US3875778A - Hydraulic press - Google Patents

Hydraulic press Download PDF

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Publication number
US3875778A
US3875778A US407506A US40750673A US3875778A US 3875778 A US3875778 A US 3875778A US 407506 A US407506 A US 407506A US 40750673 A US40750673 A US 40750673A US 3875778 A US3875778 A US 3875778A
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US
United States
Prior art keywords
transverse faces
press
strip seals
recess
pad
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
US407506A
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English (en)
Inventor
Keijo Eugen Hellgren
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.)
ABB Norden Holding AB
Original Assignee
ASEA AB
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 ASEA AB filed Critical ASEA AB
Application granted granted Critical
Publication of US3875778A publication Critical patent/US3875778A/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
    • B21D22/00—Shaping without cutting, by stamping, spinning, or deep-drawing
    • B21D22/10—Stamping using yieldable or resilient pads
    • B21D22/12—Stamping using yieldable or resilient pads using enclosed flexible chambers
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B30—PRESSES
    • B30B—PRESSES IN GENERAL
    • B30B5/00—Presses characterised by the use of pressing means other than those mentioned in the preceding groups
    • B30B5/02—Presses characterised by the use of pressing means other than those mentioned in the preceding groups wherein the pressing means is in the form of a flexible element, e.g. diaphragm, urged by fluid pressure

Definitions

  • the present invention relates to a press with a very large working area for forming sheet-metal by means of a diaphragm which is pressed against pieces of sheet metal resting on a forming block. Aircraft parts such as ribs and the like can be manufactured in such a press.
  • the press comprises a press stand having a window opening with substantially rectangular cross-section.
  • a frame or plate is suspended in the press stand and in said frame or plate a diaphragm is attached forming a pressure bag.
  • On the underside of the diaphragm there is a thick layer of elastic material which forms a pad forming workpieces. workpieces are placed at the bottom of a troughshaped support member which is pushed into the operating space below the plate with the pressure bag and pad. after which the pressure bag is supplied with pressure medium. This will cause the pad to be pressed against one or more workpieces at the bottom of the trough-shaped support member.
  • an L-shaped strip is used which is attached in a resilient manner in the past of the support plate of the pressure bag which forms the end wall in the space where the pressure bag and its pad are arranged.
  • One flange of the L-shaped strip is directly attached by bolts in the end wall of the support plate and the elasticity is obtained by bending the flange.
  • By providing notches in the flange an increase in the length of the spring is achieved.
  • the forces which affect the strip in the pressing are great and sometimes cause the attachment bolts to burst after only a short time. It has also been difficult to make the resilient parts of the strip flange sufficiently rigid. These bolt and strip ruptures have caused prolonged shut-downs.
  • the strip is constructed and arranged in such a way that all forces affecting the strip in the axial directions of the press are transmitted to the wall which defines the space of the pressure bag, and the resilient attachment of the strip is such that the attachment bolts are only subjected to tensile forces.
  • the strip seal is made with a U-shaped portion with a flange projecting into a slot in said wall.
  • FIG. 1 shows a side view of a press plant
  • FIG. 2 shows a section on the line AA of FIG. I
  • FIG. 3 is a vertical longitudinal section on the line 3-8 of FIG. 2;
  • FIG. 4 shows on a larger scale a section through the strip seal and adjacent parts on the same line BB;
  • FIGS. 5 and 6 show the position of the strip sea] at two moments during a press operation.
  • I designates a press and 2 a trough shaped support member on which workpieces can be placed.
  • the support member is provided with transport rolls 3 running on tracks 4.
  • the support member is displaceable between the position shown in FIG. I, where pressed sheet-metal pieces are removed and new pieces are put on forms, and a position pushed into the press where the press pad forms the sheet-metal pieces.
  • the press shown is of the kind having a press stand which is constructed of an upper yoke I0, a lower yoke II and two intermediate spaces 12 which are kept together by a pre-stressed strip sheath I3. This sheath is surrounded by a protective plate 14.
  • the press rests on a support I5 having bearing plate beds adjusted to the press.
  • the yokes and spaces form a rectangular window opening in the press.
  • a plate 16 is mounted in the yoke 10 by means of bolts now shown.
  • a diaphragm I7 is attached with the help of the plate 18 and the bolts I9 so that a pressure bag is formed.
  • the space between the diaphragm I7 and the plate I8 communicates with a pressure source (not shown] through pipes 29 by way of valves and pipes (not shown).
  • the diaphragm is connected to a thick pad 20 of elastic material.
  • a support strip 2I Adjacent the recess where the diaphragm and pad are arranged there is a support strip 2I which is intended to prevent the pad 20 from being pressed out through the gap 22 between the plate I6 and the upper surface of the trough-shaped support member 2 during a press operation when the pad is pressed against the plate 23 on the forming block 24 in the recess 25 in the support member 2 by the press me dium in the pressure bag formed of the diaphragm I7 and the plate 18.
  • the wheels 3 of the support member 2 are mounted on axle pins 26 between the brackets 27.
  • the strip seal 21, a part of which overlaps the edge of the pad 20, is E-shaped and is provided with a web 210, a flange 21b. a flange 21c and a flange 21d.
  • the pad 20 has a shape adapted to the shape of the strip seal 21, with a part 200 projecting between the flanges 21c and 21d.
  • the flange 21b projects into this slotv
  • the flange 21c rests against the vertical. inner surface 36 of the wall 16a.
  • the strip seal 21 is suspended from the wall 16a with the help of a bolt 40 and a pres sure spring 41 and said sleeve 39.
  • a bolt 40 and a pres sure spring 41 and said sleeve 39 When pushing in and pulling out the trough-shaped support member 2, the pad 20 and the strip are in the position shown in FIGS.
  • Hydraulic press for forming sheet material
  • a press stand including a first part having a re cess therein and having walls at each end of the recess with transverse faces an expansible pressure bag and a pad of elastic material within the recess.
  • said press stand including a second part opposite the first part and spaced therefrom to provide an operating space extending through the press stand having end openings, a support member for tools and workpieces insertable into said operating space having transverse faces opposable to the transverse faces of the first part, grooves in said transverse faces substantially parallel to the plane of the end openings, metalli strip seals adjacent the end openings of the operating space overlying the edges of the pad end having flanges engaging in the grooves and having portions between the transverse faces of the first part and the transverse faces of the support member, said portions overlying the transverse faces of the support part and means mounting the strip seals on the first part 2.
  • the mounting means mount the strip seals for movement towards and away from the transverse faces of
  • the mounting means comprises hatshaped sleeves which are attached by their lower parts in the strip seals and which project into said notches, pressure springs in said sleeves and bolts attached in the transverse faces engaging said springs.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Physics & Mathematics (AREA)
  • Fluid Mechanics (AREA)
  • Press Drives And Press Lines (AREA)
US407506A 1972-11-14 1973-10-18 Hydraulic press Expired - Lifetime US3875778A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
SE14747/72A SE368173B (fr) 1972-11-14 1972-11-14

Publications (1)

Publication Number Publication Date
US3875778A true US3875778A (en) 1975-04-08

Family

ID=20299593

Family Applications (1)

Application Number Title Priority Date Filing Date
US407506A Expired - Lifetime US3875778A (en) 1972-11-14 1973-10-18 Hydraulic press

Country Status (3)

Country Link
US (1) US3875778A (fr)
JP (1) JPS49135278A (fr)
SE (1) SE368173B (fr)

Cited By (16)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2321941A1 (fr) * 1975-08-26 1977-03-25 Engelhard Min & Chem Systeme catalytique apte a fonctionner sous des conditions de temperature elevees
FR2354159A1 (fr) * 1976-06-09 1978-01-06 Asea Ab Presse hydraulique
US4079613A (en) * 1975-06-24 1978-03-21 Allmanna Svenska Elektriska Aktiebolaget Press with expansible pressure cell and forming pad
US4100783A (en) * 1977-02-14 1978-07-18 Vitaly Stepanovich Gambarov Installation for explosion machining of articles
US4188811A (en) * 1978-07-26 1980-02-19 Chem-Tronics, Inc. Metal forming methods
FR2462262A1 (fr) * 1979-07-31 1981-02-13 Bretagne Atel Chantiers Presse a emboutir
US4573335A (en) * 1984-01-20 1986-03-04 Asea Aktiebolag Hydraulic press with pressure cell
EP0190681A2 (fr) * 1985-02-06 1986-08-13 Asea Ab Presse de formage du type à cellule de compression
EP0198463A2 (fr) * 1985-04-18 1986-10-22 Asea Ab Presse à mouler du type à chambre de compression
US5261264A (en) * 1991-06-11 1993-11-16 The Boeing Company Automated forming station
EP0960717A2 (fr) * 1998-05-28 1999-12-01 Emme 2 S.r.l. Platine pour hydroformage
US6354125B1 (en) * 1998-05-11 2002-03-12 Automation, Press And Tooling Ap&T Ab Apparatus and method for hydroforming workpieces
US20040050263A1 (en) * 2000-11-28 2004-03-18 Keijo Hellgren Press plant and a method and use for it with a pressure cell and a divisible tray
US20040055480A1 (en) * 2000-11-28 2004-03-25 Keijo Hellgren Diaphragm support and a method for initial sealing in a pressure cell
US20040065138A1 (en) * 2000-11-28 2004-04-08 Keijo Hellgren Hydraulic press with pressure cell with a tray whic consists of prestressed lamellas
US20060230807A1 (en) * 2005-04-14 2006-10-19 Shultz Stephen W Creep forming a work piece

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5910994U (ja) * 1982-07-15 1984-01-24 油研工業株式会社 ラバ−パツドフオ−ミングプレスの圧力パツド流出防止構造
KR100334027B1 (ko) * 1993-11-04 2002-10-11 니기소 가부시키가이샤 가압성형장치및가압성형방법

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2696184A (en) * 1951-05-16 1954-12-07 Pastushin Aviat Corp Apparatus for forming hollow bodies
US2771850A (en) * 1952-03-11 1956-11-27 Douglas Aircraft Co Inc High-pressure hydraulic press
US3545241A (en) * 1968-04-22 1970-12-08 Verson Allsteel Press Co Hydraulic press

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2696184A (en) * 1951-05-16 1954-12-07 Pastushin Aviat Corp Apparatus for forming hollow bodies
US2771850A (en) * 1952-03-11 1956-11-27 Douglas Aircraft Co Inc High-pressure hydraulic press
US3545241A (en) * 1968-04-22 1970-12-08 Verson Allsteel Press Co Hydraulic press

Cited By (24)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4079613A (en) * 1975-06-24 1978-03-21 Allmanna Svenska Elektriska Aktiebolaget Press with expansible pressure cell and forming pad
FR2321941A1 (fr) * 1975-08-26 1977-03-25 Engelhard Min & Chem Systeme catalytique apte a fonctionner sous des conditions de temperature elevees
FR2354159A1 (fr) * 1976-06-09 1978-01-06 Asea Ab Presse hydraulique
US4100783A (en) * 1977-02-14 1978-07-18 Vitaly Stepanovich Gambarov Installation for explosion machining of articles
US4188811A (en) * 1978-07-26 1980-02-19 Chem-Tronics, Inc. Metal forming methods
FR2462262A1 (fr) * 1979-07-31 1981-02-13 Bretagne Atel Chantiers Presse a emboutir
US4573335A (en) * 1984-01-20 1986-03-04 Asea Aktiebolag Hydraulic press with pressure cell
EP0190681A2 (fr) * 1985-02-06 1986-08-13 Asea Ab Presse de formage du type à cellule de compression
EP0190681A3 (en) * 1985-02-06 1988-08-31 Asea Ab Forming press of the pressure cell type
EP0198463A2 (fr) * 1985-04-18 1986-10-22 Asea Ab Presse à mouler du type à chambre de compression
EP0198463A3 (en) * 1985-04-18 1987-04-15 Asea Ab Forming press of the pressure cell type
US4676086A (en) * 1985-04-18 1987-06-30 Asea Aktiebolag Press of pressure cell type
US5261264A (en) * 1991-06-11 1993-11-16 The Boeing Company Automated forming station
US6354125B1 (en) * 1998-05-11 2002-03-12 Automation, Press And Tooling Ap&T Ab Apparatus and method for hydroforming workpieces
EP0960717A2 (fr) * 1998-05-28 1999-12-01 Emme 2 S.r.l. Platine pour hydroformage
EP0960717A3 (fr) * 1998-05-28 2001-05-09 Emme 2 S.r.l. Platine pour hydroformage
US20040050263A1 (en) * 2000-11-28 2004-03-18 Keijo Hellgren Press plant and a method and use for it with a pressure cell and a divisible tray
US20040055480A1 (en) * 2000-11-28 2004-03-25 Keijo Hellgren Diaphragm support and a method for initial sealing in a pressure cell
US20040065138A1 (en) * 2000-11-28 2004-04-08 Keijo Hellgren Hydraulic press with pressure cell with a tray whic consists of prestressed lamellas
US20060191306A1 (en) * 2000-11-28 2006-08-31 Keijo Hellgren Diaphragm device
US7127925B2 (en) 2000-11-28 2006-10-31 Avure Technologies Ab Diaphragm support and a method for initial sealing in a pressure cell
US7320211B2 (en) 2000-11-28 2008-01-22 Flow Holdings Gmbh (Sagl) Limited Liability Company Method of exchanging a diaphragm device
US7461531B2 (en) * 2000-11-28 2008-12-09 Avure Technologies Ab Press plant and a method and use for it with a pressure cell and a divisible tray
US20060230807A1 (en) * 2005-04-14 2006-10-19 Shultz Stephen W Creep forming a work piece

Also Published As

Publication number Publication date
JPS49135278A (fr) 1974-12-26
SE368173B (fr) 1974-06-24

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