EP0622141B1 - 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
EP0622141B1
EP0622141B1 EP19940400893 EP94400893A EP0622141B1 EP 0622141 B1 EP0622141 B1 EP 0622141B1 EP 19940400893 EP19940400893 EP 19940400893 EP 94400893 A EP94400893 A EP 94400893A EP 0622141 B1 EP0622141 B1 EP 0622141B1
Authority
EP
European Patent Office
Prior art keywords
billet
grooves
closure part
tubular body
closure
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
EP19940400893
Other languages
English (en)
French (fr)
Other versions
EP0622141A1 (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
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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 closure part single or multifilament composite billet according to the preamble of claim 1.
  • the process for manufacturing single or double strands multifilament includes an assembly operation of several hundred or thousands of rods (for example a niobium alloy and titanium in a copper or nickel-copper alloy matrix) inside a machined cylindrical part.
  • the part is closed at its two ends by covers, or closing parts, of variable shape. These pieces of closure are generally fitted into the bore of the cylindrical part and welded thereto. We thus obtain a billet ready for spinning.
  • the billet thus formed must undergo a isostatic compacting operation, hot or cold, after closing the covers by welding. Because of radial stiffness of the closure parts, compaction of the cylindrical part is not produced everywhere so uniform. Cylinder areas close to parts areas are less compacted than the other parts of the billet and the cylindricity can be notably affected. The product obtained after extrusion will therefore include a lack of cohesion in these places.
  • the invention overcomes this drawback.
  • the covers are provided with grooves interior and exterior allowing radial deformation covers during isostatic compaction.
  • the invention therefore relates to a closure part of single or multifilament composite billet, the billet consisting of a tubular body filled with one or more multiple cylindrical components, each end of the body tubular being closed by said closure piece which has two main sides, a first side main closing the inside of the tubular body and a second main face opposite the first, characterized in that each of the two main faces is provided 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 to the axis of the tubular body when the closure piece closes the tubular body. This facilitates their realization.
  • the grooves are advantageously grooves straight.
  • the width of the grooves and the distance between them are preferably such that, after an operation of isostatic compaction of the billet, the grooves are are completely or partially closed by the material constituting the closure part. This provides a as homogeneous compaction as possible for the entire billet.
  • the closing part can be provided with a tube of pumping.
  • 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 metals conductors. Rods 1 are assembled in a body tubular 2 made of copper for example. Each end of the body tubular 2 is closed by a flat closing piece 3, 4. These parts 3 and 4 fit into the bore of the body tubular 2. The closing piece 3 is provided with a tube pumping 5 to make the air vacuum inside from the billet. The closure parts are welded to the tubular body according to their joint so as to make the Hermetic billet.
  • Figure 3 which is an enlarged view of part peripheral end of the billet, clearly shows the lack of homogeneity of compaction at this location.
  • the stems 1 are curved and a vacuum 6 remains between the rods and the tubular body 2.
  • Figure 4 shows the billet seen by the part of closure 4.
  • the circles in dashed lines represent the internal circumference of the tubular body 2 in the part center of the billet, this is circle 7, and in the end parts, this is circle 8.
  • a closing part 11, has two main faces 12 and 13.
  • the part 11 is flat and circular. It is represented in half-section.
  • Room 11 has a shoulder 14 which facilitates its fitting into the tubular body of the billet.
  • the face 13 is therefore opposite the ends stems.
  • the face 13 is provided with a circular groove 15 concentric and cross section.
  • Face 12 is provided a groove 16 similar in shape to groove 15 but surrounded by the latter. The depth of each groove is such that the grooves overlap. There are between they a separation crown 17.
  • another closing part 21, has two main faces 22 and 23.
  • the part 21 is flat and circular. It is represented in half-section. Room 21 has a shoulder 24 which facilitates its fitting into the tubular body of the billet.
  • Face 23 is therefore opposite the ends stems.
  • Face 23 is provided with a circular groove 25 concentric and cross section.
  • Face 22 is provided a groove 26 similar in shape to groove 25 but surrounded by the latter. The depth of each groove is such that the grooves overlap. There are between they a separation crown 27.
  • the part 21 is provided axially of a shank 28 which makes it possible to create an air vacuum in the billet.
  • the closure parts can be of the same metal or alloy than the tubular body or of a different nature.
  • a billet equipped with closure parts such as parts 11 and 21 allow the tubular body to deform uniformly both at the center and at its ends. This deformation makes the compaction homogeneous over the entire body length. 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 part peripheral end of the billet, shows well the homogeneity of compaction at this location.
  • Rods 1 are straight and no void remains between the rods and the tubular body 2.
  • the invention therefore makes it possible to obtain, after compaction, a better quality billet. This increases the yield overall billet after processing. Another advantage is that it is no longer necessary to carry out a machining rework of the tubular body, after the compacting operation, to allow extrusion. In effect, the tubular body being compacted so uniform, it can easily enter the container extrusion.
  • closure parts flat but the invention also applies to parts of closure 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)

Claims (5)

  1. Verschluß für einen aus mono- oder multifilamentärem Verbundwerkstoff bestehenden Knüppel, wobei der Knüppel aus einem mit einem oder mehreren zylindrischen Bestandteilen gefüllten röhrenförmigen Körper (2) besteht, wobei jedes Ende des röhrenförmigen Körpers mit dem Verschluß (11, 21) verschlossen ist, der zwei Hauptflächen aufweist, eine erste Hauptfläche (13, 23), die das Innere des röhrenförmigen Körpers abschließt, und eine zur ersten entgegengesetzte, zweite Hauptfläche (12, 22), dadurch gekennzeichnet, daß jede der beiden Hauptflächen mit einer in sich geschlossenen Rille (15, 16, 25, 26) versehen ist, wobei die eine der Rillen die andere umgibt, wobei die Tiefe der Rillen derart ist, daß sie sich überlappen.
  2. Verschluß nach Anspruch 1, dadurch gekennzeichnet, daß die Rillen (15, 16, 25, 26) kreisförmig und zur Achse des röhrenförmigen Körpers (2) konzentrisch sind, wenn der Verschluß den röhrenförmigen Körper verschließt.
  3. Verschluß nach Anspruch 1, dadurch gekennzeichnet, daß die Rillen (15, 16, 25, 26) gerade Rillen sind.
  4. Verschluß nach einem der Ansprüche 1 bis 3, dadurch gekennzeichnet, daß die Breite der Rillen und der sie trennende Anstand derart sind, daß nach einem Schritt der isostatischen Verdichtung des Knüppels die Rillen vollständig oder teilweise durch das den Verschluß bildende Material wieder verschlossen vorliegen.
  5. Verschluß nach einem der Ansprüche 1 bis 4, dadurch gekennzeichnet, daß er mit einem Pumprohr (28) versehen ist.
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 EP0622141A1 (de) 1994-11-02
EP0622141B1 true 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)

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
SE441336B (sv) * 1978-10-26 1985-09-30 Nyby Uddeholm Ab Kapsel for cylindriska pressemnen for extrudering
SE455383B (sv) * 1986-11-14 1988-07-11 Uddeholm Tooling Ab Sett vid konsolidering av metallpulver i en platkapsel samt smitt emne
US5137663A (en) * 1990-08-13 1992-08-11 Vital Force, Inc. Process and container for encapsulation of workpieces for high pressure processing
GB2257161A (en) * 1991-06-25 1993-01-06 Shell Int Research Process of forming a metal article.

Also Published As

Publication number Publication date
DE69409150T2 (de) 1998-07-16
FI100865B (fi) 1998-03-13
FI941953A (fi) 1994-10-30
DE69409150D1 (de) 1998-04-30
FR2704465B1 (fr) 1995-06-23
EP0622141A1 (de) 1994-11-02
FR2704465A1 (fr) 1994-11-04
FI941953A0 (fi) 1994-04-27

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