Metal working – Method of mechanical manufacture – Assembling or joining
Patent
1995-06-06
1997-04-22
Vo, Peter
Metal working
Method of mechanical manufacture
Assembling or joining
2924354, B23P 1100, B23P 1904
Patent
active
056219636
ABSTRACT:
A method of upsetting a rivet, having a headed end and a nose end, in a countersunk hole in a workpiece using an electromagnetic riveting machine having two opposed drivers, one at each end of the rivet. The rivet is upset by impelling the drivers in the electromagnetic riveter against each end of the rivet to upset the tail of the rivet into a button, and expand the shank on the rivet within the hole in the workpiece. The force exerted by the driver at the headed end of the rivet is distributed in a broader, lower time/force curve than the force distribution exerted by the driver at the nose end of the rivet, so the force on the headed end driver is lower than the force on the tail end driver to prevent dimpling of the workpiece, and the greater force on the tail end driver imparts a certain momentum to begin upsetting the tail end of the rivet, while the force exerted by the headed end driver increases sufficiently to upset the rivet shank in the vicinity of the rivet head. The tail end capacitor is charged to a lower voltage than the charging voltage to the headed end capacitor, and commencement of the headed end driver stroke is delayed until the tail end driver has already been started. The headed end electromagnetic actuator is energized with a pulse of current from its capacitor having a more gradual rate of current increase than the rate of increase from the tail end capacitor to its electromagnetic actuator.
REFERENCES:
patent: 586197 (1897-07-01), Morgan, Sr.
patent: 773122 (1904-12-01), Christmas
patent: 852926 (1907-12-01), Carver et al.
patent: 1232050 (1917-07-01), Kraemer
patent: 1509133 (1924-09-01), Freeze
patent: 1583583 (1926-05-01), Dominguez
patent: 1646956 (1927-10-01), Erickson
patent: 1833268 (1931-11-01), Spry
patent: 2083168 (1937-06-01), Larson
patent: 2216403 (1940-10-01), Oeckl et al.
patent: 2276259 (1942-03-01), Temple, Jr.
patent: 2311797 (1943-05-01), Wright
patent: 2367797 (1945-01-01), Rappl
patent: 2405074 (1946-07-01), Underwood
patent: 2436251 (1948-02-01), Dobie et al.
patent: 2486595 (1949-02-01), Graves, Jr.
patent: 2536971 (1951-03-01), Weyandt et al.
patent: 2833091 (1958-05-01), Whitney
patent: 2853657 (1958-09-01), Hofacker
patent: 2854608 (1958-09-01), McGuire et al.
patent: 2946628 (1960-07-01), Bauregger
patent: 2970370 (1961-02-01), Weaver et al.
patent: 2976907 (1961-08-01), Harvey et al.
patent: 2979243 (1961-04-01), Moeckel
patent: 2995462 (1961-08-01), Mitchell et al.
patent: 3049713 (1962-08-01), Dupuy et al.
patent: 3132290 (1964-05-01), Kumpf
patent: 3135880 (1964-06-01), Olson et al.
patent: 3163989 (1965-01-01), Maxwell
patent: 3185909 (1965-05-01), Jahn
patent: 3190608 (1965-06-01), Hassa
patent: 3219853 (1965-11-01), Schreiber
patent: 3237881 (1966-03-01), Grosswiller, Jr.
patent: 3254706 (1966-06-01), Laing
patent: 3266582 (1966-08-01), Homanick
patent: 3283188 (1966-11-01), Edick
patent: 3298605 (1967-01-01), Bucke et al.
patent: 3305155 (1967-02-01), Willis
patent: 3317702 (1967-05-01), Mann
patent: 3332724 (1967-07-01), Doucet
patent: 3360972 (1968-01-01), Swhwinghamer et al.
patent: 3437965 (1969-04-01), Ragsdale
patent: 3453463 (1969-07-01), Wildi
patent: 3500079 (1970-03-01), Barthalon
patent: 3503022 (1970-03-01), Burdett
patent: 3538357 (1970-11-01), Barthalon
patent: 3559269 (1971-02-01), Schmitt et al.
patent: 3562893 (1971-02-01), Winslow et al.
patent: 3583822 (1971-06-01), Alexander et al.
patent: 3595132 (1971-07-01), Thacker
patent: 3620635 (1971-11-01), DelBianco
patent: 3640633 (1972-02-01), Gersch et al.
patent: 3646791 (1972-03-01), Leftheris
patent: 3662195 (1972-05-01), Wielt
patent: 3664173 (1972-05-01), Haucke et al.
patent: 3704506 (1972-12-01), Orr et al.
patent: 3737990 (1973-06-01), Schut
patent: 3747193 (1973-07-01), Gregory
patent: 3747194 (1973-07-01), Christensen
patent: 3751297 (1973-08-01), Minbiole, Jr. et al.
patent: 3802617 (1974-04-01), Berecz
patent: 3811313 (1974-05-01), Schut
patent: 3835339 (1974-09-01), Laronze
patent: 3850254 (1974-11-01), Hirdes
patent: 3878412 (1975-04-01), Kurpanek
patent: 3908257 (1975-09-01), Briles
patent: 3946926 (1976-03-01), Willis
patent: 4008518 (1977-02-01), Hauge et al.
patent: 4037982 (1977-07-01), Clement
patent: 4074425 (1978-02-01), Hasimoto et al.
patent: 4085337 (1978-04-01), Moeller
patent: 4122988 (1978-10-01), Casutt
patent: 4128000 (1978-12-01), Hogenhout
patent: 4132108 (1979-01-01), Hogenhout
patent: 4146858 (1979-03-01), McDermott
patent: 4148091 (1979-04-01), Hansen et al.
patent: 4151640 (1979-05-01), McDermott et al.
patent: 4151735 (1979-05-01), McDermott
patent: 4160326 (1979-07-01), Greisbach
patent: 4180195 (1979-12-01), Caley et al.
patent: 4182030 (1980-01-01), Mullins
patent: 4187780 (1980-02-01), Petruccelli
patent: 4192389 (1980-03-01), Raman
patent: 4209069 (1980-06-01), Smith
patent: 4260302 (1981-04-01), Benages
patent: 4273280 (1981-06-01), Birkofer
patent: 4309787 (1982-01-01), Lapohn
patent: 4310964 (1982-01-01), Murphy
patent: 4320761 (1982-03-01), Haddad
patent: 4349945 (1982-09-01), Fox
patent: 4369907 (1983-01-01), Muhr et al.
patent: 4378548 (1983-03-01), Rybak
patent: 4378621 (1983-04-01), Babel
patent: 4404742 (1983-09-01), Fuhrmeister
patent: 4417463 (1983-11-01), Nelson
patent: 4423620 (1984-01-01), Hogenhout et al.
patent: 4472216 (1984-09-01), Hogenhout et al.
patent: 4497197 (1985-02-01), Giardino et al.
patent: 4515302 (1985-05-01), Davern et al.
patent: 4555833 (1985-12-01), Hawkins et al.
patent: 4570952 (1986-02-01), Heimbigner
patent: 4577794 (1986-03-01), Armstrong et al.
patent: 4578001 (1986-03-01), Ochs et al.
patent: 4586362 (1986-05-01), Dean et al.
patent: 4609134 (1986-09-01), Davern
patent: 4645112 (1987-02-01), Davern et al.
patent: 4662556 (1987-05-01), Gidlund
patent: 4720215 (1988-01-01), Arena
patent: 4754643 (1988-07-01), Weeks, Jr. et al.
patent: 4833765 (1989-05-01), Bohland
patent: 4862043 (1989-08-01), Zieve
patent: 4885836 (1989-12-01), Bonomi et al.
patent: 4908928 (1990-03-01), Mazurik et al.
patent: 4941269 (1990-07-01), Mori et al.
patent: 4947719 (1990-08-01), Whistler
patent: 5003145 (1991-03-01), Nolle et al.
patent: 5014876 (1991-05-01), Young et al.
patent: 5016335 (1991-05-01), Becker et al.
patent: 5033917 (1991-07-01), McGlasson et al.
patent: 5040309 (1991-08-01), Hayden et al.
patent: 5060362 (1991-10-01), Birke et al.
patent: 5149933 (1992-09-01), Donner
patent: 5345161 (1994-09-01), Zieve
The Electromagetic Hammer, Technology Utilization Report, NASA, Dec. 1965.
Electromagnetic Metal Forming, Proc Instn Mech Engrs, K. Baines et al., 1965-66.
Neary J. Michael
Nelson Lawrence W.
The Boeing Company
Vo Peter
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