EP3423205B1 - Dispositif et procédé de formage d'une pièce tubulaire - Google Patents

Dispositif et procédé de formage d'une pièce tubulaire Download PDF

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Publication number
EP3423205B1
EP3423205B1 EP16822385.7A EP16822385A EP3423205B1 EP 3423205 B1 EP3423205 B1 EP 3423205B1 EP 16822385 A EP16822385 A EP 16822385A EP 3423205 B1 EP3423205 B1 EP 3423205B1
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EP
European Patent Office
Prior art keywords
mandrel
workpiece
tubular workpiece
tailstock
forming
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.)
Active
Application number
EP16822385.7A
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German (de)
English (en)
Other versions
EP3423205A1 (fr
Inventor
Benedikt Nillies
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.)
Leifeld Metal Spinning GmbH
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Leifeld Metal Spinning GmbH
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Publication date
Application filed by Leifeld Metal Spinning GmbH filed Critical Leifeld Metal Spinning GmbH
Publication of EP3423205A1 publication Critical patent/EP3423205A1/fr
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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21D—WORKING OR PROCESSING OF SHEET METAL OR METAL TUBES, RODS OR PROFILES WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21D22/00—Shaping without cutting, by stamping, spinning, or deep-drawing
    • B21D22/14—Spinning
    • B21D22/16—Spinning over shaping mandrels or formers
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21D—WORKING OR PROCESSING OF SHEET METAL OR METAL TUBES, RODS OR PROFILES WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21D41/00—Application of procedures in order to alter the diameter of tube ends
    • B21D41/04—Reducing; Closing

Definitions

  • the invention relates to a device for forming a tubular workpiece according to the preamble of claim 1 and a method according to the preamble of claim 12.
  • the device comprises a machine bed, a headstock mounted on the machine bed, a spinning mandrel mounted on the headstock for receiving the tubular workpiece a chuck mounted on the headstock for chucking a first axial end of the tubular workpiece and at least one forming roller for forming the tubular workpiece around the spinning mandrel.
  • a generic device is for example from the EP 2 210 682 A1 known.
  • the invention has for its object to provide an apparatus and a method for forming a tubular workpiece, which allow a particularly precise and efficient forming.
  • the device according to the invention is characterized in that a tailstock is provided on which a receptacle for receiving and holding the second axial end of the tubular workpiece is provided, wherein the tailstock is mounted axially displaceably on the machine bed.
  • a basic idea of the invention can be seen in centering the axial end of the workpiece lying opposite the chuck on the headstock in a preferably sleeve-shaped or trough-shaped receptacle in order to ensure precise mounting of the workpiece.
  • the receptacle partially or completely encloses the axial end of the workpiece and holds the workpiece precisely in the axis of the spinning mandrel.
  • the receptacle has a second chuck for clamping the second axial end of the tubular workpiece.
  • the workpiece is thus clamped in this case at both axial ends in each case a chuck and held reliably in this way.
  • the second chuck is rotatably mounted on the tailstock and set in rotation by the workpiece.
  • the chuck is thus preferably freely stored or storable, so that a rotation of the chuck can be generated by a rotation of the workpiece.
  • the workpiece is reliably centered in the axis of the spinning mandrel by the second chuck. At the same time a free rotation of the clamped workpiece is ensured by the rotatable mounting of the second chuck.
  • a rotary drive is provided for rotationally driving the second chuck.
  • a torque into the second axial end of the workpiece torsion-free ends can be formed.
  • the chuck can basically also be formed by a driver.
  • the tailstock is mounted axially displaceably on the machine bed.
  • the tailstock is stored with the chuck axially free on the machine bed or storable, so that by axial material flow of the workpiece axial displacement of the tailstock can be effected with the chuck.
  • the tailstock can thus be moved freely preferably by an elongation of the workpiece.
  • the deformation of the workpiece can be advantageously assisted by providing an axial drive for the axial movement of the tailstock together with the second chuck, in particular for pulling the workpiece.
  • the material By supporting the axial material flow of the workpiece by a tensile force, the material undergoes tensile forces during the forming, on the one hand the Facilitate material flow and on the other hand achieve a high straightness of the workpiece.
  • a mandrel for receiving deformed material of the tubular workpiece is provided on the tailstock.
  • the mandrel may in particular be provided to catch and / or guide material which flows axially outward over the spinning mandrel.
  • the additional collecting mandrel also increases the straightness of the workpiece to be formed.
  • a further preferred embodiment of the invention is that the spinning mandrel has an end-side mandrel portion, which is rotatably mounted on a mandrel rod, and that an axially and / or radially movable support means is provided for supporting the mandrel rod.
  • the mandrel bar can in particular non-rotating, so rotationally fixed, be mounted on the headstock.
  • the deformation of the workpiece is preferably carried out in the region of the rotatably mounted on the mandrel rod end-side mandrel portion, which forms the actual forming mandrel.
  • the workpiece can be moved in the axial direction relative to the forming mandrel to be formed between forming mandrel and forming roller.
  • the forming mandrel that is to say the end-side mandrel section, in this case preferably does not correspond to the internal shape of the workpiece to be reshaped. Rather, the inner shape of the workpiece is determined in each case by the relative position of forming mandrel and forming roller to each other.
  • the workpiece can be moved in the axial direction with respect to an axially fixed mandrel and an axially fixed forming roller.
  • the mandrel bar can have a large axial length in comparison to the actual mandrel, that is to say the end-side mandrel section.
  • the supporting device can preferably be moved in the radial direction.
  • the radial movability also allows adaptation to different outer diameters of the workpiece section to be supported.
  • the axial movability allows reliable support of the mandrel bar and / or the workpiece during the forming process when the mandrel bar is moved axially to the machine bed and / or headstock during forming.
  • the support means preferably comprises a plurality of rotatably mounted support rollers to support a rotating workpiece or a rotating mandrel bar.
  • a guide device for axially guiding a region of the tubular workpiece.
  • the guide device is preferably arranged immediately in front of the forming roller, in particular in a still unshaped area of the workpiece.
  • the guide device is preferably configured to hold the workpiece centrally in the axis of rotation of the spinning mandrel.
  • the guide device supports the straightness of the finished part, in particular during a forming by means of only one forming roller.
  • a particularly reliable centering of the workpiece can be achieved in that the guide means the tubular workpiece ring or ringweegmentförmig at least partially encloses.
  • the particular sleeve or trough-shaped guide device supports the workpiece from the outside and performs this in the axial direction.
  • the guide device is preferably arranged non-rotating on the machine bed. The workpiece slides along the guide means.
  • the guide device is designed to guide a rotating workpiece.
  • the guide device can for this purpose have a sliding surface or a rotatably mounted guide sleeve.
  • the guide device has rotatable or non-rotatably mounted sliding and / or guide jaws. These support the workpiece from the outside and allow reliable centering and guiding a rotating workpiece.
  • the invention relates to a method and a device in which at least one tool mandrel axially as a function of the radial delivery of at least one retractable or pressure roller is moved so that between the pressure roller and mandrel different gap dimensions or wall thicknesses can be created depending on the diameter.
  • Lynetten and support units are used on the machine in front of and behind the forming rollers.
  • the Lynetten before the forming rollers are movable depending on the feed movement of the main spindle drive unit radially out of the center and in addition axially, axially displaceable in dependence on the mandrel.
  • flow measuring devices can be installed in the machine, which allow a simple flow rate control. This can preferably be done manually, but also automated.
  • the consistency of the cooling lubricant or coolant can also be measured. An impermissible deviation of the cooling lubricant in its consistency is displayed and / or automatically corrected. Due to the high forming capacity, emulsion systems with high filter performance are used by belt filters and / or magnetic separators. The emulsion is supplied via nozzles, which preferably ensure a particularly high and / or low heat dissipation.
  • the drive unit can still provide a significantly higher torque available.
  • the gear reduction is preferably carried out by a low-cost belt drive and / or gear set, such as low-backlash planetary gear.
  • the use of air-cooled or water-cooled engines is advantageous.
  • Fig. 1 shows an inventive device 80 for counter-rolling rollers.
  • the apparatus 80 includes a machine bed 82, a headstock 84, a support 86, and a tailstock 60.
  • the headstock 84 is mounted on the machine bed 82 axially movable. For axial movement of the headstock 84, a spindle drive 98 is provided.
  • a first chuck 94 is provided on the headstock 84.
  • the chuck 94 may be rotationally driven.
  • a spinning mandrel 18 in particular axially displaceable and / or rotatable, is also mounted.
  • an axial drive can be provided.
  • a rotary drive 92 may be provided.
  • the spinning mandrel 18 comprises a mandrel portion 20, which forms the actual forming mandrel, and a feed rod or mandrel 34 arranged in an axial extension of the mandrel portion 20.
  • the mandrel bar 34 is connected to the spinning mandrel 18 via a print head 90.
  • the printhead 90 disposed between the mandrel bar 34 and mandrel portion 20 causes a rotational decoupling between the mandrel bar 34 and mandrel portion 20.
  • an axial drive 88 is arranged with anti-rotation.
  • one or more forming rollers 40 or rollers about a rotational axis 42 are rotatably mounted on the support 86.
  • the axis of rotation 42 runs skewed to a longitudinal axis 32 of the spinning mandrel 18.
  • the support 86 may be fixedly connected to the machine bed 82.
  • Lynetten 96 may be arranged to support the workpiece 10.
  • the tailstock 60 is disposed to receive and support a second axial end 14 of the workpiece 10 behind the support 86.
  • the tailstock 60 is mounted axially movable on the machine bed 82.
  • On the tailstock 60 is a receptacle 61 for the workpiece 10, in particular the second axial end 14 of the workpiece 10, is provided.
  • the receptacle 61 comprises a second chuck 62, in which the second axial end 14 of the workpiece 10 is clamped.
  • a rotary drive 64 is provided for rotationally driving the second chuck 62.
  • an axial drive 66 is arranged for axial movement of the tailstock 60 along the machine bed 82.
  • the forming rollers 40 are delivered radially. As soon as the forming rollers 40 press the workpiece 10 onto the mandrel section 20, the mandrel section 20 is set in rotation by frictional engagement between the forming roller 40 and the workpiece 10. The printhead 90 prevents the mandrel bar 34 from rotating.
  • the workpiece 10 clamped to the headstock 84 can be moved axially. This is particularly advantageous in the processing of long workpieces 10, for example for the production of lampposts, and shortens the overall construction length of the device 10.
  • Fig. 2 shows a cross-sectional view through the in Fig. 1 illustrated device 80 along the section line AA.
  • On the support 86 four driven forming rollers 40 are arranged radially and axially movable on a holder 87.
  • FIG. 3 Another device 80 for counter-rolling is shown.
  • the support 86 is arranged axially movable on the machine bed 82 and the headstock 84 fixed to the machine bed 82.
  • the forming rollers 40 are mounted radially movable.
  • tubular workpieces can be transformed particularly economically and precisely overall.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Shaping Metal By Deep-Drawing, Or The Like (AREA)

Claims (12)

  1. Dispositif de formage d'une pièce tubulaire (10) avec
    - un banc de machine (82),
    - une poupée (84) logée au niveau du banc de machine (82),
    - un mandrin de pression (18) logé au niveau de la poupée (84) pour la réception de la pièce tubulaire (10),
    - un mandrin de serrage (94) logé au niveau de la poupée (84) pour le serrage d'une première extrémité axiale (12) de la pièce tubulaire (10) et
    - au moins un rouleau de formage (40) pour le formage de la pièce tubulaire (10) agencée autour du mandrin de pression (18),
    - une contre-poupée (60), au niveau de laquelle un logement (61) est prévu pour la réception et le support de la deuxième extrémité axiale (14) de la pièce tubulaire (10),
    caractérisé en ce
    que la contre-poupée (60) est logée axialement coulissante au niveau du banc de machine (82).
  2. Dispositif selon la revendication 1,
    caractérisé en ce
    que le logement (61) présente un deuxième mandrin de serrage (62) pour le serrage de la deuxième extrémité axiale (14) de la pièce tubulaire (10).
  3. Dispositif selon la revendication 2,
    caractérisé en ce
    que le deuxième mandrin de serrage (62) est logé en rotation au niveau de la contre-poupée (60) et peut être mis en rotation par la pièce (10).
  4. Dispositif selon la revendication 2 ou 3,
    caractérisé en ce
    qu'un entraînement rotatif (64) est prévu pour l'entraînement rotatif du deuxième mandrin de serrage (62).
  5. Dispositif selon l'une quelconque des revendications 1 à 4,
    caractérisé en ce
    que la contre-poupée (60) est logée librement coulissante au niveau du banc de machine (82).
  6. Dispositif selon l'une quelconque des revendications 2 à 5,
    caractérisé en ce
    qu'un entraînement axial (66) est prévu pour le déplacement axial de la contre-poupée (60) conjointement avec le deuxième mandrin de serrage (62), en particulier pour la traction de la pièce (10).
  7. Dispositif selon l'une quelconque des revendications 1 à 6,
    caractérisé en ce
    qu'un mandrin est prévu au niveau de la contre-poupée (60) pour la réception de matériau non formé de la pièce tubulaire (10).
  8. Dispositif selon l'une quelconque des revendications 1 à 7,
    caractérisé en ce
    que le mandrin de pression (18) présente une section de mandrin côté extrémité (20), laquelle est logée en rotation au niveau d'une tige de mandrin (34), et
    qu'un dispositif d'appui déplaçable axialement et/ou radialement (96) est prévu pour l'appui de la tige de mandrin (34) et/ou de la pièce (10).
  9. Dispositif selon l'une quelconque des revendications 1 à 8,
    caractérisé en ce
    qu'un dispositif de guidage est prévu pour le guidage axial d'une zone de la pièce tubulaire (10).
  10. Dispositif selon la revendication 9,
    caractérisé en ce
    que le dispositif de guidage entoure la pièce tubulaire (10) de manière annulaire.
  11. Dispositif selon la revendication 9 ou 10,
    caractérisé en ce
    que le dispositif de guidage présente des mâchoires de glissement et/ou de guidage logées en rotation.
  12. Procédé de formage d'une pièce tubulaire (10), avec un dispositif selon l'une quelconque des revendications 1 à 11, avec
    - un banc de machine (82),
    - une poupée (84) logée au niveau du banc de machine (82),
    - un mandrin de pression (18) logé au niveau de la poupée (84), au niveau duquel la pièce tubulaire (10) est reçue,
    - un mandrin de serrage (94) logé au niveau de la poupée (84), avec lequel une première extrémité axiale (12) de la pièce tubulaire (10) est serrée,
    - au moins un rouleau de formage (40), avec lequel la pièce tubulaire (10) agencée autour du mandrin de pression (18) est formée, et
    - la deuxième extrémité axiale (14) de la pièce tubulaire (10) est reçue et retenue au niveau d'une contre-poupée (60) au moyen d'un logement (61),
    caractérisé en ce
    que la contre-poupée (60) avec le logement (61) est déplacée axialement au niveau du banc de machine (82) lors du formage.
EP16822385.7A 2016-03-04 2016-12-05 Dispositif et procédé de formage d'une pièce tubulaire Active EP3423205B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE202016101179.5U DE202016101179U1 (de) 2016-03-04 2016-03-04 Vorrichtung zum Umformen eines rohrförmigen Werkstücks
PCT/EP2016/079741 WO2017148552A1 (fr) 2016-03-04 2016-12-05 Dispositif et procédé de formage d'une pièce tubulaire

Publications (2)

Publication Number Publication Date
EP3423205A1 EP3423205A1 (fr) 2019-01-09
EP3423205B1 true EP3423205B1 (fr) 2019-06-26

Family

ID=55638441

Family Applications (1)

Application Number Title Priority Date Filing Date
EP16822385.7A Active EP3423205B1 (fr) 2016-03-04 2016-12-05 Dispositif et procédé de formage d'une pièce tubulaire

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EP (1) EP3423205B1 (fr)
DE (1) DE202016101179U1 (fr)
WO (1) WO2017148552A1 (fr)

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CN110978861B (zh) * 2019-12-24 2021-01-15 温州大学新材料与产业技术研究院 一种大管径针管笔头的缩颈方法
CN114011941A (zh) * 2021-12-02 2022-02-08 西安航天动力机械有限公司 一种新型旋压机结构及旋压方法

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
SU644565A1 (ru) * 1974-12-23 1979-01-30 Государственный Научно-Исследовательский И Проектный Институт Сплавов И Обработки Цветных Металлов Способ периодической бухтовой прокатки труб
JPS6384704A (ja) * 1986-09-29 1988-04-15 Manabu Kiuchi コ−ルドピルガ−圧延方法及び装置
DE3826120A1 (de) * 1988-08-01 1990-02-08 Kabelmetal Ag Vorrichtung zum pilgerwalzen von rohren
EP2210682B1 (fr) 2009-07-09 2012-03-14 Leifeld Metal Spinning AG Méthode et appareil de fluotournage

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Also Published As

Publication number Publication date
DE202016101179U1 (de) 2016-03-16
EP3423205A1 (fr) 2019-01-09
WO2017148552A1 (fr) 2017-09-08

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