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Pretreatment method and system for material surface before laser welding

A pretreatment, laser welding technology, applied in laser welding equipment, welding equipment, metal processing equipment and other directions, can solve the problems of low laser reflectivity, laser absorption rate, single material processing, affecting laser welding efficiency, etc., to achieve good heat dissipation , Improve the absorption efficiency, the effect of fast transition time

Active Publication Date: 2017-05-10
美戈利浙江轨道交通研究院有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, no matter which cleaning method is used, the processing of the material is single. The material base material obtained after cleaning has a high laser reflectivity and a low laser absorption rate, which will affect the laser welding efficiency.

Method used

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  • Pretreatment method and system for material surface before laser welding
  • Pretreatment method and system for material surface before laser welding
  • Pretreatment method and system for material surface before laser welding

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Embodiment 1

[0037] figure 1 Shown, a kind of specific embodiment of the method of the present invention is: a kind of pretreatment method of material surface before laser welding, comprises at first cleaning material sample surface by picosecond pulse laser, it is characterized in that: after passing picosecond pulse laser While cleaning the surface of the sample, the image acquisition equipment collects the surface morphology of the sample in real time, and judges whether the surface of the sample is cleaned according to the surface morphology of the sample: if it is not cleaned, continue to clean the surface of the sample with picosecond pulse laser; if it is cleaned , turn off the picosecond pulse laser, and blacken the surface of the sample through the femtosecond laser; while blackening the surface of the sample through the femtosecond laser, the image acquisition equipment monitors the blackening of the sample surface in real time. After blackening, turn off the femtosecond laser to...

Embodiment 2

[0041] figure 2 It is shown that a specific embodiment of the system of the present invention is: a pretreatment system for the surface of materials before laser welding, including a laser processing module, characterized in that: the laser processing module includes laser cleaning for cleaning the surface of the sample 500 The submodule 100 and the laser blackening submodule 200 that blackens the surface of the sample 500; the switching between the laser cleaning submodule 100 and the laser blackening submodule 200 is controlled by the intelligent control module 300, and the intelligent control module 300 includes image acquisition Submodule 310, intelligent judgment submodule 320 and control submodule 330; the image acquisition submodule 310 is used to collect the surface morphology of the sample 500 and is transmitted to the intelligent judgment submodule 320; the intelligent judgment submodule 320 is used for according to the sample 500 The surface morphology judges wheth...

Embodiment 3

[0047] Figure 5 As shown, another specific embodiment of the system of the present invention is: a pretreatment system for the surface of materials before laser welding, including a laser processing module, characterized in that: the laser processing module includes a laser for cleaning the surface of the sample 500 The cleaning sub-module 100 and the laser blackening sub-module 200 for blackening the surface of the sample 500; the switching between the laser cleaning sub-module 100 and the laser blackening sub-module 200 is controlled by an intelligent control module 300, and the intelligent control module 300 includes an image Collection sub-module 310, intelligent judgment sub-module 320 and control sub-module 330; the image collection sub-module 310 is used to collect the surface morphology of the sample 500 and is transmitted to the intelligent judgment sub-module 320; 500 surface morphology judges whether the surface of the sample 500 is cleaned; the control submodule 3...

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Abstract

The invention relates to a pretreatment method and system for a material surface before laser welding. The method comprises the following steps: firstly cleaning the surface of a sample by picosecond pulse laser, acquiring surface morphology of the sample in real time by image acquisition equipment while the surface of the sample is cleaned by virtue of the picosecond pulse laser, and judging whether the surface of the sample is clean or not according to the surface morphology of the sample, if the surface of the sample is not clean, continuing to clean the surface of the sample by virtue of the picoseconds pulse laser; if the surface of the sample is clean, turning off the picoseconds pulse laser, and carrying out blackening treatment on the surface of the sample by virtue of femtosecond laser; during the blackening treatment, monitoring the blackening condition of the surface of the sample in real time by the image acquisition equipment, when the surface of the sample is completely blackened, turning off the femtosecond laser, thus completing pretreatment on the material surface before welding. The method provided by the invention has the advantages that strong reflection action of the sample on lights can disappear, a micro-nano structure is formed on the surface, absorption efficiency of a material on laser in a laser welding process is greatly improved, and laser welding efficiency and quality are effectively improved.

Description

technical field [0001] The invention relates to a method and system for pretreatment of material surfaces before laser welding, and in particular to a femtosecond / picosecond pulse laser composite pretreatment method and pretreatment system for material surfaces before laser welding. Background technique [0002] A large number of high-strength alloy parts need to be used in aerospace, high-speed rail and other products, and its welding method is an important direction in the research of aerospace and high-speed rail. Laser welding has the advantages of no mechanical contact, fast welding speed, and high production efficiency, and has received more and more attention. The treatment of welding materials before laser welding is a key factor affecting the effect of laser welding. Attachments such as oil stains and oxide films on the surface of the alloy will affect the welding quality and efficiency. Removing the attachments of alloy materials before welding is an important st...

Claims

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Application Information

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IPC IPC(8): B23K26/352B23K26/60
CPCB23K26/352B23K26/60
Inventor 汪莎陈辉朱宗涛
Owner 美戈利浙江轨道交通研究院有限公司
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