner ring raceway processing device, especially to a device for batch superfinishing of bearing inner ring raceway. BACKGROUND

[0002] The bearing inner ring raceway is usually processed by multi-head raceway superfinishing equipment, which provides radial support for the bearing inner ring through two rollers, and then acts on the raceway of the bearing inner ring through the oil stone installed on the oil stone clamp shaft. Under the drive of the motor, the oil stone oscillates at a certain frequency to achieve the purpose of raceway superfinishing. However, for large-diameter narrow-width bearing parts, due to the large outer diameter size but narrow width size in the axial direction, the shape and position tolerances such as raceway side swing and roundness after superfinishing often exceed the tolerance, and the processing efficiency is low, which cannot meet the batch processing demand. SUMMARY

[0003] The purpose of the present application is to provide a device for batch superfinishing of bearing inner ring raceway, which improves the processing precision and meets the batch processing demand.

[0004] The technical scheme adopted by the present application to solve the above technical problems is: a device for batch superfinishing of bearing inner ring raceway, comprising a rack provided with two rollers, a plurality of bearing inner rings can be placed on the two rollers and tangent to the two rollers at the same time, the plurality of bearing inner rings are divided into a plurality of groups of clamps by a plurality of bearing positioning assemblies, a plurality of oil stone clamp shafts are provided on the rack, the plurality of oil stone clamp shafts are respectively connected with oil stones, the bottom end of the oil stone can contact the top side raceway of a group of bearing inner rings clamped by the same bearing positioning assembly, so that the plurality of oil stones can process the raceways of the plurality of groups of bearing inner rings when the two rollers drive all the bearing inner rings to rotate synchronously.

[0005] The bearing positioning assembly comprises a coil spring, two side plates, two retaining rings and two clamping plates, the inner rings of the bearings in the same group are sleeved on the coil spring, and the end faces of the inner rings are sequentially abutted to form a cylindrical structure, the two side plates and the two retaining rings are sleeved on the coil spring, the two side plates are respectively located at the two sides of the cylindrical structure in the axial direction, the retaining rings are located between the side plates and the cylindrical structure, one end of the retaining ring in the axial direction is installed on the side plate, and the other end of the retaining ring in the axial direction is pressed on the end face of the inner ring of the bearing located at the end position of the cylindrical structure; the two clamping plates are arranged in the spiral structure of the coil spring, the two sides of the clamping plate are clamped by the adjacent two annular structures in the spiral structure of the coil spring, and the two clamping plates are respectively pressed on the sides of the two side plates away from the retaining ring by the elastic force of the coil spring, so that the inner rings of the bearings in the same group are clamped in the axial direction; one end of the coil spring in the axial direction is provided with a pull hook, so that the coil spring can be manually stretched to enable the clamping plate to be separated from the spiral structure of the coil spring.

[0006] Preferably, the two roller shafts include a driving roller and a driven roller, and the rack is provided with a position adjusting device capable of adjusting the installation height of the two roller shafts and the radial distance between the two roller shafts.

[0007] Preferably, the clamping plate on the side close to the pull hook is provided with a hand holding ear portion extending from the side plate in the axial direction of the coil spring.

[0008] According to the above technical scheme, the present application has the following advantages:

[0009] The present application clamps the inner rings of the bearings in multiple groups through multiple bearing positioning assemblies, and only needs to insert the spring, stretch the spring and install the clamping plate during operation, which is simple and convenient, but can ensure the axial positioning effect of the inner rings of the bearings in the same group. The number of the inner rings of the bearings in the same group is determined according to whether the inner rings of the bearings can move in the radial direction after being manually pushed and pressed by the operator, so as to ensure that the axial force between the inner rings of the bearings is within a proper range, and the inner rings of the bearings in the same group can move freely under the radial pressure of the oil stone. Even if there is a radial deviation during clamping of the inner rings of the bearings, the inner rings of the bearings can still maintain sufficient tangential contact with the roller shaft during the machining process, so as to ensure the shape and position tolerances such as side swing and roundness of the raceway after superfinishing. The structure is simple, the machining effect is stable, multiple groups of inner rings of bearings can be machined at one time, and the present application is particularly suitable for raceway superfinishing of small-batch large-diameter narrow-end-face bearings, and can meet the demand of batch machining. BRIEF DESCRIPTION OF DRAWINGS

[0010] Figure 1 It is a schematic view along the axial direction of the roller shaft;

[0011] Figure 2 It is a top view of the bearing positioning assembly placed on the two roller shafts, and the oil stone is omitted in the figure;

[0012] Figure 3 Schematic view of the bearing positioning assembly.

[0013] In the figure, 1 is a rack, 2 is a roller shaft, 3 is a bearing inner ring, 4 is an oil stone holder shaft, 5 is an oil stone, 6 is a clamping plate, 7 is a side plate, 8 is a retaining ring, 9 is a coil spring, and 10 is a pull hook. DETAILED DESCRIPTION

[0014] With reference to the drawings, the detailed description is as follows:

[0015] As shown in Figure 1 , 2 , a device for mass superfinishing of the raceway of a bearing inner ring 3 comprises a rack 1 on which two roller shafts 2 are mounted, the two roller shafts 2 comprising a driving roller and a driven roller, the rack 1 being provided with a position adjusting device capable of adjusting the installation height of the two roller shafts 2 and the radial distance between the two roller shafts 2, a plurality of bearing inner rings 3 being capable of being placed on the two roller shafts 2 and being tangent to the two roller shafts 2 at the same time, the plurality of bearing inner rings 3 being divided into a plurality of groups of clamping by a plurality of bearing positioning assemblies, the rack 1 being provided with a plurality of oil stone holder shafts 4, the plurality of oil stone holder shafts 4 being respectively connected with oil stones 5, the bottom end of the oil stones 5 being capable of contacting the top side raceway of a group of bearing inner rings 3 clamped by the same bearing positioning assembly, so that the plurality of oil stones 5 are capable of machining the raceways of the plurality of groups of bearing inner rings 3 respectively when the two roller shafts 2 drive all the bearing inner rings 3 to rotate synchronously.

[0016] As shown in Figure 3 , the bearing positioning assembly comprises a coil spring 9, two side plates 7, two retaining rings 8, and two clamping plates 6, a plurality of bearing inner rings 3 of the same group being sleeved on the coil spring 9, and the end faces of the plurality of bearing inner rings 3 being sequentially abutted, so that the plurality of bearing inner rings 3 cooperatively form a cylindrical structure, the two side plates 7 and the two retaining rings 8 being sleeved on the coil spring 9, the two side plates 7 being respectively located at the two sides of the cylindrical structure in the axial direction, the retaining rings 8 being located between the side plates 7 and the cylindrical structure, one end of the retaining ring 8 in the axial direction being mounted on the side plate 7, and the other end of the retaining ring 8 in the axial direction being pressed on the end face of the bearing inner ring 3 located at the end position of the cylindrical structure.

[0017] As shown in Figure 3As shown, the two clamping plates 6 are arranged in the spiral structure of the coil spring 9, and the two sides of the clamping plate 6 are clamped by the adjacent two annular structures in the spiral structure of the coil spring 9, and the two clamping plates 6 are pressed on the side of the two side plates 7 away from the check ring 8 by the elastic force of the coil spring 9, so as to clamp the multiple bearing inner rings 3 in the same group in the axial direction, the number of the bearing inner rings 3 in the same group is determined according to the manual pushing of the operator, and the bearing inner ring 3 can move in the radial direction, so that the axial force between the bearing inner rings 3 is within a proper range, and the multiple bearing inner rings 3 in the same group can move freely under the radial pressure of the oil stone 5, that is, even if the multiple bearing inner rings 3 have radial deviation during clamping, the bearing inner rings 3 can maintain sufficient tangential contact with the roller shaft 2 during processing.

[0018] As shown in Figure 3 The end of the coil spring 9 in the axial direction is provided with a pull hook 10, so as to manually stretch the coil spring 9 and make the clamping plate 6 separate from the spiral structure of the coil spring 9. The clamping plate 6 near the pull hook 10 is provided with a hand holding ear part, which extends from the side plate 7 along the axial direction of the coil spring 9. When the bearing inner ring 3 needs to be removed from the bearing positioning assembly, the pull hook 10 is manually controlled to make the coil spring 9 elongate, the distance between the adjacent spiral structures of the coil spring 9 is increased, then the corresponding clamping plate 6 is taken out from the coil spring 9 through the hand holding ear part, and the coil spring 9 is moved in the axial direction from the side of the other clamping plate 6 to separate from the bearing inner ring 3, so that the two clamping plates 6 do not need to be adjusted at the same time during operation, which is convenient for operation.

Claims

1. An apparatus for batch ultra-precision machining of the inner ring (3) groove of a bearing, characterized in that: The machine includes a frame (1) with two rollers (2) installed. Multiple bearing inner rings (3) can be placed on the two rollers (2) and tangent to the two rollers (2) at the same time. Multiple bearing inner rings (3) are divided into multiple sets of clamps by multiple bearing positioning components. Multiple oilstone clamping shafts (4) are provided on the frame (1). Multiple oilstone clamping shafts (4) are respectively connected to oilstones (5). The bottom end of the oilstone (5) can contact the top side groove of a set of bearing inner rings (3) clamped by the same bearing positioning component, so that multiple oilstones (5) can process the grooves of multiple sets of bearing inner rings (3) when the two rollers (2) drive all bearing inner rings (3) to rotate synchronously. The bearing positioning assembly includes a helical spring (9), two side plates (7), two retaining rings (8), and two retaining plates (6). Multiple bearing inner rings (3) of the same group are all fitted on the helical spring (9), and the end faces of the multiple bearing inner rings (3) are sequentially fitted together to form a cylindrical structure. The two side plates (7) and the two retaining rings (8) are all fitted on the helical spring (9). The two side plates (7) are located on both sides of the cylindrical structure along the axial direction. The retaining rings (8) are located between the side plates (7) and the cylindrical structure. One end of the retaining ring (8) along the axial direction is installed on the side plate (7), and the other end of the retaining ring (8) along the axial direction is pressed into place. On the end face of the bearing inner ring (3) at the end of the cylindrical structure; two clamping plates (6) are both inserted in the spiral structure of the helical spring (9). The two adjacent annular structures in the spiral structure of the helical spring (9) clamp the two sides of the clamping plate (6), and the elastic force of the helical spring (9) makes the two clamping plates (6) press on the side of the two side plates (7) away from the retaining ring (8), thereby clamping multiple bearing inner rings (3) of the same group along the axial direction; a hook (10) is provided at one end of the helical spring (9) along the axial direction, so as to manually pull the helical spring (9) so that the clamping plate (6) can be disengaged from the spiral structure of the helical spring (9).

2. The apparatus for batch ultra-precision machining of bearing inner ring (3) raceways according to claim 1, characterized in that: The two rollers (2) include an active roller and a passive roller. The frame (1) is provided with a position adjustment device that can adjust the installation height of the two rollers (2) and the radial distance between the two rollers (2).

3. The apparatus for batch ultra-precision machining of bearing inner ring (3) grooves according to claim 1, characterized in that: A hand-held ear is provided on the plate (6) near the hook (10), and the hand-held ear extends from the side plate (7) along the axis of the coil spring (9).

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