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Method and device for removing paint in water

A paint layer and contact surface technology, applied in the field of laser cleaning, can solve the problems of low efficiency, time-consuming and labor-intensive, affecting the efficiency and effect of paint layer removal, achieve high-quality removal, and solve the effect of low-quality removal

Active Publication Date: 2022-03-18
SICHUAN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In order not to affect the quality of the new paint layer, the original paint layer must be cleaned and removed, and the cleanliness of the substrate will even seriously affect the service life of steel products
[0004] In the process of laser removing paint from underwater objects, the selection of laser parameters will greatly affect the removal efficiency and effect of the paint layer
At present, in order to improve the paint removal effect, a liquid confinement layer is often added to the side of the paint layer close to the water. Through a large number of experiments to find out the appropriate laser parameters for paint removal, it is time-consuming and laborious, and the efficiency is very low.

Method used

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  • Method and device for removing paint in water
  • Method and device for removing paint in water
  • Method and device for removing paint in water

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Experimental program
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Effect test

Embodiment 1

[0051] Such as figure 1 As shown, the present invention provides a method for removing paint in water in Embodiment 1, and S1-S4 in the figure corresponds to each step in the method. Methods include:

[0052]S1. Determine the peak impact strength of the laser pulse coupled into the paint layer in water according to the acoustic impedance parameters of the laser pulse in water;

[0053] S2. Based on the law of conservation of momentum, determine the coefficient of the contact surface between the water and the paint layer and the coefficient of the contact surface between the paint layer and the substrate according to the peak impact force intensity of the laser pulse coupled into the paint layer in water;

[0054] S3. Determine the energy density range of the laser pulse according to the coefficient of the contact surface of the water and the paint layer and the coefficient of the contact surface of the paint layer and the substrate;

[0055] S4. Using laser pulses with an en...

Embodiment 2

[0125] Such as figure 2 As shown, the present invention provides a kind of paint removal device in water in embodiment 2, realizes based on the paint removal method in water as described in embodiment 1, comprises:

[0126] A first calculation module 1 , a second calculation module 2 , a third calculation module 3 and a laser application module 4 .

[0127] in,

[0128] The first calculation module 1 is used to determine the peak impact force intensity of the laser pulse coupled into the paint layer in water according to the acoustic impedance parameters of the laser pulse in water;

[0129] The second calculation module 2 is used to determine the coefficient of the contact surface between the water and the paint layer and the coefficient of the contact surface between the paint layer and the substrate according to the peak impact force intensity of the laser pulse coupled into the paint layer in water based on the law of conservation of momentum;

[0130] The third calcula...

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Abstract

The invention relates to the technical field of laser cleaning, in particular to a method and device for removing paint in water. The method includes: determining the peak impact force intensity of the laser pulse coupled into the paint layer in water according to the acoustic impedance parameters of the laser pulse in water; The coefficient of the contact surface of the layer and the coefficient of the contact surface of the paint layer and the substrate; the energy density range of the laser pulse is determined according to the coefficient of the contact surface of water and the paint layer and the coefficient of the contact surface of the paint layer and the substrate. In practical applications, as long as the selected laser energy density is within the determined laser pulse energy density range, the laser pulse can be used to remove the paint layer in water with high efficiency and high quality.

Description

technical field [0001] The invention relates to the technical field of laser cleaning, in particular to a method and device for removing paint in water. Background technique [0002] In recent years, with the rapid development of optical technology and the continuous improvement of laser performance, it is possible to use laser to remove a large area of ​​paint. [0003] For objects that have been in water for a long time, such as ships and large bridges, the surface coating is often peeled off due to water erosion, and regular inspection and maintenance are required. In order not to affect the quality of the new paint layer, the original paint layer must be cleaned and removed, and the cleanliness of the substrate may even seriously affect the service life of steel products. [0004] In the process of laser removing paint from underwater objects, the selection of laser parameters will greatly affect the removal efficiency and effect of the paint layer. At present, in orde...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B08B7/00B08B13/00
CPCB08B7/0042B08B13/00
Inventor 韩敬华冯国英何长涛张丽君李玮
Owner SICHUAN UNIV
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