CN102537066B - A kind of bearing shell and processing method with surface microporous structure - Google Patents
A kind of bearing shell and processing method with surface microporous structure Download PDFInfo
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- CN102537066B CN102537066B CN201210049529.3A CN201210049529A CN102537066B CN 102537066 B CN102537066 B CN 102537066B CN 201210049529 A CN201210049529 A CN 201210049529A CN 102537066 B CN102537066 B CN 102537066B
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- bearing shell
- alloy layer
- micropore
- antifriction alloy
- microporous structure
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Abstract
Have bearing shell and the processing method of surface microporous structure, described bearing shell comprises bearing shell body, and the body comprises metal watt back of the body and antifriction alloy layer composition, wherein antifriction alloy layer is the friction layer between bearing shell and axle journal.It is characterized in that the internal surface of antifriction alloy layer is processed with microstructure.Described microstructure is the micropore adopting laser micro-machining technology processing, and micropore is regularly arranged, and diameter is 150 μm ~ 200 μm, and the degree of depth is 35 μm ~ 50 μm.This bearing shell has internal surface microcellular structure, effectively can improve the bearing capacity of oil film, lubrication effect is obviously improved.
Description
Technical field
The invention belongs to technical field of automobile engine, be specially main axle bush or the connecting rod bearing shell of motor, the microcellular structure of the regular arrangement of its surface band.
Background technique
Bearing shell, is widely used in motor as a kind of sliding bearing.Bearing shell is usually carried on the back by metal tile and antifriction alloy layer forms, and forms sliding friction pair with crankshaft journal.Motor presents the trend that mean effective pressure and rotating speed improve constantly, so improve constantly the load of bearing shell, the requirement of lubricity.
Existing engine bearing, is generally smooth or in fluted body ripple struction from the internal surface of microcosmic bearing shell.From Elastic fluid theory and bionics fiber, surface of friction pair is not more smooth better, and surface of friction pair is too smooth, and when surface is oil-poor, be difficult to form oil film, form boundary friction even dry friction, enhance faster wear, makes Bearing Failure.And inner surface of bearing bush microstructure is when being fluted body ripple struction, the loading capacity of oil film appropriateness of bearing shell is improved, but groove structure makes ambient stress increase, and is unfavorable for the load of bearing shell, reduces the intensity of bearing shell.
Model utility content
The object of the invention is to overcome the deficiencies in the prior art, the bearing shell with internal surface microcellular structure that a kind of bearing capacity, lubrication effect that effectively can improve oil film obviously improves is provided.
The object of the present invention is achieved like this:
Have a bearing shell for surface microporous structure, comprise bearing shell body, the body comprises metal watt back of the body and antifriction alloy layer composition, wherein antifriction alloy layer is the friction layer between bearing shell and axle journal.It is characterized in that the internal surface of antifriction alloy layer is processed with microstructure.
Described microstructure is the micropore adopting laser micro-machining technology processing.
Described micropore is regularly arranged, and diameter is 150 μm ~ 200 μm, and the degree of depth is 35 μm ~ 50 μm.
The area sum of all micropores accounts for 4.5% ~ 5.5% of antifriction alloy layer inner surface area, and the shape of micropore is conical bore or cylindrical hole.
The present invention compared with prior art tool has the following advantages:
1, improve the minimum oil film thickness between bearing shell-axle journal, and compared with smooth surface structure, the existence of micropore makes lubricant oil be flowed by one-way planar and changes the multi-direction flowing of curved surface into, and increase by unit area flow, generation dynamic pressure effect, improves lubrication effect; The ripple struction of prior art or grooved brush, also have dynamic pressure effect, but micropore is more obvious to the squeezing effect of lubricant oil than grooved, ripple type, so dynamic pressure effect is stronger.
2, by the internal surface micropore of laser beam machining compared with the fluted body bored or ripple type, size is microcosmic more, and stress is concentrated less, and the intensity of bearing shell is almost unchanged.
3, internal surface micropore can oil storage cloth oil, can to surperficial multiple spot secondary fuel feeding when surface of friction pair is oil-poor, extends lubrication time.Because the micropore degree of depth is greater than groove or ripple type, oil storage better effects if.
4, bearing bush abrasion mostly comparatively is abrasive wear, and internal surface micropore can catch abrasive particle, reduces abrasive wear.
Accompanying drawing explanation
Fig. 1 is bearing shell overview of the present invention;
Figure 1A is the sectional view of Fig. 1;
Fig. 2 is inner surface of bearing bush view of the present invention;
Fig. 3 is the detailed view of the partial enlargement of Fig. 2;
Fig. 4 A and Fig. 4 B is the A-A sectional drawing of Fig. 3;
Fig. 5 A and Fig. 5 B is micropore enlarged diagram.
Embodiment
Below illustrate microcellular structure and the processing mode of this bearing shell:
See Fig. 1, Figure 1A, this bearing shell has bearing shell body 1, and body 1 is made up of the metal tile back of the body 3 and antifriction alloy layer 4, and wherein antifriction alloy layer 4 is the friction layer between bearing shell and axle journal.
See Fig. 2, Fig. 3, be processed with regularly arranged micropore 2 at the internal surface of antifriction alloy layer 4.Concrete processing method is:
Antifriction alloy layer 3 internal surface first on bearing shell body 1 applies one deck resin, and this resin is thin and easily remove.
Refill and sandwich inside semi-circular shape frock, adopting pulsed laser, can be preferably that Nd:YAG pulsed laser processes micropore at bearing shell.Wherein Nd:YAG pulsed laser major parameter has: (a) optical maser wavelength: 1064nm; (b) crystal: Nd:YAG, polarisation; The maximum single pulse energy of (c) Laser output: 40mJ ~ 50mJ; (d) laser pulse frequency: 40Hz ~ 50Hz; (e) laser pulse width: 90ns ~ 110ns.The high-energy high density pulse laser beam that Nd:YAG pulsed laser produces acts on material surface at equal intervals, and material is melted, and sputtering forms micropore 4 structure.When pulse laser beam is static, composite stepper motor accurately controls bearing shell linear displacement and angular displacement, obtains regularly arranged conical microwell array.
Finally remove surperficial one deck resin and polishing, just obtain smooth surface and there is the bearing shell of regularly arranged microcellular structure.
See Fig. 4 and Fig. 5, the shape of micropore 2 is can be conical bore, or cylindrical hole.Their diameter is preferably 150 μm ~ 200 μm, and the degree of depth is 35 μm ~ 50 μm, and the area sum of all micropores 2 accounts for antifriction alloy layer 4) inner surface area 4.5% ~ 5.5%.
Claims (6)
1. one kind has the bearing shell of surface microporous structure, comprise bearing shell body (1), body (1) carries on the back (3) by metal tile and antifriction alloy layer (4) forms, and it is characterized in that the internal surface of antifriction alloy layer (4) is processed with microstructure, this structure is obtained by following course of working:
Antifriction alloy layer (3) internal surface first on bearing shell body applies one deck resin;
Refill and sandwich in frock, adopt pulsed laser at antifriction alloy layer internal surface processing micropore, the high-energy high density pulse laser beam that pulsed laser is produced acts on antifriction alloy layer internal surface, material is melted, stepper motor accurately controls bearing shell linear displacement and angular displacement simultaneously, and sputtering obtains regularly arranged microwell array;
Described pulsed laser major parameter: (a) optical maser wavelength: 1064nm; (b) Laser output single pulse energy: 40mJ ~ 50mJ; (c) laser pulse frequency: 40Hz ~ 50Hz; (d) laser pulse width: 90ns ~ 110ns;
Finally remove surperficial one deck resin and polishing, obtain smooth surface and there is the bearing shell of regularly arranged microcellular structure.
2. the bearing shell with surface microporous structure according to claim 1, is characterized in that described microstructure is the micropore (2) adopting laser micro-machining technology processing.
3. the bearing shell with surface microporous structure according to claim 2, is characterized in that described micropore (2) is regularly arranged.
4. the bearing shell with surface microporous structure according to claim 2, it is characterized in that the diameter of described micropore (2) is 150 μm ~ 200 μm, the degree of depth is 35 μm ~ 50 μm.
5. the bearing shell with surface microporous structure according to claim 2, is characterized in that the area sum of all micropores (2) accounts for antifriction alloy layer (4)) inner surface area 4.5% ~ 5.5%.
6. the bearing shell with surface microporous structure according to claim 2, is characterized in that the shape of micropore (2) is conical bore or cylindrical hole.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201210049529.3A CN102537066B (en) | 2012-02-29 | 2012-02-29 | A kind of bearing shell and processing method with surface microporous structure |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201210049529.3A CN102537066B (en) | 2012-02-29 | 2012-02-29 | A kind of bearing shell and processing method with surface microporous structure |
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| Publication Number | Publication Date |
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| CN102537066A CN102537066A (en) | 2012-07-04 |
| CN102537066B true CN102537066B (en) | 2015-10-07 |
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Families Citing this family (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE102015223643B4 (en) * | 2015-11-30 | 2018-02-22 | Robert Bosch Gmbh | Method for producing a pendulum arrangement of a pendulum laser device and pendulum laser device |
| CN106282954A (en) * | 2016-11-10 | 2017-01-04 | 重庆跃进机械厂有限公司 | The processing method of copper-based alloy bearing bush compound work antifriction layer |
| CN106523529B (en) * | 2016-12-28 | 2018-09-07 | 哈尔滨工业大学 | A kind of method and rolling bearing manufacturing wear-resistant retainer using laser texturing |
| CN109854608B (en) * | 2019-01-19 | 2021-04-13 | 山东理工大学 | Dendritic distributed composite surface texture antifriction bearing bush |
| CN112303125B (en) * | 2020-11-02 | 2022-06-28 | 江苏科技大学 | Sliding bearing with micro-modeling on surface and preparation method thereof |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2365446Y (en) * | 1998-10-26 | 2000-02-23 | 北京市朝阳达威新技术实验厂 | Sliding component and bearing |
| CN1353205A (en) * | 2001-10-25 | 2002-06-12 | 中国科学院兰州化学物理研究所 | Self-lubricating composite metal material |
| CN102022434A (en) * | 2010-12-23 | 2011-04-20 | 浙江大学 | Sliding bearing with micro holes on inner wall thereof |
| CN202451605U (en) * | 2012-02-29 | 2012-09-26 | 重庆长安汽车股份有限公司 | Bearing bush with surface microvoid structure |
-
2012
- 2012-02-29 CN CN201210049529.3A patent/CN102537066B/en active Active
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2365446Y (en) * | 1998-10-26 | 2000-02-23 | 北京市朝阳达威新技术实验厂 | Sliding component and bearing |
| CN1353205A (en) * | 2001-10-25 | 2002-06-12 | 中国科学院兰州化学物理研究所 | Self-lubricating composite metal material |
| CN102022434A (en) * | 2010-12-23 | 2011-04-20 | 浙江大学 | Sliding bearing with micro holes on inner wall thereof |
| CN202451605U (en) * | 2012-02-29 | 2012-09-26 | 重庆长安汽车股份有限公司 | Bearing bush with surface microvoid structure |
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| CN102537066A (en) | 2012-07-04 |
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