In CO2-laser remote welding, a laser beam is rapidly deflected by a system of moving mirrors and directed towards the workpiece over distances exceeding 1000 mm. From such an arrangement, various advantages and disadvantages arise.

On one hand, as the mirror system allows positioning speeds exceeding 700 m/s, positioning times nearly negligable. Consequently, it becomes possible to optimize the welding sequence not only in view of cycle time but also in view of distortion. On the other hand, as there is no working head close to the weld, the provision of shielding gas, which is normally required for beam powers exceeding 3 kW, may become a difficult task.

To deal with these topics, at the Bremer Institut für angewandte Strahltechnik, a CO2-Laser remote welding system with 6 kW maximum beam power was utilized to study both the effect of various shielding gas nozzles on weld quality and the effect of heat input and welding sequence on distortion during stitch welding of steel sheet structures. Moreover, strategies to minimize distortion for a variety of model systems have been developed.

1.
D.
Radaj
: Wärmewirkung des Schweißens. Temperaturfeld, Eigenspannung und Verzug,
Berlin, Springer Verlag
,
1988
.
2.
Dilthey
,
U.
;
Trube
,
S.
:
Schweißtechnische Fertigungsverfahren Band 2
:
Verhalten der Werkstoffe beim Schweißen. VDI Verlag, Düsseldorf
,
1995
Google Scholar
 
3.
Grupp
,
M.
;
Seefeld
,
T.
;
Vollertsen
,
F.
:
Laser Beam Welding with Scanner
.
Proc. Laser in Manufacturing 2003
,
AT_Fachverlag
,
Stuttgart
,
2003
, S.
375
–
379
.
Google Scholar
 
4.
Vollertsen
,
F.
;
Seefeld
,
T.
;
Grupp
,
M.
:
Remote Welding at High Laser Power
. In:
Proc. of 22th international conference on applications of laser and electro-optics 2003 (ICALEO)
, LIA Congress Proceedings,
Jacksonville (Fl), USA
, CD-ROM,
2003
.
Google Scholar
Crossref
Search ADS
 
5.
Thomy
,
C.
;
Grupp
,
M.
;
Seefeld
,
T.
;
Sepold
,
G.
;
Vollertsen
,
F.
:
Remote Welding of Steel and Aluminium Alloys at High Laser Power
. In:
Proc. Laser Assisted Netshape Engineering
, (LANE)
2004
, Ed.:
Geiger
,
M.
;
Otto
,
A.
,
Meisenbach Verlag, Bamberg
, 2004, S.
211
–
222
Google Scholar
 
6.
Malisius
,
R.
:
Schrumpfungen, Spannungen und Risse beim Schweißen. Fachbuchreihe Schweißtechnik Band 10, Stahlinstitute VDEh
,
2003
Google Scholar
 
7.
Thomy
,
C.
;
Grupp
,
M.
;
Seefeld
,
T.
;
Vollertsen
,
F.
:
CO2-Laser-Remote-Schweißen–Grundlagen, Prozessuntersuchungen und Anwendungen. In: wt Werkstattstechnik online
94
(
2004
)
7/8
, S.
373
–
378
Google Scholar
 
8.
Thomy
,
C.
;
Grupp
,
M.
;
Seefeld
,
T.
;
Sepold
,
G
;
Vollertsen
,
F.
: Prozessuntersuchungen zum CO2-Laser-Remoteschweißen. In:
Handbuch zum 1. VDI-Laserforum Laser Remote Schweißen.
Hamburg
,
23
–
24
Juni
2004
Google Scholar
 
9.
Kern
,
M.
:
Gas-und magnetofloiddynamische Maßnahmen zur beeinflussung der Nahtqualität beim Laserstrahlsschweißen
.
Teubner Stuttgart
1999
, S.
15
–
37
Google Scholar
 
This content is only available via PDF.
© 2005 Laser Institute of America.
2005
Laser Institute of America
You do not currently have access to this content.