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Laser hot stamping welding method

A welding method and hot stamping technology, applied in the field of additive manufacturing, can solve problems such as the reduction of comprehensive mechanical properties of welded parts, and achieve the effects of novel design ideas, efficient welding operations, and reduced process costs

Pending Publication Date: 2022-03-29
WUHAN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0004] The purpose of the present invention is to provide a laser hot stamping welding method for the deficiencies of the prior art, which can eliminate the residual stress of the welding material, improve the uniformity of the temperature distribution of the additive component, and reduce the internal crack defect of the formed part The probability of initiation, avoiding the problem of the reduction of the comprehensive mechanical properties of weldments caused by traditional welding

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Experimental program
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Embodiment 1

[0035] This embodiment adopts double laser hot stamping to weld copper metal nanowires, such as figure 1 As shown, it is a schematic diagram based on the laser hot stamping welding method in this embodiment, and the specific implementation steps are:

[0036] S1: Clean the substrate 106 with an acetone solvent and an ultrasonic cleaning machine; after cleaning, use a dropper to coat copper metal nanowires 107 on the surface of the substrate 106. Of course, in other embodiments, the surface of the substrate 106 can also be Cover other non-metallic materials or metal-non-metal composite materials as samples to be welded;

[0037] S2: Select JGS2 quartz glass (thickness: 200 μm) as the momentum transmission layer 105, polyimide film (thickness: 500 μm) as the absorbing layer 104, JGS2 quartz glass (thickness: 1mm) as the constraining layer 103, and then the substrate 106 The momentum transmission layer 105, the absorbing layer 104, and the confinement layer 103 are sequentially ...

Embodiment 2

[0040] This embodiment adopts laser beam splitting hot stamping to weld copper metal nanowires, such as figure 1 As shown, it is a schematic diagram based on the laser hot stamping welding method in this embodiment, and the specific implementation steps are:

[0041] S1: cleaning the substrate 106 with an acetone solvent and an ultrasonic cleaning machine; after cleaning, coating copper metal nanowires 107 on the surface of the substrate 106 with a dropper;

[0042] S2: Select polyimide film as the momentum transmission layer 105, polyimide film (500 μm in thickness) as the absorption layer 104, BK7 glass (1 mm in thickness) as the constraining layer 103, and then copper metal nanowires on the substrate 106 The momentum transmission layer 105, the absorption layer 104, and the confinement layer 103 are sequentially stacked on the 107, and the three above the copper metal nanowire 107 are fixedly connected together;

[0043] S2: Choose a nanosecond pulse laser (can emit laser ...

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Abstract

The invention provides a laser hot stamping welding method. The laser hot stamping welding method comprises the following steps that S1, a momentum transmission layer, an absorption layer and a restraint layer are sequentially stacked on a sample to be welded; s2, the first laser beam penetrates through the restraint layer to act on the absorption layer so as to excite plasma, and pressure shock waves are generated; the second laser beam penetrates through the absorption layer and the momentum transmission layer to act on the to-be-welded position of the sample so as to heat the sample to enable the to-be-welded position of the sample to be in a molten or semi-molten state, and impact waves are spread downwards under the action of the restraint layer and act on the to-be-welded position of the sample in the molten or semi-molten state through the momentum transmission layer so as to conduct stamping welding. According to the method, the residual stress of the welding material is eliminated by heating the laser beam, the uniformity of temperature distribution of the additive component is improved, the generation probability of crack defects in the formed part is reduced through the pulse laser beam, and the problem that the comprehensive mechanical property of the welded part is reduced due to traditional welding is solved.

Description

technical field [0001] The invention belongs to the technical field of additive manufacturing, and in particular relates to a laser hot stamping welding method. Background technique [0002] With the development of science and technology, welded parts are required to have more excellent comprehensive mechanical properties under a more efficient welding process. During the interaction between the heat source and the material and the cooling of the material, thermal cracking is easily induced under the action of welding thermal stress and residual stress. In addition, the solidification shrinkage of the material and the volatilization of molten pool elements can also cause porosity defects. Therefore, at this stage, the main technical bottleneck restricting the further development and application of material welding technology is how to suppress the defects in the material welding forming process and effectively improve the welding efficiency. [0003] Heat and force are two...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B23K26/21B23K26/0622
CPCB23K26/21B23K26/0622
Inventor 胡耀武张啸寒刘胜刘健陆恒夏敏
Owner WUHAN UNIV