EP0615794B1 - Procédé pour fabriquer une chambre de mandrin pour le filage en cascade de tubes et dispositif pour sa mise en oeuvre - Google Patents

Procédé pour fabriquer une chambre de mandrin pour le filage en cascade de tubes et dispositif pour sa mise en oeuvre Download PDF

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Publication number
EP0615794B1
EP0615794B1 EP94101369A EP94101369A EP0615794B1 EP 0615794 B1 EP0615794 B1 EP 0615794B1 EP 94101369 A EP94101369 A EP 94101369A EP 94101369 A EP94101369 A EP 94101369A EP 0615794 B1 EP0615794 B1 EP 0615794B1
Authority
EP
European Patent Office
Prior art keywords
unit
clamping
starting tube
mandrel
ironing
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
EP94101369A
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German (de)
English (en)
Other versions
EP0615794A1 (fr
Inventor
Helmut Pohl
Friedrich Ebertz
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.)
KM Europa Metal AG
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KM Europa Metal AG
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Filing date
Publication date
Application filed by KM Europa Metal AG filed Critical KM Europa Metal AG
Publication of EP0615794A1 publication Critical patent/EP0615794A1/fr
Application granted granted Critical
Publication of EP0615794B1 publication Critical patent/EP0615794B1/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
    • 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
    • B21C1/00—Manufacture of metal sheets, metal wire, metal rods, metal tubes by drawing
    • B21C1/16—Metal drawing by machines or apparatus in which the drawing action is effected by other means than drums, e.g. by a longitudinally-moved carriage pulling or pushing the work or stock for making metal sheets, bars, or tubes
    • B21C1/22—Metal drawing by machines or apparatus in which the drawing action is effected by other means than drums, e.g. by a longitudinally-moved carriage pulling or pushing the work or stock for making metal sheets, bars, or tubes specially adapted for making tubular articles
    • B21C1/24—Metal drawing by machines or apparatus in which the drawing action is effected by other means than drums, e.g. by a longitudinally-moved carriage pulling or pushing the work or stock for making metal sheets, bars, or tubes specially adapted for making tubular articles by means of mandrels

Definitions

  • the invention relates on the one hand to a method for producing at least two drawing plugs, on the one hand by means of a drawing bar and on the other hand by a plug chamber delimited on the outer circumference of an outlet pipe when cascading pipes made of non-ferrous metals or their alloys.
  • the invention is directed to an apparatus for performing the method.
  • the starting pipe can be a press pipe or a rolled or a longitudinally welded pipe.
  • the outlet pipe is moved in several passes through drawing rings that are spaced apart from one another in the opening cross section, the drawing plugs of different sizes then each forming the corresponding abutment.
  • the wall thickness of the outlet pipe having a certain outside diameter must be dimensioned such that even taking into account manufacturing tolerances of the primary material such as uneven outside diameter, uneven wall thickness and ovality, the smallest pulling plug in diameter picks up until the takeover Abutment function can move freely in the plug chamber. If this is not taken care of, the pulling plug can be clamped in and the outlet pipe can be torn off.
  • the invention has for its object to improve this method and also to provide a suitable device for performing the method that more material can be used per output tube and consequently more finished tube can be achieved without sacrificing quality is.
  • a plug chamber with a wall thickness is created immediately behind the drawing bar, which is dimensioned smaller than the wall thickness of the rest of the starting pipe, with the pipe outside diameter remaining the same.
  • the inside diameter of the plug chamber taking into account the diameter reductions during the drawing process and the resulting increase in wall thickness, has been brought to an amount which guarantees the freedom of movement of even the smallest diameter drawing plug up to the point in time at which this drawing plug interacts with the drawing ring assigned to it.
  • an outlet pipe that can be dimensioned larger in wall thickness than the outlet pipe previously used and in which the inevitable manufacturing tolerances in the outside diameter, in the wall thickness and in ovality with regard to the freedom of movement of the play no role in the diameter of the smallest drawing plug.
  • an extension of the outlet pipe in the area of the plug chamber is associated with the stretching of the plug chamber by approximately 20%. This reduces the length of the pipe section required to generate the drawing die. Also the diameter of the Drawbar kept smaller. As a result, the waste of material caused by the drawbar can advantageously be reduced.
  • a clamping and denting unit on the one hand and a mandrel and ironing unit on the other are assigned to one another in a function-optimized manner.
  • the clamping and denting unit has radially movable clamping jaws and Dell tappets. With the help of the clamping jaws, an exit pipe can be fixed locally, so that, using the mandrel forming part of the mandrel and ironing unit, a length section protruding beyond the clamping and dent unit in the direction of passage of the exit pipe can be thorned out in such a way that both the inside diameter and this area as well as enlarge the outside diameter.
  • the outer diameter of the thickened length section is stretched to the original outer diameter of the initial tube with the mandrel remaining in the initial tube.
  • the clamping and denting unit and the one assigned to it can be used Dell plunger dents are generated on the outlet pipe, which forms a limitation of the subsequent plug chamber. After the drawing plugs have been introduced into the plug chamber, the draw bar is ultimately formed on the free end of the outlet pipe.
  • the embodiment according to the features of claim 3 provides two mechanically coupled hydraulically actuatable cylinders which have piston rods which can be extended in opposite directions.
  • the cylinder housings are fixed in place.
  • the piston rod of the mandrel cylinder which can be extended in the direction of the exit pipe or the clamping and denting unit, is connected to the mandrel, which serves to widen the end section of the exit pipe and serves as an abutment for the ironing ring when this end section is stretched.
  • the piston rod of the ironing cylinder which can be extended in the other direction, is connected to the ironing ring via a linkage which runs parallel to the longitudinal axes of the cylinders.
  • the ironing ring is arranged at the free end of the rod.
  • the outlet pipe is first moved beyond the clamping and denting unit with a length section that takes into account the axial extension of the plug chamber and the drawbar. Then the clamping jaws are placed on the outlet pipe and the outlet pipe is thus fixed locally.
  • the starting position of the mandrel and ironing unit is such that the mandrel cylinder is retracted and the ironing cylinder is extended. After fixing the output pipe, the ironing cylinder is then in the direction of entry acted upon, so that the ironing ring slides along the end section of the output tube projecting beyond the clamping and denting unit in the direction of passage. After reaching the end position, the mandrel cylinder is loaded in the direction of extension and the mandrel is pushed into the outlet tube, increasing the inside and outside diameter. When the mandrel has reached its end position, the ironing cylinder is loaded in the direction of extension and the outer diameter of the lengthened mandrel is stretched to the original dimension. The mandrel remains in the exit tube.
  • the mandrel cylinder is also loaded in the entry direction and the mandrel is pulled out of the exit tube. Then the Dell tappets are moved radially inwards and two dents are created in 180 ° offset. Ultimately, the drawing die is formed on the free end of the length section provided with a reduced wall thickness, if the pulling plugs have previously been inserted into the plug chamber produced by the thickening.
  • the drawing plugs 2, 3, 4 required to carry out the method are, as can be seen in FIG. 9, introduced loosely, ie freely movably, into a plug chamber 12, which is located at the front end in the direction of passage DR of the outlet pipe 1 between a drawing bar 13 and two, the cross-section of the output tube 1 dimples 14 is located.
  • a device 15 is used to produce this plug chamber 12, as can be seen in more detail in FIGS. 2 to 6.
  • This device 15 (see FIG. 2) comprises a clamping and denting unit 16 for the outlet tube 1 and a mandrel and ironing unit 17 which is arranged coaxially with the clamping and denting unit 16 and can be moved relatively to it.
  • the clamping and denting unit 16 is provided with radially movable clamping jaws 18, which serve for the local fixation of the outlet tube 1. With the jaws 18 brackets 19 are connected, which carry Dellst Congressel 20 in a diametrical offset, which are radially displaceable in the direction of the output tube 1.
  • the mandrel and ironing unit 17 comprises two hydraulically actuated cylinders 21, 22, the housings 23, 24 of which are fixed locally and coupled to one another on the end face.
  • the mandrel cylinder 21 which is closer to the clamping and denting unit 16 has a piston rod 25 which can be extended in the direction of the clamping and denting unit 16 and which carries a mandrel 26.
  • the other ironing cylinder 22 has a piston rod 27 which can be extended in the direction of passage DR of the output tube 1.
  • a crossbar 28 is fastened to the free end of the piston rod 27.
  • the cross member 28 is operatively connected via a linkage 29 running parallel to the cylinders 21, 22 to an ironing ring 30 which, in the starting position of the device 15 according to FIG. 2, is located approximately at the free end of the mandrel 26.
  • the outlet pipe 1 with an outer diameter AD of 80 mm and a wall thickness D of 5 mm is first moved so far through the clamping and denting unit 16 that the clamping and Dent unit 16 protrudes a length section 31, which enables the plug chamber 12 and the draw bar 13 to be manufactured. If this position is reached, the output pipe 1 is fixed locally with the help of the clamping jaws 18.
  • the ironing cylinder 22 is now acted upon in the entry direction.
  • the ironing ring 30 slides along the outer circumference of the end section 31 of the output tube 1 to be formed up to the position lying on the end face of the clamping jaws 18.
  • the mandrel cylinder 21 is acted upon in the extending direction, so that the mandrel 26 penetrates into the approximately 365 mm long end section 31 and, as can be seen in FIG. 7, both the inside diameter ID of 70 mm and the outside diameter AD from 80 mm of the output pipe 1 to the inside diameter ID1 of 72 mm and the outside diameter AD1 of 82 mm.
  • the ironing ring 30 is moved in the direction of travel DR of the output pipe 1, with the mandrel 26 remaining in the end section 31 serving as an abutment, the outer diameter AD1 of the end section 31 as shown in FIG. 8 to the original outer diameter OD reduced by 80 mm.
  • the inner diameter ID1 expanded to 72 mm, remains.
  • the end section 31 has been lengthened from approximately 365 mm to approximately 450 mm due to the stretching from the initial length.
  • the mandrel and ironing unit 17 is now again in the starting position according to FIG. 6, as shown in FIG. 6. This now allows two diametrically opposite dents 14 (FIG. 9) to be moved by radially inward movement of the Dell tappets 20 according to FIG To produce the outer circumference of the outlet pipe 1, so that herewith also reduces its inner cross section and one of the boundaries of the plug chamber 12 is thereby formed.
  • the pull plugs 2, 3, 4 are introduced into the plug chamber 12 and then the draw bar 13 is molded on.
  • the output pipe 1 is thus prepared for a triple pull through the drawing cascade 11.
  • the pull plug 2 reaches the area of the pull ring 5, the dents 14 become effective and cause the pull plug 2 to move into the pull ring 5 up to the pull position. Now the wall thickness of the outlet pipe 1 is also reduced. This situation is illustrated in FIG. 11. It can be seen here that the drawing plugs 3, 4 are still in the area of the plug chamber 12 whose wall thickness has not yet been reduced. Immediately behind the pull plug 3, however, the area of the outlet pipe 1 begins with a reduced wall thickness. Here, two further dents 14 are then also placed at a distance from the drawing plug 3 in order to limit the displacement of the drawing plug 3 in the plug chamber 12 during the following train.

Landscapes

  • Mechanical Engineering (AREA)
  • Engineering & Computer Science (AREA)
  • Metal Extraction Processes (AREA)
  • Forging (AREA)
  • Chemical Vapour Deposition (AREA)
  • Vaporization, Distillation, Condensation, Sublimation, And Cold Traps (AREA)
  • Superconductors And Manufacturing Methods Therefor (AREA)
  • Solid-Sorbent Or Filter-Aiding Compositions (AREA)
  • Shaping By String And By Release Of Stress In Plastics And The Like (AREA)
  • Making Paper Articles (AREA)
  • Meat, Egg Or Seafood Products (AREA)
  • Shaping Of Tube Ends By Bending Or Straightening (AREA)
  • Shaping Metal By Deep-Drawing, Or The Like (AREA)

Claims (3)

  1. Procédé de réalisation d'une chambre de mandrinage (12) accueillant au moins deux mandrins flottants (2, 3, 4) et délimitée d'un côté par une soie d'étirage, de l'autre côté par une déformation en creux (14) pratiquée à la périphérie d'un tube initial (1), dans le cadre d'un étirage en cascade du tube (1) en métal ou alliage non ferreux,
    caractérisé en ce que
    l'extrémité (31) du tube initial (1) située en avant par rapport à son sens de passage (DR) est d'abord mandrinée avec augmentation de son diamètre interne (ID) et de son diamètre externe (AD), le nouveau diamètre externe (AD1) de cette partie extrême (31) mandrinée étant ensuite ramenée à sa valeur d'origine (AD) par un allongement de la partie (31) effectué par étirage, cette opération étant suivie de la réalisation de la déformation en creux (14), de l'introduction des mandrins d'étirage (2, 3, 4) dans la chambre (12) et de la formation de la soie d'étirage (13).
  2. Dispositif pour la mise en oeuvre de ce procédé selon la revendication 1, comprenant une unité de serrage et de déformation en creux (16) du tube initial (1) ainsi qu'une unité de mandrinage et d'étirage (17) coaxiale à l'unité (16) et mobile par rapport à elle,
    caractérisé en ce que
    l'unité (16) dispose de mors de serrage (18) mobiles radialement par rapport au tube (1) tandis que l'unité (17) est équipée d'une broche de mandrinage (26) mobile selon l'axe longitudinal du tube (1) ainsi que d'une lunette du banc à étirer (30) mobile, située à la périphérie de la broche (26) et de la partie externe (31) du tube (1) dépassant frontalement de l'unité (16).
  3. Dispositif selon la revendication 2,
    caractérisé en ce que
    l'unité (17) de mandrinage et d'étirage (17) comprend deux vérins hydrauliques associés entre eux et disposés selon l'axe longitudinal du tube (1), leurs tiges de piston (25, 26) sortant dans des directions opposées, celle (25) sortant en direction de l'unité (16) portant la broche de mandrinage (26) tandis que l'autre tige de piston (27) est reliée à la lunette du banc à étirer (30) par l'intermédiaire d'une tringle (29) parallèle aux vérins (21, 22).
EP94101369A 1993-02-27 1994-01-31 Procédé pour fabriquer une chambre de mandrin pour le filage en cascade de tubes et dispositif pour sa mise en oeuvre Expired - Lifetime EP0615794B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE4306181 1993-02-27
DE4306181A DE4306181A1 (de) 1993-02-27 1993-02-27 Verfahren zur Herstellung einer Stopfenkammer beim Kaskadenziehen von Rohren und Vorrichtung zur Durchführung des Verfahrens

Publications (2)

Publication Number Publication Date
EP0615794A1 EP0615794A1 (fr) 1994-09-21
EP0615794B1 true EP0615794B1 (fr) 1996-12-04

Family

ID=6481546

Family Applications (1)

Application Number Title Priority Date Filing Date
EP94101369A Expired - Lifetime EP0615794B1 (fr) 1993-02-27 1994-01-31 Procédé pour fabriquer une chambre de mandrin pour le filage en cascade de tubes et dispositif pour sa mise en oeuvre

Country Status (13)

Country Link
US (1) US5467631A (fr)
EP (1) EP0615794B1 (fr)
JP (1) JP3313870B2 (fr)
AT (1) ATE145843T1 (fr)
AU (1) AU664943B2 (fr)
BR (1) BR9400688A (fr)
CA (1) CA2115858C (fr)
DE (2) DE4306181A1 (fr)
ES (1) ES2095688T3 (fr)
FI (1) FI108005B (fr)
GR (1) GR3021911T3 (fr)
MX (1) MX9401270A (fr)
ZA (1) ZA941245B (fr)

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2759309B1 (fr) * 1997-02-07 1999-03-19 Le Bronze Ind Sa Tubes metalliques et procede et installation pour les fabriquer
US9676016B2 (en) 2013-09-23 2017-06-13 Manchester Copper Products, Llc Systems and methods for drawing materials
EP3258260B1 (fr) 2016-06-16 2020-01-15 Lake Region Manufacturing, Inc. Colonne composite destinée à être utilisée dans une chromatographie liquide haute pression

Family Cites Families (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US307993A (en) * 1884-11-11 sharp
US2535339A (en) * 1949-03-07 1950-12-26 Bundy Tubing Co Device for sizing the ends of tubing
US3820230A (en) * 1970-07-09 1974-06-28 United States Steel Corp Method of starting tubes through drawing die
DE2623385C2 (de) * 1976-05-25 1984-03-15 Kabel- und Metallwerke Gutehoffnungshütte AG, 3000 Hannover Verfahren zum Einbringen von Dornen in eine zu ziehende Rohrlänge
GB2007569A (en) * 1977-11-11 1979-05-23 Accles & Pollock Ltd Method of Forming a Counterbore in the End of a Tube
IT1100944B (it) * 1977-11-11 1985-09-28 Accles & Pollock Ltd Procedimento di formazione di un allargamento nell'estremita' di un tubo
JPS5956930A (ja) * 1982-09-16 1984-04-02 Kobe Steel Ltd 段付チユ−ブの製造方法及びその製造装置
EP0353324B1 (fr) * 1988-08-03 1992-06-17 Schumag Aktiengesellschaft Procédé d'étirage droit de tubes et dispositif à cet effet

Also Published As

Publication number Publication date
CA2115858A1 (fr) 1994-08-28
EP0615794A1 (fr) 1994-09-21
US5467631A (en) 1995-11-21
FI940910A (fi) 1994-08-28
DE59401175D1 (de) 1997-01-16
JP3313870B2 (ja) 2002-08-12
JPH06315715A (ja) 1994-11-15
ES2095688T3 (es) 1997-02-16
AU664943B2 (en) 1995-12-07
AU5640594A (en) 1994-09-01
FI940910A0 (fi) 1994-02-25
DE4306181A1 (de) 1994-09-01
MX9401270A (es) 1994-08-31
CA2115858C (fr) 1998-07-14
ZA941245B (en) 1995-01-24
FI108005B (fi) 2001-11-15
GR3021911T3 (en) 1997-03-31
BR9400688A (pt) 1994-09-27
ATE145843T1 (de) 1996-12-15

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