Study on sheet metal punched by laser shock waves
-
Corresponding author:
ZHANG Yong-kang, ykzhang@ujs.edu.cn
;
-
Received Date:
2006-09-25
Accepted Date:
2006-11-16
-
Abstract
Laser punching technique is a new idea about hole-forming of sheet metal which is based on the effects of shock waves induced by laser and the high speed punching process.The theoretical minimum movement velocity for the sheet to be punched by laser shock waves was deduced.Also,the mechanism and the punching properties was analyzed on the basis of laser shock forming technology.To test the feasibility of laser punching,a corresponding experiment was designed.In the experiment,a neodymium glass high-power laser was adopted to irradiate the black coating painted on the surface of the 0.4mm thick aluminum sheet through the overlay-K9 glass,and the coating was gasified immediately into high-pressure plasma to generate a hole in the sample.The experimental results show there is no obvious distortion around the hole;the edge of hole is smooth;and the size of hole is dependent on the concave die.So,the laser punching technique can be used as an effective method for hole-forming.
-
-
References
[1]
|
HACKEL,LIOYD,HARRIS et al.Contour forming of metals by laser peening[P].US,6410884,2002-07-25. |
[2]
|
SU H L,LU B J.Prole to working progress of drilling holes in thin plates[J].Mechanical Engineer,2003(3):65~66(in Chinese). |
[3]
|
TRAINOR R J,LEE Y T.Analytic models for design of laser-generated shock-wave experiments[J].Physics of Fluids,1982,25(10):1898. |
[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]
|
PIRRI A N.Theory for momentum transfer to a surface with a high-power laser[J].Physics Fluid,1976,16 (9):1435~1440. |
[6]
|
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. |
[7]
|
BAI Y L.Adiabatic shear banding[J].Research in Mechanica,1990,31(2):133~203. |
[8]
|
YANG Zh Y,ZHAO J P.The review of the microstructure of adiabatic shear bands in metallic materials[J].Journal of North University of China,1995,16 (4):327~333(in Chinese). |
[9]
|
WANG L L,YU T X,LI Y Ch.Progress of impact dynamics[M].Heifei:University of Science and Technology of China Press,1992.2~6(in Chinese). |
[10]
|
YANG Y,CHEN X L.Current status and trends in researches on adiabatic shearing[J].The Chinese Journal of Nonferrous Metals,2002,12(3):401~408(in Chinese). |
-
-
Proportional views
-