US3787960A - Process for manufacturing curved channeled members - Google Patents

Process for manufacturing curved channeled members Download PDF

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Publication number
US3787960A
US3787960A US00193496A US3787960DA US3787960A US 3787960 A US3787960 A US 3787960A US 00193496 A US00193496 A US 00193496A US 3787960D A US3787960D A US 3787960DA US 3787960 A US3787960 A US 3787960A
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United States
Prior art keywords
cylindrical
workpiece
forming post
providing
post
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Expired - Lifetime
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US00193496A
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English (en)
Inventor
J Greenleaf
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Motors Liquidation Co
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Motors Liquidation Co
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Publication date
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    • 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
    • B21D53/00—Making other particular articles
    • B21D53/16—Making other particular articles rings, e.g. barrel hoops
    • B21D53/18—Making other particular articles rings, e.g. barrel hoops of hollow or C-shaped cross-section, e.g. for curtains, for eyelets

Definitions

  • ABSTRACT Metallic strip stock preferably of rectilinear shape is formed into a cylindrical workpiece by joining its free end portions.
  • the cylindrical workpiece is loaded into a die having a curl ring and a forming post and the die is actuated so that the sides of the cylindrical workpiece are progressively curled over the forming post preferably from the 'top edge as the die strokes to a stop point whereby the sides of the workpiece are curled into an annular and generally U-shaped configuration with the top and bottom edges of the workpiece coplanar or disposed in adjacent planes that intersect the axis of the cylindrical workpiece.
  • curved channeled shell members such as the thin walled and toroidal shells of torque converter rotors were made by stamping large washer-like blanks from flat sheets. These blanks were then pressed into an annular channeled member to form the inner or outer shell of a torque converter rotor.
  • annular discs were produced to form the center holes in the blanks. These discs and the other portions of the stock sheets outside of the outer circumference of the circular blanks resulted in a waste or scrap accumulation. While this prior process provided for the successful mass production of channeled annular shells the recovery, handling and recycling of the scrap added substantially to the shell cost.
  • This invention provides a more economical and advantageous process for making such annular toroidal or other curved channeled members.
  • rectilinear strip stock of a predetermined width and length with straight top and bottom edges is curved and securely joined at the free ends to make a cylindrical workpiece.
  • tooling devices such as a die
  • the cylindrical workpiece is preformed by curling or turning the top edge on a radius.
  • the sides of the cylinder are curled by a die set or other device to form an annular toroidal channeled member generally U-shaped in cross section. If needed, the channeled member manufactured can be restruck with a die set to finish form the part.
  • FIG. 1 is a perspective view of a portion of an annular channeled member formedby the process of this invention.
  • IG. 2 is a top view of a rectangular piece of metallic strip stock.
  • FIG. 3 is a perspective view showing the strip stock of FIG. 2' joined at its ends to form a cylindrical member.
  • FIG. 4 is a view partly in cross section showing the cylindrical member of FIG. 3 in a preform die set before closing.
  • FIG. 5 is a view partly in cross section showing the cylindrical member in the preform die set after closing.
  • FIG. 6 is a view partly'in cross section showing the cylindrical member in a curling die set before closing.
  • FIG. 7 is a view partly in cross section showing the curling die set of FIG. 6 in a closed position with the side walls of the cylinder curled into an annular channeled member.
  • FIG. 8 is a view partly in cross section of the workpiece in a finished form in a closed restrike die set.
  • FIG. 1 there is shown an annular channeled shell 10 for a hydrodynamic coupling or converter to which series of blades can be affixed to form a rotor.
  • This shell is made from strip stock such as the rectangular metallic strip 12 shown in FIG. 2 having square ends 13 and 14 and top and bottom edges 15 and 16.
  • the ends 13 v and 14 of the strip 12 are secured together preferably edges and subsequently curling the sides of the cylinder leading from one of the edges until. the edges are in planes adjacent to each other to form the channel member.
  • Another object and feature of this invention is to provide a new and improved process for making an annular channel member by using strip stock, joining the strip stock at its ends to make a cylindrical member, preforming the cylindrical member by turning an edge portion of one end thereof radially and subsequently simultaneously curling the side wall of the cylindrical member into an annulus having a generally U-shaped cross section.
  • Another object and feature of this invention is to provide a new and improved process of forming an annular thin walled channel member from a substantially flat by welding as at 17 to form a circular cylindrical workpiece 18 such as shown in FIG. 3.
  • the welded area 17 is preferably planished and smoothed to a degree whereby there is'no substantial irregularity in the annular cylinder as a result of the'welding.
  • the cylindrical workpiece 18 is then curled into shape without fractures, folds or galls by initially stretching and subsequently compressing the material of the cylinder as it is forced over a forming ring of a die set.
  • FIGS. 4 through 8 disclose the die sets and die operations preferably employed to make the channeled shell 10 from the cylinder 18.
  • a pre-form die set 22 employed in a suitable press to initially turn or flare'the top edge 15 of cylindrical work piece 18 outwardly.
  • This die set comprises a vertically movable upper punch shoe 24 which is operatively connected to an actuator such as the press ram 25 connected by a wrist pin to a motor driven eccentric not shown.
  • the punch shoe and the connected portions of the die described below are moved by the motor mechanism between a fully open position for workpiece loading and a fully closed position for-workpiece curling.
  • a cylindrical riser 28, fastened to the punch shoe 24 by screws 30, carries an annular curl ring 32.
  • This ring is secured to the riser 28 by screws 34 which extend through the punch shoe and riser as shown.
  • the curl ring has an annular concave surface 36 which curls or flares the upper edge of the annular cylinder 18 outwardly in a pre-form operation as will be further explained below.
  • a cylindrical form post 40 Aligned with this curl ring is a cylindrical form post 40 that has an annular and convex upper surface 42 which cooperates with the concave surface 36 of the curl ring to establish the curvature of the upper portion of cylindrical member 18.
  • a spring pad assembly 44 is employed.
  • This assembly has upper and lower sections 46 and 48 secured together by screws 50.
  • the upper section has a cylindrical guide surface 52 which slidably fits within the curl ring 32 to assist in the guidance of the curl ring during a pre-form operation.
  • the lower section of the spring pad assembly has a cylindrical surface 53 which contacts and supports a portion of the side wall of cylindrical workpiece 18.
  • the spring pad assembly 44 is yieldably connected to the punch shoe 24 by a plurality of helical springs 54 which are disposed and securely anchored in aligned spring pockets in the spring pad assembly and in the punch shoe.
  • a center post 58 which has an annular shoulder 60'that slidably fits in the curl ring 32 during pre-form operation and provides a support'for the cylindrical workpiece 18.
  • the center post 58 is fastened to a stationary pre-form die shoe 6] by screws 62.
  • the pre-form die shoe 61 is fastened to abolster plate 63 mounted on the bed 64 of the press.
  • the pre-form die shoe 61 and bolster plate 63 have a plurality of openings 68 formed on a circular path each of which receives one of the vertically movable pressure pins 70 extending upwardly from a conventional air cushion 72 of the press.
  • each of these pins projects upwardly from air cushion 72 into supporting engagement with the bottom of the form post 40 to yieldably support this die member in position.
  • the air cushion supports in conjunction with the forming post, the cylindrical workpiece on the downward stroke of the press as the cylindrical workpiece curls around the top of the forming post. On the upward stroke it returns the forming postand the curled workpiece to its unloading position.
  • a spacer block 80 is employed to properly space the curl ring 32 relative to the form post 40. This spacer block is secured by screws 82 to the outer periphery of the form post as shown in FIG. 4. When the lower edge of the curl ring contacts the topof the spacer block 80 a predetermined clearance 83 between the curl ring and the forin post is established.
  • the punch shoe and die shoe are guided in line by conventional guide pins 85.
  • the punch shoe with the attached curl ring 32 and spring pad assembly are moved by the motor operated press ram 25 to an upper position to provide sufiicient clearance to allow the cylindrical workpiece 18 to be placed on the center post and within the form post 40.
  • the punch shoe and the attached spring pad assembly and curl ring are then lowered to the open position shown in FIG. 4.
  • the ram 25 then lowers and applies a force to the punch shoe which is transferred to the curl ring 32, spacer block 80 and form post 40, overcoming the upward force of the air cushion 72.
  • FIG. 5 shows the outer rim of cylindrical workpiece 18 annularly flanged at 84 after the completion of the preform operation.
  • the'workpiece 18 is curled into an annular channeled member in a curl die set shown in FIG. 6.
  • This die set is similar to die set 22 and therefore only briefly described.
  • the press used with this die set has a punch shoe 92 moved vertically between loading, open, and curling positions by a press ram such as that previously disclosed.
  • a riser 94 is connected to the punch shoe 92 by screws 95 and a curl ring 96 is fastened to the connector member by screws 97.
  • the curl ring 96 has an annular concave surface 100 which is aligned with and which receives the convex surface 102 of the cylindrical form post 104.
  • the form post 104 is connected to a base 106 by screws 107 and this base is supported on the pressure pins 108.
  • the pins 108 extend through a stationary die shoe 110 that is secured to the press bolster plate not shown.
  • the stationary die shoe has a cylindrical center post 114 fixed thereto by screws 115.
  • the center post extends upwardlyfrom the die shoe 1 10 through an annular opening formed in the base 106. 'As shown the center post supports the cylindrical workpiece 18.
  • This die set also has a spring pad assembly 118 disposed above the center post which is connected by helical springs 120 to the punch shoe, so that the spring pad moves with the punch shoe.
  • a spacer block 122 fixed to the form post that limits the travel of the curl ring relative to the form post.
  • a workpiece stripper 124 is employed to remove the work from the form post after being formed or curled.
  • This stripper has a vertically movable outer housing 126 which is located adjacent to the form post and has a biasing spring 128 therein which urges the housing 126 upwardly.
  • the housing 126 has a flange 129 disposed in a vertical slot in retainer 130 to limit the stroke of thestripper housing 126.
  • the punch shoe and die shoe are guided in line by conventional guide pins and bushings as in the pre-form die.
  • the side wall of this workpiece is then progressively curled by the downwardly moving dies over on the form post to reversely curve the side wall with respect to a circular axis 133 having a radius R from the central axis of the workpiece.
  • the radius R is greater than the radius of the circular cylinder.
  • the edges 15 and 16 are coplanar or are disposed in closely adjacent planes which intersect the central axis of the workpiece.
  • the downward stroke of the punch shoe is stopped by stroke limiting mechanism within the press. As the punch shoe 92 is raised the stripper housing 126 is-biased upwardly by the spring 128 and engages the lower edge 16 of the workpiece and unloads it from the form post.
  • an optional restrike die set 138 can be employed.
  • This die set is similar to the pre-form and curl die sets previously described.
  • the press ram operated punch shoe 140 is vertically movable as described in connection with the pre-form and curl die and is secured to the punch steel 142.
  • This punch steel has an annular, concave forming surface that matches the convex and annular surface of the form post 144.
  • the form post is secured to annular base 146 that is mounted on the pressure pins 148 extending upwardly from the press air cushion not shown.
  • the restrike die 150 is secured to the press bolster plate not shown and supports the center post 152.
  • the center post supports the workpiece as in the previously described die sets.
  • the workpiece stripper mechanism 154 is the same construction and operation as described in connection with the curl die set. .as shown by FIG. 8, the closed position of the restrike die set, the punch steel and the cooperating form post has further curled the workpiece into a finished form as shown in FIG. 1. In this form the top edge 15 hasbeen curled'so that it is in'a plane below the plane of the bottom edge 16. I
  • a process of forming a toroidal member with spaced cylindrical side walls defining the inner and outer radial limits of said member and with a convexly curved end wall connecting the side walls comprising the steps of providing a substantially flat sheet of metal having side edges and having free end portions, welding the free end portions of said sheet of metal to form a cylindrical workpiece having contiguous ends and an intermediate cylindrical portion disposed around a central fixed line axis, positioning said cylindrical workpiece on a stationary base and adjacent to one side of a toroidal forming post having cylindrical inner and outer radial sides and a convexly curved top, said positioning forming an imaginary plane defined by the contact of one of said ends of the cylindrical workpiece and the stationary base, positioning an annular concave curling ring a predetermined distance from the top of said forming post thereby providing a space into which at least a portion of the, workpiece is to be fed, initially linearly moving the forming post and curling ring as a unit relative to the base from a starting position toward a terminal
  • a process of forming a toroidal thin walled channel member from a substantially flat sheet of metal having side edges and free end portions comprising the steps of welding the free end portions of said sheet to form a circular cylindrical workpiece having ends and an intermediate portion disposed around a fixed line axis, providing a toroidal forming post having radial inner and outer walls and a convexly curved top wall, providing a curling ring with an annular concave curling surface therein, providing a stationary base, loading said cylindrical workpiece in said cylindrical forming post, supporting said cylindrical workpiece on said base and in a plane defined by the contact of one end of the workpiece and the stationary base, spacing said curling ring a predetermined distance from said forming post to form a fixed curved passage therebetween thereby providing a space into which a portion of the workpiece is to be fed, initially moving said forming post and curling ring as a unit relative to said cylindrical workpiece from a first position toward a terminal position thereby to progressively feed the other end of said work
  • a process of making a toroidal channel member having spaced inner and outer cylindrical side walls as radial inner and outer limitsthereof and having a convexly curved end wall connecting said side walls comprising the steps of providing a flat sheet of metal with side edges with free end portions, hooping said sheet about an axis until said free end portions abut, welding said free end portions together to form a cylindrical blank of a predetermined radius having contiguous ends and an intermediatecylindrical portion supporting said cylindrical blank so that one of said ends thereof is disposed in -a plane, progressively curving said cylindrical blank starting with the other end thereof in a fixed path convexly curved with respect to a circular line having a radius greater than said radius of said cylindrical blank, subsequently progressively curving said intermediate portion of said cylindrical blank in said fixed convexly curved path and thereby moving said other end at least to a position aligned with said plane to thereby form said outer side wall and complete the formation of said toroidal channel member.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Bending Of Plates, Rods, And Pipes (AREA)
  • Press Drives And Press Lines (AREA)
  • Shaping Metal By Deep-Drawing, Or The Like (AREA)
US00193496A 1971-10-28 1971-10-28 Process for manufacturing curved channeled members Expired - Lifetime US3787960A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US19349671A 1971-10-28 1971-10-28

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US3787960A true US3787960A (en) 1974-01-29

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US (1) US3787960A (fr)
JP (1) JPS4851863A (fr)
AU (1) AU462741B2 (fr)
DE (1) DE2249797A1 (fr)
FR (1) FR2158264B1 (fr)
GB (1) GB1369312A (fr)

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3958314A (en) * 1973-05-25 1976-05-25 Henry Pratt Company Seal for butterfly valves
US5878494A (en) * 1993-09-15 1999-03-09 Firma Carl Freudenberg Method for manufacturing a machine bearing
EP1818581A1 (fr) * 2006-02-10 2007-08-15 Carl Freudenberg KG Méthode de fabrication pour un anneau d'étanchéité
US20100187767A1 (en) * 2007-08-01 2010-07-29 Carl Freudenberg Kg Method for the production of a sealing ring

Families Citing this family (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2510919A1 (fr) * 1981-08-05 1983-02-11 Hutchinson Perfectionnements aux procedes et dispositifs de fabrication des armatures annulaires pour joints d'etancheite et aux armatures et joints correspondants
JPS60227934A (ja) * 1984-04-27 1985-11-13 コピイ・コ−ポレ−シヨン 薄壁、半環状シエルの成形法
DE3418307A1 (de) * 1984-05-17 1985-11-21 Koppy Corp., Ferndale, Mich. Verfahren zum herstellen einer duennwandigen, ringkanalfoermigen schale und vorrichtung zum durchfuehren des verfahrens
DE4332306A1 (de) * 1993-09-23 1995-03-30 Rasselstein Ag Verfahren zur Herstellung eines leicht zu öffnenden Dosendeckels aus Blech
DE19531554A1 (de) * 1995-08-28 1997-03-06 Thyssen Industrie Verfahren zum Herstellen eines torusförmigen Druckbehälters, insbesondere für Airbags von Kraftfahrzeugen oder dergleichen
DE19625174B4 (de) * 1996-06-24 2008-05-15 IMPRESS Metal Packaging S.A., Crosmières Deckelringfertigung ohne Rondenverschnitt
DE102011001279A1 (de) 2011-03-15 2012-09-20 Elringklinger Ag Metallisches balgartiges Dichtungselement und Verfahren zum Herstellen des Dichtelementes
DE112011100966B4 (de) 2010-03-19 2023-02-02 Elringklinger Ag Verfahren und Vorrichtung zur Herstellung von Dichtelementen
DE102015121459A1 (de) 2015-12-09 2017-06-14 Elringklinger Ag Montagevorrichtung für einen profilierten Ring
DE102015121811A1 (de) 2015-12-15 2017-07-06 Elringklinger Ag Profilierter Ring und Herstellungsverfahren

Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US164892A (en) * 1875-06-22 Improvement in modes of making sheet-metal rings
US756832A (en) * 1903-06-27 1904-04-12 Francis D Cleveland Method of forming can-bodies.
US2159901A (en) * 1937-02-15 1939-05-23 Kelsey Hayes Wheel Co Metalworking machine
US2944502A (en) * 1953-10-10 1960-07-12 Lemmerz Werke G M B H Fa Apparatus for manufacturing wheel rims for road vehicles
US2976611A (en) * 1955-12-02 1961-03-28 Corning Glass Works Metal frame manufacture
US3129505A (en) * 1961-05-09 1964-04-21 Darwin S Cox Process of manufacturing one piece brake drum shells
US3423819A (en) * 1966-12-12 1969-01-28 Ford Motor Co Method of forming relatively straight lengths of metal into elongated members

Patent Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US164892A (en) * 1875-06-22 Improvement in modes of making sheet-metal rings
US756832A (en) * 1903-06-27 1904-04-12 Francis D Cleveland Method of forming can-bodies.
US2159901A (en) * 1937-02-15 1939-05-23 Kelsey Hayes Wheel Co Metalworking machine
US2944502A (en) * 1953-10-10 1960-07-12 Lemmerz Werke G M B H Fa Apparatus for manufacturing wheel rims for road vehicles
US2976611A (en) * 1955-12-02 1961-03-28 Corning Glass Works Metal frame manufacture
US3129505A (en) * 1961-05-09 1964-04-21 Darwin S Cox Process of manufacturing one piece brake drum shells
US3423819A (en) * 1966-12-12 1969-01-28 Ford Motor Co Method of forming relatively straight lengths of metal into elongated members

Cited By (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3958314A (en) * 1973-05-25 1976-05-25 Henry Pratt Company Seal for butterfly valves
US5878494A (en) * 1993-09-15 1999-03-09 Firma Carl Freudenberg Method for manufacturing a machine bearing
EP1818581A1 (fr) * 2006-02-10 2007-08-15 Carl Freudenberg KG Méthode de fabrication pour un anneau d'étanchéité
WO2007090559A1 (fr) * 2006-02-10 2007-08-16 Carl Freudenberg Kg Procédé pour réaliser une bague d'étanchéité
US20090212031A1 (en) * 2006-02-10 2009-08-27 Carl Freudenberg Kg Method for Producing a Sealing Ring
CN101379327B (zh) * 2006-02-10 2012-07-11 卡尔弗罗伊登柏格两合公司 用于制造密封圈的方法
US20100187767A1 (en) * 2007-08-01 2010-07-29 Carl Freudenberg Kg Method for the production of a sealing ring
US9816615B2 (en) 2007-08-01 2017-11-14 Carl Freudenberg Kg Method for the production of a sealing ring

Also Published As

Publication number Publication date
JPS4851863A (fr) 1973-07-20
AU462741B2 (en) 1975-07-03
DE2249797A1 (de) 1973-05-10
GB1369312A (en) 1974-10-02
FR2158264B1 (fr) 1975-03-28
AU4729372A (en) 1974-04-11
FR2158264A1 (fr) 1973-06-15

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