CN112936015A - Grinding method for improving ovality of outer raceway of tapered roller bearing - Google Patents
Grinding method for improving ovality of outer raceway of tapered roller bearing Download PDFInfo
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- CN112936015A CN112936015A CN202110338158.XA CN202110338158A CN112936015A CN 112936015 A CN112936015 A CN 112936015A CN 202110338158 A CN202110338158 A CN 202110338158A CN 112936015 A CN112936015 A CN 112936015A
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- bearing
- bearing rings
- fulcrum
- grinding
- outer raceway
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B24—GRINDING; POLISHING
- B24B—MACHINES, DEVICES, OR PROCESSES FOR GRINDING OR POLISHING; DRESSING OR CONDITIONING OF ABRADING SURFACES; FEEDING OF GRINDING, POLISHING, OR LAPPING AGENTS
- B24B19/00—Single-purpose machines or devices for particular grinding operations not covered by any other main group
- B24B19/02—Single-purpose machines or devices for particular grinding operations not covered by any other main group for grinding grooves, e.g. on shafts, in casings, in tubes, homokinetic joint elements
- B24B19/06—Single-purpose machines or devices for particular grinding operations not covered by any other main group for grinding grooves, e.g. on shafts, in casings, in tubes, homokinetic joint elements for grinding races, e.g. roller races
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B24—GRINDING; POLISHING
- B24B—MACHINES, DEVICES, OR PROCESSES FOR GRINDING OR POLISHING; DRESSING OR CONDITIONING OF ABRADING SURFACES; FEEDING OF GRINDING, POLISHING, OR LAPPING AGENTS
- B24B41/00—Component parts such as frames, beds, carriages, headstocks
- B24B41/06—Work supports, e.g. adjustable steadies
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Grinding Of Cylindrical And Plane Surfaces (AREA)
Abstract
The invention relates to a grinding method of an outer raceway of a bearing ring, in particular to a grinding method for improving the ovality of the outer raceway of a tapered roller bearing, wherein the outer raceways of two bearing rings are ground simultaneously by fixing a grinding wheel on a grinding wheel shaft, and the two bearing rings are kept in staggered arrangement; the two bearing rings are maintained to be arranged in a staggered mode through supporting points arranged outside the two bearing rings respectively, the specifications of the two bearing rings are the same, and the two bearing rings are maintained to be arranged in a staggered mode through adjusting the positions of the supporting points. According to the grinding method, two bearing ring outer raceways are simultaneously machined by using one grinding wheel, the total machining time is reduced by 30% compared with the total time for separately machining two outer raceways, and the machining efficiency can be improved by 30%; meanwhile, the grinding method has a certain limiting effect on the grinding wheel, and can well improve the deformation of the raceway.
Description
Technical Field
The invention relates to a grinding method of an outer raceway of a bearing ring, in particular to a grinding method for improving the ovality of the outer raceway of a tapered roller bearing, and belongs to the technical field of grinding processing of bearing rings.
Background
In the existing bearing ring raceway grinding process, an electromagnetic centerless fixture is generally adopted for clamping, a bearing internal grinder is used for grinding, the electromagnetic centerless fixture is used for tightly sucking the end face of a workpiece on the end face of a magnetic pole by using the suction force generated by a direct current electromagnetic coil after the workpiece is positioned on a front support and a rear support in the electromagnetic centerless fixture by using the ground outer surface and one end face, and the workpiece and a workpiece shaft (magnetic pole) have a certain eccentric amount e. When the magnetic pole rotates around the axis, the magnetic pole forces the workpiece to rotate around the center of the magnetic pole, and the magnetic pole and the workpiece have an eccentric center, so that relative sliding is generated between the magnetic pole and the workpiece to force the workpiece to cling to the front and rear supports and rotate, and the workpiece obtains stable rotating motion. The grinding method is to clamp and grind a product at one time, and the grinding wheel shaft is parallel to the ferrule raceway bus during processing. During detection after processing, the bearing ring is positioned by adopting an electromagnetic centerless clamp through magnetic attraction because the ellipse of the outer raceway of the bearing ring is larger after heat treatment, and the bearing ring is easy to profile grind when the feed amount of a grinding wheel is large because of no centering, so that the deformation effect of improving the outer raceway of the tapered roller bearing ring is not good, and the product quality is influenced.
Disclosure of Invention
In view of the above technical problems, the present invention aims to provide a grinding method for improving the ovality of the outer raceway of the tapered roller bearing, which can improve the deformation of the raceway by grinding two products by clamping at one time.
In order to achieve the purpose, the invention adopts the technical scheme that: a grinding method for improving the ovality of an outer raceway of a tapered roller bearing comprises the steps of fixing a grinding wheel on a grinding wheel shaft and grinding the outer raceways of two bearing rings at the same time, wherein the two bearing rings are arranged in a staggered manner;
the dislocation arrangement of the two bearing rings is based on the outer diameter of the ring, and the outer surface of the ring is processed to reach the standard before the outer raceway of the ring is ground.
Furthermore, the two bearing rings are maintained to be arranged in a staggered mode through supporting points respectively arranged outside the two bearing rings, the specifications of the two bearing rings are the same, and the two bearing rings are maintained to be arranged in a staggered mode through adjusting the positions of the supporting points.
Furthermore, the number of the fulcrums arranged outside the two bearing rings is 4, wherein 2 fulcrums are arranged in the direction for keeping the two bearing rings in dislocation and are a first fulcrum and a second fulcrum; the other two fulcrums are arranged outside the ferrule vertical to the dislocation direction and are a third fulcrum and a fourth fulcrum; that is, the angle between the connecting lines of the two fulcrums on each ferrule to the center point of the ferrule is 90 degrees.
The third fulcrum and the fourth fulcrum respectively support the two ferrules, and the first fulcrum and the third fulcrum are arranged in a staggered mode; the bearing ring is supported by the third fulcrum and the fourth fulcrum in the 4 fulcrums, and the first fulcrum and the third fulcrum limit the bearing ring, so that the bearing ring is prevented from deviating in the rotating process.
Furthermore, the width of the grinding wheel is larger than that of one of the bearing rings.
Further, the grinding wheel carries out reciprocating grinding in the two bearing rings which are arranged in a staggered mode, and the distance of reciprocating grinding travel of the grinding wheel is larger than the sum of the widths of the raceways of the two bearing rings.
Furthermore, in the two bearing rings arranged in a staggered mode, the small end face of one bearing ring is in contact with the large end face of the other bearing ring.
Furthermore, the end faces of the two bearing rings are mutually adsorbed and close together through electromagnetic conduction.
Furthermore, the two bearing rings are clamped through an electromagnetic centerless clamp.
Based on the technical scheme, the bearing ring outer raceway is in an oval shape before grinding, the oval is large, the bearing ring outer raceway needs to be continuously trimmed to a perfect circle through grinding, a point on the oval outer raceway farthest from the center of the oval is a long point, the distance from the long point to the center of the oval is a long semi-axis, a point on the oval outer raceway closest to the center of the oval is a short point, and the distance from the short point to the center of the oval is a short semi-axis.
Generally, most bearing ring outer raceways have two short points and two long points, with the distance from the center of the ellipse at each other point being non-uniform and continuously varying. Because the ellipses of the outer raceways of any two bearing rings are different, when the grinding wheel grinds in two bearing rings with different heights at the same time, the raceways of the two bearing rings are not completely overlapped, a relative longer point and a relative shorter point are inevitably existed, and the grinding wheel can only contact with the raceway of one bearing ring in the two bearing rings; when the grinding wheel performs tool setting and grinding, the grinding wheel traverses two bearing ring raceways to perform reciprocating motion; when only one bearing ring with a relatively short point is ground, the grinding wheel performs a grinding function, the raceway of the other bearing ring cannot be in contact with the grinding wheel, and the grinding wheel part at the position idles, so that the limiting function on the grinding wheel is achieved, the elliptical deformation can be well improved, and the copying grinding is avoided.
Because the relative longer points and the relative shorter points of the two bearing rings are distributed in a staggered manner, when the bearing rings rotate under the action of the magnetic pole of the electromagnetic centerless die, the bearing rings for grinding are continuously changed, but the bearing ring with the relative shorter point in the two bearing rings and the grinding wheel are in a grinding state, so that the grinding wheel and the bearing rings are always in a mutually supporting state, the generation of uneven stress is avoided, and a certain protection effect on the grinding wheel shaft can be realized.
Preferably, the long half shaft of the outer raceway of one bearing ring and the short half shaft of the outer raceway of the other bearing ring are arranged in parallel with each other in space, and at the limit position, the position difference between the grinding surfaces of the two bearing rings is the largest, and the grinding effect is the best.
When the specification of the bearing ring is changed, different supporting points can be replaced to adjust the dislocation relation of the bearing ring.
When the bearing rings are ground, the end surfaces of the two bearing rings are mutually adsorbed and leaned together through the electromagnetic conduction action, the bearing ring on one side is clamped through an electromagnetic centerless clamp, the head of a grinding machine is pulled for a certain angle to enable the two bearing rings to be obliquely and misplaced, and a grinding wheel shaft is placed in the two bearing rings and is positioned between 2 pivots of each bearing ring; because the head of a bed stirs a certain angle, the grinding wheel spindle and the extension line of the center of the electromagnetic centerless fixture form a certain angle, namely, the bearing ring is obliquely placed, and the grinding wheel spindle is in linear feeding motion.
The invention has the beneficial effects that: according to the grinding method, two bearing ring outer raceways are simultaneously machined by using one grinding wheel, the total machining time is reduced by 30% compared with the total time for separately machining two outer raceways, and the machining efficiency can be improved by 30%; meanwhile, the grinding method has a certain limiting effect on the grinding wheel, and can well improve the deformation of the raceway.
Drawings
Fig. 1 is a view showing a state of machining a grinding surface of a bearing ring according to the present invention.
Fig. 2 is a view showing the clamping of the bearing ring of the present invention.
In the figure, 1, a first bearing ring major axis, 2, a second bearing ring minor axis, 3, a fulcrum in a dislocation direction, 4 and a grinding wheel.
Detailed Description
In order to make the structure and function of the present invention clearer, the technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the drawings in the embodiments of the present invention.
Referring to the attached figure 1, the grinding method for improving the ovality of the outer raceway of the tapered roller bearing is characterized in that the outer raceways of two bearing rings are ground simultaneously by fixing a grinding wheel on a grinding wheel shaft, and the two bearing rings are arranged in a staggered mode;
the dislocation arrangement of the two bearing rings is based on the outer diameter of the ring, and the outer surface of the ring is processed to reach the standard before the outer raceway of the ring is ground.
Furthermore, the two bearing rings are maintained to be arranged in a staggered mode through supporting points respectively arranged outside the two bearing rings, the specifications of the two bearing rings are the same, and the two bearing rings are maintained to be arranged in a staggered mode through adjusting the positions of the supporting points.
Furthermore, the number of the fulcrums arranged outside the two bearing rings is 4, wherein 2 fulcrums are arranged in the direction for keeping the two bearing rings in dislocation and are a first fulcrum and a second fulcrum; the other two fulcrums are arranged outside the ferrule vertical to the dislocation direction and are a third fulcrum and a fourth fulcrum; that is, the angle between the connecting lines of the two fulcrums on each ferrule to the center point of the ferrule is 90 degrees.
The third fulcrum and the fourth fulcrum respectively support the two ferrules, and the first fulcrum and the third fulcrum are arranged in a staggered mode; the bearing ring is supported by the third fulcrum and the fourth fulcrum in the 4 fulcrums, and the first fulcrum and the third fulcrum limit the bearing ring, so that the bearing ring is prevented from deviating in the rotating process.
Furthermore, the width of the grinding wheel is larger than that of one of the bearing rings.
Further, the grinding wheel carries out reciprocating grinding in the two bearing rings which are arranged in a staggered mode, and the distance of reciprocating grinding travel of the grinding wheel is larger than the sum of the widths of the raceways of the two bearing rings.
Furthermore, in the two bearing rings arranged in a staggered mode, the small end face of one bearing ring is in contact with the large end face of the other bearing ring.
Furthermore, the end faces of the two bearing rings are mutually adsorbed and close together through electromagnetic conduction.
Furthermore, the two bearing rings are clamped through an electromagnetic centerless clamp.
The outer raceway of the bearing ring is in an elliptical shape before grinding, the ellipse is large, the outer raceway needs to be continuously trimmed to a perfect circle through grinding, a point on the elliptical outer raceway, which is farthest from the center of the ellipse, is a long point, the distance from the long point to the center of the ellipse is a long semi-axis, a point on the elliptical outer raceway, which is closest to the center of the ellipse, is a short point, and the distance from the short point to the center of the ellipse is a short semi-axis.
Generally, most bearing ring outer raceways have two short points and two long points, with the distance from the center of the ellipse at each other point being non-uniform and continuously varying. Because the ellipses of the outer raceways of any two bearing rings are different, when the grinding wheel grinds in two bearing rings with different heights at the same time, the raceways of the two bearing rings are not completely overlapped, a relative longer point and a relative shorter point are inevitably existed, and the grinding wheel can only contact with the raceway of one bearing ring in the two bearing rings; when the grinding wheel performs tool setting and grinding, the grinding wheel traverses two bearing ring raceways to perform reciprocating motion; when only one bearing ring with a relatively short point is ground, the grinding wheel performs a grinding function, the raceway of the other bearing ring cannot be in contact with the grinding wheel, and the grinding wheel part at the position idles, so that the limiting function on the grinding wheel is achieved, the elliptical deformation can be well improved, and the copying grinding is avoided.
Because the relative longer points and the relative shorter points of the two bearing rings are distributed in a staggered manner, when the bearing rings rotate under the action of the magnetic pole of the electromagnetic centerless die, the bearing rings for grinding are continuously changed, but the bearing ring with the relative shorter point in the two bearing rings and the grinding wheel are in a grinding state, so that the grinding wheel and the bearing rings are always in a mutually supporting state, the generation of uneven stress is avoided, and a certain protection effect on the grinding wheel shaft can be realized.
As shown in fig. 2, when the long half shaft of the outer raceway of one bearing ring and the short half shaft of the outer raceway of the other bearing ring are arranged in parallel with each other in space, which is the limit position, the difference between the positions of the grinding surfaces of the two bearing rings is the largest, and the grinding effect is the best.
When the specification of the bearing ring is changed, different supporting points can be replaced to adjust the dislocation relation of the bearing ring.
The clamping method is suitable for the bearing internal grinding machine M250A, two products can be clamped and ground at one time by clamping through the electromagnetic centerless clamp, and two tapered roller bearing outer raceways can be machined and ground simultaneously.
For two products of the tapered roller bearing outer ring, the small end face of one product and the large end face of the other product are close to each other through the electromagnetic conduction action. Two products are simultaneously supported by using two supporting points, and the positions of the supporting points are adjusted to enable the contact points of the roller paths and the grinding wheel to be on the same straight line. And (3) processing by using a grinding wheel, wherein the width of the selected grinding wheel is wider than the width of one product, reciprocating grinding is adopted during processing, and the reciprocating travel distance of the grinding wheel is wider than the sum of the widths of the two ferrule roller paths. By adopting the processing method, as the diameter long points and the short points of the two ferrule roller paths are distributed in a staggered way, the grinding wheel grinds four short points firstly during processing, so that the grinding wheel has a certain limiting effect, and the deformation of the roller paths can be improved well.
The two products are processed simultaneously, only the time for replacing the fulcrum and the grinding wheel is increased when the products are replaced, compared with the total time for processing the outer raceways of the two products independently, the processing time of the processing method is reduced by 30%, and the processing efficiency can be improved by 30%.
After verification for many times, products with the width less than 70mm and the outer diameter less than 310mm (the size considers the distance between the end face of the grinding wheel and the end face of the product) are ground by one-time clamping.
The above list is only the preferred embodiment of the present invention. It is obvious that the invention is not limited to the above embodiments, but that many variations are possible. All modifications which can be derived or suggested by a person skilled in the art from the disclosure of the present invention are to be considered within the scope of the invention.
Claims (10)
1. The grinding method for improving the ovality of the outer raceway of the tapered roller bearing is characterized by comprising the following steps of: the outer raceways of the two bearing rings are ground simultaneously by fixing a grinding wheel on the grinding wheel shaft, and the two bearing rings are arranged in a staggered manner.
2. A grinding method for improving ovality of an outer raceway of a tapered roller bearing according to claim 1, characterized in that: the two bearing rings are maintained to be arranged in a staggered mode through supporting points arranged outside the two bearing rings respectively, the specifications of the two bearing rings are the same, and the two bearing rings are maintained to be arranged in a staggered mode through adjusting the positions of the supporting points.
3. A grinding method for improving ovality of an outer raceway of a tapered roller bearing according to claim 2, characterized in that: the number of the fulcrums arranged outside the two bearing rings is 4, wherein the 2 fulcrums are arranged in the direction for keeping the two bearing rings to be staggered and are a first fulcrum and a second fulcrum; the other two fulcrums are arranged outside the ferrule vertical to the dislocation direction and are a third fulcrum and a fourth fulcrum; that is, the angle between the connecting lines of the two fulcrums on each ferrule to the center point of the ferrule is 90 degrees.
4. A grinding method for improving ovality of an outer raceway of a tapered roller bearing according to claim 3, characterized in that: the third fulcrum and the fourth fulcrum respectively support the two ferrules, and the first fulcrum and the third fulcrum are arranged in a staggered mode; the bearing ring is supported by the third fulcrum and the fourth fulcrum in the 4 fulcrums, and the first fulcrum and the third fulcrum limit the bearing ring, so that the bearing ring is prevented from deviating in the rotating process.
5. A grinding method for improving ovality of an outer raceway of a tapered roller bearing according to claim 1, characterized in that: the width of the grinding wheel is larger than that of one of the bearing rings.
6. A grinding method for improving ovality of an outer raceway of a tapered roller bearing according to claim 1, characterized in that: the grinding wheel carries out reciprocating grinding in the two bearing rings which are arranged in a staggered mode, and the distance of the reciprocating grinding travel of the grinding wheel is larger than the sum of the widths of the raceways of the two bearing rings.
7. A grinding method for improving ovality of an outer raceway of a tapered roller bearing according to claim 1, characterized in that: in the two bearing rings arranged in a staggered mode, the small end face of one bearing ring is in contact with the large end face of the other bearing ring.
8. A grinding method for improving the ovality of an outer raceway of a tapered roller bearing according to claim 7, characterized in that: the end faces of the two bearing rings are mutually adsorbed and close together through the electromagnetic conduction action.
9. A grinding method for improving ovality of an outer raceway of a tapered roller bearing according to claim 1, characterized in that: the two bearing rings are clamped through an electromagnetic centerless clamp.
10. A grinding method for improving ovality of an outer raceway of a tapered roller bearing according to claim 1, characterized in that: the long half shaft of the outer raceway of one bearing ring and the short half shaft of the outer raceway of the other bearing ring are arranged in parallel in space.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110338158.XA CN112936015B (en) | 2021-03-30 | 2021-03-30 | Grinding method for improving ovality of outer raceway of tapered roller bearing |
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| CN202110338158.XA CN112936015B (en) | 2021-03-30 | 2021-03-30 | Grinding method for improving ovality of outer raceway of tapered roller bearing |
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| CN112936015A true CN112936015A (en) | 2021-06-11 |
| CN112936015B CN112936015B (en) | 2023-09-19 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN202110338158.XA Active CN112936015B (en) | 2021-03-30 | 2021-03-30 | Grinding method for improving ovality of outer raceway of tapered roller bearing |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113415310A (en) * | 2021-07-09 | 2021-09-21 | 攀钢集团西昌钢钒有限公司 | Wheel adjusting method and system |
Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3158965A (en) * | 1959-11-25 | 1964-12-01 | Heald Machine Co | Apparatus for grinding |
| SU468763A1 (en) * | 1967-10-24 | 1975-04-30 | Феб Лейнцигер Кугельлагерфабрик Дкф (Инопредприятие) | Device for positioning products for centerless grinding |
| JPS597553A (en) * | 1982-06-29 | 1984-01-14 | Nippon Seiko Kk | Method for grinding and shaping elliptic ring having uniform thickness |
| DD247166A1 (en) * | 1986-03-13 | 1987-07-01 | Werkzeugmasch Okt Veb | DEVICE FOR GRINDING ELIPTIC INTERIOR AND EXTERIOR CONTOURS |
| DE4237223A1 (en) * | 1992-11-04 | 1994-05-05 | Skf Gmbh | Machining races for radial roller bearing - with outer race clamped and machined successively in orthogonal axes to provide offset ovality for inner and outer surfaces. |
| CN2650936Y (en) * | 2003-07-10 | 2004-10-27 | 瓦房店轴承集团有限责任公司 | Apparatus for grinding two bearing rings simultaneously |
| JP2012187648A (en) * | 2011-03-09 | 2012-10-04 | Ntn Corp | Method for grinding inner surface of workpiece |
-
2021
- 2021-03-30 CN CN202110338158.XA patent/CN112936015B/en active Active
Patent Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3158965A (en) * | 1959-11-25 | 1964-12-01 | Heald Machine Co | Apparatus for grinding |
| SU468763A1 (en) * | 1967-10-24 | 1975-04-30 | Феб Лейнцигер Кугельлагерфабрик Дкф (Инопредприятие) | Device for positioning products for centerless grinding |
| JPS597553A (en) * | 1982-06-29 | 1984-01-14 | Nippon Seiko Kk | Method for grinding and shaping elliptic ring having uniform thickness |
| DD247166A1 (en) * | 1986-03-13 | 1987-07-01 | Werkzeugmasch Okt Veb | DEVICE FOR GRINDING ELIPTIC INTERIOR AND EXTERIOR CONTOURS |
| FR2595605A1 (en) * | 1986-03-13 | 1987-09-18 | Werkzeugmasch Okt Veb | DEVICE FOR GRINDING ELLIPTICAL INTERIOR AND EXTERNAL CONTOURS ON PARTS IN THE FORM OF REVOLUTION SOLIDS |
| DE4237223A1 (en) * | 1992-11-04 | 1994-05-05 | Skf Gmbh | Machining races for radial roller bearing - with outer race clamped and machined successively in orthogonal axes to provide offset ovality for inner and outer surfaces. |
| CN2650936Y (en) * | 2003-07-10 | 2004-10-27 | 瓦房店轴承集团有限责任公司 | Apparatus for grinding two bearing rings simultaneously |
| JP2012187648A (en) * | 2011-03-09 | 2012-10-04 | Ntn Corp | Method for grinding inner surface of workpiece |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113415310A (en) * | 2021-07-09 | 2021-09-21 | 攀钢集团西昌钢钒有限公司 | Wheel adjusting method and system |
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| CN112936015B (en) | 2023-09-19 |
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