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Laser polishing method

A laser polishing and laser technology, which is applied in the field of laser polishing, can solve the problems of 3D printing metal objects, such as the change of chemical composition is not yet clear, the absorption process is complicated, etc., and achieve the effect of superior surface finish, advanced technology and strong practicability

Active Publication Date: 2019-05-17
THE HONG KONG POLYTECHNIC UNIV
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Problems solved by technology

In addition, the absorption process of laser energy by metal materials is complex and depends on the sample temperature, energy deposition rate and laser wavelength
No effect of laser pulses on the surface roughness of 3D printed metal objects has been found
[0009] Problem 4: The chemical composition of 3D printed metal objects before and after laser polishing has not yet been clarified

Method used

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Embodiment Construction

[0032] Such as figure 1 as shown, figure 1 A flowchart of a laser polishing method according to an embodiment of the present invention is shown, and the laser polishing method includes the following steps:

[0033] Step S1, manufacturing 3D metal objects by additive manufacturing technology;

[0034] Step S2, using the robotic arm control system to lift the 3D metal object, and adjust the orientation of the laser processing area of ​​the 3D metal object;

[0035] Step S3, forming an inert gas environment around the laser processing area of ​​the 3D metal object, and then performing laser radiation on the laser processing area of ​​the 3D metal object.

[0036] The above technical solution is a novel laser polishing technology that can effectively polish the surface of a 3D metal object manufactured by 3D printing. Polishing techniques by employing laser radiation can help to re-melt thin surface layers of 3D metal objects and can achieve smoothing of the surface roughness o...

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Abstract

The invention provides a laser polishing method. The method comprises the following steps of S1, 3D metal objects are manufactured by additive manufacturing techniques; step S2, a mechanical arm control system is used to lift a 3D metal object, and adjusting the orientation of the laser processing region of the 3D metal object; and S3, an inert gas environment is formed around the laser processingregion of the 3D metal object, and laser radiation is carried out on the laser processing region of the 3D metal object. The novel laser polishing technology provides a highly flexible polishing solution for 3D printed metal products, the technology is advanced and strong in practicability, and the technical effect that the traditional metal polishing technology cannot be achieved is achieved.

Description

technical field [0001] The invention relates to the field of additive manufacturing, in particular to a laser polishing method. Background technique [0002] Additive manufacturing (AM) has evolved from 3D printers and has been used to produce complex three-dimensional objects. The four typical processes for additive manufacturing of 3D metal printing are selective laser sintering (SLS), direct metal laser sintering (DMLS), selective laser melting (SLM) and electron beam melting (EBM). These processes are similar and all involve the use of a laser or beam of light to melt or fuse metal powder on a powder bed. However, no matter how the laser or beam parameters in additive manufacturing are optimized, the surface roughness of 3D printed metal objects is always unsatisfactory. For some specific applications, the surface finish produced by additive manufacturing may not be sufficient. For example, medical implants require a smooth surface to inhibit bacterial growth and preve...

Claims

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Application Information

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IPC IPC(8): B23K26/354B23K26/12
Inventor 容锦泉蔡恒生莫晓泳张绍松肖婷予王文静
Owner THE HONG KONG POLYTECHNIC UNIV
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