Search International and National Patent Collections
Some content of this application is unavailable at the moment.
If this situation persists, please contact us atFeedback&Contact
1. (WO1998051835) METHOD FOR SLIVER ELIMINATION IN SHEARING ALUMINUM SHEET
Latest bibliographic data on file with the International Bureau

Pub. No.: WO/1998/051835 International Application No.: PCT/US1998/007664
Publication Date: 19.11.1998 International Filing Date: 16.04.1998
Chapter 2 Demand Filed: 20.08.1998
IPC:
B23P 25/00 (2006.01) ,C22F 1/04 (2006.01) ,C22F 1/047 (2006.01) ,C22F 1/053 (2006.01) ,C22F 1/057 (2006.01)
B PERFORMING OPERATIONS; TRANSPORTING
23
MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
P
OTHER WORKING OF METAL; COMBINED OPERATIONS; UNIVERSAL MACHINE TOOLS
25
Auxiliary treatment of workpieces, before or during machining operations, to facilitate the action of the tool or the attainment of a desired final condition of the work, e.g. relief of internal stress
C CHEMISTRY; METALLURGY
22
METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
F
CHANGING THE PHYSICAL STRUCTURE OF NON-FERROUS METALS OR NON-FERROUS ALLOYS
1
Changing the physical structure of non-ferrous metals or alloys by heat treatment or by hot or cold working
04
of aluminium or alloys based thereon
C CHEMISTRY; METALLURGY
22
METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
F
CHANGING THE PHYSICAL STRUCTURE OF NON-FERROUS METALS OR NON-FERROUS ALLOYS
1
Changing the physical structure of non-ferrous metals or alloys by heat treatment or by hot or cold working
04
of aluminium or alloys based thereon
047
of alloys with magnesium as the next major constituent
C CHEMISTRY; METALLURGY
22
METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
F
CHANGING THE PHYSICAL STRUCTURE OF NON-FERROUS METALS OR NON-FERROUS ALLOYS
1
Changing the physical structure of non-ferrous metals or alloys by heat treatment or by hot or cold working
04
of aluminium or alloys based thereon
053
of alloys with zinc as the next major constituent
C CHEMISTRY; METALLURGY
22
METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
F
CHANGING THE PHYSICAL STRUCTURE OF NON-FERROUS METALS OR NON-FERROUS ALLOYS
1
Changing the physical structure of non-ferrous metals or alloys by heat treatment or by hot or cold working
04
of aluminium or alloys based thereon
057
of alloys with copper as the next major constituent
Applicants:
GENERAL MOTORS CORPORATION [US/US]; P.O. Box 33114 Detroit, MI 48232, US
Inventors:
KRAJEWSKI, Paul, E.; US
Agent:
GROVE, George, A.; General Motors Corporation Legal Staff P.O. Box 33114 Detroit, MI 48232, US
MANITZ, FINSTERWALD & PARTNER GBR; Postfach 22 16 11 D-80506 München, DE
Priority Data:
08/856,78415.05.1997US
Title (EN) METHOD FOR SLIVER ELIMINATION IN SHEARING ALUMINUM SHEET
(FR) PROCEDE DE CISAILLEMENT PERMETTANT D'ELIMINER L'ARGENT D'UNE FEUILLE D'ALUMINIUM
Abstract:
(EN) Age-hardened aluminum alloy sheet (18) can be subjected to a shearing operation, such as trimming or piercing, with reduced sliver formation by first heating the region to be sheared to a temperature above about 250 °C, immediately quenching the heated region to soften the region, and then performing the shearing operation in the softened region before age-hardening occurs.
(FR) On décrit une feuille en alliage d'aluminium durci par vieillissement (18) pouvant être soumise à une opération de cisaillement, telle que l'ébarbage ou le poinçonnage, avec une formation limitée d'argent. Pour ce faire, la partie à cisailler est d'abord chauffée à une température supérieure à 250 °C; la partie chauffée est ensuite immédiatement trempée pour l'amollir; l'opération de cisaillement est enfin réalisée sur la partie ramollie avant le procédé de vieillissement.
front page image
Designated States: CA, JP, MX
European Patent Office (AT, BE, CH, CY, DE, DK, ES, FI, FR, GB, GR, IE, IT, LU, MC, NL, PT, SE)
Publication Language: English (EN)
Filing Language: English (EN)
Also published as:
MXPA/a/1999/010478EP0981654JP2001507291 CA2286055