Positioning device for welding electrode

Details Positioning device for welding electrode Positioning device for welding electrode

2001-06-12

2003-05-06

Dunn, Tom (Department: 1725)

Electric heating

Metal heating

Of cylinders

C219S124220, C219S125110

Reexamination Certificate

active

06559405

ABSTRACT:

FIELD OF THE INVENTION
The invention concerns a device for positioning a welding electrode in an orbital tube-welding apparatus. Such apparatus are used to weld hollow objects to each other, such as a tube with a conical tube.
BACKGROUND OF THE INVENTION
FIG. 1
illustrates a tube
3
which is to be welded to a conical structure
6
, which is hollow, and will be termed conic
6
herein. The tube
3
fits into a recess
9
, and is held concentric to the conic
6
by an annular flange
12
.
FIG. 2
shows the tube
3
placed in position for welding. Dashed ellipse
15
represents a region which is shown in cross-sectional view in FIG.
3
. Tube
3
is shown, as are annular flange
12
and conic
6
.
The Inventor has identified a difficulty which occurs in welding the structures of
FIG. 2
together, and has advanced a solution.
SUMMARY OF THE INVENTION
In one form of the invention, a laser is affixed to a welding electrode, and projects a laser beam in a predetermined spatial relationship with the electrode. A human operator positions the laser beam on a target, which has a predetermined spatial relationship with a spot to be welded. The electrode thereby becomes positioned at a predetermined spatial position with respect to the spot.


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