Leister Technologies Ag

Leister Process Technologies

Oliver Hinz

Michael Scheidt

Adolf Markus Niederberger

Ulrich Gubler

Erich Stauffer

Pius Barmet

Daniel Vogler

Adolf Niederberger

The invention relates to a laser head () for connecting tubular parts () by the laser transmission method and to a method of connecting the tubular parts () by means of the laser head (). The laser head () and the method that can be performed by the laser head () are suitable in particular for connecting a connecting element or branching element () to one end of a plastic pipe (). The laser head () makes simultaneous welding possible and has at least two shell parts () that can be radially separated from each other so that the laser head () can be placed around a connecting section () or a connecting region () of the tubular parts (). A number of laser sources () are arranged in the shell parts () in such a way that the laser beams () emerging from the laser sources () overlap at the connecting section () or at the connecting region () of the parts ().

Laser head and method of connecting tubular parts by the laser transmission method

The invention concerns a laser device for joining work pieces made of plastic by means of beam welding technology, with a processing head that has focusing devices for the laser beam. Here, the focusing device that is closest to the work pieces has a rotatably supported cylinder lens in the shape of a roller that focuses the laser beam along a single axis and presses the work pieces together in the form of a line in an area around the impact point of the laser beam. In order to enable the cylinder lens to always contact the surface of the work piece facing the processing head in a precisely tangential manner, the processing head has a pendulum-type suspension for the rotatable cylinder lens. This also makes it possible for the contact pressure exerted by the processing head to always act perpendicularly on the work pieces so that they are pressed together in all welding places in the same way in a defined manner during the welding process.

Laser device with pendulum-type pressure roller

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Kägiswil, Switzerland

Oliver Hinz