Experimental Study on Laser Polarization Properties in Laser Micro-Bending Processes

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Experimental Study on Laser Polarization Properties in Laser Micro-Bending Processes

更新时间：2025-07-09

- Experimental Study on Laser Polarization Properties in Laser Micro-Bending Processes
- Vol. 43, Issue 7, Pages: 96-100(2009)
- 作者机构：
  
  山东大学模具工程技术研究中心,济南,250061
- 作者简介：
- 基金信息：
- DOI：
  CLC： TG665;TN249
- Online First：10 July 2009，
  
  Published：2009
- 稿件说明：
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Experimental Study on Laser Polarization Properties in Laser Micro-Bending Processes[J]. 2009, 43(7): 96-100.
DOI：

Experimental Study on Laser Polarization Properties in Laser Micro-Bending Processes[J]. 2009, 43(7): 96-100. DOI：

摘要

根据激光的偏振特性影响金属材料对激光的吸收这一特点

通过改变激光扫描工件表面的入射角

提高了金属表面对CO

激光能量的吸收率

使厚度为0.1 mm的微尺度不锈钢工件在未进行黑化处理的情况下获得了弯曲变形.实验结果表明

在采用线偏振激光对具有吸收层的工件进行多次扫描时

由于变形部分入射角增大引起激光吸收率提高

以及光斑面积增大引起激光功率下降

从而导致作用于工件表面的激光能量因素改变

这是弯曲角度发生变化的主要原因.

Abstract

The influence of the beam polarization in laser bending process is experimentally investigate. With the beam polarization of laser

the laser absorption of the metallic specimen can be enhanced by increasing the incident angle. The bend angles are achieved in stainless foil specimens without absorptive coatings

and larger bend angles can be obtained by single laser scanning with higher incident angles. Multi-pass laser bending experiments are also carried out on the same material with graphite coatings. The results show that the bend angle per pass is affected obviously by the beam polarization

and the bend angle per pass increases significantly while the total bend angle gets big enough. Using polarized light

the laser beam distortion and laser absorption change induced by the variation of the absorptive coatings and laser incident angle are the two main factors affecting the coupled laser energy. The bending rule is the synthesis effect of the above two factors.

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references

管延锦,孙胜,赵国群,等.预约束应力作用下的激光弯曲成形仿真工艺研究[J].中国激光, 2002, 29(8): 755-758.

GUAN Yanjin, SUN Sheng, ZHAO Guoqun, et al. Simulation of the laser bending process of sheet metals with pre-stresses [J]. Chinese Journal of Lasers, 2002, 29(8): 755-758.

ZHANG Richard X, XU Xianfan. High precision microscale bending by pulsed and CW lasers [J]. Transactions of the ASME, 2003, 125(3): 512-518.

刘杰, 孙胜, 管延锦. 微尺度激光弯曲成形数值模拟与实验研究[J].中国激光, 2008, 35(2): 276-280.

LIU Jie, SUN Sheng, GUAN Yanjin. Numerical and experimental study on the laser micro-bending process [J]. Chinese Journal of Lasers, 2008, 35(2): 276-280.

刘杰, 孙胜, 管延锦. 预应力作用下微尺度激光弯曲成形的数值模拟[J].中国激光, 2008, 35(8): 1265-1270.

LIU Jie, SUN Sheng, GUAN Yanjin. Numerical study on the laser bending of stainless steel foil with pre-stresses [J]. Chinese Journal of Lasers, 2008, 35(8): 1265-1270.

YOSHIOKA S, MIYAZAKI T, MISU T, et al. Laser forming of thin foil by a newly developed sample holding method [J]. Journal of Laser Applications, 2003, 15(2): 96-100.

李力钧. 现代激光加工及其装备[M]. 北京: 北京理工大学出版社, 1993.

EDWARDSON S P, ABED E, CAREY C, et al. Key factors influencing the bend per pass in laser forming [C]∥ Proceedings of Laser Materials Processing Conference. Orlando, Florida, USA: Laser Institute of America, 2007: 508-514.

EDWARDSON S P, ABED E, BARTOWIAK K, et al. Geometrical influences on multi-pass laser forming [J]. Journal of Physics, D: Applied Physics, 2006, 39(2): 382-389.

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