CN105132667B - A kind of method of gear surface laser-impact micro forming - Google Patents
A kind of method of gear surface laser-impact micro forming Download PDFInfo
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- CN105132667B CN105132667B CN201510616364.7A CN201510616364A CN105132667B CN 105132667 B CN105132667 B CN 105132667B CN 201510616364 A CN201510616364 A CN 201510616364A CN 105132667 B CN105132667 B CN 105132667B
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Abstract
The invention discloses a kind of method of gear surface laser-impact micro forming, comprise the following steps：(1) gear teeth face is polished, and with alcohol washes gear teeth face, after drying, uniformly sprayed pitch-dark in 1/3 crest top land to 1/3 root face region close to nodel line；(2) it is tight that gear is carried out to locating clip on workbench, laser parameter is set, laser beam is radiated at the gear teeth face anticipated by condenser lens and forms nick hole；(3) combining with digital control workbench processes a series of micro- pit arrays in gear surface；(4) to remove gear teeth face with acetone pitch-dark and clean gear teeth face with ultrasonic wave.The present invention belongs to cold working surface treatment using laser-impact micro forming technology, to the flank of tooth without heat affecting；Dimple size is micron level, does not influence the intensity of gear tooth.The gear handled through laser-impact micro forming is compared with currently common gear, and the coefficient of friction of gear teeth face is obviously reduced, and hardness and wearability significantly improve.
Description
Technical field
The invention belongs to gear surface intensive treatment technology, refers in particular to a kind of method of gear surface laser-impact micro forming.
Background technology
Gear drive is a kind of type of belt drive being most widely used in machine driving.Because gear drive is relatively accurate, effect
The advantages that rate is high, compact-sized, reliable operation is widely used in the neck such as Aero-Space, national defence, bullet train, microelectronics
Domain.Rippling, flank of tooth flow, tooth face agglutination, tooth surface abrasion easily occur for the flank of tooth in Meshing Process of Spur Gear near reference circle
Deng having had a strong impact on gear-driven stability and transmission performance.The quality of gear directly affects the matter of whole transmission system
Amount and the life-span, therefore study high efficiency, high quality, low cost, easy to operate, controllability is strong, free of contamination gear intensifying method tool
There are high application prospect and economic value.
Mainly there are gear surface carburizing, nitridation technique, reiforcing laser impact technology, thermal jet in the current method for strengthening gear
Painting technology and current emerging laser quenching technology, ultrasonic deep-rolling technology etc., all in the presence of it is certain the shortcomings that.Such as Carburization Treatment temperature
Degree is high, and deformation is big, and surface quality is low.Gear teeth face roughness after reiforcing laser impact technology processing is poor, thereby increases and it is possible to can shadow
The intensity to gear tooth is rung, as Jiangsu University appoints device and the side of a kind of Xu Dong underwater laser shock peening gear pump gear
Method (the patent No.：201310384126.9).Although the gear surface smoothness that ultrasonic deep-rolling technology obtains is preferable, processed
The abrasion of journey is still difficult to control.
The content of the invention
Goal of the invention：In order to solve the deficiency in current techniques, a kind of gear surface laser-impact of present invention offer is micro- to be made
The method of type, the technology belong to surface cold work, can effectively improve the hardness of gear teeth face, reduce coefficient of friction, carry
High-wear resistance.
Technical scheme：To achieve the above object, a kind of method of gear surface laser-impact micro forming of the present invention, the processing
Device includes laser, condenser lens, nozzle and numerical control table, NC table, comprises the following steps：
(1) gear teeth face is polished, and with alcohol washes gear teeth face, then uniformly sprayed pitch-dark close to nodel line
1/3 crest top land to 1/3 root face region；
(2) gear is installed on numerical control table, NC table, water constraint layer is set on pitch-dark surface, pulse laser parameter is set,
Laser beam transparent condenser lens is radiated at the gear teeth face anticipated and forms small hemispherical nick hole, and pit diameter is in 100-
300 μm, 1-40 μm of pit depth；
(3) by controlling numerical control table, NC table, a series of micro- pit arrays are processed in pretreated gear teeth face；
(4) to remove gear teeth face with acetone pitch-dark and clean gear teeth face with ultrasonic wave.
Preferably：Water constraint layer thickness in the step (2) is 3mm.
Preferably：The parameter of laser is optical maser wavelength 532nm in the step (2), pulsewidth 8ns, pulse
Laser energy 0J<E<2J, spot diameter 0mm<D≤1mm, 1~10Hz of frequency.
Preferably：In the step (3),
A. workbench moves along Gear axis direction in single track laser-impact micro forming is carried out；
B. step A is completed, and numerical control table, NC table turns over the angle of a tooth with moving gear around axis；
C. repeat step A, B, until each tooth carries out one of laser-impact micro forming；
D. numerical control table, NC table band moving gear moves a micro forming spacing, repeat step C along gear radial direction；
E. repeat step D, until laser-impact micro forming is completed in the same lateral tooth flank micro forming region of gear.
F. reversely installation after gear is pulled down, repeat step E, until laser is completed in the same lateral tooth flank micro forming region of gear
Impact micro forming.
Preferably：Micro forming spacing is 0 to the hot spot stated in step A vertically<L<3d, step D are radially micro-
Moulding spacing is 0<L<3d, d are spot diameter.
In the present invention, the gear that laser-impact micro forming is strengthened, the hardness of gear teeth face can be significantly improved, reduce friction
Coefficient, anti-wear performance is improved, improve the greasy property in Meshing Process of Spur Gear, reduce generation and the abrasive particle of gear abrasive particle
The possibility of the abrased gear flank of tooth is scraped, improves the life-span of gear.Laser-impact micro forming region of the present invention, is easy
Occur rippling, flank of tooth flow, tooth face agglutination, tooth surface abrasion close nodel line 1/3 crest top land to 1/3 root face region,
Process a series of micro- pit arrays.The present invention can effectively improve gear teeth face hardness, reduce coefficient of friction, improve it is wear-resisting
Performance, and can also effectively improve the intensity of the gear teeth
The principle of the present invention：The area of rippling, flank of tooth flow, tooth face agglutination, tooth surface abrasion easily occurs in gear teeth face
Domain carries out laser-impact micro forming, and the region coefficient of friction of micro forming reduces, and coating metal crystal grain is refined, and hardness improves,
Residual compressive stress is supervened on surface, and anti-wear performance is improved.Secondly nick hole caused by tooth surface laser impact micro forming
Caused abrasive particle in Meshing Process of Spur Gear can be caught, reduces gear teeth face abrasive wear.When gear works under lubricating condition,
Caused nick hole can store lubricating oil, increase lubrication, prevent dry engagement, reduce abrasion.Can be effective by the present invention
The hardness of gear teeth face is improved, reduces coefficient of friction, improves wearability.
Beneficial effect：The gear surface laser-impact micro molding process of the present invention, compared with prior art, have following excellent
Point：
1. the present invention belongs to cold working surface treatment using laser-impact micro forming technology, to the flank of tooth without heat affecting.
2. the gear teeth face that laser-impact micro forming is strengthened, tooth face hardness and anti-wear performance significantly improve.The raising of hardness
The effective generation for inhibiting rippling, flank of tooth flow, tooth face agglutination.
3. laser-impact micro forming can effectively catch abrasive particle in nick hole caused by gear teeth face, gear teeth face is prevented
Abrasive wear.
4. nick hole can store lubricating oil caused by laser-impact micro forming, the production of dry friction when gear engages is prevented
It is raw, reduce abrasion.
5. gear teeth face laser-impact micro forming region coefficient of friction reduces.Caused nick hole is in micron level, not shadow
Ring the intensity of gear tooth.
Brief description of the drawings
Fig. 1 is the principle schematic of the present invention；
Fig. 2 is the structural representation of the finished gear teeth face of the present invention；
Fig. 3 is the processing unit (plant) schematic diagram of the present invention.
Embodiment
The present invention is further described below in conjunction with the accompanying drawings.
As shown in Figure 1 to Figure 3, principle of the invention：Gear 5 is installed on workbench 11, the top of gear 5 is provided with laser
Device 10, the laser beam 2 that laser 10 is launched are radiated on gear 5 by condenser lens 1.Gear tooth is sequentially provided with energy on surface
Absorbed layer 4 and restraint layer 3 are measured, induces shock wave 7 to form nick hole 6 in the tooth surface of gear 5 by laser beam 2.
As shown in figure 3, the processing unit (plant) of the present invention includes laser 10, condenser lens 1 and numerical control table, NC table 11, laser
10 laser beams 2 occurred are radiated at the laser-impact micro forming region 9 of the gear teeth face 8 on workbench 11 by condenser lens 1,
The surface of gear teeth face micro forming region 9 is provided with energy-absorbing layer pitch-dark 4 and water constraint layer 3.
A kind of method of gear surface laser-impact micro forming, comprises the following steps：
(1) gear teeth face is polished, and gear teeth face is wiped with alcohol washes, then uniformly sprayed pitch-dark close
1/3 crest top land of nodel line is to 1/3 root face region, i.e., close to the crest top land of nodel line with 1/3 region in nodel line region and close to section
The root face of line and 1/3 region in nodel line region；
(2) gear is installed on numerical control table, NC table, water constraint layer is set on pitch-dark surface, pulse laser parameter is set,
Optical maser wavelength 532nm, pulsewidth 8ns, single-pulse laser energy 0J<E<2J, spot diameter 0mm<D≤1mm, 1~10Hz of frequency.Swash
Light beam by condenser lens 1 be irradiated to the flank of tooth it is pitch-dark on produce nick cheat, nick hole be shaped as small hemispherical, pit diameter
At 100-300 μm, 1-40 μm of pit depth；
(3) by controlling numerical control table, NC table, a series of micro- pit arrays are gone out in Gear shape process, the flank of tooth after machining is such as
Gear teeth face micro forming region 9 shown in Fig. 2, a series of pit is formed in gear surface.
It can be comprised the following steps that with the following method in step (3)：
A. workbench moves along gear axial direction in single track laser-impact micro forming is carried out；
B. step A is completed, and numerical control table, NC table turns over the angle of a tooth with moving gear around axis；
C. repeat step A, B, until each tooth carries out one of laser-impact micro forming；
D. numerical control table, NC table band moving gear moves a micro forming spacing, repeat step C along gear radial direction；
E. repeat step D, until laser-impact micro forming is completed in the same lateral tooth flank micro forming region of gear.
F. reversely installation after gear is pulled down, repeat step E, until laser is completed in the same lateral tooth flank micro forming region of gear
Impact micro forming.
(4) it is pitch-dark to remove gear surface, and gear is cleaned with supersonic wave cleaning machine.
Described above is only the preferred embodiment of the present invention, it should be pointed out that：For the ordinary skill people of the art
For member, under the premise without departing from the principles of the invention, some improvements and modifications can also be made, these improvements and modifications also should
It is considered as protection scope of the present invention.
Claims (2)
1. the method for gear surface laser-impact micro forming, the processing unit (plant) of this method includes pulse laser, condenser lens, spray
Mouth and numerical control table, NC table, comprise the following steps：
(1) gear teeth face is polished, and with alcohol washes gear teeth face, then uniformly sprayed pitch-dark close to the 1/ of nodel line
3 crest top lands to 1/3 root face region；
(2) gear is installed on numerical control table, NC table, water constraint layer is set on pitch-dark surface, pulse laser parameter is set, is swashed
Light beam is radiated at the gear teeth face anticipated through condenser lens and forms small hemispherical nick hole, and pit diameter is in 100-
300 μm, 1-40 μm of pit depth, the small hemispherical nick hole catches caused abrasive particle in Meshing Process of Spur Gear, and then reduces
The abrasive wear of gear teeth face；Wherein laser parameter is：Optical maser wavelength 532nm, pulsewidth 8ns, single-pulse laser energy 0J ＜ E ＜
2J, spot diameter 0mm ＜ d≤1mm, 1~10Hz of frequency；
(3) by controlling numerical control table, NC table, a series of micro- pit arrays are processed in pretreated gear surface；Process nick
Hole array comprises the following steps：
A. workbench moves along Gear axis direction in single track laser-impact micro forming is carried out；And the hot spot of Laser emission is along axle
Line direction micro forming spacing L is 0 ＜ L ＜ 3d；
B. after the completion of step A, numerical control table, NC table turns over the angle of a tooth with moving gear around axis；
C. repeat step A, B, until each tooth carries out one of laser-impact micro forming；
D. numerical control table, NC table band moving gear moves a micro forming spacing, repeat step C along gear radial direction；And radially micro- make
Type spacing is 0 ＜ L ＜ 3d；
E. repeat step D, until laser-impact micro forming is completed in the same lateral tooth flank micro forming region of gear；
F. reversely installation, repeat step E after gear is pulled down, until gear the same side (other side) flank of tooth micro forming region is complete
Into laser-impact micro forming；
Wherein, step A, d is laser spot diameter in step D；
(4) to remove gear teeth face with acetone pitch-dark and clean gear teeth face with ultrasonic wave.
2. the method for gear surface laser-impact micro forming according to claim 1, it is characterised in that：The step (2)
In water constraint layer thickness be 3mm.
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| CN105671250B (en) * | 2016-03-24 | 2017-12-05 | 中国林业科学研究院木材工业研究所 | A kind of saw blade laser-impact tensioned device and method |
| CN106122447A (en) * | 2016-07-20 | 2016-11-16 | 西安理工大学 | A kind of belt pulley and the preparation method of belt pulley |
| CN107138866A (en) * | 2017-05-26 | 2017-09-08 | 江苏中科大港激光科技有限公司 | A kind of micro- texturing process method of laser for rotary digging tooth taper surface strengthening |
| CN107805705A (en) * | 2017-11-28 | 2018-03-16 | 广东工业大学 | A kind of method and system for strengthening gear part |
| CN112708752A (en) * | 2020-12-15 | 2021-04-27 | 华南理工大学 | Method and device for strengthening gear surface through laser shot blasting |
| CN114686678B (en) * | 2022-04-24 | 2024-01-05 | 江苏大学 | Laser impact combined strengthening device and method for gear |
| CN114799532B (en) * | 2022-05-09 | 2023-01-24 | 吉林大学 | Method for preparing high-quality amorphous alloy micro-pits by combining laser irradiation with wax sealing polishing |
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| CN102962656A (en) * | 2012-11-09 | 2013-03-13 | 江苏大学 | Compound model processing method and device for cutter |
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| CN101318262A (en) * | 2008-06-25 | 2008-12-10 | 江苏大学 | Laser micro-modelling method for cam surface profile |
| CN101376176A (en) * | 2008-09-19 | 2009-03-04 | 江苏大学 | Micro-molding finial on surface prepared by laser and preparation method thereof |
| CN102626826B (en) * | 2012-04-26 | 2015-02-04 | 江苏大学 | High efficiency apparatus and method based on laser shock wave for manufacturing micro grooves |
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| CN102962656A (en) * | 2012-11-09 | 2013-03-13 | 江苏大学 | Compound model processing method and device for cutter |
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