Method for prevention of premature edge fracture at draw bead
AssigneeCleveland-Cliffs Steel Properties Inc.
InventorsFeng Zhu, Sobhan Nazari Tiji, Panagiotis Makrygiannis, Jimmy J. Zhang, Yu-Wei Wang
Life of this patent
Estimating the term…
Abstract
A system for forming a steel material includes a first binder, a second binder, a punch and a carrier blank. The first binder and the second binder are configured to form a draw bead shape in the steel material by compressing the steel material between a draw bead protrusion and a draw bead channel. The punch is configured to form the steel material relative to the first binder and the second binder. The carrier blank is positioned on a surface of the steel material and is configured to cover a portion of the draw bead shape during formation of the draw bead shape in the steel material.
Claims19
A system for forming a steel material, the system comprising:
- (a) a first binder;
- (b) a second binder, the first binder and the second binder being configured to form a draw bead in the steel material by compressing the steel material between a draw bead protrusion and a draw bead channel;
- (c) a punch, the punch being configured to form the steel material relative to the first binder and the second binder;
- and
- (d) a carrier blank configured to be positioned on a surface of the steel material, the carrier blank being configured to cover a portion of the draw bead during formation of the draw bead in the steel material, at least one dimension of the carrier blank being sized to cover an entire lateral extent of the draw bead protrusion and the draw bead channel.
A system for forming a steel sheet, the system including:
- (a) a first binder;
- (b) a second binder, the first binder and the second binder being configured to form a draw bead shape in the steel sheet by compressing the steel sheet between a draw bead protrusion and a draw bead channel;
- (c) a punch, the punch being configured to form the steel sheet relative to the first binder and the second binder;
- and
- (d) a carrier blank configured to be positioned on a face of the steel sheet, the carrier blank being configured to redistribute deformation of the steel sheet from one region of the steel sheet to another during forming of the draw bead shape using the first binder and the second binder by covering an entire lateral extent of the first binder or the second binder.
A method for forming a steel sheet, the method comprising:
- (a) placing the steel sheet on a first binder or a second binder;
- (b) placing a carrier blank on an upwardly oriented surface of the steel sheet with the carrier blank overlapping an entire lateral extent of the first binder or the second binder;
- (c) compressing the steel sheet and the carrier blank between the first binder and the second binder to form a draw bead geometry in both the steel sheet and the carrier blank;
- and
- (d) forming a portion of the steel sheet into a predetermined shape by moving a punch relative to the first binder, the second binder or both the first binder and the second binder,
- wherein the step of compressing the steel sheet and the carrier blank includes deforming the steel sheet and the carrier blank to form the draw bead geometry using a draw bead channel and a draw bead protrusion.
Dependencies are inferred from the claim text.