EP0622141A1 - Verschluss für aus Mono- oder Multifilamentärem Verbundwirkstoff bestehendem Knüppel - Google Patents

Verschluss für aus Mono- oder Multifilamentärem Verbundwirkstoff bestehendem Knüppel Download PDF

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Publication number
EP0622141A1
EP0622141A1 EP94400893A EP94400893A EP0622141A1 EP 0622141 A1 EP0622141 A1 EP 0622141A1 EP 94400893 A EP94400893 A EP 94400893A EP 94400893 A EP94400893 A EP 94400893A EP 0622141 A1 EP0622141 A1 EP 0622141A1
Authority
EP
European Patent Office
Prior art keywords
billet
tubular body
grooves
closure
closing
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
EP94400893A
Other languages
English (en)
French (fr)
Other versions
EP0622141B1 (de
Inventor
François Peltier
Hoang Gia Ky
Mougenot Pascal
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.)
GEC Alsthom Intermagnetics SA
Original Assignee
GEC Alsthom Intermagnetics SA
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 GEC Alsthom Intermagnetics SA filed Critical GEC Alsthom Intermagnetics SA
Publication of EP0622141A1 publication Critical patent/EP0622141A1/de
Application granted granted Critical
Publication of EP0622141B1 publication Critical patent/EP0622141B1/de
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B22—CASTING; POWDER METALLURGY
    • B22F—WORKING METALLIC POWDER; MANUFACTURE OF ARTICLES FROM METALLIC POWDER; MAKING METALLIC POWDER; APPARATUS OR DEVICES SPECIALLY ADAPTED FOR METALLIC POWDER
    • B22F3/00—Manufacture of workpieces or articles from metallic powder characterised by the manner of compacting or sintering; Apparatus specially adapted therefor ; Presses and furnaces
    • B22F3/12—Both compacting and sintering
    • B22F3/1208—Containers or coating used therefor
    • B22F3/1258—Container manufacturing

Definitions

  • the present invention relates to a single or multifilament composite billet closure part.
  • the process for manufacturing monofilament or multifilament strands comprises an operation of assembling several hundred or thousands of rods (for example an alloy of niobium and titanium in a matrix of copper or nickel-copper alloy) to inside a machined cylindrical part.
  • the part is closed at its two ends by covers, or closing parts, of variable shape. These closure parts are generally fitted into the bore of the cylindrical part and welded thereto. A billet ready for spinning is thus obtained.
  • the billet thus formed must undergo an isostatic compacting operation, hot or cold, after the lids are closed by welding. Because of the radial rigidity of the closure parts, compaction of the cylindrical part is not carried out uniformly everywhere. The areas of the cylinder close to the areas of the closure parts are less compacted than the other parts of the billet and the cylindricity can be significantly affected. The product obtained after extrusion will therefore have a lack of cohesion at these locations.
  • the covers are provided with internal and external grooves allowing a radial deformation of the covers during isostatic compaction.
  • the subject of the invention is therefore a single or multifilamentary composite billet closure piece, the billet consisting of a tubular body filled with one or more cylindrical components, each end of the body tubular being closed by said closure piece which has two main faces, a first main face closing the interior of the tubular body and a second main face opposite the first, characterized in that each of the two main faces is provided with a groove closed on itself, one of the grooves surrounding the other, the depth of the grooves being such that they overlap.
  • the grooves can be circular and concentric with the axis of the tubular body when the closure piece closes off the tubular body. This facilitates their realization.
  • the grooves are advantageously straight grooves.
  • the width of the grooves and the distance separating them are preferably such that, after an isostatic compacting operation of the billet, the grooves are completely or partially filled in with the material constituting the closure part. This provides the most homogeneous compaction possible for the whole billet.
  • the closing part can be provided with a pumping tube.
  • the billet shown in Figure 1 is conventionally used for the manufacture of a multifilament strand. It is formed of hexagonal rods 1 composed of filaments of NbTi or metallic alloys embedded in a matrix of copper or other alloys or conductive metals.
  • the rods 1 are assembled in a tubular body 2 made of copper for example.
  • Each end of the tubular body 2 is closed by a flat closing part 3, 4.
  • These parts 3 and 4 fit into the bore of the tubular body 2.
  • the closing part 3 is provided with a pumping tube 5 allowing to create an air vacuum inside the billet.
  • the closing pieces are welded to the tubular body according to their joint so as to make the billet airtight.
  • the isostatic compaction has deformed certain parts of the billet as can be seen in FIG. 2.
  • the tubular body has seen its external diameter reduce somewhat except for its ends whose compaction could not be carried out because of the parts 3 and 4.
  • the central part of each closure part was also slightly depressed except for their periphery.
  • Figure 3 which is an enlarged view of a peripheral end portion of the billet, clearly shows the lack of homogeneity of the compaction at this location.
  • the rods 1 are curved and a vacuum 6 remains between the rods and the tubular body 2.
  • FIG. 4 represents the billet seen by the closure part 4.
  • the circles in dashed lines represent the internal circumference of the tubular body 2 in the central part of the billet, it is the circle 7, and in the end parts, it's circle 8.
  • a closing part 11 comprises two main faces 12 and 13.
  • the part 11 is planar and circular. It is represented in half-section.
  • the part 11 has a shoulder 14 which facilitates its fitting into the tubular body of the billet.
  • the face 13 is therefore opposite the ends of the rods.
  • the face 13 is provided with a concentric circular groove 15 and of cross section.
  • the face 12 is provided with a groove 16 similar in shape to the groove 15 but surrounded by the latter. The depth of each groove is such that the grooves overlap. There is a separating crown between them 17.
  • another closure part 21, has two main faces 22 and 23.
  • the part 21 is planar and circular. It is represented in half-section.
  • the part 21 has a shoulder 24 which facilitates its fitting into the tubular body of the billet.
  • the face 23 is therefore opposite the ends of the rods.
  • the face 23 is provided with a concentric circular groove 25 and of cross section.
  • the face 22 is provided with a groove 26 similar in shape to the groove 25 but surrounded by the latter. The depth of each groove is such that the grooves overlap. There is between them a separation crown 27.
  • the part 21 is provided axially with a hub 28 which makes it possible to create a vacuum in the billet.
  • the closure parts may be of the same metal or alloy as the tubular body or of a different nature.
  • a billet equipped with closure parts such as parts 11 and 21 allows the tubular body to deform uniformly both at the center and at its ends. This deformation makes the compaction homogeneous over the entire length of the body. It allows a better flow of products during the extrusion operation which will follow. This is shown in Figures 7 to 9.
  • Figure 8 which is an enlarged view of a peripheral end portion of the billet, clearly shows the homogeneity of the compaction at this location.
  • the rods 1 are straight and no vacuum remains between the rods and the tubular body 2.
  • the invention therefore makes it possible to obtain a better quality billet after compaction. This increases the yield overall billet after processing.
  • Another advantage lies in the fact that it is no longer necessary to carry out a retouching of machining of the tubular body, after the compacting operation, to allow extrusion. Indeed, the tubular body being compacted in a uniform manner, it can enter the extrusion container without problem.
  • closure parts having other shapes, for example with or without internal or external cone.

Landscapes

  • Engineering & Computer Science (AREA)
  • Manufacturing & Machinery (AREA)
  • Mechanical Engineering (AREA)
  • Extrusion Of Metal (AREA)
  • Superconductors And Manufacturing Methods Therefor (AREA)
EP19940400893 1993-04-29 1994-04-26 Verschluss für aus Mono- oder Multifilamentärem Verbundwirkstoff bestehendem Knüppel Expired - Lifetime EP0622141B1 (de)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FR9305090A FR2704465B1 (fr) 1993-04-29 1993-04-29 Pièce de fermeture de billette composite mono- ou multifilamentaire.
FR9305090 1993-04-29

Publications (2)

Publication Number Publication Date
EP0622141A1 true EP0622141A1 (de) 1994-11-02
EP0622141B1 EP0622141B1 (de) 1998-03-25

Family

ID=9446584

Family Applications (1)

Application Number Title Priority Date Filing Date
EP19940400893 Expired - Lifetime EP0622141B1 (de) 1993-04-29 1994-04-26 Verschluss für aus Mono- oder Multifilamentärem Verbundwirkstoff bestehendem Knüppel

Country Status (4)

Country Link
EP (1) EP0622141B1 (de)
DE (1) DE69409150T2 (de)
FI (1) FI100865B (de)
FR (1) FR2704465B1 (de)

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO1980000803A1 (en) * 1978-10-26 1980-05-01 Graenges Nyby Ab Casings and pressed pieces utilized for the extrusion of articles,in particular pipes,and method for producing such casings and pressed pieces
WO1988003449A1 (en) * 1986-11-14 1988-05-19 Uddeholm Tooling Aktiebolag Method to consolidate a metal powder body and forging produced by the method
EP0471642A2 (de) * 1990-08-13 1992-02-19 Vital Force, Inc. Behälter zur Einkapselung von Werkstücken zur Hochdruckverarbeitung
GB2257161A (en) * 1991-06-25 1993-01-06 Shell Int Research Process of forming a metal article.

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO1980000803A1 (en) * 1978-10-26 1980-05-01 Graenges Nyby Ab Casings and pressed pieces utilized for the extrusion of articles,in particular pipes,and method for producing such casings and pressed pieces
WO1988003449A1 (en) * 1986-11-14 1988-05-19 Uddeholm Tooling Aktiebolag Method to consolidate a metal powder body and forging produced by the method
EP0471642A2 (de) * 1990-08-13 1992-02-19 Vital Force, Inc. Behälter zur Einkapselung von Werkstücken zur Hochdruckverarbeitung
GB2257161A (en) * 1991-06-25 1993-01-06 Shell Int Research Process of forming a metal article.

Also Published As

Publication number Publication date
FR2704465A1 (fr) 1994-11-04
FI100865B (fi) 1998-03-13
FI941953A (fi) 1994-10-30
DE69409150D1 (de) 1998-04-30
FR2704465B1 (fr) 1995-06-23
DE69409150T2 (de) 1998-07-16
FI941953A0 (fi) 1994-04-27
EP0622141B1 (de) 1998-03-25

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