US3623347A - Method for the hydromechanical drawing of workpieces - Google Patents

Method for the hydromechanical drawing of workpieces Download PDF

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Publication number
US3623347A
US3623347A US826465A US3623347DA US3623347A US 3623347 A US3623347 A US 3623347A US 826465 A US826465 A US 826465A US 3623347D A US3623347D A US 3623347DA US 3623347 A US3623347 A US 3623347A
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US
United States
Prior art keywords
blank
container
die
plunger
liquid
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
US826465A
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English (en)
Inventor
Eugen Burk
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.)
SEG Hausgeraete GmbH
Original Assignee
Siemens Elektrogaerate GmbH
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Filing date
Publication date
Application filed by Siemens Elektrogaerate GmbH filed Critical Siemens Elektrogaerate GmbH
Application granted granted Critical
Publication of US3623347A publication Critical patent/US3623347A/en
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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
    • 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
    • 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
    • B21D26/029—Closing or sealing means
    • 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
    • B21D9/00—Bending tubes using mandrels or the like
    • B21D9/12—Bending tubes using mandrels or the like by pushing over a curved mandrel; by pushing through a curved die
    • B21D9/125—Bending tubes using mandrels or the like by pushing over a curved mandrel; by pushing through a curved die by pushing through a curved die

Definitions

  • Circular and other blanks of sheet metal and the like workpieces are shaped by hydromechanical drawing with the aid of a rigid container for liquid, a liquid displacing plunger of tubular shape which is movable relative to the container, and a shaping die having a cavity corresponding to the shape to be imparted to the workpiece.
  • the blank is placed on top of the plunger and the die is placed on top of the blank with the die cavity facing the blank. Then the die and the blank are pressed against the container thus sealing the container and forcing the plunger into the con tainer. This increases the liquid pressure and draws the blank into the die cavity.
  • My invention relates ot the shaping of circular and other sheet-metal blanks or the like workpieces by hydromechanical drawing with the aid of a pressure container filled with liquid, a displacer structure which holds the workpiece and is movable relative to the pressure container, and a shaping die.
  • the hydromechanical drawing process is performed by filling the pressure container with drawing liquid up to its rim, then placing a workpiece blank on top of the container and pressure-tightly covering the container by pressing the blank against the container, whereupon the workpiece is drawn into the container by pressing the plunger into the container to displace the liquid and causing the increasing liquid pressure to draw the blank into the cavity of the die.
  • the device for performing the method is provided with a cup-shaped, upwardly open pressure container "ice which constitutes the bottom portion of the equipment and in which the plunger structure is slidably and pressure-tightly mounted, the external portions of this structure forming the recipient for the edge of the blank to be drawn.
  • the equipment further comprises an upper portion which is designed as the shaping die and by means of which the workpiece blank is tightly forced against the plunger and the plunger is pressed into the bottom portion of the equipment.
  • a particularly simple design is achieved when bracing the plunger structure of the drawing tool relative to the bottom portion by means of springs so that, when the press is opened, the plunger will automatically return to its starting position.
  • hydraulic or pneumatic resetting members may also be employed.
  • the shaping member or die appertaining to the upper portion of the equipment is given a plural-part design or is provided with slidable components.
  • FIG. 1 shows in cross section a first drawing device
  • FIG. 2 shows in section and on larger scale a portion of the same device
  • FIG. 3 illustrates in section a second embodiment for producing a workpiece having an undercut cross-sectional shape.
  • the device according to FIG. 1 comprises a generally cup-shaped, upwardly open pressure container 1 which forms part of the bottom portion 2 of the drawing equipment.
  • a displacer body 3 in the form of a flanged tubular plunger is guided in the bottom portion 2 so as to be ccaxially movable relative thereto.
  • the flange 4 of the plunger 3 forms a supporting face which has a coaxial groove into which a sealing gasket 5 is placed.
  • the upper portion of the drawing device comprises a shaping structure or die 7 with a downwardly open cavtiy whose shape matches that of the shaped work to be produced.
  • the displacer body 3 is braced against the bottom portion 1 by peripherally distributed coil springs 8. Suitable seals 9 provide for a tight closure of the pressure container 1.
  • Ducts 10 and 11 permit filling the pressure container with liquid and controlling the drawing pressure.
  • Spacers 12 are placed onto the flange 4.
  • FIG. 2 shows a portion of the flange 4 with the inserted ring-shaped gasket seal 5, the workpiece blank 6 and the inserted spacers 12.
  • the spacers prevent the blank 6 from being excessively pressed by the die 7.
  • the height of the spacers 12 is such that the pressure between the die and the seal 5 cannot exceed a predetermined amount in order to secure the desired gliding of the workpiece 6 into the cavity of the die 7 during the drawing operation.
  • the modified device shown in FIG. 3 is similar to that of FIGS. 1 and 2, except that the die 7 is composed of several parts. That is, the die structure is provided with sliders 18. This permits drawing the workpiece 19 so that it obtains an undercut configuration as shown.
  • the device is inserted into, or forms part of a press, the bottom portion 2 being mounted on the lower platen.
  • the die 7 may be secured to the top platen so as to be lifted by the press machinery.
  • the springs 8 hold the plunger 3 in lifted position.
  • Device for shaping blanks of sheet metal and the like workpieces by hydromechanical drawing comprising an upwardly open container for pressure liquid having liquid supply ducts, an axially elongated plunger having a central bore for accommodating at least a portion of said liquid, said plunger having a lower portion permanently disposed and glidably and pressure-tightly displaceable in said container, said plunger having scalable means for receiving the workpiece blank across the central bore so that the blank when pressed against the plunger forms a closure of said container, and a pressure die removable from said plunger and having a downwardly open cavity corresponding to the shape to be imparted to the workpiece, said die being in pressure-transmitting contact with the peripheral margin of the blank on top of said plunger when in operation, whereby movement of the die under pressure toward the container forces the plunger further inward of the container toward the bottom thereof whereby the increasing liquid pressure causes the blank to be drawn into the die cavity.
  • a device wherein said container has a wall surrounding said plunger, said wall having an end face defining the upwardly directed opening of said container, said plunger having a flange extending laterally from the upper portion thereof so as to extend out over said end face, and said device comprising spring means mounted between said flange and said container for urging said plunger in the upward direction.
  • said sealable means of said plunger being formed by a seal surrounding said central bore, and spacers disposed on top of said plunger for preventing the blank to be shaped to be excessively pressed by said die, said spacers having a vertical height corresponding to the thickness of the blank.
  • said die comprising a plurality of component parts conjointly shaped for providing an undercut configuration of the die cavity.
  • said upper portion of said plunger forming a coaxial flange and having a groove coaxially around the top opening of said bore, and a sealing ring seated in said groove and engageable by the blank so as to form said scalable means for receiving the blank.
  • a device comprising spacers engaging said flange on the top face thereof and being mutually spaced around said ring, said spacers having a vertical height corresponding to the thickness of the workpiece blank to be shaped.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Physics & Mathematics (AREA)
  • Fluid Mechanics (AREA)
  • Shaping Metal By Deep-Drawing, Or The Like (AREA)
US826465A 1968-05-24 1969-05-21 Method for the hydromechanical drawing of workpieces Expired - Lifetime US3623347A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE19681752424 DE1752424A1 (de) 1968-05-24 1968-05-24 Verfahren zum hydromechanischen Ziehen

Publications (1)

Publication Number Publication Date
US3623347A true US3623347A (en) 1971-11-30

Family

ID=5692779

Family Applications (1)

Application Number Title Priority Date Filing Date
US826465A Expired - Lifetime US3623347A (en) 1968-05-24 1969-05-21 Method for the hydromechanical drawing of workpieces

Country Status (7)

Country Link
US (1) US3623347A (xx)
AT (1) AT287446B (xx)
BE (1) BE733238A (xx)
CH (1) CH485500A (xx)
DE (1) DE1752424A1 (xx)
FR (1) FR2009292A1 (xx)
GB (1) GB1211314A (xx)

Cited By (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3974675A (en) * 1974-09-06 1976-08-17 Tokyo Sharyo Seizo Kabushiki Kaisha Molding device
US4266416A (en) * 1978-03-31 1981-05-12 Swiss Aluminium Ltd. Device for the production of blisters
US5157969A (en) * 1989-11-29 1992-10-27 Armco Steel Co., L.P. Apparatus and method for hydroforming sheet metal
US5865054A (en) * 1989-08-24 1999-02-02 Aquaform Inc. Apparatus and method for forming a tubular frame member
CN101791652A (zh) * 2010-03-03 2010-08-04 上海交通大学 薄板内高压渐变成形装置
CN105522029A (zh) * 2016-01-06 2016-04-27 北京航空航天大学 一种板材液压成形高压液室的通用装置
CN107825755A (zh) * 2017-11-06 2018-03-23 于浩 一种便于调节的模具制造装置
RU205894U1 (ru) * 2020-11-16 2021-08-11 Общество с ограниченной ответственностью "Газпром добыча Иркутск" (ООО "Газпром добыча Иркутск") Устройство для изготовления предохранительных мембран
WO2022116126A1 (en) * 2020-12-04 2022-06-09 The Hong Kong Polytechnic University Apparatus and method for forming shape of metal foil products with wrinkleless surface

Families Citing this family (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4362037A (en) * 1980-10-24 1982-12-07 Emhart Industries, Inc. Hollow article internal pressure forming apparatus and method
DE10114629A1 (de) * 2001-03-23 2002-09-26 Schuler Smg Gmbh & Co Kg Vorrichtung zum hydromechanischen Tiefziehen eines Metallbleches
DE102007027804A1 (de) * 2007-06-13 2008-12-18 Technische Universität Dresden Einrichtung zum Tiefziehen von Blechen
CN113751569A (zh) * 2021-08-20 2021-12-07 西安飞机工业（集团）有限责任公司 一种飞机舱盖蒙皮充液成形方法

Cited By (12)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3974675A (en) * 1974-09-06 1976-08-17 Tokyo Sharyo Seizo Kabushiki Kaisha Molding device
US4266416A (en) * 1978-03-31 1981-05-12 Swiss Aluminium Ltd. Device for the production of blisters
US4409808A (en) * 1978-03-31 1983-10-18 Swiss Aluminium Ltd. Process for the production of blisters
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
CN101791652A (zh) * 2010-03-03 2010-08-04 上海交通大学 薄板内高压渐变成形装置
CN101791652B (zh) * 2010-03-03 2011-08-31 上海交通大学 薄板内高压渐变成形装置
CN105522029A (zh) * 2016-01-06 2016-04-27 北京航空航天大学 一种板材液压成形高压液室的通用装置
CN107825755A (zh) * 2017-11-06 2018-03-23 于浩 一种便于调节的模具制造装置
RU205894U1 (ru) * 2020-11-16 2021-08-11 Общество с ограниченной ответственностью "Газпром добыча Иркутск" (ООО "Газпром добыча Иркутск") Устройство для изготовления предохранительных мембран
WO2022116126A1 (en) * 2020-12-04 2022-06-09 The Hong Kong Polytechnic University Apparatus and method for forming shape of metal foil products with wrinkleless surface

Also Published As

Publication number Publication date
GB1211314A (en) 1970-11-04
BE733238A (xx) 1969-11-19
AT287446B (de) 1971-01-25
FR2009292A1 (xx) 1970-01-30
DE1752424A1 (de) 1971-07-15
CH485500A (de) 1970-02-15

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