A new three-dimensional laser forming method of metal foil, which is caused by the shrinkage of the target due to the laser beam irradiation, has already been proposed. The present paper deals with a newly developed forming of rather thick sheet; a steel sheet of 0.4 mm in thickness is kept flat with a magnetic chuck and a CO2 laser beam of 60 W is irradiated on the surface of the sheet at a speed of 800 mm/min and at a pitch of 1 mm. When the sheet is detached from the chuck, it becomes concave. The irradiated zone of the sheet is shrunk by 2.5 %. A circular sheet of 100 mm in diameter is adopted as a target. When the laser beam is irradiated on a restricted region of the sheet, which is like an asterisk mark, the sheet is formed into a dish. In the present paper, the detailed procedure of this new forming process is described.

Topics
Materials forming
1.
S.
Yoshioka
,
T.
Miyazaki
T.
Mise
,
R.
Oba
 and,
M.
Saito
:
Laser forming of thin foil by a newly developed sample holding method
,
Laser Material Processing & Interaction
, Vol.
15
, No.
2
,
96
–
100
(
2003
).
Google Scholar
 
2.
F.
Vollertsen
, “
Mechanisms and models for laser forming
”,
Proceedings of the LANE’94
,
1
,
345
–
360
(
1994
).
3.
T.
Miyazaki
,
M.
Saito
,
S.
Yoshioka
,
T.
Tokunaga
,
T.
Misu
 and
R.
Oba
 “
Forming of Thin Sheet with Diode Laser
”,
Proceedings of the ICALEO
2001
,
1331
–
1345
(
2001
).
This content is only available via PDF.
© 2003 Laser Institute of America.
2003
Laser Institute of America
You do not currently have access to this content.