US 12,381,458 B2
Method for producing a lamination stack, lamination stack and electric machine
Tobias Lewe, Münster (DE); Karsten Machalitza, Mülheim an der Ruhr (DE); Christian Wiethoff, Marl (DE); Marco Tietz, Düsseldorf (DE); Volker Kamen, Herne (DE); Anne Hennig, Bönen (DE); and Dirk Schreier, Lauter-Bernsbach (DE)
Assigned to ThyssenKrupp Steel Europe AG, Duisburg (DE)
Appl. No. 17/910,744
Filed by ThyssenKrupp Steel Europe AG, Duisburg (DE)
PCT Filed Jan. 25, 2021, PCT No. PCT/EP2021/051570
§ 371(c)(1), (2) Date Sep. 9, 2022,
PCT Pub. No. WO2021/204433, PCT Pub. Date Oct. 14, 2021.
Claims priority of application No. 10 2020 109 985.1 (DE), filed on Apr. 9, 2020.
Prior Publication US 2023/0119661 A1, Apr. 20, 2023
Int. Cl. H02K 15/02 (2025.01); H01F 1/18 (2006.01); H01F 3/02 (2006.01); H01F 41/02 (2006.01); H02K 15/026 (2025.01)
CPC H02K 15/02 (2013.01) [H01F 1/18 (2013.01); H01F 3/02 (2013.01); H01F 41/0233 (2013.01); H02K 15/026 (2013.01); Y10T 29/49009 (2015.01)] 22 Claims
OG exemplary drawing
 
1. A method for producing a lamination stack for an electric machine, comprising the following steps:
A) providing a metal sheet provided with an at least partially curable polymer-based adhesive coating or a plurality of metal sheets provided with an at least partially curable polymer-based adhesive coating,
B) transporting the metal sheet into an inline system comprising: at least one cutting means, a separating means and an activating means for activating the adhesive coating,
C) cutting a molded part from the metal sheet provided in step A using the at least one cutting means,
D) activating the adhesive coating of the molded part using the activating means for activating the adhesive coating of the molded part,
E) separating the molded part from the metal sheet using the separating means,
F) placing the molded part in a positioning area for forming a molded part stack,
G) repeating steps C) to F) to continuously fill the positioning area with molded parts, wherein after a predefined number of molded parts has been reached, with regard to the next molded part, before carrying out step F) said next molded part is provided at least in areas with a treatment fluid using a treatment device to reduce the effect of the adhesive coating on this subsequent molded part such that the adhesive coating of this subsequent molded part, in the positioning area as a result of the reduced adhesive coating, causes improved separability of a stack section below the adhesive coating of reduced effect from a stack section above the adhesive coating of reduced effect.