Laser shock treatment device taking flowable liquid as energy absorption layer

A technology of energy absorption and flowing liquid, applied in laser welding equipment, manufacturing tools, welding equipment, etc., can solve the problems of low efficiency, affecting the popularization and application of laser shock processing technology, poor operability, etc. Industrialization promotion and application, stable impact effect

Active Publication Date: 2013-06-12
JIANGSU UNIV
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  • Abstract
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  • Application Information

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Problems solved by technology

Poor operability and low efficiency greatly affect the popularization and application of laser shock processing technology

Method used

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  • Laser shock treatment device taking flowable liquid as energy absorption layer
  • Laser shock treatment device taking flowable liquid as energy absorption layer

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Embodiment Construction

[0013] Such as figure 1 As shown, taking multiple continuous laser shocks at the same point as an example, the laser shock energy source is Nd 3+ : The pulse width of the 1064nm laser output by YAG is on the order of nanoseconds. The liquid in the flowable constrained layer can be any liquid with high transmittance to the incident laser. In this embodiment, water is selected as the liquid in the constrained layer; the liquid in the absorbing layer can be any liquid that strongly absorbs the incident laser. In this embodiment, liquid The black paint is used as a flowable absorbing layer liquid, and the black paint can also be diluted with a diluent to adjust the proportion of black paint in the absorbing layer liquid to obtain different light absorption efficiencies.

[0014] Such as figure 2 As shown, the cross-sectional shapes of the two channels of the dual-channel pipeline 4 are rectangular, the length of the rectangular cross-section of the constrained layer channel 9 i...

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Abstract

The invention discloses a laser shock treatment device taking flowable liquid as an energy absorption layer, and belongs to the technical field of laser processing. According to the laser shock treatment device, the laser shock energy absorption layer and a restraint layer are the flowable liquid; an absorption layer pump and a restraint layer pump inject the absorption layer and the restraint layer to the surface of a workpiece through a dual-channel pipeline, and continue to work to allow the absorption layer and the restraint layer to be in flowing states all the time; a control system controls flow velocities of the restraint layer and the absorption layer that flow through the surface of the workpiece through controlling flow rates of the two pumps, and allows the flow velocities of the two pumps to be the same; the flow velocities are less than a critical flow velocity maintaining the restraint layer and the absorption layer to be in laminar states; and the flowing restraint layer and the flowing absorption layer that are distinct in gradation, and stable in state and are in the laminar states are obtained. Serving as a convenient on-line updating method of the absorption layer, the laser shock treatment device can ensure that the energy absorption efficiency of each laser pulse is the same, is stable in shock effect, and is particularly applicable to same-point multiple continuous laser shock and high-density continuous laser shock courses.

Description

technical field [0001] The invention belongs to the technical field of laser processing, in particular to a laser shock processing method and device using a flowable liquid as an energy absorbing layer. Background technique [0002] The typical process of laser shock processing is as follows: the surface of the workpiece to be processed is covered with an absorbing layer and a constrained layer in turn, the laser penetrates through the constrained layer, irradiates the workpiece vertically, is absorbed by the absorbing layer, and the absorbing layer is gasified, ionized, exploded, and expanded, and induced on the surface of the workpiece High-pressure mechanical shock waves and ultra-high-pressure mechanical shock waves act on the surface of the workpiece to induce residual compressive stress on the surface of the workpiece. The above mechanical effects can be used to strengthen metal workpieces or cause plastic deformation of the workpiece. Among them, the role of the confi...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B23K26/00B23K26/18C21D1/68C21D1/09B23K26/356
Inventor 叶云霞张朝阳冯亚云孙亮高明光
Owner JIANGSU UNIV
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