US3810372A - Die - Google Patents

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Publication number
US3810372A
US3810372A US00301737A US30173772A US3810372A US 3810372 A US3810372 A US 3810372A US 00301737 A US00301737 A US 00301737A US 30173772 A US30173772 A US 30173772A US 3810372 A US3810372 A US 3810372A
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US
United States
Prior art keywords
die
workpiece
casing
deformable
chamber
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
US00301737A
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English (en)
Inventor
C Queyroix
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.)
Alcan Holdings Switzerland AG
Original Assignee
Alusuisse Holdings AG
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 Alusuisse Holdings AG filed Critical Alusuisse Holdings AG
Application granted granted Critical
Publication of US3810372A publication Critical patent/US3810372A/en
Anticipated expiration legal-status Critical
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
    • B21D26/00—Shaping without cutting otherwise than using rigid devices or tools or yieldable or resilient pads, i.e. applying fluid pressure or magnetic forces
    • B21D26/14—Shaping without cutting otherwise than using rigid devices or tools or yieldable or resilient pads, i.e. applying fluid pressure or magnetic forces applying magnetic forces

Definitions

  • ABSTRACT A die for magnetically forming impressions in a tubular metal workpiece.
  • the die comprises a rigid hollow body having at least one aperture therein for introducing a workpiece and an induction coil and a tubular elastically deformable casing mounting, at least one impression in intaglio or in relief.
  • One end of the casing is fixed in said at least one aperture so as to define an annular, hermetically sealed chamber between itself and the inner wall of the hollow body.
  • a conduit is provided for the introduction or removal of a fluid into or from said chamber to permit the forming and subsequent removal of a formed workpiece respectively.
  • the present invention relates to a die.
  • the magnetic forming of impressions on a tubular metal workpiece is known (for example from German Patent No. -l,l22,l88). This is achieved by disposing the tubular metal workpiece between a coil and a die, and discharging a capacitor in the coil to produce induced current in the metal workpiece. The interaction between the magnetic field of the coil and the induced field has the effect of causing an expansion force to act on the metal work-piece. The resulting expansion is limited by a die, so that the metal workpiece deforms according to the relief of the die.
  • Dies used hitherto are constructed in the manner of moulds and comprise two rigid shells which are separated in order to position a workpiece to be formed within them and are then re-assembled in order to close the die.
  • the interface of the shells of the die leaves a mark on the magnetically formed object which even great operating precision does not completely eliminate.
  • the extraction of the magnetically formed workpiece from the die may be difficult, or even impossible, as the separation of two semi-cylindrical shells is complicated if the die has impr'essions which terminate adjacent the interface. In such cases it is necessary to' divide the shells and to separate them radially, which considerably complicates the manufacture of the die and'leaves the marks of at least a second interface.
  • the object of the present invention is to provide a die for magnetically forming impressions on a tubular metal workpiece which obviates or mitigates the aforementioned drawbacks.
  • a die for magnetically forming impressions in a tubular metal workpiece comprising a rigid hollow body having at least one aperture therein for introducing the workpiece and an induction coil, a tubular, elastically deformable casing, mounting at least one impression in intaglio or in relief and being fixed by its ends to the hollow body, one end being fixed in said at least one aperture so as to define an annular, hermetically sealed chamber between itself and the inner wall of the hollow body, and a conduit to provide for the introduction or removal or a fluid into or from said chamber respectively.
  • FIG. I is an axial sectional view of a die according to the present invention.
  • FIG. 2 is a sectional view through the FIG. 1 embodiment when provided with a first reinforcement means
  • FIG. 3 is a sectional view through the FIG. 1 embodiment when provided with second reinforcement means
  • FIG. 4 is a sectional view through the FIG. 1 embodiment when provided with a third reinforcement means.
  • Thedie illustrated in FIG. I comprises a rigid cylindrical hollow body 1 of for example metal or a synthetic material such as nylon.
  • the body 1 has two opposed circular apertures 2 and 3.
  • Flexible means including a tubular casing 4 of elastically deformable material has the two ends thereof fixed at the apertures 2 and 3.
  • the casing 4 can comprise for example rubber having a hardness of to Shore A, and its inner or working surface is provided with impressions 5 in the form of annular grooves.
  • the ends of the casing 4 are secured to the body 1 by means of two rings 6 and 7 which are expanded mechanically or by magnetic forming in order to grip the edge of the casing 4 between the body 1.
  • Means for selectively effecting contraction and expansion of the casing 4 comprise the casing 4 and the cylindrical shell of the body I which define an annular- Once the blank 11 is in position, the oil under pres sure is introduced into the chamber 8, the pressure having the effect of applying the casing 4 against-the blank 11 as illustrated at 4'. The discharge current is then passed through the coil 10 and the blank 11 deforms due to radial expansion, thus following the relief 5 of the die.
  • the die may be cooled by means of the compression fluid, thus making it possible to achieve high operating speeds without any danger of damaging the die or the induction coil.
  • FIGS. 2, 3 and 4 show three possible solutions.
  • the casing 4 is surrounded by a tubular steel sheath 12 which is split along a generatrix 13 to form a spring.
  • the casing 4 is surrounded by four arcuate members 14, 15, 16 and 17 which are spaced apart and held against the casing 4 by a number of coil springs 18.
  • the casing 4 is reinforced by means of metal wires 19 provided in the body thereof and extending either parallel to the generatrices of the casing 4 or in the formof helixe s.
  • the casing 4 could occupy whenin the stationary position, the position 4, the die being opened, i.e. brought into the position 4 or 4 by creating a vacuum in the chamber 8.
  • the die Since the die is formed in one piece and since the resultant of the forces of expansion is, as a rule, zero, it does not need to be secured in a rigid manner to its support, i.e. to the frame of the machine, but may be mounted on a moving arm and introduced, with the workpiece to be formed, on to the coil. In this case, it is thus possible to eliminate the aperture 2.
  • a die for magnetically forming a selected impression in a tubular metal workpiece comprising a rigid hollow body having at least one aperture therein for introducing the workpiece and an induction coil inserted therein, a tubular, elastically deformable casing having an inner surface corresponding to a selected impression and fixed by its ends to the hollow body, one end being fixed in said at least one aperture so as to define an annular, hermetically sealed chamber between said casing and the inner wall of the hollow body, and a conduit to provide for the introduction or removal of a-fluid into or from said chamber respectively to effect deformation of said casing.
  • a die according to claim 1 further comprising rigid members distributed around said casing surrounding same to conform with its surface, and springs surrounding the rigid members.
  • a die according to claim 1 further comprising a steel tube split along one generatrix and surrounding said casing to reinforce same.
  • flexible means having a working surface having a relief impression corresponding to the selected impression and configured to receive therein both the workpiece and the inserted electromagnetic coil for contracting to closely fit said working surface about the workpiece and for expanding to define a clearance between said working surface and the workpiece; and means for selectively effecting the contraction of said flexible means to enable the electromagnetic coil when energized to impress the selected pattern on the workpiece and for selectively effecting the expansion of said flexible means when the electromagnetic coil is deenergized to enable both insertion and removal of the workpiece.
  • said flexible means comprises an elastically deformable cylindrical die having an inner surface corresponding to said working surface; and wherein said means for selectively effecting the contraction and expansion of said flexible means comprises means defining a fluidtight fluid chamber one wall of which comprising said elastically deformable cylindrical die and receptive of pressurized fluid into and out of said chamber to effect movement of the deformable die.
  • said flexible means further comprises reinforcing means for reinforcing said deformable die.
  • said reinforcing means comprises rigid members disposed on the outer surface of said deformable die and springs surrounding said members.
  • said reinforcing means comprises a rigid tube disposed about said deformable die and having means defining a slot along the whole length thereof.
  • said reinforcing means comprises metal wire disposed in the body of said deformable die.

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  • Physics & Mathematics (AREA)
  • Fluid Mechanics (AREA)
  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Shaping Metal By Deep-Drawing, Or The Like (AREA)
US00301737A 1971-11-05 1972-10-30 Die Expired - Lifetime US3810372A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CH1611071A CH544594A (fr) 1971-11-05 1971-11-05 Matrice pour le formage d'empreintes sur une pièce métallique tubulaire par déformation magnétique

Publications (1)

Publication Number Publication Date
US3810372A true US3810372A (en) 1974-05-14

Family

ID=4414541

Family Applications (1)

Application Number Title Priority Date Filing Date
US00301737A Expired - Lifetime US3810372A (en) 1971-11-05 1972-10-30 Die

Country Status (15)

Country Link
US (1) US3810372A (enrdf_load_stackoverflow)
JP (1) JPS5622720B2 (enrdf_load_stackoverflow)
AT (1) AT324095B (enrdf_load_stackoverflow)
BE (1) BE790566A (enrdf_load_stackoverflow)
CA (1) CA1004728A (enrdf_load_stackoverflow)
CH (1) CH544594A (enrdf_load_stackoverflow)
DE (1) DE2253351C3 (enrdf_load_stackoverflow)
DK (1) DK137169B (enrdf_load_stackoverflow)
FI (1) FI57222C (enrdf_load_stackoverflow)
FR (1) FR2158293B1 (enrdf_load_stackoverflow)
GB (1) GB1383605A (enrdf_load_stackoverflow)
IT (1) IT969989B (enrdf_load_stackoverflow)
NL (1) NL149094B (enrdf_load_stackoverflow)
NO (1) NO136701C (enrdf_load_stackoverflow)
SE (1) SE398716B (enrdf_load_stackoverflow)

Cited By (16)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4947667A (en) * 1990-01-30 1990-08-14 Aluminum Company Of America Method and apparatus for reforming a container
US5331832A (en) * 1993-08-23 1994-07-26 Xerox Corporation Sleeve sizing processes
US5634364A (en) * 1995-12-04 1997-06-03 Reynolds Metals Company Segmented coil for use in electromagnetic can forming
US5687599A (en) * 1996-01-04 1997-11-18 Reynolds Metals Company Method of forming a can with an electromagnetically formed contoured sidewall and necked end
WO1997045216A1 (en) * 1996-05-29 1997-12-04 Northrop Grumman Corporation Method and forming die for fabricating torque joints
US5776270A (en) * 1996-01-02 1998-07-07 Aluminum Company Of America Method for reforming a container and container produced thereby
US5794474A (en) * 1997-01-03 1998-08-18 Ball Corporation Method and apparatus for reshaping a container body
US5855053A (en) * 1996-06-18 1999-01-05 Northrop Grumman Corporation Method and forming die for fabricating spiral groove torque tube assemblies
US5916317A (en) * 1996-01-04 1999-06-29 Ball Corporation Metal container body shaping/embossing
US6079244A (en) * 1996-01-04 2000-06-27 Ball Corporation Method and apparatus for reshaping a container body
US6151939A (en) * 1996-01-04 2000-11-28 Delaware Capital Formation, Inc. Can shaping apparatus
WO2001081021A3 (en) * 2000-04-26 2002-02-07 Cosma Int Inc Hydroforming a tubular structure of varying diameter from a tubular blank using electromagnetic pulse welding
US6700285B1 (en) 1999-08-20 2004-03-02 Bayerische Motoren Werke Ag Electrical rotating machine having a rotor and a stator each having a non-rotatable connection between carrying element and laminations, and method of making same
US10596655B2 (en) 2016-08-12 2020-03-24 Baker Hughes, A Ge Company, Llc Magnetic pulse actuation arrangement for downhole tools and method
US10626705B2 (en) 2018-02-09 2020-04-21 Baer Hughes, A Ge Company, Llc Magnetic pulse actuation arrangement having layer and method
US10801283B2 (en) 2016-08-12 2020-10-13 Baker Hughes, A Ge Company, Llc Magnetic pulse actuation arrangement for downhole tools and method

Families Citing this family (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4327471A (en) * 1979-03-28 1982-05-04 Akzona Incorporated Hydrostatic pipe splicing method
US4330918A (en) * 1979-03-28 1982-05-25 Akzona Incorporated Hydrostatic pipe splicing apparatus
WO1983002580A1 (en) * 1982-01-25 1983-08-04 Akzona Inc Hydrostatic pipe splicing method and apparatus
AT392748B (de) * 1989-05-09 1991-05-27 Austria Metall Teilbarer magnetfeldkonzentrator
DE4202808C2 (de) * 1992-01-31 1996-10-02 Westfalia Metallformtechnik Gm Verfahren zum Herstellen eines Leitungselements und Vorrichtung zur Durchführung des Verfahrens
DE19715351A1 (de) * 1997-04-12 1998-10-15 Steingroever Magnet Physik Verfahren und Vorrichtung zum Herstellen von metallischen Hohlkörpern mit Beul-Struktur
DE19802769C1 (de) * 1998-01-26 1999-07-08 Erbsloeh Ag Hohlprofil für die Metallverformung mittels eines Magnetfeldes
US10081045B2 (en) 2014-05-04 2018-09-25 Belvac Production Machinery Inc. Systems and methods for electromagnetic forming of containers
RU207657U1 (ru) * 2020-08-26 2021-11-09 Общество с ограниченной ответственностью "Терра-сталь Групп" Плавающая оправка для волочения труб с ультразвуковыми колебаниями
CN115742616B (zh) * 2022-12-09 2025-06-27 山东桂冠机械有限公司 一种食品存储金属罐图标压印变形加工设备

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3149372A (en) * 1960-07-21 1964-09-22 Du Pont Electromagnetic apparatus
US3555866A (en) * 1969-07-03 1971-01-19 Continental Can Co Electropneumatic and electrohydraulic re-forming of tubing and the like
US3570297A (en) * 1968-09-19 1971-03-16 Raymond A Matthews Die and method for drawing metal tubes
US3618350A (en) * 1969-12-15 1971-11-09 Boeing Co Reusable tooling for electromagnetic forming

Family Cites Families (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR999306A (enrdf_load_stackoverflow) * 1952-01-29
JPS439344Y1 (enrdf_load_stackoverflow) * 1965-01-18 1968-04-23

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3149372A (en) * 1960-07-21 1964-09-22 Du Pont Electromagnetic apparatus
US3570297A (en) * 1968-09-19 1971-03-16 Raymond A Matthews Die and method for drawing metal tubes
US3555866A (en) * 1969-07-03 1971-01-19 Continental Can Co Electropneumatic and electrohydraulic re-forming of tubing and the like
US3618350A (en) * 1969-12-15 1971-11-09 Boeing Co Reusable tooling for electromagnetic forming

Cited By (24)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO1991011274A1 (en) * 1990-01-30 1991-08-08 Aluminum Company Of America Method and apparatus for reforming a container
US4947667A (en) * 1990-01-30 1990-08-14 Aluminum Company Of America Method and apparatus for reforming a container
US5331832A (en) * 1993-08-23 1994-07-26 Xerox Corporation Sleeve sizing processes
US5836070A (en) * 1994-04-12 1998-11-17 Northrop Grumman Corporation Method and forming die for fabricating torque joints
US5634364A (en) * 1995-12-04 1997-06-03 Reynolds Metals Company Segmented coil for use in electromagnetic can forming
US5776270A (en) * 1996-01-02 1998-07-07 Aluminum Company Of America Method for reforming a container and container produced thereby
US6079244A (en) * 1996-01-04 2000-06-27 Ball Corporation Method and apparatus for reshaping a container body
US5916317A (en) * 1996-01-04 1999-06-29 Ball Corporation Metal container body shaping/embossing
US5687599A (en) * 1996-01-04 1997-11-18 Reynolds Metals Company Method of forming a can with an electromagnetically formed contoured sidewall and necked end
US6151939A (en) * 1996-01-04 2000-11-28 Delaware Capital Formation, Inc. Can shaping apparatus
US6343496B1 (en) 1996-01-04 2002-02-05 Delaware Capital Formation, Ltd. Can shaping apparatus and method
WO1997045216A1 (en) * 1996-05-29 1997-12-04 Northrop Grumman Corporation Method and forming die for fabricating torque joints
AU713250B2 (en) * 1996-05-29 1999-11-25 Northrop Grumman Corporation Method and forming die for fabricating torque joints
US5855053A (en) * 1996-06-18 1999-01-05 Northrop Grumman Corporation Method and forming die for fabricating spiral groove torque tube assemblies
US5794474A (en) * 1997-01-03 1998-08-18 Ball Corporation Method and apparatus for reshaping a container body
US6700285B1 (en) 1999-08-20 2004-03-02 Bayerische Motoren Werke Ag Electrical rotating machine having a rotor and a stator each having a non-rotatable connection between carrying element and laminations, and method of making same
EP1079498B1 (de) * 1999-08-20 2007-07-11 Bayerische Motoren Werke Aktiengesellschaft Elektrische Maschine mit einem Rotor und einem Stator
WO2001081021A3 (en) * 2000-04-26 2002-02-07 Cosma Int Inc Hydroforming a tubular structure of varying diameter from a tubular blank using electromagnetic pulse welding
US6474534B2 (en) 2000-04-26 2002-11-05 Magna International Inc. Hydroforming a tubular structure of varying diameter from a tubular blank made using electromagnetic pulse welding
US10596655B2 (en) 2016-08-12 2020-03-24 Baker Hughes, A Ge Company, Llc Magnetic pulse actuation arrangement for downhole tools and method
US10801283B2 (en) 2016-08-12 2020-10-13 Baker Hughes, A Ge Company, Llc Magnetic pulse actuation arrangement for downhole tools and method
US11014191B2 (en) 2016-08-12 2021-05-25 Baker Hughes, A Ge Company, Llc Frequency modulation for magnetic pressure pulse tool
US11465229B2 (en) 2016-08-12 2022-10-11 Baker Hughes, LLC Frequency modulation for magnetic pressure pulse tool
US10626705B2 (en) 2018-02-09 2020-04-21 Baer Hughes, A Ge Company, Llc Magnetic pulse actuation arrangement having layer and method

Also Published As

Publication number Publication date
NL149094B (nl) 1976-04-15
DE2253351C3 (de) 1975-05-28
FR2158293B1 (enrdf_load_stackoverflow) 1977-04-01
FR2158293A1 (enrdf_load_stackoverflow) 1973-06-15
NL7214853A (enrdf_load_stackoverflow) 1973-05-08
DE2253351A1 (de) 1973-05-10
FI57222C (fi) 1980-07-10
FI57222B (fi) 1980-03-31
NO136701B (enrdf_load_stackoverflow) 1977-07-18
JPS4857703A (enrdf_load_stackoverflow) 1973-08-14
JPS5622720B2 (enrdf_load_stackoverflow) 1981-05-27
GB1383605A (en) 1974-02-12
BE790566A (fr) 1973-02-15
DK137169C (enrdf_load_stackoverflow) 1978-06-26
CH544594A (fr) 1973-11-30
SE398716B (sv) 1978-01-16
NO136701C (no) 1977-10-26
CA1004728A (en) 1977-02-01
DK137169B (da) 1978-01-30
IT969989B (it) 1974-04-10
AT324095B (de) 1975-08-11
DE2253351B2 (de) 1974-10-17

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