Ultrasonic detection narrow pulsewidth laser sludge remover and its sludge removing method

An ultrasonic detection and narrow pulse width technology, which is applied in the field of laser technology, can solve the problems of lack of monitoring means, medium denaturation, damage, etc., and achieves high decontamination efficiency, low energy consumption, and good decontamination effect.

Inactive Publication Date: 2008-03-19
NANKAI UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

This not only increases the cost of cleaning, but also limits its scope of use and objects
[0010] At present, laser devices commonly used in laser decontamination devices are mainly continuous CO2 lasers or quasi-continuous Nd: YAG lasers, which use the laser ablation effect mentioned above to remove dirt. The decontamination effect of this type of laser decontamination device Although it is acceptable, due to the ablation effect, the laser energy is generally difficult to control and lacks effective monitoring methods. This will not only fail to improve the cleaning efficiency, but also easily cause the medium itself to be denatured or damaged due to the influence of high temperature.

Method used

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  • Ultrasonic detection narrow pulsewidth laser sludge remover and its sludge removing method
  • Ultrasonic detection narrow pulsewidth laser sludge remover and its sludge removing method
  • Ultrasonic detection narrow pulsewidth laser sludge remover and its sludge removing method

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0045] Embodiment 1: remove the car paint layer on the ferroalloy surface

[0046] Implementation steps:

[0047] (1) According to the specific sample and dirt properties, input the laser working parameters through the automatic control device. The working parameters of the laser are: 1064nmNd: YAG laser or other types of lasers, the pulse width is, for example, 15ns, 10ns, 5ns or other pulse widths suitable for the working process, and the single pulse energy is 500mJ, 200mJ or within the range of 100mJ to 10J according to The specific situation of the dirt is determined; the repetition frequency ranges from 20Hz to 60Hz. For car paint removal on ferroalloy surfaces, the laser operating parameters are: 1064nm Nd:YAG laser, pulse width 15ns, single pulse energy 500mJ, repetition frequency 20Hz. If it is not clear that the required laser pulse energy can also be set to 0J, the automatic control device will use the trial and division method for preprocessing to select the appr...

Embodiment 2

[0054] Embodiment 2: remove the rust layer of medium corrosion degree on the iron plate surface

[0055] This embodiment is basically the same as Embodiment 1, the difference is:

[0056] (1) The energy density required for rust removal is higher than that for paint removal, so the laser energy in the laser working parameters should be increased, which can be 600mJ, and other parameters can remain unchanged.

[0057] (2) For some local rusts whose shapes are not very standard, this device also adds manual control on the basis of automatic control, and the two can be switched at will. In this way, during the laser derusting process, when the automatic scanning of the laser in a certain direction is close to the irregular edge of rust, it can be switched to manual control, so that the laser stops working, and then the mobile platform device is controlled to locate the next decontamination position before starting the laser. Start working and switch to automatic control at the s...

Embodiment 3

[0058]Embodiment 3: remove the paint or other dirt on the object surface with local irregular shape (larger object surface radian)

[0059] According to the specific sample and dirt properties, the laser working parameters are input through the automatic control device. The working parameters of the laser are: 1064nmNd: YAG laser or other types of lasers, the pulse width is, for example, 15ns, 10ns, 5ns or other pulse widths suitable for the working process, and the single pulse energy is 500mJ, 200mJ or within the range of 100mJ to 10J according to The specific situation of the dirt is determined; the repetition frequency ranges from 20Hz to 60Hz. If it is not clear that the required laser pulse energy can also be set to 0J, the automatic control device will use the trial and division method for preprocessing to select the appropriate energy range during the cleaning process; or choose from the parameters given by the feedback control device, control The software of the syst...

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Abstract

An ultrasonic detection narrow pulse wide laser cleaner includes a narrow pulse wide laser device (1), a beam adjustment transmission device (2), a moving platform device (3), an ultrasonic detection device (4), an automatic control device (5), a dust absorption recovery device (6) and an ultrasonic detection narrow pulse wide laser filth clearing method. A cleaned object surface is irradiated with narrow pulse wide lasers. And a strong vibration shock wave is produced in short time to remove filths from the medium surface. At the same time, an instrument device is used to monitor and analyze ultrasonic waves caused by the vibration during the cleaning process to ensure the good medium surface and realize the automatic cleaning process. The cleaner is used to remove various filths of oxides, corrosion matters, paint, grease marks, residues, etc. of the media surfaces of metals, semiconductors, buildings, etc. The cleaner has the advantages of good effect, non-damages, high efficiency, automation, etc.

Description

【Technical field】 [0001] The invention belongs to the application field of laser technology, and relates to a method of using the effect of the interaction between a narrow pulse width laser and a substance to remove oxides, rust, paint, oil stains, residues, etc. on the surface of metals, semiconductors, buildings and other media. At the same time, the ultrasonic signal formed by this effect is used to ensure the integrity of the surface of the decontaminated medium, and it can realize an automatic decontamination device and a method for ultrasonic detection of narrow pulse width laser to remove dirt. 【Background technique】 [0002] During the long-term use of any workpiece or substance, some kind of pollutants will be formed on its surface, or some kind of substance will be attached to it. Their existence will bring harm to the normal use of the substance and need to be removed. At present, the means of removing dirt include manual / mechanical friction method, chemical reag...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B08B7/00B08B15/00B23K26/36B23K26/04B23K26/06B23K26/08B23K26/42G01N29/04B23K26/0622B23K26/70
Inventor 宋峰田彬邹万芳何真刘淑静牛孔贞田建国
Owner NANKAI UNIV
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