Investigation of inverse deformation in laser shock forming with half die
-
1.
School of Mechanical Engineering, Jiangsu University, Zhenjiang 212013, China;
-
2.
School of Mechanical and Power Engineering, East China University of Science and Technology, Shanghai 200237, China
-
Corresponding author:
ZHANG Yong-kang, ykzhang@ujs.edu.cn
-
Received Date:
2006-11-24
Accepted Date:
2007-01-04
-
Abstract
In order to investigate the application of laser shock forming with half die in industry,experiments were executed with titanium alloy sheet.Inverse deformation of sample in its partial area was found in laser shock forming process,especially it was more obvious in the center of concave die.The inverse deformation heavily affected the shock forming quality because it made the sheet couldn't touch concave die closely.According to results of experiment and analyses,the sheet with great speed hits the concave die strongly when it touches concave die if laser energy is higher than the needs of deformation,so the sheet obtains an inverse velocity through hitting,and the inverse deformation take place if the inverse velocity beyond the speed threshold value of plastic deformation,which has great effect on the quality of shock forming.A good quality work piece was obtained after adjusting laser energy,which shows that inverse deformation can be avoided under lower laser energy.
-
-
References
[1]
|
GEIGER M,MERKLEIN M,PITZ M.Laser and forming technolo-gy--an idea and the way of implementation[J].Journal of Materials Processing Technology,2004,151(3):3-11. |
[2]
|
ZHOU J Zh,YANG J Ch,ZHANG Y K,et al.A study on super-speed forming of metal sheet by laser shock waves[J].Journal of Materials Processing Technology,2002,129(1):241-244. |
[3]
|
ZHOU J Zh,ZHANG Y K,ZHOU M,et al.Theoretical analysis on deformation of sheet metal under one laser shot loading[J].Chinese Journal of Laser,2005,32(1):135-138(in Chinese). |
[4]
|
ZHOU J Zh,ZHANG Y K,ZHOU M,et al.Study on technique of laser shock forming of metal sheet[J].Laser Technology,2002,26(6):478-480 (in Chinese). |
[5]
|
JIN Ch,YIN S M,CAI W Q,et al.Research on the method of creation of shocked trace during laser shock[J].Laser Technology,2005,29(2):142-144 (in Chinese) |
[6]
|
MEYERS M A,GREGORI F,KAD B K,et al.Laser-induced shockcompression of monocrystalline copper:characterization and analysis[J].Acta Materialia,2003,51(5):1211-1228. |
[7]
|
FABBRO R,FOURNIER J,BALLARD P,et al.Physical study of laser-produced plasma in confined geometry[J].J A P,1990,68(2):775-784. |
[8]
|
ZHOU N,QIAO D J.Materials dynamics under pulse beam radiation[M].Beijing:National Defence Industry Press,2002:81(in Chinese). |
[9]
|
WANG L L.The foundation of stress waves[M].2nd ed.Beijing:National Defence Industry Press,2005:39(in Chinese). |
[10]
|
MA X Q.Shock dynamics[M].Beijing:Beijing Institute of Technology Press,1992:310(in Chinese). |
-
-
Proportional views
-