US2955556A - Hydraulic expander - Google Patents

Hydraulic expander Download PDF

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Publication number
US2955556A
US2955556A US662860A US66286057A US2955556A US 2955556 A US2955556 A US 2955556A US 662860 A US662860 A US 662860A US 66286057 A US66286057 A US 66286057A US 2955556 A US2955556 A US 2955556A
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United States
Prior art keywords
die
sections
cylinder
cam
metal
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
US662860A
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English (en)
Inventor
Ralph E Roper
Eugene K Fike
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.)
Wallace Expanding Machines Inc
Original Assignee
Wallace Expanding Machines Inc
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 Wallace Expanding Machines Inc filed Critical Wallace Expanding Machines Inc
Priority to US662860A priority Critical patent/US2955556A/en
Application granted granted Critical
Publication of US2955556A publication Critical patent/US2955556A/en
Priority to BE604916A priority patent/BE604916Q/fr
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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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
    • B21D39/00—Application of procedures in order to connect objects or parts, e.g. coating with sheet metal otherwise than by plating; Tube expanders
    • B21D39/08—Tube expanders
    • B21D39/20—Tube expanders with mandrels, e.g. expandable

Definitions

  • This invention relates generally to metal working tools and more particularly it relates to a mechanism especially adapted for forming cylindrical or rectangular metallic shapes from welded metallic cylinders of sheet metal.
  • the principal object of this invention is to provide a metal working machine adapted to expand a welded cylinder of sheet metal into a permanently set, true, rectangular or cylindrical shape having complex projecting or recessed decorative or surface sections.
  • Another object of this invention is to provide a machine tool adapted to form metallic shapes of the type described in a single cycle of operation.
  • a metal working machine comprising an expandable die mechanism adapted to receive thereon a sheet metal cylinder, cam means disposed within said die and operable for expanding it to stretch said cylinder, and an external contracting die including means for contracting it into metal forming contact with said expanding die while the metal of said cylinder is being stretched.
  • Fig. 1 is a top plan view of the metal working machine as provided in accordance with this invention.
  • Fig. 2 is a cross-section taken on line 2-2 of Fig. 1;
  • Fig. 3 is a cross-section taken on line 3-3 of Fig. 2 and showing the dies in retracted position.
  • This invention comprises a metal working machine having a base 10, which may be supported at floor level by means of stanchions 11 disposed below floor level.
  • An expandable die mechanism is supported on the base and comprises a plurality of driver sections 14 arranged about a common center, each of which is formed to have a generally arcuate external die surface 15, and a pair of internal inclined cam surfaces 16.
  • driver sections 14 arranged about a common center, each of which is formed to have a generally arcuate external die surface 15, and a pair of internal inclined cam surfaces 16.
  • a protruding surface section such as 18, one or more of the dies 16 may be provided with a pad 20 which provides the external die surface adapted to form the protruding section 18.
  • the expanding die mechanism may include five so-called driver die sections spaced apart from one another and operatively engaging the driven die sections 22 disposed between adjacent driver sections.
  • the external surfaces of sections 22 are generally arcuate in form and are so designed as to conform with the arcuate surfaces 15 of the driver sections 14 so that the complete die mechanism presents a continuous cylindrical surface when the mechanism is in its fully expanded position.
  • This feature of the invention is important in that it prevents any marking or deforming of the sheet metal cylinder during its forming operation.
  • Driven sections 22 include inclined cam surfaces 23 which cooperate with inclined cam surfaces 24 of driver sections 14 whereby sections 22 are cammed from their inner positions indicated at 25 (Fig. l) to their outer positions as indicated at 26- in Fig. 1.
  • Die sections 14 and 22 may be undercut as at 27 to form a rim onv cylinder 17.
  • the die sections 14 annd 22 rest on and slide on the upper surfaces of the base 10 and are positioned and supported in operative relation with one another by means of an external housing structure comprising in part an upper housing member 28 having a cover 29 clamped in position by means of the bolts 30 threaded into the base 10 at 32 and having enlarged spacer sections 33.
  • an external housing structure comprising in part an upper housing member 28 having a cover 29 clamped in position by means of the bolts 30 threaded into the base 10 at 32 and having enlarged spacer sections 33.
  • Housing 28 and the base 10 is a centrally disposed shaft 34 having fixed thereto a die operating cam 35 having cam surfaces 36 which mate with cam surfaces 16 of driver sections 14.
  • Shaft 34 is supported at its top end in the bearing and seal 37, mounted in cover 29, and includes a cap 38 which extends into bearing and sealing relation with member 37.
  • shaft 34 is supported in a hearing and seal 39 which in turn is supported from the base 10 by means of a collar 40 bolted to base 10 by the stud 41.
  • Shaft 34 may form the extension of a hydraulic piston (not shown) which operates in hydraulic cylinder 42 extending upwardly to the base 10 and sealed and secured thereto by means of collar member 43 bolted to base 10 by machine screws 44.
  • the die members 14 and 22 are confined or restrained into engagement with cam 35 by means of retraction springs 46 and 47, springs 46 being nested within slots 48 in base 10 and operatively associated with die members 14 and 22 by means of L-shaped guides 49.
  • retraction springs 47 are nested within slots 50 formed in the lower surface of housing 28 and operatively associated with the die members 14 and 22 by means of the L-shaped guides 51.
  • Outer dies surround the expanding die and are positioned by means of an external housing 53.
  • the outer dies include arcuate sections 54 having die surfaces which mate with the outer surfaces of inner dies 16 and 22 and cam surfaces 55 and 56 which cooperate with outer cams 58 having cam surfaces 59 and 60.
  • Outer cams 58 may be in the form of a complete annulus or divided into sections and may be operated by one or more hydraulic rams 62 having shafts 63 threaded into cams 58 as shown at 64.
  • a mechanism consisting of the stud bolts 66 threaded into die 54 at 67 and compressing springs 68 within bores 69 in housing 53.
  • springs 68 are compressed so that they function to draw dies 54 outwardly when cam 58 moves to its lowermost position.
  • an ejector consisting of one or more hydraulic rams 71 attached in any suitable manner to the lower surface of the base and including a shaft 72 projecting upwardly in alignment with the space between inner dies 14, 22 and outer dies 54.
  • the ram 71 may be used both for lowering cylinder 17 into position for forming, and elevating cylinder 17 after it is formed to a position where it may be removed from the machine either manually or by means of a hoist.
  • shaft 34 and cam 35 are in their uppermost positions and the die sections 14 and 22 are in their retracted positions.
  • cam 58 is in its lowermost position whereby die sections 54 are retracted to their outermost positions. This leaves a space at 70 between the inner and outer die sections into which a welded cylinder 17 of sheet metal may be dropped.
  • the piston in cylinder 42- may be controlled to draw the shaft 34 downwardly whereby cam 35 drives the driver die sections 14 in an outward direction.
  • the driven die sections 22 project outwardly beyond driver sections 14. It will be apparent from the geometrical relationship between die sections 14 and 22 that the outer surfaces of driven die section 22 project outwardly of the outer surfaces of driver sections 14 until driver sections 14 reach their outermost radial positions to form a continuous cylindrical surface.
  • the driven die sections 22 will engage portions of and stretch the cylinder 17, and the undercut portion 27 of sections 14 and the similar undercut portion of section 22 will begin forming sections of a rim on cylinder 17.
  • the metal of cylinder 17 is stretched and can flow to prevent tearing or fracture.
  • the die sections 22 form sections of a rim on cylinder 17 and then sections 14 will have begun to form intermediate sections of the rim while all the metal is still stretching and in this manner a continuous, smooth and unwrinkled or unbroken rim may be formed on cylinder 17.
  • the operation of the rams 62 may be timed with relation to the operation of cam 35 to be moved upwardly and move outer die sections 54 into contact with cylinder 17 while it is being stretched by inner die sections 14 and 22. This has the effect of laying the metal of the cylinder 17 on to the protruding parts of dies 14 and 22 while the metal is being stretched by dies 14 and 22 At the same time outer dies 54 flow the metal of cylinder 17 into any depressions in the die sections 14 and 22 As a result of the cooperative stretching of cylinder 17 by the inner die sections and the laying of metal on the protruding parts of the die sections, no tearing or wrinkling of cylinder 17 occurs and a rigid casing member is formed in one continuous operation After the forming operation is completed, the machine may be controlled to permit the outer dies to assume their outermost positions and to permit the inner dies to assume their innermost positions, thereby freeing the finished cylinder 17.
  • this invention provides a mechanism adapted to form cylindrical metallic shapes from welded metallic cylinders of sheet metal.
  • the forming process eliminates a series of separate operations on separate pieces of metal and is effective in a single cycle of operation to form a casing member which is relatively rigid and holds its shape.
  • a metal forming device for forming a cylindrical metallic shape comprising a base, a plurality of radially disposed, spaced, driver die sections slidably mounted at their lower ends on said base and each having a die surface in the form of a vertical section of a cylinder, driven die sections disposed between said driver die sections and each having a die surface in the form of a vertical section of a cylinder complementing the adjacent die surfaces of said driver sections to form a complete cylindrical die surface, a cam slidably mounted centrally of said driver die sections and having radially extending cam surfaces engaging each driver section, independent drive means for said cam, said driver and driven die sections having mutually cooperating cam surfaces whereby movement of said centrally disposed cam moves all of said die sections outwardly to form a continuous cylindrical die surface, said mutually cooperating cam surfaces being formed so that said driven die sections reach metal forming position prior to said driver die sections, a cover slidably engaging the upper ends of said die sections, spring means engaging the upper and lower ends of said die sections and said base and

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Bending Of Plates, Rods, And Pipes (AREA)
US662860A 1957-05-31 1957-05-31 Hydraulic expander Expired - Lifetime US2955556A (en)

Priority Applications (2)

Application Number Priority Date Filing Date Title
US662860A US2955556A (en) 1957-05-31 1957-05-31 Hydraulic expander
BE604916A BE604916Q (fr) 1957-05-31 1961-06-13 Expanseur hydraulique

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US662860A US2955556A (en) 1957-05-31 1957-05-31 Hydraulic expander

Publications (1)

Publication Number Publication Date
US2955556A true US2955556A (en) 1960-10-11

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US662860A Expired - Lifetime US2955556A (en) 1957-05-31 1957-05-31 Hydraulic expander

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US (1) US2955556A (fr)
BE (1) BE604916Q (fr)

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3102502A (en) * 1959-01-21 1963-09-03 Taylor Winfield Corp Screw operated expander
US3252695A (en) * 1960-12-05 1966-05-24 Smith Corp A O Apparatus for quenching a metal member
FR2064222A1 (fr) * 1969-10-09 1971-07-16 Dunlop Co Ltd
FR2332082A1 (fr) * 1975-11-24 1977-06-17 Rothenberger Gmbh Co Outil a main pour elargir les extremites de tubes de canalisations
FR2402499A1 (fr) * 1977-09-08 1979-04-06 Westinghouse Electric Corp Outil de formage a epanouissement
GB2563270A (en) * 2017-06-08 2018-12-12 Envases Uk Ltd Deformation of thin walled bodies by registered shaping

Citations (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US284440A (en) * 1883-09-04 James lamont
US1268789A (en) * 1916-11-13 1918-06-04 Standard Welding Company Machine for sizing transplit rims.
US1453647A (en) * 1921-11-09 1923-05-01 William A Waterman Distributing-gate machine
US1556847A (en) * 1920-05-24 1925-10-13 Hydraulic Pressed Steel Co Machine for sizing, cupping, and punching rims
US1625854A (en) * 1925-04-29 1927-04-26 Stromberg Motos Devices Compan Die for naking carburetor frames
US1698999A (en) * 1927-01-24 1929-01-15 American Can Co Necking-in or reforming tubular bodies
US1705843A (en) * 1926-02-19 1929-03-19 American Can Co Method and apparatus for forming an interiorly beaded or looped tearing-strip can
US2198873A (en) * 1937-04-13 1940-04-30 Mullins Mfg Corp Forming bulged receptacles
US2458587A (en) * 1945-01-31 1949-01-11 Gogan Joseph Apparatus for treating hollow bodies

Patent Citations (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US284440A (en) * 1883-09-04 James lamont
US1268789A (en) * 1916-11-13 1918-06-04 Standard Welding Company Machine for sizing transplit rims.
US1556847A (en) * 1920-05-24 1925-10-13 Hydraulic Pressed Steel Co Machine for sizing, cupping, and punching rims
US1453647A (en) * 1921-11-09 1923-05-01 William A Waterman Distributing-gate machine
US1625854A (en) * 1925-04-29 1927-04-26 Stromberg Motos Devices Compan Die for naking carburetor frames
US1705843A (en) * 1926-02-19 1929-03-19 American Can Co Method and apparatus for forming an interiorly beaded or looped tearing-strip can
US1698999A (en) * 1927-01-24 1929-01-15 American Can Co Necking-in or reforming tubular bodies
US2198873A (en) * 1937-04-13 1940-04-30 Mullins Mfg Corp Forming bulged receptacles
US2458587A (en) * 1945-01-31 1949-01-11 Gogan Joseph Apparatus for treating hollow bodies

Cited By (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3102502A (en) * 1959-01-21 1963-09-03 Taylor Winfield Corp Screw operated expander
US3252695A (en) * 1960-12-05 1966-05-24 Smith Corp A O Apparatus for quenching a metal member
FR2064222A1 (fr) * 1969-10-09 1971-07-16 Dunlop Co Ltd
FR2332082A1 (fr) * 1975-11-24 1977-06-17 Rothenberger Gmbh Co Outil a main pour elargir les extremites de tubes de canalisations
FR2402499A1 (fr) * 1977-09-08 1979-04-06 Westinghouse Electric Corp Outil de formage a epanouissement
GB2563270A (en) * 2017-06-08 2018-12-12 Envases Uk Ltd Deformation of thin walled bodies by registered shaping
GB2563270B (en) * 2017-06-08 2019-09-04 Envases Uk Ltd Deformation of thin walled bodies by registered shaping
US11919063B2 (en) 2017-06-08 2024-03-05 Envases (Uk) Limited Deformation of thin walled bodies by registered shaping

Also Published As

Publication number Publication date
BE604916Q (fr) 1961-10-02

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