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1. US5557835 - Method, Rivet-Punch, for joining several metal sheets by using non-heat-treated rivets made from an aluminium alloy

Office
United States of America
Application Number 08107705
Application Date 12.10.1993
Publication Number 5557835
Publication Date 24.09.1996
Grant Number 5557835
Grant Date 24.09.1996
Publication Kind A
IPC
B21J 15/02
BPERFORMING OPERATIONS; TRANSPORTING
21MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
JFORGING; HAMMERING; PRESSING METAL; RIVETING; FORGE FURNACES
15Riveting
02Riveting procedures
B21J 15/00
BPERFORMING OPERATIONS; TRANSPORTING
21MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
JFORGING; HAMMERING; PRESSING METAL; RIVETING; FORGE FURNACES
15Riveting
B21J 15/36
BPERFORMING OPERATIONS; TRANSPORTING
21MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
JFORGING; HAMMERING; PRESSING METAL; RIVETING; FORGE FURNACES
15Riveting
10Riveting machines
36Rivet sets, i.e. tools for forming heads; Mandrels for expanding parts of hollow rivets
CPC
B21J 15/36
BPERFORMING OPERATIONS; TRANSPORTING
21MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
JFORGING; HAMMERING; PRESSING METAL; RIVETING; FORGE FURNACES
15Riveting
10Riveting machines
36Rivet sets, i.e. tools for forming heads; Mandrels for expanding parts of hollow rivets
B21J 15/02
BPERFORMING OPERATIONS; TRANSPORTING
21MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
JFORGING; HAMMERING; PRESSING METAL; RIVETING; FORGE FURNACES
15Riveting
02Riveting procedures
Y10T 29/49943
YSECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
10TECHNICAL SUBJECTS COVERED BY FORMER USPC
TTECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
29Metal working
49Method of mechanical manufacture
49826Assembling or joining
49908Joining by deforming
49938Radially expanding part in cavity, aperture, or hollow body
49943Riveting
Y10T 29/53774
YSECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
10TECHNICAL SUBJECTS COVERED BY FORMER USPC
TTECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
29Metal working
53Means to assemble or disassemble
53709Overedge assembling means
5377Riveter
53774Single header
Applicants BRANDTS; MICHIEL P.
Inventors Brandts Michiel P.
Agents Young & Thompson
Priority Data 9100286 19.02.1991 NL
Title
(EN) Method, Rivet-Punch, for joining several metal sheets by using non-heat-treated rivets made from an aluminium alloy
Abstract
(EN)

The invention concerns a method for riveting a packet (50) of sheets (51,52) by means of unannealed aluminum rivets made from an alloy harder than that of the relatively soft AD rivets in common use; this method is characterized by the fact that the expansion of the head to be formed at the shank end (58,59) of the rivet during the riveting process is controlled by a snap-tool (62) which encloses the shank end (58,59) at first loosely. When the expansion of the head diameter approaches D=1,5 d (with d the rivet diameter), i.e., the limit above which cracks form in the head, the tool (62) prevents further deformation and forces the material of the head to deflect towards the central portion of the rivet shank (57) which subsequently expands and widens the hole (53) sufficiently to make the riveted joint last considerably longer. The good loosely and, later in the process, tightly fitted enclosing of the shank end (58,59) by the snap-tool (62) allows the riveting to be done manually. This can still be improved further by using a snap-tool (62) with a profile (67, 68, 69) complementary to the contour of the shank end (58, 59).