EP0673694B1 - Verfahren zum Umformen metallischer Körper mittels über ein druckübertragendes Medium aufgebrachter hoher Drücke, Anwendung des Verfahrens und Vorrichtung dazu - Google Patents

Verfahren zum Umformen metallischer Körper mittels über ein druckübertragendes Medium aufgebrachter hoher Drücke, Anwendung des Verfahrens und Vorrichtung dazu Download PDF

Info

Publication number
EP0673694B1
EP0673694B1 EP95102201A EP95102201A EP0673694B1 EP 0673694 B1 EP0673694 B1 EP 0673694B1 EP 95102201 A EP95102201 A EP 95102201A EP 95102201 A EP95102201 A EP 95102201A EP 0673694 B1 EP0673694 B1 EP 0673694B1
Authority
EP
European Patent Office
Prior art keywords
transmitting medium
pressure
pressure transmitting
process according
lead
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
EP95102201A
Other languages
German (de)
English (en)
French (fr)
Other versions
EP0673694A1 (de
Inventor
Gerald Dipl.-Ing. Stein
Joachim Dr. Ing. Menzel
Joachim Dr. Ing. Lueg
Heinrich Prof. Dr. Feichtinger
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.)
Vereinigte Schmiedewerke GmbH
Original Assignee
Vereinigte Schmiedewerke GmbH
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 Vereinigte Schmiedewerke GmbH filed Critical Vereinigte Schmiedewerke GmbH
Publication of EP0673694A1 publication Critical patent/EP0673694A1/de
Application granted granted Critical
Publication of EP0673694B1 publication Critical patent/EP0673694B1/de
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

Links

Images

Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21K—MAKING FORGED OR PRESSED METAL PRODUCTS, e.g. HORSE-SHOES, RIVETS, BOLTS OR WHEELS
    • B21K1/00—Making machine elements
    • B21K1/76—Making machine elements elements not mentioned in one of the preceding groups
    • B21K1/761—Making machine elements elements not mentioned in one of the preceding groups rings
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21C—MANUFACTURE OF METAL SHEETS, WIRE, RODS, TUBES OR PROFILES, OTHERWISE THAN BY ROLLING; AUXILIARY OPERATIONS USED IN CONNECTION WITH METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL
    • B21C23/00—Extruding metal; Impact extrusion
    • B21C23/001—Extruding metal; Impact extrusion to improve the material properties, e.g. lateral extrusion
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21C—MANUFACTURE OF METAL SHEETS, WIRE, RODS, TUBES OR PROFILES, OTHERWISE THAN BY ROLLING; AUXILIARY OPERATIONS USED IN CONNECTION WITH METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL
    • B21C23/00—Extruding metal; Impact extrusion
    • B21C23/007—Hydrostatic extrusion
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21C—MANUFACTURE OF METAL SHEETS, WIRE, RODS, TUBES OR PROFILES, OTHERWISE THAN BY ROLLING; AUXILIARY OPERATIONS USED IN CONNECTION WITH METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL
    • B21C37/00—Manufacture of metal sheets, bars, wire, tubes or like semi-manufactured products, not otherwise provided for; Manufacture of tubes of special shape
    • B21C37/06—Manufacture of metal sheets, bars, wire, tubes or like semi-manufactured products, not otherwise provided for; Manufacture of tubes of special shape of tubes or metal hoses; Combined procedures for making tubes, e.g. for making multi-wall tubes
    • B21C37/15—Making tubes of special shape; Making tube fittings
    • B21C37/28—Making tube fittings for connecting pipes, e.g. U-pieces
    • B21C37/29—Making branched pieces, e.g. T-pieces
    • B21C37/294—Forming collars by compressing a fluid or a yieldable or resilient mass in the tube

Definitions

  • the invention relates to a method for forming metallic body by means of a pressure transmitting Medium applied high pressures, applications of this Process on different forming processes and one hot isostatic press.
  • Metal workpieces are basically formed either by direct attack on the sinker (Press ram, hammer) or indirectly via a pressure medium (Liquid, such as oil or gas) on the body to be formed.
  • Classic deformation processes in the first category are eating, hammering, forging, upsetting.
  • the present invention is concerned with the second Category in which the forming via a printing medium he follows.
  • Such methods are in a variety of Executions known.
  • DE-A-28 becomes representative 06 008 called, after which a strain hardened cylinder is made in such a way that it is between two ring-shaped flanges clamped and then from the inside pressurized with a liquid becomes.
  • a process for the production of steel cap rings known that the winding heads against the turbo-generators centrifugal force caused by the rotary movement of the rotor have to hold.
  • a cap ring is made using two frustoconical ram, which over oil as Pressure medium the cap ring with deformation energy act, expanded.
  • Pressure medium uses a gas.
  • the invention is based on the object, the method for forming metallic bodies using a pressure transmitting medium applied high pressures to improve in that even the highest pressures without Sealing problems can be applied. It should also no pressure medium when using the highest pressures any leaks in the forming device emerge. The build-up of the highest pressures should also help small amounts of the sinker can be reached.
  • the invention proposes that as a pressure-transmitting medium a low-melting Metal or a low melting metal alloy with high Plasticity is used, being the pressure transmitting medium by staring under the influence of a force Displacement body is pressurized so that the through the displacement of the sinker on the pressure-transmitting medium predominantly exerted force a corresponding deformation of the metallic body and the remaining part of the force Pressure building column with part of the pressure-transmitting medium sealingly filling it seals due to the flow resistance and due to which lubricates.
  • This Measure solves the task, because when pressurized, the metallic Press medium into any gaps and seal this off. Furthermore, the desired high pressure build-up even with a short movement length of the or Displacement body reached because the compressibility of the metallic printing medium is compared to the known liquid or gaseous pressure media considerably lower.
  • the pressure transmitting medium should preferably be on a Be heated to at least 40% of the temperature Liquidus temperature is. It is doing this from the usual Usually assumed that the area of hot forming is above a temperature that is 50% of the absolute Melting temperature corresponds. The area is through the Start of thermally activated processes marked. Especially through the process of recrystallization, which, in contrast to cold forming, does not result in a Consolidation is coming. This is the area of Hot forging temperature of the metallic pressure medium, in which has the most favorable flow behavior.
  • the pressure-transmitting medium during the forming process partly in the liquid and partly in the solid state be used.
  • This condition begins, for example, if you put the pressure medium in the liquid state in the Press cavity fills, after which it is on the walls of the Press cavity cools and forms a shell around the liquid core solidifies.
  • the liquid core can be under Displace pressure even better than if the metallic Print medium is in the solid state.
  • a plastically deformable wall hinder the heat transfer.
  • lead or a lead alloy has proven itself best.
  • Lead has alongside the desired low melting point Flow property because its strength is low and Extensibility is great. It also has excellent Lubricating properties. Therefore, it should be after the intrusion into the column between which is relative to each other moving parts of the pressing device and / or between this and the compact as a lubricant and promotes for example, avoiding the body to be reshaped under pressure, without wear marks on the To leave a pressing device.
  • Lead or one Lead alloys can be left almost without residue use so that no waste disposal problems arise.
  • Lead also has the advantageous property in Iron to be insoluble. So it comes to the Contact areas between the formed from a Iron alloy and lead as a pressure medium Alloy with lead.
  • the lead can be warmed to one Temperature above its melting temperature without residues removed from the pressing device and / or the molded article, collected and reused as mentioned.
  • At least the in part of the immediate vicinity of the column pressure-transmitting medium to its flow resistance reducing temperature can be heated. This makes it easier the penetration of the print medium into the column where it is then cools, solidifies and seals the gaps and also acts as a lubricant.
  • a preferred application of the method according to the invention is on expanding a metallic on both ends open cylindrical hollow body, such as a cap ring, directed.
  • the inside of the hollow body with the pressure-transmitting medium filled, the open ends are closed by rigid walls under pressure, and the pressure transmitting medium is replaced by at least one Displacer pressurized.
  • the metallic pressure-transmitting medium can be in the solid state be filled in or half solid or half liquid, however also completely in a liquid state.
  • At least one of the wall should preferably the displacer in the form of a coaxial to the axis of symmetry of the hollow body itself form tapered cone. It should be one Cone shape for the displacement body can be chosen that through its movement into the pressure-transmitting medium the hollow body is expanded into the desired shape.
  • the Volume of the conical displacement body should be correspond at least to the volume required for the Volume increase required when forming the workpiece becomes.
  • Another preferred application of the invention Process is based on the reduction of cross section Long products, such as round bars, straightened by extrusion.
  • the gap between a pressure-resistant form and the long product passed coaxially through it filled with the pressure transmitting medium.
  • the long product is surrounding with it as a lubricant pressure transmitting medium through a cross-section-reducing nozzle extruded. It can pressure-transmitting medium continuously or batchwise be refilled in the mold.
  • the metal body to be reshaped before the reshaping elevated temperature, in particular hot forming temperature, be heated.
  • the process is directed to hot isostatic pressing.
  • This is the metallic body to be formed containing press cavity with the pressure transmitting Medium filled in a liquid state, and this is then by a press ram as a displacement body under high Pressure put.
  • a hot isostatic press to perform the aforementioned Application consists of a cylindrical Press mold with a bottom that after the insertion of the Compact is closable. It also points one into that opposite open end of the mold retractable Press on, a nozzle for the supply of liquid Lead or a liquid lead alloy and a middle one Stop for the compact, especially in the form of a cross sieve inserted into the press cavity.
  • a nozzle for the supply of liquid Lead or a liquid lead alloy and a middle one Stop for the compact, especially in the form of a cross sieve inserted into the press cavity.
  • the body to be formed can preferably be formed before the pressing process with a heat-insulating layer, e.g. an enamel layer or coated with a ceramic layer whose Resistance to deformation does not hinder the forming process.
  • a heat-insulating layer e.g. an enamel layer or coated with a ceramic layer whose Resistance to deformation does not hinder the forming process.
  • a metallic body 1 in the form of a ring from a high strength austinitic steel is between a Base plate 32 and a cover plate 31 set by Apply pressure forces 51, 52 to enclose body 1.
  • a piston 4 By one on a piston 4 as a displacement body acting force 1 is through the channel 30 in the base plate 32 lead 2 pressed into the interior of the body 1.
  • the lead has a between room temperature and his Melting point temperature, preferred Hot forming temperature.
  • By closing the annular gap The pressure medium can lead to the build up of pressure Internal pressure take place, which is required to expand the body 1 becomes.
  • Fig. 2 shows a modified version with a Upper punch 41, the conical surface 42 in variable slope is shaped so that a movement of the Cone into the body 1 to a volume displacement leads. This should be at least the amount which by the volume increase of the expanded annular body 1 arises, so that the difference in Form of a lubricating film 21 can flow.
  • FIG. 2 schematically illustrated pressing device was a Experiment carried out.
  • a ring was made from one high-strength nitrogen-containing austenitic steel alloy with 18% chromium, 18% manganese and 0.6% nitrogen as essential alloying elements for the purpose of Strain hardening widened.
  • the initial dimensions of the ring were 200 mm inside diameter, 280 mm outside diameter, 370 mm length.
  • cap rings when building power generators used. You must not use ferromagnetic Have properties and must be high Toughness also have high strength. The required yield strength of 1100 to 1500 MPa can only be set by work hardening. While easily with rings with large diameter Expanding over a cone with a series of wedges is possible, this method can be used for rings with little Inner diameters cannot be used because of the specific surface friction becomes so great that a elaborate lubrication technology no longer leads to the goal.
  • the body 1 is in a gastight envelope welded and wound sheet metal coil, which on the Hot forming temperature of 1200 ° C was heated.
  • the sheet coil is separated from the pressure-transmitting medium 2.
  • the layer 6 reduces the heat transfer between the hot sheet coil and the pressure-transmitting medium 2 and thus prevents its impermissible overheating on the one hand and an excessively rapid cooling of the sheet coil on the other hand.
  • a Laminate from a stainless steel sheet for the manufacture of a massive high-strength ring A chrome-nickel steel sheet with a thickness of 0.6 mm and a width of 350 mm in a nitrogen atmosphere at 1200 ° C to 0.4% Embroidered nitrogen content and then on a Winding spool with two side walls of 420 mm in diameter and a mandrel with 260 mm outer diameter wound up. The last winding layer was 415 mm, and that The total weight of the stainless sheet was 196 kg. A Steel sheet was pressed tightly around the last winding layer and welded tightly to the side walls so that a gas-tight package was created.
  • the lead-filled pipe expanded until it got hot Tin coil contact.
  • the Pressure in the lead increased to approx. 500 bar until the contact the sheet coil was reached with the support ring 7. This was shown by an increase in the baling pressure to 2100 bar. This pressure was maintained for half a minute received and then was exonerated. It showed the lead was still solid, i.e. the composite out Cardboard and tin had worked flawlessly.
  • the intermediate ring prevented heat exchange between the sheet coil and the lead, on the other hand the pressure of the lead on the sheet coil. Only after 2 For hours the temperature in the lead rose so high that it began to melt. Since the intermediate ring has a The lead container could be put on removed from the coil in this way without difficulty become. The later metallographic examination of the Tin coils resulted in a perfect weld of the individual sheet phases within the coil.
  • the displacement body 41 with frustoconical pressure surface is caused by the force 51 via the stamp as a displacement body 4 through the body 1 pressed to expand it.
  • the cavity of the Body 1 is filled with lead 2, which at the Forward movement of the displacer 4 through the gap between this and the body 1 to form a Lubricating film 21 between both parts and the body 1 is ousted.
  • Fig. 5 shows the extrusion of a long product, here of a round bar.
  • the metallic body 1 to be formed is inserted and the space between it and the wall of the cavity 33 is filled with lead 2. Due to the pressure force 51 on the ram 4, the body 1 to be formed under Cross-sectional reduction through the extrusion die 35 pushed. Through the gap between the inner surface of the Extrusion die 35 and the outer surface of the body 1 with reduced cross section becomes a lead film 21 pressed out, which promotes the extrusion process.
  • FIG. 6 shows the automatic refilling of lead in the Extruder.
  • a drum 37 has regularly distributed Bores 39. At one point there is a cylindrical body 24, e.g. made of lead, inserted into a bore 39. After there is a corresponding rotation of the drum 37 an identical cylindrical lead body 25 in front of the cavity 33 of the extrusion mold 34.
  • FIG. 7 shows an extrusion device as in FIG. 5 7, however, the lead in poured liquid form in the cavity 33 or the like as shot with die casting.
  • the extrusion die 35 and / or the directly adjacent area of the extrusion mold 34 is water-cooled. As a result, solidifies in this area 23 the lead and forms through its increased flow resistance a sealing and lubricating film 21 over which the hydraulic pressure in cavity 33 of extrusion die 34 can be built.
  • Fig. 8 shows in the picture parts a) to c) a press for hot isostatic presses.
  • a pressure-resistant container 34 can be provided with a bottom Bottom cover 32 are closed. He has one Inner bore of e.g. 40 mm diameter, which in the lower Area with a ceramic lining 61 thermal is isolated. This thermal insulation 61, e.g. An inserted ceramic paper can become one Ceramic sieve plate 62 placed, which is similar to that known sieve cores in gate systems of castings is constructed. Above the sieve plate 62 the tapers Cavity 33 of the pressure-resistant container 34 on a Section 33a to the inside diameter of the cylindrical portion 33b in which the ram 4 with can run a certain game. Is located on the side flameproof container still a hole in the one Ceramic tube 8 is inserted, through which liquid lead 2 can be introduced.
  • the known Die casting technology can be used.
  • the Atmosphere in the container space 33 can be via the air gap flow between the punch 4 and the inner surface 33b.
  • the level of the lead 2 reaches e.g. up to level 82. Due to the buoyancy of the heavy lead melt, the body is 1 floated, but is through the sieve plate 62 on further ascent prevented.
  • the pressure is released and the Bottom cover 32 opened, whereupon the content expelled can be. It falls e.g. on a sieve, where the lead with the residual heat flows off and flows into a collecting tank. From there it is ready for the next shot.
  • lead has one has a low melting point of 327 ° C that the Boiling point, however, only at temperatures above 1600 ° C lies.
  • the usual for metal compression Temperatures of e.g. The steam pressure is only 1150 ° C in the range of 10 mbar. Highly heated lead would, however do not come into contact with the environment because it is immediate after injection, a dense shell made of solid lead forms.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Press Drives And Press Lines (AREA)
  • Extrusion Of Metal (AREA)
  • Forging (AREA)
  • Shaping Metal By Deep-Drawing, Or The Like (AREA)
  • Pens And Brushes (AREA)
  • Encapsulation Of And Coatings For Semiconductor Or Solid State Devices (AREA)
  • Pressure Welding/Diffusion-Bonding (AREA)
EP95102201A 1994-03-09 1995-02-17 Verfahren zum Umformen metallischer Körper mittels über ein druckübertragendes Medium aufgebrachter hoher Drücke, Anwendung des Verfahrens und Vorrichtung dazu Expired - Lifetime EP0673694B1 (de)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE4407908A DE4407908C2 (de) 1994-03-09 1994-03-09 Verfahren zum Umformen metallischer Körper mittels über ein druckübertragendes Medium aufgebrachter hoher Drücke und Vorrichtung dazu
DE4407908 1994-03-09

Publications (2)

Publication Number Publication Date
EP0673694A1 EP0673694A1 (de) 1995-09-27
EP0673694B1 true EP0673694B1 (de) 1999-10-06

Family

ID=6512305

Family Applications (1)

Application Number Title Priority Date Filing Date
EP95102201A Expired - Lifetime EP0673694B1 (de) 1994-03-09 1995-02-17 Verfahren zum Umformen metallischer Körper mittels über ein druckübertragendes Medium aufgebrachter hoher Drücke, Anwendung des Verfahrens und Vorrichtung dazu

Country Status (5)

Country Link
EP (1) EP0673694B1 (ja)
JP (1) JP2675765B2 (ja)
AT (1) ATE185294T1 (ja)
DE (2) DE4407908C2 (ja)
ZA (1) ZA951925B (ja)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN103143622A (zh) * 2013-02-26 2013-06-12 武汉理工大学 一种用于提高厚壁金属管件成形性能的介质成形方法

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE19753658C2 (de) * 1997-12-03 2000-07-20 Fraunhofer Ges Forschung Verfahren zur Herstellung eines Bauteils, das eine aus einem duktilen Material gebildete Materiallage aufweist, sowie eine Vorrichtung zur Durchführung des Verfahrens und ein Bauteil, hergestellt nach einem derartigen Verfahren
RU2191652C1 (ru) * 2001-04-04 2002-10-27 Глухов Дмитрий Евгеньевич Способ получения заготовок с мелкозернистой структурой
BE1019737A3 (fr) * 2010-05-18 2012-12-04 Agc Glass Europe Espaceur pour panneau de vitrage sous vide, panneau de vitrage sous vide et procede de fabrication correspondants.

Family Cites Families (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2155194C3 (de) * 1971-11-06 1978-11-09 Fried. Krupp Gmbh, 4300 Essen Vorrichtung zum hydraulischen Aufweiten eines metallischen Hohlkörpers
JPS4917571A (ja) * 1972-06-12 1974-02-16
CH625273A5 (ja) * 1978-01-25 1981-09-15 Bbc Brown Boveri & Cie
JPS5744425A (en) * 1980-08-12 1982-03-12 Kobe Steel Ltd Cold working method and apparatus of annular material
JPS5973130A (ja) * 1982-10-19 1984-04-25 Takayasu Kogyo Kk 管継手用分岐管の製造方法
JPS6046303A (ja) * 1983-08-22 1985-03-13 M C L:Kk 熱間等方圧加圧方法
JPH01245940A (ja) * 1988-03-28 1989-10-02 Shinei Sangyo Kk エアコン用ｔ字管の製造方法

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN103143622A (zh) * 2013-02-26 2013-06-12 武汉理工大学 一种用于提高厚壁金属管件成形性能的介质成形方法
CN103143622B (zh) * 2013-02-26 2016-03-09 武汉理工大学 一种用于提高厚壁金属管件成形性能的介质成形方法

Also Published As

Publication number Publication date
JP2675765B2 (ja) 1997-11-12
JPH08141685A (ja) 1996-06-04
ATE185294T1 (de) 1999-10-15
DE4407908A1 (de) 1995-09-14
DE4407908C2 (de) 1998-04-23
ZA951925B (en) 1995-12-11
DE59506966D1 (de) 1999-11-11
EP0673694A1 (de) 1995-09-27

Similar Documents

Publication Publication Date Title
DE102007018395B4 (de) Innenhochdruck-Umformverfahren
DE2953474C2 (de) Druckgießverfahren mit Nachverdichtung
EP0032545A1 (de) Verfahren und Vorrichtung zur Umwandlung von Stoffen unter Anwendung hoher Drucke und Temperaturen
DE2310536A1 (de) Verfahren zur herstellung von gegenstaenden aus verbundmetall
DE3014456A1 (de) Spritzgussverfahren
DE19644999C1 (de) Verfahren zur Herstellung innenplattierter Metallrohre
DE2231807C3 (de) Hülse als zylindrische Druckkammer für eine Druckgießmaschine
DE3221887A1 (de) Verfahren zum herstellen von bimetall-rohren
DE2228793A1 (de) Zusammengesetzte Buchse fur hohe Beanspruchungen und Verfahren zu ihrer Herstellung
DE19532253C2 (de) Verfahren zur Herstellung von dünnwandigen Rohren (II)
EP0281591B1 (de) Verfahren, vorrichtung und kapsel zur pulvermetallurgischen herstellung von rohren oder dgl. langgestreckten profilen
EP1063029B1 (de) Verfahren zum Innendruckformen eines hohlen metallischen Werkstücks
EP0281515B1 (de) Vorrichtung zum Kühlen einer Leichtmetall-Strangpresse
EP0014975B1 (de) Verfahren zur Herstellung von Presslingen aus Metallpulver
DE102007018066B4 (de) Vorrichtung zum Impuls-Innenhochdruck Umformen von blechartigen Werkstücken
EP0673694B1 (de) Verfahren zum Umformen metallischer Körper mittels über ein druckübertragendes Medium aufgebrachter hoher Drücke, Anwendung des Verfahrens und Vorrichtung dazu
DE2711810A1 (de) Walzenaufbau
DE2745020A1 (de) Pressverfahren fuer metallpulver
WO2008003305A1 (de) Verfahren zur herstellung eines rotationssymmetrischen teils und danach hergestelltes teil
EP0039013A1 (de) Strangpressverfahren
DE19907018B4 (de) Verfahren zum Verformen von Hohlkörpern aus Metall
DE19956191A1 (de) Verfahren und Vorrichtung zum Verformen von Hohlkörper-Werkstücken aus Metall
EP1657010A1 (de) Verfahren zur Herstellung eines Rohrförmigen Metallkörpers mit in den Mantel integrierter Wärmetauscherleitung
DE102004042706B3 (de) Werkzeug zum Thixoschmieden
DE69826234T2 (de) Ein hydroformierungsverfahren

Legal Events

Date Code Title Description
PUAI Public reference made under article 153(3) epc to a published international application that has entered the european phase

Free format text: ORIGINAL CODE: 0009012

AK Designated contracting states

Kind code of ref document: A1

Designated state(s): AT BE DE FR GB IT LU SE

17P Request for examination filed

Effective date: 19951227

17Q First examination report despatched

Effective date: 19970523

GRAG Despatch of communication of intention to grant

Free format text: ORIGINAL CODE: EPIDOS AGRA

GRAG Despatch of communication of intention to grant

Free format text: ORIGINAL CODE: EPIDOS AGRA

GRAG Despatch of communication of intention to grant

Free format text: ORIGINAL CODE: EPIDOS AGRA

GRAH Despatch of communication of intention to grant a patent

Free format text: ORIGINAL CODE: EPIDOS IGRA

GRAH Despatch of communication of intention to grant a patent

Free format text: ORIGINAL CODE: EPIDOS IGRA

GRAA (expected) grant

Free format text: ORIGINAL CODE: 0009210

AK Designated contracting states

Kind code of ref document: B1

Designated state(s): AT BE DE FR GB IT LU SE

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: GB

Free format text: LAPSE BECAUSE OF FAILURE TO SUBMIT A TRANSLATION OF THE DESCRIPTION OR TO PAY THE FEE WITHIN THE PRESCRIBED TIME-LIMIT

Effective date: 19991006

REF Corresponds to:

Ref document number: 185294

Country of ref document: AT

Date of ref document: 19991015

Kind code of ref document: T

REF Corresponds to:

Ref document number: 59506966

Country of ref document: DE

Date of ref document: 19991111

ET Fr: translation filed
ITF It: translation for a ep patent filed
PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: SE

Payment date: 20000203

Year of fee payment: 6

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: LU

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 20000217

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: BE

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 20000228

GBV Gb: ep patent (uk) treated as always having been void in accordance with gb section 77(7)/1977 [no translation filed]

Effective date: 19991006

PLBE No opposition filed within time limit

Free format text: ORIGINAL CODE: 0009261

STAA Information on the status of an ep patent application or granted ep patent

Free format text: STATUS: NO OPPOSITION FILED WITHIN TIME LIMIT

BERE Be: lapsed

Owner name: VEREINIGTE SCHMIEDEWERKE G.M.B.H.

Effective date: 20000228

26N No opposition filed
PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: SE

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 20010218

EUG Se: european patent has lapsed

Ref document number: 95102201.1

PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: AT

Payment date: 20090224

Year of fee payment: 15

PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: DE

Payment date: 20090224

Year of fee payment: 15

PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: IT

Payment date: 20090225

Year of fee payment: 15

PGFP Annual fee paid to national office [announced via postgrant information from national office to epo]

Ref country code: FR

Payment date: 20090224

Year of fee payment: 15

REG Reference to a national code

Ref country code: FR

Ref legal event code: ST

Effective date: 20101029

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: AT

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 20100217

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: FR

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 20100301

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: DE

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 20100901

PG25 Lapsed in a contracting state [announced via postgrant information from national office to epo]

Ref country code: IT

Free format text: LAPSE BECAUSE OF NON-PAYMENT OF DUE FEES

Effective date: 20100217