A bearing chamfer polishing assembly and polishing device

Abstract

The utility model relates to a polishing technology field, concretely relates to a bearing chamfer's polishing assembly and polishing device, wherein the polishing assembly includes: the polishing wheel and magnetic attraction revolving stage that are set up up and down along the direction of Z axle, the direction of rotation of polishing wheel is opposite with the direction of rotation of magnetic attraction revolving stage, is equipped with a plurality of avoidance notches that are circularly distributed on the top of magnetic attraction revolving stage, is equipped with circular ring groove on the lower surface of polishing wheel, and the circular ring groove has the first chamfer polishing surface that contacts the inner chamfer of one end of the bearing to be polished, and the circular ring groove has the second chamfer polishing surface that contacts the outer chamfer of one end of the bearing to be polished. In the utility model, the contact surface is circular ring curved surface when polishing by the polishing wheel, greatly improves the contact area, and the polishing efficiency is higher, and the purpose that simultaneously carries out the complete polishing of bearing inner and outer chamfer is realized, and there is no risk of missing polishing, color spot or tiny burr.

Description

Technical Field

[0001] This utility model relates to the field of polishing technology, and more specifically, to a polishing component and polishing device for bearing chamfering. Background Technology

[0002] The manufacturing precision requirements for ultra-high speed precision bearings are extremely high. The design dimensions of the bearing chamfer are subject to relevant standards. The chamfer is machined by turning, and cannot be re-machined in subsequent grinding processes. Turning results in a rougher texture compared to grinding and is prone to burrs. During the production of precision bearings, after turning, they undergo heat treatment and multiple grinding processes, including a tempering process. Because the chamfer surface texture is relatively rough, it is easy for very small impurities or dirt to remain. Over long-term use, electrochemical reactions can occur, corroding the chamfer and causing rust and discoloration. Therefore, before the final grinding and after the final tempering, the chamfer of the bearing rings needs to be polished to deburr, remove rust spots, eliminate discoloration, and polish the texture. This prevents rust and discoloration at the source, ensuring that the rings do not develop more severe rust and discoloration during subsequent use and storage of the finished bearings.

[0003] Most existing metal polishing technologies on the market are handheld, magnetic polishing machines, or other vibratory polishing technologies, which mainly have the following problems: Manual polishing with handheld polishing tools requires manually locating and precisely polishing the areas to be polished. During manual searching, small spots, impurities, or burrs left over from the manufacturing process are easily missed. Furthermore, manual polishing can result in noticeable color differences on chamfered surfaces, affecting product sales. It is also difficult to control the pressure during manual polishing, which can easily polish other delicate, unpolished surfaces, damaging the precision of the bearing rings.

[0004] Other similar magnetic polishing machines rely on polishing materials to remove blemishes or impurities. However, very small blemishes may not be completely removed, failing to achieve full-area, absolute polishing of the surface. Furthermore, the polishing material may come into contact with all surfaces of the bearing race, removing material from non-beveled areas. Bearing races are already very precise at this stage, leaving little allowance for subsequent ultra-precision grinding, making it impossible to remove the pits created by this polishing process. In particular, the dimensions of the inner surface of the bearing inner race, the outer surface of the bearing outer race, and the raceway surfaces of the rolling elements on both races require extremely precise control, falling within the μm range. Using this polishing method would severely compromise the precision of the bearing races. Moreover, these machines operate in batch processing; during batch processing, bearing races may collide with each other, creating new burrs or scratches. Batch processing requires overall batch balance, resulting in individual variations in polishing effects between workpieces. Utility Model Content

[0005] In view of this, the present invention provides a polishing component and polishing device for bearing chamfering, which aims to solve the problems of existing technology that easily polishes to the point of non-polishing and is easy to polish incompletely during the polishing process.

[0006] This utility model discloses a polishing assembly for bearing chamfering, comprising a polishing wheel and a magnetic turntable arranged vertically along the Z-axis. The rotation direction of the polishing wheel is opposite to that of the magnetic turntable. The top of the magnetic turntable is provided with a plurality of circumferentially distributed clearance notches. The lower surface of the polishing wheel is provided with an annular groove. The annular groove has a first chamfer polishing surface that contacts the inner chamfer of one end of the bearing to be polished, and a second chamfer polishing surface that contacts the outer chamfer of one end of the bearing to be polished.

[0007] Preferably, the polishing assembly for bearing chamfering further includes a rotary driver and a pressure driver mounted on a frame. A polishing wheel is connected to the drive shaft of the rotary driver, and the drive end of the pressure driver is connected to the rotary driver via a pressure arm, driving the rotary driver to move along the Z-axis.

[0008] Preferably, the lower pressure arm is provided with a buffer reset structure, at least a portion of which is provided on the lower pressure arm and the remaining portion is provided on the lower pressure driver.

[0009] Preferably, the buffer reset structure includes a pressing elastic element disposed on one side of the lower pressure arm and a pressing reset pull rod disposed on the other side of the lower pressure arm; one end of the pressing reset pull rod passes through the lower pressure arm and is connected to the pressing elastic element, and the other end is connected to the driving end of the lower pressure driver.

[0010] Preferably, a downward pressure limit structure is provided between the downward pressure arm and the frame.

[0011] Preferably, the pressure limit limiting structure includes a pressure limit limiting groove and a pressure limit limiting member, the top end of the pressure limit limiting member extending into the pressure limit limiting groove, one of the pressure limit limiting groove and the pressure limit limiting member being disposed on the frame, and the other being disposed on the pressure arm.

[0012] Preferably, the annular groove has a clearance space to avoid the sidewall of the bearing to be polished.

[0013] Preferably, the polishing wheel is a nylon fiber nonwoven polishing wheel.

[0014] Compared with the prior art, the beneficial effects of this utility model are as follows: First, a circular groove is provided on the lower surface of the polishing wheel, and a chamfer contact surface is provided within the circular groove to contact the bearing chamfer. Compared with the traditional polishing wheel, which measures radially downwards during processing, and where the traditional polishing wheel makes line contact with the bearing race, the contact surface of the polishing wheel in this application is a circular curved surface, which greatly increases the contact area and improves polishing efficiency. Furthermore, the chamfer contact surface in this application includes a first chamfer polishing surface that contacts the inner chamfer and a second chamfer polishing surface that contacts the outer chamfer, enabling simultaneous and complete polishing of both the inner and outer chamfers of the bearing, eliminating the risk of incomplete polishing, discolored spots, or microburrs.

[0015] Secondly, the magnetic turntable rotates in opposite directions to the polishing wheel, causing the bearing to be polished on the turntable and the polishing wheel to slide at high speed during the polishing process, resulting in high polishing efficiency. At the same time, the roughness of the inner and outer chamfers is greatly reduced after polishing, approaching a mirror finish, which brightens the chamfers and improves the aesthetics.

[0016] Third, several circularly distributed clearance notches are set on the top of the magnetic turntable to reduce the magnetic contact area between the magnetic turntable and the bearing to be polished, so as to prevent the bearing to be polished from being unable to move after the magnetic function of the magnetic turntable is turned off.

[0017] This application also provides a polishing device, including a frame, on which a first polishing station, a flipping station and a second polishing station are sequentially arranged, and the first polishing station and the second polishing station are provided with the polishing components for the bearing chamfer.

[0018] Preferably, the flipping station includes a flipping driver, a flipping table connected to the drive end of the flipping driver, and two clamping arms disposed opposite to each other on the flipping table, with a receiving space between the two clamping arms for accommodating the bearing to be polished.

[0019] It is understood that the polishing device of this application has the same beneficial effect as the polishing component for the bearing chamfer. At the same time, it adopts a dual polishing station design. First, the first polishing station polishes the inner and outer chamfers of one end of the bearing to be polished. Then, the flipping station flips the bearing to be polished, and the second polishing station polishes the inner and outer chamfers of the other end of the bearing to be polished. This allows the bearing to be polished to have all four chamfers at both ends polished in one pass, which greatly improves the polishing efficiency. Attached Figure Description

[0020] Various other advantages and benefits will become apparent to those skilled in the art upon reading the following detailed description of preferred embodiments. The accompanying drawings are for illustrative purposes only and are not intended to limit the scope of the invention. Furthermore, the same reference numerals denote the same parts throughout the drawings. In the drawings: Figure 1A three-dimensional structural schematic diagram of a polishing assembly for bearing chamfering provided for an embodiment of this utility model; Figure 2 A cross-sectional view of a polishing assembly for bearing chamfering provided in an embodiment of this utility model; Figure 3 A three-dimensional structural schematic diagram of the polishing wheel provided in an embodiment of this utility model; Figure 4 A three-dimensional structural diagram of the bearing to be polished provided for an embodiment of this utility model; Figure 5 A cross-sectional view of the polishing wheel and the bearing to be polished provided in an embodiment of this utility model; Figure 6 A three-dimensional structural diagram of the magnetic turntable provided in an embodiment of this utility model; Figure 7 A three-dimensional structural diagram of the buffer reset structure provided in the embodiment of this utility model; Figure 8 A schematic diagram of the downward pressure limit limiting structure provided in an embodiment of this utility model; Figure 9 A three-dimensional structural diagram of the flipping station provided in an embodiment of this utility model.

[0021] In the diagram: 1. Polishing wheel; 11. Circular groove; 111. First chamfered polishing surface; 112. Second chamfered polishing surface; 113. Clearance space; 2. Magnetic turntable; 21. Clearance notch; 22. Iron magnetic end face support; 23. Filler block; 3. Bearing to be polished; 31. Inner chamfer; 32. Outer chamfer; 4. Rotary driver; 5. Downward driver; 6. Downward pressure arm; 71. Downward elastic element; 72. Downward reset pull rod; 721. Pushing boss; 81. Downward limit groove; 82. Downward limit element; 10. First polishing station; 20. Tilting station; 201. Tilting driver; 202. Tilting table; 203. Clamping arm; 204. Accommodation space; 30. Second polishing station; 40. Frame; 41. Linear slide rail module. Detailed Implementation

[0022] The specific embodiments of this utility model will be described in further detail below with reference to the accompanying drawings and examples. The following examples are used to illustrate this utility model, but are not intended to limit its scope.

[0023] In the description of this application, it should be understood that the terms "center", "upper", "lower", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this application.

[0024] The terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Therefore, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of this application, unless otherwise stated, "a plurality of" means two or more.

[0025] In the description of this application, it should be noted that, unless otherwise expressly specified and limited, the terms "installation," "connection," and "joining" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection between two components. Those skilled in the art can understand the specific meaning of the above terms in this application based on the specific circumstances. Example 1

[0026] Combination Figure 1 , Figure 3 , Figure 4 , Figure 5 As shown, this embodiment provides a polishing assembly for bearing chamfering, including a polishing wheel 1 and a magnetic turntable 2 arranged vertically along the Z-axis. The bearing 3 to be polished is magnetically fixed on the magnetic turntable 2, eliminating the need for other tooling fixtures and improving loading and unloading efficiency. Furthermore, the bearing 3 rotates at high speed with the turntable, eliminating the need for manual polishing. A circular groove 11 is provided on the lower surface of the polishing wheel 1. The circular groove 11 has a first chamfering polishing surface 111 that contacts the inner chamfer 31 of one end of the bearing 3 to be polished, and a second chamfering polishing surface 112 that contacts the outer chamfer 32 of one end of the bearing 3 to be polished.

[0027] It is understandable that the first chamfered polishing surface 111 and the second chamfered polishing surface 112 within the annular groove 11 perfectly align with the contours of the inner chamfer 31 and outer chamfer 32 of the bearing, respectively. Compared to the traditional polishing wheel 1 where there is a line contact between the polishing wheel 1 and the bearing, in this embodiment, the polishing wheel 1 polishes downwards axially, and the contact surface during polishing is an annular curved surface, greatly increasing the contact area and improving polishing efficiency. Simultaneously, because the contours are closely aligned, the overall polishing downwards ensures uniform polishing, preventing color differences caused by uneven polishing. Furthermore, it allows for simultaneous and complete polishing of both inner and outer chamfers, eliminating the risk of missed polishing, discolored spots, or microburrs.

[0028] Furthermore, the annular groove 11 has a clearance space 113 to avoid the side wall of the bearing 3 to be polished. During polishing, the inner circular surface of the inner ring of the bearing, the outer circular surface of the outer ring of the bearing, and the raceway surface of the rolling elements on the inner and outer rings of the bearing will not be polished, thus avoiding damage to the precision of the bearing ring.

[0029] Furthermore, the polishing wheel 1 is a nylon fiber non-woven polishing wheel 1. The nylon fiber non-woven polishing wheel 1 is relatively soft and dense, and its texture is softer than that of grinding wheels, files, or metal polishing particles. It will not produce a large amount of polishing material on the chamfer, thus significantly altering the chamfer dimensions of the bearing ring. Simultaneously, the rotation direction of the polishing wheel 1 is opposite to the rotation direction of the magnetic turntable 2, causing high-speed relative sliding between the bearing 3 to be polished and the polishing wheel 1. This results in fast polishing efficiency, significantly reduced roughness after chamfer polishing, approaching a mirror finish, and a brightening effect on the chamfer, resulting in a very aesthetically pleasing appearance.

[0030] Furthermore, combined Figure 6 As shown, several circularly distributed clearance notches 21 are provided on the top of the magnetic turntable 2, which can reduce the magnetic contact area between the magnetic turntable 2 and the bearing 3 to be polished, and prevent the bearing 3 to be polished from being unable to move after the magnetic function of the magnetic turntable 2 is turned off.

[0031] Furthermore, the polishing assembly for bearing chamfering also includes a rotary driver 4 and a pressure driver 5 mounted on the frame 40. A polishing wheel 1 is connected to the power shaft of the rotary driver 4, and the polishing wheel 1 can rotate electrically, eliminating the need for manual polishing. The drive end of the pressure driver 5 is connected to the rotary driver 4 via a pressure arm 6, driving the rotary driver 4 to move along the Z-axis. The pressure arm 6 applies the driving force of the pressure driver 5 to the rotary driver 4, ensuring accurate force transmission and thus driving the rotary driver 4 to move along the Z-axis.

[0032] Specifically, the rotary actuator 4, such as a stepper motor or servo motor, achieves stable rotation of the polishing wheel 1 by precisely controlling the speed and direction of the power shaft. The pressure actuator 5, such as a cylinder or electric push rod, ensures that the force exerted by the pressure arm 6 on the rotary actuator 4 is evenly distributed by providing smooth linear motion.

[0033] Furthermore, combined Figure 7 and Figure 8 As shown, a buffer reset structure is provided on the lower pressure arm 6. At least part of the buffer reset structure is provided on the lower pressure arm 6, and the remaining part is provided on the lower pressure driver 5. The buffer reset structure includes a lower pressure elastic member 71 provided on one side of the lower pressure arm 6, and a lower pressure reset pull rod 72 provided on the other side of the lower pressure arm 6. One end of the lower pressure reset pull rod 72 passes through the lower pressure arm 6 and is connected to the lower pressure elastic member 71, and the other end is connected to the drive end of the lower pressure driver 5.

[0034] Specifically, the pressure elastic element 71 is, for example, a pressure spring. The drive end of the pressure driver 5 can be threadedly connected to the pressure reset lever 72. Since the pressure reset lever 72 is also connected to the pressure elastic element 71, the downward loading of the pressure arm 6 driven by the pressure driver 5 is a flexible loading. The pressure elastic element 71 can absorb impact energy, thereby slowing down the movement speed of the pressure arm 6 and playing a buffering role. After polishing is completed, the pressure driver 5 moves upward along the Z-axis to the upper limit position, and the pressure elastic element 71 releases and returns to its original state. The lower part of the pressure reset lever 72 has a push boss 721, and the pressure elastic element 71 pushes the pressure arm 6 upward to reset via the push boss 721.

[0035] Furthermore, a downward pressure limit structure is provided between the downward pressure arm 6 and the frame 40. The downward pressure limit structure includes a downward pressure limit groove 81 and a downward pressure limit member 82. The top end of the downward pressure limit member 82 extends into the downward pressure limit groove 81. One of the downward pressure limit groove 81 and the downward pressure limit member 82 is provided on the frame 40, and the other is provided on the downward pressure arm 6.

[0036] Specifically, the downward pressure limit stop 82 is preferably two, such as heavy-duty spring plungers. When the pressure arm 6 is pressing down, the heavy-duty spring plunger will gradually compress. Once the preset downward pressure limit position is reached, the heavy-duty spring plunger will generate resistance, preventing the pressure arm 6 from pressing down further, thereby protecting the polishing wheel 1 and the bearing 3 to be polished from excessive force damage.

[0037] Furthermore, combined Figure 2 As shown, a linear guide module 41 is provided between the rotary drive 4 and the frame 40, which helps to achieve smooth movement and precise positioning of the rotary drive 4 on the frame 40.

[0038] Furthermore, combined Figure 6As shown, the magnetic turntable 2 preferably has an iron magnetic end face support 22. The bearing 3 to be polished is placed on the iron magnetic end face support 22, and at this time, several clearance notches 21 are distributed circumferentially on the top of the iron magnetic end face support 22. In order to accommodate various bearing models, a filler block 23 can be added to the iron magnetic end face support 22 to adjust the size of the support surface.

[0039] Specifically, the working principle of the polishing assembly for the bearing chamfer in this embodiment is as follows: During the polishing operation, first place the bearing 3 to be polished with one end face upwards on the magnetic turntable 2, and activate the magnetic attraction function of the turntable 2 to fix it in place. Then, the downward pressure cylinder moves down to the lower limit position, and through the downward pressure arm 6, drives the rotary driver 4 down to the lower limit position, so that the first chamfered polishing surface 111 and the second chamfered polishing surface 112 in the annular groove 11 of the polishing wheel 1 contact the inner chamfer 31 and the outer chamfer 32 of one end face of the bearing 3 to be polished, respectively. Next, activate the rotation function of the magnetic turntable 2 and the polishing wheel 1, so that they rotate in opposite directions. After the polishing operation is completed, first turn off the rotation function, and then turn off the magnetic attraction function. Example 2

[0040] This embodiment provides a polishing device, including a frame 40, on which a first polishing station, a flipping station and a second polishing station are sequentially arranged, and a polishing component for bearing chamfering is arranged on the first polishing station and the second polishing station.

[0041] Preferred, combined Figure 9 As shown, the flipping station includes a flipping driver 201, a flipping table 202 connected to the drive end of the flipping driver 201, and two clamping arms 203 arranged opposite to each other on the flipping table 202. There is a receiving space 204 between the two clamping arms 203 to accommodate the bearing 3 to be polished.

[0042] Understandably, the dual polishing station design involves first polishing the inner and outer chamfers of one end of the bearing 3 to be polished at the first polishing station, and then flipping the bearing 3 to be polished at the second polishing station to polish the inner and outer chamfers of the other end of the bearing 3 to be polished. This allows the bearing 3 to be polished to complete all four chamfers at both ends in one pass, greatly improving polishing efficiency.

[0043] It will be understood by those skilled in the art that the above description is merely a preferred embodiment of the present utility model and is not intended to limit the present utility model. Although the present utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.

Claims

1. A polishing assembly for bearing chamfering, comprising a polishing wheel (1) and a magnetic turntable (2) arranged vertically along the Z-axis, characterized in that, The rotation direction of the polishing wheel (1) is opposite to that of the magnetic turntable (2). Several circularly distributed clearance notches (21) are provided on the top of the magnetic turntable (2). A circular groove (11) is provided on the lower surface of the polishing wheel (1). The circular groove (11) has a first chamfered polishing surface (111) that contacts the inner chamfer (31) of one end of the bearing (3) to be polished, and a second chamfered polishing surface (112) that contacts the outer chamfer (32) of one end of the bearing (3) to be polished.

2. The polishing assembly for bearing chamfering according to claim 1, characterized in that, It also includes a rotary driver (4) and a pressure driver (5) mounted on the frame (40). A polishing wheel (1) is connected to the power shaft of the rotary driver (4). The driving end of the pressure driver (5) is connected to the rotary driver (4) through a pressure arm (6) and drives the rotary driver (4) to move along the Z-axis.

3. The polishing assembly for bearing chamfering according to claim 2, characterized in that, The lower pressure arm (6) is provided with a buffer reset structure, at least part of which is provided on the lower pressure arm (6) and the remaining part is provided on the lower pressure driver (5).

4. The polishing assembly for bearing chamfering according to claim 3, characterized in that, The buffer reset structure includes a pressure elastic member (71) disposed on one side of the pressure arm (6) and a pressure reset pull rod (72) disposed on the other side of the pressure arm (6); one end of the pressure reset pull rod (72) passes through the pressure arm (6) and is connected to the pressure elastic member (71), and the other end is connected to the drive end of the pressure driver (5).

5. A polishing assembly for bearing chamfering according to claim 2, characterized in that, A pressure limit structure is provided between the pressure arm (6) and the frame (40).

6. A polishing assembly for bearing chamfering according to claim 5, characterized in that, The pressure limit limiting structure includes a pressure limit limiting groove (81) and a pressure limit limiting member (82). The top end of the pressure limit limiting member (82) extends into the pressure limit limiting groove (81). One of the pressure limit limiting groove (81) and the pressure limit limiting member (82) is disposed on the frame (40), and the other is disposed on the pressure arm (6).

7. A polishing assembly for bearing chamfering according to claim 1, characterized in that, The annular groove (11) has a clearance space (113) to avoid the side wall of the bearing (3) to be polished.

8. A polishing assembly for bearing chamfering according to claim 2, characterized in that, The polishing wheel (1) is a nylon fiber nonwoven polishing wheel (1).

9. A polishing apparatus, comprising a frame (40), characterized in that, The frame (40) is provided with a first polishing station, a flipping station and a second polishing station in sequence, and the first polishing station and the second polishing station are provided with a polishing component for bearing chamfering as described in any one of claims 1-8.

10. A polishing apparatus according to claim 9, characterized in that, The flipping station includes a flipping driver (201), a flipping table (202) connected to the drive end of the flipping driver (201), and two clamping arms (203) arranged opposite to each other on the flipping table (202), with a receiving space (204) between the two clamping arms (203) for accommodating the bearing (3) to be polished.

Images