US 12,214,400 B2
Method of forming a splined component
Harold Vahle, Concord (CA); and Saso Cekalov, Concord (CA)
Assigned to Magna Powertrain Inc., Concord, CA (US)
Appl. No. 17/789,814
Filed by Magna Powertrain Inc., Concord (CA)
PCT Filed Feb. 17, 2021, PCT No. PCT/CA2021/050170
§ 371(c)(1), (2) Date Jun. 29, 2022,
PCT Pub. No. WO2021/163792, PCT Pub. Date Aug. 26, 2021.
Claims priority of provisional application 62/978,096, filed on Feb. 18, 2020.
Prior Publication US 2023/0039866 A1, Feb. 9, 2023
Int. Cl. B21D 22/28 (2006.01); B21D 53/28 (2006.01); B21D 53/84 (2006.01); B21K 1/30 (2006.01); B23P 15/14 (2006.01); F16D 13/68 (2006.01); B21D 22/30 (2006.01)
CPC B21D 22/28 (2013.01) [B21D 53/28 (2013.01); B21D 53/84 (2013.01); B21K 1/30 (2013.01); B23P 15/14 (2013.01); F16D 13/683 (2013.01); B21D 22/30 (2013.01)] 11 Claims
OG exemplary drawing
 
1. A method of manufacturing a torque-transmitting component, the method comprising the steps of:
providing a flat annular blank having a flat profile to a transfer press having a first station, second station, third station, and fourth station, the first, second, third, and fourth stations including a first, second, third, and fourth die and a first, second, third, and fourth punch, respectively;
at the first station of the transfer press, drawing the blank between the first die and the first punch and forming an unfinished component having a radial flange segment and an axial hub segment, the unfinished component being in the form of a first cup-shaped preform;
transferring the first preform to the second station and pressing the first preform between the second die and the second punch and defining a second preform of the unfinished component having a chamfer portion disposed between the flange segment and the hub segment;
transferring the second preform to the third station and pressing the second preform between the third die and the third punch and defining a rough splined preform of the unfinished component having a plurality of rough splines extending radially outward from the hub segment; and
transferring the rough splined preform to the fourth station and pressing the rough splined preform between the fourth die and the fourth punch and defining a smooth splined component having a final radial flange segment and a final axial hub segment;
wherein the smooth splined component includes, along the final axial hub segment, a constant inner diameter, a smooth minor outer diameter, and a smooth major outer diameter.