Laser shock forming method for compound eye-like double-scale curved surface structure surface

A curved surface structure and laser shock technology, which is applied in laser welding equipment, welding equipment, metal processing equipment, etc., can solve problems such as difficult forming, and achieve the effect of reducing the stroke and making mold preparation convenient and fast

Pending Publication Date: 2022-04-15
JIANGSU UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the general laser shock forming is mainly used for the impact forming of microstructures on a plane, and it is difficult to be used for the formation of microstructures on a curved surface.

Method used

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  • Laser shock forming method for compound eye-like double-scale curved surface structure surface
  • Laser shock forming method for compound eye-like double-scale curved surface structure surface
  • Laser shock forming method for compound eye-like double-scale curved surface structure surface

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0059] Example 1 (the forming foil is made of aluminum foil with a thickness of 10 μm, the millimeter-scale curved surface on the mold steel plate is a laser direct writing surface, the micron-scale structure is a laser scanning induced processing structure, the thickness of the glass plate is 5mm, and the laser energy absorption layer material is industrial Black paint with a thickness of about 50 μm. The elastic polymer sheet is a polydimethylsiloxane (PDMS) sheet with a thickness of 3 mm. The laser processing system is a nanosecond fiber laser marking machine with a wavelength of 1064 nm. The laser pulse width 300ns)

[0060] The laser direct writing method was used to prepare Ф5mm pits on the surface of the 7mm thick mold steel, and the micropore array was prepared in the water environment by laser scanning to induce micropores (Applied Surface Science 462 (2018) 847–855). Afterwards, the surface of the mold steel is ground and polished to remove surface spatter. Install ...

Embodiment 2

[0061] Example 2 (the forming foil is made of aluminum foil with a thickness of 10 μm, the millimeter-scale curved surface on the mold steel plate is a laser direct writing surface, the micron hole array template foil is a Ф5 mm copper mesh purchased on the market, and the diameter of the copper mesh is 30 μm. The thickness of the glass plate is 5 mm, the material of the laser energy absorbing layer is industrial black paint, the thickness is about 50 μm, the elastic polymer sheet is a polydimethylsiloxane (PDMS) sheet with a thickness of 3 mm, and the laser processing system has a wavelength of 1064nm nanosecond fiber laser marking machine, laser pulse width is 300ns)

[0062] The pits of Ф3mm were prepared on the surface of 7mm thick die steel by laser direct writing process. Afterwards, the surface of the mold steel is ground and polished to remove surface spatter. The mold steel plate, the micro-hole array foil, the formed aluminum foil, the polydimethylsiloxane (PDMS) sh...

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Abstract

The invention discloses a laser shock forming method for a compound eye-like double-scale curved surface structure surface, and relates to the technical field of functional surface preparation. A pit-shaped structure is formed in a template/lower template; a foil material, a transparent elastic polymer sheet material, a light-transmitting glass plate and a clamp top plate are sequentially arranged above the template/lower template, and the lower part of the transparent elastic polymer sheet material is coated with an absorbing layer; wherein a plurality of micropores are formed in the pit-shaped structure, or a plurality of micropores are formed in the template foil, and the template foil is arranged below the foil; the clamp is placed on a laser machining system platform; drawing a laser scanning path and setting scanning parameters in software of the laser processing system according to the requirements of the forming structure; and laser is started, so that laser scanning machining of the surface is achieved, and the formed foil is obtained. A foil material is pre-deformed by utilizing a transparent elastic polymer sheet material, and then the formation of a micron bulge structure and the shaping of a millimeter-sized bulge curved surface are realized through a laser shock forming process, so that the compound eye-like double-scale curved surface structure surface is obtained.

Description

technical field [0001] The invention relates to the technical field of preparation of functional surfaces, in particular to a laser shock forming method for compound eye-like double-scale curved surface structure surfaces, and the method is suitable for the preparation of compound eye-like double-scale curved surface structure surfaces. Background technique [0002] Compound-eye-like dual-scale curved surface structure refers to a double-scale curved surface with a micron-scale convex surface array on a millimeter-scale convex surface. Such a surface can be used to realize bionic vision research, and has potential application value in bionic vision. It has received extensive attention in recent years. [0003] Compound eye-like dual-scale curved surface structures usually require the preparation of micron-scale convex surface arrays on millimeter-scale surfaces, and have high requirements for the shape of micron-scale convex surfaces. In the general micromachining process, ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B23K26/356
Inventor 李健金卫凤王琳琳洪伟
Owner JIANGSU UNIV
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