US3890819A - Apparatus for deforming sheet metal blanks by fluid pressure - Google Patents

Apparatus for deforming sheet metal blanks by fluid pressure Download PDF

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Publication number
US3890819A
US3890819A US382506A US38250673A US3890819A US 3890819 A US3890819 A US 3890819A US 382506 A US382506 A US 382506A US 38250673 A US38250673 A US 38250673A US 3890819 A US3890819 A US 3890819A
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US
United States
Prior art keywords
pressure
annular
clamping
clamping means
central portion
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
US382506A
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English (en)
Inventor
Bruno Deluca
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.)
Centro Sperimentale Metallurgico SpA
Original Assignee
Centro Sperimentale Metallurgico SpA
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 Centro Sperimentale Metallurgico SpA filed Critical Centro Sperimentale Metallurgico SpA
Application granted granted Critical
Publication of US3890819A publication Critical patent/US3890819A/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
    • B21D26/02—Shaping without cutting otherwise than using rigid devices or tools or yieldable or resilient pads, i.e. applying fluid pressure or magnetic forces by applying fluid pressure
    • B21D26/021—Deforming sheet bodies
    • B21D26/025—Means for controlling the clamping or opening of the moulds
    • 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
    • B21D24/00—Special deep-drawing arrangements in, or in connection with, presses
    • B21D24/04—Blank holders; Mounting means therefor
    • B21D24/08—Pneumatically or hydraulically loaded blank holders
    • 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
    • B21D26/02—Shaping without cutting otherwise than using rigid devices or tools or yieldable or resilient pads, i.e. applying fluid pressure or magnetic forces by applying fluid pressure
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T29/00—Metal working
    • Y10T29/49—Method of mechanical manufacture
    • Y10T29/49805—Shaping by direct application of fluent pressure

Definitions

  • Another object of the present invention is the provision of such apparatus, in which the peripheral portions of the blank are gripped with a pressure that varies as the pressure with which the central portion of the blank is deformed.
  • apparatus comprising an outer body 1 which is a figure of revolution and is generally cylindrical or cup-shaped.
  • a blank holder 2 which is also a figure of revolution, is axially slidably disposed within body 1.
  • Piston 3 slides coaxially with a fluidtight fit within blank holder 2.
  • An annular holding die 4 which is also a figure of revolution, is disposed within body 1 in coaxial superposed relation with holder 2 and piston 3, and has an outwardly directed peripheral flange 4 which is received beneath an inwardly directed annular flange 1 at the upper extremity of body 1, and a central opening 4".
  • Die 4 is releasable from the engaged relationship with body 1 which is shown in the drawing, by means of a bayonnet lock or detachable interengaging portions, or other conventional means (not shown). In this way, the assembly can be opened for the insertion and removal of workpieces.
  • Holder 2 has a flat annular surface confronting die 4, which is faced with a gasket 5 of a material softer than either holder 2 or the metal sheet to be deformed.
  • At least one opening 6 extends through the cylindrical axially-extending stem of holder 2 to convey to the radially outer side of holder 2 the same fluid pressure that acts on the radially inner side of holder 2 and on the circular blank 7.
  • holder 2 is provided with an axially extending passageway 8; and the radially inner end of the hole or holes 6 communicates with the passageway 8, while the radially outer end of hole or holes 6 communicates with an annular cylinder chamber 9 defined between body 1 and holder 2.
  • Body 1 is bolted to a support (not shown) by bolts or other fasteners (not shown) that pass through a flange l thereon.
  • the cavity of body 1 in which the head 11 of holder 2 is disposed is cup-shaped and of a depth greater than the depth of the head of holder 2.
  • Seals 12 provide slidably sealed contact between piston 3 and the supporting side walls of passageway'8, and between holder 2 and body 1 on opposite sides of chamber 9.
  • a sheet metal blank in the form ofa circular workpiece 7 is placed on gasket and die 4 is returned to the position shown in the drawing.
  • Holder 2 can then be urged against the workpiece by any desired means (not shown), after which piston 3 is advanced upwardly as seen in the drawing.
  • Passageway 8 and chamber 9 are filled with hydraulic fluid such as oil, whose pressure is increased by the upward movement of piston 3.
  • This upward movement has two effects:
  • the pressure imparted to the hydraulic fluid causes workpiece 7 to deform and bulge upwardly into opening 4", as seen in the drawing; and also the pressure of the hydraulic fluid transmitted through hole or holes 6 to chamber 9, causes holder 2 to advance in the manner of a piston, thereby more tightly clamping the annular peripheral portions of the workpiece against radially inward movement.
  • the area of chamber 9, measured in a plane perpendicular to the axis of the apparatus should be larger than the area of workpiece 7 that is exposed to the fluid by passageway 8, the broad range of ratios of these two areas being 1:1 to l0:l.
  • Apparatus for deforming only a central portion of sheet material by fluid pressure comprising means to clamp a peripherial portion of said material entirely about said central portion while leaving said central portion exposed, means mounting said clamping means for free and unimpeded movement toward said material, means to apply the pressure of a fluid under pressure to said exposed central portion of said material to deform only said central portion of said material, and means to apply said pressure also to said clamping means so that the force with which said peripheral portion is clamped by said clamping means varies directly as said pressure over the entire range of said pressure thereby to maintain said peripheral portion against substantial radially inward movement over said entire range of pressure.
  • said clamping means comprising an annular member, means mounting said annular member for movement toward and away from the material to be clamped, and means for applying said fluid to said material centrally of said annular member.
  • clamping means having a central opening through which said fluid is applied to said material, said applying means comprising at least one opening through said clamping means communicating between said annular chamber and said central opening.
  • said clamping member having a head thereon that defines said annular chamber between said head and the bottom of a cup-shaped recess Within said body.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Physics & Mathematics (AREA)
  • Fluid Mechanics (AREA)
  • Shaping Metal By Deep-Drawing, Or The Like (AREA)
US382506A 1972-07-25 1973-07-25 Apparatus for deforming sheet metal blanks by fluid pressure Expired - Lifetime US3890819A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
IT51741/72A IT965936B (it) 1972-07-25 1972-07-25 Dispositivo di serraggio per lamiere

Publications (1)

Publication Number Publication Date
US3890819A true US3890819A (en) 1975-06-24

Family

ID=11275655

Family Applications (1)

Application Number Title Priority Date Filing Date
US382506A Expired - Lifetime US3890819A (en) 1972-07-25 1973-07-25 Apparatus for deforming sheet metal blanks by fluid pressure

Country Status (5)

Country Link
US (1) US3890819A (fr)
BE (1) BE802743A (fr)
DE (1) DE2337113A1 (fr)
FR (1) FR2193660B3 (fr)
IT (1) IT965936B (fr)

Cited By (29)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4102167A (en) * 1976-01-16 1978-07-25 Black, Sivalls & Bryson, Inc. Method of manufacturing integral fluid pressure rupturable apparatus
US4441350A (en) * 1981-12-15 1984-04-10 Bs&B Safety Systems, Inc. Scored reverse buckling rupture disk manufacturing method
US4458516A (en) * 1983-02-11 1984-07-10 Bs&B Safety Systems, Inc. Method for manufacturing rupture disks
US4481850A (en) * 1981-12-15 1984-11-13 Bs&B Safety Systems, Inc. Scored reverse buckling rupture disk apparatus
US4492103A (en) * 1983-02-11 1985-01-08 Bs&B Safety Systems, Inc. Apparatus for manufacturing rupture disks
US4597151A (en) * 1980-02-04 1986-07-01 Solartron Electronics, Inc. Fluid pressure transmitting diaphragm assembly and method of manufacture
US4731617A (en) * 1986-08-19 1988-03-15 Gray Robert E Apparatus and method for making paraboloidal surfaces
US5157969A (en) * 1989-11-29 1992-10-27 Armco Steel Co., L.P. Apparatus and method for hydroforming sheet metal
US5410132A (en) * 1991-10-15 1995-04-25 The Boeing Company Superplastic forming using induction heating
US5587098A (en) * 1991-04-05 1996-12-24 The Boeing Company Joining large structures using localized induction heating
US5591369A (en) * 1991-04-05 1997-01-07 The Boeing Company Method and apparatus for consolidating organic matrix composites using induction heating
US5599472A (en) * 1991-04-05 1997-02-04 The Boeing Company Resealable retort for induction processing of organic matrix composites or metals
US5624594A (en) * 1991-04-05 1997-04-29 The Boeing Company Fixed coil induction heater for thermoplastic welding
US5641422A (en) * 1991-04-05 1997-06-24 The Boeing Company Thermoplastic welding of organic resin composites using a fixed coil induction heater
US5645744A (en) * 1991-04-05 1997-07-08 The Boeing Company Retort for achieving thermal uniformity in induction processing of organic matrix composites or metals
US5683607A (en) * 1991-10-15 1997-11-04 The Boeing Company β-annealing of titanium alloys
US5705794A (en) * 1991-10-15 1998-01-06 The Boeing Company Combined heating cycles to improve efficiency in inductive heating operations
US5710414A (en) * 1991-04-05 1998-01-20 The Boeing Company Internal tooling for induction heating
US5723849A (en) * 1991-04-05 1998-03-03 The Boeing Company Reinforced susceptor for induction or resistance welding of thermoplastic composites
US5728309A (en) * 1991-04-05 1998-03-17 The Boeing Company Method for achieving thermal uniformity in induction processing of organic matrix composites or metals
US5793024A (en) * 1991-04-05 1998-08-11 The Boeing Company Bonding using induction heating
US5847375A (en) * 1991-04-05 1998-12-08 The Boeing Company Fastenerless bonder wingbox
US5865054A (en) * 1989-08-24 1999-02-02 Aquaform Inc. Apparatus and method for forming a tubular frame member
US5914064A (en) * 1991-10-15 1999-06-22 The Boeing Company Combined cycle for forming and annealing
US6087640A (en) * 1991-10-15 2000-07-11 The Boeing Company Forming parts with complex curvature
GB2354730A (en) * 1999-09-28 2001-04-04 Neutron Holdings Ltd Apparatus for, and method of, moulding an article
US20040256383A1 (en) * 2003-06-18 2004-12-23 Fischer John R. Apparatus and methods for single sheet forming using induction heating
GB2440596A (en) * 2006-07-31 2008-02-06 Stephen Stanger Moore Ferrous fungi/Metal mushrooms
CN103464576A (zh) * 2013-09-23 2013-12-25 上海电机学院 一种汽轮发电机护环补液胀形装置及方法

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3704349A1 (de) * 1987-02-12 1988-08-25 Haar Maschbau Alfons Werkzeug zum tiefziehen von blechteilen
DE4309317A1 (de) * 1993-03-23 1994-09-29 Fraunhofer Ges Forschung Verfahren und Vorrichtung zum Freiformumformen von Halbzeugen
DE19952104A1 (de) * 1999-10-29 2001-05-03 Schuler Smg Gmbh & Co Kg Vorrichtung zum Umformen von Metallblech

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3149596A (en) * 1961-06-13 1964-09-22 Gen Dynamics Corp Forming apparatus
US3373585A (en) * 1964-09-21 1968-03-19 Reynolds Tobacco Co R Sheet metal shaping apparatus and method
US3572071A (en) * 1968-06-07 1971-03-23 Bell Telephone Labor Inc Parabolic reflector antennas
US3596485A (en) * 1968-09-12 1971-08-03 Siemens Elektrogeraete Gmbh Hydromechanical method and device for the reverse redrawing of sheet metal
US3751962A (en) * 1970-11-06 1973-08-14 Reynolds Metals Co Method and apparatus for making a drawn article

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3149596A (en) * 1961-06-13 1964-09-22 Gen Dynamics Corp Forming apparatus
US3373585A (en) * 1964-09-21 1968-03-19 Reynolds Tobacco Co R Sheet metal shaping apparatus and method
US3572071A (en) * 1968-06-07 1971-03-23 Bell Telephone Labor Inc Parabolic reflector antennas
US3596485A (en) * 1968-09-12 1971-08-03 Siemens Elektrogeraete Gmbh Hydromechanical method and device for the reverse redrawing of sheet metal
US3751962A (en) * 1970-11-06 1973-08-14 Reynolds Metals Co Method and apparatus for making a drawn article

Cited By (41)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4102167A (en) * 1976-01-16 1978-07-25 Black, Sivalls & Bryson, Inc. Method of manufacturing integral fluid pressure rupturable apparatus
US4597151A (en) * 1980-02-04 1986-07-01 Solartron Electronics, Inc. Fluid pressure transmitting diaphragm assembly and method of manufacture
US4441350A (en) * 1981-12-15 1984-04-10 Bs&B Safety Systems, Inc. Scored reverse buckling rupture disk manufacturing method
US4481850A (en) * 1981-12-15 1984-11-13 Bs&B Safety Systems, Inc. Scored reverse buckling rupture disk apparatus
US4458516A (en) * 1983-02-11 1984-07-10 Bs&B Safety Systems, Inc. Method for manufacturing rupture disks
US4492103A (en) * 1983-02-11 1985-01-08 Bs&B Safety Systems, Inc. Apparatus for manufacturing rupture disks
US4731617A (en) * 1986-08-19 1988-03-15 Gray Robert E Apparatus and method for making paraboloidal surfaces
US5865054A (en) * 1989-08-24 1999-02-02 Aquaform Inc. Apparatus and method for forming a tubular frame member
US5157969A (en) * 1989-11-29 1992-10-27 Armco Steel Co., L.P. Apparatus and method for hydroforming sheet metal
US5372026A (en) * 1989-11-29 1994-12-13 Armco Steel Company Apparatus and method for hydroforming sheet metal
US5591369A (en) * 1991-04-05 1997-01-07 The Boeing Company Method and apparatus for consolidating organic matrix composites using induction heating
US5683608A (en) * 1991-04-05 1997-11-04 The Boeing Company Ceramic die for induction heating work cells
US5847375A (en) * 1991-04-05 1998-12-08 The Boeing Company Fastenerless bonder wingbox
US5591370A (en) * 1991-04-05 1997-01-07 The Boeing Company System for consolidating organic matrix composites using induction heating
US5599472A (en) * 1991-04-05 1997-02-04 The Boeing Company Resealable retort for induction processing of organic matrix composites or metals
US5624594A (en) * 1991-04-05 1997-04-29 The Boeing Company Fixed coil induction heater for thermoplastic welding
US5641422A (en) * 1991-04-05 1997-06-24 The Boeing Company Thermoplastic welding of organic resin composites using a fixed coil induction heater
US5645744A (en) * 1991-04-05 1997-07-08 The Boeing Company Retort for achieving thermal uniformity in induction processing of organic matrix composites or metals
US6040563A (en) * 1991-04-05 2000-03-21 The Boeing Company Bonded assemblies
US5587098A (en) * 1991-04-05 1996-12-24 The Boeing Company Joining large structures using localized induction heating
US6211497B1 (en) 1991-04-05 2001-04-03 The Boeing Company Induction consolidation system
US7126096B1 (en) 1991-04-05 2006-10-24 Th Boeing Company Resistance welding of thermoplastics in aerospace structure
US5710414A (en) * 1991-04-05 1998-01-20 The Boeing Company Internal tooling for induction heating
US5723849A (en) * 1991-04-05 1998-03-03 The Boeing Company Reinforced susceptor for induction or resistance welding of thermoplastic composites
US5728309A (en) * 1991-04-05 1998-03-17 The Boeing Company Method for achieving thermal uniformity in induction processing of organic matrix composites or metals
US5747179A (en) * 1991-04-05 1998-05-05 The Boeing Company Pack for inductively consolidating an organic matrix composite
US5793024A (en) * 1991-04-05 1998-08-11 The Boeing Company Bonding using induction heating
US5700995A (en) * 1991-10-15 1997-12-23 The Boeing Company Superplastically formed part
US5410132A (en) * 1991-10-15 1995-04-25 The Boeing Company Superplastic forming using induction heating
US5705794A (en) * 1991-10-15 1998-01-06 The Boeing Company Combined heating cycles to improve efficiency in inductive heating operations
US5914064A (en) * 1991-10-15 1999-06-22 The Boeing Company Combined cycle for forming and annealing
US5683607A (en) * 1991-10-15 1997-11-04 The Boeing Company β-annealing of titanium alloys
US6087640A (en) * 1991-10-15 2000-07-11 The Boeing Company Forming parts with complex curvature
US5571436A (en) * 1991-10-15 1996-11-05 The Boeing Company Induction heating of composite materials
US5821506A (en) * 1991-10-15 1998-10-13 The Boeing Company Superplastically formed part
GB2354730A (en) * 1999-09-28 2001-04-04 Neutron Holdings Ltd Apparatus for, and method of, moulding an article
GB2354730B (en) * 1999-09-28 2001-09-12 Neutron Holdings Ltd Apparatus for, and method of, moulding an article
US20040256383A1 (en) * 2003-06-18 2004-12-23 Fischer John R. Apparatus and methods for single sheet forming using induction heating
US6914225B2 (en) 2003-06-18 2005-07-05 The Boeing Company Apparatus and methods for single sheet forming using induction heating
GB2440596A (en) * 2006-07-31 2008-02-06 Stephen Stanger Moore Ferrous fungi/Metal mushrooms
CN103464576A (zh) * 2013-09-23 2013-12-25 上海电机学院 一种汽轮发电机护环补液胀形装置及方法

Also Published As

Publication number Publication date
BE802743A (fr) 1973-11-16
DE2337113A1 (de) 1974-02-07
FR2193660B3 (fr) 1976-07-09
IT965936B (it) 1974-02-11
FR2193660A1 (fr) 1974-02-22

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