US 12,308,710 B2
Method and device for automatic formation of bundles of metal laminations
Cesare Librici, Savona (IT)
Appl. No. 17/262,544
Filed by DEMA S.R.L., Varazze (IT)
PCT Filed Jul. 24, 2019, PCT No. PCT/IB2019/056328
§ 371(c)(1), (2) Date Jan. 22, 2021,
PCT Pub. No. WO2020/021472, PCT Pub. Date Jan. 30, 2020.
Claims priority of application No. 102018000007490 (IT), filed on Jul. 25, 2018.
Prior Publication US 2021/0292108 A1, Sep. 23, 2021
Int. Cl. H02K 15/02 (2025.01); B21D 43/24 (2006.01); B65G 59/06 (2006.01); B65H 3/32 (2006.01); H02K 15/021 (2025.01)
CPC H02K 15/02 (2013.01) [B65G 59/062 (2013.01); B21D 43/24 (2013.01); B65H 3/322 (2013.01); H02K 15/021 (2025.01)] 20 Claims
OG exemplary drawing
 
1. A method for automatically forming bundles of metal laminations by automatic precision dosing of a lamination bundle includes picking up and separating a preset number of laminations, based on a preset height of the lamination bundle, from a lamination stack higher than said lamination bundle, the method comprising the following steps:
grabbing, at one end of the lamination stack, the preset number of laminations corresponding to a height of the lamination bundle;
separating said preset number of laminations of the lamination bundle from said lamination stack by axially moving the lamination bundle away from the lamination stack by a preset distance;
detaching one or more last laminations at an end of said lamination bundle facing the lamination stack, the one or more last laminations having remained adherent to a lamination of the lamination bundle intended to be last, said one or more last laminations being clamped by a part of a thickness of the one or more lamination or being attached to the one or more laminations to be last; and
collecting said one or more detached laminations in a position axially aligned with the laminations of said lamination stack,
wherein the step of detaching comprises two successive steps:
a first step of partially detaching by scraping in a direction of moving away the one or more laminations at the end of said lamination bundle facing the lamination stack, the scraping taking place along an axial direction of the lamination bundle and at a single region of a lamination perimeter, thereby forming a gap spacing the one or more laminations from the lamination intended to form the last lamination of the lamination bundle, the gap only partially extending along a perimetrical extent of the laminations; and
a second step of completely detaching said one or more laminations at the end of said lamination bundle facing the lamination stack, the second step taking place first by introducing a separator knife between the lamination bundle and said one or more potential laminations at the end of said lamination bundle facing the lamination stack in said gap, and then by moving said separator knife along a part of the lamination perimeter.