EP0692322B1 - Procédé et appareil de façonnage de tubes métalliques en corps cÔniques ou effilés - Google Patents

Procédé et appareil de façonnage de tubes métalliques en corps cÔniques ou effilés Download PDF

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Publication number
EP0692322B1
EP0692322B1 EP95109489A EP95109489A EP0692322B1 EP 0692322 B1 EP0692322 B1 EP 0692322B1 EP 95109489 A EP95109489 A EP 95109489A EP 95109489 A EP95109489 A EP 95109489A EP 0692322 B1 EP0692322 B1 EP 0692322B1
Authority
EP
European Patent Office
Prior art keywords
blank
tools
section
cross
shaping
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
EP95109489A
Other languages
German (de)
English (en)
Other versions
EP0692322A3 (fr
EP0692322A2 (fr
Inventor
Peter Weichhart
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.)
NEDAL ALUMINIUM BV
Original Assignee
Contipole Aluminium-Verarbeitungsgesellschaft Mbh
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 Contipole Aluminium-Verarbeitungsgesellschaft Mbh filed Critical Contipole Aluminium-Verarbeitungsgesellschaft Mbh
Publication of EP0692322A2 publication Critical patent/EP0692322A2/fr
Publication of EP0692322A3 publication Critical patent/EP0692322A3/fr
Application granted granted Critical
Publication of EP0692322B1 publication Critical patent/EP0692322B1/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
    • B21C37/00—Manufacture of metal sheets, bars, wire, tubes or like semi-manufactured products, not otherwise provided for; Manufacture of tubes of special shape
    • B21C37/06—Manufacture of metal sheets, bars, wire, tubes or like semi-manufactured products, not otherwise provided for; Manufacture of tubes of special shape of tubes or metal hoses; Combined procedures for making tubes, e.g. for making multi-wall tubes
    • B21C37/15—Making tubes of special shape; Making tube fittings
    • B21C37/16—Making tubes with varying diameter in longitudinal direction
    • B21C37/18—Making tubes with varying diameter in longitudinal direction conical tubes
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21B—ROLLING OF METAL
    • B21B17/00—Tube-rolling by rollers of which the axes are arranged essentially perpendicular to the axis of the work, e.g. "axial" tube-rolling
    • B21B17/14—Tube-rolling by rollers of which the axes are arranged essentially perpendicular to the axis of the work, e.g. "axial" tube-rolling without mandrel, e.g. stretch-reducing mills
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21B—ROLLING OF METAL
    • B21B37/00—Control devices or methods specially adapted for metal-rolling mills or the work produced thereby
    • B21B37/16—Control of thickness, width, diameter or other transverse dimensions
    • B21B37/24—Automatic variation of thickness according to a predetermined programme
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21B—ROLLING OF METAL
    • B21B37/00—Control devices or methods specially adapted for metal-rolling mills or the work produced thereby
    • B21B37/46—Roll speed or drive motor control

Definitions

  • the invention relates to a method for deforming metal pipes to conical or tapered bodies, in which the metal tube forming the blank is paired deformed cylindrical tools on the outside which is one on their work surface each in cross section corresponding to the halved cross-sectional shape of the blank Have groove that is conical in the circumferential direction are shaped, the blank at both ends under one corresponding biasing force clamped in its axial direction is and the roller-shaped tools along the Move blank, (see e.g. EP-A-0381116)
  • this invention relates to a device for Performing this procedure.
  • Metal pipes with a circular cross section are particularly popular for masts, light masts, flag poles or the like to be conical Bodies reshaped.
  • the tools and / or the Blank during the drawing process with additional shaking movements relative to each other in the axial direction of the blank to act upon.
  • the blank can also be used a vibrating device in its axis in a vibrating motion are displaced, which causes the material the flow behavior of the blank during the forming process improved so that even high quality metals and metal alloys, that usually only transform badly can also be processed with this method.
  • each drawing operation of a single deformation stage corresponds.
  • This gradual deformation process starts near that section of the deforming blank, which at the end of the deformation the should have the smallest cross-section.
  • the method according to the invention is carried out as follows:
  • the roller-shaped drawing tools are moved in the open state in the vicinity of the point which should have the smallest cross section at the end of the deformation, and then closed so far that they just touch the surface of the blank.
  • the first stage of the drawing process begins, whereby the blank and the drawing tool are moved relative to each other, and the roller-shaped tools are slowly closed against their normal rolling direction on the blank by a fraction of their total circumference, the narrowest opening being reached at that point of the blank that should later have the smallest cross-section.
  • the roller-shaped tools are again completely moved apart, and moved to a location that is a distance away from the point at which the last drawing process began, so that the tools are now a further distance up to now run over undeformed blank.
  • the roller-shaped tools are now moved together again to the undeformed diameter of the blank, then a drawing process begins again, in which the roller-shaped tools are moved against the rolling direction on the blank. This process can be continued continuously until the point of the blank that is later to have the smallest cross section is reached. When this point is reached, the roller-shaped tools have been moved together by a larger fraction of their total circumference. This completes another stage of the conification process.
  • the tools are moved apart again by rotation and moved to a position on the still undeformed piece of the blank that is a certain distance from the last start of deformation.
  • the rest of the process is the same. This process is repeated until the blank or the parts of the blank to be butted are completely butted.
  • the present invention makes one significant better surface quality of the finished workpiece achieved in that against the rolling direction rotating roller-shaped forming tools an incline of opposite conical work surfaces forming circumferential groove have the slope of the blank to be manufactured. Thereby the forming is not rolling the blank, but a reshaping similar to pulling.
  • the invention Device a device for generating a shaking movement between the blank and the rollers in the axial direction of the blank. Through additional shaking movements of the blank during the forming process, namely Flow of material improved during forming. Thereby can also be difficult to form materials with this device according to the invention are formed.
  • the invention can by a vibrating device, which over the blank or the Forming tool dynamic energy in the deformation zone initiates, which improves the flow of the material will be trained.
  • the collet 6 is around one with the longitudinal axis of the blank aligned axis 7 rotatably supported, one through the arrow 8 in Figure 1 symbolized rotary drive for the Collet is provided.
  • the slope of the work surface on the circumference of the tools is not like the slope of the rolling process Blank, but opposite to it, which makes the blank a transformation similar to the technology of drawing experiences.
  • the drive 10 is preferably a speed-controllable one Motor 14 with a gear 15 so that steplessly control the speed of rotation of the tools leaves.
  • the carriage 12 is opposite the collet 6 by one Traction drive 13 slidable, which is preferred a positive drive, such as a chain hoist or can be a rack and pinion drive.
  • a positive drive such as a chain hoist or can be a rack and pinion drive.
  • FIG. 2 shows a pair of spur gears 23, 24, by means of which the tools 2, 3 into one another opposite rotation.
  • the gradual deformation process starts close to that Section of the blank to be deformed, which on End of the deformation have the smallest cross section should.
  • the roller-shaped drawing tools are opened Condition moved to this point, and then closed as far as that they just touch the surface of the blank.
  • the first stage of the drawing process begins, whereby blank and tools are moved relative to each other, and the cylindrical tools slowly counter to their normal Unwind direction on the blank by a fraction of its total circumference be closed with the narrowest opening the point of the blank that is reached later should have the smallest cross-section.
  • the tools are completely apart, and on move a place that is a bit away from the Point where the last drawing process started, so that the roller-shaped tools are now another piece so far run over undeformed blank.
  • the grooves 5 in the roller-shaped Tools 2, 3 can be any cross-section processing of blanks. With round blanks, as in the described embodiment, the grooves in Cross section centric or concentric semicircular executed. When processing blanks with polygonal Cross-section, the grooves have a cross-section which half of the polygon of the cross section of the blanks correspond.
  • the collet 6 is then in discrete Steps rotatable, the steps according to the present Angular relationships of the blank can be determined.
  • a preferred embodiment for the development of the invention consists of an arrangement of a vibrating device ( Figure 4) on the collet of the blank and / or on the Stretching device.
  • the vibration device consists in the preferred embodiment from an eccentrically mounted, vibration generating device or from pneumatic, hydraulic or magnetic devices.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Shaping Metal By Deep-Drawing, Or The Like (AREA)
  • Heat Treatment Of Articles (AREA)
  • Forging (AREA)
  • Shaping Of Tube Ends By Bending Or Straightening (AREA)
  • Metal Extraction Processes (AREA)

Claims (8)

  1. Procédé de formage de tubes métalliques en corps coniques, dans lequel un tube métallique est déformé coniquement par une paire d'outils (2, 3) en forme de rouleaux, agissant sur le côté extérieur du tube, les outils (2, 3) présentent chacun, sur leur surface de travail, une gorge (5) dont la section correspond à la moitié de la forme de la section de l'ébauche, laquelle gorge a une forme conique dans la direction périphérique et le tube cylindrique est étiré coniquement par déplacement des outils (2, 3) le long de l'ébauche en même temps que la section de formage est modifiée par les outils (2, 3), caractérisé en ce que pendant la déformation, l'ébauche est étirée par une force supplémentaire, agissant axialement sur toute l'ébauche et les outils (2, 3) sont déplacés sur l'ébauche dans le sens contraire au sens du roulement, pour réduire la section, et les gorges (5) des outils (2, 3) présentent une pente opposée à la pente recherchée pour l'ébauche.
  2. Procédé selon la revendication 1, caractérisé en ce que la pente du cône produit est commandée par la vitesse du mouvement d'avance de l'outil (mouvement de rotation) par rapport à la vitesse du déplacement longitudinal de l'outil.
  3. Procédé selon la revendication 1 ou 2, caractérisé en ce que les outils et/ou l'ébauche sont soumis, pendant l'étirage, à des mouvements de secousses supplémentaires les uns par rapport aux autres, dans la direction axiale de l'ébauche.
  4. Procédé selon les revendications 1 à 3, caractérisé en ce que les opérations d'étirage s'effectuent en plusieurs étapes, chaque opération d'étirage correspondant à une étape individuelle de formage et l'opération de formage par étapes commençant à proximité de la partie de l'ébauche à déformer qui doit présenter la plus petite section à la fin du formage.
  5. Procédé selon la revendication 4, caractérisé en ce que les outils d'étirage en forme de rouleaux, à l'état ouvert, sont déplacés à proximité de l'emplacement qui doit présenter la plus petite section à la fin du formage et sont ensuite fermés, jusqu'à ce qu'ils touchent tout juste la surface de l'ébauche, et commence ensuite la première étape de l'opération d'étirage, l'ébauche et les outils (2, 3) étant déplacés l'une par rapport aux autres et les outils en forme de rouleaux étant approchés lentement de l'ébauche dans le sens contraire à leur sens normal de roulement sur une partie de leur périmètre total, l'ouverture la plus étroite étant atteinte au point de l'ébauche qui devra présenter plus tard la section la plus réduite, et à la fin de cette première étape de l'opération de formage, les outils en forme de rouleaux sont à nouveau totalement écartés l'un de l'autre, et sont déplacés en un point qui est un peu éloigné, dans le sens contraire au sens d'étirage, du point auquel a commencé le dernier processus d'étirage, de sorte que les outils passent sur une autre partie de l'ébauche non encore déformée, et les outils en forme de rouleaux sont maintenant à nouveau réunis jusqu'au diamètre non déformé de l'ébauche, un processus d'étirage commençant à nouveau au cours duquel les outils en forme de rouleaux sont approchés de l'ébauche, dans le sens contraire à leur sens de roulement, le processus étant poursuivi en continu jusqu'à ce que soit atteint le point de l'ébauche qui doit présenter plus tard la section la plus réduite, lorsque ce point est atteint, les outils en forme de rouleaux sont rapprochés d'une partie assez grande de leur périmètre total, et une autre étape du processus de réalisation d'un cône est ainsi terminée, les outils sont à nouveau écartés par rotation, et déplacés en un point éloigné d'une distance déterminée du dernier début de formage, sur la partie non encore déformée de l'ébauche, cette séquence se renouvelant jusqu'à ce que l'ébauche soit totalement transformée en cône.
  6. Procédé selon la revendications 4 ou 5, caractérisé en ce qu'on fait tourner l'ébauche entre les différentes opérations d'étirage.
  7. Dispositif pour la mise en oeuvre du procédé selon l'une des revendications 1 à 5, comportant une paire de rouleaux (2, 3) entraínés en rotation qui présentent chacun sur leur surface de travail (4) venant en prise avec l'ébauche, une gorge (5) dont la section correspond à la moitié de la forme de la section de l'ébauche qui a une forme conique dans la direction périphérique des rouleaux (2, 3) et comportant une pince de serrage (6) pour maintenir l'ébauche, un dispositif (9) étant prévu pour produire un déplacement relatif entre les rouleaux (2, 3) et l'ébauche, caractérisé en ce que les gorges (5) des rouleaux (2, 3) présentent une pente opposée à la pente recherchée pour l'ébauche et en ce qu'il est prévu en supplément un dispositif (30, 31, 32, 34) qui agit à l'extrémité de l'ébauche, opposée à la pince de serrage (6) et l'ébauche est soumise à une force agissant axialement pendant la transformation.
  8. Dispositif selon la revendication 7, caractérisé en ce qu'un dispositif destiné à produire un mouvement de secousses entre l'ébauche et les rouleaux (2, 3) dans la direction axiale de l'ébauche, est prévu.
EP95109489A 1994-06-24 1995-06-20 Procédé et appareil de façonnage de tubes métalliques en corps cÔniques ou effilés Expired - Lifetime EP0692322B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE4421683 1994-06-24
DE4421683A DE4421683A1 (de) 1994-06-24 1994-06-24 Verfahren und Vorrichtung zum Verformen von Metallrohren zu konusförmigen oder sich verjüngenden Körpern

Publications (3)

Publication Number Publication Date
EP0692322A2 EP0692322A2 (fr) 1996-01-17
EP0692322A3 EP0692322A3 (fr) 1996-05-29
EP0692322B1 true EP0692322B1 (fr) 1999-10-20

Family

ID=6521132

Family Applications (1)

Application Number Title Priority Date Filing Date
EP95109489A Expired - Lifetime EP0692322B1 (fr) 1994-06-24 1995-06-20 Procédé et appareil de façonnage de tubes métalliques en corps cÔniques ou effilés

Country Status (3)

Country Link
EP (1) EP0692322B1 (fr)
AT (1) ATE185719T1 (fr)
DE (2) DE4421683A1 (fr)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102011007082A1 (de) * 2011-04-08 2012-10-11 Bos Gmbh & Co. Kg Wickelwelle eines Rollosystems und Rollosystem mit Wickelwelle

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB431135A (en) * 1933-09-29 1935-07-01 Fritz Gross Improvements in method of and means for making conical tubular bodies
US3019678A (en) 1958-07-21 1962-02-06 Fiell Cecil K Le Tube tapering machine
GB2030819A (en) * 1978-09-07 1980-04-10 Young M Improvements in or relating to oscillatory forming equipment
DE3903132A1 (de) * 1989-02-02 1990-08-09 Weichhart Gmbh Verfahren und vorrichtung zum verformen von metallrohren zu konusfoermigen oder sich verjuengenden koerpern

Also Published As

Publication number Publication date
EP0692322A3 (fr) 1996-05-29
EP0692322A2 (fr) 1996-01-17
DE59507079D1 (de) 1999-11-25
ATE185719T1 (de) 1999-11-15
DE4421683A1 (de) 1996-01-04

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