A grinding wheel for machining raceways of double lip thrust tapered roller bearings

Abstract

The utility model provides a kind of grinding wheel for double flange thrust conical roller bearing raceway processing, including grinding wheel body, the bowl-shaped structure of uniform wall thickness of grinding wheel body, the wall thickness of grinding wheel body is less than the width of the bearing raceway.Through the bowl-shaped structure of uniform wall thickness of grinding wheel body is designed, and make the wall thickness of grinding wheel body less than the width of bearing raceway, on the one hand can adapt the raceway space structure of double flange thrust conical roller bearing, effectively avoid the interference of grinding wheel and the two flanges of bearing ring when grinding operation, to prevent raceway grinding and appear the defect of side after another;On the other hand, because wall thickness is less than the width of bearing raceway, can support using interpolation grinding mode to process raceway, it is convenient to accurately control grinding process on conventional vertical numerical control grinding machine, to better ensure the roughness, straightness, convexity and other key dimension precision of bearing raceway.

Description

Technical Field

[0001] This utility model relates to the field of bearing raceway machining technology, and in particular to a grinding wheel for machining the raceway of a double-sided thrust tapered roller bearing. Background Technology

[0002] In the manufacturing process of double-flange thrust tapered roller bearings, raceway machining is a crucial step in ensuring the overall performance and precision of the bearing. Currently, the industry generally relies on dedicated horizontal CNC grinding machines for grinding the raceways of this type of bearing. However, due to the fact that the structural design of traditional grinding wheels is not fully adapted to the raceway spatial characteristics of double-flange thrust tapered roller bearings, the grinding wheel is prone to interference with the two flanges of the bearing rings during grinding operations. This not only affects the stability of the machining process but also leads to "edge burrs" (irregular protrusions or burrs on the raceway edges) defects after grinding. Furthermore, limited by the interference problem between the grinding wheel and the flanges and the unreasonable grinding path, existing processes struggle to precisely control the surface quality and geometric accuracy of the raceway, failing to consistently guarantee the required core technical indicators such as roughness, straightness, and convexity. This negatively impacts the service life, load-bearing capacity, and operational reliability of the double-flange thrust tapered roller bearings and increases the cost and difficulty of subsequent finishing processes. Utility Model Content

[0003] The purpose of this invention is to provide a grinding wheel for machining the raceway of a double-sided thrust tapered roller bearing, in order to solve the problems mentioned in the background art.

[0004] This utility model provides a grinding wheel for machining the raceway of a double-sided thrust tapered roller bearing, comprising a grinding wheel body, wherein the grinding wheel body is a bowl-shaped structure with uniform wall thickness, and the wall thickness of the grinding wheel body is less than the width of the bearing raceway.

[0005] Furthermore, the wall thickness of the grinding wheel body is less than 1 / 5 of the width of the bearing raceway.

[0006] Furthermore, the angle b between the outer conical surface of the grinding wheel body and its own axis is 20°.

[0007] Furthermore, a connecting hole for connecting the vertical spindle of the grinding machine is provided at the axial position of the grinding wheel body.

[0008] Furthermore, the corners of the grinding wheel body have a rounded transition structure.

[0009] Furthermore, the top of the grinding wheel body is provided with multiple reinforcing ribs along the circumferential direction.

[0010] Furthermore, the plurality of reinforcing ribs are arranged at equal intervals along the axial direction of the grinding wheel body.

[0011] Furthermore, the grinding end face of the grinding wheel body is an inclined surface.

[0012] Furthermore, when the grinding wheel body is installed, the angle between its axis and the vertical direction is α, and the angles α and β are equal.

[0013] Furthermore, the reinforcing rib is integrally formed with the grinding wheel body.

[0014] The technical solution of this utility model designs the grinding wheel body as a bowl-shaped structure with uniform wall thickness, and makes the wall thickness of the grinding wheel body smaller than the width of the bearing raceway. On the one hand, it can adapt to the raceway space structure of double-blade thrust tapered roller bearings, effectively avoiding interference between the grinding wheel and the two blades of the bearing ring during grinding operations, thereby preventing edge defects after the raceway is ground. On the other hand, because the wall thickness is smaller than the width of the bearing raceway, it can support the use of interpolation grinding to process the raceway, which is convenient for precise control of the grinding process on a conventional vertical CNC grinding machine, thereby better ensuring the accuracy of key dimensions such as roughness, straightness, and convexity of the bearing raceway. Attached Figure Description

[0015] To more clearly illustrate the specific embodiments of this utility model or the technical solutions in the prior art, the drawings used in the description of the specific embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are some embodiments of this utility model. For those skilled in the art, other drawings can be obtained from these drawings without creative effort.

[0016] Figure 1 This is a cross-sectional view of the first grinding position of the grinding wheel in this utility model.

[0017] Figure 2 This is a cross-sectional view of the second grinding position of the grinding wheel in this utility model.

[0018] Explanation of reference numerals in the attached drawings: 1-grinding wheel body, 101-grinding end face, 2-bearing ring, 201-raceway, 202-oil groove, 3-reinforcing rib. Detailed Implementation

[0019] The technical solution of this utility model will be clearly and completely described below with reference to the embodiments. Obviously, the described embodiments are only some embodiments of this utility model, not all embodiments. Based on the embodiments of this utility model, all other embodiments obtained by those skilled in the art without creative effort are within the protection scope of this utility model.

[0020] In the description of this utility model, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", etc., indicating the orientation or positional relationship are based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing this utility model and simplifying the description, and are not intended to indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this utility model.

[0021] Furthermore, 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 indicated technical features. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of the stated features. In the description of this utility model, "a plurality of" means two or more, unless otherwise explicitly specified. Furthermore, the terms "installed," "connected," and "linked" 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; they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.

[0022] like Figures 1-2 As shown, this utility model provides a grinding wheel for machining the raceway of a double-sided thrust tapered roller bearing. The grinding wheel body is a bowl-shaped structure with uniform wall thickness. The wall thickness of the grinding wheel body is less than the width of the bearing raceway. In this embodiment, the specific configuration is: the wall thickness of the grinding wheel body is less than 1 / 5 of the bearing raceway width; the angle b between the outer conical surface of the grinding wheel body and its own axis is 20°; when the grinding wheel body is installed, the angle between its axis and the vertical direction is α, and the angles α and αb are equal. This angle and positional relationship ensures that there is no interference between the grinding wheel and the two sides of the bearing raceway during grinding, and that the raceway does not experience edge slippage. Furthermore, the inclined grinding wheel body grinds the bearing raceway, and setting the wall thickness of the grinding wheel body to be less than 1 / 5 of the bearing raceway width effectively prevents overheating of the grinding surface.

[0023] A connecting hole for connecting the vertical spindle of the grinding machine is provided at the axial position of the grinding wheel body.

[0024] In order to improve the strength of the grinding wheel body, the corners of the grinding wheel body are all designed with rounded transition structures. The top of the grinding wheel body is provided with multiple reinforcing ribs integrally formed with it along the circumference. The multiple reinforcing ribs are evenly spaced along the axial direction of the grinding wheel body.

[0025] Compared to the previous method using a dedicated horizontal CNC grinding machine, this grinding process for raceways can be performed more efficiently using a commonly used vertical CNC grinding machine. During installation, the grinding wheel axis of the CNC grinding machine is rotated by an angle 'a', making the grinding end face of the grinding wheel beveled. This angle allows the grinding end face to fully engage with the bearing raceway. Using a vertical CNC grinding machine and a specific program for interpolation grinding, the grinding end face of the grinding wheel reciprocates across the raceway surface between the two flanges, grinding the raceway. Interpolation grinding better ensures the surface roughness, straightness, and convexity of the bearing raceway. The outer diameter of the cup-shaped grinding wheel must be smaller than the diameter of the large flange of the bearing ring, and the inner diameter of the cup-shaped grinding wheel must be larger than the diameter of the small flange of the bearing ring.

[0026] This grinding method can eliminate interference between the grinding wheel and the bearing flange, as well as raceway edge drop: Compared to the previous method of grinding the raceway using a horizontal spindle, which is very easy to produce edge drop regardless of the diameter of the grinding wheel, and the two flanges of the grinding wheel and the bearing are also prone to interference.

[0027] Before grinding, move the grinding wheel to a position 1mm away from the two flanges of the bearing race. Ensure the outer diameter of the grinding wheel enters the oil groove as much as possible without the outer side of the grinding wheel contacting the flanges. This prevents the raceway from crumbling after grinding. Record the coordinate values ​​of the grinding wheel at these two extreme positions. Set appropriate grinding parameters in the CNC grinding machine system, allowing the grinding wheel to reciprocate within the two recorded coordinate positions to grind the raceway to the dimensions required by the drawing.

[0028] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of this utility model, and are not intended to limit it. Although the utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some or all of the technical features therein. Such modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of this utility model.

Claims

1. A grinding wheel for machining the raceway of a double-flanged thrust tapered roller bearing, characterized in that, It includes a grinding wheel body, which is a bowl-shaped structure with uniform wall thickness, and the wall thickness of the grinding wheel body is less than the width of the bearing raceway.

2. The grinding wheel for double lip thrust taper roller bearing raceway machining according to claim 1, characterized in that, The wall thickness of the grinding wheel body is less than 1 / 5 of the width of the bearing raceway.

3. The grinding wheel for double lip thrust taper roller bearing raceway machining according to claim 1, characterized in that, The angle b = 20° between the outer conical surface of the grinding wheel and its own axis.

4. The grinding wheel for double lip thrust taper roller bearing raceway machining of claim 1, wherein, The grinding wheel body has a connecting hole at its axial center for connecting to the vertical spindle of the grinding machine.

5. The grinding wheel for double lip thrust taper roller bearing raceway machining of claim 1 wherein, The corners of the grinding wheel body have a rounded transition structure.

6. The grinding wheel for double lip thrust taper roller bearing raceway machining of claim 1, wherein, The top of the grinding wheel body is provided with multiple reinforcing ribs along the circumferential direction.

7. The grinding wheel for double lip thrust taper roller bearing raceway machining according to claim 6, characterized in that, The reinforcing ribs are arranged at equal intervals along the axial direction of the grinding wheel body.

8. The grinding wheel for machining the raceway of a double-sided thrust tapered roller bearing according to claim 1, characterized in that, The grinding end face of the grinding wheel body is an inclined surface.

9. The grinding wheel for machining the raceway of a double-sided thrust tapered roller bearing according to claim 3, characterized in that, When the grinding wheel body is installed, the angle between its axis and the vertical direction is α, and the angles α and αb are equal.

10. The grinding wheel for double lip thrust taper roller bearing raceway machining of claim 6, wherein, The reinforcing rib is integrally formed with the grinding wheel body.

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