EP1181995A2 - Vorrichtung und Verfahren zum Umformen von Platinen aus flexibel gewalztem Metallband - Google Patents
Vorrichtung und Verfahren zum Umformen von Platinen aus flexibel gewalztem Metallband Download PDFInfo
- Publication number
- EP1181995A2 EP1181995A2 EP01118046A EP01118046A EP1181995A2 EP 1181995 A2 EP1181995 A2 EP 1181995A2 EP 01118046 A EP01118046 A EP 01118046A EP 01118046 A EP01118046 A EP 01118046A EP 1181995 A2 EP1181995 A2 EP 1181995A2
- Authority
- EP
- European Patent Office
- Prior art keywords
- forming
- thickness
- board
- blank
- flat
- 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
Links
- 238000000034 method Methods 0.000 title claims description 46
- 239000002184 metal Substances 0.000 title claims description 18
- 238000005096 rolling process Methods 0.000 title description 9
- 230000007704 transition Effects 0.000 claims description 73
- 238000007493 shaping process Methods 0.000 claims description 9
- 238000003825 pressing Methods 0.000 abstract description 4
- 230000009975 flexible effect Effects 0.000 description 11
- 239000011159 matrix material Substances 0.000 description 4
- 238000011161 development Methods 0.000 description 3
- 230000018109 developmental process Effects 0.000 description 3
- 230000000694 effects Effects 0.000 description 2
- 238000004519 manufacturing process Methods 0.000 description 2
- 238000000926 separation method Methods 0.000 description 2
- 230000002146 bilateral effect Effects 0.000 description 1
- 230000006835 compression Effects 0.000 description 1
- 238000007906 compression Methods 0.000 description 1
- 230000008030 elimination Effects 0.000 description 1
- 238000003379 elimination reaction Methods 0.000 description 1
- 230000003993 interaction Effects 0.000 description 1
- 239000011295 pitch Substances 0.000 description 1
- BASFCYQUMIYNBI-UHFFFAOYSA-N platinum Chemical compound [Pt] BASFCYQUMIYNBI-UHFFFAOYSA-N 0.000 description 1
- 238000003856 thermoforming Methods 0.000 description 1
Images
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
- B21D22/02—Stamping using rigid devices or tools
-
- 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
- B21D22/20—Deep-drawing
- B21D22/26—Deep-drawing for making peculiarly, e.g. irregularly, shaped articles
-
- 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
- B21D35/00—Combined processes according to or processes combined with methods covered by groups B21D1/00 - B21D31/00
- B21D35/002—Processes combined with methods covered by groups B21D1/00 - B21D31/00
- B21D35/005—Processes combined with methods covered by groups B21D1/00 - B21D31/00 characterized by the material of the blank or the workpiece
- B21D35/006—Blanks having varying thickness, e.g. tailored blanks
Definitions
- the invention relates to a device for forming blanks from flexible Rolled metal strip, with forming devices that are used for forming the board cooperate, the board having at least two of each other different thicknesses and the thickness profile of the board essentially runs symmetrically to the central plane of the board, i.e. the board has a thickness transition on both sides, and the thickness transitions one side of the board can be moved so that one side of the formed Circuit board has a thickness transition and the other side of the formed PCB is flat.
- the invention further relates to a method for forming of boards made of flexibly rolled metal strip, the board with at least there are two different thicknesses and the thickness profile the board essentially symmetrical to the center plane of the board runs, the board has a thickness transition on both sides, and the Thickness transitions are shifted to one side of the board, so that a Side of the formed plate has a thickness transition and the other Side of the formed circuit board is flat,
- the circuit board in question is a workpiece that through flexible rolling of a metal strip and subsequent separation of the metal strip has been made into boards.
- the flexible rolling as Process for the production of metal strips with defined along their length different strip thicknesses is well known from practice and therefore characterized in that the roll gap is specifically adjusted during the rolling process becomes.
- different lengths of tape sections with different Strip thicknesses rolled together over different pitches can be connected, the corresponding bilateral strip thickness transitions form.
- the goal of flexible rolling is to make rolled products with cross-sectional shapes that are optimized for load and weight.
- the process is usually designed as strip rolling from coil to coil.
- boards made from flexibly rolled metal strips point accordingly such a thickness profile that at least two of each other different thicknesses, the areas with the different from each other Thicknesses over a range having a predetermined slope, that is, a strip thickness transition, are interconnected.
- This Boards are generally used for the manufacture of components changing wall thicknesses used. It applies that the boards before their Further processing into components with changing wall thicknesses typically have a thickness profile that is symmetrical to the median plane of the Circuit boards is. However, the components to be made from these boards are intended often only have thickness transitions on one side. So that means e.g.
- the inventive device for forming blanks from flexible rolled metal strip in which the previously derived and shown task is initially and essentially characterized by that the forming surface of the forming device facing the circuit board side is a thickness transition in the deformed state of the board should have a shape adapted to the thickness transition to be achieved has, and the forming surface of the forming device, that of the board side facing, which should be flat in the deformed state of the board, is flat.
- the two sides of the manufactured by flexible rolling of a metal strip The board is thus changed during the forming process in such a way that the original thickness transitions present on both sides in the same work step as the deformation is shifted on one side. That means that with the reshaped Workpiece, i.e. the formed blank, only a change in thickness exists on one side while the other side is flat, this being Thickness transition is larger, namely is generally twice as large as in not yet deformed condition of the board.
- Thickness transition is larger, namely is generally twice as large as in not yet deformed condition of the board.
- the workpiece in one Thermoforming process has been formed into a deep-drawn part, of course, in such a way that the flat side of the formed workpiece does not change more entirely located in one level, but from the original one Side of the board protrudes corresponding level, since it is one Deep-drawn part is generally a three-dimensional structure.
- plane is the term "plan” as a contrast to the state to understand one side of the workpiece in which this side a Has thickness transition.
- the forming device is basically for all known forming processes usable, with the help of which sheets are formed. Is accordingly the invention also applies to all conventional types of forming devices applicable. According to a preferred development of the invention, however provided that the forming devices a stamp and a die comprise, which cooperate to form the workpiece.
- a stamp and a die comprise, which cooperate to form the workpiece.
- Such a Stamp and such a matrix act to reshape the Workpiece generally together such that a frame from the die is formed with an opening enclosed by the frame, wherein the workpiece to be formed, i.e. the flexibly rolled blank, on the Frame rests, so that with the stamp of the opening of the die lying area of the board by plastic deformation of the same in the Opening of the die can be pressed.
- Such a combination from a stamp and a die z. B. for the deep-drawing process used.
- the forming devices Basically are for the implementation of a forming process in question two forming devices, such as. B. a stamp and a Die, sufficient.
- the forming devices also have a Hold down hold-down and the hold-down one adapted to the thickness transition Has shape when it is provided on the side of the workpiece, which should have a thickness transition in the deformed state, and flat is, if it is provided on the side of the workpiece, that in the formed The condition of the workpiece should be flat.
- the hold-down device what for the other forming devices, e.g. B. the stamp and the matrix also applies, namely because of its either to be achieved Thickness transition adapted or plan during the shape Forming process a relocation of the originally existing on both sides Thickness transitions on one side is achieved.
- the hold-down device preferably on the side of the board corresponding to the stamp arranged so that the holding-down device for holding down the workpiece the matrix can work together. Specifically, this means that through the Interaction of the hold-down with the die between the workpiece the hold-down device and the die is clamped. That way especially with only slightly stiff workpieces ensured that when pressing the punch into the opening of the die the workpiece does not slide completely into the opening of the die.
- the shaping device or the shaping devices more precisely: the corresponding forming surface or the corresponding ones Forming surfaces facing the side of the workpiece or are a thickness transition in the deformed state of the workpiece should have a shape adapted to the thickness transition or have. Such a matched to the thickness transition to be achieved
- the shape of the forming surface of a forming device is generally then when the course of the forming surface of the forming device exactly the course of the surface of the formed workpiece to be achieved equivalent. This means that the surface of the formed workpiece receives exactly the shape given by the shape of the forming surface of the forming device is specified. Especially when there are compression effects or hysteresis effects can, however, at least from this rule slightly deviated.
- the forming surface of a forming device which faces the side of the workpiece is a sheet thickness transition in the deformed state of the workpiece should generally have that on the board Originally existing mutual thickness transitions by one Thickness d the forming surface of the forming device has a thickness transition of essentially a thickness of 2d.
- one of the devices described above is used preferably for a high pressure sheet metal forming process, a tensile forming process or a tensile pressure forming process, in particular for deep drawing, stretching or pressing.
- a device according to the invention is also for everyone other forming processes suitable with two cooperating forming devices work.
- the inventive method for forming blanks from flexible rolled metal strip in which the derived and shown above
- the problem is solved is initially and essentially characterized by that the thickness transitions in the process step to one side of the board be shifted, in which the forming of the board takes place.
- this is possible because the shift in thickness transitions on one side of the board and reshaping the board with the same Forming devices are carried out.
- Other preferred developments of the invention Procedures result in analogy to those previously described preferred embodiments of the invention Contraption.
- FIG. 1 is a perspective view through flexible rolling of a metal strip and subsequent separation of the board 1 obtained, the two different areas, namely one area 2 and a region 3, with different thicknesses.
- the Area 2 is from area 3 on both sides of the circuit board 1 by one Thickness transition 4 separated, the transition with a predetermined slope from the thickness of area 2 to the thickness of area 3.
- FIG. 2A A device for forming a circuit board according to FIG. 1 after a first preferred embodiment of the invention is schematic from Fig. 2A can be seen, with a longitudinal section above and a cross section shown below are.
- the devices shown in FIG. 2A as in the 3A apparent device, applies that only such components are shown are essential to the invention. That means that Components of the devices are not shown, in the same way in conventional devices for forming workpieces Sheet are provided.
- the device according to the first preferred embodiment of the invention has a stamp 5 and a die 6, between which the to be formed circuit board 1 is arranged.
- a hold-down 7 is also provided, with the help of which the board 1 can be fixed on the die 6. Through this fixation it is ensured that the board 1 is not complete during the forming process slips into the opening of the die 6.
- the circuit board 1 has two regions 2, 3 with one another different thicknesses, the thickness profile of the board 1 symmetrical to the central plane of the board 1.
- a component namely a deep-drawn part
- the die 6 formed such that its surface on which the board 1 during the forming process rests, ie the forming surface of the die 6, completely in one Level lies.
- the opening formed by the die 6 follows - apart from the rounded corners - essentially a rectangular shape.
- the forming surfaces of the punch 5 or the hold-down have 7 each have such a shape that the thickness transition to be achieved 4 of the board 1 are adapted. This means that the forming surface, the rests on the board 1 during the forming process, just not completely in one level. Instead, it is provided that the thickness of the hold-down 7 in the area that rests on the thinner area 3 of the circuit board 1, is thicker than in the other area, the thicker area 2 of the board 1 is assigned.
- a formed circuit board 1 can be seen, which with the 2A schematically illustrated device according to the first preferred Embodiment of the invention has been made.
- Out 2B that the outer surfaces of the formed circuit board 1 are complete are flat, while the inner surfaces of the formed circuit board 1 Have thickness transition 4, with a thicker area 2 of the board connects a thinner area 3 of the circuit board 1.
- FIG. 3A schematically shows a device according to a second preferred Embodiment of the invention can be seen with a reshaping a board 1 is possible in such a way that an external one Thickness transition 4 can be achieved and the inner surfaces of the deformed Circuit board are completely flat, as can be seen from Fig. 3B. Since now according to the second preferred embodiment of the invention in the Circuit board 1, thickness transitions 4 originally present on both sides should be shifted that only on the lower side of the board 1 Thickness transition 4 is present, it is provided that during the forming process on the circuit board 1 surface of the hold-down 7, that is Forming surface, as well as the surface of the Stamp 5, ie the forming surface of the stamp 5, each completely in one Level.
- the invention is in connection with the two preferred exemplary embodiments the invention has been explained using a deep-drawing process, this limits the use of the device according to the invention but not on such a method, so that the device according to the invention also for other forming processes, such as for high-pressure sheet metal forming processes or Switzerlandchristformform compiler, can be used.
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Shaping Metal By Deep-Drawing, Or The Like (AREA)
- Forging (AREA)
- Coating With Molten Metal (AREA)
- Metal Rolling (AREA)
Abstract
Description
- Fig. 1
- eine durch flexibles Walzen eines Metallbandes und anschliessendes Vereinzeln hergestellte Platine mit beidseitigen Dickenübergängen, in einer perspektivischen Ansicht,
- Fig. 2A
- schematisch, die wesentlichen Bauteile einer Vorrichtung zum Herstellen eines Tiefziehteils mit innen liegendem Dickenübergang gemäß einem ersten bevorzugten Ausführungsbeispiel der Erfindung, einerseits im Längsschnitt, andererseits im Querschnitt,
- Fig. 2B
- ein mit der schematisch aus Fig. 2A ersichtlichen Vorrichtung hergestelltes Tiefziehteil mit innen liegendem Dickenübergang,
- Fig. 3A
- schematisch, die wesentlichen Bauteile einer Vorrichtung zur Herstellung eines Tiefziehteils mit außen liegendem Dickenübergang gemäß einem zweiten bevorzugten Ausführungsbeispiel der Erfindung, einerseits im Längsschnitt, andererseits im Querschnitt, und
- Fig. 3B
- ein mit der schematisch aus Fig. 3A ersichtlichen Vorrichtung hergestelltes Tiefziehteil mit außen liegendem Dickenübergang.
Claims (11)
- Vorrichtung zum Umformen von Platinen aus flexibel gewalztem Metallband, mit Umformeinrichtungen, die zum Umformen der Platine zusammenwirken, wobei die Platine (1) mit wenigstens zwei voneinander verschiedenen Dicken vorliegt und das Dickenprofil der Platine (1) im wesentlichen symmetrisch zur Mittelebene der Platine (1) verläuft, die Platine (1) also beidseitig einen Dickenübergang (4) aufweist, und die Dickenübergänge (4) auf eine Seite der Platine (1) verlagerbar sind, so daß eine Seite der umgeformten Platine (1) einen Dickenübergang (4) aufweist und die andere Seite der umgeformten Platine (1) plan ist, dadurch gekennzeichnet, daß die Umformfläche der Umformeinrichtung, die der Platinenseite zugewandt ist, die im umgeformten Zustand der Platine (1) einen Dickenübergang (4) aufweisen soll, eine an den zu erzielenden Dickenübergang (4) angepaßte Form aufweist, und die Umformfläche der Umformeinrichtung, die der Platinenseite zugewandt ist, die im umgeformten Zustand der Platine (1) plan sein soll, plan ist.
- Vorrichtung nach Anspruch 1, dadurch gekennzeichnet, daß die Umformeinrichtungen einen Stempel (5) und eine Matrize (6) umfassen, die zum Umformen der Platine (1) zusammenwirken.
- Vorrichtung nach Anspruch 1 oder 2, dadurch gekennzeichnet, daß die Umformeinrichtungen einen Niederhalter (7) umfassen und der Niederhalter (7) eine an den Dickenübergang (4) angepaßte Form aufweist, wenn er auf der Platinenseite vorgesehen ist, die im umgeformten Zustand der Platine (1) einen Dickenübergang (4) aufweisen soll, und plan ist, wenn er auf der Platinenseite vorgesehen ist, die im umgeformten Zustand der Platine (1) plan sein soll.
- Vorrichtung nach Anspruch 2 und 3, dadurch gekennzeichnet, daß der Niederhalter (7) auf der dem Stempel (5) entsprechenden Seite der Platine (1) vorgesehen ist und zum Niederhalten der Platine (1) mit der Matrize (6) zusammenwirkt.
- Verwendung einer Vorrichtung nach einem der Ansprüche 1 bis 4 für ein Hochdruckblechumformverfahren, ein Zugumformverfahren oder ein Zugdruckumformverfahren, insbesondere nämlich für ein Tiefziehen, ein Streckziehen oder ein Drücken.
- Verfahren zum Umformen von Platinen aus flexibel gewalztem Metallband, wobei die Platine mit wenigstens zwei voneinander verschiedenen Dicken vorliegt und das Dickenprofil der Platine im wesentlichen symmetrisch zur Mittelebene der Platine verläuft, die Platine also beidseitig einen Dickenübergang aufweist, und die Dickenübergänge auf eine Seite der Platine verlagert werden, so daß eine Seite der umgeformten Platine einen Dickenübergang aufweist und die andere Seite der umgeformten Platine plan ist, dadurch gekennzeichnet, daß die Dickenübergänge in dem Verfahrensschritt auf eine Seite der Platine verlagert werden, in dem auch das Umformen der Platine erfolgt.
- Verfahren nach Anspruch 6, dadurch gekennzeichnet, daß Umformeinrichtungen vorgesehen sind und die Verlagerung der Dickenübergänge auf eine Seite der Platine und das Umformen der Platine mit den selben Umformeinrichtungen erfolgt.
- Verfahren nach Anspruch 7, dadurch gekennzeichnet, daß eine Umformeinrichtung vorgesehen ist, die der Platinenseite zugewandt ist, die im umgeformten Zustand der Platine einen Dickenübergang aufweisen soll, und eine zweite Umformeinrichtung vorgesehen ist, die der Platinenseite zugewandt ist, die im umgeformten Zustand der Platine plan sein soll, wobei die Umformfläche der Umformeinrichtung, die der Platinenseite zugewandt ist, die im umgeformten Zustand der Platine einen Dickenübergang aufweisen soll, eine an den zu erzielenden Dickenübergang angepaßte Form aufweist, und die Umformfläche der Umformeinrichtung, die der Platinenseite zugewandt ist, die im umgeformten Zustand der Platine plan sein soll, plan ist.
- Verfahren nach Anspruch 7 oder 8, dadurch gekennzeichnet, daß die Umformeinrichtungen einen Stempel und eine Matrize umfassen, die zum Umformen der Platine zusammenwirken.
- Verfahren nach einem der Ansprüche 7 bis 9, dadurch gekennzeichnet, daß die Umformeinrichtungen einen Niederhalter umfassen und der Niederhalter eine an den Dickenübergang angepaßte Form aufweist, wenn er auf der Platinenseite vorgesehen ist, die im umgeformten Zustand einen Dickenübergang aufweisen soll, und plan ist, wenn er auf der Platinenseite vorgesehen ist, die im umgeformten Zustand der Platine plan sein soll.
- Verfahren nach Anspruch 9 und 10, dadurch gekennzeichnet, daß der Niederhalter auf der dem Stempel entsprechenden Seite der Platine vorgesehen ist und zum Niederhalten der Platine mit der Matrize zusammenwirkt.
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE10041281 | 2000-08-22 | ||
DE10041281A DE10041281C2 (de) | 2000-08-22 | 2000-08-22 | Vorrichtung zum Umformen von Platinen aus flexibel gewalztem Metallband |
Publications (3)
Publication Number | Publication Date |
---|---|
EP1181995A2 true EP1181995A2 (de) | 2002-02-27 |
EP1181995A3 EP1181995A3 (de) | 2003-05-21 |
EP1181995B1 EP1181995B1 (de) | 2005-12-21 |
Family
ID=7653458
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP01118046A Expired - Lifetime EP1181995B1 (de) | 2000-08-22 | 2001-07-25 | Vorrichtung zum Umformen von Platinen aus flexibel gewalztem Metallband |
Country Status (6)
Country | Link |
---|---|
US (1) | US6536256B2 (de) |
EP (1) | EP1181995B1 (de) |
JP (1) | JP2002126825A (de) |
AT (1) | ATE313398T1 (de) |
DE (2) | DE10041281C2 (de) |
ES (1) | ES2252119T3 (de) |
Cited By (1)
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---|---|---|---|---|
WO2015107280A3 (fr) * | 2014-01-17 | 2015-11-05 | Gaztransport Et Technigaz | Cuve etanche et thermiquement isolante comportant des bandes metalliques |
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---|---|---|---|---|
DE10350670B3 (de) * | 2003-10-30 | 2005-02-03 | Thyssenkrupp Stahl Ag | Blechplatine für die Herstellung von Karosseriebauteilen von Kraftfahrzeugen, sowie Verfahren zum Herstellen der Blechplatine |
US9984170B2 (en) * | 2004-02-19 | 2018-05-29 | Celeritasworks, Llc | Community awareness management systems and methods |
DE102004019448A1 (de) * | 2004-04-19 | 2005-11-10 | Muhr Und Bender Kg | Hybrid hergestelltes Blechelement und Verfahren zu seiner Herstellung |
US7593772B2 (en) * | 2004-04-30 | 2009-09-22 | Lawrence Duane Sherman | Methods and devices to characterize the probability of successful defibrillation and determine treatments for ventricular fibrillation |
DE102004023885A1 (de) * | 2004-05-12 | 2005-12-08 | Muhr Und Bender Kg | Flexibles Walzen von Leichtmetallen |
DE102004039599B3 (de) * | 2004-08-13 | 2005-09-22 | Muhr Und Bender Kg | Verfahren zum Herstellen von Blechformteilen mit erweiterten Formänderungsgrenzen |
DE102008004564B4 (de) * | 2008-01-15 | 2013-04-11 | EMUGE-Werk Richard Glimpel GmbH & Co. KG Fabrik für Präzisionswerkzeuge | Bohrwerkzeug mit Ausspitzung |
DE102009053534B4 (de) | 2009-11-18 | 2019-12-19 | Elisabeth Braun | Vorrichtung und Verfahren zum Umformen und/oder Vergüten von Blechbauteilen sowie damit hergestelltes Blechformteil |
JP4625974B1 (ja) * | 2010-03-24 | 2011-02-02 | 弘士 小川 | 自動車用ドアヒンジの製造方法 |
DE102011009891A1 (de) | 2011-01-31 | 2012-08-02 | Benteler Automobiltechnik Gmbh | Verfahren zum Herstellen von Blechbauteilen sowie Vorrichtung zur Durchführung des Verfahrens |
DE102011009890A1 (de) | 2011-01-31 | 2012-08-02 | Benteler Automobiltechnik Gmbh | Verfahren zum Herstellen von Blechbauteilen und Umformwerkzeug |
CN103286158B (zh) * | 2012-02-29 | 2016-06-22 | 宝山钢铁股份有限公司 | 利用两步成型法制备不等厚直缝激光焊管的方法及装置 |
DE102013011951A1 (de) * | 2013-07-18 | 2015-01-22 | GM Global Technology Operations LLC (n. d. Ges. d. Staates Delaware) | Verfahren zum Fertigen von Kraftfahrzeug-Karosserieteilen |
CN104772566A (zh) * | 2014-01-10 | 2015-07-15 | 宝山钢铁股份有限公司 | 不等厚焊管的加工方法 |
CN112475052B (zh) * | 2020-12-18 | 2022-03-04 | 北京航星机器制造有限公司 | 异形曲面结构件的成形模具及成形方法 |
CN116765233B (zh) * | 2023-08-16 | 2023-11-24 | 昆明市明利丰通信铁塔制造有限公司 | 一种具有自动定位功能的铁塔安装位板材冲孔装置 |
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US4603806A (en) * | 1983-08-11 | 1986-08-05 | Nippon Steel Corporation | Method of manufacturing metal pipe with longitudinally differentiated wall thickness |
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US873297A (en) * | 1900-08-15 | 1907-12-10 | Rudolf Chillingworth | Process of producing hollow sheet-metal articles |
US2917823A (en) * | 1957-12-09 | 1959-12-22 | Gen Motors Corp | Method of cold forming tubular bodies having internal undercut grooves |
JPS5024899B2 (de) * | 1971-09-18 | 1975-08-19 |
-
2000
- 2000-08-22 DE DE10041281A patent/DE10041281C2/de not_active Expired - Lifetime
-
2001
- 2001-07-25 DE DE50108440T patent/DE50108440D1/de not_active Expired - Lifetime
- 2001-07-25 AT AT01118046T patent/ATE313398T1/de not_active IP Right Cessation
- 2001-07-25 ES ES01118046T patent/ES2252119T3/es not_active Expired - Lifetime
- 2001-07-25 EP EP01118046A patent/EP1181995B1/de not_active Expired - Lifetime
- 2001-08-20 JP JP2001249603A patent/JP2002126825A/ja active Pending
- 2001-08-22 US US09/933,727 patent/US6536256B2/en not_active Expired - Lifetime
Patent Citations (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US4603806A (en) * | 1983-08-11 | 1986-08-05 | Nippon Steel Corporation | Method of manufacturing metal pipe with longitudinally differentiated wall thickness |
Non-Patent Citations (1)
Title |
---|
SCHWARZ N ET AL: "FLEXIBEL GEWALZTE BLECH FUER BELASTUNGSANGEPASSTE WERKSTUECKE" WERKSTATT UND BETRIEB, CARL HANSER VERLAG. MUNCHEN, DE, Bd. 131, Nr. 5, 1. Mai 1998 (1998-05-01), Seiten 424-427, XP000776752 ISSN: 0043-2792 * |
Cited By (4)
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---|---|---|---|---|
WO2015107280A3 (fr) * | 2014-01-17 | 2015-11-05 | Gaztransport Et Technigaz | Cuve etanche et thermiquement isolante comportant des bandes metalliques |
CN106133429A (zh) * | 2014-01-17 | 2016-11-16 | 气体运输技术公司 | 包括金属带的密封且热绝缘的罐 |
AU2014377926B2 (en) * | 2014-01-17 | 2019-02-07 | Gaztransport Et Technigaz | Sealed and thermally insulating tank comprising metal strips |
CN106133429B (zh) * | 2014-01-17 | 2019-09-03 | 气体运输技术公司 | 密封且热绝缘的罐和相关的船及其用途及转移系统 |
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Publication number | Publication date |
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ES2252119T3 (es) | 2006-05-16 |
ATE313398T1 (de) | 2006-01-15 |
US6536256B2 (en) | 2003-03-25 |
EP1181995A3 (de) | 2003-05-21 |
DE50108440D1 (de) | 2006-01-26 |
DE10041281A1 (de) | 2002-03-21 |
DE10041281C2 (de) | 2002-07-11 |
US20020023475A1 (en) | 2002-02-28 |
JP2002126825A (ja) | 2002-05-08 |
EP1181995B1 (de) | 2005-12-21 |
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