CN103692303A - Precision angular contact ball bearing inner race grinding process - Google Patents
Precision angular contact ball bearing inner race grinding process Download PDFInfo
- Publication number
- CN103692303A CN103692303A CN201310715667.5A CN201310715667A CN103692303A CN 103692303 A CN103692303 A CN 103692303A CN 201310715667 A CN201310715667 A CN 201310715667A CN 103692303 A CN103692303 A CN 103692303A
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- CN
- China
- Prior art keywords
- allowance
- dimensional tolerance
- ovality
- ditch
- cylindricity
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- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
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Classifications
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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
- B24B1/00—Processes of grinding or polishing; Use of auxiliary equipment in connection with such processes
-
- C—CHEMISTRY; METALLURGY
- C21—METALLURGY OF IRON
- C21D—MODIFYING THE PHYSICAL STRUCTURE OF FERROUS METALS; GENERAL DEVICES FOR HEAT TREATMENT OF FERROUS OR NON-FERROUS METALS OR ALLOYS; MAKING METAL MALLEABLE, e.g. BY DECARBURISATION OR TEMPERING
- C21D9/00—Heat treatment, e.g. annealing, hardening, quenching or tempering, adapted for particular articles; Furnaces therefor
- C21D9/40—Heat treatment, e.g. annealing, hardening, quenching or tempering, adapted for particular articles; Furnaces therefor for rings; for bearing races
Abstract
The invention relates to a precision angular contact ball bearing inner race grinding process and belongs to the technical field of bearing inner race machining processes. The grinding process includes a coarse machining process and a fine machining process. The size and the geometrical shape of key procedures are adjusted and ensured. Secondary stable structure processing is added in the process to stabilize an original structure of a part and reduce deformation. The plane and the outer diameter are ground for multiple times to improve foundation location precision and further ensure inner channel machining precision. Secondary acid washing and flaw detection inspection are conducted in the process, a metal layer on the working surface of a channel is not damaged, and composition mechanical performance is ensured.
Description
Technical field
The present invention relates to a kind of processing technology of bearing inner race, particularly relate to a kind of accurate angular contact ball bearing inner ring grinding process.
Background technology
The accessory size of precision corner contact ball bearing and geometry require high, are the highest level P4 levels in bearing accuracy rank.Kind of bearings has following feature: 1. the channel surface roughness of this class bearing require high, channel surface roughness be affect vibrating noise, the main project stably of moving, reach 0.04-0.05 micron; 2. the locating surface in process and positioning reference plane required precision are also high, and flatness, the depth of parallelism, ovality etc. will reach 0.001-0.002 millimeter; 3. require to there is the stability of the inherence tissue that reliability is stronger, as organize unstable grind process and the depositing of part in just yielding, size and geometric accuracy are difficult to assurance; 4. this class bearing easily forms machining stress in the mill processing of each operation; 5. the inner ring of this type of high speed and precision angular contact ball bearing, internal structure asymmetric (one side has a grade limit, and another side is without shelves limit), yielding, be difficult to guarantee mill processing dimension and geometric accuracy; 6. the inner ring wall of such ring washer is thin in addition, in hot cold treatment operation and other mill process, is also more yielding part.
Summary of the invention
For overcoming problems of the prior art, the invention provides a kind of accurate angular contact ball bearing inner ring grinding process, solved metaplasia and the machining stress in production process, guaranteed the precision of precision bearing.
For achieving the above object, the technical solution used in the present invention is:
An accurate angular contact ball bearing inner ring grinding process, concrete steps comprise:
(1) tissue is stable processes: placing part, in insulating box, is heated up 140 ° ± 5 ℃, insulation a period of time, with the original structure of stabilizer elements, make its indeformable or few distortion in mill processing;
(2) corase grind both ends of the surface: first grind non-datum level, allowance 0.15 ㎜, dimensional tolerance ± 0.01 ㎜, the datum level of regrinding, allowance 0.03 ㎜, dimensional tolerance ± 0.01 ㎜, the depth of parallelism≤0.004 ㎜, flatness≤0.004 ㎜;
(3) early grind both ends of the surface: allowance is 0, dimensional tolerance 0 ~+0.01 ㎜, the depth of parallelism≤0.002 ㎜, flatness≤0.002 ㎜, for postorder processing performs the basic precision in location;
(4) corase grind external diameter: allowance 0.12 ㎜, dimensional tolerance 0 ~ 0.03mm, ovality, cylindricity, circular deviation all≤0.003 ㎜, perpendicularity≤0.003 ㎜;
(5) corase grind internal diameter: allowance 0.10 ㎜, dimensional tolerance-0.03 ~ 0 ㎜, ovality, cylindricity, circular deviation all≤0.003 ㎜, wall thickness variation≤0.005 ㎜, perpendicularity≤0.003 ㎜;
(6) corase grind bear inner ring grooved railway: allowance 0.10 ㎜, dimensional tolerance-0.03 ~ 0 ㎜, ovality≤0.003 ㎜ of ditch, ditch thickness variation amount≤0.004 ㎜, swing≤0.005 ㎜ of ditch relative datum end face;
(7) pickling, flaw detection: in ditch, do not allowed burn, crackle;
(8) light decorations are processed: do not allow place, angle to have casting skin;
(9) tissue is stable processes: part is packed in insulating box, heat up 140 ° ± 5 ℃, insulation a period of time;
(10) grind eventually both ends of the surface: allowance 0, dimensional tolerance-0.02 ~-0.04mm, the depth of parallelism, flatness all≤0.001mm;
(11) fine grinding external diameter: allowance 0.02 ㎜, dimensional tolerance 0 ~ 0.01 ㎜, ovality, cylindricity, circular deviation all≤0.0025 ㎜, perpendicularity≤0.0015 ㎜;
(12) carefully grind external diameter: allowance 0, dimensional tolerance 0 ~+0.01 ㎜, ovality, cylindricity, circular deviation all≤0.0012 ㎜, perpendicularity≤0.0012 ㎜;
(13) whole mill internal diameter: allowance 0, dimensional tolerance-0.001 ~-0.004mm, ovality, cylindricity, circular deviation all≤0.0015 ㎜, perpendicularity≤0.0012 ㎜;
(14) lappingout external diameter: allowance 0, dimensional tolerance-0.03 ~ 0 ㎜, ovality, circular deviation all≤0.001 ㎜, cylindricity≤0.0012 ㎜, perpendicularity≤0.0012 ㎜;
(15) fine grinding raceway groove: allowance 0.01 ㎜, dimensional tolerance ± 0.015 ㎜, ditch ovality≤0.001 ㎜, ditch thickness variation amount≤0.002 ㎜, swing≤0.002 ㎜ of ditch relative datum face, circularity≤0.0006 ㎜, line profile degree≤0.0008 ㎜;
(16) pickling flaw detection: do not allowed burn, crackle in ditch;
(17) microstoning raceway groove: allowance 0.01 ㎜, dimensional tolerance ± 0.015 ㎜, the requirement in the same step of Geometrical Tolerance Principle (15).
Temperature retention time in described step (1) and step (9) is 7.5 ~ 8.5h.
Pickling in described step (7), flaw detection are full inspection, and the pickling in step (16), flaw detection are sampling observation.
Useful good effect of the present invention is:
1. the present invention is by increase Quadratic Stability tissue treatment in technical process, original structure that can stabilizer elements, Reducing distortion;
This technique by plane and external diameter through attrition process repeatedly, improved origin reference location precision, with this, guarantee the processing of septal fossula;
3. in technical process, carry out white picking flaw detection, guaranteed that the working surface metal level of ditch is not destroyed, guaranteed the mechanical performance of material.
The specific embodiment
Below in conjunction with specific embodiment, the present invention is further illustrated.
The 71909C/P4-01 precision corner contact ball bearing of take is example, and bearing inner race is of a size of: bearing inner race diameter of phi 45 ㎜, and outer bore dia Φ 52.2 ㎜ of inner ring, both ends of the surface thickness 12mm, bear inner ring grooved railway maximum gauge is 49.978mm, bear inner ring grooved railway radius r=3.71mm.
An accurate angular contact ball bearing inner ring grinding process, concrete steps comprise:
(1) tissue is stable processes: placing part, in insulating box, is heated up 140 °, be incubated 8 hours, with the original structure of stabilizer elements, make its indeformable or few distortion in mill processing;
(2) corase grind both ends of the surface: first grind non-datum level, both ends of the surface thickness to 12.15 ± 0.01 ㎜, the datum level of regrinding, both ends of the surface thickness to 12.03 ± 0.01 ㎜, the depth of parallelism is 0.004 ㎜, flatness is 0.004 ㎜;
(3) early grind both ends of the surface: both ends of the surface thickness to 12.0
+ 0.01㎜, the depth of parallelism is 0.002 ㎜, flatness is 0.002 ㎜, for postorder processing performs the basic precision in location;
(4) corase grind external diameter: inner ring external diameter is milled to 52.32
+ 0.03㎜, ovality, cylindricity, circular deviation are 0.003 ㎜, and perpendicularity is 0.003 ㎜;
(5) corase grind internal diameter: inner ring internal diameter is milled to 44.90
-0.03㎜, ovality, cylindricity, circular deviation are 0.003 ㎜, and wall thickness variation is 0.005 ㎜, and perpendicularity is 0.003 ㎜;
(6) corase grind bear inner ring grooved railway: bear inner ring grooved railway maximum gauge is milled to 50.098
+ 0.03㎜, the ovality of ditch is 0.003 ㎜, and ditch thickness variation amount is 0.004 ㎜, and the swing of ditch relative datum end face is 0.005 ㎜;
(7) pickling, flaw detection: inspection entirely, ditch place has not allowed burn, crackle;
(8) light decorations are processed: do not allow place, angle to have casting skin;
(9) tissue is stable processes: part is packed in insulating box, heat up 140 °, be incubated 8 hours;
(10) grind eventually both ends of the surface: both ends of the surface thickness extremely
㎜, the depth of parallelism, flatness are 0.001mm;
(11) fine grinding external diameter: inner ring external diameter is milled to 52.22
+ 0.01㎜, ovality, cylindricity, circular deviation are 0.0025 ㎜, and perpendicularity is 0.0015 ㎜;
(12) carefully grind external diameter: inner ring external diameter carefully grinds to 52.2
+ 0.01㎜, ovality, cylindricity, circular deviation are 0.0012 ㎜, and perpendicularity is 0.0012 ㎜;
(13) grind eventually internal diameter: inner ring internal diameter is milled to
㎜, ovality, cylindricity, circular deviation are 0.0015 ㎜, and perpendicularity is 0.0012 ㎜;
(14) lappingout external diameter: inner ring external diameter is lapping to 52.20
-0.03㎜, ovality, circular deviation are 0.001 ㎜, and cylindricity is 0.0012 ㎜, and perpendicularity is 0.0012 ㎜;
(15) fine grinding raceway groove: bear inner ring grooved railway maximum gauge is finely ground to 49.988 ± 0.015 ㎜, ditch ovality is 0.001 ㎜, and ditch thickness variation amount is 0.002 ㎜, and the swing of ditch relative datum face is 0.002 ㎜, and circularity is 0.0006 ㎜, line profile degree is 0.0008 ㎜;
(16) pickling flaw detection: sampling observation, ditch has not allowed burn, crackle;
(17) microstoning raceway groove: Superfinishing machine superfinishing bear inner ring grooved railway maximum gauge to 49.978 ± 0.015 ㎜, the requirement in the same step of Geometrical Tolerance Principle (15).
The bearing inner race of producing through this technical process has reached the requirement of national standard P4 level.
Claims (3)
1. an accurate angular contact ball bearing inner ring grinding process, is characterized in that, concrete steps comprise:
(1) tissue is stable processes: placing part, in insulating box, is heated up 140 ° ± 5 ℃, insulation a period of time, with the original structure of stabilizer elements, make its indeformable or few distortion in mill processing;
(2) corase grind both ends of the surface: first grind non-datum level, allowance 0.15 ㎜, dimensional tolerance ± 0.01 ㎜, the datum level of regrinding, allowance 0.03 ㎜, dimensional tolerance ± 0.01 ㎜, the depth of parallelism≤0.004 ㎜, flatness≤0.004 ㎜;
(3) early grind both ends of the surface: allowance is 0, dimensional tolerance 0 ~+0.01 ㎜, the depth of parallelism≤0.002 ㎜, flatness≤0.002 ㎜, for postorder processing performs the basic precision in location;
(4) corase grind external diameter: allowance 0.12 ㎜, dimensional tolerance 0 ~ 0.03mm, ovality, cylindricity, circular deviation all≤0.003 ㎜, perpendicularity≤0.003 ㎜;
(5) corase grind internal diameter: allowance 0.10 ㎜, dimensional tolerance-0.03 ~ 0 ㎜, ovality, cylindricity, circular deviation all≤0.003 ㎜, wall thickness variation≤0.005 ㎜, perpendicularity≤0.003 ㎜;
(6) corase grind bear inner ring grooved railway: allowance 0.10 ㎜, dimensional tolerance-0.03 ~ 0 ㎜, ovality≤0.003 ㎜ of ditch, ditch thickness variation amount≤0.004 ㎜, swing≤0.005 ㎜ of ditch relative datum end face;
(7) pickling, flaw detection: in ditch, do not allowed burn, crackle;
(8) light decorations are processed: do not allow place, angle to have casting skin;
(9) tissue is stable processes: part is packed in insulating box, heat up 140 ° ± 5 ℃, insulation a period of time;
(10) grind eventually both ends of the surface: allowance 0, dimensional tolerance-0.02 ~-0.04mm, the depth of parallelism, flatness all≤0.001mm;
(11) fine grinding external diameter: allowance 0.02 ㎜, dimensional tolerance 0 ~ 0.01 ㎜, ovality, cylindricity, circular deviation all≤0.0025 ㎜, perpendicularity≤0.0015 ㎜;
(12) carefully grind external diameter: allowance 0, dimensional tolerance 0 ~+0.01 ㎜, ovality, cylindricity, circular deviation all≤0.0012 ㎜, perpendicularity≤0.0012 ㎜;
(13) whole mill internal diameter: allowance 0, dimensional tolerance-0.001 ~-0.004mm, ovality, cylindricity, circular deviation all≤0.0015 ㎜, perpendicularity≤0.0012 ㎜;
(14) lappingout external diameter: allowance 0, dimensional tolerance-0.03 ~ 0 ㎜, ovality, circular deviation all≤0.001 ㎜, cylindricity≤0.0012 ㎜, perpendicularity≤0.0012 ㎜;
(15) fine grinding raceway groove: allowance 0.01 ㎜, dimensional tolerance ± 0.015 ㎜, ditch ovality≤0.001 ㎜, ditch thickness variation amount≤0.002 ㎜, swing≤0.002 ㎜ of ditch relative datum face, circularity≤0.0006 ㎜, line profile degree≤0.0008 ㎜;
(16) pickling flaw detection: do not allowed burn, crackle in ditch;
(17) microstoning raceway groove: allowance 0.01 ㎜, dimensional tolerance ± 0.015 ㎜, the requirement in the same step of Geometrical Tolerance Principle (15).
2. accurate angular contact ball bearing inner ring grinding process according to claim 1, is characterized in that, the temperature retention time in described step (1) and step (9) is 7.5 ~ 8.5h.
3. accurate angular contact ball bearing inner ring grinding process according to claim 1, is characterized in that, the pickling in described step (7), flaw detection are full inspection, and the pickling in step (16), flaw detection are sampling observation.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310715667.5A CN103692303B (en) | 2013-12-23 | 2013-12-23 | Accurate angular contact ball bearing inner ring grinding process |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310715667.5A CN103692303B (en) | 2013-12-23 | 2013-12-23 | Accurate angular contact ball bearing inner ring grinding process |
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| Publication Number | Publication Date |
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| CN103692303A true CN103692303A (en) | 2014-04-02 |
| CN103692303B CN103692303B (en) | 2016-02-10 |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103939477A (en) * | 2014-05-14 | 2014-07-23 | 浙江优特轴承有限公司 | Machining method of assembly line of angular contact ball bearing sleeve ring |
| CN105965351A (en) * | 2016-05-20 | 2016-09-28 | 中航工业哈尔滨轴承有限公司 | Heat-resisting steel ferrule channel grinding technology |
| CN108044409A (en) * | 2017-11-29 | 2018-05-18 | 上海市轴承技术研究所 | Its method of surface finish after self-lubricating knuckle bearing inner ring spherical surface hard chrome plating |
| CN109605177A (en) * | 2018-12-11 | 2019-04-12 | 贵州天马虹山轴承有限公司 | A kind of processing technology controlling bearing inside/outside lasso ball race grinding stress |
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Patent Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
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| US6325867B1 (en) * | 1993-05-31 | 2001-12-04 | Nsk Ltd. | Rolling bearing and heat treatment method therefor |
| CN101186005A (en) * | 2007-11-30 | 2008-05-28 | 洛阳轴研科技股份有限公司 | Processing technique of 9Cr18 stainless steel capable of being improved to G3 level |
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103939477A (en) * | 2014-05-14 | 2014-07-23 | 浙江优特轴承有限公司 | Machining method of assembly line of angular contact ball bearing sleeve ring |
| CN105965351A (en) * | 2016-05-20 | 2016-09-28 | 中航工业哈尔滨轴承有限公司 | Heat-resisting steel ferrule channel grinding technology |
| CN105965351B (en) * | 2016-05-20 | 2018-07-31 | 中航工业哈尔滨轴承有限公司 | A kind of heat resisting steel ring raceways grinding process |
| CN108044409A (en) * | 2017-11-29 | 2018-05-18 | 上海市轴承技术研究所 | Its method of surface finish after self-lubricating knuckle bearing inner ring spherical surface hard chrome plating |
| CN109605177A (en) * | 2018-12-11 | 2019-04-12 | 贵州天马虹山轴承有限公司 | A kind of processing technology controlling bearing inside/outside lasso ball race grinding stress |
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|---|---|
| CN103692303B (en) | 2016-02-10 |
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