阅读说明：本技术 一种轴承套圈超精加工的研磨装置 (Grinding device for superfinishing bearing ring ) 是由 陈升儒 赵国庆 司利敏 于 2021-08-12 设计创作，主要内容包括：本发明公开了一种轴承套圈超精加工的研磨装置,包括工作台、套圈夹具、套圈固定结构和至少一个油石定位结构,所述油石定位结构上设置有至少一个油石,所述油石移动机构用于带动所述油石移动以使所述油石研磨端靠近套圈；所述套圈固定结构用于固定套圈并带动所述套圈旋转；所述套圈夹具用于将套圈移动到套圈固定结构上或移除所述套圈移动结构上的套圈；所述套圈夹具、所述套圈固定结构和所述油石定位结构均设置在所述工作台上。本发明的轴承套圈超精加工的研磨装置能够完成不同方法、不同线型的套圈的精研,使套圈精研能够实现多品种、小批量、复杂产品的加工。(The invention discloses a grinding device for superfinishing a bearing ring, which comprises a workbench, a ring clamp, a ring fixing structure and at least one oilstone positioning structure, wherein at least one oilstone is arranged on the oilstone positioning structure, and an oilstone moving mechanism is used for driving the oilstone to move so as to enable a grinding end of the oilstone to be close to the ring; the ferrule fixing structure is used for fixing the ferrule and driving the ferrule to rotate; the ferrule holder is used for moving a ferrule onto a ferrule fixing structure or removing a ferrule on the ferrule moving structure; the ferrule clamp, the ferrule fixing structure and the oilstone positioning structure are all arranged on the workbench. The grinding device for superfinishing the bearing ring can finish the lapping of the bearing rings with different methods and different line types, so that the lapping of the bearing rings can realize the processing of various, small-batch and complex products.)

1. The utility model provides a grinder of bearing ring superfinishing which characterized in that: comprises a workbench, a ferrule clamp, a ferrule fixing structure and at least one oilstone positioning structure,

the oilstone positioning structure is provided with at least one oilstone, and the oilstone moving mechanism is used for driving the oilstone to move so that the oilstone grinding end is close to the ferrule;

the ferrule fixing structure is used for fixing a ferrule and driving the ferrule to rotate, and the center of the ferrule and the center of the oilstone are positioned on the same horizontal plane;

the ferrule holder is used for moving a ferrule onto a ferrule fixing structure or removing a ferrule on the ferrule moving structure;

the ferrule clamp, the ferrule fixing structure and the oilstone positioning structure are all arranged on the workbench.

2. The grinding apparatus for superfinishing a bearing ring according to claim 1, wherein: the oilstone positioning structure comprises an X-axis moving mechanism, a Y-axis moving mechanism and an oilstone rotating mechanism,

the oilstone rotating mechanism is arranged on the X-axis moving mechanism and is used for driving the oilstone to rotate;

the X-axis moving mechanism is arranged on the Y-axis moving mechanism and used for driving the oilstone to move in the X-axis direction;

and the Y-axis moving mechanism is arranged on the workbench and used for driving the oilstone to move in the Y-axis direction.

3. The grinding apparatus for superfinishing a bearing ring according to claim 2, wherein: the Y-axis moving mechanism comprises a Y-axis moving platform and a Y-axis moving lead screw, the Y-axis moving lead screw is arranged on the workbench, and the Y-axis moving platform is fixed on the Y-axis moving lead screw.

4. The grinding apparatus for superfinishing a bearing ring according to claim 3, wherein: the X-axis moving mechanism comprises an X-axis moving platform and an X-axis moving lead screw, the X-axis moving lead screw is arranged on the Y-axis moving platform, and the X-axis moving platform is fixed on the X-axis moving lead screw.

5. The grinding apparatus for superfinishing a bearing ring according to claim 4, wherein: the oilstone rotating mechanism comprises a rotating motor 25, an oilstone base is arranged on a rotating shaft of the rotating motor 25, at least one oilstone clamping mechanism is arranged on the oilstone base, and the oilstone is fixed on the oilstone clamping mechanism.

6. The grinding apparatus for superfinishing a bearing ring according to claim 5, wherein: the oilstone clamping mechanism comprises an oilstone frame, an oilstone pressing rod and a pressing rod driving mechanism, wherein the oilstone is horizontally placed on the oilstone frame and can horizontally slide, one end of the oilstone pressing rod is fixed on the pressing rod driving mechanism, the other end of the oilstone pressing rod is close to an oilstone stressed end, and the oilstone pressing rod moves towards the oilstone stressed end under the action of the pressing rod driving mechanism and contacts and drives the oilstone to horizontally move until the oilstone grinding end contacts the ferrule track.

7. The grinding apparatus for superfinishing a bearing ring according to claim 6, wherein: the compression bar driving mechanism comprises an oilstone pressurizing cylinder.

8. The grinding apparatus for superfinishing a bearing ring according to any one of claims 2 to 7, wherein: the ring clamping device comprises a conveying mechanism and at least one manipulator, the manipulator is arranged on the conveying mechanism, the conveying mechanism is used for driving the manipulator to horizontally move, and the manipulator can move up and down.

9. The grinding apparatus for superfinishing a bearing ring according to claim 3, wherein: the ferrule fixing structure comprises a supporting table, a ferrule rotating mechanism and a ferrule positioning mechanism, an arc-shaped groove is formed in the supporting table, the ferrule is arranged on the ferrule rotating mechanism, and the ferrule rotating mechanism drives the ferrule to move forwards until the ferrule abuts against the end face of the ferrule positioning mechanism.

10. The grinding apparatus for superfinishing a bearing ring according to claim 9, wherein: the ferrule positioning mechanism comprises a ferrule positioning disk.

Technical Field

The invention relates to the technical field of bearing ring processing, in particular to a grinding device for superfinishing a bearing ring.

Background

The rolling bearing is a mechanical part used on a large scale, and is used on a main shaft of a machine to support the main shaft to rotate. The bearing has high precision, low noise, small friction and reliable operation, so the processing precision of the rolling bearing is very high.

The rolling bearing is generally composed of basic parts such as an inner ring, an outer ring, a rolling body, a retainer and the like, and the rolling bearing is used as a part for supporting and reducing friction, and the precision and the roughness of a ring raceway play a very important role. The rolling bodies move on the raceways of the bearing ring, so that the shape of the raceways has different shapes according to the difference of the rolling bodies, the rolling bodies are generally spherical or cylindrical and also have conical rollers, and a small number of rollers are arc-shaped, and the shape of the raceways of the support ring is generally a straight line shape or an arc shape, although the specific shapes are slightly different, such as cylindrical or conical raceways, but the surface of the raceways is slightly modified on the basis of a straight line, such as a shape of a few micrometers to tens of micrometers protruding in the middle of a plain line in order to improve the load capacity and the service life under stress. The arc-shaped roller path has different arc radiuses according to the shape of the rolling body; the bearing adopts a spherical rolling body, a ring raceway is arc-shaped, and the arc radius of the raceway is slightly larger than the diameter of a ball; the bearing adopting the arc roller has the advantages that the arc radius of the raceway is larger according to the size of the arc radius of the roller. The raceway is composed of two arcs with the same radius and shape but different centers of circles at the same position to form a sharp arch arc.

The rolling bearing is required to have high precision and small friction in use, so that most parts of the rolling bearing have high processing precision, for example, a raceway, a rolling body and the like of an inner ring and an outer ring of the bearing, and the final motion surface is processed by adopting a mode of superfinishing and the like, so that the processing precision is improved and the friction loss is reduced by reducing the surface roughness.

In the bearing industry, lapping refers to the reciprocal grinding of a rotating work surface with an oilstone along a predetermined trajectory with a predetermined pressure, the trajectory having the same shape as the work surface. For example, the roller path is in a linear shape, and the oilstone oscillates in a linear direction in a reciprocating manner; the roller path is in an arc shape, the oilstone swings back and forth around the arc center, certain pressure is applied to the oilstone through certain oscillation or swinging frequency, a grinding effect is formed on the surface to be machined, and the surface quality of the machined part is improved. The main function is to greatly improve the microscopic quality of the processed surface, such as reducing surface roughness, waviness and the like, the workpiece rotates in the oscillating process of the oilstone, the circumferential surface can be processed, the oilstone oscillates or swings in a reciprocating manner under certain pressure, and the process foundation of lapping processing is provided.

In the prior art, in the lapping process of a bearing ring raceway, an oilstone and a clamping and moving mechanism thereof generally have only one degree of freedom, for example, swing around the center or reciprocate in one direction, so that the requirement of processing the bearing ring raceway is met, in the process of superfinishing the bearing ring raceway, according to the characteristic of the arc shape of the bearing ring raceway, the oilstone mechanism swings around the center of the raceway, the swinging center of the oilstone coincides with the center of the raceway, the raceway rotates, and the oilstone swings to grind the raceway in a reciprocating manner under certain pressure; in the superfinishing process of the roller bearing ring raceway, the shape of the plain line of the ring raceway is a straight line, and the oilstone and the mechanism thereof only do reciprocating motion in the straight line direction. The bearing that uses on automobile engine water pump, the rolling element that distributes 2 ~ 3 rows on the set of bearing, the rolling element is cylindrical roller and steel ball respectively, and present bearing lapping equipment, because the unicity of motion of oilstone mechanism, the lasso raceway of different shapes need adopt different super smart equipment, and equipment does not have the commonality, consequently has very big limitation.

In the process of lapping precision bearings or ferrules with high quality requirements, in order to meet the requirements of lapping efficiency and machining precision, a coarse and fine secondary grinding process is generally adopted. Firstly, grinding a ring roller path by using oilstone with coarse granularity and soft hardness at one station to enable the ground surface to achieve better precision, then conveying the ring to a second station, grinding by using oilstone with fine granularity and high hardness to enable the quality of the ground surface to achieve a very high level, and in order to meet the requirement of automation, conveying, installing, positioning and clamping a workpiece by using a material channel and a loading and unloading mechanism between the two stations.

Disclosure of Invention

The invention aims to solve the technical problem of providing a grinding device for superfinishing a bearing ring, and aims to solve the problems of large size and complex mechanism of bearing lapping equipment in the prior art.

In order to solve the technical problems, the technical scheme of the invention is as follows:

the utility model provides a grinder of bearing ring superfinishing which characterized in that: comprises a workbench, a ferrule clamp, a ferrule fixing structure and at least one oilstone positioning structure,

the oilstone positioning structure is provided with at least one oilstone, and the oilstone moving mechanism is used for driving the oilstone to move so that the oilstone grinding end is close to the ferrule;

the ferrule fixing structure is used for fixing a ferrule and driving the ferrule to rotate, and the center of the ferrule and the center of the oilstone are positioned on the same horizontal plane;

the ferrule holder is used for moving a ferrule onto a ferrule fixing structure or removing a ferrule on the ferrule moving structure;

the ferrule clamp, the ferrule fixing structure and the oilstone positioning structure are all arranged on the workbench.

Further: the oilstone positioning structure comprises an X-axis moving mechanism, a Y-axis moving mechanism and an oilstone rotating mechanism,

the oilstone rotating mechanism is arranged on the X-axis moving mechanism and is used for driving the oilstone to rotate;

the X-axis moving mechanism is arranged on the Y-axis moving mechanism and used for driving the oilstone to move in the X-axis direction;

and the Y-axis moving mechanism is arranged on the workbench and used for driving the oilstone to move in the Y-axis direction.

Further: the Y-axis moving mechanism comprises a Y-axis moving platform and a Y-axis moving lead screw, the Y-axis moving lead screw is arranged on the workbench, and the Y-axis moving platform is fixed on the Y-axis moving lead screw.

Further: the X-axis moving mechanism comprises an X-axis moving platform and an X-axis moving lead screw, the X-axis moving lead screw is arranged on the Y-axis moving platform, and the X-axis moving platform is fixed on the X-axis moving lead screw.

Further: the oilstone rotating mechanism comprises a rotating motor 25, an oilstone base is arranged on a rotating shaft of the rotating motor 25, at least one oilstone clamping mechanism is arranged on the oilstone base, and the oilstone is fixed on the oilstone clamping mechanism.

Further: the oilstone clamping mechanism comprises an oilstone frame, an oilstone pressing rod and a pressing rod driving mechanism, wherein the oilstone is horizontally placed on the oilstone frame and can horizontally slide, one end of the oilstone pressing rod is fixed on the pressing rod driving mechanism, the other end of the oilstone pressing rod is close to an oilstone stressed end, and the oilstone pressing rod moves towards the oilstone stressed end under the action of the pressing rod driving mechanism and contacts with the oilstone stressed end and drives the oilstone to horizontally move until the oilstone grinding end contacts with the ferrule track.

Further: the compression bar driving mechanism comprises an oilstone pressurizing cylinder.

Further: the ring clamping device comprises a conveying mechanism and at least one manipulator, the manipulator is arranged on the conveying mechanism, the conveying mechanism is used for driving the manipulator to horizontally move, and the manipulator can move up and down.

Further: the ferrule fixing structure comprises a supporting table, a ferrule rotating mechanism and a ferrule positioning mechanism, an arc-shaped groove is formed in the supporting table, the ferrule is arranged on the ferrule rotating mechanism, and the ferrule rotating mechanism drives the ferrule to move forwards until the ferrule abuts against the end face of the ferrule positioning mechanism.

Further: the ferrule positioning mechanism comprises a ferrule positioning disk.

By adopting the technical scheme, the oilstone positioning structure is provided with at least one oilstone positioning structure, and the oilstone positioning structure is provided with at least one oilstone, so that different bearing ring roller paths can be processed on one device, a plurality of same and different roller paths of one bearing ring can be processed simultaneously, and the same roller path can be finely ground in different steps.

Drawings

FIG. 1 is a schematic structural diagram of a grinding apparatus for superfinishing a bearing ring according to the present invention;

FIG. 2 is a schematic structural diagram of an oilstone positioning structure in the grinding device for superfinishing a bearing ring according to the present invention;

FIG. 3 is a side view of a oilstone positioning structure in the grinding device for superfinishing a bearing ring according to the present invention;

FIG. 4 is a schematic structural diagram of a ferrule fixing structure of the grinding apparatus for superfinishing a bearing ferrule according to the present invention;

fig. 5 is a sectional view of a ring fixing structure in the grinding apparatus for superfinishing a bearing ring according to the present invention.

In the figure, 1-workbench, 2-oilstone positioning structure, 21-Y-axis moving screw rod, 22-Y-axis moving platform, 23-X-axis moving screw rod, 24-X-axis moving platform, 25-rotating motor 25, 26-oilstone base, 27-oilstone frame, 28-oilstone press rod, 29-press rod driving mechanism, 3-ferrule, 41-mechanical arm, 42-conveying mechanism, 51-material channel, 52-blanking position, 6-oilstone, 71-supporting table, 72-positioning mandrel and 73-ferrule positioning plate.

Detailed Description

The following further describes embodiments of the present invention with reference to the drawings. It should be noted that the description of the embodiments is provided to help understanding of the present invention, but the present invention is not limited thereto. In addition, the technical features involved in the embodiments of the present invention described below may be combined with each other as long as they do not conflict with each other.

Examples

A grinding device for superfinishing a bearing ring comprises a workbench 1, a ring clamp, a ring fixing structure and at least one oilstone positioning structure 2, wherein in the embodiment of the invention, two oilstone positioning structures 2 are arranged as an example for illustration.

At least one oilstone 6 is arranged on the oilstone positioning structure 2, and in the embodiment of the invention, two oilstones 6 are taken as an example for illustration. The two oilstones 6 include a coarse oilstone 6 and a fine oilstone 6. The oilstone 6 moving mechanism is used for driving the oilstone 6 to move so that the grinding end of the oilstone 6 is close to the ferrule 3; the ferrule 3 fixing structure is used for fixing the ferrule 3 and driving the ferrule 3 to rotate, and the center of the ferrule 3 and the center of the oilstone 6 are positioned on the same horizontal plane; the ferrule 3 clamp is used to move the ferrule 3 onto the ferrule 3 fixing structure or remove the ferrule 3 on the ferrule 3 moving structure; and the ferrule 3 clamp, the ferrule 3 fixing structure and the oilstone positioning structure 2 are arranged on the workbench 1.

In the embodiment of the invention, the oilstone positioning structure 2 comprises an X-axis moving mechanism, a Y-axis moving mechanism and an oilstone 6 rotating mechanism, wherein the oilstone 6 rotating mechanism is arranged on the X-axis moving mechanism and is used for driving the oilstone 6 to rotate; the X-axis moving mechanism is arranged on the Y-axis moving mechanism and used for driving the oilstone 6 to move in the X-axis direction; the Y-axis moving mechanism is arranged on the workbench 1 and used for driving the oilstone 6 to move in the Y-axis direction.

Specifically, the Y-axis moving mechanism includes a Y-axis moving lead screw 22 and a Y-axis moving lead screw 21, the Y-axis moving lead screw 21 is disposed on the table 1, and the Y-axis moving lead screw 22 is fixed on the Y-axis moving lead screw 21.

The Y-axis moving screw 22 is driven by the Y-axis moving screw 21 to reciprocate in the Y-axis direction.

In the embodiment of the present invention, the Y-axis moving screw 21 is a ball screw driven by a servo motor, and the forward and reverse rotational motions of the servo motor are converted into the reciprocating linear motion of the Y-axis moving screw 22 by a ball screw nut.

In order to ensure that the Y-axis moving screw 22 can only reciprocate, guide rails are symmetrically installed on the left and right sides of the ball screw along the direction of the ball screw on the table 1 to prevent the Y-axis moving screw 22 from rotating and moving back and forth only in the Y-axis direction.

In the embodiment of the present invention, the X-axis moving mechanism includes an X-axis moving platform 24 and an X-axis moving lead screw 23, the X-axis moving lead screw 23 is disposed on the Y-axis moving lead screw 22, and the X-axis moving platform 24 is fixed on the X-axis moving lead screw 23.

The X-axis moving screw 23 is a ball screw driven by a servo motor, and the forward and reverse rotational motions of the servo motor are converted into the reciprocating linear motion of the Y-axis moving screw 22 by a ball screw nut.

In order to ensure that the X-axis moving platform 24 can only reciprocate, guide rails are symmetrically arranged on the left side and the right side of the ball screw on the Y-axis moving screw 22 along the direction of the ball screw to prevent the X-axis moving platform 24 from rotating and enabling the X-axis moving platform to only move back and forth in the X-axis direction.

The oilstone 6 rotating mechanism comprises a rotating motor 2526, and the rotating motor 2526 is vertically upward mounted on the Y-axis moving screw 22, i.e., the rotating shaft of the rotating motor 2526 is vertically upward.

An oilstone base 26 is arranged on a rotating shaft of the rotating motor 2526, at least one oilstone 6 clamping mechanism is arranged on the oilstone base 26, and the oilstone 6 is fixed on the oilstone 6 clamping mechanism. Since the embodiment of the present invention has been described by way of example with two oilstones 6, two clamping mechanisms for the oilstones 6 are provided on the oilstone base 26.

The two oilstone 6 clamping mechanisms have the same structure, but the oilstones 6 clamped by the clamping mechanisms can be different in granularity, hardness, shape and the like. For example, a set of oilstone 6 clamping mechanism can be used for installing coarse oilstones 6 with coarse granularity and soft hardness, so that the grinding efficiency is improved; and the other set of oilstone 6 clamping mechanism can be used for installing the fine-ground oilstone 6 with fine granularity and high hardness, so that the grinding precision is improved. Two sets of oilstone 6 clamping mechanisms are combined, so that the grinding efficiency and the grinding precision can be improved.

The two sets of oilstone 6 clamping mechanisms are switched by controlling the rotating motor 2526 to rotate by different angles. For example, after one set of oilstones 6 is operated, the rotating electric machine 2526 is rotated by 180 °, and the other set of oilstones 6 is operated. The working method can adopt the following methods: firstly, roughly grinding the oilstone 6 by adopting large-amplitude swinging, high-pressure and high-frequency reciprocating swinging, enabling a swinging angle of the reciprocating swinging to cover the whole surface of a raceway, carrying out strong grinding in a short time, then switching to large-amplitude, low-pressure and medium-frequency reciprocating swinging, enabling amplitude of the reciprocating swinging to be small to realize a moderate grinding effect, finally rotating a rotating motor 2526 for 180 degrees, finely grinding the oilstone 6, carrying out modification grinding in a short time by adopting large-amplitude, low-pressure and low-frequency reciprocating swinging, and then finishing grinding.

In the lapping process, the swing amplitude and position of the oilstone 6 can be continuously adjusted according to requirements, and different positions of the ground surface are processed in a targeted manner through the combination of the vibration frequency, the pressure and the grinding time of the oilstone 6, so that the processing quality and the processing efficiency are improved.

In the embodiment of the invention, the oilstone 6 clamping mechanism comprises an oilstone frame 27, an oilstone pressing rod 28 and a pressing rod driving mechanism 29, and the oilstone frame 27 and the pressing rod driving mechanism 29 are arranged on the oilstone base 26.

Specifically, since two oilstones 6 are provided, two oilstone frames 27 are symmetrically installed on the left and right sides of the oilstone base 26, and the strut driving mechanism 29 is installed at the center of the oilstone base 26.

The oilstone frame 27 is provided with a through hole, the oilstone 6 is horizontally placed in the through hole of the oilstone frame 27 and can horizontally slide in the through hole, the oilstone press rod 28 is fixed on the press rod driving mechanism 29 in the vertical direction, one end of the oilstone press rod 28 is fixed on the press rod driving mechanism 29, the other end of the oilstone press rod is close to the stressed end of the oilstone 6, the oilstone press rod 28 moves towards the stressed end of the oilstone 6 under the action of the press rod driving mechanism 29 and contacts with the stressed end of the oilstone 6 to drive the oilstone 6 to horizontally move until the grinding end of the oilstone 6 contacts with the ferrule 3 track, under the pressure action of the press rod driving mechanism 29, pressure is generated on the surface of the ferrule 3 track, the machined ferrule 3 rotates, and the oilstone 6 moves to form grinding. After the grinding is finished, the pressing rod driving mechanism 29 retracts to drive the pressing rod to retract, and the grinding is stopped.

In the embodiment of the present invention, the pressing rod driving mechanism 29 is a double-rod oilstone 6 pressurizing cylinder, and the double-rod oilstone 6 pressurizing cylinder is symmetrically provided with two pistons, which can be respectively used for driving the two oilstones 6 to move.

Because the two oilstone 6 clamping mechanisms have the same structure, only the structure of one oilstone 6 clamping mechanism is described here, and the structure of the other oilstone 6 clamping mechanism is not described again.

In the embodiment of the present invention, the ferrule holding device includes a conveying mechanism 42 and at least one manipulator 41, the manipulator 41 is disposed on the conveying mechanism 42, the conveying mechanism 42 is used for driving the manipulator 41 to move horizontally, and the manipulator 41 can move up and down.

The conveyor 42 may be a chain conveyor 42 or other conveyor 42, and the conveyor 42 may be movable in the X-axis direction. The specific structural model is not limited herein.

The number of the manipulators 41 is determined by the number of the oilstone positioning structures 2 and needs to be one more than the number of the oilstone positioning structures 2, and since the number of the oilstone positioning structures 2 is two in the embodiment of the invention, the number of the manipulators 41 should be 3. The robot 41 can reciprocate up and down in the Z-axis direction, and the grasping portion can be opened and closed.

During operation, 3 manipulators 41 simultaneously move downwards in the Z-axis direction to respectively grab the material channel 51 and the ferrules 3 on the two ferrule 3 fixing structures, then move upwards in the Z-axis direction, after reaching the position, the conveying mechanism 42 moves forwards (i.e. moves rightwards in the drawing) along the X-axis, after reaching the set position, the conveying mechanism 42 stops moving, the three manipulators 41 simultaneously move downwards in the Z-axis direction to respectively place the grabbed three ferrules 3 on the two ferrule 3 fixing structures and the blanking position 52. The ferrule 3 fixing structure positions and fixes the ferrule 3 at a machining position.

In the embodiment of the invention, the ferrule fixing structure comprises a supporting table 71, a ferrule rotating mechanism and a ferrule positioning mechanism, wherein an arc-shaped groove is arranged on the supporting table 71, the ferrule is arranged on the ferrule rotating mechanism, and the ferrule rotating mechanism drives the ferrule to move forwards until the ferrule abuts against the end surface of the ferrule positioning mechanism.

The support table 71 may be fixed to the base of the ferrule rotating mechanism or may be fixed to the table.

The ferrule rotating mechanism includes a ferrule rotating motor.

After the ferrule 3 is placed on the support table 71 by the manipulator 41, the positioning mandrel 72 of the ferrule rotating motor is inserted into the inner hole of the ferrule 3, the ferrule rotating motor moves towards the ferrule positioning disc 73 until the ferrule 3 abuts against the end face of the ferrule positioning disc 73, then the ferrule rotating motor rotates, the ferrule 3 rotates under the driving of the ferrule rotating motor, and the positioning mandrel 72 and the ferrule 3 synchronously rotate without friction or abrasion.

The parallel movement of the ferrule rotating motor can be realized by a lead screw, and the structure of the ferrule rotating motor is similar to that of an X-axis moving mechanism, so that the detailed description is omitted.

The rotation speed of the ferrule 3 is adjusted by a frequency converter and can be stopped, for example, during the process of placing or removing the ferrule 3, the rotation of the ferrule rotating motor 25 is stopped, and the ferrule 3 and the surface of the ferrule 3 which is subjected to the finish grinding can be protected.

In order to ensure that the centre of the ferrule 3 is level with the centre of the oilstone 6, the height of the centre of the ferrule 3 to be machined is a fixed constant value. The diameters of the ferrules 3 of different products are different, and the centers of the ferrules 3 can be kept unchanged by adjusting the positions of the support tables, so that the heights of the support tables can be adjusted in the embodiment of the invention.

The grinding device for superfinishing the bearing ring is used as follows:

after the ferrule 3 is positioned and clamped, it is rotated by a ferrule 3 rotating motor 2526.

The oilstone base 26 is driven by the servo motor to rapidly move in the directions of the X axis and the Y axis, and drives the coarse oilstone 6 to rapidly approach the surface to be processed of the ferrule 3. The rough grinding oilstone 6 is of a cuboid structure, a piston rod of a double-rod oilstone 6 pressurizing cylinder moves under the action of compressed air to drive the oilstone pressing rod 28 to move, the rough grinding oilstone 6 moves under the action of the oilstone pressing rod 28 until contacting with a machined surface, pressure is generated on the machined surface under the action of the pressure, the machined ferrule 3 rotates, and the rough grinding oilstone 6 moves to form grinding. After grinding, the piston rod of the pressurizing cylinder retracts to drive the pressure rod to retract, the processed ferrule 3 stops rotating, and the rotating motor 2526 rotates 180 degrees to enable the fine grinding oilstone 6 mechanism to enter a processing state. The piston rod of the double-rod oilstone 6 pressurizing cylinder moves under the action of compressed air to drive the oilstone pressing rod 28 to move, the lapping oilstone 6 moves under the action of the oilstone pressing rod 28 until contacting with the machined surface, pressure is generated on the machined surface under the action of the pressure, the machined ferrule 3 rotates, and the lapping oilstone 6 moves to form grinding. After the grinding is finished, the piston rod of the pressurizing cylinder retracts to drive the fine grinding pressure rod to retract, the processed ferrule 3 stops rotating, the rotating motor 2526 rotates by a set angle, and the rough grinding oilstone 6 enters the processing state again.

After rough grinding and fine grinding are finished, the oilstone base 26 is driven by a servo motor to rapidly move in the X-axis direction and the Y-axis direction to drive the oilstone 6 mechanism to rapidly separate from the surface to be processed of the ferrule 3, the rotating motor 2526 of the ferrule 3 stops rotating, the ferrule 3 is separated from a clamping state, the three mechanical arms 41 simultaneously move below the Z axis to respectively grab the material channel 51 and the ferrules 3 on the two fine grinding stations and then move above the Z axis to send signals after reaching the position, the conveying mechanism 42 moves to the right of the X axis to stop moving after reaching the set position, the conveying mechanism 42 sends signals and the three mechanical arms 41 move below the Z axis to respectively place the grabbed three ferrules 3 on the two ferrule 3 fixing structures and the blanking position 52. The ferrule 3 fixing structure positions and fixes the ferrule 3 at a machining position, and the ferrule 3 is rotated by a ferrule 3 rotating motor 2526. The rotation of the rotary motor 2526 for the ferrule 3 signals the oilstone positioning structure 2 to start a new machining cycle.

The embodiments of the present invention have been described in detail with reference to the accompanying drawings, but the present invention is not limited to the described embodiments. It will be apparent to those skilled in the art that various changes, modifications, substitutions and alterations can be made in these embodiments without departing from the principles and spirit of the invention, and the scope of protection is still within the scope of the invention.