CN103111752A - Method and device for forming micro-texture in composite mode on inner surface of cylinder sleeve through laser - Google Patents
Method and device for forming micro-texture in composite mode on inner surface of cylinder sleeve through laser Download PDFInfo
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- CN103111752A CN103111752A CN2013100131060A CN201310013106A CN103111752A CN 103111752 A CN103111752 A CN 103111752A CN 2013100131060 A CN2013100131060 A CN 2013100131060A CN 201310013106 A CN201310013106 A CN 201310013106A CN 103111752 A CN103111752 A CN 103111752A
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Abstract
The invention provides a method for forming micro-texture in a composite mode on the inner surface of a cylinder sleeve through laser. The method comprises the following steps: step (1), a femtosecond laser device is used for processing a needed microcosmic shape on the inner surface of the cylinder sleeve; and step (2), a nanosecond laser device is used for strengthening the area of the microcosmic shape processed in the step (1) through laser shock waves. Under the condition of dry friction, micro-concave surface texture can be used as a storage device for storing wear particles to reduce abrasive wear and furrows on the friction surface, and therefore the wear rate is lowered. The laser shock waves can eliminate residual tension after the micro-texture is formed on the inner surface of the cylinder sleeve, and therefore deep residual compressive stress is formed, grain refinement is enabled to be more uniform, the hardness, the abrasive resistance and the anti-fatigue performance of the cylinder sleeve are improved, and the service life of the cylinder sleeve is prolonged. The invention further provides a device for forming the micro-texture in the composite mode on the inner surface of the cylinder sleeve through the laser at the same time.
Description
Technical field
The invention belongs to laser micro-fabrication technology field, be specifically related to the method and apparatus of the compound little texture inner surface of cylinder liner of a kind of laser.
Background technology
The laser micro molding technology is a kind of easy to control, modernization processing method that efficient is high, utilization has the regular micro-geometrical structure of certain energy density (spacing), width, the degree of depth, angle, shape, so that form dynamic pressure fluid lubrication or elastohydrodynamic lubrication at surface of friction pair.Simultaneously, utilize the thermal effect benefit of laser, change metallographic structure, thereby reach in the lubricated anti-attrition of surface of friction pair and strengthen wear-resistant double effects.
The tribology behavior of friction pair had both affected service behaviour and the operational efficiency of machine, simultaneously also on very important impact is arranged its service life.Traditional surface engineering technology utilizes the Surface Finishing technology such as polishing, grinding to reduce the roughness of friction surface, thereby makes the surface smooth as far as possible, and by various process for treating surface, strengthens surface of friction pair, improves its hardness, in order to improve wearability.But these proprietary technologies have increased the complexity of parts machining technique, have improved manufacturing cost, and have certain limitation, because single technology can not be taken into account lubricated and wear-resisting requirement.
Summary of the invention
The present invention is directed to above-mentioned the deficiencies in the prior art, the method for the compound little texture inner surface of cylinder liner of a kind of laser is provided, can take into account lubricated and wear-resisting requirement, extend the service life of cylinder sleeve; The present invention also provides the device of the compound little texture inner surface of cylinder liner of a kind of laser simultaneously.
The present invention is achieved through the following technical solutions:
The method of the compound little texture inner surface of cylinder liner of a kind of laser comprises the following steps:
(1) utilize femto-second laser to process needed micro-geometrical structure at inner surface of cylinder liner;
(2) utilizing nanosecond laser to carry out laser blast wave to the microscopic appearance zone after step (1) processing strengthens.
The further setting of the present invention is, described in step (1), the detailed process of processing is:
(1.1) femto-second laser produces laser beam, and the laser beam II is directed to inner surface of cylinder liner under the guiding of light conducting cylinder, inner surface of cylinder liner is carried out the little texture of laser;
(1.2) after having beaten nick hole, control workbench and work piece holder is rotated to an angle continue to beat next nick hole, cheat until get a circle nick at inner surface of cylinder liner;
(1.3) control workbench and stop the rotation, and move a segment distance do feed motion, continue to make a call to a circle nick and cheat, until whole inner surface of cylinder liner processes needed micro-geometrical structure.
The further setting of the present invention is, when laser blast wave is strengthened water as restraint layer, pitch-dark as absorbed layer.
The present invention also provides the device of the compound little texture inner surface of cylinder liner of a kind of laser simultaneously, comprises the little texture light path part of laser, laser impact intensified light path part, control section and workbench;
The little texture light path part of laser comprises femto-second laser, 45 ° of total reflective mirror II, adjusting hot spot optical mirror slip II and light conducting cylinder II; The laser beam that femto-second laser produces is directed in cylinder sleeve under the guiding of light conducting cylinder II by regulating hot spot optical mirror slip II by 45 ° of total reflective mirror II reflections;
Laser impact intensified light path part comprises nanosecond laser, 45 ° of total reflective mirror I, hot spot optical mirror slip I, light conducting cylinder I, water injector and the pitch-dark devices of spraying; The laser beam that nanosecond laser produces by regulating hot spot optical mirror slip I, passes the water curtain of water injector ejection by 45 ° of total reflective mirror I reflections, is directed in cylinder sleeve under the guiding of light conducting cylinder I;
Described control section comprises the first Computer Control Unit and second computer control device, and the first Computer Control Unit is connected with the pitch-dark device of femto-second laser, nanosecond laser and spraying, and the second computer control device is connected with workbench with water injector.
the microscopic pockets that the present invention utilizes the femtosecond laser laser instrument to arrange by certain way in the cylinder sleeve Surface Machining, then take laser blast wave to strengthen microscopic pockets zone (generation residual compressive stress), be used for storage lubricating oil, when piston during at the cylinder sleeve surface sliding, be stored in the lubricating oil in these nicks holes, its flow and the flow direction are all undergone mutation, producing local differential pressure on microcosmic distributes, thereby accumulation forms the hydrodynamic effect on macroscopic view, produce the hydrodynamic lubrication oil film with certain thickness and bearing capacity between cylinder sleeve and piston ring, obviously improve the mechanical performance (residual stress on surface, hardness and roughness) and frictional behaviour.
The method of the compound little texture inner surface of cylinder liner of laser of the present invention has following beneficial effect:
(1) under DRY SLIDING, dimpled surface texture can be used as the holder that stores wear particle, abrasive wear and the ditch dug with a plow on the surface of reducing friction, thus reduce wear rate.
(2) under condition of boundary lubrication, the lubricating oil that is stored in texture is extruded due to wearing and tearing or the distortion on surface, forms squeeze film.
(3) the laser-impact parameter is accurately controlled, good reproducibility, and the effect of shock peening is even, need not after impact to process again.
(4) laser-impact can be eliminated the residual tension after the little texture of inner surface of cylinder liner, and the residual compressive stress that forms the degree of depth also makes grain refinement more even, has improved hardness, wearability, the anti-fatigue performance of cylinder sleeve, and is improved the service life of cylinder sleeve.
(5) the present invention has overcome single technology and can not take into account lubricated and wear-resisting requirement, can further improve lubricity and the wear resistance of Studies of Piston Ring/Bore Pair surface of friction pair, improves its service life.
Description of drawings
Fig. 1 is the device schematic diagram of the compound little texture inner surface of cylinder liner of laser;
In figure, 1. 3.45 ° of total reflective mirror I of nanosecond laser 2. laser beam I 4. regulate the hot spot optical mirror slip I 5. water injector 6. water curtain 7. light conducting cylinder I 8. pitch-dark device 9. fixture 10. workbench 11. cylinder sleeve 12. light conducting cylinder II 13. of spraying and regulate 15.45 ° of total reflective mirror II of hot spot optical mirror slip II 14. second computer control device, 16. laser beam II 17. femto-second laser 18. first Computer Control Units.
The specific embodiment
Describe details and the working condition of the concrete device of the present invention's proposition in detail below in conjunction with accompanying drawing.
The regular micro-geometrical structure that at first method of the present invention adopts femto-second laser to have certain density (spacing), width, the degree of depth, angle and shape in cylinder sleeve surface preparation, then use laser blast wave intensive treatment micro-geometrical structure regional, process the microstructure of needed shape and arrangement at inner surface of cylinder liner.
Figure 1 shows that the device schematic diagram of the compound little texture inner surface of cylinder liner of laser, comprise the little texture light path part of laser, laser impact intensified light path part, control section and workbench 10; The little texture light path part of laser comprises femto-second laser 17,45 ° of total reflective mirror II 15, adjusting hot spot optical mirror slip II 13 and light conducting cylinder II 12; By regulating hot spot optical mirror slip II 13, laser beam II 16 is directed to cylinder sleeve 11 surfaces to the laser beam II 16 that femto-second laser 17 produces under the guiding of light conducting cylinder II 12 by 15 reflections of 45 ° of total reflective mirror II; Laser impact intensified light path part comprises nanosecond laser 1,45 ° of total reflective mirror I3, hot spot optical mirror slip I4, light conducting cylinder I7, water injectors 5 and sprays pitch-dark device 8; Nanosecond laser produces laser beam I2, and then laser beam I2 by regulating hot spot optical mirror slip I, passes the water curtain 6 of water injector 5 ejections by 45 ° of total reflective mirror I3 reflections, and final laser beam I2 is directed to cylinder sleeve 11 under the guiding of light conducting cylinder I7; Described control section comprises the first Computer Control Unit 18 and second computer control device 14, the first Computer Control Unit 18 is with femto-second laser 17, nanosecond laser 1 and spray pitch-dark device 8 and be connected, second computer control device 14 with control water injector 5 and be connected with workbench 10.
The concrete steps of the little texture of laser are: in the first Computer Control Unit 18, the required parameter of input makes femto-second laser 17 produce laser beam II 16, wherein femtosecond laser is with its ultrashort and superpower characteristics, have unique materials processing characteristic, can carry out the removal processing of material within the extremely short time, thereby guarantee crudy.then laser beam II 16 passes through to regulate hot spot optical mirror slip II 13 by 15 reflections of 45 ° of total reflective mirror II, laser beam II 16 is directed to cylinder sleeve 11 surfaces the little texture of laser is carried out on cylinder sleeve 11 surfaces under the guiding of light conducting cylinder II 12, second computer control device 14 is controlled workbench 10 and work piece holder 9 is rotated to an angle continue to beat next nick and cheat after having beaten nick hole, stop the rotation until get a circle nick hole workbench 10 at inner surface of cylinder liner, second computer control device 14 is controlled workbench 10 and is moved a segment distance do feed motion subsequently, continue to make a call to a circle nick hole and cheat array until whole cylinder sleeve 11 inner surfaces process needed nick.
Spraying pitch-dark concrete steps is: second computer control device 14 is controlled workbench 10 and is moved to assigned address, and simultaneously the first Computer Control Unit 18 is controlled 8 pairs, the pitch-dark device of spraying cylinder sleeve 11 surfaces and sprayed the pitch-dark absorbed layer of doing.In the time of spraying, second computer control device 14 control workbench 10 rotate and feed motion, make in whole cylinder sleeve 11 inner surfaces sprayings pitch-dark uniformly.
laser impact intensified concrete steps are: second computer control device 14 major control workbench 10 and water injector 5, the required parameter of input makes nanosecond laser 1 produce laser beam I2 in the first Computer Control Unit 18, laser beam I2 is by 45 ° of total reflective mirror I3 reflections, then by regulating hot spot optical mirror slip I, pass the water curtain 6 of water injector 5 ejections, final laser beam I2 is directed to cylinder sleeve 11 surfaces and inner surface is done laser impact intensified processing under the guiding of light conducting cylinder I7, make the pitch-dark vaporization on cylinder sleeve 11 surfaces, ionization forms shock wave, the purpose that plastic deformation reaches laser reinforcing occurs in cylinder sleeve 11 under the effect of shock wave.Whenever laser-impact once after second computer control device 14 control workbench 10 and work piece holder 9 rotated to an angle continue to impact once, stop the rotation until impact a circle aftertable 10 at cylinder sleeve 11 inner surface lasers, second computer control device 14 is controlled workbench 10 and is moved a segment distance do feed motion subsequently, continues next circle of laser-impact until whole cylinder sleeve 11 inner surface laser shock peenings are complete.
The concrete implementation step of the method on the compound little texture cylinder sleeve of laser surface is as follows:
(1) according to piston top layer machining area requirement, generate machining locus by the first Computer Control Unit 18 programmings, determine the technological parameters such as laser spot diameter and energy.
(2) utilize hot spot to regulate the dimensional energy distribution of optical mirror slip I, II control laser facula, make outgoing laser beam I, II spatially evenly distribute.
(3) at first utilize second computer control device 14 to control femto-second laser 17 and produce laser beam II 16, laser beam II 16 is cheated at cylinder sleeve 11 inner surface processing nicks by light conducting cylinder II 12, when the processing nick was cheated, cylinder sleeve 11 was done rotation slowly on fixture 9.
(4) when laser beam II 16 after cylinder sleeve 11 inner surfaces process a circle nick hole, the five axle workbench certain distance that slides left, then laser beam II 16 continues to process a circle nick hole at cylinder sleeve 11 inner surfaces, makes at last whole cylinder sleeve 11 inner surfaces process needed microcosmic moulding.
(5) after micro forming is completed, second computer control device 14 is controlled workbench 10 and is moved to assigned address, the first Computer Control Unit 18 is controlled 8 pairs of cylinder sleeve 11 inner surfaces of the pitch-dark device of spraying and is evenly sprayed, and carries out laser impact intensified experiment after aeration-drying
(6) utilize second computer control device 14 to control workbench 10 and move to assigned address and open water injector 5, then control the micro-geometrical structure zone on nanosecond laser 1 shock peening cylinder sleeve surface by the first Computer Control Unit 18.
(7) use water as restraint layer, the pitch-dark absorbed layer of doing shines by restraint layer when laser beam on piston face pitch-dark, causes that pitch-dark vaporization, ionization form shock wave, plastic deformation occurs in piston face under the effect of shock wave, namely reach the shock peening effect.
Claims (4)
1. the method for the compound little texture inner surface of cylinder liner of laser, is characterized in that, comprises the following steps:
(1) utilize femto-second laser to process needed micro-geometrical structure at inner surface of cylinder liner;
(2) utilizing nanosecond laser to carry out laser blast wave to the microscopic appearance zone after step (1) processing strengthens.
2. the method for the compound little texture inner surface of cylinder liner of a kind of laser according to claim 1, is characterized in that, described in step (1), the detailed process of processing is:
(1.1) femto-second laser produces laser beam, and the laser beam II is directed to inner surface of cylinder liner under the guiding of light conducting cylinder, inner surface of cylinder liner is carried out the little texture of laser;
(1.2) after having beaten nick hole, control workbench and work piece holder is rotated to an angle continue to beat next nick hole, cheat until get a circle nick at inner surface of cylinder liner;
(1.3) control workbench and stop the rotation, and move a segment distance do feed motion, continue to make a call to a circle nick and cheat, until whole inner surface of cylinder liner processes needed micro-geometrical structure.
3. the method for the compound little texture inner surface of cylinder liner of a kind of laser according to claim 1, is characterized in that, when laser blast wave is strengthened water as restraint layer, pitch-dark as absorbed layer.
4. the device of the compound little texture inner surface of cylinder liner of laser, is characterized in that, comprises the little texture light path part of laser, laser impact intensified light path part, control section and workbench;
The little texture light path part of laser comprises femto-second laser, 45 ° of total reflective mirror II, adjusting hot spot optical mirror slip II and light conducting cylinder II; The laser beam that femto-second laser produces is directed in cylinder sleeve under the guiding of light conducting cylinder II by regulating hot spot optical mirror slip II by 45 ° of total reflective mirror II reflections;
Laser impact intensified light path part comprises nanosecond laser, 45 ° of total reflective mirror I, hot spot optical mirror slip I, light conducting cylinder I, water injector and the pitch-dark devices of spraying; The laser beam that nanosecond laser produces by regulating hot spot optical mirror slip I, passes the water curtain of water injector ejection by 45 ° of total reflective mirror I reflections, is directed in cylinder sleeve under the guiding of light conducting cylinder I;
Described control section comprises the first Computer Control Unit and second computer control device, and the first Computer Control Unit is connected with the pitch-dark device of femto-second laser, nanosecond laser and spraying, and the second computer control device is connected with workbench with water injector.
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| CN2013100131060A CN103111752A (en) | 2013-01-14 | 2013-01-14 | Method and device for forming micro-texture in composite mode on inner surface of cylinder sleeve through laser |
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| CN2013100131060A CN103111752A (en) | 2013-01-14 | 2013-01-14 | Method and device for forming micro-texture in composite mode on inner surface of cylinder sleeve through laser |
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Cited By (11)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN103290178A (en) * | 2013-06-20 | 2013-09-11 | 江苏大学 | Hidden surface laser impact strengthening method and apparatus thereof |
| CN106435158A (en) * | 2016-10-09 | 2017-02-22 | 南通大学 | Workpiece surface laser shocking process utilizing surface micro textures for removing residual stress holes |
| CN106480304A (en) * | 2017-01-03 | 2017-03-08 | 中国矿业大学 | A kind of micro- stress peening method of micro- texture surface selective laser |
| CN110337346A (en) * | 2017-02-24 | 2019-10-15 | 斯塔比卢斯有限责任公司 | The production equipment of the manufacturing method of damping hole piston, damper, damping hole piston, the production method of damper and damper |
| CN110508928A (en) * | 2019-09-02 | 2019-11-29 | 江苏科技大学 | A kind of jewel inhibits the processing unit (plant) and method of crack propagation |
| CN110983228A (en) * | 2019-12-25 | 2020-04-10 | 广东省新材料研究所 | Tungsten carbide coating with surface microstructure, preparation method and application thereof, and workpiece with coating |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN103290178A (en) * | 2013-06-20 | 2013-09-11 | 江苏大学 | Hidden surface laser impact strengthening method and apparatus thereof |
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| CN110337346B (en) * | 2017-02-24 | 2021-10-15 | 斯塔比卢斯有限责任公司 | Damper manufacturing method and damper production equipment |
| CN110337346A (en) * | 2017-02-24 | 2019-10-15 | 斯塔比卢斯有限责任公司 | The production equipment of the manufacturing method of damping hole piston, damper, damping hole piston, the production method of damper and damper |
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| CN110508928A (en) * | 2019-09-02 | 2019-11-29 | 江苏科技大学 | A kind of jewel inhibits the processing unit (plant) and method of crack propagation |
| CN110983228A (en) * | 2019-12-25 | 2020-04-10 | 广东省新材料研究所 | Tungsten carbide coating with surface microstructure, preparation method and application thereof, and workpiece with coating |
| CN111485094A (en) * | 2020-04-23 | 2020-08-04 | 江苏大学 | Device and method for strengthening inner wall and outer wall of metal pipe through laser shock |
| CN113280115A (en) * | 2021-06-24 | 2021-08-20 | 青岛理工大学 | Micro-texture piston ring and processing method |
| RU2777793C1 (en) * | 2021-09-13 | 2022-08-10 | федеральное государственное бюджетное образовательное учреждение высшего образования «Кузбасский государственный технический университет имени Т.Ф. Горбачева» (КузГТУ) | Method for laser surface treatment of steel products |
| CN113913605A (en) * | 2021-10-13 | 2022-01-11 | 中国航空制造技术研究院 | Composite strengthening method for femtosecond laser superposed nanosecond laser impact |
| CN115143225A (en) * | 2022-06-29 | 2022-10-04 | 中国矿业大学 | Pneumatic vibration damper for eliminating static friction of mobile platform |
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Application publication date: 20130522 |