CN111167803A - Laser wet cleaning method and device - Google Patents

Laser wet cleaning method and device Download PDF

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Publication number
CN111167803A
CN111167803A CN201911287203.2A CN201911287203A CN111167803A CN 111167803 A CN111167803 A CN 111167803A CN 201911287203 A CN201911287203 A CN 201911287203A CN 111167803 A CN111167803 A CN 111167803A
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CN
China
Prior art keywords
pipe
laser
water
cleaned
water tank
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Pending
Application number
CN201911287203.2A
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Chinese (zh)
Inventor
阚艳
唐斌
李广
张志强
刘欢
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Shanghai Hangyi High Tech Development Research Institute Co Ltd
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Shanghai Hangyi High Tech Development Research Institute Co Ltd
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Application filed by Shanghai Hangyi High Tech Development Research Institute Co Ltd filed Critical Shanghai Hangyi High Tech Development Research Institute Co Ltd
Priority to CN201911287203.2A priority Critical patent/CN111167803A/en
Publication of CN111167803A publication Critical patent/CN111167803A/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
    • B23MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
    • B23KSOLDERING OR UNSOLDERING; WELDING; CLADDING OR PLATING BY SOLDERING OR WELDING; CUTTING BY APPLYING HEAT LOCALLY, e.g. FLAME CUTTING; WORKING BY LASER BEAM
    • B23K26/00Working by laser beam, e.g. welding, cutting or boring
    • B23K26/14Working by laser beam, e.g. welding, cutting or boring using a fluid stream, e.g. a jet of gas, in conjunction with the laser beam; Nozzles therefor
    • B23K26/1435Working by laser beam, e.g. welding, cutting or boring using a fluid stream, e.g. a jet of gas, in conjunction with the laser beam; Nozzles therefor involving specially adapted flow control means
    • B23K26/1436Working by laser beam, e.g. welding, cutting or boring using a fluid stream, e.g. a jet of gas, in conjunction with the laser beam; Nozzles therefor involving specially adapted flow control means for pressure control
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B23MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
    • B23KSOLDERING OR UNSOLDERING; WELDING; CLADDING OR PLATING BY SOLDERING OR WELDING; CUTTING BY APPLYING HEAT LOCALLY, e.g. FLAME CUTTING; WORKING BY LASER BEAM
    • B23K26/00Working by laser beam, e.g. welding, cutting or boring
    • B23K26/14Working by laser beam, e.g. welding, cutting or boring using a fluid stream, e.g. a jet of gas, in conjunction with the laser beam; Nozzles therefor
    • B23K26/146Working by laser beam, e.g. welding, cutting or boring using a fluid stream, e.g. a jet of gas, in conjunction with the laser beam; Nozzles therefor the fluid stream containing a liquid
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B23MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
    • B23KSOLDERING OR UNSOLDERING; WELDING; CLADDING OR PLATING BY SOLDERING OR WELDING; CUTTING BY APPLYING HEAT LOCALLY, e.g. FLAME CUTTING; WORKING BY LASER BEAM
    • B23K26/00Working by laser beam, e.g. welding, cutting or boring
    • B23K26/70Auxiliary operations or equipment
    • B23K26/702Auxiliary equipment
    • B23K26/703Cooling arrangements

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  • Physics & Mathematics (AREA)
  • Optics & Photonics (AREA)
  • Engineering & Computer Science (AREA)
  • Plasma & Fusion (AREA)
  • Mechanical Engineering (AREA)
  • Cleaning By Liquid Or Steam (AREA)

Abstract

The invention discloses a laser wet cleaning method and a device, when a to-be-cleaned object is radiated by laser, the to-be-cleaned object is placed in a container containing cooling heat dissipation liquid and/or the to-be-cleaned object is sprayed with the cooling heat dissipation liquid by adopting a spraying system. When the laser is adopted to radiate an object to be cleaned, the gasification of the cooling heat dissipation liquid is utilized to absorb and dissipate heat of the laser radiation surface; the cleaning device has the advantages that the thermal influence caused by the adoption of the original cleaning technology when a cleaning object with a thicker pollution layer or difficult to clean is subjected to multiple pulses for cyclic cleaning is avoided, the adverse effect of heating influence such as near-surface hardening and the like on the surface of a material is eliminated, and the cleaning device is of great significance for small-sized or high-performance cleaning objects.

Description

Laser wet cleaning method and device
Technical Field
The invention relates to the technical field of laser cleaning, in particular to a laser wet cleaning method and device.
Background
The laser cleaning can remove pollutants on the surfaces of various materials, no chemical agent or cleaning liquid is used, the cleaned wastes are mainly solid powder, the size is small, the laser cleaning is easy to store and can be recycled, and the environmental pollution caused by cleaning agents can be avoided. The laser cleaning process depends on the characteristics of light pulses generated by a laser, and based on the photophysical reaction caused by the interaction among a high-intensity light beam, a short-pulse laser and a pollution layer, when the high-power-density laser directly irradiates the surface of an object to be cleaned, under the combined action of mechanisms such as rapid thermal vibration, vaporization, melting and plasma stripping, coatings, rusts and oil stains attached to the surface are instantly vaporized, ablated or stripped. Each laser pulse is capable of removing a thickness of the contamination layer. But if the contamination layer is thick or difficult to clean, multiple pulses are required to clean. The number of pulses required to clean the surface depends on the degree of surface contamination. Laser cleaning can be used for cleaning not only organic pollutants, but also inorganic matters, including corrosion of metals, metal particles, dust and the like. The laser cleaning technology is gradually applied to the aspects of cleaning the surfaces of wafers in the mechanical industry and the microelectronic industry, peeling paint on the surfaces of trains in a layering way, removing paint in daily maintenance of airplanes and naval vessels, removing rust of petrochemical pipelines, removing grease of tire molds and the like at home and abroad.
During laser cleaning, due to the combined action of rapid thermal vibration, vaporization, melting, plasma stripping and the like generated by the direct irradiation of high-power-density laser on the surface of a cleaned object, surface pollutants are instantly vaporized, ablated or stripped, and especially pollutants of combustible gas can be generated after high-temperature vaporization. Such as: the colloid on the metal glue pressing valve is as thick as about 4mm, a plurality of pulses are needed for cyclic cleaning and removal, the colloid generates combustible gas and is directly combusted after being radiated by laser with high power density, the colloid and the combustible gas interact, the infrared thermal imager detects that the surface temperature rise exceeds 150 ℃, the melting and recondensing phenomenon occurs on the surface of the base material, and the thermal influence is generated on the surface of the material. The existing laser cleaning method mainly comprises the following steps: a. the laser dry cleaning method adopts pulse laser to directly radiate for decontamination; b. the laser and liquid film method, namely, a layer of liquid film is deposited on the surface of the substrate at first, and then the laser radiation is used for decontamination; c. the laser and inert gas method is characterized in that while laser is radiated, inert gas is blown to the surface of a substrate, and dirt is blown off the surface by the gas immediately after being stripped from the surface, so that the surface is prevented from being polluted and oxidized again; d. the laser + non-corrosive chemical method is to loosen dirt by using laser and then clean the dirt by using the non-corrosive chemical method. Laser dry cleaning methods are generally adopted, and the methods have difficulty in avoiding adverse effects of heating influences such as near-surface hardening and the like on the surface of a material for removing serious pollution which needs to be cleaned in a circulating way by multiple pulses.
Disclosure of Invention
In order to solve the problems mentioned in the background art, the invention provides a laser wet cleaning method and a laser wet cleaning device, which can avoid the adverse effects of heating influences such as near-surface layer hardening and the like on the surface of a material caused by laser cleaning.
When the laser is used for radiating an object to be cleaned, the object to be cleaned is placed in a container containing cooling heat dissipation liquid and/or the cooling heat dissipation liquid is sprayed on the object to be cleaned by adopting a spraying system.
Further, when the object to be cleaned is placed in the container containing the cooling heat-dissipating liquid, the object to be cleaned is immersed in the cooling heat-dissipating liquid to a depth of 0.1 to 1 mm.
Further, the cooling heat dissipation liquid is water.
The invention also provides a device for the laser wet cleaning method, which comprises a container and/or a spraying system for placing the object to be cleaned;
spray system includes the water tank, the water tank leads to pipe intercommunication has first self priming pump, first self priming pump leads to pipe intercommunication has three solenoid valve, two play medium ends of three solenoid valve have spray set, first filter through the pipe intercommunication respectively, first filter leads to pipe and water tank intercommunication, spray set one side is equipped with the recovery pond that is located below the ground horizontal line, the recovery pond leads to pipe intercommunication has the second filter, the second filter leads to pipe intercommunication has the second self priming pump, the second self priming pump leads to pipe and water tank intercommunication.
Furthermore, the container is included, a plurality of overflow holes which are positioned on the same horizontal line are arranged on the side wall of the container, and the height from the overflow holes to the inner wall of the bottom of the container is 0.1-1 mm.
And furthermore, a water pipe which comprises the spraying system and is communicated with the spraying device and the three-way electromagnetic valve is also communicated with an overflow valve through a water pipe, and the overflow valve is communicated with the water tank through a water pipe.
Furthermore, the spraying device comprises an annular water pipe communicated with the three-way electromagnetic valve through a water pipe, a plurality of nozzles are uniformly distributed on the inner circumferential side wall of the annular water pipe, and the nozzles are obliquely and downwards arranged.
Further, the water tank still communicates has the moisturizing pipe that is used for connecting outside water source, be equipped with electric stop valve on the moisturizing pipe, electric stop valve electricity is connected with the controller, the controller still electricity is connected with the level gauge, the level gauge is located inside the water tank.
Further, the controller is also electrically connected with the three-way electromagnetic valve, the first self-priming pump, the second self-priming pump and the overflow valve.
Further, the liquid level meter is an ultrasonic liquid level meter; the ultrasonic liquid level meter is characterized in that a support is fixedly connected to the inner wall of the water tank, and the ultrasonic liquid level meter is fixedly mounted on the support.
The invention has the beneficial effects that:
1. when the laser is adopted to radiate an object to be cleaned, the gasification of the cooling heat dissipation liquid is utilized to absorb and dissipate heat of the laser radiation surface; the cleaning device has the advantages that the thermal influence caused by the adoption of the original cleaning technology when a cleaning object with a thicker pollution layer or difficult to clean is subjected to multiple pulses for cyclic cleaning is avoided, the adverse effect of heating influence such as near-surface hardening and the like on the surface of a material is eliminated, and the cleaning device is of great significance for small-sized or high-performance cleaning objects.
2. The device is provided with the second self-sucking pump and the second filter, and can be used for filtering water in the recovery tank and then recovering the water into the water tank, so that the purpose of recovery is achieved.
3. When the device is not used for spraying, water in the water tank can sequentially pass through the first self-priming pump, the three-way electromagnetic valve and the first filter and then return to the water tank, so that the aim of circulating filtration is fulfilled.
4. The device is provided with a water replenishing pipe and a liquid level meter, and when the water level in the water tank is reduced to a water level threshold value, the water in the water tank can be automatically replenished.
Drawings
Fig. 1 is a schematic structural diagram of a spraying system.
Fig. 2 is a schematic structural view of the container.
Wherein, 1 is the water tank, 2 is first self priming pump, 3 is three solenoid valve, 4 is first filter, 5 are the recovery pond, 6 are the second filter, 7 are second self priming pump, 8 are the overflow valve, 9 are annular water pipe, 10 are the nozzle, 11 are moisturizing pipe, 12 are electric stop valve, 13 are the controller, 14 are the level gauge, 15 are the support, 16 are the container, 17 are the overflow hole, 18 are for waiting to wash the object.
Detailed Description
The present invention will be described in further detail below with reference to specific embodiments thereof, with reference to the accompanying drawings.
Example 1
A laser wet cleaning method comprises the steps of placing cooling heat dissipation liquid in a container, immersing an object to be cleaned in the cooling heat dissipation liquid, and radiating the part of the object to be cleaned, which is immersed below a liquid level, by adopting laser. Wherein, the cooling heat dissipation liquid is water, and the depth of the object to be cleaned immersed in the cooling heat dissipation liquid is 0.1 mm.
The device for the laser wet cleaning method comprises a container 16 for placing an object 18 to be cleaned, wherein a plurality of overflow holes 17 which are positioned on the same horizontal line are arranged on the side wall of the container 16. Wherein the height from the overflow hole 17 to the inner wall of the bottom of the container 16 is 0.1 mm.
Example 2
A laser wet cleaning method adopts a spraying system to spray cooling heat dissipation liquid on the surface of an object to be cleaned while radiating the object to be cleaned by laser. Wherein the cooling heat dissipation liquid is water.
As shown in the figure, the device for the laser wet cleaning method comprises a spraying system, the spraying system comprises a water tank 1, the water tank 1 is communicated with a first self-sucking pump 2 through a water pipe, the first self-sucking pump 2 is communicated with a three-way electromagnetic valve 3 through a water pipe, the three-way electromagnetic valve 3 is provided with a medium inlet end, two medium outlet ends, the medium inlet end of the three-way electromagnetic valve 3 is communicated with the first self-sucking pump 2 through a water pipe, the two medium outlet ends of the three-way electromagnetic valve 3 are respectively communicated with a spraying device through a water pipe, a first filter 4, the first filter 4 is communicated with the water tank 1 through a water pipe, one side of the spraying device is provided with a recovery pond 5 located below a ground horizontal line, the recovery pond 5 is communicated with a second filter 6 through a water pipe, the second filter 6 is communicated with a second self-sucking pump 7 through a water pipe.
Wherein, the water pipe which communicates the spray device and the three-way electromagnetic valve 3 is also communicated with an overflow valve 8 through a water pipe, and the overflow valve 8 is communicated with the water tank 1 through a water pipe. The relief valve 8 functions as a pressure control.
Wherein, spray set includes the annular water pipe 9 that leads to pipe and three-way solenoid valve 4 intercommunication, and evenly distributed has a plurality of nozzle 10 on the circumference lateral wall in annular water pipe 9, and nozzle 10 slope sets up downwards. Wherein 8 nozzles 10 are provided.
Wherein, water tank 1 still communicates has the moisturizing pipe 11 that is used for connecting outside water source, is equipped with electric stop valve 12 on the moisturizing pipe 11, and electric stop valve 12 electricity is connected with controller 13, and controller 13 still electricity is connected with level gauge 14, and level gauge 14 is located inside water tank 1.
Wherein, controller 13 still is connected with three solenoid valve 3, first self priming pump 2, second self priming pump 7, overflow valve 8 electricity. The controller 13 is a PLC controller.
Wherein the liquid level meter 14 is an ultrasonic liquid level meter. The upper part of the inner wall of the water tank 1 is fixedly connected with a bracket 15, and the ultrasonic liquid level meter is fixedly arranged on the bracket 15.
When concrete implementation, will treat that cleaning object 18 places subaerially, adopt laser to treat cleaning object 18 and open three solenoid valve 3 when carrying out the radiation, water in the water tank 1 enters into nozzle 10 through first self priming pump 2, three solenoid valve 3, annular water pipe 9, water sprays by nozzle 10 and treats cleaning object 18, treats cleaning object 18 and cools off, flows to subaerial water and flows to the recovery pond certainly, again through second filter 6, during second self priming pump 7 retrieves water tank 1. Close three solenoid valve 3 when not needing to spray, the water in the water tank 1 gets back to water tank 1 through first self priming pump 2, three solenoid valve 3, first filter 4 in proper order, plays circulating filtration's effect. The water level threshold value is preset through the controller 13, when the liquid level meter 14 detects that the water level in the water tank 1 drops to the water level threshold value, the liquid level meter 14 transmits a signal to the controller 13, the controller 13 opens the electric stop valve 12, and an external water source enters the water tank 1 through the water replenishing pipe 11.
Example 3
A laser wet cleaning method comprises the steps of placing cooling heat dissipation liquid in a container, immersing an object to be cleaned in the cooling heat dissipation liquid, radiating the object to be cleaned by laser, and spraying the cooling heat dissipation liquid on the surface of the object to be cleaned by a spraying system. Wherein the cooling heat dissipation liquid is water. The depth of the object to be cleaned immersed in the cooling heat dissipation liquid is 0.5 mm.
An apparatus for a laser wet cleaning method comprises a container 16 and a spraying system, wherein the container 16 has the same structure as the container in embodiment 1, and the spraying system has the same structure as the spraying system in embodiment 2. In practice, the container 16 is placed under the spraying device.
Although the present invention has been described in detail with reference to the foregoing embodiments, it will be apparent to those skilled in the art that changes may be made in the embodiments and/or equivalents thereof without departing from the spirit and scope of the invention. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.

Claims (10)

1. A laser wet cleaning method is characterized in that when an object to be cleaned is irradiated by laser, the object to be cleaned is placed in a container containing cooling heat dissipation liquid and/or the cooling heat dissipation liquid is sprayed on the object to be cleaned by adopting a spraying system.
2. The laser wet cleaning method according to claim 1, wherein when the object to be cleaned is placed in a container containing the cooling heat-dissipating liquid, the object to be cleaned is immersed in the cooling heat-dissipating liquid to a depth of 0.1 to 1 mm.
3. The laser wet cleaning method according to claim 1 or 2, wherein the cooling heat-dissipating liquid is water.
4. The device for the laser wet cleaning method is characterized by comprising a container for placing an object to be cleaned and/or a spraying system;
spray system includes the water tank, the water tank leads to pipe intercommunication has first self priming pump, first self priming pump leads to pipe intercommunication has three solenoid valve, two play medium ends of three solenoid valve have spray set, first filter through the pipe intercommunication respectively, first filter leads to pipe and water tank intercommunication, spray set one side is equipped with the recovery pond that is located below the ground horizontal line, the recovery pond leads to pipe intercommunication has the second filter, the second filter leads to pipe intercommunication has the second self priming pump, the second self priming pump leads to pipe and water tank intercommunication.
5. The apparatus of claim 4, wherein the apparatus comprises the container, and the side wall of the container is provided with a plurality of overflow holes located on the same horizontal line, and the height from the overflow hole to the inner wall of the bottom of the container is 0.1-1 mm.
6. The device for the laser wet cleaning method according to claim 4, wherein a water pipe which comprises the spraying system and is communicated with the spraying device and the three-way electromagnetic valve is further communicated with an overflow valve through a water pipe, and the overflow valve is communicated with a water tank through a water pipe.
7. The apparatus of claim 6, wherein the spraying means comprises an annular water pipe connected to the three-way solenoid valve through a water pipe, and a plurality of nozzles are uniformly distributed on the inner circumferential sidewall of the annular water pipe, and are arranged obliquely downward.
8. The device for the laser wet cleaning method according to claim 6 or 7, wherein the water tank is further communicated with a water replenishing pipe for connecting an external water source, an electric stop valve is arranged on the water replenishing pipe, the electric stop valve is electrically connected with a controller, the controller is further electrically connected with a liquid level meter, and the liquid level meter is positioned inside the water tank.
9. The apparatus according to claim 8, wherein the controller is further electrically connected to the three-way solenoid valve, the first self-priming pump, the second self-priming pump, and the overflow valve.
10. The apparatus for laser wet cleaning method as claimed in claim 8, wherein said liquid level meter is an ultrasonic liquid level meter; the ultrasonic liquid level meter is characterized in that a support is fixedly connected to the inner wall of the water tank, and the ultrasonic liquid level meter is fixedly mounted on the support.
CN201911287203.2A 2019-12-14 2019-12-14 Laser wet cleaning method and device Pending CN111167803A (en)

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Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN112605067A (en) * 2020-12-11 2021-04-06 南开大学 Laser cleaning method for resin-based composite material surface coating
RU2768086C1 (en) * 2020-11-03 2022-03-23 Общество с ограниченной ответственностью "Технологический центр "Лазарт" (ООО "ТЦЛ") Method for wet laser cleaning of hard surfaces
CN115383328A (en) * 2022-09-30 2022-11-25 深圳市奥格斯特科技有限公司 Disassembling method of full-lamination display screen
TWI823059B (en) * 2021-02-25 2023-11-21 宏惠光電股份有限公司 Wet laser cleaning equipment and procedures

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Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
RU2768086C1 (en) * 2020-11-03 2022-03-23 Общество с ограниченной ответственностью "Технологический центр "Лазарт" (ООО "ТЦЛ") Method for wet laser cleaning of hard surfaces
CN112605067A (en) * 2020-12-11 2021-04-06 南开大学 Laser cleaning method for resin-based composite material surface coating
CN112605067B (en) * 2020-12-11 2023-12-26 南开大学 Laser cleaning method for resin matrix composite surface coating
TWI823059B (en) * 2021-02-25 2023-11-21 宏惠光電股份有限公司 Wet laser cleaning equipment and procedures
CN115383328A (en) * 2022-09-30 2022-11-25 深圳市奥格斯特科技有限公司 Disassembling method of full-lamination display screen

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Application publication date: 20200519