Bearing ring raceway grinding wheel and bearing ring raceway grinding dressing device

Abstract

The application relates to a bearing ring raceway grinding wheel and a bearing ring raceway grinding and dressing device, and belongs to the technical field of bearing machining. The bearing ring raceway grinding and dressing device is provided with the bearing ring raceway grinding wheel. The bearing ring raceway grinding wheel comprises a grinding wheel main body. The outer side of the grinding wheel main body is provided with an arc-shaped grinding part capable of grinding the bearing ring raceway in the circumferential direction. The included angle between the end point of one side of the arc-shaped grinding part, the central lowest point of the arc-shaped grinding part and the center point of the circle where the arc-shaped grinding part is located is 45 degrees. The included angle between the end point of the other side of the arc-shaped grinding part, the central lowest point of the arc-shaped grinding part and the center point of the circle where the arc-shaped grinding part is located is 35 degrees. The design can reduce the grinding time and improve the grinding efficiency. During the grinding process of the product, the grinding force Fa borne by the raceway is uniformly distributed, the grinding quality is improved, the dressing time of the grinding wheel is short, the frequency is long, and the production efficiency is improved.

Description

Technical Field

[0001] This application relates to the field of bearing processing technology, and in particular to a grinding wheel for grinding bearing raceways and a bearing raceway grinding and dressing device having the grinding wheel for grinding bearing raceways. Background Technology

[0002] Currently, a dressing device is required during the machining of bearing rings. The choice of dressing device is determined by the structural shape of the product being ground. The product, grinding wheel, and roller are all mounted on the same axial line. This mounting method has the following drawbacks during grinding:

[0003] (1) Short idle stroke, long grinding stroke (the grinding wheel first contacts the groove edge of the product being ground);

[0004] (2) Uneven distribution of cutting force during grinding (the included angle distribution of the groove grinding area is approximately 65° on the left and approximately 13° on the right, such as...) Figure 1 (as shown);

[0005] (3) The grinding wheel dressing time is long and the frequency is short, resulting in low production efficiency. Utility Model Content

[0006] The purpose of this application is to provide a grinding wheel for grinding bearing raceways and a grinding dressing device for grinding bearing raceways that greatly improves grinding efficiency and grinding quality.

[0007] To achieve the above objectives, this utility model provides a grinding wheel for grinding bearing raceway grooves, including a grinding wheel body. The outer side of the grinding wheel body has an arc-shaped grinding portion along its circumference, capable of grinding bearing raceway grooves. The included angle between the endpoint of one side of the arc-shaped grinding portion, the lowest point of the center of the arc-shaped grinding portion, and the center point of the circle containing the arc-shaped grinding portion is 45 degrees. The included angle between the endpoint of the other side of the arc-shaped grinding portion, the lowest point of the center of the arc-shaped grinding portion, and the center point of the circle containing the arc-shaped grinding portion is 35 degrees.

[0008] In a preferred embodiment of the present invention, taking the lowest point of the center of the arc-shaped grinding part as a reference, the arc length between the endpoint of one side of the arc-shaped grinding part forming a 45-degree angle and the lowest point of the center is greater than the arc length between the endpoint of the other side of the arc-shaped grinding part forming a 35-degree angle and the lowest point of the center.

[0009] Furthermore, the height of one end point of the arc-shaped grinding section forming a 45-degree angle is higher than the height of the other end point of the arc-shaped grinding section forming a 35-degree angle.

[0010] To avoid interference between the two ends of the arc-shaped grinding section and the two ends of the bearing raceway, the two ends of the arc-shaped grinding section have a first transition section and a second transition section between them and the end face of the grinding wheel body.

[0011] Furthermore, the first transition portion is an arc-shaped groove structure that is arranged in the opposite direction to the arc-shaped grinding portion, and the second transition portion is an inclined surface structure that is inclined to the horizontal plane.

[0012] This utility model also provides a bearing ring groove grinding and dressing device, wherein the above-mentioned bearing ring groove grinding grinding wheel is installed on the dressing device.

[0013] This grinding wheel and dressing device for grinding bearing raceways deflects the arc-shaped grinding section on the original grinding wheel by 20 degrees. This dresses the grinding wheel into an angled shape during grinding, requiring only the product being processed to be adjusted at one angle. Compared to existing technologies, this design has the following advantages:

[0014] (1) The idle stroke is long and the grinding stroke is short, which reduces grinding time and improves grinding efficiency;

[0015] (2) During the grinding process, the grinding force Fa borne by the groove is evenly distributed, which improves the grinding quality;

[0016] (3) The dressing time of the grinding wheel is short and the frequency is long (it can be adjusted from dressing once for every 1 piece processed to dressing once for every 4-5 pieces processed), which improves production efficiency. Attached Figure Description

[0017] Figure 1 This is a schematic diagram of the original bearing ring groove grinding and dressing device.

[0018] Figure 2 This is a cross-sectional view of the grinding wheel for grinding bearing ring grooves according to this utility model;

[0019] Figure 3 This is a cross-sectional view of the grinding wheel for grinding bearing ring grooves according to this utility model during use;

[0020] Figure 4 This is a schematic diagram of the bearing ring groove grinding and dressing device of this utility model. Detailed Implementation

[0021] The preferred embodiments of the present invention will now be described in detail with reference to the accompanying drawings, so that the advantages and features of the present invention can be more easily understood by those skilled in the art, thereby providing a clearer and more definite definition of the scope of protection of the present invention.

[0022] In the description of this utility model, it should be noted that the terms "upper", "lower", "left", "right", "top", "bottom", "side", "end", 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 utility model 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 utility model.

[0023] Example 1:

[0024] like Figure 2 A grinding wheel for grinding bearing raceway is shown, comprising a grinding wheel body 1. The outer side of the grinding wheel body 1 has an arc-shaped grinding portion 2 along its circumference, which is capable of grinding the bearing raceway. The arc-shaped grinding portion 2 is annular and matches the arc-shaped raceway of the bearing raceway. A first transition portion 5 and a second transition portion 6 are provided between the two ends of the arc-shaped grinding portion 2 and the end face of the grinding wheel body 1.

[0025] by Figure 2 With the direction in the middle as a reference, the left end face 3 and the right end face 4 at both ends of the bottom of the grinding wheel body 1 are parallel to the horizontal plane. The arc-shaped grinding part 2 is slightly close to the left end face 3. The arc-shaped grinding part 2 arches downward, and the arc of the arch matches the bearing ring groove. There is a first transition part 5 between the left end of the arc-shaped grinding part 2 and the left end face 3. The first transition part 5 is an arc-shaped groove structure that is set in the opposite direction to the arc-shaped grinding part 2. There is a second transition part 6 between the right end of the arc-shaped grinding part 2 and the right end face 4. The second transition part 6 is an inclined surface structure that is inclined to the horizontal plane.

[0026] Combination Figure 3 As shown, the lowest point of the center of the arc-shaped grinding section 2 is a, the left endpoint is b, the right endpoint is c, and the center of the circle containing the arc-shaped grinding section 2 is o. L is the center line of the lowest point of the groove when the original bearing ring groove was machined. After the improvement of this utility model, the entire arc-shaped grinding section 2 is based on the center o. Figure 3 Rotate the center direction counterclockwise by 20°;

[0027] Specifically, the angle formed between the left endpoint b of the arc-shaped grinding part 2, the lowest point a of the center of the arc-shaped grinding part 2, and the center point o of the circle containing the arc-shaped grinding part 2 is 45 degrees. The angle formed between the right endpoint c of the arc-shaped grinding part 2, the lowest point a of the center of the arc-shaped grinding part 2, and the center point o of the circle containing the arc-shaped grinding part 2 is 35 degrees. At the same time, taking the lowest point a of the center of the arc-shaped grinding part 2 as a reference, the arc length between the left endpoint b of the arc-shaped grinding part 2 forming the 45-degree angle and the lowest point a of the center is greater than the arc length between the right endpoint c of the arc-shaped grinding part 2 forming the 35-degree angle and the lowest point a of the center, that is, the arc length ba is greater than the arc length ca. The height of the left endpoint b of the arc-shaped grinding part 2 forming the 45-degree angle is higher than the height of the right endpoint c of the arc-shaped grinding part 2 forming the 35-degree angle, that is, the left endpoint b is higher than the right endpoint c.

[0028] Example 2:

[0029] This utility model also provides a bearing ring groove grinding and dressing device, such as Figure 4 As shown, the dressing device 7 is equipped with the aforementioned grinding wheel 8 for grinding bearing ring grooves. During processing, the bearing ring 9 to be processed only needs to be adjusted at an angle, and the grinding wheel 8 can then grind it. During processing, the idle stroke is long and the grinding stroke is short, which can reduce grinding time and improve grinding efficiency. During the grinding process, the grinding force Fa borne by the groove is evenly distributed, which can improve the grinding quality. The dressing time of the grinding wheel is short and the frequency is long (it can be adjusted from dressing once for every 1 piece processed to dressing once for every 4-5 pieces processed), thereby improving production efficiency.

[0030] The above are all preferred embodiments of this application, and are not intended to limit the scope of protection of this application. Therefore, all equivalent changes made in accordance with the structure, shape, principle and application direction of this application should be covered within the scope of protection of this application.

Claims

1. A grinding wheel for grinding a bearing ring raceway, comprising a grinding wheel body having an arc-shaped grinding portion capable of grinding a bearing ring raceway on an outer side thereof in a circumferential direction thereof, characterized in that: The included angle between the end point of one side of the arc-shaped grinding part, the center lowest point of the arc-shaped grinding part and the center point of the circle where the arc-shaped grinding part is located is 45 degrees, and the included angle between the end point of the other side of the arc-shaped grinding part, the center lowest point of the arc-shaped grinding part and the center point of the circle where the arc-shaped grinding part is located is 35 degrees.

2. The bearing raceway grinding wheel of claim 1, wherein: The arc length between the end point of one side of the arc-shaped grinding part and the center lowest point is greater than the arc length between the end point of the other side of the arc-shaped grinding part and the center lowest point, with the center lowest point of the arc-shaped grinding part as a reference.

3. The bearing raceway grinding wheel of claim 2, wherein: The end point height of one side of the arc-shaped grinding part forming the 45-degree included angle is higher than the end point height of the other side of the arc-shaped grinding part forming the 35-degree included angle.

4. The bearing raceway grinding wheel of claim 1, wherein: The two ends of the arc-shaped grinding part and the end face of the grinding wheel body have a first transition part and a second transition part.

5. The bearing raceway grinding wheel of claim 4, wherein: The first transition part is an arc-shaped groove structure arranged reversely to the arc-shaped grinding part, and the second transition part is a slope structure inclined to the horizontal plane.

6. A bearing ring raceway grinding and finishing apparatus characterized by: The dressing device is provided with the grinding wheel for grinding the bearing ring groove according to any one of claims 1-5.

Images