# US 10,369,613 B2 · Die assembly for a stamping press > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 10,369,613 B2 - Document ID: US10369613B2 - Status: Granted - Kind: B2 - Application number: 15/425,370 - Filed: 2017-02-06 - Published: 2018-08-09 - Granted: 2019-08-06 - Earliest claimed: 2017-02-06 - Assignees: GM Global Technology Operations LLC - Applicants: GM Global Technology Operations LLC - Inventors: Siguang Xu; Charles Prabhakaran - Web page: https://patentgrep.com/patent/US10369613B2 ## CPC - B21D 37/10: Die sets; Pillar guides - B21D 5/02: on press brakes without making use of clamping means - B21D 13/02: by pressing - B21D 22/02: Stamping using rigid devices or tools - B30B 15/007: {Means for maintaining the press table, the press platen or the press ram against tilting or deflection} - B30B 15/062: {Press plates} - B30B 15/068: {Drive connections, e.g. pivotal} - B21D 5/0272: {Deflection compensating means} - B21D 37/01: Selection of materials - B21D: WORKING OR PROCESSING OF SHEET METAL OR METAL TUBES, RODS OR PROFILES WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL (working or processing of wire B21F) - B30B: PRESSES IN GENERAL (producing ultra-high pressure or ultra-high pressure and high temperature to effect modifications of a substance, e.g. for making artificial diamonds B01J3/00 ){(compressing means for refuse receptacles B65F1/1405)} ## Abstract A die assembly for use in a stamping press is provided. The die assembly includes a first die plate, a first curved die stiffener, and a first die shoe. The first die plate may be configured to form at least a portion of material into a desired configuration. The first curved die stiffener may be affixed to the first die plate on a first curved side of the first curved die stiffener. The first die shoe may be affixed to a second side of the first curved die stiffener. The first die shoe may be operatively configured to be mounted on a first press base. ## Claims ### Claim 1 A die assembly for use in a stamping press, the die assembly comprising: a first die plate configured to form at least a portion of material into a desired product; a first curved die stiffener affixed to the first die plate on a first curved side of the first curved die stiffener; a first die shoe affixed to a second side of the first curved die stiffener, the first die shoe operatively configured to be mounted on a first press base; a second die plate aligned opposite the first die plate, the second die plate configured to form at least a portion of material into a desired product together with the first die plate; a second curved die stiffener affixed to the second die plate on a first curved side of the second curved die stiffener; and a second die shoe affixed to a second side of the second curved die stiffener, the second die shoe operatively configured to be mounted on a second press base. ### Claim 2 (depends on 1) The die assembly as defined in claim 1 wherein the first curved side of the first curved die stiffener defines a convex surface in a lateral direction and a longitudinal direction of the first curved die stiffener. ### Claim 3 (depends on 1) The die assembly as defined in claim 1 wherein the first press base is configured to be used in a stamping press machine. ### Claim 4 (depends on 1) The die assembly as defined in claim 1 wherein the first die plate, the first curved die stiffener and the first die shoe are each formed from steel or cast iron or other metals. ### Claim 5 (depends on 1) The die assembly as defined in claim 1 wherein the first die plate, the first curved die stiffener and the first die shoe are affixed to one another with a plurality of mechanical fasteners. ### Claim 6 (depends on 1) The die assembly as defined in claim 1 wherein the first curved die stiffener is operatively configured to evenly distribute a stamping press load across an engagement surface of the first die plate when the stamping press is in operation. ### Claim 7 (depends on 6) The die assembly as defined in claim 6 wherein the first curved die stiffener and the first die plate are operatively configured to form substantially uniform channels across the portion of material. ### Claim 8 (depends on 1) The die assembly as defined in claim 1 wherein the second curved die stiffener and the second die plate are operatively configured to form substantially uniform channels across the portion of material. ### Claim 9 (depends on 1) The die assembly as defined in claim 1 wherein the first curved side of the second curved die stiffener defines a convex surface in a lateral direction and a longitudinal direction of the second curved die stiffener. ### Claim 10 (depends on 1) The die assembly as defined in claim 1 wherein the second side of the second curved die stiffener defines a convex surface in a lateral direction and a longitudinal direction of the second curved die stiffener. ### Claim 11 (depends on 1) The die assembly as defined in claim 1 wherein the first and the second press bases are configured to be used in a stamping press machine. ### Claim 12 (depends on 1) The die assembly as defined in claim 1 wherein the second die plate, the second curved die stiffener and the second die shoe are each formed from at least one of steel or cast iron. ### Claim 13 (depends on 1) The die assembly as defined in claim 1 wherein the second die plate, the second curved die stiffener and the second die shoe are affixed to one another via at least one mechanical fastener. ### Claim 14 (depends on 1) The die assembly as defined in claim 1 wherein the first curved die stiffener, the first die plate and the first die shoe are layered on each other such that the first curved die stiffener is disposed between the first die plate and the first die shoe. ### Claim 15 A die assembly for use in a stamping press, the die assembly comprising: a first die plate configured to form at least a portion of material into a desired product; a first curved die stiffener affixed to the first die plate on a first curved side of the first curved die stiffener; a first die shoe affixed to a second side of the first curved die stiffener, the first die shoe operatively configured to be mounted on a first press base; a second die plate aligned opposite the first die plate; and a second curved die stiffener affixed to the second die plate on a first curved side of the second curved die stiffener, and the second curved die stiffener is operatively configured to evenly distribute a stamping press load across an engagement surface of the second die plate when the stamping press is in operation. ### Claim 16 (depends on 15) The die assembly as defined in claim 15: wherein the second die plate is configured to form at least a portion of material into a desired product together with the first die plate; and further including a second die shoe affixed to a second side of the second curved die stiffener, the second die shoe operatively configured to be mounted on a second press base. ### Claim 17 (depends on 16) The die assembly as defined in claim 16 wherein the second curved die stiffener, the second die plate and the second die shoe are layered on each other such that the second curved die stiffener is disposed between the second die plate and the second die shoe. ### Claim 18 (depends on 15) The die assembly as defined in claim 15 wherein the first curved die stiffener, the first die plate and the first die shoe are layered on each other such that the first curved die stiffener is disposed between the first die plate and the first die shoe. ### Claim 19 (depends on 15) The die assembly as defined in claim 15 wherein the first curved die stiffener is disposed between the first die plate and the first die shoe. ### Claim 20 (depends on 15) The die assembly as defined in claim 15 wherein: the first curved side of the first curved die stiffener defines a convex surface in a lateral direction and a longitudinal direction of the first curved die stiffener; the first curved die stiffener is operatively configured to evenly distribute a stamping press load across an engagement surface of the first die plate when the stamping press is in operation; and the first curved side of the second curved die stiffener defines a convex surface in a lateral direction and a longitudinal direction of the second curved die stiffener.