Unlock instant, AI-driven research and patent intelligence for your innovation.

A Laser Longitudinal Drilling Method Based on Defocus Control Technology

A drilling method and laser technology, used in laser welding equipment, manufacturing tools, metal processing equipment, etc., can solve the problems of affecting the airflow flow of the channel, unable to improve the drilling efficiency of the vibration frequency of the galvanometer, and unable to meet the needs, etc. Processing efficiency, improving drilling efficiency, optimizing the effect of deep hole processing texture

Active Publication Date: 2022-02-25
LASER FUSION RES CENT CHINA ACAD OF ENG PHYSICS
View PDF7 Cites 0 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] At present, there are two problems in the commonly used methods: on the one hand, since the vibration frequency of the vibrating mirror at home and abroad is about hundreds of Hz, to further improve the drilling efficiency, the vibration frequency of the vibrating mirror needs to be optimized, but the current vibrating mirror technology The demand cannot be met yet, that is, the drilling efficiency cannot be improved by increasing the vibration frequency of the galvanometer
On the other hand, the circular cutting method will produce textures perpendicular to the direction of the hole depth, which will affect the flow of air in the channel, and put forward higher requirements for the vibration accuracy of the galvanometer.

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • A Laser Longitudinal Drilling Method Based on Defocus Control Technology
  • A Laser Longitudinal Drilling Method Based on Defocus Control Technology
  • A Laser Longitudinal Drilling Method Based on Defocus Control Technology

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0020] Such as figure 1 As shown, a laser longitudinal drilling method based on defocus control technology, the laser is transmitted through the light guide optical path and then enters the focusing lens 5, the focusing lens 5 focuses the laser on the workpiece, completes the drilling, and at the same time, focuses on the workpiece The focal spot scans and moves along the Z direction reciprocatingly and along the XY plane to realize longitudinal fast scanning ring cutting.

[0021] Along the transmission direction of the laser light, the light guide optical path sequentially includes a wavefront controller 1, a two-dimensional reflection vibrating mirror one 2, a two-dimensional reflection vibrating mirror two 3 and a two-dimensional reflection vibrating mirror three 4, wherein the two-dimensional reflection vibrating mirror The mirror one 2 is arranged obliquely to change the transmission direction of the laser light, and the two-dimensional reflection vibrating mirror one 2 ...

Embodiment 2

[0024] The same part of this embodiment and Embodiment 1 will not be described again, the difference is:

[0025] Taking traditional Gaussian beam focusing processing as an example, set the wavelength of the laser as λ, the focal length of the focusing lens as f, the diameter of the incident beam as D, and the ideal Gaussian beam waist width for processing after focusing is ω 0 , satisfying ω 0 =2.44λf / D. According to the characteristics of the Gaussian beam, the Gaussian beam at the position z from the beam waist has a spherical wavefront, and the radius of curvature R of the wavefront satisfies, When presetting the out-of-focus wavefront, it is necessary to compensate a complementary wavefront, that is, a wavefront with a curvature radius of -R. When the required amount of defocus is That is, the girdle position z needs to be at The range of curvature radius of the preset out-of-focus wavefront can be obtained correspondingly. Rapidly changing the radius of curvature...

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

PUM

No PUM Login to View More

Abstract

The invention relates to a laser longitudinal drilling method based on defocus control technology, which belongs to the field of laser drilling technology. After the laser is transmitted through a light guide path, it is incident on a focusing lens, and the focusing lens focuses the laser on a workpiece to complete drilling and focusing. The focal spot on the workpiece reciprocates along the Z direction and moves along the XY plane. The present invention uses the defocused wavefront control technology to promote the reciprocating movement of the focal spot in the Z direction, realizes kHz wavefront regulation frequency, and completes longitudinal fast cutting , to increase the processing frequency. At the same time, the focal spot moves along the X-Y plane at a relatively low frequency. The laser movement is mainly in the direction of the hole depth, and the direction of the generated texture is along the direction of the hole depth. Cut scanning has a better diversion effect.

Description

technical field [0001] The invention belongs to the technical field of laser drilling, and in particular relates to a laser longitudinal drilling method based on defocus control technology. Background technique [0002] The commonly used methods of laser drilling include circular cutting and helical scanning, etc., through the vibrating mirror to achieve rapid rotation in the xy direction, layer-by-layer ring cutting, and the spatial movement of the lens or lens to realize the slow decline of the processing point in the z direction layer by layer, thereby completing laser drilling. [0003] At present, there are two problems in the commonly used methods: on the one hand, since the vibration frequency of the vibrating mirror at home and abroad is about hundreds of Hz, to further improve the drilling efficiency, the vibration frequency of the vibrating mirror needs to be optimized, but the current vibrating mirror technology The demand cannot be met yet, that is, the drilling ...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

Application Information

Patent Timeline
no application Login to View More
Patent Type & Authority Patents(China)
IPC IPC(8): B23K26/382B23K26/064B23K26/082
CPCB23K26/382B23K26/70
Inventor 孙喜博胡东霞黄晚晴王德恩张颖耿远超刘兰琴邓学伟王文义袁晓东
Owner LASER FUSION RES CENT CHINA ACAD OF ENG PHYSICS