Femtosecond laser cleaning method for 3D printing metal surface

A 3D printing and femtosecond laser technology, applied in cleaning methods and appliances, laser welding equipment, metal processing equipment, etc., can solve problems such as inability to guarantee polishing, surface performance and mechanical properties, and affect overall shape and mechanical properties

Pending Publication Date: 2021-02-19
HEBEI UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

On the other hand, continuous laser (infrared wavelength laser) or long pulse laser may cause surface defects due to excessive energy input, which may affect the overall shape and mechanical properties, and cannot guarantee the balance between polishing and surface properties and mechanical properties during polishing

Method used

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  • Femtosecond laser cleaning method for 3D printing metal surface
  • Femtosecond laser cleaning method for 3D printing metal surface
  • Femtosecond laser cleaning method for 3D printing metal surface

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0043] On laser cleaning equipment (such as figure 1 As shown in the figure: 1 is visual scanning; 2 is vibrating mirror; 3 is visual scanning; 4 is mobile platform; 5 is blowing device. ) to realize the cleaning of Ti6Al4V manufactured by additive materials, the process flow is as follows figure 2 The specific steps shown are as follows:

[0044] (1) Fix the Ti6Al4V metal component on the fixture of the numerically controlled three-dimensional translation table, and the surface of the workpiece can form a certain angle with the incident direction of the laser. In the embodiment of the present invention, the incident direction of the laser is perpendicular to the surface of the workpiece to be processed.

[0045] (2) Use the visual inspection system to determine the three-dimensional shape and coordinate parameters of the target component, determine the three-dimensional shape and coordinate parameters of the target component surface, and establish a three-dimensional digita...

Embodiment 2

[0051] The laser cleaning equipment is used to clean the 316L steel manufactured by additives. The specific steps are as follows:

[0052] (1) The 316L steel metal component is fixed on the fixture of the numerical control three-dimensional translation table, and the surface of the workpiece can be at a certain angle with the incident direction of the laser. In the embodiment of the present invention, the incident direction of the laser is perpendicular to the surface of the workpiece to be processed.

[0053] (2) Use the visual inspection system to determine the three-dimensional shape and coordinate parameters of the target component, determine the three-dimensional shape and coordinate parameters of the target component surface, and establish a three-dimensional digital model for the subsequent automatic cleaning of complex surfaces, so as to realize the automatic cleaning process of complex curved surfaces .

[0054] (3) Use the visual inspection system to detect the gray ...

Embodiment 3

[0059] The laser cleaning equipment is used to clean the copper alloy manufactured by additive, and the specific steps are as follows:

[0060] (1) The copper alloy steel metal component is fixed on the fixture of the numerical control three-dimensional translation table, and the surface of the workpiece can be at a certain angle with the incident direction of the laser. In the embodiment of the present invention, the incident direction of the laser is perpendicular to the surface of the workpiece to be processed.

[0061] (2) Use the visual inspection system to determine the three-dimensional shape and coordinate parameters of the target component, determine the three-dimensional shape and coordinate parameters of the target component surface, and establish a three-dimensional digital model for the subsequent automatic cleaning of complex surfaces, so as to realize the automatic cleaning process of complex curved surfaces .

[0062] (3) Use the visual inspection system to det...

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Abstract

The invention discloses a femtosecond laser cleaning method for a 3D printing metal surface. According to the femtosecond laser cleaning method, the combination of femtosecond pulse laser and a scanning galvanometer system are adopted to clean the complex surface of a 3D printing metal component, so that the surface roughness of the 3D printing metal component is reduced, and the surface quality is improved. By adopting the surface treatment method, the surface roughness (Ra) of the 3D printing metal component can be reduced from 20 [mu]m to 2 [mu]m, and the application range of a 3D printingproduct is further expanded. According to the surface cleaning method, compared with a traditional grinding and polishing process, laser polishing is free of pollution and high in efficiency, a heat affected zone in the machining process is small, rapid and automatic complex surface cleaning treatment can be achieved under the condition that a component base body is not damaged, micropores and cracks are repaired in the cleaning process, crack initiation is reduced, and the fatigue life of samples is obviously prolonged. The method has an important application prospect in the aspect of 3D printing metal component post-treatment.

Description

technical field [0001] The invention belongs to the field of laser surface treatment and relates to 3D printing technology, in particular to a femtosecond laser cleaning method for 3D printed metal surfaces. Background technique [0002] Additive manufacturing has the advantage of making lighter parts and better biocompatibility. It is being widely used in aerospace, medical device development, especially implants with complex surfaces, microstructural porosity, and patient-specific geometries. Although 3D printing has shown great advantages in many aspects, its forming principle determines that the surface morphology of 3D printed products is poor and the surface roughness is high, which is difficult to meet the standards required by industrial use. Compared with conventionally produced parts, the main problems of the surface manufactured by additive technology are usually higher surface roughness, incomplete melting of particles, easy to fall off, and other shortcomings. ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B23K26/352B23K26/354B23K26/36B08B7/00
CPCB23K26/352B23K26/354B23K26/36B08B7/0042
Inventor 梁春永胡亚洲刘宁邹显睿王洪水杨泰
Owner HEBEI UNIV OF TECH
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