EP0673694A1 - Procédé pour former des corps métalliques à l'aide de hautes pressions développées par un milieu transmettant la pression, utilisation du procédé et dispositif à cet usage - Google Patents

Procédé pour former des corps métalliques à l'aide de hautes pressions développées par un milieu transmettant la pression, utilisation du procédé et dispositif à cet usage Download PDF

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Publication number
EP0673694A1
EP0673694A1 EP95102201A EP95102201A EP0673694A1 EP 0673694 A1 EP0673694 A1 EP 0673694A1 EP 95102201 A EP95102201 A EP 95102201A EP 95102201 A EP95102201 A EP 95102201A EP 0673694 A1 EP0673694 A1 EP 0673694A1
Authority
EP
European Patent Office
Prior art keywords
pressure
transmitting medium
lead
forming
temperature
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
EP95102201A
Other languages
German (de)
English (en)
Other versions
EP0673694B1 (fr
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/fr
Application granted granted Critical
Publication of EP0673694B1 publication Critical patent/EP0673694B1/fr
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
    • 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

  • Metal workpieces are generally formed either by direct attack of the displacement body (press ram, hammer) or indirectly via a pressure medium (liquid such as oil or gas) on the body to be formed.
  • Classical deformation processes in the first category are pressing, hammering, forging, upsetting.
  • a low-melting metal or a low-melting metal alloy with high plasticity is used as the pressure-transmitting medium.
  • This measure according to the invention achieves the stated task, because when the pressure is applied, the metallic pressure medium is pressed into any gaps and seals them. Furthermore, the desired high pressure build-up is achieved even with a short movement length of the displacement body or bodies, because the compressibility of the metallic pressure medium is considerably lower than that of the known liquid or gaseous pressure media.
  • the lead or a lead alloy can be reused almost without residue, so that there are no waste disposal problems.
  • Lead also has the advantageous property of being insoluble in iron. As a result, there is no lead alloying on the contact surfaces between the iron alloy blank and the pressure medium lead.
  • the lead can be removed by heating to a temperature above its melting temperature without leaving any residue from the pressing device and / or the molded article, collected and, as said, used again.
  • a preferred application of the method according to the invention is directed to the expansion of a metallic hollow cylindrical body open at both ends, for example a cap ring.
  • the interior of the hollow body is filled with the pressure-transmitting medium, the open ends are closed by rigid walls under pressure, and the pressure-transmitting medium is pressurized by at least one displacement body.
  • the metallic pressure-transmitting medium can be filled in in the solid state or semi-solid or semi-liquid, but also completely in the liquid state.
  • At least one of the walls should preferably form the displacement body in the form of a conical tapering towards the axis of symmetry of the hollow body.
  • Such a conical shape should be chosen for the displacement body that the hollow body is expanded into the desired shape by its movement into the pressure-transmitting medium.
  • the volume of the conical displacement body should at least correspond to the volume that is required for the increase in volume when the workpiece is formed.
  • a pressure-resistant container 34 can be closed at the bottom with a bottom cover 32. It has an inner bore of e.g. 40 mm diameter, which is thermally insulated in the lower area with a ceramic lining 61.
  • This thermal insulation 61 e.g. a ceramic paper can be inserted, a ceramic sieve plate 62 is placed, which is constructed similarly to the known sieve cores in gate systems of castings.
  • the cavity 33 of the pressure-resistant container 34 tapers over a section 33a to the inside diameter of the cylindrical section 33b, in which the press ram 4 can run with a certain play. Laterally there is a bore in the pressure-resistant container in which a ceramic tube 8 is inserted, through which liquid lead 2 can be introduced.
  • a body 1 to be pressed is now moved into the interior 33, which had already been brought to the working temperature in an upstream heat treatment furnace.
  • the lid 32 is then closed and pressure-tightly coupled to the container 34 in a manner not described in detail.
  • the container 34 contains water cooling, which is not shown in detail.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Press Drives And Press Lines (AREA)
  • Shaping Metal By Deep-Drawing, Or The Like (AREA)
  • Extrusion Of Metal (AREA)
  • Forging (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 Procédé pour former des corps métalliques à l'aide de hautes pressions développées par un milieu transmettant la pression, utilisation du procédé et dispositif à cet usage Expired - Lifetime EP0673694B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE4407908 1994-03-09
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

Publications (2)

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

Family

ID=6512305

Family Applications (1)

Application Number Title Priority Date Filing Date
EP95102201A Expired - Lifetime EP0673694B1 (fr) 1994-03-09 1995-02-17 Procédé pour former des corps métalliques à l'aide de hautes pressions développées par un milieu transmettant la pression, utilisation du procédé et dispositif à cet usage

Country Status (5)

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

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2002081762A2 (fr) * 2001-04-04 2002-10-17 Dmitry Evgenievich Glukhov Procede de production d'ebauches ayant une structure a grains fins

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
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.
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

Citations (3)

* 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
DE2806008A1 (de) * 1978-01-25 1979-08-02 Bbc Brown Boveri & Cie Verfahren zur herstellung eines kaltverfestigten zylinders und vorrichtung zur durchfuehrung des verfahrens
US4364251A (en) * 1980-08-12 1982-12-21 Kobe Steel, Limited Method and apparatus for cold-working annular workpieces

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS4917571A (fr) * 1972-06-12 1974-02-16
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

Patent Citations (3)

* 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
DE2806008A1 (de) * 1978-01-25 1979-08-02 Bbc Brown Boveri & Cie Verfahren zur herstellung eines kaltverfestigten zylinders und vorrichtung zur durchfuehrung des verfahrens
US4364251A (en) * 1980-08-12 1982-12-21 Kobe Steel, Limited Method and apparatus for cold-working annular workpieces

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2002081762A2 (fr) * 2001-04-04 2002-10-17 Dmitry Evgenievich Glukhov Procede de production d'ebauches ayant une structure a grains fins
WO2002081762A3 (fr) * 2001-04-04 2002-11-28 Dmitry Evgenievich Glukhov Procede de production d'ebauches ayant une structure a grains fins

Also Published As

Publication number Publication date
JP2675765B2 (ja) 1997-11-12
ATE185294T1 (de) 1999-10-15
DE4407908A1 (de) 1995-09-14
EP0673694B1 (fr) 1999-10-06
JPH08141685A (ja) 1996-06-04
ZA951925B (en) 1995-12-11
DE4407908C2 (de) 1998-04-23
DE59506966D1 (de) 1999-11-11

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