EP0481951A2 - Conteneur de billettes à chambre aplatie pour presses d'extrusion et procédé de sa fabrication - Google Patents

Conteneur de billettes à chambre aplatie pour presses d'extrusion et procédé de sa fabrication Download PDF

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Publication number
EP0481951A2
EP0481951A2 EP91890205A EP91890205A EP0481951A2 EP 0481951 A2 EP0481951 A2 EP 0481951A2 EP 91890205 A EP91890205 A EP 91890205A EP 91890205 A EP91890205 A EP 91890205A EP 0481951 A2 EP0481951 A2 EP 0481951A2
Authority
EP
European Patent Office
Prior art keywords
inner sleeve
parts
stresses
opening
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.)
Withdrawn
Application number
EP91890205A
Other languages
German (de)
English (en)
Other versions
EP0481951A3 (fr
Inventor
Werner Dr. Mitter
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.)
Voestalpine Boehler Edelstahl GmbH
Original Assignee
Boehler Edelstahl 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 Boehler Edelstahl GmbH filed Critical Boehler Edelstahl GmbH
Publication of EP0481951A2 publication Critical patent/EP0481951A2/fr
Publication of EP0481951A3 publication Critical patent/EP0481951A3/fr
Withdrawn legal-status Critical Current

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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21C—MANUFACTURE OF METAL SHEETS, WIRE, RODS, TUBES, PROFILES OR LIKE SEMI-MANUFACTURED PRODUCTS OTHERWISE THAN BY ROLLING; AUXILIARY OPERATIONS USED IN CONNECTION WITH METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL
    • B21C27/00—Containers for metal to be extruded

Definitions

  • the invention relates to a flat recipient for extrusion presses consisting of an inner sleeve, optionally formed from several parts, with a non-circular opening, which has rounded edges on the narrow sides of the cross-sectional area, and a further part, which is arranged essentially concentrically and is preferably connected to the inner sleeve by a shrink fit.
  • the invention relates to a method for producing flat receptacles according to the preamble of claim 7.
  • Recipients or block receivers with a flat opening or receiving chamber are used for the production of thin-walled flat profiles made of metals or alloys in extrusion presses.
  • the extrusion process is usually isothermal, so that at least parts, in particular the inner sleeve of the recipient, are heated by heating means to working temperatures of 400 ° C. to 550 ° C. or are kept at them.
  • internal pressures of 300 to 500 N / mm 2 generally occur, which can increase even higher with special materials and / or special profiles. Such high pressure loads lead to elastic deformation or elastic expansion of the recipient during the pressing process.
  • the inner wall of the inner sleeve experiences pulsating or alternating mechanical stresses, in particular on the narrow side or at the fillets of the opening.
  • Unstable tensile stresses particularly at elevated temperatures, can cause cracks even at low loads on the material, which may require the inner sleeve to be replaced or lead to the recipient breaking.
  • attempts have already been made to increase the number of concentrically arranged structural and supporting elements and to apply higher shrinkage stresses.
  • the invention has for its object to provide a flat recipient for extrusion presses with a non-round, narrow in the transverse axis, limited by roundings, in which the risk of cracking is avoided in the area of the roundings of the opening at high internal pressures and increases its service life and operational reliability will.
  • the object is achieved in that, at least in the area of the fillets of the opening, the wall parts in the transverse axis direction or the fillet parts of the inner sleeve have mechanical stresses which are compressive stresses in the zone of the wall or the fillet parts adjacent to the inner surface.
  • the invention is based on a further object of creating a method for producing receptacles with a flat opening, with which compressive stresses are formed in the zones of the inner sleeve near the inner surface.
  • a three-part flat recipient 1 is shown in cross section, which in the transverse axis direction AB has a flat opening 2 or a flat sensor chamber for a block.
  • the flat opening 2 is arranged centrally in an inner sleeve 3 provided with heating medium bores 32, which in turn is surrounded by a concentric intermediate sleeve 4 and an outer jacket 5, which also has heating medium bores 51.
  • the flat container 1, in particular the inner sleeve 3 is heated to an operating temperature of 500 ° to 540 ° C. by heating rods or the like in order to enable a largely isothermal pressing process.
  • FIG. 2 shows a schematic representation of a mechanical treatment of a one-piece inner sleeve 3 according to the invention.
  • pressure forces are applied to the inner surface of the inner sleeve via pressure surfaces 7 by pressure means 8 centrally across the longitudinal extension AB of the opening 2, which forces the inner sleeve to expand or become oval 9 .
  • mechanical stresses are formed which, when the compressive forces in the zones on the inner surfaces 31 and 31 'of the fillets are correspondingly high, cause plastic material deformations.
  • Fig. 3 shows a stress distribution S over the wall thickness AA 'after a mechanical treatment of the inner sleeve, the tensile stresses with Z and the compressive stresses with D are marked in the diagram.
  • the tensile stresses with Z and the compressive stresses with D are marked in the diagram.
  • the inner sleeve forming an opening 2 consists of fillet wedges 34 and 34 'and flat parts 35 and 35' provided with heating medium bores 32.
  • surface cracks occur in the central region 31 31' of the rounding-out parts 34 and 34 'in spite of a segmental construction of the inner sleeve.
  • cracking can be prevented if there are increased compressive stresses in the material in a zone in the area of the inner surfaces 31 and 31 'of the fillet portions 34, 34'.
  • FIG. 5 shows a device with which fillet parts 34, 34 'can be treated in a simple manner.
  • a rounded part 34, 34 'with an essentially circular segment-shaped cross section is applied to a base 10, 10' with a preferably concave bearing surface, which can act as a dimension, such that at least one segment end is at a distance from the bearing surface.
  • the rounded part 34, 34 ' is bent up by pressure means 8', inhomogeneous plasticization taking place over the cross section and stress relief being achieved after relief, as shown in FIG. 3.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Extrusion Of Metal (AREA)
  • Reinforcement Elements For Buildings (AREA)
  • Forging (AREA)
EP19910890205 1990-10-12 1991-09-12 Conteneur de billettes à chambre aplatie pour presses d'extrusion et procédé de sa fabrication Withdrawn EP0481951A3 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
AT2060/90 1990-10-12
AT206090A AT395687B (de) 1990-10-12 1990-10-12 Flachrezipient fuer strangpressen und verfahren zu dessen herstellung

Publications (2)

Publication Number Publication Date
EP0481951A2 true EP0481951A2 (fr) 1992-04-22
EP0481951A3 EP0481951A3 (fr) 1992-04-29

Family

ID=3526924

Family Applications (1)

Application Number Title Priority Date Filing Date
EP19910890205 Withdrawn EP0481951A3 (fr) 1990-10-12 1991-09-12 Conteneur de billettes à chambre aplatie pour presses d'extrusion et procédé de sa fabrication

Country Status (3)

Country Link
EP (1) EP0481951A3 (fr)
JP (1) JPH04274820A (fr)
AT (1) AT395687B (fr)

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0678349A1 (fr) * 1994-02-21 1995-10-25 SMS HASENCLEVER GmbH Conteneur de billettes en deux ou plusieurs parties pour le pressage de billettes plates dans l'extrusion de métaux
WO2010145087A1 (fr) * 2009-06-18 2010-12-23 西南铝业（集团）有限责任公司 Manchon interne d'un récipient d'extrusion plat et récipient d'extrusion plat
WO2013037042A1 (fr) * 2011-09-16 2013-03-21 Exco Technologies Limited Contenant pour presse à extrusion et sa chemise
US20160114367A1 (en) * 2014-10-27 2016-04-28 Exco Technologies Limited Extrusion press container and mantle for same, and method
CN115780553A (zh) * 2022-10-26 2023-03-14 中国重型机械研究院股份公司 一种大型扁挤压筒用的分区加热系统

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP5839455B2 (ja) 2011-09-13 2016-01-06 日本軽金属株式会社 中空形材成形用押出ダイス
DE102016004223B3 (de) * 2016-04-07 2017-05-04 Mario Schierz Verfahren zur Herstellung rein elastisch ausgelegter Pressverbindungen unter Ausnutzung plastischen Materialverhaltens

Family Cites Families (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB783863A (en) * 1954-04-12 1957-10-02 Loewy Eng Co Ltd Billet holding container for metal extrusion presses
US3089591A (en) * 1959-07-11 1963-05-14 Schloemann Ag Container for metal tube and extrusion presses
DE1527861A1 (de) * 1966-06-15 1969-07-24 Schloemann Ag Induktiv beheizter Blockaufnehmer von Strangpressen
DE2417815C2 (de) * 1974-04-11 1982-07-08 Aluminium-Walzwerke Singen Gmbh, 7700 Singen Blockaufnehmer für Strangpressen
US3892114A (en) * 1974-07-10 1975-07-01 Ube Industries Containers for use in extrusion press and method of manufacturing the same
DE2434221C3 (de) * 1974-07-16 1980-05-08 Ube Industries, Ltd., Ube, Yamaguchi (Japan) Blockaufnehmer für Metallstrangpressen
US4182152A (en) * 1977-09-08 1980-01-08 Westinghouse Electric Corporation Grid sleeve bulge tool
DE3512574A1 (de) * 1985-04-06 1986-10-16 SMS Hasenclever Maschinenfabrik GmbH, 4000 Düsseldorf Blockaufnehmer fuer metallstrangpressen

Cited By (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0678349A1 (fr) * 1994-02-21 1995-10-25 SMS HASENCLEVER GmbH Conteneur de billettes en deux ou plusieurs parties pour le pressage de billettes plates dans l'extrusion de métaux
WO2010145087A1 (fr) * 2009-06-18 2010-12-23 西南铝业（集团）有限责任公司 Manchon interne d'un récipient d'extrusion plat et récipient d'extrusion plat
CN101927275B (zh) * 2009-06-18 2012-05-23 西南铝业（集团）有限责任公司 一种扁挤压筒的内套及扁挤压筒
WO2013037042A1 (fr) * 2011-09-16 2013-03-21 Exco Technologies Limited Contenant pour presse à extrusion et sa chemise
US20130074568A1 (en) * 2011-09-16 2013-03-28 Exco Technologies Limited Extrusion press container and liner for same
US9975160B2 (en) 2011-09-16 2018-05-22 Exco Technologies Limited Extrusion press container and liner for same
US20160114367A1 (en) * 2014-10-27 2016-04-28 Exco Technologies Limited Extrusion press container and mantle for same, and method
US10434553B2 (en) * 2014-10-27 2019-10-08 Exco Technologies Limited Extrusion press container and mantle for same, and method
CN115780553A (zh) * 2022-10-26 2023-03-14 中国重型机械研究院股份公司 一种大型扁挤压筒用的分区加热系统

Also Published As

Publication number Publication date
ATA206090A (de) 1992-07-15
JPH04274820A (ja) 1992-09-30
AT395687B (de) 1993-02-25
EP0481951A3 (fr) 1992-04-29

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