CN114406608A - Bearing ring grinding and expanding manufacturing process - Google Patents
Bearing ring grinding and expanding manufacturing process Download PDFInfo
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- CN114406608A CN114406608A CN202111588746.5A CN202111588746A CN114406608A CN 114406608 A CN114406608 A CN 114406608A CN 202111588746 A CN202111588746 A CN 202111588746A CN 114406608 A CN114406608 A CN 114406608A
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- blank
- bearing ring
- manufacturing process
- blind hole
- cylindrical surface
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23P—METAL-WORKING NOT OTHERWISE PROVIDED FOR; COMBINED OPERATIONS; UNIVERSAL MACHINE TOOLS
- B23P15/00—Making specific metal objects by operations not covered by a single other subclass or a group in this subclass
- B23P15/003—Making specific metal objects by operations not covered by a single other subclass or a group in this subclass bearings
Abstract
The invention belongs to the technical field of bearing manufacturing, and particularly relates to a bearing ring rolling and expanding manufacturing process. The method comprises the following steps: cutting the metal bar into sections to obtain sectional materials; step two: upsetting the sectional materials to obtain cake materials; step three: placing the cake material in a forging die, and forging to obtain a first blank with an upper blind hole on the upper side and a lower blind hole on the lower side; step four: perforating the first blank, removing the connecting material blocked between the upper blind hole and the lower blind hole, and obtaining a second blank; step five: rolling the second blank to obtain a third blank of which the inner diameter is slightly smaller than the finished product of the bearing ring, the outer diameter is slightly larger than the finished product of the bearing ring and the height is slightly larger than the finished product of the bearing ring; step six: and machining the third blank to obtain a finished bearing ring product. The grinding and enlarging manufacturing process of the bearing ring provided by the invention can be used for manufacturing the bearing ring with high precision and stable size in batch, the raw material loss in the manufacturing process is very little, and the machining workload is lower, so that the grinding and enlarging manufacturing process has higher production efficiency and lower production cost.
Description
Technical Field
The invention belongs to the technical field of bearing manufacturing, and particularly relates to a bearing ring rolling and expanding manufacturing process.
Background
The bearing is an important part of various mechanical equipment and is used for being arranged between a shaft and a shaft seat to convert sliding friction into rolling friction so as to reduce mechanical wear. The rolling bearing generally comprises an inner ring, an outer ring, rolling bodies and a retainer. The inner ring is matched with the shaft and rotates together with the shaft; the outer ring is matched with the bearing seat to play a supporting role.
The manufacture of the bearing rings has a very important influence on the bearing level, both on the accuracy and the service life of the bearing. In order to meet the requirements of high precision, high strength, wear resistance and the like of bearing rings, the conventional bearing rings generally adopt a processing mode combining forging and machining, namely, a general outline is forged and then machined to meet the precision requirement. Although the existing manufacturing process can obtain the bearing ring meeting the use requirement, the existing manufacturing process combining forging and machining has the problems of large processing loss, more raw material waste, lower manufacturing efficiency, higher cost and the like.
Disclosure of Invention
Aiming at the defects in the prior art, the invention provides a bearing ring rolling and expanding manufacturing process.
The invention provides a bearing ring rolling and expanding manufacturing process which comprises the following steps:
the method comprises the following steps: cutting the metal bar into sections to obtain sectional materials;
step two: upsetting the sectional materials to obtain cake materials;
step three: placing the cake material in a forging die, and forging to obtain a first blank with an upper blind hole on the upper side and a lower blind hole on the lower side;
step four: perforating the first blank, removing the connecting material blocked between the upper blind hole and the lower blind hole, and obtaining a second blank;
step five: rolling the second blank to obtain a third blank of which the inner diameter is slightly smaller than the finished product of the bearing ring, the outer diameter is slightly larger than the finished product of the bearing ring and the height is slightly larger than the finished product of the bearing ring;
step six: and machining the third blank to obtain a finished bearing ring product.
The invention provides a grinding and expanding manufacturing process of a bearing ring. The steps are mutually matched and connected, raw material loss in the manufacturing process is very little, machining workload is low, and therefore the production efficiency is high, and the bearing rings with accurate and stable sizes can be manufactured in batches.
Furthermore, in the fifth step of the bearing ring rolling and expanding manufacturing process, the second blank is rolled and expanded by a cold rolling process, the problem of expansion with heat and contraction with cold does not need to be considered for the second blank manufactured by cold rolling, the size is accurate, and the raw materials hardly generate oxidation loss.
Further, the first blank manufactured in the third bearing ring rolling and expanding manufacturing process is cylindrical as a whole, the outer contour of the first blank comprises a first cylindrical surface, a contraction surface and a second cylindrical surface which are connected in a transition mode sequentially from bottom to top, the diameter of the first cylindrical surface is larger than that of the second cylindrical surface, and the height of the first cylindrical surface is larger than that of the second cylindrical surface.
Further, in the first blank of the bearing ring rolling and enlarging manufacturing process, the depth of the lower blind hole is slightly larger than the height of the first cylindrical surface, and the depth of the upper blind hole is slightly larger than the height of the second cylindrical surface.
Furthermore, in the fourth step of the bearing ring rolling and enlarging manufacturing process, a punch is used for punching from top to bottom, and the connecting material between the upper blind hole and the lower blind hole is punched to be removed, so that a second blank is obtained.
Further, the third blank manufactured in the fifth bearing ring rolling and enlarging manufacturing process step is annular; the outer diameter of the third blank is constant up and down; the third blank has a small inner diameter in the middle and is in an open horn mouth shape at the upper end and the lower end.
Furthermore, in the bearing ring rolling and expanding manufacturing process, the upper part and the lower part of the third blank are in mirror symmetry.
Further, in the sixth step of the bearing ring rolling and expanding manufacturing process, the third blank is machined, and the machining comprises shaping the inner wall, the outer wall, the upper end face and the lower end face of the third blank, so that the finished bearing ring meets the size composite design requirement; and the inner side of the third blank is provided with a pair of sealing grooves which are in mirror symmetry up and down.
Has the advantages that: compared with the prior art, the rolling and expanding manufacturing process for the bearing ring, provided by the invention, has the advantages that the process is reasonable in design, the steps are consecutive and ordered, the bearing ring with high precision and stable size can be manufactured in batch, the raw material loss in the manufacturing process is very little, the machining workload is lower, the production efficiency is higher, the production cost is lower, and the practical application value is higher.
Drawings
FIG. 1 is a schematic view of a section.
Fig. 2 is a schematic view of a cake.
Fig. 3 is a schematic view of a first blank.
Fig. 4 is a schematic view of a second blank.
Fig. 5 is a schematic view of a third blank.
Fig. 6 is a schematic view of a finished bearing ring.
Fig. 7 is a schematic comparison of a third blank and a finished bearing ring.
In the figure, a first cylindrical surface 41, a constricted surface 42, and a second cylindrical surface 43.
Detailed Description
The invention is further illustrated by the following specific examples, which are illustrative and intended to illustrate the problem and explain the invention, but not limiting.
Example 1
A bearing ring rolling and expanding process, as shown in fig. 1 to 4, comprising the steps of:
the method comprises the following steps: cutting the metal bar into sections to obtain sectional materials;
step two: upsetting the sectional materials to obtain cake materials;
step three: placing the cake material in a forging die, and forging to obtain a first blank with an upper blind hole on the upper side and a lower blind hole on the lower side;
step four: perforating the first blank, removing the connecting material blocked between the upper blind hole and the lower blind hole, and obtaining a second blank;
step five: rolling the second blank to obtain a third blank of which the inner diameter is slightly smaller than the finished product of the bearing ring, the outer diameter is slightly larger than the finished product of the bearing ring and the height is slightly larger than the finished product of the bearing ring;
step six: and machining the third blank to obtain a finished bearing ring product.
In the fifth step of this embodiment, a cold rolling process is used to roll the second blank.
The first blank of this embodiment is cylindrical as a whole, and its outer contour includes from bottom to top a first cylindrical surface 41, a contraction surface 42, and a second cylindrical surface 43 that are transitionally connected in order, and the diameter of the first cylindrical surface 41 is greater than the second cylindrical surface 43, and the height of the first cylindrical surface 41 is greater than the second cylindrical surface 43.
In the first blank of this embodiment, the depth of the lower blind hole is slightly larger than the height of the first cylindrical surface 41, and the depth of the upper blind hole is slightly larger than the height of the second cylindrical surface 43.
In the fourth step of this embodiment, a punch is used to punch from top to bottom, and the connecting material between the upper blind hole and the lower blind hole is punched to remove the blocking, so as to obtain the second blank.
The third blank prepared in the fifth step of this embodiment is annular; the outer diameter of the third blank is constant up and down; the third blank has a small inner diameter in the middle and is in an open horn mouth shape at the upper end and the lower end.
The third blank of this embodiment is mirror image in top and bottom.
In the sixth step of this embodiment, the machining of the third blank includes shaping the inner wall, the outer wall, the upper end surface, and the lower end surface of the third blank, so that the finished bearing ring meets the size composite design requirement; and the inner side of the third blank is provided with a pair of sealing grooves which are in mirror symmetry up and down.
The above embodiments are exemplary only, and are intended to illustrate the technical concept and features of the present invention so that those skilled in the art can understand the contents of the present invention and implement the present invention, and not to limit the scope of the present invention. All equivalent changes and modifications made according to the spirit of the present invention should be covered within the protection scope of the present invention.
Claims (8)
1. The bearing ring grinding and expanding manufacturing process is characterized in that: the method comprises the following steps:
the method comprises the following steps: cutting the metal bar into sections to obtain sectional materials;
step two: upsetting the sectional materials to obtain cake materials;
step three: placing the cake material in a forging die, and forging to obtain a first blank with an upper blind hole on the upper side and a lower blind hole on the lower side;
step four: perforating the first blank, removing the connecting material blocked between the upper blind hole and the lower blind hole, and obtaining a second blank;
step five: rolling the second blank to obtain a third blank of which the inner diameter is slightly smaller than the finished product of the bearing ring, the outer diameter is slightly larger than the finished product of the bearing ring and the height is slightly larger than the finished product of the bearing ring;
step six: and machining the third blank to obtain a finished bearing ring product.
2. A bearing ring rolling manufacturing process according to claim 1, characterized in that: and fifthly, rolling the second blank by adopting a cold rolling process.
3. A bearing ring rolling manufacturing process according to claim 1, characterized in that: the first blank is cylindrical as a whole, the outer contour of the first blank comprises a first cylindrical surface (41), a contraction surface (42) and a second cylindrical surface (43) which are connected in a transition mode sequentially from bottom to top, the diameter of the first cylindrical surface (41) is larger than that of the second cylindrical surface (43), and the height of the first cylindrical surface (41) is larger than that of the second cylindrical surface (43).
4. A bearing ring rolling manufacturing process according to claim 3, wherein: in the first blank, the depth of the lower blind hole is slightly larger than the height of the first cylindrical surface (41), and the depth of the upper blind hole is slightly larger than the height of the second cylindrical surface (43).
5. A bearing ring rolling manufacturing process according to claim 1, characterized in that: and in the fourth step, punching from top to bottom by using a punch to remove the connecting material blocked between the upper blind hole and the lower blind hole, thereby obtaining a second blank.
6. A bearing ring rolling manufacturing process according to claim 2, wherein: the third blank prepared in the fifth step is annular; the outer diameter of the third blank is constant up and down; the third blank has a small inner diameter in the middle and is in an open horn mouth shape at the upper end and the lower end.
7. A bearing ring rolling manufacturing process according to claim 6, wherein: the upper part and the lower part of the third blank are in mirror symmetry.
8. A bearing ring rolling manufacturing process according to claim 7, wherein: machining the third blank in the sixth step, wherein the machining comprises shaping the inner wall, the outer wall, the upper end face and the lower end face of the third blank so that the finished bearing ring has the size composite design requirement; and the inner side of the third blank is provided with a pair of sealing grooves which are in mirror symmetry up and down.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111588746.5A CN114406608A (en) | 2021-12-23 | 2021-12-23 | Bearing ring grinding and expanding manufacturing process |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111588746.5A CN114406608A (en) | 2021-12-23 | 2021-12-23 | Bearing ring grinding and expanding manufacturing process |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN114406608A true CN114406608A (en) | 2022-04-29 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN202111588746.5A Pending CN114406608A (en) | 2021-12-23 | 2021-12-23 | Bearing ring grinding and expanding manufacturing process |
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| CN101027143A (en) * | 2004-09-22 | 2007-08-29 | 日本精工株式会社 | Raceway ring for radial ball bearing, method of producing the raceway ring, and method and device for producing high precision ring |
| US20080089631A1 (en) * | 2004-09-22 | 2008-04-17 | Nsk Ltd | Raceway Ring for Radial Ball Bearing and Manufacturing Method Thereof, and Manufacturing Method of High Accurate Ring and Manufacturing Apparatus Thereof |
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| CN102909535A (en) * | 2012-11-01 | 2013-02-06 | 无锡民联轴承制造有限公司 | Method for rolling and forging bearing ring once |
| CN103350329A (en) * | 2013-06-30 | 2013-10-16 | 贵州安大航空锻造有限责任公司 | Blank making method of large 4340 H steel special-shaped ring forging |
| CN104493439A (en) * | 2014-11-28 | 2015-04-08 | 江阴吉爱倍万达精工有限公司 | Orging process of outer blank for double-row tapered roller bearings |
| CN109909437A (en) * | 2019-05-05 | 2019-06-21 | 临清市同兴轴承锻造有限公司 | A kind of bearing ring forging processing technology and its system of processing |
| CN110814267A (en) * | 2019-11-21 | 2020-02-21 | 广州小出钢管有限公司 | Manufacturing process of oxygen sensor nut for automobile |
-
2021
- 2021-12-23 CN CN202111588746.5A patent/CN114406608A/en active Pending
Patent Citations (14)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101027143A (en) * | 2004-09-22 | 2007-08-29 | 日本精工株式会社 | Raceway ring for radial ball bearing, method of producing the raceway ring, and method and device for producing high precision ring |
| US20080089631A1 (en) * | 2004-09-22 | 2008-04-17 | Nsk Ltd | Raceway Ring for Radial Ball Bearing and Manufacturing Method Thereof, and Manufacturing Method of High Accurate Ring and Manufacturing Apparatus Thereof |
| JP2006123003A (en) * | 2004-10-01 | 2006-05-18 | Nsk Ltd | Method and apparatus for producing high precision ring |
| JP2008128256A (en) * | 2006-11-16 | 2008-06-05 | Nsk Ltd | Method of manufacturing bearing ring member |
| JP2008126286A (en) * | 2006-11-22 | 2008-06-05 | Nsk Ltd | Method for producing orbital ring member |
| JP2008196662A (en) * | 2007-02-15 | 2008-08-28 | Ntn Corp | Outer ring manufacturing method |
| JP2008296241A (en) * | 2007-05-31 | 2008-12-11 | Nsk Ltd | Method for manufacturing bearing ring for rolling bearing |
| JP2009008126A (en) * | 2007-06-26 | 2009-01-15 | Nsk Ltd | Manufacturing method of raceway ring for rolling bearing |
| CN102179683A (en) * | 2011-04-26 | 2011-09-14 | 张家港海陆环形锻件有限公司 | Manufacturing process for cylindrical blank of annular element |
| CN102909535A (en) * | 2012-11-01 | 2013-02-06 | 无锡民联轴承制造有限公司 | Method for rolling and forging bearing ring once |
| CN103350329A (en) * | 2013-06-30 | 2013-10-16 | 贵州安大航空锻造有限责任公司 | Blank making method of large 4340 H steel special-shaped ring forging |
| CN104493439A (en) * | 2014-11-28 | 2015-04-08 | 江阴吉爱倍万达精工有限公司 | Orging process of outer blank for double-row tapered roller bearings |
| CN109909437A (en) * | 2019-05-05 | 2019-06-21 | 临清市同兴轴承锻造有限公司 | A kind of bearing ring forging processing technology and its system of processing |
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