Patent US1059221A successfully refreshed from Google Patents.
Patent US5575166A successfully refreshed from Google Patents.
US5575166A
Expired / Lapsed
US
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High energy impact riveting apparatus and method
Assignee: Gemcor Engr Corp
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Filing: 1995-06-07
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Granted: 1996-11-19
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Expires: 2015-06-07
Abstract
Abstract A method and apparatus for forming a metal object wherein first and second coils are provided in close proximity to and in electromagnetic association with each other, the first coil is in driving association with a forming tool for forming the metal object and the first and second coils are supported in a manner allowing movement of the first coil relative to the second coil, and wherein an electric current pulse is supplied simultaneously to the first and second coils to produce a repulsive electromagnetic force sufficient to accelerate the first coil and drive the forming tool to perform a forming operation on the metal object, the pulses being shaped in accordance with a characteristic of the object being formed. The pulse shaping aspect includes matching the magnetic force based on the current pulse with the stress-strain characteristic of the object being formed. A voltage doubling network can be employed to provide increased output force. In high energy impact fastener installation apparatus, there is balancing of the applied force from both ends of the fastener during simultaneous impact and upset to eliminate transfer of force to the workpiece and supporting structure.
Inventors
- 👤 David Michalewski
- 👤 Joseph A. Dionne
- 👤 Mark A. Siuta
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 23:11
CPC Classifications
B; B21; B21J; B21J15/00; B21J15/10; B21J15/16; B21J15/24; Y; Y10; Y10T; Y10T29/00; Y10T29/53; Y10T29/53709; Y10T29/5377; Y10T29/53774
Claims Analysis
Total Claims: 14
Claim 1
Independent Claim
144 words
A method for forming a metal object such as upsetting a fastener comprising the steps of: a) providing a forming tool adapted for forming said metal object; b) providing first and second coil means in close proximity to and in electromagnetic association with each other, said first coil means being in driving association with said forming tool; c) supporting said first and second coil means in a manner allowing movement of said first coil means relative to said second coil means; and d) supplying electric current pulses simultaneously to said first and second coil means to produce a repulsive electromagnetic force sufficient to accelerate said first coil means and drive said forming tool to perform a forming operation on said metal object; e) said step of supplying electric current pulses including shaping said pulses in accordance with a characteristic of the object being formed.
Claim 2
Independent Claim
144 words
A method for forming a metal object such as upsetting a fastener comprising the steps of: a) providing a forming tool adapted for forming said metal object; b) providing first and second coil means in close proximity to and in electromagnetic association with each other, said first coil means being in driving association with said forming tool; c) supporting said first and second coil means in a manner allowing movement of said first coil means relative to said second coil means; and d) supplying electric current pulses simultaneously to said first and second coil means to produce a repulsive electromagnetic force sufficient to accelerate said first coil means and drive said forming tool to perform a forming operation on said metal object; e) said step of supplying electric current pulses including shaping said pulses in accordance with a characteristic of the object being formed.
Claim 3
Dependent Claim
31 words
The method of claim 1, wherein said step of shaping said pulses includes matching the magnetic force based on the current pulse with the stress-strain characteristics of the object being formed.
Claim 4
Dependent Claim
34 words
The method of claim 1, wherein said electric current pulses are supplied utilizing an LC network and wherein said step of shaping said pulses includes varying at least one parameter of said LC network.
Claim 5
Dependent Claim
136 words
Apparatus for forming a metal object such as upsetting a fastener comprising: a) a forming tool; b) a first coil means drivingly associated with said forming tool; c) a second coil means in close proximity to and in electromagnetic association with said first coil means; d) means for supporting said first and second coil means in a manner allowing movement of said first coil means relative to said second coil means; and e) a circuit for supplying electric current pulses simultaneously to said first and second coil means to produce a repulsive electromagnetic force sufficient to accelerate said first coil means and drive said forming tool to perform a forming operation on said metal object, said circuit including pulse shaping means for shaping said current pulses in accordance with a characteristic of the object being formed.
Claim 6
Dependent Claim
136 words
Apparatus for forming a metal object such as upsetting a fastener comprising: a) a forming tool; b) a first coil means drivingly associated with said forming tool; c) a second coil means in close proximity to and in electromagnetic association with said first coil means; d) means for supporting said first and second coil means in a manner allowing movement of said first coil means relative to said second coil means; and e) a circuit for supplying electric current pulses simultaneously to said first and second coil means to produce a repulsive electromagnetic force sufficient to accelerate said first coil means and drive said forming tool to perform a forming operation on said metal object, said circuit including pulse shaping means for shaping said current pulses in accordance with a characteristic of the object being formed.
Claim 7
Dependent Claim
47 words
Apparatus according to claim 4, wherein said forming tool comprises a bucking tool for upsetting a fastener such as a rivet or slug and wherein said pulse shaping means matches the magnetic force based on the current pulse with the stress-strain characteristics of the fastener being upset.
Claim 8
Dependent Claim
15 words
Apparatus according to claim 4, wherein said pulse shaping means comprises an LC type network.
Claim 9
Dependent Claim
170 words
Apparatus for forming a metal object such as upsetting a fastener comprising: (a) a forming tool; (b) a first coil means drivingly associated with said forming tool; (c) a second coil means in close proximity to and in electromagnetic association with said first coil means; (d) means for supporting said first and second coil means in a manner allowing movement of said first coil means relative to said second coil means; and (e) means for supplying electric current pulses simultaneously to said first and second coil means to produce a repulsive electromagnetic force sufficient to accelerate said first coil means and drive said forming tool to perform a forming operation on said metal object, said pulse supplying means comprising energy storage means and discharge circuit means for discharging said energy storage means in a controlled manner for supplying said current pulses to said coils, said discharge circuit means further including protective diode means for directing the flow of reverse current and protecting components of said discharge circuit means associated therewith.
Claim 10
Dependent Claim
170 words
Apparatus for forming a metal object such as upsetting a fastener comprising: (a) a forming tool; (b) a first coil means drivingly associated with said forming tool; (c) a second coil means in close proximity to and in electromagnetic association with said first coil means; (d) means for supporting said first and second coil means in a manner allowing movement of said first coil means relative to said second coil means; and (e) means for supplying electric current pulses simultaneously to said first and second coil means to produce a repulsive electromagnetic force sufficient to accelerate said first coil means and drive said forming tool to perform a forming operation on said metal object, said pulse supplying means comprising energy storage means and discharge circuit means for discharging said energy storage means in a controlled manner for supplying said current pulses to said coils, said discharge circuit means further including protective diode means for directing the flow of reverse current and protecting components of said discharge circuit means associated therewith.
Claim 11
Dependent Claim
18 words
Apparatus according to claim 7, further including protective dump circuit means operatively connected to said energy storage means.
Claim 12
Dependent Claim
174 words
Apparatus for forming a metal object such as upsetting a fastener comprising: (a) a forming tool; (b) a first coil means drivingly associated with said forming tool; (c) a second coil means in close proximity to and in electromagnetic association with said first coil means; (d) means for supporting said first and second coil means in a manner allowing movement of said first coil means relative to said second coil means; and (e) means for supplying electric current pulses simultaneously to said first and second coil means to produce a repulsive electromagnetic force sufficient to accelerate said first coil means and drive said forming tool to perform a forming operation on said metal object, said pulse supplying means comprising energy storage means and discharge circuit means for discharging said energy storage means in a controlled manner for supplying said current pulses to said coils, said pulse supplying means including voltage doubler means so that said first coil means and said forming tool apply increased force to said metal object during forming of the same.
Claim 13
Dependent Claim
174 words
Apparatus for forming a metal object such as upsetting a fastener comprising: (a) a forming tool; (b) a first coil means drivingly associated with said forming tool; (c) a second coil means in close proximity to and in electromagnetic association with said first coil means; (d) means for supporting said first and second coil means in a manner allowing movement of said first coil means relative to said second coil means; and (e) means for supplying electric current pulses simultaneously to said first and second coil means to produce a repulsive electromagnetic force sufficient to accelerate said first coil means and drive said forming tool to perform a forming operation on said metal object, said pulse supplying means comprising energy storage means and discharge circuit means for discharging said energy storage means in a controlled manner for supplying said current pulses to said coils, said pulse supplying means including voltage doubler means so that said first coil means and said forming tool apply increased force to said metal object during forming of the same.
Claim 14
Dependent Claim
25 words
Apparatus according to claim 9, wherein said voltage doubler means comprises another energy storage means and discharge circuit means together with full wave rectifier means.
References Cited (Backward Citations)
US1365664A
Cited
US2083168A
Cited
US2441517A
Cited
DE1503181A1
Cited
US3375694A
Cited
US3453463A
Cited
US3584496A
Cited
US3811313A
Cited
SU432953A1
Cited
US3783662A
Cited
SU544495A1
Cited
SU542580A1
Cited
SU1333465A1
Cited
SU1357110A2
Cited
US4862043A
Cited
US4990805A
Cited
JPS6453707A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1999-11-19 | 2000-05-20 | 2000-11-19 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 2003-11-19 | 2004-05-20 | 2004-11-19 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2007-11-19 | 2008-05-20 | 2008-11-19 | $7700.00 | Window Closed / Lapsed |