US3540260A - Split flanging die unit - Google Patents

Split flanging die unit Download PDF

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Publication number
US3540260A
US3540260A US793827*A US3540260DA US3540260A US 3540260 A US3540260 A US 3540260A US 3540260D A US3540260D A US 3540260DA US 3540260 A US3540260 A US 3540260A
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US
United States
Prior art keywords
die unit
die
flanging
band
split
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired - Lifetime
Application number
US793827*A
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English (en)
Inventor
Thomas A Mccoy
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
CARANDO MACHINE WORKS
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CARANDO MACHINE WORKS
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by CARANDO MACHINE WORKS filed Critical CARANDO MACHINE WORKS
Application granted granted Critical
Publication of US3540260A publication Critical patent/US3540260A/en
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Expired - Lifetime legal-status Critical Current

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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21D—WORKING OR PROCESSING OF SHEET METAL OR METAL TUBES, RODS OR PROFILES WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21D19/00—Flanging or other edge treatment, e.g. of tubes
    • B21D19/08—Flanging or other edge treatment, e.g. of tubes by single or successive action of pressing tools, e.g. vice jaws

Definitions

  • Each cylindrical body, for a drum or pail, is produced from an initially flat plate of sheet metal; the opposite ends of such plate being-in the body-forming operationbrought together and welded along a longitudinal or side seam.
  • the cylindrical body is sized on an expanding mandrel which causes said body to shorten somewhat except along the welded side seam which resists such shortening. Consequently, at and immediately adjacent each end of the side seam, the body has a slight projection extending beyond the normal plane of the related end of said body.
  • the cylindrical body is forcefully engaged at one end with a circular flanging die unit wherein said end of the body is turned outward as a continuous flange whichwhen formed-abuts against a stop shoulder included in said die unit.
  • a projection-as hereinbefore described-at the end to be flanged and in the Zone of the side seam such projection strikes the stop shoulder prematurely; i.e. before the full flange is dieforrned. This results in excessive pressure on the side seam and causes buckling of the body along such seam.
  • the present invention provides as a major object, an
  • each substantially 180 degree or half-circle segmental band provideson the related die halfa stop shoulder wherein any individual segment can yield radially outwardly when prematurely engaged by the aforementioned projection (existent on the end of the cylindrical body) upon forceful flanging engagement of the die unit with such body.
  • the present invention provides, as an additional object, novel means to anchor the ends of each substantially halfcircle segmental band in connection with the bed plate and to which the corresponding die half is rigidly secured.
  • the present invention provides, as a further object, a split flanging die unit which is designed for ready and convenient manufacture.
  • the present invention provides, as a still further object, a practical, reliable, and durable split flanging die unit and one which is exceedingly effective for the purpose for which it is desired.
  • the flanging die unit is circular and is fixed in a vertical axis position on a horizontal bed plate 2 supported for up-and-down movement by vertically reciprocable posts 3.
  • the bed plate 2 is disposed in a gap in a longitudinal table 4 on which each upstanding, cylindrical sheet metal body 5 is advanced, to, and moved away from, a position alined and for flanging engagement with the die unit 1.
  • the table 4 is carried on a main frame 6 which also serves as the support for the posts 3; the latter being suitably power-raised and lowered by means timed to the movement of each cylindrical body 5 to and from the aforesaid flanging position.
  • Each cylindrical body 5 is advanced to, and subsequently moved away from, said flanging position by one of a number of upstanding pusher fingers 7 carried on a driven endless chain 8 supported on the main frame 6; the upper run of chain 8 riding on a guide 9, while the lower run rides on a guide 10 in a hollow portion 11 of said frame.
  • each pusher finger 7 projects above said table.
  • a cylindrical sheet metal body 5 is herein shown only in part, as in FIGS. 3 and 5, it is to be understood that such bodies are individually and successively moved-by fingers 7-along the table 4, and to and from said fianging position, more or less in the fashion disclosed in US. Pat. No. 3,126,938.
  • the die unit supporting bed plate 2 is lowered by posts 3 prior to each cylindrical body 5 being advanced to fianging position, and at which time the top of the die unit is flush with the table 4.
  • the pusher fingers 7 are moving in a path below said cylindrical body and do not interfere with said fianging operation; the details of which hereinafter appear.
  • the die unit 1 and the bed plate 2 be formed to permit of the passage of the pusher fingers 7 therethrough from side to side of the die unit when the latter is in either its raised or lowered position.
  • the circular die unit 1 is diametrally split to form a vertical slot 12 extending from Side to side of said die unit and in longitudinal alinement with the path of travel of the pusher fingers 7 in the upper run of chain 8.
  • a vertical slot 12 extending from Side to side of said die unit and in longitudinal alinement with the path of travel of the pusher fingers 7 in the upper run of chain 8.
  • the die unit 1 is formed on opposite sides of slot 12 with open-ended chordal grooves 14, each of which receives a horizontal support bar 15 extending parallel to said slot 12 and of a length such that said bars project beyond opposite sides of the die unit.
  • each support bar 15 includes a depending finger 16 carried in a slotted guide block 17 mounted on the bed plate 2; each depending finger 16 having an elongated vertical opening 18 therethrough, and which opening receives a cross pin 19 fixed in the related guide block 17
  • Each opening 18 and cross pin 19 thus forms a lost-motion connection.
  • the support bars 15 Upon the bed plate 2, and die unit thereon, being thrust upwardly to conduct a fianging operation, the support bars 15 are moved to the bottom of the chordal grooves 14, and at which time the cross pins 19 are energized in the top of the openings 18. When the support bars 15 occupy a position in the bottom of the grooves 14, said bars are wholly below the horizontal plane in which the fianging operation occurs and hence in no way obstruct the same.
  • the die unit 1 being diametrally split, is comprised of two substantially 180 degree or half-circle die halves, each indicated at 20.
  • Each die half 20 in its substantial 180 degree or halfcircle peripheral configuration, includes a rounded upper corner 21 and, therebelow, an upwardly opening fianging trough 22; the outer wall of such flanging trough being a stop shoulder 23 provided by the upper portion of a segmental band 24 which engages entirely about the arcuate, substantially 180 degree periphery of the related die half.
  • the segments 25 of the band 24 are connected in closely adjacent, end-to-end relation by means of pivoted top and bottom spanner links 2511; each segment including a flat rigid tongue 26 which projects radially inwardly and 4 slidably engages in a circumferential groove 27 in the related die half 20.
  • the tongues 26 prevent the segmental band 24 from any vertical displacement, yet permitting of limited, radially outward yielding of any individual segment 25.
  • Each segmental band 24 has elongated top and bottom anchor links 28 pivotally connected to the endmost segments 25; such anchor links 28 thence extending outwardly, in diverging relation to each other in a direction away from the slot 12, and being pivotally connected to mounting blocks 29 fixed on the bed plate 2 outwardly of the die unit and closely adjacent the diametral slot 12. While the anchor links 28 assure that each segmental band 24 remains tightly engaged about the arcuate portion of each die half 20, any individual segment 25 can move, to a limited extent, radially outward; this due to the inherent loose play-however smallbetween the pivotally connected segments of said band.
  • the working parts are timed so that as each cylindrical body 5 is moved to flang ing position above the die unit 1 by one of the pusher fingers 7 advancing through diametral slot 12, such die unit is immediately raised to conduct the fianging operation, and at which time the cylindrical body clears said pusher finger and the latter continues to advance.
  • the present invention including the substantially half-circle segmental bands 24 end-anchored as describedobtains the benefits of the full-circle segmental band as embodied in the flanging die of the aforesaid copending application, Ser. No. 616,047.
  • the bed plate 2, and die unit thereon lowers whereupon the support bars 15 move to the position wherein their upper edges are flush with the top of the die unit and table 4; the support bars thus, in effect, engaging and lifting the flanged cylindrical body 5 out of the fianging trough 22 and clear of the die unit.
  • a flanging die unit adapted to engage in one end of a cylindrical sheet metal body to form an out-turned flange thereon, comprised of two substantially half-circle die halves which together define a diametral slot through the die unit from side to side thereof, and means supporting the die halves in fixed relation to each other; there being a substantially half-circle flanging trough on each such die half, such flanging trough including a radially inwardly facing stop shoulder, a substantially half-circle band engaging each such die half and forming said stop shoulder, means anchoring the ends of each band adjacent but clear of the diametral slot, and each such band formed to yield in a radially outward direction at individual points in the length thereof.
  • a flanging die unit as in claim 1, in which the supporting means for the die halves is a bed plate; said bed plate including a slot open from side to side thereof and matching said diametral slot.
  • a flanging die unit as in claim 1, in which the anchoring means includes links pivotally connected between the ends of each band and members fixed relative to the die unit; the links being disposed to maintain the band in engagement with the related die half.
  • a flanging die unit as in claim 3, in which the links corresponding to each band extend outwardly in diverging relation in a direction away from the diametral slot defined by the die halves.
  • a flanging die unit as in claim 1, in which the supporting means for the die halves is a bed plate slotted to correspond with the diametral slot defined by the die halves; and the anchoring means for each band including mounting blocks fixed on the bed plate outwardly of the die unit but adjacent the ends of the band, and links pivotally connected between the ends of the band and the corresponding mounting blocks; the links corresponding to each band extending outwardly in diverging relation in a direction away from the diametral slot.
  • each band comprises a plurality of pivotally connected segments; any such segment being individually yieldable, to a limited extent, in a radially outward direction.
  • a flanging die unit as in claim 1, including a chordal groove in each die half, a cylindrical body support bar relatively vertically movable in each chordal groove, the support bars extending to mounts beyond the periphery of the die unit, the latter being vertically movable between a lowered and a raised position, the support bars being flush with the top of the die unit when the latter is in lowered position and below the flanging trough when said die unit is in raised position; the bands having notches therein which accommodate the support bars when the same are below said flanging trough.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Bending Of Plates, Rods, And Pipes (AREA)
  • Insulating Bodies (AREA)
US793827*A 1969-01-24 1969-01-24 Split flanging die unit Expired - Lifetime US3540260A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US79382769A 1969-01-24 1969-01-24

Publications (1)

Publication Number Publication Date
US3540260A true US3540260A (en) 1970-11-17

Family

ID=25160915

Family Applications (1)

Application Number Title Priority Date Filing Date
US793827*A Expired - Lifetime US3540260A (en) 1969-01-24 1969-01-24 Split flanging die unit

Country Status (4)

Country Link
US (1) US3540260A (fr)
FR (1) FR2029007A1 (fr)
GB (1) GB1204638A (fr)
NL (1) NL6907670A (fr)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3845656A (en) * 1974-01-02 1974-11-05 Carando Machine Works Die-stabilizing mechanism for a split flanging die unit

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3344647A (en) * 1965-04-07 1967-10-03 Nat Electric Welding Machines Mechanical device
US3455140A (en) * 1967-10-25 1969-07-15 Anchor Coupling Co Inc Tool with wedge-operated jaw segments
US3460500A (en) * 1967-02-14 1969-08-12 Carando Machine Works Flanging die
US3468153A (en) * 1967-11-20 1969-09-23 Nat Can Corp Die set unit and method for can manufacture

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3344647A (en) * 1965-04-07 1967-10-03 Nat Electric Welding Machines Mechanical device
US3460500A (en) * 1967-02-14 1969-08-12 Carando Machine Works Flanging die
US3455140A (en) * 1967-10-25 1969-07-15 Anchor Coupling Co Inc Tool with wedge-operated jaw segments
US3468153A (en) * 1967-11-20 1969-09-23 Nat Can Corp Die set unit and method for can manufacture

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3845656A (en) * 1974-01-02 1974-11-05 Carando Machine Works Die-stabilizing mechanism for a split flanging die unit

Also Published As

Publication number Publication date
FR2029007A1 (fr) 1970-10-16
DE1925242A1 (de) 1970-07-30
NL6907670A (fr) 1970-07-28
GB1204638A (en) 1970-09-09

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