Jugraj Singh

US Patent:

20100192659, Aug 5, 2010

Filed:

Feb 5, 2009

Appl. No.:

12/366310

Inventors:

Paul Edward Krajewski - Troy MI, US
Richard Harry Hammar - Shelby Township MI, US
Jugraj Singh - Lake Orion MI, US
Dennis Cedar - Rochester MI, US
Peter A. Friedman - Ann Arbor MI, US
Yingbing Luo - Ann Arbor MI, US

International Classification:

B21D 22/00
F27B 9/00

US Classification:

72349, 432121

Abstract:

An elevated temperature forming system in which a sheet metal workpiece is provided in a first stage position of a multi-stage pre-heater, is heated to a first stage temperature lower than a desired pre-heat temperature, is moved to a final stage position where it is heated to a desired final stage temperature, is transferred to a forming press, and is formed by the forming press. The preheater includes upper and lower platens that transfer heat into workpieces disposed between the platens. A shim spaces the upper platen from the lower platen by a distance greater than a thickness of the workpieces to be heated by the platens and less than a distance at which the upper platen would require an undesirably high input of energy to effectively heat the workpiece without being pressed into contact with the workpiece.

US Patent:

20180021832, Jan 25, 2018

Filed:

Jul 20, 2016

Appl. No.:

15/214510

Inventors:

Dajun Zhou - Troy MI, US
Changqing Du - Troy MI, US
Robert D Miller - Lake Orion MI, US
Jugraj Singh - Lake Orion MI, US

International Classification:

B21D 22/02

Abstract:

An outer bend radius is cold formed in an outer position within a final arc of the angled corner with an outer bend radius male die member. A central bend radius is cold formed in a central position spaced from the outer position and within the final arc of the angled corner with a central bend radius male die member. An inner bend radius is cold formed in an inner position that is spaced from the outer and central positions and the inner position is within a final arc of the angled corner with an inner bend radius male die member. The angled corner is transferred between each of the bend radii male die members using a continuous advanced high strength metal sheet in which the angled corner is formed.