CN112936015B - 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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- CN112936015B CN112936015B CN202110338158.XA CN202110338158A CN112936015B CN 112936015 B CN112936015 B CN 112936015B CN 202110338158 A CN202110338158 A CN 202110338158A CN 112936015 B CN112936015 B CN 112936015B
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- bearing
- bearing rings
- grinding wheel
- grinding
- fulcrum
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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 ovality of the outer raceway of a tapered roller bearing, wherein a grinding wheel is fixed on a grinding wheel shaft to grind the outer raceways of two bearing rings simultaneously, and the two bearing rings are arranged in a staggered manner; the two bearing rings are kept in dislocation through the fulcrums respectively arranged outside the two bearing rings, the specifications of the two bearing rings are the same, and the two bearing rings are kept in dislocation through adjusting the positions of the fulcrums. According to the grinding method, a piece of grinding wheel is used for simultaneously processing two outer raceways of the bearing ring, the processing time is reduced by 30% compared with the total time for separately processing the outer raceways of two products, and the processing efficiency can be improved by 30%; meanwhile, the grinding method has a certain limiting effect on the grinding wheel, and the deformation of the roller path can be well improved.
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 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 conventional bearing ring raceway grinding processing, an electromagnetic centerless clamp is generally adopted for clamping, a bearing internal grinder is used for grinding, the electromagnetic centerless clamp is used for tightly sucking the end face of a workpiece on the end face of a magnetic pole by utilizing the suction force generated by a direct current electromagnetic coil after the workpiece is positioned on the front and rear supports in the electromagnetic centerless clamp by the ground outer surface and one end face, and the workpiece and a workpiece shaft (the magnetic pole) have a certain eccentric value e. When the magnetic pole rotates around its axle center, the magnetic pole forces the workpiece to rotate around its center, and the relative sliding between the magnetic pole and the workpiece forces the workpiece to cling to the front and back supports and rotate, so that the workpiece obtains stable rotation. The grinding method is to grind one product in one clamping, and the grinding wheel shaft is parallel to the ring raceway bus during processing. After processing, detection shows that the bearing ring adopts an electromagnetic coreless clamp to position through magnetic attraction due to larger ellipse of the outer raceway of the bearing ring after heat treatment, and the bearing ring is easy to profile grinding due to the misalignment and large grinding wheel feeding amount, so that the deformation effect of 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 technical problems, the invention aims to provide a grinding method for improving the ovality of the outer raceway of the tapered roller bearing, and the raceway deformation can be well improved by grinding two products through clamping at one time.
In order to achieve the above purpose, the technical scheme adopted by the invention is as follows: according to the grinding method for improving the ovality of the outer roller path of the tapered roller bearing, a grinding wheel is fixed on a grinding wheel shaft, and the outer roller paths of two bearing rings are simultaneously ground, so that the two bearing rings are kept in staggered arrangement;
the dislocation of the two bearing rings is based on the outer diameter of the rings, and the outer surface of the rings is processed to reach the standard before the outer roller path grinding of the rings is carried out.
Furthermore, the two bearing rings are kept in dislocation through the fulcrums respectively arranged outside the two bearing rings, the specifications of the two bearing rings are the same, and the two bearing rings are kept in dislocation through adjusting the positions of the fulcrums.
Further, the number of the supporting points arranged outside the two bearing rings is 4, wherein 2 supporting points are arranged in the direction for keeping the dislocation of the two bearing rings, and the two supporting points are a first supporting point and a second supporting point; the other two fulcrums are arranged outside the ferrule perpendicular to the dislocation direction and are a third fulcrum and a fourth fulcrum; that is, the included angle between the two fulcrums on each ferrule and the connection line between the two fulcrums and the central point of the ferrule is 90 degrees.
The third fulcrum and the fourth fulcrum respectively support two ferrules, and the first fulcrum and the third fulcrum are arranged in a staggered manner; 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 play a limiting role on the bearing ring to prevent the bearing ring from deviating in the rotating process.
Further, the width of the grinding wheel is larger than the width of one of the bearing rings.
Furthermore, 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 two bearing ring raceways.
Further, in the two bearing rings which are arranged in a staggered manner, the small end face of one bearing ring is contacted with the large end face of the other bearing ring.
Further, the end surfaces of the two bearing rings are mutually adsorbed and lean against each other through electromagnetic conduction.
Furthermore, the two bearing rings are clamped by an electromagnetic centerless clamp.
Based on the technical scheme, the outer raceway of the bearing ring is in an elliptic shape and is larger in ellipse before grinding, the outer raceway needs to be continuously trimmed to a perfect circle through grinding, the point, farthest from the center of the ellipse, on the outer raceway of the ellipse is a long point, the distance from the long point to the center of the ellipse is a long half axis, the point, closest to the center of the ellipse, on the outer raceway of the ellipse is a short point, and the distance from the short point to the center of the ellipse is a short half axis.
In general, most bearing ring outer raceways have two short points and two long points, and the distance from the centre of the ellipse at the other points is non-uniform and continuously variable. Because the ellipses of the outer raceways of any two bearing rings are different, when the grinding wheel grinds in the two bearing rings with different heights at the same time, the raceways of the two bearing rings cannot be completely overlapped, and relatively longer points and shorter points are necessarily existed, and the grinding wheel can only contact with one bearing ring raceway in the two bearing rings; when the grinding wheel is used for tool setting grinding, the grinding wheel traverses the two bearing ring raceways to carry out reciprocating travel; when only one bearing ring with a relatively short point is ground, the grinding wheel performs a grinding function, the roller path of the other bearing ring cannot be contacted with the grinding wheel, and the part of the grinding wheel at the position idles, so that the limiting function on the grinding wheel is achieved, elliptical deformation can be well improved, and profile grinding is avoided.
Because the longer points and the shorter points of the two bearing rings are distributed in a staggered way, when the bearing rings rotate under the action of the magnetic poles of the electromagnetic coreless die, the bearing rings for grinding are continuously changed, but the bearing ring with the relatively 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, uneven stress is avoided, and a certain protection effect on the grinding wheel shaft is also realized.
Preferably, the long half shaft of the outer race of one bearing ring and the short half shaft of the outer race of the other bearing ring are arranged in parallel in space, and are the limit positions, the positions of the grinding surfaces of the two bearing rings are the most different, and the grinding effect is the best.
When the specification of the bearing ring is changed, different fulcrums 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 lean against each other through electromagnetic conduction, the bearing rings on one side are clamped through an electromagnetic centerless clamp, the two bearing rings are obliquely arranged in a staggered mode by shifting a certain angle through the head of a grinder, and a grinding wheel shaft is arranged in the two bearing rings and positioned between 2 supporting points of each bearing ring; because the head of a bed is stirred a certain angle, the center extension line of the grinding wheel shaft and the electromagnetic centerless clamp forms a certain angle, namely, the bearing ring is obliquely arranged, and the grinding wheel shaft moves in a linear feeding way.
The beneficial effects of the invention are as follows: according to the grinding method, a piece of grinding wheel is used for simultaneously processing two outer raceways of the bearing ring, the processing time is reduced by 30% compared with the total time for separately processing the outer raceways of two products, and the processing efficiency can be improved by 30%; meanwhile, the grinding method has a certain limiting effect on the grinding wheel, and the deformation of the roller path can be well improved.
Drawings
Fig. 1 is a view showing a state of processing a bearing ring grinding surface according to the present invention.
Fig. 2 is a view of a bearing ring clamping according to the invention.
In the figure, 1, a first bearing ring long half shaft, 2, a second bearing ring short half shaft, 3, a dislocation direction fulcrum, 4 and a grinding wheel.
Detailed Description
In order to make the structure and function of the present invention clearer, the technical solution in the embodiment of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiment of the present invention.
Referring to fig. 1, a grinding method for improving ovality of an outer raceway of a tapered roller bearing is implemented by fixing a grinding wheel on a grinding wheel shaft and grinding the outer raceways of two bearing rings simultaneously, wherein the two bearing rings are arranged in a staggered manner;
the dislocation of the two bearing rings is based on the outer diameter of the rings, and the outer surface of the rings is processed to reach the standard before the outer roller path grinding of the rings is carried out.
Furthermore, the two bearing rings are kept in dislocation through the fulcrums respectively arranged outside the two bearing rings, the specifications of the two bearing rings are the same, and the two bearing rings are kept in dislocation through adjusting the positions of the fulcrums.
Further, the number of the supporting points arranged outside the two bearing rings is 4, wherein 2 supporting points are arranged in the direction for keeping the dislocation of the two bearing rings, and the two supporting points are a first supporting point and a second supporting point; the other two fulcrums are arranged outside the ferrule perpendicular to the dislocation direction and are a third fulcrum and a fourth fulcrum; that is, the included angle between the two fulcrums on each ferrule and the connection line between the two fulcrums and the central point of the ferrule is 90 degrees.
The third fulcrum and the fourth fulcrum respectively support two ferrules, and the first fulcrum and the third fulcrum are arranged in a staggered manner; 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 play a limiting role on the bearing ring to prevent the bearing ring from deviating in the rotating process.
Further, the width of the grinding wheel is larger than the width of one of the bearing rings.
Furthermore, 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 two bearing ring raceways.
Further, in the two bearing rings which are arranged in a staggered manner, the small end face of one bearing ring is contacted with the large end face of the other bearing ring.
Further, the end surfaces of the two bearing rings are mutually adsorbed and lean against each other through electromagnetic conduction.
Furthermore, the two bearing rings are clamped by an electromagnetic centerless clamp.
The bearing ring outer raceway is in an elliptic shape and is larger in ellipse before grinding, the bearing ring outer raceway needs to be continuously trimmed to a perfect circle through grinding, the point, farthest from the center of the ellipse, on the elliptic outer raceway is a long point, the distance from the long point to the center of the ellipse is a long half shaft, the point, closest to the center of the ellipse, on the elliptic outer raceway is a short point, and the distance from the short point to the center of the ellipse is a short half shaft.
In general, most bearing ring outer raceways have two short points and two long points, and the distance from the centre of the ellipse at the other points is non-uniform and continuously variable. Because the ellipses of the outer raceways of any two bearing rings are different, when the grinding wheel grinds in the two bearing rings with different heights at the same time, the raceways of the two bearing rings cannot be completely overlapped, and relatively longer points and shorter points are necessarily existed, and the grinding wheel can only contact with one bearing ring raceway in the two bearing rings; when the grinding wheel is used for tool setting grinding, the grinding wheel traverses the two bearing ring raceways to carry out reciprocating travel; when only one bearing ring with a relatively short point is ground, the grinding wheel performs a grinding function, the roller path of the other bearing ring cannot be contacted with the grinding wheel, and the part of the grinding wheel at the position idles, so that the limiting function on the grinding wheel is achieved, elliptical deformation can be well improved, and profile grinding is avoided.
Because the longer points and the shorter points of the two bearing rings are distributed in a staggered way, when the bearing rings rotate under the action of the magnetic poles of the electromagnetic coreless die, the bearing rings for grinding are continuously changed, but the bearing ring with the relatively 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, uneven stress is avoided, and a certain protection effect on the grinding wheel shaft is also realized.
As shown in fig. 2, when the long half shaft of the outer race of one bearing ring and the short half shaft of the outer race of the other bearing ring are spatially arranged in parallel with each other, the positions of the grinding surfaces of the two bearing rings are the most different from each other at the limit position, and the grinding effect is the best.
When the specification of the bearing ring is changed, different fulcrums 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 an electromagnetic centerless clamp, and the outer raceways of the two tapered roller bearings can be machined and ground at the same time.
And the two products of the tapered roller bearing outer ring are close to the small end face of one product and the large end face of the other product through electromagnetic conduction. Two supporting points are used for supporting two products simultaneously, and the positions of the supporting points are adjusted so that the contact points of the roller path and the grinding wheel are on the same straight line. A piece of grinding wheel is used for processing, the selected width of the grinding wheel is wider than one product width, reciprocating grinding is adopted during processing, and the reciprocating travel distance of the grinding wheel is wider than the sum of the widths of two ring raceways. By adopting the processing method, as the long points and the short points of the diameters of the two ring rollaway nest are distributed in a staggered way, the grinding wheel grinds the four short points during processing, has a certain limiting effect on the grinding wheel, and can well improve the rollaway nest deformation.
The two products are processed simultaneously, only the time for replacing the supporting point and the grinding wheel is increased during replacement, and the processing time of the processing method is reduced by 30% compared with the total time for independently processing the outer roller paths of the two products, so that the processing efficiency can be improved by 30%.
Through multiple times of verification, products with the width less than 70mm and the outer diameter less than 310mm (the dimension considers the distance between the end face of the grinding wheel and the end face of the product) are subjected to clamping and grinding for one time.
The foregoing list is only the preferred embodiments of the present invention. Obviously, the invention is not limited to the above embodiments, but many variations are possible. All modifications directly derived or suggested to one skilled in the art from the present disclosure should be considered as being within the scope of the present invention.
Claims (5)
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: a grinding wheel is fixed on the grinding wheel shaft, and the outer rollaway nest of the two bearing rings is ground simultaneously, so that the two bearing rings are arranged in a staggered manner; the two bearing rings are kept in dislocation through fulcrums respectively arranged outside the two bearing rings, the two bearing rings have the same specification, and the two bearing rings are kept in dislocation through adjusting the positions of the fulcrums; the number of the fulcrums arranged outside the two bearing rings is 4, wherein 2 fulcrums are arranged in the direction for keeping the dislocation of the two bearing rings, and are a first fulcrum and a second fulcrum; the other two fulcrums are arranged outside the ferrule perpendicular to the dislocation direction and are a third fulcrum and a fourth fulcrum; namely, the included angle between the connecting lines from the two fulcrums on each ferrule to the central point of the ferrule is 90 degrees; the third fulcrum and the fourth fulcrum respectively support two ferrules, and the first fulcrum and the third fulcrum are arranged in a staggered manner; 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 play a limiting role on the bearing ring; the width of the grinding wheel is larger than that of one of the bearing rings; the grinding wheel carries out reciprocating grinding in the two bearing rings which are arranged in a staggered mode, and the reciprocating grinding travelling distance of the grinding wheel is larger than the sum of the widths of the two bearing ring raceways; the point on the oval outer raceway which is 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 half axis, the point on the oval outer raceway which is 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 half axis; when the grinding wheel grinds in two bearing rings with different heights at the same time, the rollaway nest of the two bearing rings cannot be completely overlapped, and relatively longer points and shorter points are necessarily existed, and the grinding wheel can only contact with one bearing ring rollaway nest in the two bearing rings; when the grinding wheel is used for tool setting grinding, the grinding wheel traverses the two bearing ring raceways to carry out reciprocating travel; only one bearing ring with a relatively short point is ground, the grinding wheel is ground, and the raceway of the other ring cannot be in contact with the grinding wheel.
2. The grinding method for improving ovality of an outer raceway of a tapered roller bearing according to claim 1, characterized by: in the two bearing rings which are arranged in a staggered way, the small end face of one bearing ring is contacted with the large end face of the other bearing ring.
3. The grinding method for improving ovality of an outer raceway of a tapered roller bearing according to claim 2, characterized by: the end surfaces of the two bearing rings are mutually adsorbed and lean against each other through electromagnetic conduction.
4. The grinding method for improving ovality of an outer raceway of a tapered roller bearing according to claim 1, characterized by: the two bearing rings are clamped by an electromagnetic coreless clamp.
5. The grinding method for improving ovality of an outer raceway of a tapered roller bearing according to claim 1, characterized by: the long half shaft of the outer race of one bearing ring and the short half shaft of the outer race 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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| 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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| Publication Number | Publication Date |
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| CN112936015A CN112936015A (en) | 2021-06-11 |
| CN112936015B true CN112936015B (en) | 2023-09-19 |
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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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| 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 |
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