Lpkf Laser & Electronics Ag

Evosys Laser Gmbh

Frank Brunnecker

Alexander Hofmann

Stefan Hierl

Andreas Kraus

Holger Aldebert

René Geiger

The invention relates to a method for welding a connection between a first joining surface of a first molded part and a second joining surface of a second molded part, which by means of a clamping device are moved and braced with their joining surfaces in contact with one another, wherein the first molded part is at least partially transparent for a primary beam of a first radiation source and at least partially absorbent for a secondary beam of a second radiation source, and the second molded part is at least partially absorbent for the primary beam, wherein sequentially the second molded part is irradiated with the primary beam and the first molded part is irradiated with the secondary beam.

Method for welding a connection between a first joining surface of a first molded part and a second joining surface of a second molded part

The invention relates to a method for laser beam plastic welding, having the following steps: arranging a first mold part which substantially absorbs laser radiation on a receiving area, irradiating the first mold part using an electromagnetic radiation source, detecting the heat of the first mold part by means of a detector, generating an absorption profile of the first mold part, arranging a second mold part which is substantially transparent to laser radiation on the first mold part, and irradiating the two mold parts along the contour of a welding seam to be produced using a machining laser such that the energy input produced by the machining laser is controlled by a controller on the basis of the generated absorption profile of the first mold part.

Method for laser beam plastic welding, and device

A process is described for form locking joining of two components through plastic deformation of one of the two components. In order for the tool for forming the form locking connection not to get in direct contact with the plasticized area of the joining partners, a third component between the tool and the two components to be joined through form locking is being used, which simultaneously enters into an adhesive bond with one of the two components to be joined through form locking. The thermal energy for creating the plastic state of one of the joining partners and for developing the adhesive bond is applied through electromagnetic radiation through the third component.

Process and device for form locked joining of two components

The invention relates to a clamping device for clamping at least two components () in a radiation-protected machine tool, particularly in a laser welding device (), comprising&#x2014;a receptacle () for supporting the first component (), &#x2014;a clamping head () for applying a force to the second component () in order to generate clamping pressure at the joint surface () between the two components (), &#x2014;an inner clamping jaw () located within the peripheral beam path () of the machine tool, the jaw having a clamping surface () for internally clamping the components (), and&#x2014;narrow connecting struts () for connecting the inner clamping jaw () to the external clamping head (), said connecting struts () bridging the passage gap () in the clamping head () allowing access for the beam path () of the machine tool to the components ().

Clamping apparatus for clamping at least two component parts

In a method and an apparatus for irradiation welding of two thermoplastic components, a local temperature maximum, which circulates together with the laser beam and increases from cycle to cycle, and a correspondingly circulating, locally increased clamping pressure are generated in the area of joining.

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Memmelsdorf, Germany

Frank Brunnecker