CN112025211A - Forming method of conical bearing roller - Google Patents
Forming method of conical bearing roller Download PDFInfo
- Publication number
- CN112025211A CN112025211A CN202010683664.8A CN202010683664A CN112025211A CN 112025211 A CN112025211 A CN 112025211A CN 202010683664 A CN202010683664 A CN 202010683664A CN 112025211 A CN112025211 A CN 112025211A
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- grinding
- drying
- rolling surface
- steps
- temperature
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Links
- 238000000034 method Methods 0.000 title claims abstract description 21
- 238000000227 grinding Methods 0.000 claims abstract description 30
- 238000001035 drying Methods 0.000 claims abstract description 22
- 238000005096 rolling process Methods 0.000 claims abstract description 22
- 238000010438 heat treatment Methods 0.000 claims abstract description 18
- 238000010791 quenching Methods 0.000 claims abstract description 18
- 230000000171 quenching effect Effects 0.000 claims abstract description 18
- 238000005242 forging Methods 0.000 claims abstract description 17
- 238000005406 washing Methods 0.000 claims abstract description 14
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 9
- 238000000465 moulding Methods 0.000 claims abstract description 6
- 239000011248 coating agent Substances 0.000 claims abstract description 5
- 238000000576 coating method Methods 0.000 claims abstract description 5
- 238000007689 inspection Methods 0.000 claims abstract description 5
- 238000004806 packaging method and process Methods 0.000 claims abstract description 5
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 claims description 20
- ATUOYWHBWRKTHZ-UHFFFAOYSA-N Propane Chemical compound CCC ATUOYWHBWRKTHZ-UHFFFAOYSA-N 0.000 claims description 10
- 229910052757 nitrogen Inorganic materials 0.000 claims description 10
- 238000001816 cooling Methods 0.000 claims description 8
- 239000001294 propane Substances 0.000 claims description 5
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 claims description 4
- 238000004140 cleaning Methods 0.000 claims description 4
- 229910052760 oxygen Inorganic materials 0.000 claims description 4
- 239000001301 oxygen Substances 0.000 claims description 4
- 229910052698 phosphorus Inorganic materials 0.000 claims description 4
- 239000000126 substance Substances 0.000 claims description 4
- 229910052717 sulfur Inorganic materials 0.000 claims description 4
- 238000005496 tempering Methods 0.000 claims description 4
- 229910000831 Steel Inorganic materials 0.000 abstract description 3
- 239000010959 steel Substances 0.000 abstract description 3
- 239000007789 gas Substances 0.000 description 2
- 238000004519 manufacturing process Methods 0.000 description 2
- 238000005520 cutting process Methods 0.000 description 1
Classifications
-
- 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
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Heat Treatment Of Articles (AREA)
- Rolling Contact Bearings (AREA)
Abstract
The invention discloses a method for molding a conical bearing roller, which comprises the following steps: sawing → heating → forging → blank forming → deburring or ring belt → soft grinding raceway surface → soft grinding double end surface → rough grinding rolling surface → fine grinding rolling surface → grinding ball base surface → finish grinding rolling surface → superfinishing rolling surface → washing, drying → quenching → water washing and drying → finish inspection appearance → oil coating and packaging. The conical bearing roller obtained by the forming method has good comprehensive mechanical properties, and the hardness, strength, extensibility, shrinkage and the like of the conical bearing roller are superior to those of common bearing steel, so that the conical bearing roller is suitable for being applied to working environments with impact resistance, high pressure and the like.
Description
Technical Field
The invention relates to the technical field of bearing processing, in particular to a method for forming a conical bearing roller.
Background
The roller belongs to the rolling body and the steel ball are the most important components of the bearing, and is also the most used rolling body in the bearing industry, and the quality of the roller directly influences the quality of the bearing. The existing manufacturing process of the high-speed rail tapered roller bearing roller has the problems that firstly, the product has better cutting performance and the quenching deformation is serious in the heat treatment process; secondly, the roller is easy to be collided and damaged in the production process, and the surface quality of the roller is seriously influenced.
Disclosure of Invention
The technical problem to be solved by the invention is as follows: a molding method for improving the quality of a conical bearing roller is provided.
In order to solve the technical problems, the technical scheme provided by the invention is as follows: a method for molding a conical bearing roller comprises the following steps: sawing → heating → forging → blank forming → deburring or ring belt → soft grinding raceway surface → soft grinding double end surface → rough grinding rolling surface → fine grinding rolling surface → grinding ball base surface → finish grinding rolling surface → superfinishing rolling surface → washing, drying → quenching → water washing and drying → finish inspection appearance → oil coating and packaging.
The forging: the forging stock comprises the following chemical components in percentage by weight: c: 0.98-1.00, N: 0.6-1.0, Mn: 0.3, Ni: 0.2-0.25, Si: 0.2-0.3, 0.015% S: B, 0.024% P: B, Cr: 1.50-1.60, heating to 600 ℃ and 700 ℃, forging, heating to 830 ℃, keeping the temperature for 3 hours, cooling to 300 ℃ at 22 ℃/hour, and cooling to the normal temperature at 20 ℃/hour.
The cleaning and drying steps are as follows: firstly, removing oil, wherein the temperature of an oil removing area is as follows: 60-80 ℃, water washing temperature: 50-60 ℃, drying zone temperature: drying at 105 + -2 deg.C for 10 min.
The quenching step comprises: the quenching temperature is 870-890 ℃, and the secondary tempering heat treatment is 160-165 ℃.
The quenching step comprises: adopts nitrogen-based atmosphere protection, and comprises nitrogen with purity of 85-95%, oxygen content of not more than 0.3-0.5%, and nitrogen introduction amount of 50m3/h-65m3H, propane feed rate 0.2m3/h-0.4m3/h。
Has the advantages that: the conical bearing roller obtained by the forming method has good comprehensive mechanical properties, and the hardness, strength, extensibility, shrinkage and the like of the conical bearing roller are superior to those of common bearing steel, so that the conical bearing roller is suitable for being applied to working environments with impact resistance, high pressure and the like.
Detailed Description
The process of the present invention is further illustrated below with reference to examples, but the invention is not limited thereto.
Example 1
A method for molding a conical bearing roller comprises the following steps: sawing → heating → forging → blank forming → deburring or ring belt → soft grinding raceway surface → soft grinding double end surface → rough grinding rolling surface → fine grinding rolling surface → grinding ball base surface → finish grinding rolling surface → superfinishing rolling surface → washing, drying → quenching → water washing and drying → finish inspection appearance → oil coating and packaging.
The forging: the forging stock comprises the following chemical components in percentage by weight: c: 0.98, N: 0.8, Mn: 0.3, Ni: 0.2, Si: 0.3, 0.015% S: B, 0.024% P: B, Cr: 1.50, heating to 600 ℃ and 700 ℃, forging, heating to 830 ℃, preserving heat for 3 hours, cooling to 300 ℃ at 22 ℃/hour, and cooling to normal temperature at 20 ℃/hour.
The cleaning and drying steps are as follows: firstly, removing oil, wherein the temperature of an oil removing area is as follows: 65 ℃, water washing temperature: 55 ℃, drying zone temperature: drying at 105 deg.C for 10 min.
The quenching step comprises: the quenching temperature is 890 ℃ and the secondary tempering heat treatment is 160 ℃.
The quenching step comprises: adopts nitrogen-based atmosphere protection, and comprises nitrogen with purity of 90% and oxygen content of not more than 0.3%, and a small amount of propane gas3H, propane feed rate 0.3m3/h。
Example 2
A method for molding a conical bearing roller comprises the following steps: sawing → heating → forging → blank forming → deburring or ring belt → soft grinding raceway surface → soft grinding double end surface → rough grinding rolling surface → fine grinding rolling surface → grinding ball base surface → finish grinding rolling surface → superfinishing rolling surface → washing, drying → quenching → water washing and drying → finish inspection appearance → oil coating and packaging.
The forging: the forging stock comprises the following chemical components in percentage by weight: c: 1.00, N: 0.80, Mn: 0.3, Ni: 0.25, Si: 0.3, 0.015% S: B, 0.024% P: B, Cr: 1.60, heating to 700 ℃, forging, heating to 830 ℃, preserving heat for 3 hours, cooling to 300 ℃ at 22 ℃/hour, and cooling to the normal temperature at 20 ℃/hour.
The cleaning and drying steps are as follows: firstly, removing oil, wherein the temperature of an oil removing area is as follows: 70 ℃, water washing temperature: 60 ℃, drying zone temperature: drying at 106 deg.C for 10 min.
The quenching step comprises: the quenching temperature is 880 ℃, and the secondary tempering heat treatment is 163 ℃.
The quenching step comprises: adopts nitrogen-based atmosphere protection, and comprises nitrogen with purity of 95% and oxygen content of not more than 0.4% and a small amount of propane gas3H, propaneThe introduction amount is 0.3m3/h。
Claims (5)
1. A method for molding a conical bearing roller comprises the following steps: sawing → heating → forging → blank forming → deburring or ring belt → soft grinding raceway surface → soft grinding double end surface → rough grinding rolling surface → fine grinding rolling surface → grinding ball base surface → finish grinding rolling surface → superfinishing rolling surface → washing, drying → quenching → water washing and drying → finish inspection appearance → oil coating and packaging.
2. The method of claim 1, wherein the method comprises the steps of: the forging: the forging stock comprises the following chemical components in percentage by weight: c: 0.98-1.00, N: 0.6-1.0, Mn: 0.3, Ni: 0.2-0.25, Si: 0.2-0.3, 0.015% S: B, 0.024% P: B, Cr: 1.50-1.60, heating to 600 ℃ and 700 ℃, forging, heating to 830 ℃, keeping the temperature for 3 hours, cooling to 300 ℃ at 22 ℃/hour, and cooling to the normal temperature at 20 ℃/hour.
3. The method of claim 1, wherein the method comprises the steps of: the cleaning and drying steps are as follows: firstly, removing oil, wherein the temperature of an oil removing area is as follows: 60-80 ℃, water washing temperature: 50-60 ℃, drying zone temperature: drying at 105 + -2 deg.C for 10 min.
4. The method of claim 1, wherein the method comprises the steps of: the quenching step comprises: the quenching temperature is 870-890 ℃, and the secondary tempering heat treatment is 160-165 ℃.
5. The method of claim 4, wherein the method comprises the steps of: the quenching step comprises: adopts nitrogen-based atmosphere protection, and comprises nitrogen with purity of 85-95%, oxygen content of not more than 0.3-0.5%, and nitrogen introduction amount of 50m3/h-65m3H, propane feed rate 0.2m3/h-0.4m3/h。
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010683664.8A CN112025211A (en) | 2020-07-16 | 2020-07-16 | Forming method of conical bearing roller |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010683664.8A CN112025211A (en) | 2020-07-16 | 2020-07-16 | Forming method of conical bearing roller |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN112025211A true CN112025211A (en) | 2020-12-04 |
Family
ID=73579239
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202010683664.8A Pending CN112025211A (en) | 2020-07-16 | 2020-07-16 | Forming method of conical bearing roller |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN112025211A (en) |
Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101460754A (en) * | 2006-06-01 | 2009-06-17 | Ntn株式会社 | Process for manufacturing rolling member, process for manufacturing rolling bearing, raceway member of rolling bearing and rolling bearing |
| CN103710509A (en) * | 2014-01-08 | 2014-04-09 | 江苏力星通用钢球股份有限公司 | Manufacturing method of precise tapered roller specially for high speed train unit |
| CN103821828A (en) * | 2014-02-21 | 2014-05-28 | 山东东阿钢球集团有限公司 | Production method of precise tapered roller |
| CN104099448A (en) * | 2014-07-31 | 2014-10-15 | 江苏力星通用钢球股份有限公司 | Roller heat treatment zero decarbonization control method for mesh belt furnace |
| US20140348459A1 (en) * | 2010-11-16 | 2014-11-27 | Harnischfeger Technologies, Inc. | Roller circle assembly for heavy machinery |
| CN106435397A (en) * | 2016-11-09 | 2017-02-22 | 安徽千禧精密轴承制造有限公司 | Carburized bearing roller processing technology |
| CN108105261A (en) * | 2017-12-08 | 2018-06-01 | 徐州德高电动车科技有限公司 | A kind of processing method of bearing ball |
| JP2019066040A (en) * | 2017-09-28 | 2019-04-25 | Ntn株式会社 | Taper roller bearing |
-
2020
- 2020-07-16 CN CN202010683664.8A patent/CN112025211A/en active Pending
Patent Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101460754A (en) * | 2006-06-01 | 2009-06-17 | Ntn株式会社 | Process for manufacturing rolling member, process for manufacturing rolling bearing, raceway member of rolling bearing and rolling bearing |
| US20140348459A1 (en) * | 2010-11-16 | 2014-11-27 | Harnischfeger Technologies, Inc. | Roller circle assembly for heavy machinery |
| CN103710509A (en) * | 2014-01-08 | 2014-04-09 | 江苏力星通用钢球股份有限公司 | Manufacturing method of precise tapered roller specially for high speed train unit |
| CN103821828A (en) * | 2014-02-21 | 2014-05-28 | 山东东阿钢球集团有限公司 | Production method of precise tapered roller |
| CN104099448A (en) * | 2014-07-31 | 2014-10-15 | 江苏力星通用钢球股份有限公司 | Roller heat treatment zero decarbonization control method for mesh belt furnace |
| CN106435397A (en) * | 2016-11-09 | 2017-02-22 | 安徽千禧精密轴承制造有限公司 | Carburized bearing roller processing technology |
| JP2019066040A (en) * | 2017-09-28 | 2019-04-25 | Ntn株式会社 | Taper roller bearing |
| CN108105261A (en) * | 2017-12-08 | 2018-06-01 | 徐州德高电动车科技有限公司 | A kind of processing method of bearing ball |
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| PB01 | Publication | ||
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Application publication date: 20201204 |