EP0622141B1 - Pièce de fermeture de billette composite mono- ou multifilamentaire - Google Patents
Pièce de fermeture de billette composite mono- ou multifilamentaire Download PDFInfo
- 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
Links
Images
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)
Description
- la figure 1 est une vue comprenant une demi-coupe et représentant une billette multifilamentaire selon l'art connu avant l'opération de compactage isostatique,
- les figures 2, 3 et 4 illustrent la billette représentée à la figure 1 après l'opération de compactage isostatique,
- les figures 5 et 6 représentant des pièces de fermeture de billette selon l'invention,
- les figures 7, 8 et 9 illustrent une billette équipée de pièces de fermeture selon l'invention, après l'opération de compactage isostatique.
Claims (5)
- Pièce de fermeture de billette composite mono-ou multifilamentaire, la billette étant constituée d'un corps tubulaire (2) rempli d'un ou de plusieurs composants cylindriques, chaque extrémité du corps tubulaire étant obturée par ladite pièce de fermeture (11, 21) qui présente deux faces principales, une première face principale (13, 23) fermant l'intérieur du corps tubulaire et une deuxième face principale (12, 22) opposée à la première, caractérisée en ce que chacune des deux faces principales est pourvue d'une rainure (15, 16, 25, 26) refermée sur elle-même, l'une des rainures entourant l'autre, la profondeur des rainures étant telle qu'elles se chevauchent.
- Pièce de fermeture selon la revendication 1, caractérisée en ce que les rainures (15, 16, 25, 26) sont circulaires et concentriques à l'axe du corps tubulaire (2) lorsque la pièce de fermeture obture le corps tubulaire.
- Pièce de fermeture selon la revendication 1, caractérisée en ce que les rainures (15, 16, 25, 26) sont des rainures droites.
- Pièce de fermeture selon l'une quelconque des revendications 1 à 3, caractérisée en ce que la largeur des rainures et la distance les séparant sont telles que, après une opération de compactage isostatique de la billette, les rainures se trouvent complètement ou partiellement rebouchées par la matière constituant la pièce de fermeture.
- Pièce de fermeture selon l'une quelconque des revendications 1 à 4, caractérisée en ce qu'elle est pourvue d'un tube de pompage (28).
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 (fr) | 1994-11-02 |
EP0622141B1 true EP0622141B1 (fr) | 1998-03-25 |
Family
ID=9446584
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP19940400893 Expired - Lifetime EP0622141B1 (fr) | 1993-04-29 | 1994-04-26 | Pièce de fermeture de billette composite mono- ou multifilamentaire |
Country Status (4)
Country | Link |
---|---|
EP (1) | EP0622141B1 (fr) |
DE (1) | DE69409150T2 (fr) |
FI (1) | FI100865B (fr) |
FR (1) | FR2704465B1 (fr) |
Family Cites Families (4)
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. |
-
1993
- 1993-04-29 FR FR9305090A patent/FR2704465B1/fr not_active Expired - Fee Related
-
1994
- 1994-04-26 EP EP19940400893 patent/EP0622141B1/fr not_active Expired - Lifetime
- 1994-04-26 DE DE1994609150 patent/DE69409150T2/de not_active Expired - Fee Related
- 1994-04-27 FI FI941953A patent/FI100865B/fi not_active IP Right Cessation
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 |
EP0622141A1 (fr) | 1994-11-02 |
FI941953A0 (fi) | 1994-04-27 |
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