EP0165133A1 - Verfahren und Vorrichtung zum Formstanzen einer Metallplatte - Google Patents

Verfahren und Vorrichtung zum Formstanzen einer Metallplatte Download PDF

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Publication number
EP0165133A1
EP0165133A1 EP85400946A EP85400946A EP0165133A1 EP 0165133 A1 EP0165133 A1 EP 0165133A1 EP 85400946 A EP85400946 A EP 85400946A EP 85400946 A EP85400946 A EP 85400946A EP 0165133 A1 EP0165133 A1 EP 0165133A1
Authority
EP
European Patent Office
Prior art keywords
sheet
support
slide
central
active part
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.)
Granted
Application number
EP85400946A
Other languages
English (en)
French (fr)
Other versions
EP0165133B1 (de
Inventor
Gabriel De Smet
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.)
Sollac SA
Original Assignee
USINOR SA
Sollac SA
Union Siderurgique du Nord et de lEst de France SA USINOR
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 USINOR SA, Sollac SA, Union Siderurgique du Nord et de lEst de France SA USINOR filed Critical USINOR SA
Priority to AT85400946T priority Critical patent/ATE102510T1/de
Publication of EP0165133A1 publication Critical patent/EP0165133A1/de
Application granted granted Critical
Publication of EP0165133B1 publication Critical patent/EP0165133B1/de
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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Classifications

    • 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
    • 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

Definitions

  • the present invention relates to a method and a device for stamping sheets, in particular extra-thin steel sheets of large dimensions which can be used for example in the automobile industry, or comprising shapes having relatively closed dihedral angles.
  • the lower limit of the thicknesses is nevertheless limited by current stamping techniques, which do not allow the use, in the dimension of the body parts, of steel sheets whose thickness is less than 55/100 mm approximately, because of the tearing which appears in the areas subjected to stretching or of the creasing in the areas subjected to shrinking, of the sheet metal stamping.
  • the stamping of large parts is usually done by drawing with double effect presses, mechanical or hydraulic.
  • These devices essentially comprise a fixed matrix and two independent slides, a central slide, called a plunger carrying a punch, and an external slide reserved for hold-down operations, that is to say sufficient support allowing by reaction the stretching under the punch. Movements are generally as follows: (1) rapid descent of the blank holder which maintains constant pressure on the sheet and thus prevents it from moving; (2) rapid descent of the punch until it comes into contact with the sheet, then (3) slow descent of the punch during the stamping phase, under actual drawing; and ( 4 ) rapid ascent of the central slide causing the blank holder in its ascent.
  • this process does not prevent the formation of folds, the pressure gradients generated by the deformation of the elastomer decreasing as we approach the upper surface of the elastomer mass, especially for the production of angular shapes, the sheet being insufficiently held at its periphery due to the work on a single-effect press.
  • the object of the invention is therefore to provide a technology for stamping metal sheets having angular volumes and in particular extra thin steel sheets (50/100 mm), in large series and under competitive economic conditions.
  • high elastic limit steel sheets HLE is meant steels for which E> 350 HPa.
  • the subject of the invention is therefore a process for stamping sheets of substantially constant thickness, on a double-acting press, according to which the sheet to be formed is placed on a support, a first slide is applied outside the blank holder on the peripheral part of the sheet, then a second central slide is applied to the central part of the sheet, characterized in that the peripheral part of this sheet is formed, by letting it slide under the blank holder, using 'at least one active part of the outer slide so as to compensate in certain areas of the finished part for the excess surfaces, with unchanged thickness of the starting sheet, with respect to. volume to be formed and simultaneously and coincidentally, the central slide is moved to conform the angular volumes of the central part of the sheet by applying the sheet against the surfaces of the central part of the support forming the matrix.
  • an elastic material is chosen as the support material and during the action of the external slide on the sheet so as to compensate ser, always at substantially constant thickness, in certain areas of the finished part the surfaces in excess with respect to the volume to be formed, the mass of the support is caused to creep in order to deform the central part of the sheet so as to give it a substantially surface equal to the surface of the finished part to be obtained, then the central slide is moved to conform the angular volumes and the central part of the sheet by final creep of the support.
  • the invention is based on the principle of the equality of the surfaces of the initial flat sheet metal blank and the shaped blank strictly corresponds to the shape of the stamped part desired, increased by the excess peripheral surfaces shaped under blank holder, thus conditioning the maintaining a substantially constant thickness of the sheet of equal stress which will be explained below.
  • the elastic material is located in at least one peripheral zone of the support corresponding to at least the active part of the external slide and extending in at least one zone immediately adjacent to the central slide.
  • the support material has a shore hardness preferably between 70 and 100.
  • the invention also relates to a stamping device of the type comprising a support on which the sheet metal to be formed is placed, a first external slide or blank holder and a second central slide, characterized in that the first external slide comprises a active part in relief whose shape corresponds to the excess surface of the sheet with a thickness substantially constant with respect to the volume to be formed, this active part acting on the peripheral part of the sheet simultaneously and in relation to the action of the central slide.
  • the active part in relief of the external slide is carried by a movable element in translation independent of the external slide, which cooperates with a complementary shape provided in the support.
  • the support comprises a mass of elastic material occupying the entire surface corresponding to the outer slide and to the central slide.
  • the elastic support material is preferably easily flowable, for example an elastomer having a shore A hardness of less than 30 and preferably greater than 10, but which can be less than 10 to minimize the energy necessary for its deformation and dissipated in heat form. .
  • the elastic support material is located in a peripheral zone corresponding to the active part of the external slide. laughing and extending in an area immediately adjacent to the part of the central slide.
  • the support material has a shore hardness preferably between 70 and 100.
  • the device of FIG. 1 in position before forming comprises the usual constituent elements of a double-acting press, and therefore only the part relating to the invention is shown.
  • An external slider or blank holder 1 carrying a peripheral part 10 and a central slider 2 forming a punch are in the high position, while the sheet blank 7 to be formed is placed on a support 4 forming a matrix.
  • the peripheral part 10 comprises in its corners active parts in relief 11 carried by elements or candles 30 movable in translation in corresponding housings formed in the blank holder 1.
  • the active parts in relief 11 have an appropriate shape which corresponds to the surface excess in relation to the volume to be formed of the part which it is desired to produce, for example as illustrated in FIG. 11.
  • the support 4 made of a hard material, for example metallic, forms the matrix and includes a peripheral part 31 in which recessed parts 32 are formed corresponding to the complementary shape of the active parts in relief 11 of the candles 30.
  • the central part 33 of the support 4 constitutes the bottom of the matrix and has the shape of the finished part in its central zone.
  • the peripheral part 10 of the outer slide 1 has on its outer edges shims 34 which bear on the peripheral part 31 of the support 4 so as to allow, although the blank of t8le 7 is maintained, the displacement by sliding of the excess material in the cooperating parts 11, 32.
  • the step in FIG. 1 constitutes the step of placing the sheet blank 7, the external slide of the blank holder 1 being raised as well as the mobile elements 30 and the central slide 2.
  • Fig. 2 represents the step of bringing the blank holder into contact with the plate 7, by lowering the outer slider 1 and the punch 2. During this step, the mobile elements 30 do not move and retract into the clamp blank relative to their initial projecting position, so that the sheet is not biased by any deformation and only undergoes the tightening operation controlled at its periphery by the blank holder.
  • Fig. 3 illustrates a stage of active shaping of the part, in which there is a simultaneous descent and in relation to one another of the mobile elements 30 and of the punch 2 so as to gradually absorb the excess surface in certain areas of the part to be formed thanks to the active part 11 and its complementary part 32, while maintaining there sheet metal stretched over the punch by controlled sliding under the blank holder.
  • the active part of the punch has reached the bottom of the die 33 and the movable elements 30 also have their active parts 11 which cooperate with the complementary parts 32 by enclosing the sheet 7 and thus having absorbed the excess surfaces of sheet relative to to the volume of the finished part to be formed, thus avoiding the formation of folds, shrinking or thinning at any point whatever the thickness of the sheet.
  • the device shown in Figs. 5 to 9 illustrates a second variant of the method and the device according to the present invention in which the simultaneous and coordinated relative movement of the active parts in relief 11 of the peripheral slide 1 and of the central slide 2 is obtained.
  • the device of FIG. 5 in the position before forming comprises the usual constituent elements of a double-acting press which have already been described and bear the same references as above.
  • the outer slider or blank holder 1 carries a peripheral part 10 forming a matrix which has in its angles an appropriate relief shape 11 formed integrally with the peripheral matrix 10 (this relief shape 11 corresponds to the surface area in excess of the volume to be form the part that you want to make, for example as illustrated in Fig. 11) and its active surface is carefully polished to allow the movement of excess material during forming; this active surface can also be treated to facilitate the sliding of the material.
  • the central slide 2 carries a bottom of matrix 2a and is in the raised position, while the sheet metal blank 7 to be formed is placed in the center of a support 4 disposed in a container 3 (tray).
  • a reversal of roles should be noted.
  • satrise-poincon which appears in the description below of this embodiment. Indeed, the support made of an easily flowable elastic material plays the role of punch by deformation.
  • the support 4 consists of an elastomer having a shore hardness less than 30 and preferably greater than 10, a very important characteristic residing in the rapid return time of the material (preferably less than 1 second) to its initial shape.
  • a natural rubber foam having a shore hardness of about 15 and having a very short deformation time of the order of 1 s.
  • other conventional gels or foams preferably having great plasticity, for example silicone elastomers, or cellular foams, the cells of which can be filled with liquid.
  • Retractable members 5 inflatable candles or bladders protrude into the elastomer serving as support 4, and their inserted volume represents approximately the expansion volume of the elastomer after forming.
  • the support 4 is covered with a sheet of plastic material 8, for example of "Teflon", interposed between the t8le 7 and the elastomer, which can be optionally glued or welded to the elastomer and which has the main purpose of facilitating the sliding of the sheet during forming, but it can also be used to protect the elastomer as indicated in the previous composite structure.
  • a sheet of plastic material 8 for example of "Teflon”
  • the support 4 includes conduits 6 allowing the circulation of a cooling fluid such as compressed air.
  • a cooling fluid such as compressed air.
  • Fig. 6 represents the step of pre-forming the part.
  • the blank-holding slide 1 is lowered carrying the peripheral matrix 10.
  • the latter comes into contact with the sheet blank 7 which reacts by compressing the elastomer support 4.
  • the elastomer under the effect of this action of peripheral compression acts by creep on the central zone of the sheet blank and causes its deformation.
  • the swelling of the central part of the sheet blank is limited by the bottom of the matrix 2a fixed to the central slide 2 in order to avoid uncontrolled erratic deformations due to the anisotropy of the metal or to forms of asymmetrical parts.
  • the descent of the blank holder slide 1 carrying the peripheral matrix 10 is limited by adjustable mechanical stops 12, 16 so that the deformation in its central part of the sheet blank gives a surface which is substantially equal to that of the finished part to be obtained.
  • Fig. 7 represents the final shaping stage of the part.
  • the central slide 2 carrying the bottom of the die 2a descends to its low position and causes the final forming of the central part of the sheet 7, preformed during the previous operation.
  • Fig. 8 represents the step of decompression of the elastomer support 4 by withdrawal of the candles 5. This operation aims to avoid the deformation of the stamped part by expansion reaction of the elastomer.
  • Fig. 9 represents the step of releasing the formed part 7, by simultaneous ascent of the two slides 1 and 2 carrying the dies.
  • compressed air is circulated in the conduits 6.
  • the cooling of the support 4 can also be performed during the previous decompression step (Fig. 8).
  • compressed air is sent through the conduits 9 to allow the part 7 to take off.
  • the outer slider or blank holder 1 is of the type illustrated by the first variant, namely, it has active parts in relief 11 carried by elements movable in translation in housings formed in the blank holder 1.
  • the mobile elements 30 descend simultaneously and in relation to the movement of the punch so as to obtain the same effect as that described for the first variant .
  • Two sectional views along lines 12 and 13 show that the excess surfaces of material, during the forming of the corner 13, have been displaced towards the base 13a of the corner of the part in a manner corresponding to the relief shapes. 11 of the peripheral matrix 10. Thereafter an operation of trimming the part makes it possible to eliminate the undesirable edges 15 and to give it its final shape.
  • this square 50 exists and represents excess material.
  • the aim of the present invention is to avoid the formation of any excess thickness or thinning which would risk generating folds or tears, in particular in ultra-thin sheets having in particular deep angular volumes.
  • the stamping die has at each of its angles a suitable shape in relief 11 which will form in hollow at the base of each of the angles of the part to obtain a progressive concave shape of surface equivalent to the excess of material for example, the square 50 mentioned in the previous paragraph (forming a rectangular parallelepiped).
  • the device according to the invention is adaptable to existing double-acting presses.
  • the invention may prove to be particularly useful for the production of ultra-thin sheet steel of automobile body parts, of aircraft fuselage, etc .; but it can also be applied to the stamping of thicker sheets of various metals.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Physics & Mathematics (AREA)
  • Fluid Mechanics (AREA)
  • Shaping Metal By Deep-Drawing, Or The Like (AREA)
  • Press Drives And Press Lines (AREA)
  • Paper (AREA)
  • Mounting, Exchange, And Manufacturing Of Dies (AREA)
  • Auxiliary Devices For And Details Of Packaging Control (AREA)
  • Crucibles And Fluidized-Bed Furnaces (AREA)
  • Dry Formation Of Fiberboard And The Like (AREA)
  • Diaphragms For Electromechanical Transducers (AREA)
  • Control Of Presses (AREA)
  • Casting Or Compression Moulding Of Plastics Or The Like (AREA)
  • Perforating, Stamping-Out Or Severing By Means Other Than Cutting (AREA)
  • Manufacturing Of Electric Cables (AREA)
  • Supplying Of Containers To The Packaging Station (AREA)
  • Facsimile Transmission Control (AREA)
EP85400946A 1984-05-17 1985-05-14 Verfahren und Vorrichtung zum Formstanzen einer Metallplatte Expired - Lifetime EP0165133B1 (de)

Priority Applications (1)

Application Number Priority Date Filing Date Title
AT85400946T ATE102510T1 (de) 1984-05-17 1985-05-14 Verfahren und vorrichtung zum formstanzen einer metallplatte.

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FR8407678 1984-05-17
FR8407678A FR2564339B1 (fr) 1984-05-17 1984-05-17 Procede et dispositif d'emboutissage de toles.

Related Child Applications (1)

Application Number Title Priority Date Filing Date
EP87104914.4 Division-Into 1985-05-14

Publications (2)

Publication Number Publication Date
EP0165133A1 true EP0165133A1 (de) 1985-12-18
EP0165133B1 EP0165133B1 (de) 1994-03-09

Family

ID=9304091

Family Applications (2)

Application Number Title Priority Date Filing Date
EP87104914A Expired - Lifetime EP0238099B1 (de) 1984-05-17 1985-05-14 Verfahren und Vorrichtung zum Formstanzen einer Metallplatte
EP85400946A Expired - Lifetime EP0165133B1 (de) 1984-05-17 1985-05-14 Verfahren und Vorrichtung zum Formstanzen einer Metallplatte

Family Applications Before (1)

Application Number Title Priority Date Filing Date
EP87104914A Expired - Lifetime EP0238099B1 (de) 1984-05-17 1985-05-14 Verfahren und Vorrichtung zum Formstanzen einer Metallplatte

Country Status (13)

Country Link
US (1) US4833903A (de)
EP (2) EP0238099B1 (de)
JP (2) JPS6138721A (de)
KR (1) KR930004864B1 (de)
AT (2) ATE102510T1 (de)
AU (1) AU581659B2 (de)
BR (2) BR8502328A (de)
CA (1) CA1296581C (de)
DE (2) DE3584291D1 (de)
ES (2) ES8701546A1 (de)
FR (1) FR2564339B1 (de)
MX (1) MX163280B (de)
ZA (1) ZA853618B (de)

Cited By (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0231677A1 (de) * 1985-12-04 1987-08-12 Sollac Verfahren und Vorrichtung zum Formstanzen von Metallplatten mit geringer Ausdehnung
GB2208619A (en) * 1987-08-15 1989-04-12 Austin Rover Group A sheet metal forming tool and methods of making and using same
GB2240060A (en) * 1990-01-18 1991-07-24 Nam Lee Ind Method of producing main frame for a shipping container
EP0572301A1 (de) * 1992-05-27 1993-12-01 Isoform Tiefziehvorrichtung zum Ziehen von blattförmigem Material in einer elastischen Verformungsmatrize
US5406823A (en) * 1991-01-18 1995-04-18 Nam Lee Industries (Pte) Ltd. Method of producing a main frame for a shipping container
EP0664168A1 (de) * 1994-01-21 1995-07-26 Sollac S.A. Vorrichtung zum Tiefziehen eines Blechzuschnittes
CN104607528A (zh) * 2013-11-05 2015-05-13 王正平 沟槽型精密下料装置

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FR2641217B1 (fr) * 1988-12-30 1994-04-01 Isoform Procede et dispositif d'emboutissage de materiaux en feuille sur une matrice de formage elastique
FR2641216B1 (fr) * 1988-12-30 1994-04-01 Isoform Procede et dispositif d'emboutissage de materiaux en feuille avec poincon deformable sous plongeur
FR2641215A1 (fr) * 1988-12-30 1990-07-06 Isoform Dispositif d'emboutissage de materiaux en feuilles
US5353618A (en) 1989-08-24 1994-10-11 Armco Steel Company, L.P. Apparatus and method for forming a tubular frame member
JP2815417B2 (ja) * 1989-09-27 1998-10-27 富士重工業株式会社 プレス型
US5157969A (en) * 1989-11-29 1992-10-27 Armco Steel Co., L.P. Apparatus and method for hydroforming sheet metal
US5148696A (en) * 1990-07-25 1992-09-22 Spectta Products Corporation Metal forming and drawing process and apparatus
BE1004564A3 (fr) * 1990-08-30 1992-12-15 Cockerill Rech & Dev Dispositif de regulation de la force de serre-flan dans une presse.
FR2670408A1 (fr) * 1990-12-18 1992-06-19 Isoform Dispositif d'emboutissage de materiaux en feuille notamment de flans de tole.
FR2683168B1 (fr) * 1991-11-04 1994-03-04 Isoform Dispositif d'emboutissage de materiaux en feuille, notamment de flans de tole.
US5315858A (en) * 1992-11-20 1994-05-31 Crown Cork & Seal Company, Inc. Methods and apparatus for redrawing thin-walled container bodies
US5505071A (en) * 1994-05-06 1996-04-09 Owens-Corning Fiberglas Technology, Inc. Apparatus and method for retention of thin foils during forming
DE19939504A1 (de) * 1999-08-20 2001-03-08 Konrad Schnupp Verfahren zur Betätigung einer Umformpresse
US6196043B1 (en) 1999-08-27 2001-03-06 General Motors Corporation Double vee lockbead for sheet metal forming
DE20021924U1 (de) * 2000-12-21 2001-05-10 Reinecke Frank CD-Verpackung (Karte)
DE102004022666B4 (de) * 2003-05-28 2023-03-16 Schaeffler Technologies AG & Co. KG Stanzverfahren
DE102007008117B8 (de) * 2007-02-19 2009-04-23 Voestalpine Anarbeitung Gmbh Verfahren und Vorrichtung zum temperierten Umformen von warmgewalztem Stahlmaterial
US20090158580A1 (en) * 2007-06-18 2009-06-25 Precision Valve Corporation Method of making aerosol valve mounting cups and resultant cups
US8118197B2 (en) * 2007-06-18 2012-02-21 Precision Valve Corporation Method of making aerosol valve mounting cups and resultant cups
EA012124B1 (ru) * 2007-08-07 2009-08-28 Общество С Дополнительной Ответственностью "Кузовные Детали" Способ формообразования изделий из листового материала и приспособление для его осуществления
JP4386130B2 (ja) * 2007-11-30 2009-12-16 トヨタ自動車株式会社 プレス装置用金型および開放絞り成形方法
US8556618B2 (en) * 2011-04-07 2013-10-15 Spirit Aerosystems, Inc. Method and bladder apparatus for forming composite parts
DE102012101853A1 (de) 2012-03-06 2013-09-12 Dr. Ing. H.C. F. Porsche Aktiengesellschaft Verfahren zur Herstellung eines Blechteils sowie Umformvorrichtung und Blechteil mit einem umgeformten Randbereich
FR2991203B1 (fr) * 2012-06-01 2015-06-26 Peugeot Citroen Automobiles Sa Presse d'emboutissage de pieces en tole dont le presseur comporte des elements en elastomere.
FR3005880B1 (fr) * 2013-05-22 2015-05-29 Peugeot Citroen Automobiles Sa Procede d'emboutissage d'une piece, notamment de carrosserie de vehicule automobile, a prise de pince amelioree
JP2016198791A (ja) * 2015-04-09 2016-12-01 株式会社デンソー プレス加工方法、プレス加工装置、プレス成形体、プレス加工品
TWI599476B (zh) * 2015-06-16 2017-09-21 National Kaohsiung First Univ Of Science And Technology Molding mold with rubber pressure plate
CN105215192A (zh) * 2015-11-06 2016-01-06 北京动力机械研究所 一种薄壁深抛物线形拉伸件单模成形装置及方法
CN112775271B (zh) * 2020-12-24 2023-05-23 中航贵州飞机有限责任公司 一种钣金零件橡皮冲孔、制槽的工艺方法
CN113560827B (zh) * 2021-08-17 2022-09-20 浙江盛林汽车部件有限公司 一种汽车底盘用套管的拉伸成型工艺

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US1468692A (en) * 1921-04-25 1923-09-25 Wickes Boiler Company Method of making boiler headers
FR764488A (fr) * 1933-02-09 1934-05-22 Procédé de travail de matières en feuilles
FR756767A (fr) * 1933-06-10 1933-12-15 Budd Edward G Mfg Co Procédé et appareil pour l'emboutissage de grands objets métalliques de forme irrégulière
US2533528A (en) * 1948-04-01 1950-12-12 Beckwith Mfg Co Process of making steel toe boxes
US2666951A (en) * 1951-08-30 1954-01-26 Us Rubber Co Method and apparatus for drawing plastic sheets
US2749867A (en) * 1952-12-03 1956-06-12 John H Engel Controlled pressure metal forming apparatus
US2859719A (en) * 1953-08-17 1958-11-11 Northrop Aircraft Inc Combined resilient press pad and expandable bladder
FR1213857A (fr) * 1958-10-29 1960-04-05 Cie Des Forges De Chatillon Procédé pour l'emboutissage à froid des métaux
DE1929765A1 (de) * 1969-06-12 1970-12-23 Julius Caspers Press Stanz Und Verfahren zur Herstellung einteiliger Blechpressteile

Cited By (13)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0231677A1 (de) * 1985-12-04 1987-08-12 Sollac Verfahren und Vorrichtung zum Formstanzen von Metallplatten mit geringer Ausdehnung
GB2208619B (en) * 1987-08-15 1991-11-13 Austin Rover Group A sheet metal drawing tool and methods of making and using same.
GB2208619A (en) * 1987-08-15 1989-04-12 Austin Rover Group A sheet metal forming tool and methods of making and using same
GB2240060B (en) * 1990-01-18 1994-03-16 Nam Lee Ind Method of producing a main frame for a shipping container
GB2240060A (en) * 1990-01-18 1991-07-24 Nam Lee Ind Method of producing main frame for a shipping container
US5406823A (en) * 1991-01-18 1995-04-18 Nam Lee Industries (Pte) Ltd. Method of producing a main frame for a shipping container
EP0572301A1 (de) * 1992-05-27 1993-12-01 Isoform Tiefziehvorrichtung zum Ziehen von blattförmigem Material in einer elastischen Verformungsmatrize
FR2691653A1 (fr) * 1992-05-27 1993-12-03 Isoform Dispositif d'emboutissage de matériaux en feuille sur une matrice de formage en matériau élastique.
US5361617A (en) * 1992-05-27 1994-11-08 Isoform Device for drawing sheet material on a drawing die composed of elastically yieldable material
EP0664168A1 (de) * 1994-01-21 1995-07-26 Sollac S.A. Vorrichtung zum Tiefziehen eines Blechzuschnittes
FR2715335A1 (fr) * 1994-01-21 1995-07-28 Lorraine Laminage Dispositif d'emboutissage d'un flan de tôle.
US5599565A (en) * 1994-01-21 1997-02-04 Sollac Device for press forming a sheet blank
CN104607528A (zh) * 2013-11-05 2015-05-13 王正平 沟槽型精密下料装置

Also Published As

Publication number Publication date
CA1296581C (en) 1992-03-03
ATE67941T1 (de) 1991-10-15
MX163280B (es) 1992-03-31
BR8502328A (pt) 1986-01-21
US4833903A (en) 1989-05-30
JPH0224610B2 (de) 1990-05-30
AU4260885A (en) 1985-11-21
FR2564339B1 (fr) 1987-12-24
EP0165133B1 (de) 1994-03-09
DE3587770D1 (de) 1994-04-14
KR850008115A (ko) 1985-12-13
DE3584291D1 (de) 1991-11-07
ES8704769A1 (es) 1987-05-01
JPH02165822A (ja) 1990-06-26
ZA853618B (en) 1985-12-24
AU581659B2 (en) 1989-03-02
BR8705581A (pt) 1990-05-01
EP0238099B1 (de) 1991-10-02
ES8701546A1 (es) 1986-12-16
FR2564339A1 (fr) 1985-11-22
ATE102510T1 (de) 1994-03-15
DE3587770T2 (de) 1994-10-27
JPS6138721A (ja) 1986-02-24
KR930004864B1 (ko) 1993-06-09
ES543907A0 (es) 1986-12-16
EP0238099A2 (de) 1987-09-23
EP0238099A3 (en) 1989-08-09
JPH0536133B2 (de) 1993-05-28
ES557038A0 (es) 1987-05-01

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