US 11,811,278 B2
Method for producing an electromagnetic component for an electric machine
Tobias Lewe, Münster (DE); Karsten Machalitza, Mülheim an der Ruhr (DE); Volker Kamen, Herne (DE); and Marco Tietz, Düsseldorf (DE)
Assigned to ThyssenKrupp Steel Europe AG, Duisburg (DE)
Appl. No. 17/612,049
Filed by ThyssenKrupp Steel Europe AG, Duisburg (DE)
PCT Filed Jan. 17, 2020, PCT No. PCT/EP2020/051176
§ 371(c)(1), (2) Date Nov. 17, 2021,
PCT Pub. No. WO2020/233840, PCT Pub. Date Nov. 26, 2020.
Claims priority of application No. 10 2019 113 290.8 (DE), filed on May 20, 2019.
Prior Publication US 2022/0239203 A1, Jul. 28, 2022
Int. Cl. H01F 7/06 (2006.01); H02K 15/02 (2006.01); H01F 41/02 (2006.01); H02K 1/14 (2006.01)
CPC H02K 15/02 (2013.01) [H01F 41/0233 (2013.01); H02K 1/148 (2013.01)] 17 Claims
OG exemplary drawing
 
1. A method for producing an electromagnetic component including at least one of a laminated core, a stator core or a rotor core, for an electric machine, the method comprising:
providing a metal sheet as a starting material;
punching out a number of lamellae from the metal sheet;
heat-treating the number of lamellae to provide heat-treated lamellae; and
joining the heat-treated lamellae to form the electromagnetic component or a portion of the electromagnetic component,
wherein the joining of the heat-treated lamellae comprises, sequentially for each of the heat-treated lamellae, the following steps:
applying a thermally activated adhesive to a surface of the heat-treated lamella, substantially over the whole surface, to form an adhesive coating; and
activating the adhesive of the adhesive coating,
wherein the heat-treated lamellae having the activated adhesive are superimposed in a position-aligned and angularly aligned manner and are subjected, on their end face, to a compressive force acting in an axial direction,
wherein the activating the adhesive includes illuminating the adhesive coating with infrared radiation using an infrared radiation emitter,
wherein the infrared radiation emitter is, in terms of the processing sequence, arranged between a punching tool and an ejection punch, and includes:
at least one upper lamp which is directed in a punching direction onto a first lamella surface or
at least one lower lamp which is directed against the punching direction onto a second lamella surface present on the other side of the punching tool, or
both the at least one upper and the at least one lower lamp.