US3686920A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Apparatus for producing corrugated dihedral blanks
Assignee: Technigaz
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Filing: 1969-07-17
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Granted: 1972-08-29
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Expires: 1989-07-17
Abstract
Abstract Apparatus for producing a dihedral element with inwardly projecting corrugations. The uncorrugated dihedral or sheet metal blank is worked by punch and die members including a pair of lateral punches, having shaping edges in a common plane at an angle to each other and provided with adjacent sunk ends; a central punch between said ends; a die of complimentary configuration together with holding and retaining means; and means for relative synchronized and coordinate motions of the several tools.
Inventors
- 👤 Jean H Alleaume
- 👤 Gilbert C F Fournier
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 10:08
CPC Classifications
B; B21; B21D; B21D11/00; B21D11/08; B21D11/20; B21D11/206; B21D13/00; B21D13/02; B21D5/00; F; F17; F17C; F17C3/00; F17C3/02; F17C3/025; F17C3/027
Claims Analysis
Total Claims: 15
Claim 1
Independent Claim
203 words
In a manufacturing device for shaping a dihedral sheet metal blank and constituting a folding tool assembly comprising punches and dies and adaptable to a folding press-like shaping machine, the improvement consisting in that said device comprises on the one hand at least one pair of movable lateral dihedral punchmembers each having a substantially straight shaping edge, both punch members being arranged so that said shaping edges are located substantially in a common plane at an angle to each other and being provided with adjacent sunk ends, said lateral punchmembers constituting male forming tools, and at least one movable central dihedral punch-member intermediate said adjacent sunk ends, said central dihedral punch member having a substantially straight shaping edge in said common plane and on the other hand at least one movable die constituting a female forming tool having a variable configuration combined with and complementary to that of said punch-members in order to cooperate therewith, as well as blank holding and retaining means and means for interdependent automatic control providing relative synchronized and coordinate motions of said male and female forming tools in forced positive mutual guiding relationship so that said punchmembers move together in translation in parallel relation to said common plane.
Claim 2
Dependent Claim
203 words
In a manufacturing device for shaping a dihedral sheet metal blank and constituting a folding tool assembly comprising punches and dies and adaptable to a folding press-like shaping machine, the improvement consisting in that said device comprises on the one hand at least one pair of movable lateral dihedral punchmembers each having a substantially straight shaping edge, both punch members being arranged so that said shaping edges are located substantially in a common plane at an angle to each other and being provided with adjacent sunk ends, said lateral punchmembers constituting male forming tools, and at least one movable central dihedral punch-member intermediate said adjacent sunk ends, said central dihedral punch member having a substantially straight shaping edge in said common plane and on the other hand at least one movable die constituting a female forming tool having a variable configuration combined with and complementary to that of said punch-members in order to cooperate therewith, as well as blank holding and retaining means and means for interdependent automatic control providing relative synchronized and coordinate motions of said male and female forming tools in forced positive mutual guiding relationship so that said punchmembers move together in translation in parallel relation to said common plane.
Claim 3
Dependent Claim
74 words
A device according to claim 1, wherein said die is formed with a pair of concave dihedral recesses located in registering relationship with said lateral punch-members and each one comprising a blank supporting side and a punch-member guiding side, said sides extending at right angles to said common plane and wherein each lateral punch-member is rigid with a driven lateral punch-carrying block resting in movable contact upon the guiding side of the associated recess.
Claim 4
Dependent Claim
70 words
A device according to claim 2, wherein said central punch-member is rigid with a driving central punch-carrying block movable in parallel relation to said common plane by resting in movable contact simultaneously against said two lateral punch-carrying blocks, respectively, along a contact interface which is substantially planar, extending in a direction parallel to said common plane and inclined with respect to each aforesaid corresponding associated guiding side of said die.
Claim 5
Dependent Claim
45 words
A device according to claim 3, comprising guiding means, between said lateral punch-carrying blocks on the one hand and said die and said central punch-carrying block on the other hand, said guiding means being constituted reSpectively by at least one slideway of the slot-and-tongue type.
Claim 6
Dependent Claim
37 words
A device according to claim 1, wherein each die is composed of two elements forming half-dies substantially symmetrical with respect to said common plane, said half-dies being symmetrically movable in opposite directions with respect to one another.
Claim 7
Dependent Claim
66 words
A device according to claim 5, wherein each half-die is movable in circular translation and connected to a stationary base structure forming a clamping plate through the medium of a plane linkage control system consisting of a hinged parallelogram forming a parallel motion guiding mechanism, comprising two opposite rotatable sides which are constituted by at least two links pivoted respectively to said half-die and stationary structure.
Claim 8
Dependent Claim
77 words
A device according to claim 6, comprising a pair of stationary stops rigid with said stationary structure and adapted to set a maximum clearance position of said two half-dies and wherein each one of said links is pivoted through two pivot axes lying in a plane which is inclined in said maximum clearance position towards said plane of symmetry of said die in the direction of initiation of the motion of the two half-dies towards each other.
Claim 9
Dependent Claim
46 words
A device according to claim 2, wherein said blank holding and retaining means are constituted by at least two pairs of blank hold-down clamps arranged respectively on either side of each lateral punch-member and bearing against said lateral punch-carrying blocks through the medium of pushing elements.
Claim 10
Dependent Claim
59 words
A device according to claim 8, wherein each one of said blank hold-down clamps is engageable with an intercalated plate in movable contact with said hold-down clamp, and interposed between the latter and said die, both plates located on the same side of said lateral punch-members being rigid with one another and forming an element bent to a dihedron.
Claim 11
Dependent Claim
80 words
A device according to claim 9, wherein each aforesaid hold-down clamp is provided with a bearing plate, said bearing plates being rigid with one another by pairs so as to form respectively two bearing plates bent in the shape of a dihedron and connected respectively unilaterally to said central punch-carrying block, so as to be raised and suspended from the latter in said position of maximum clearance while at the same time allowing them to freely move towards the latter.
Claim 12
Dependent Claim
84 words
A device according to claim 9, wherein each bent bearing plate is made rigid by its projecting bend with a rod normal to its surface and located in the bisecting plane of said dihedron and mounted freely slidable in said central punch-carrying block, said rod comprising means for stopping its outward motion, constituted by a flange projecting radially, adapted to make contact with a similar stop means rigid with said central punch-carrying block, both rods being arranged on either side of said central punch-member.
Claim 13
Dependent Claim
20 words
A device according to claim 1, said punch-members being substantially symmetrical with respect to the bisecting plane of said dihedron.
Claim 14
Dependent Claim
25 words
A device according to claim 5, wherein automatic return means are provided to simultaneously move said half-dies back to their initial position of maximum clearance.
Claim 15
Dependent Claim
53 words
A device according to claim 9, wherein each intercalated plate is connected to the bearing plate of the associated blank hold-down clamps, so as to automatically move away from said die during the withdrawal of said hold-down clamps, while at the same time being freely movable in parallel relation to said bearing plate.
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1975-08-29 | 1976-02-28 | 1976-08-29 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-08-29 | 1980-02-28 | 1980-08-29 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-08-29 | 1984-02-28 | 1984-08-29 | $7700.00 | Window Closed / Lapsed |