Voestalpine Stahl Gmbh

Voestalpine Automotive Components Dettingen Gmbh & Co. Kg

Ronald Fluch

Jochen Lanksweirt

Jochen Kauffmann

Heinrich Bursy

Bernhard Strauss

Carina Kern

Martin Peruzzi

Peter Atzmüller

Gerhard Mayrhofer

Timothy Keppert

Roman Tiefenthaller

Franz Dorninger

Reinhold Stotz

Andreas Muhr

Roland Braidt

Bernhard Strauß

Siegfried Schreiner

A method and device for connecting sheet metal parts in order to form lamination stacks. In order to reproducibly manufacture geometrically accurate lamination stacks, it is proposed for the first and/or second coating to be provided with a separating layer, which contains a reaction accelerator for the adhesive of the first coating and contains a release agent in order to thus facilitate the division of the sheet metal parts into lamination stacks.

Method for connecting sheet metal parts in order to form lamination stacks

An electrical steel strip or sheet with at least one thermo-hardenable, water-based hot-melt adhesive varnish layer provided on one of its flat sides, a method for producing such an electric steel strip or sheet, and a lamination stack made therefrom are disclosed. In order to be able to have an increased melt viscosity during the baking process, it is proposed that the thermo-hardenable, water-based hot-melt adhesive varnish layer also have a pre-cross-linking agent that bonds with the epoxy resin or with a mixture of epoxy resins, the pre-cross-linking agent being an organic amine with three amino groups, namely an organic triamine or a mixture of such organic amines.

Electrical steel strip or sheet, method for producing such an electrical steel strip or sheet, and lamination stack made therefrom

A process for producing a coated electrical steel strip includes application of a pretreatment layer over a first flat side of a rolled electrical steel strip. The layer thickness of the pretreatment layer is in the range from 10 nm to 100 nm, in particular from 20 nm to 50 nm. The rolled electrical steel strip which has been coated with the pretreatment layer is then coated with an insulating lacquer layer over the pretreatment layer. The insulating lacquer layer is applied by roll application using a roll and no deliberate drying and/or crosslinking of the pretreatment layer is carried out after application of the pretreatment layer and before coating with the insulating lacquer layer.

Method for producing lacquer-coated electrical strips, and lacquer-coated electrical strip

A method for stacking sheet metal parts composed of an electrical steel strip or sheet in order to form lamination stacks, each with a stack height within a tolerance range from a predetermined desired stack height, including stacking the sheet metal parts, which have a hot-melt adhesive varnish layer on at least one flat side, preheating the hot-melt adhesive varnish layers and putting the hot-melt adhesive varnish layers under pressure, then determining the stack height of the individual lamination stacks and adjusting the stack height if necessary, and then finally heating the hot-melt adhesive varnish layers.

Method for stacking sheet metal parts made from an electrical steel strip or sheet to form lamination stacks

A coated sheet metal strip includes a rolled sheet metal strip having a first flat side and a second flat side. A first layer over the first flat side includes a carrier layer. The carrier layer contains a reaction accelerator for an adhesive and stores the reaction accelerator on a physical basis. A second layer, including the adhesive, is applied over the second flat side. The second layer is free of the reaction accelerator or any reaction accelerator.

Coated sheet metal band and production method

In a process for producing a lacquer-coated electric sheet strip a first insulation lacquer layer is applied wet across at least one side of an electric sheet strip. Across the wet first insulation lacquer layer a wet second insulation lacquer layer is applied. In a drying oven drying of the first insulation lacquer layer and the second insulation lacquer layer is performed.

Process for manufacturing lacquer-coated electric sheet strip, and lacquer-coated electric sheet strip

A coil and an electrical strip or electrical sheet with at least one heat-hardening hotmelt varnish, namely a baked enamel layer, provided on its flat sides, which has an epoxy resin base, at least one hardener, and at least one filler, are disclosed. In order to achieve a high storage stability and long-term temperature stability, the proposal is made for the filler of the baked enamel layer to have a metal carbonate, sulfate, sulfide, silicate, or phosphate or any mix of a plurality of these.

Coil and electrical strip or electrical sheet

A continuous strip method for producing an electric strip laminate which is wound into a coil is proposed in which at least two electric strips are pressed against each other on their flat sides and are integrally bonded to form an electric strip laminate and in a further step, this electric strip laminate is wound into a coil. More particularly, a first electric strip is coated on at least one of its flat sides with a first thermally activatable hot melt adhesive lacquer, the first hot melt adhesive lacquer on the first electric strip is thermally activated, and then the electric strips are pressed against each other on their flat sides with the activated first hot melt adhesive lacquer layer between these flat sides and a second electric strip is supplied to this pressing process at a temperature below the activation temperature of the first hot melt adhesive lacquer layer on the first electric strip.

Continuous strip method for producing an electric strip laminate which is wound as a coil

A method for producing an electric strip laminate wound into a coil is disclosed, in which at least two metallic electric strips that are electrically insulated from each other are integrally bonded to form an electric strip laminate and in another step, are wound into a coil. In order to ensure a reproducible method, the invention proposes that the electrical strips, which are each electrically insulated on at least one flat side with a baked enamel layer, be joined to each other by means of baked enamel layers facing each other and be integrally bonded to form an electric strip laminate by activating the chemical cross-linking of the two baked enamel layers.

Method for producing an electric strip laminate wound as a coil

A laminated core and a method for connecting sheet metal parts to form a laminated core, wherein sheet metal parts are separated from a sheet metal strip having, at least in some regions, a layer of curable polymer adhesive, and the sheet metal parts with adhesive-coated sides facing one another are provided above one another and are bonded under pressure to form a laminated core. In order to create advantageous method conditions, according to the invention a mixture comprising water and a thermoplastic and/or cross-linkable adhesion promoter is provided on at least one of the adhesive layers facing one another during bonding of the sheet metal parts.

Laminated core and method for connecting sheet metal parts to form a laminated core

The invention relates to a method for connecting sheet metal parts () to form a laminated core (), wherein sheet metal parts () are separated, in particular punched, from a sheet metal strip () that has, at least in some areas, a layer having curable polymer adhesive (), and the sheet metal parts () are preliminarily connected to form a laminated core (), the preliminary connection comprising plasticizing the adhesive () at least in some areas and joining the sheet metal parts () in order to connect the sheet metal parts by means of the plasticized adhesive () of at least one of the sheet metal parts (), and in a subsequent step the laminated core () having preliminarily connected sheet metal parts () is subjected to a curing of the adhesive (). In order to create an advantageous connection between the sheet metal parts, the plasticizing of the adhesive () comprises the introduction of a softener (), in particular HO.

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Linz, Austria

Ronald Fluch