CN115430661A - Laser cleaning system for cleaning surface of strip steel - Google Patents

Laser cleaning system for cleaning surface of strip steel Download PDF

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Publication number
CN115430661A
CN115430661A CN202110613337.XA CN202110613337A CN115430661A CN 115430661 A CN115430661 A CN 115430661A CN 202110613337 A CN202110613337 A CN 202110613337A CN 115430661 A CN115430661 A CN 115430661A
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CN
China
Prior art keywords
laser
continuous
cleaning system
cleaning
laser cleaning
Prior art date
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Pending
Application number
CN202110613337.XA
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Chinese (zh)
Inventor
汪义如
李山青
熊斐
李恩超
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Baoshan Iron and Steel Co Ltd
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Baoshan Iron and Steel Co Ltd
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Application filed by Baoshan Iron and Steel Co Ltd filed Critical Baoshan Iron and Steel Co Ltd
Priority to CN202110613337.XA priority Critical patent/CN115430661A/en
Publication of CN115430661A publication Critical patent/CN115430661A/en
Pending legal-status Critical Current

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    • BPERFORMING OPERATIONS; TRANSPORTING
    • B08CLEANING
    • B08BCLEANING IN GENERAL; PREVENTION OF FOULING IN GENERAL
    • B08B7/00Cleaning by methods not provided for in a single other subclass or a single group in this subclass
    • B08B7/0035Cleaning by methods not provided for in a single other subclass or a single group in this subclass by radiant energy, e.g. UV, laser, light beam or the like
    • B08B7/0042Cleaning by methods not provided for in a single other subclass or a single group in this subclass by radiant energy, e.g. UV, laser, light beam or the like by laser
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B08CLEANING
    • B08BCLEANING IN GENERAL; PREVENTION OF FOULING IN GENERAL
    • B08B13/00Accessories or details of general applicability for machines or apparatus for cleaning
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B65CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65HHANDLING THIN OR FILAMENTARY MATERIAL, e.g. SHEETS, WEBS, CABLES
    • B65H18/00Winding webs
    • B65H18/08Web-winding mechanisms
    • B65H18/10Mechanisms in which power is applied to web-roll spindle
    • B65H18/103Reel-to-reel type web winding and unwinding mechanisms
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B65CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
    • B65HHANDLING THIN OR FILAMENTARY MATERIAL, e.g. SHEETS, WEBS, CABLES
    • B65H23/00Registering, tensioning, smoothing or guiding webs

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  • Physics & Mathematics (AREA)
  • Optics & Photonics (AREA)
  • Cleaning In General (AREA)

Abstract

The invention discloses a laser cleaning system for cleaning the surface of strip steel, which comprises: the laser isolation device comprises a laser isolation chamber, a plurality of continuous lasers and a beam shaping device. Wherein, the wall of the laser isolation chamber is provided with a gap; the continuous lasers are all arranged in the laser isolation chamber and generate continuous point-like light spots; the beam shaping device is arranged in the laser isolation chamber and at the downstream of the continuous laser to shape the continuous point-like light spot into a linear light spot, and the linear light spot penetrates through the gap to irradiate the surface of the strip steel. The laser cleaning system can adopt the beam shaping device to shape the continuous point-shaped light spots into linear light spots for cleaning wide band steel, realizes high-speed cleaning of the continuous band steel, has strong industrial applicability, is efficient and environment-friendly in cleaning process, and has very wide development prospect.

Description

Laser cleaning system for cleaning surface of strip steel
Technical Field
The invention relates to a cleaning system, in particular to a laser cleaning system.
Background
As is well known, impurities such as rolling oil, iron powder and non-metallic solid particles are usually adhered to the surface of a strip steel obtained after cold rolling, and if the impurities are not cleaned, residual grease generates black spots, edge carbon defects and the like in the annealing process of the strip steel; carbon residue can affect the coating and the paint film adhesion; the residual solid particles can cause the furnace roller of the annealing furnace to form nodules, and then the problems of indentation, scratching and the like are generated on the surface of the strip steel. It can be seen that cleaning of cold-rolled steel strip is of great importance.
At present, the main cleaning process flow commonly adopted by the cleaning section of the domestic and international continuous annealing and coating unit is as follows: the cleaning process comprises the steps of alkali cleaning, electrolytic cleaning and rinsing, the cleaning mechanism is a cleaning mode combining mechanical cleaning, chemical cleaning and electrolytic cleaning, and the cleaning process has the problems of high energy consumption, high alkali consumption, more dangerous waste and the like.
Therefore, in order to avoid the problems of the existing cleaning process, the cleaning process can be considered to be performed by using a laser cleaning method, which is a novel surface cleaning technology and has the following advantages: (1) there is no mechanical contact; (2) the part to be cleaned is accurately positioned, and the cleaning device can be widely applied to different cleaning surfaces; (3) real-time monitoring can be realized, and feedback can be obtained in time; (4) no environmental pollution is caused; (5) can effectively remove extremely small pollution particles and the like.
The laser cleaning is to focus and shape a laser beam with high brightness and good directivity through an optical system to obtain a high-energy laser beam which is irradiated on the surface of a material to be cleaned so as to remove attachments on the surface of a cleaning object. In the process of laser cleaning, the light beam emitted by the laser is absorbed by substances on the surface to be treated, the combination between the attachment and the substrate is destroyed through the light action or the heat action, so that the attachment is separated from the surface of the material, and the purpose of cleaning is achieved, and the object to be cleaned is not damaged or the damage is controlled within an acceptable lower degree range.
Therefore, the laser cleaning is applied to the removal of rolling oil and iron powder on the surface of the strip steel, has the advantages of no consumption of chemical reagents, no pollution to the environment, small occupied area, easy control and the like, meets the requirement of social sustainable development, and has wide development prospect.
In the prior art, the existing laser cleaning technology has been widely and commercially applied in the aspects of cleaning sculptures, rubber, ships, parts and the like, and the cleaning of cold-rolled continuous strip steel in iron and steel enterprises has the characteristics of high speed, large width and the like. Therefore, the key point of cleaning the cold-rolled continuous strip steel plate by adopting a laser cleaning mode is how to design a laser cleaning system so as to realize high-speed and transversely uniform steel plate cleaning.
The current laser oil removal technology and related patent documents mainly focus on cleaning of small parts, but few patents for high-speed laser oil removal of the surface of strip steel exist, and the currently inquired laser oil removal patents adopt pulse point-like light spots to clean the steel plate by means of a vibrating mirror. For the cleaning of wide band steel, the vibrating mirror form is difficult to meet the cleaning requirement under the condition of high-speed movement.
Based on the above, aiming at the defects of the laser degreasing technology in the prior art, the invention is expected to obtain the laser cleaning system for cleaning the surface of the strip steel, which can shape the continuous point-shaped light spots into linear light spots through the light beam shaping device so as to be used for cleaning wide strip steel and realize high-speed cleaning of the continuous strip steel. The laser cleaning system can be effectively applied to cleaning of rolling oil and iron powder on the surface of the cold-rolled strip steel, has strong industrial applicability, is efficient and environment-friendly in cleaning process, and has very wide development prospect.
Disclosure of Invention
One of the purposes of the invention is to provide a laser cleaning system for cleaning the surface of strip steel, and the invention can adopt a light beam shaping device to shape continuous point-like light spots into continuous linear light spots by optimally designing the laser cleaning system so as to be used for cleaning wide strip steel and realize high-speed cleaning of the continuous strip steel. The laser cleaning system can be effectively applied to cleaning of rolling oil and iron powder on the surface of the cold-rolled strip steel, has strong industrial applicability, is efficient and environment-friendly in cleaning process, and has very wide development prospect.
In order to achieve the above object, the present invention provides a laser cleaning system for cleaning a surface of a steel strip, comprising:
the wall of the laser isolation chamber is provided with a gap;
the continuous lasers are arranged in the laser isolation chamber and generate continuous point-like light spots;
and the beam shaping device is arranged in the laser isolation chamber and at the downstream of the continuous laser so as to shape the continuous point-like light spot into a linear light spot, and the linear light spot penetrates through the gap to irradiate the surface of the strip steel.
Further, the beam shaping device comprises a concave-flat cylindrical lens and a convex-flat cylindrical lens group, a first flat glass, a second flat glass and a cylindrical lens focusing device, wherein continuous point-like light spots pass through the concave-flat cylindrical lens and the convex-flat cylindrical lens group to realize beam expansion in the Y direction; the expanded laser passes through a first flat glass stacked in the Y direction to realize the division of the light beam; the split light beams pass through second flat glass stacked in the X direction to realize rearrangement of the light beams; and the rearranged laser passes through a cylindrical mirror focusing device to realize focusing in the X direction so as to obtain the continuous linear light spot.
Further, in the laser cleaning system of the present invention, the continuum laser is a semiconductor continuum laser or an Nd: YAG (neodymium-doped yttrium aluminum garnet) continuous laser.
Further, in the laser cleaning system of the present invention, the length of the linear light spot is 20mm to 1000mm.
Further, in the laser cleaning system of the invention, the laser cleaning system further comprises a laser cleaning chamber, and the strip steel moves through the laser cleaning chamber.
Further, in the laser cleaning system of the present invention, the strip steel moves through the laser cleaning chamber from bottom to top.
Furthermore, the laser cleaning system also comprises a steering roller device, and the strip steel is steered by the steering roller device and then is sent into the laser cleaning chamber.
Further, in the laser cleaning system of the present invention, the laser cleaning system further includes a dust collecting chamber and a dust collecting duct communicated with the dust collecting chamber.
Further, in the laser cleaning system of the present invention, at least one of a cloth bag dust removing device, a cyclone dust removing device, a high voltage electrostatic dust removing device or a spray dust removing device is disposed in the dust collecting chamber.
Furthermore, in the laser cleaning system, two sides of two surfaces of the strip steel are respectively provided with a corresponding continuous laser and a beam shaping device.
Further, in the laser cleaning system of the invention, the energy density of the linear light spot is 1-4W/cm 2
Compared with the prior art, the laser cleaning system has the following advantages and beneficial effects:
different from the method for cleaning the steel plate by adopting the pulse point-like light spots and using a vibrating mirror in the prior art, the invention can adopt the light beam shaping device to shape the continuous point-like light spots into linear light spots by optimally designing the laser cleaning system so as to be used for cleaning wide band steel and realize the high-speed cleaning of the continuous band steel.
The laser cleaning system can be effectively applied to cleaning of rolling oil and iron powder on the surface of the cold-rolled strip steel, has strong industrial applicability, is efficient and environment-friendly in cleaning process, and has very wide development prospect.
Drawings
FIG. 1 is a schematic structural diagram of a laser cleaning system for cleaning the surface of a steel strip according to an embodiment of the invention.
Detailed Description
The laser cleaning system according to the present invention will be further explained and illustrated with reference to the drawings and the specific embodiments of the present specification, which, however, should not be construed to unduly limit the technical solutions of the present invention.
In the invention, different from the scheme that the pulse point-shaped light spot is cleaned by a vibrating mirror adopted by the existing laser degreasing technology, the laser cleaning system can realize high-speed cleaning of continuous strip steel by shaping continuous laser into linear light spots.
FIG. 1 is a schematic structural diagram of a laser cleaning system for cleaning the surface of a steel strip according to an embodiment of the invention.
As shown in fig. 1, in this embodiment, the laser cleaning system according to the present invention may include: continuous laser 4, laser isolation chamber 3, beam shaping device 5, laser cleaning chamber 10, dust collecting pipe 2 and dust collecting chamber 1. Wherein, the continuous laser 4 can be added and set up a plurality of according to the specific application demand.
In this embodiment, a slit is formed in a wall of the laser isolation chamber 3 according to the present invention; both the continuum laser 4 and the beam shaping device 5 may be disposed within the laser isolation chamber 3, with the beam shaping device 5 disposed within the laser isolation chamber 3 downstream of the continuum laser 4.
In the present invention, the continuum laser 4 may be selected from a semiconductor continuum laser or an Nd: YAG (neodymium-doped yttrium aluminum garnet) continuous laser can generate continuous point-shaped light spots with the length of 20 mm-1000 mm, the generated continuous point-shaped light spots can be shaped into linear light spots by the light beam shaping device 5, and the formed linear light spots can penetrate through the gap of the laser isolation chamber 3 and irradiate the surface of the strip steel 11.
As can be further seen from fig. 1, in the present embodiment, the strip 11 can be fed to the laser cleaning chamber 10 of the present invention for cleaning through the cooperation between the strip uncoiler 6 and the coiler 9. In the invention, the uncoiler 6 can uncoil the steel coil of the strip steel 11, the uncoiled strip steel 11 can move into the laser cleaning chamber 10 to clean the surface of the strip steel 11, and the strip steel 11 moves from bottom to top when passing through the laser cleaning chamber 10. After the cleaning, the strip steel 11 is output from the laser cleaning chamber 10, and then is coiled again by the coiling machine 9 into a steel coil.
However, it should be noted that, in the present embodiment, in order to control the movement path of the strip 11, the turning roll device 8 and the pinch roll device 7 are further provided in the present invention. The strip steel 1 output from the uncoiler 6 can be conveyed into the laser cleaning chamber 10 after passing through the pinch roll device 7 and being turned by the turning roll device 8.
Correspondingly, the continuous laser 4 in the laser isolation chamber 3 can generate continuous point-like light spots, the generated continuous point-like light spots can be shaped into linear light spots through the light beam shaping device 5, and the linear light spots are irradiated to the surface of the moving strip steel 11 through the gap of the laser isolation chamber 3, so that rolling oil and iron powder on the surface of the steel plate are removed; the flue gas generated by laser cleaning is collected in the dust collecting chamber 1 through the dust collecting pipeline 2, so that air pollution caused by air diffusion is prevented, and the strip steel 11 after laser cleaning can enter a continuous annealing furnace for annealing treatment or be rolled and then put into a bell-type furnace for annealing treatment.
It should be noted that, in some embodiments, the light beam shaping device 5 may include a concave-plano cylindrical lens and a convex-plano cylindrical lens group, a first flat glass, a second flat glass, and a cylindrical lens focusing device, wherein the continuous point-like light spots pass through the concave-plano cylindrical lens and the convex-plano cylindrical lens group to realize beam expansion in the Y direction; the expanded laser passes through the first flat glass stacked in the Y direction to realize the splitting of the light beam; the split light beams pass through second flat glass stacked in the X direction to realize rearrangement of the light beams; and the rearranged laser passes through a cylindrical mirror focusing device to realize focusing in the X direction so as to obtain the continuous linear light spot.
In this embodiment, the invention may use a cold-rolled strip 11 having a width of 1200mm and a thickness of 0.702mm, which is welded to the tail of the previous strip and is sent to the laser cleaning chamber 10 through the pinch roll unit 7 and the turn roll unit 8. In the invention, 6 groups of semiconductor continuous lasers 4 can be arranged, 3 groups of semiconductor continuous lasers 4 are respectively arranged on two sides of the strip steel 11, and the beam shaping devices 5 are correspondingly arranged to complete laser cleaning on the two side surfaces of the strip steel 11, and point-shaped light spots generated by the semiconductor continuous lasers 4 can pass throughThe light beam shaping device 5 shapes the light beam into a linear light spot with the length of 400mm, and the energy density of the linear light spot is 1-4/cm 2
In addition, in the invention, at least one of a cloth bag dust removing device, a cyclone dust removing device, a high-voltage electrostatic dust removing device or a spraying dust removing device can be arranged in the dust collecting chamber 1, and the flue gas generated by laser cleaning can be collected in the dust collecting chamber 1 through the dust collecting pipeline 2.
In conclusion, the invention is mainly applied to cleaning the rolling oil and the iron powder on the surface of the cold-rolled strip steel, and the rolling oil and the iron powder are removed through the continuous laser cleaning process, so that the strip steel is cleaned efficiently and environmentally. The invention has strong industrial applicability and wide development prospect.
It should be noted that the combination of the features in the present application is not limited to the combination described in the claims of the present application or the combination described in the specific examples, and all the features described in the present application may be freely combined or combined in any manner unless contradicted by each other.
It should also be noted that the above-mentioned embodiments are only specific embodiments of the present invention. It is apparent that the present invention is not limited to the above embodiments and similar changes or modifications can be easily made by those skilled in the art from the disclosure of the present invention and shall fall within the scope of the present invention.

Claims (10)

1. A laser cleaning system for cleaning the surface of a steel strip, comprising:
the wall of the laser isolation chamber is provided with a gap;
the continuous lasers are arranged in the laser isolation chamber and generate continuous point-like light spots;
the beam shaping device is arranged in the laser isolation chamber and at the downstream of the continuous laser to shape the continuous point-like light spot into a linear light spot, and the linear light spot penetrates through the gap to irradiate the surface of the strip steel;
a laser cleaning chamber through which the strip passes in motion.
2. The laser cleaning system of claim 1, wherein the continuous laser is a semiconductor continuous laser or a neodymium-doped yttrium aluminum garnet continuous laser.
3. The laser cleaning system of claim 1, wherein the linear spot has a length of 20mm to 1000mm.
4. The laser cleaning system of claim 1, wherein the steel strip moves through the laser cleaning chamber from bottom to top.
5. The laser cleaning system of claim 1, further comprising a turn roll assembly, wherein the strip is turned by the turn roll assembly and fed into the laser cleaning chamber.
6. The laser cleaning system of claim 1, further comprising a dust collection chamber and a dust collection conduit in communication with the dust collection chamber.
7. The laser cleaning system of claim 6, wherein at least one of a cloth bag dust removal device, a cyclone dust removal device, a high voltage electrostatic dust removal device or a spray dust removal device is disposed in the dust collection chamber.
8. The laser cleaning system of claim 1, wherein the respective continuum laser and beam shaping device are provided on each side of both surfaces of the strip.
9. The laser cleaning system of claim 1, wherein the linear spot has an energy density of 1 to 4W/cm 2
10. The laser cleaning system of any one of claims 1-9, wherein the beam shaping device comprises a concave-plano-cylindrical lens and a plano-convex cylindrical lens group, a first plate glass, a second plate glass, and a cylindrical lens focusing device, wherein continuous point-like spots pass through the concave-plano-cylindrical lens and the plano-convex cylindrical lens group to realize beam expansion in the Y direction; the expanded laser passes through a first flat glass stacked in the Y direction to realize the division of the light beam; the split light beams pass through second flat glass stacked in the X direction to realize rearrangement of the light beams; and the rearranged laser passes through a cylindrical mirror focusing device to realize focusing in the X direction so as to obtain the continuous linear light spot.
CN202110613337.XA 2021-06-02 2021-06-02 Laser cleaning system for cleaning surface of strip steel Pending CN115430661A (en)

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Application Number Priority Date Filing Date Title
CN202110613337.XA CN115430661A (en) 2021-06-02 2021-06-02 Laser cleaning system for cleaning surface of strip steel

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Application Number Priority Date Filing Date Title
CN202110613337.XA CN115430661A (en) 2021-06-02 2021-06-02 Laser cleaning system for cleaning surface of strip steel

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CN115430661A true CN115430661A (en) 2022-12-06

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Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US6291796B1 (en) * 1994-10-17 2001-09-18 National University Of Singapore Apparatus for CFC-free laser surface cleaning
CN101397678A (en) * 2007-09-29 2009-04-01 宝山钢铁股份有限公司 Laser desorption processing method for steel plate surface
CN203936519U (en) * 2014-05-30 2014-11-12 宁德新能源科技有限公司 Electrodes of lithium-ion batteries coating cleaning device
CN105425400A (en) * 2015-12-18 2016-03-23 华中科技大学 Gaussian beam shaping system based on cutting rearrangement
CN209006311U (en) * 2018-11-07 2019-06-21 唐山全丰薄板有限公司 A kind of belt steel surface laser machining device
CN111112237A (en) * 2020-01-10 2020-05-08 广东利元亨智能装备股份有限公司 Laser cleaning equipment

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US6291796B1 (en) * 1994-10-17 2001-09-18 National University Of Singapore Apparatus for CFC-free laser surface cleaning
CN101397678A (en) * 2007-09-29 2009-04-01 宝山钢铁股份有限公司 Laser desorption processing method for steel plate surface
CN203936519U (en) * 2014-05-30 2014-11-12 宁德新能源科技有限公司 Electrodes of lithium-ion batteries coating cleaning device
CN105425400A (en) * 2015-12-18 2016-03-23 华中科技大学 Gaussian beam shaping system based on cutting rearrangement
CN209006311U (en) * 2018-11-07 2019-06-21 唐山全丰薄板有限公司 A kind of belt steel surface laser machining device
CN111112237A (en) * 2020-01-10 2020-05-08 广东利元亨智能装备股份有限公司 Laser cleaning equipment

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Application publication date: 20221206