CN109175709A - A kind of pair of metal plate coating carries out the method and system of ps pulsed laser and ns pulsed laser removing - Google Patents
A kind of pair of metal plate coating carries out the method and system of ps pulsed laser and ns pulsed laser removing Download PDFInfo
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- CN109175709A CN109175709A CN201810962414.0A CN201810962414A CN109175709A CN 109175709 A CN109175709 A CN 109175709A CN 201810962414 A CN201810962414 A CN 201810962414A CN 109175709 A CN109175709 A CN 109175709A
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- pulsed laser
- coating
- metal plate
- laser
- stripped
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23K—SOLDERING OR UNSOLDERING; WELDING; CLADDING OR PLATING BY SOLDERING OR WELDING; CUTTING BY APPLYING HEAT LOCALLY, e.g. FLAME CUTTING; WORKING BY LASER BEAM
- B23K26/00—Working by laser beam, e.g. welding, cutting or boring
- B23K26/36—Removing material
Abstract
The invention discloses the method and systems that a kind of pair of metal plate coating carries out ps pulsed laser and ns pulsed laser removing, the above method is specially, the laser beam that nanosecoud pulse laser issues is emitted by two-dimensional scanning mirrors to coating surface to be stripped, coating to be stripped generates explosive frit reaction after passing through ps pulsed laser and ns pulsed laser ablation, and is detached from metal plate under the drive for the high-speed flow that coating surface generates；Above system includes the nanosecond laser set gradually, energy-transmission optic fibre, collimation head and two-dimensional scanning mirrors, and the laser beam that the nanosecond laser issues successively passes through energy-transmission optic fibre, collimation head and two-dimensional scanning mirrors and emits to metal plate coating surface to be stripped.Stripping means provided by the present invention has more environmentally-friendly, process control, precision and the more low advantage of more efficient and cost compared with existing stripping means, and provided system design science is ingenious and structurally reasonable, has a extensive future.
Description
Technical field
The present invention relates to the application fields of laser technology, carry out nanosecond arteries and veins more particularly, to a kind of pair of metal plate coating
The method and system of impulse photospallation.
Background technique
In order to realize the lightweight of body of a motor car, improve rigidity of the body structure in terms of bending and torsion, by heat at
High-strength steel after type technical treatment is widely used in the automotive industry；But the temperature of thermoforming process is up to 900 DEG C, high temperature meeting
Make steel plate that serious corrosiveness occur.This effect generates in order to prevent, and the prior art mostly uses the table in high-strength steel steel plate
Layer plating Al-Si coating process, Al-Si coating is with good stability under thermoforming high temperature achieved, to substrate of steel plate
With good antisepsis.
Although Al-Si coating has good protective effect to high-strength steel substrate of steel plate, the welding of substrate can be generated not
Good influence.If if not removing removing coating before welding, coating can melt and enter in molten bath at high temperature, it is distributed in molten bath
In different location；Moreover, local segregation phenomenon can occur for Al element and Si element in process of setting, it is in optics metallographic
Reveal grayish tissue topography, which belongs to brittlement phase, so that weld seam is easy to happen brittle fracture here, causes to weld
The adverse consequences that the tensile property of plate is decreased obviously afterwards, so that the overall performance to component generates serious adverse effect, because
This removes two-sided welding position coating before the welding of Al-Si coating high strength steel plate and is just particularly important.
Al-Si coating uses the usually more difficult removal of mechanical means, and such as being forced using granule impact makes coating cracking, and is easy
Mechanical damage is caused to substrate；It goes removing coating that excessive erosion easily occurs using compared with strong inorganic acid, reduces substrate section, cause reduction by zero
The adverse consequences of part mechanical property, and the NH in solution4 +、Mo7O24 6-And Cr2O7 2-Equal harmful ions are dealt with improperly and can seriously be polluted
Environment；Coat of aluminide is removed using the complicated acid mixed solution of organic sulfonic acid, inorganic acid and other oxidations, go back original reagent, so
Corrosion product is removed with the acetic acid of heating afterwards, but this method is too complicated, and inefficiency；Laser ablation coating is used at present
Method need Shang kilowatt laser power, and serious fuel factor can occur during removing coating, can be to needs
The performance that thermoforming handles substrate generates unacceptable serious influence, and cost is very high.
In conclusion how on existing Research foundation, exploitation designs a kind of cleaning section, position and thickness can be accurate
Control and the lower-cost method and system that ps pulsed laser and ns pulsed laser removing is carried out to metal plate coating, to meet the prior art pair
The removing requirement of the controllable precise high efficiency, low cost of aluminium silicon coating, has important theoretical and practical significance.
Summary of the invention
In view of the deficiencies of the prior art, the present invention provides a kind of pair of metal plate coatings to carry out ps pulsed laser and ns pulsed laser removing
Method and system.
The method that a kind of pair of metal plate coating carries out ps pulsed laser and ns pulsed laser removing is provided according to an aspect of the present invention, will be received
The laser beam that pulse per second (PPS) laser issues is emitted by two-dimensional scanning mirrors to coating surface to be stripped, and coating to be stripped is logical
Explosive frit reaction is generated after crossing ps pulsed laser and ns pulsed laser ablation, and is detached under the drive for the high-speed flow that coating surface generates
Metal plate.
In the above-mentioned technical solutions, the method also includes after ps pulsed laser and ns pulsed laser ablation coating to be stripped, adjustment is received
The frequency of pulse per second (PPS) laser by the oxide Quick-gasifying generated after release coating and is detached from metal plate.
Further, in the above-mentioned technical solutions, the ps pulsed laser and ns pulsed laser is infrared light, visible light or ultraviolet light, institute
State ps pulsed laser and ns pulsed laser ablative coating pulse width, repetition rate and mean power be respectively 30-400ns, 2-50KHz and
180-200W。
Further, in the above-mentioned technical solutions, the pulse width of the ps pulsed laser and ns pulsed laser gasification oxide, repetition frequency
Rate and mean power are respectively 30-400ns, 2-50KHz and 2-15W.
Still further, in the above-mentioned technical solutions, the movement of the laser beam on a metal plate is two-dimensional scanning vibration
The linear movement of the scanning and metal plate of mirror is superimposed.
Further, in the above-mentioned technical solutions, the two-dimensional scanning mirrors are helical scanning.
Specifically, in the above-mentioned technical solutions, the two-dimensional scanning mirrors scanning speed is 900-1200mm/s, and scanning is wide
Degree is 3-6mm.
Specifically, in the above-mentioned technical solutions, the speed of the metal plate linear movement is 2-5mm/s.
In the above-mentioned technical solutions, the laser beam emits straight to the hot spot formed on the coating surface to be stripped
Diameter is not more than 200 μm.
In the above-mentioned technical solutions, the metal plate is high strength steel plate, and the coating to be stripped is with a thickness of 15-35 μm
Aluminium silicon coating.
The system that a kind of pair of metal plate coating carries out ps pulsed laser and ns pulsed laser removing is provided according to a further aspect of the invention, packet
Include the nanosecond laser set gradually, energy-transmission optic fibre, collimation head and two-dimensional scanning mirrors, the laser that the nanosecond laser issues
Light beam successively passes through energy-transmission optic fibre, collimation head and two-dimensional scanning mirrors and emits to metal plate coating surface to be stripped.
Advantages of the present invention:
(1) method of ps pulsed laser and ns pulsed laser stripping metal plate coating provided by the present invention, relative to traditional machinery stripping
For the method with chemical stripping, more environmentally-friendly, process control, precision and more efficient, and swash used by stripping process
The mean power of light is 180-200W, compared with the method for the laser lift-off of multikilowatt used in the prior art, cost
It substantially reduces；
(2) method of ps pulsed laser and ns pulsed laser stripping metal plate coating provided by the present invention, by by two-dimensional scanning mirrors
Control is helical scanning, while the linear movement of complexed metal plate can effectively improve painting under the premise of guaranteeing peeling effect
The charge stripping efficiency of layer, while can avoid the generation of zebra-stripe；
(3) the system design science of ps pulsed laser and ns pulsed laser stripping metal plate coating provided by the present invention is ingenious, and structure is closed
Reason has wide applicability, has a extensive future.
Detailed description of the invention
Fig. 1 is the method schematic diagram for carrying out ps pulsed laser and ns pulsed laser removing in the embodiment of the present invention to metal plate coating；
Fig. 2 is the spiral shell for carrying out the two-dimensional scanning mirrors of ps pulsed laser and ns pulsed laser removing in the embodiment of the present invention to metal plate coating
Spin line scans schematic diagram；
There are the surface pictures of the high-strength steel steel plate of oxide layer after Fig. 3 is stripped for aluminium silicon coating in the embodiment of the present invention 1；
Fig. 4 is the table that aluminium silicon coating is stripped the high-strength steel steel plate after rear and oxide layer is gasified in the embodiment of the present invention 1
Face photo；
In figure:
1, nanosecoud pulse laser, 2, energy-transmission optic fibre, 3, collimation head, 4, laser beam, 5, two-dimensional scanning mirrors, 6, metal
Plate workpiece.
Specific embodiment
With reference to embodiment, the embodiment of the present invention is furthur described in detail.
The following examples are intended to illustrate the invention, but is not limited to protection scope of the present invention, protection model of the invention
It encloses and is subject to claims.
Unless otherwise specified, experiment reagent used in the embodiment of the present invention and material etc. are commercially available.
If not particularly pointing out, technological means used in the embodiment of the present invention is well known to the skilled person normal
Rule means.
In the description of the present invention, it should be noted that unless otherwise clearly defined and limited, term " connected " " connects
Connect " it shall be understood in a broad sense, for example, it may be being fixedly connected, it may be a detachable connection, or be integrally connected；It can be machine
Tool connection, is also possible to be electrically connected；It can be directly connected, two members can also be can be indirectly connected through an intermediary
Connection inside part.For the ordinary skill in the art, above-mentioned term can be understood in the present invention with concrete condition
Concrete meaning.
Embodiment 1
It is specific as schemed the embodiment of the invention provides the method that a kind of pair of metal plate coating carries out ps pulsed laser and ns pulsed laser removing
Shown in 1, the laser beam 4 that nanosecoud pulse laser 1 is issued successively is shaken by energy-transmission optic fibre 2, collimation head 3 by two-dimensional scanning
For the transmitting of mirror 5 to coating surface to be stripped, coating to be stripped generates explosive frit reaction after passing through ps pulsed laser and ns pulsed laser ablation,
And metal plate is detached under the drive for the high-speed flow that coating surface generates.
Meanwhile in order to remove the oxide generated after release coating, after ps pulsed laser and ns pulsed laser ablation coating to be stripped, adjust
The frequency of whole ps pulsed laser and ns pulsed laser by the oxide Quick-gasifying generated after release coating and is detached from metal plate.
Specifically, the movement of above-mentioned laser beam on a metal plate is the scanning of two-dimensional scanning mirrors and the straight line of metal plate
Mobile superposition.
In detail, as shown in Fig. 2, above-mentioned two-dimensional scanning mirrors are helical scanning, and above-mentioned two-dimensional scanning mirrors scan
Speed is 1000mm/s, sweep length 4mm.
In detail, the movement speed of above-mentioned metal plate is 3.5mm/s.
In the present embodiment, sheet-metal work 6 is specially the high-strength steel steel plate that surface is coated with 20-30 μm of aluminium silicon coating,
In the aluminium silicon coating on 6 surface of ablation sheet-metal work, the pulse width of used pulse laser is 60ns, and repetition rate is
30KHz, mean power 200W, the surface of the high-strength steel steel plate after removing is as shown in figure 3, it can be seen from the figure that aluminium silicon applies
Also there are oxide layers on its surface after layer is stripped；When the oxide generated after the release coating that gasifies, used pulse laser
Pulse width is 60ns, repetition rate 30KHz, mean power 10W, and the surface of the high-strength steel steel plate after the oxide layer that gasifies is such as
Shown in Fig. 4.
In detail, it is 180 μm that above-mentioned laser beam, which emits to the spot diameter formed on the coating surface to be stripped,.
Compared with the method for traditional mechanical stripping and chemical stripping, the more ring of stripping means provided by above-described embodiment
Guarantor, process control, precision and more efficient, and the mean power of laser used by stripping process are 180-200W, and existing
The method of the laser lift-off of multikilowatt employed in technology is compared, and cost substantially reduces；By by two-dimensional scanning mirrors control
It is made as helical scanning, while the linear movement of complexed metal plate, under the premise of guaranteeing peeling effect, coating can be effectively improved
Charge stripping efficiency, while can avoid zebra-stripe generation.
Embodiment 2
It is specific as schemed the embodiment of the invention provides the system that a kind of pair of metal plate coating carries out ps pulsed laser and ns pulsed laser removing
Shown in 1, including nanosecoud pulse laser 1, energy-transmission optic fibre 2, collimation head 3 and the two-dimensional scanning mirrors 5 set gradually, the nanosecond
The laser beam 4 that pulse laser 1 issues successively emits by energy-transmission optic fibre 2, collimation head 3 and two-dimensional scanning mirrors 4 to be stripped
From metal plate coating surface.
The system design science of ps pulsed laser and ns pulsed laser stripping metal plate coating provided by above-described embodiment is ingenious, and structure is closed
Reason has wide applicability, has a extensive future.
Finally, above the present invention is described in detail with a general description of the specific embodiments, but
On the basis of the present invention, it can be made some modifications or improvements, this will be apparent to those skilled in the art.Cause
This, these modifications or improvements, fall within the scope of the claimed invention without departing from theon the basis of the spirit of the present invention.
Claims (10)
1. the method that a kind of pair of metal plate coating carries out ps pulsed laser and ns pulsed laser removing, which is characterized in that by nanosecoud pulse laser
The laser beam of sending is emitted by two-dimensional scanning mirrors to coating surface to be stripped, and coating to be stripped is swashed by nanosecond pulse
Explosive frit reaction is generated after light ablation, and is detached from metal plate under the drive for the high-speed flow that coating surface generates.
2. the method according to claim 1, wherein further including, in ps pulsed laser and ns pulsed laser ablation coating to be stripped
Afterwards, the frequency for adjusting ps pulsed laser and ns pulsed laser by the oxide Quick-gasifying generated after release coating and is detached from metal plate.
3. method according to claim 1 or 2, which is characterized in that the ps pulsed laser and ns pulsed laser be infrared light, visible light or
Ultraviolet light, pulse width, repetition rate and the mean power of the ps pulsed laser and ns pulsed laser ablative coating are respectively 30-400ns, 2-
50KHz and 180-200W.
4. according to the method described in claim 2, it is characterized in that, the pulse of ps pulsed laser and ns pulsed laser gasification oxide is wide
Degree, repetition rate and mean power are respectively 30-400ns, 2-50KHz and 2-15W.
5. method according to claim 1 or 2, which is characterized in that the movement of the laser beam on a metal plate is two
Tie up the scanning of scanning galvanometer and being superimposed for the linear movement of metal plate.
6. according to the method described in claim 5, it is characterized in that, the two-dimensional scanning mirrors are helical scanning；Preferably,
The two-dimensional scanning mirrors scanning speed is 900-1200mm/s, sweep length 3-6mm.
7. according to the method described in claim 5, it is characterized in that, the speed of metal plate linear movement is 2-5mm/s.
8. the method according to claim 1, wherein the laser beam emits to the coating table to be stripped
The spot diameter formed on face is not more than 200 μm.
9. the method according to claim 1, wherein the metal plate is high strength steel plate, the coating to be stripped
For the aluminium silicon coating with a thickness of 15-35 μm.
10. the system that a kind of pair of metal plate coating carries out ps pulsed laser and ns pulsed laser removing, which is characterized in that received including what is set gradually
Pulse per second (PPS) laser, energy-transmission optic fibre, collimation head and two-dimensional scanning mirrors, the laser beam that the nanosecoud pulse laser issues according to
It is secondary to emit by energy-transmission optic fibre, collimation head and two-dimensional scanning mirrors to metal plate coating surface to be stripped.
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| CN201810962414.0A CN109175709B (en) | 2018-08-22 | 2018-08-22 | Method and system for nanosecond pulse laser stripping of metal plate coating |
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| CN201810962414.0A CN109175709B (en) | 2018-08-22 | 2018-08-22 | Method and system for nanosecond pulse laser stripping of metal plate coating |
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Cited By (6)
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| CN109948288A (en) * | 2019-04-01 | 2019-06-28 | 大连理工大学 | A kind of nanosecond laser ablation microflute cross section profile prediction technique |
| CN112676267A (en) * | 2020-12-10 | 2021-04-20 | 中国科学院半导体研究所 | Pulse laser cleaning method |
| CN113148997A (en) * | 2021-06-01 | 2021-07-23 | 大连理工大学 | Large-area thickness-controllable two-dimensional material nanosheet and general preparation method thereof |
| CN113522886A (en) * | 2021-07-21 | 2021-10-22 | 立讯电子科技（昆山）有限公司 | Method and equipment for removing coating by laser |
| CN114633017A (en) * | 2022-02-15 | 2022-06-17 | 江苏大学 | Method for efficiently removing thermal barrier coating by nanosecond laser |
| CN115889340A (en) * | 2022-11-01 | 2023-04-04 | 北京工业大学 | Method and system for cleaning greasy dirt on surface of metal plate by using rectangular light spot laser |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN109948288A (en) * | 2019-04-01 | 2019-06-28 | 大连理工大学 | A kind of nanosecond laser ablation microflute cross section profile prediction technique |
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| CN113148997A (en) * | 2021-06-01 | 2021-07-23 | 大连理工大学 | Large-area thickness-controllable two-dimensional material nanosheet and general preparation method thereof |
| CN113522886A (en) * | 2021-07-21 | 2021-10-22 | 立讯电子科技（昆山）有限公司 | Method and equipment for removing coating by laser |
| CN114633017A (en) * | 2022-02-15 | 2022-06-17 | 江苏大学 | Method for efficiently removing thermal barrier coating by nanosecond laser |
| CN115889340A (en) * | 2022-11-01 | 2023-04-04 | 北京工业大学 | Method and system for cleaning greasy dirt on surface of metal plate by using rectangular light spot laser |
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