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| United States Patent |
6,444,947
|
|
Bonss
, et al.
|
September 3, 2002
|
Method and device for laser beam welding
Abstract
The invention relates to a method and a device for laser-beam welding,
because the invention is especially suitable for deep welding a wide
variety of materials. The object of the invention is to weld a wide
variety of materials by means of laser radiation, especially by deep
welding, with a reduced amount of work and at the same time good quality
of the welded joint produced. The procedure adopted for this according to
the invention is that the intensity of the laser radiation is set by
beam-shaping in and on the surface of workpieces in such a way that a
small area in the workpiece is irradiated with a great intensity, to form
a steam capillary there, and a further, larger adjacent area on the
workpiece surface is irradiated with a lesser intensity, and as a result a
bell-shaped opening of the steam capillary is formed on the workpiece
surface and the cooling rate of the melted material is reduced.
| Inventors:
|
Bonss; Steffen (Zella-Mehlis, DE);
Standfuss; Jens (Pirna, DE);
Beyer; Eckhard (Weissig, DE)
|
| Assignee:
|
Fraunhofer-Gesellschaft zur Forderung der angewandten Forschung e.V. (DE)
|
| Appl. No.:
|
463737 |
| Filed:
|
February 16, 2000 |
| PCT Filed:
|
July 22, 1998
|
| PCT NO:
|
PCT/EP98/04586
|
| 371 Date:
|
February 16, 2000
|
| 102(e) Date:
|
February 16, 2000
|
| PCT PUB.NO.:
|
WO99/06173 |
| PCT PUB. Date:
|
February 11, 1999 |
Foreign Application Priority Data
| Aug 01, 1997[DE] | 197 33 371 |
| Nov 19, 1997[DE] | 197 51 195 |
| Current U.S. Class: |
219/121.63; 219/121.64; 219/121.69; 219/121.76; 219/121; 219/83 |
| Intern'l Class: |
B23K 026/00 |
| Field of Search: |
219/121.63,121.64,121.69,121.76,121.83
|
References Cited
U.S. Patent Documents
| 5821493 | Oct., 1998 | Beyer et al. | 219/127.
|
| 5859402 | Jan., 1999 | Maier | 219/121.
|
| 5869805 | Feb., 1999 | Beyer et al. | 219/121.
|
| Foreign Patent Documents |
| 60240395 | Nov., 1985 | JP | .
|
Primary Examiner: Elve; M. Alexandra
Attorney, Agent or Firm: Leydig, Voit & Mayer, Ltd.
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