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US 2023/0415469 A1Published application
Method for connecting sheet metal parts in order to form lamination stacks
Assigneevoestalpine Stahl GmbH
InventorRonald Fluch
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Abstract
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.
Claims19
A method for connecting sheet metal parts in order to form lamination stacks, comprising:
- preparing an electrical steel strip or sheet, which has a first coating on a first flat side and a second coating on a second flat side opposite from the first flat side, wherein the first coating contains a thermally activatable adhesive and is free of reaction accelerators, and wherein the second coating contains a reaction accelerator for the adhesive of the first coating,
- separating sheet metal parts from the electrical steel strip or sheet,
- stacking the separated sheet metal parts onto one another in such a way that between each pair of successive sheet metal parts, the first coating faces the second coating,
- baking the stacked sheet metal parts onto one another through activation of the adhesive of the first coating and
- in another step, dividing the stacked sheet metal parts into lamination stacks,
- wherein the first and/or second coating is provided with a separating layer, which contains a reaction accelerator for the adhesive of the first coating and a release agent to facilitate the division of the sheet metal parts into lamination stacks.
3 more elements
Dependencies are inferred from the claim text.