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Heat flux based laser cleaning quality online detection system and method

A laser cleaning and detection system technology, which is applied in the field of laser cleaning, can solve the problems of difficult micron-level defect detection, difficult to guarantee detection accuracy, and does not support online detection, etc., and achieves the effect of not being easy to interfere, simple in structure, and improving detection accuracy

Active Publication Date: 2021-11-16
SHENYANG POLYTECHNIC UNIV
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AI Technical Summary

Problems solved by technology

Traditional detection methods such as magnetic particle, eddy current, and penetration have shortcomings such as low detection accuracy, need for contact detection, and offline detection. Some detection methods require the use of chemical reagents, which will inevitably pollute materials or the environment; many traditional detection methods require contact. It is inconvenient to use and does not support online detection; these technical means also have the disadvantage of low detection accuracy, and it is difficult to detect very small defects on the surface of the workpiece
At the same time, most of the various online testing equipment currently on the market focus on the detection of laser cleaning cleanliness, while ignoring the detection of pore defects generated during the laser cleaning process, which has caused great safety hazards for the workpiece to be put into industrial production later. Moreover, most of these online detection methods work with a single sensor, and its detection accuracy is difficult to guarantee, and it is difficult to realize the detection of micron-level defects.

Method used

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  • Heat flux based laser cleaning quality online detection system and method
  • Heat flux based laser cleaning quality online detection system and method
  • Heat flux based laser cleaning quality online detection system and method

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Embodiment Construction

[0041] Next, the structure, principle and specific implementation method of the present invention will be described in more detail with reference to the accompanying drawings.

[0042] Such as Figure 1~6 As shown, a laser cleaning quality online detection system based on heat flux, the support structure of the system is connected with a laser cleaning detection device 27 through a sliding connection, and the laser cleaning detection device 27 is used to clean the workpiece and to detect the laser cleaning quality and stomatal defects. Such as Figure 6 As shown, the laser cleaning and detection device 27 is a box structure similar to a cuboid, and the laser cleaning and detection device 27 is internally provided with a light outlet 4, a beam splitting prism 3, a laser head 2, a reflector 7, a cylindrical lens 8, a vibrating mirror 9, a laser Clean the lower surface of the detection device 27 (such as Figure 5 and 6 The lower surface of the lower surface) is provided with a...

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Abstract

The invention relates to a heat flux based laser cleaning quality online detection system and a method. A supporting structure of the system is connected with a laser cleaning detection device through a sliding connecting piece. The method comprises the steps that a heat flux sensor is started to correct the cleaning environment temperature, and a laser cleaning module is started to carry out laser cleaning on a workpiece; and a scanning laser detection module is started, when the heat flux, detected by the heat flux sensor, of the workpiece surface is equal to the heat flux of a workpiece base material, a linear scanning laser detection module determines that the workpiece surface is free of areas where protrusions and pits are located, and cleaning is finished. The air hole defect generated by workpiece cleaning is detected by utilizing different convection heat conduction coefficients between different materials on the workpiece surface and the atmosphere and different convection heat conduction coefficients between different shapes of the workpiece surface and the atmosphere, and the problems that only one of cleaning quality and workpiece flaw detection of the previous laser cleaning detection technology is considered, and cleaning quality and workpiece flaw detection cannot be considered at the same time are solved.

Description

technical field [0001] The invention relates to the field of laser cleaning, in particular to an online detection system and method for laser cleaning quality based on heat flux. Background technique [0002] In the process of industrial production, cleaning the surface of workpieces has always been a very important link. Traditional cleaning technologies, such as chemical reagent cleaning and physical grinding and cleaning, have complicated cleaning procedures, heavy pollution, difficult to guarantee cleaning effects, and easy damage to materials. The surface is damaged, which largely restricts the development of the cleaning industry. Since the birth of laser cleaning technology, laser cleaning has unique advantages compared with traditional cleaning processes. Its cleaning effect is non-contact, non-destructive, chemical-free, and pollution-free. It is environmentally friendly, localized non-destructive high-precision cleaning, and safe and convenient to operate. , Easy ...

Claims

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Application Information

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IPC IPC(8): B08B7/00B08B13/00G01N25/72G01N25/20
CPCB08B7/0042B08B13/00G01N25/72G01N25/20
Inventor 王蔚李相锦刘伟军李强沈杰
Owner SHENYANG POLYTECHNIC UNIV
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