EP4112200A1 - Dispositif et procédé de réduction de la section d'un corps creux tubulaire par formage du corps creux - Google Patents

Dispositif et procédé de réduction de la section d'un corps creux tubulaire par formage du corps creux Download PDF

Info

Publication number
EP4112200A1
EP4112200A1 EP21183206.8A EP21183206A EP4112200A1 EP 4112200 A1 EP4112200 A1 EP 4112200A1 EP 21183206 A EP21183206 A EP 21183206A EP 4112200 A1 EP4112200 A1 EP 4112200A1
Authority
EP
European Patent Office
Prior art keywords
hollow body
die
mandrel
axial
movement
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.)
Pending
Application number
EP21183206.8A
Other languages
German (de)
English (en)
Inventor
Nadezda Missal
Serjosha Heinrichs
Max Olaf JANDT
Sascha VÖGELE
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.)
Felss Systems GmbH
Original Assignee
Felss Systems GmbH
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 Felss Systems GmbH filed Critical Felss Systems GmbH
Priority to EP21183206.8A priority Critical patent/EP4112200A1/fr
Priority to CN202280053720.7A priority patent/CN117794657A/zh
Priority to PCT/EP2022/065524 priority patent/WO2023274671A1/fr
Priority to KR1020247003403A priority patent/KR20240027781A/ko
Publication of EP4112200A1 publication Critical patent/EP4112200A1/fr
Pending legal-status Critical Current

Links

Images

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
    • 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
    • B21C1/18—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 from stock of limited length
    • 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
    • B21C1/26—Push-bench drawing
    • 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
    • B21C3/00—Profiling tools for metal drawing; Combinations of dies and mandrels
    • B21C3/02—Dies; Selection of material therefor; Cleaning thereof
    • B21C3/04—Dies; Selection of material therefor; Cleaning thereof with non-adjustable section
    • 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
    • B21C3/00—Profiling tools for metal drawing; Combinations of dies and mandrels
    • B21C3/16—Mandrels; Mounting or adjusting same

Definitions

  • steering shafts designed as hollow shafts for motor vehicles are manufactured using the device mentioned at the outset and using the method mentioned at the outset while tapering a shaft blank.
  • the object of the present invention is to provide a device and a method that enable functionally reliable and high-quality machining results to reduce the cross section of tubular hollow bodies with the least possible design effort, in particular without additional reinforcement of the hollow bodies to be machined.
  • the forming drive has a mandrel drive in addition to the die drive.
  • the die drive By means of the die drive, the forming die arranged on the outside of the hollow body is actively moved along the axis of the hollow body with an axial movement of the die.
  • the undeformed hollow body in its initial state is oversized compared to the opening cross section of the die opening, ie that opening of the forming die that is designed to produce the reduced hollow body cross section ("calibration section"). Due to the active movement of the forming die relative to the hollow body, the wall of the hollow body acted upon by the forming die is actively subjected to pressure by the forming die in the direction of the axial movement of the die.
  • the wall of the hollow body is subjected to tensile stress in the direction of the axial mandrel movement on the side of the action by the forming die in the direction of the axial mandrel movement due to the axial mandrel movement in the opposite direction to the axial movement of the mandrel.
  • the mutual superimposition of the active axial mandrel movement and the active axial die movement of the forming die arranged on the outside of the hollow body by means of the drive control of the forming drive according to the invention is of essential importance to the invention. Due to the superimposition of the two movements mentioned, the compressive stresses that build up in the wall of the hollow body due to the action of the forming die across the wall cross-section are at least partially compensated by the tensile stresses in the wall of the hollow body as a result of the active axial movement of the mandrel.
  • both the axial mandrel movement and the axial die movement can be both position and force controlled.
  • the forming speed of the device according to the invention and the method according to the invention is largely independent of the material strength of the hollow body to be formed.
  • high-strength materials With high-strength materials, relatively high forming forces are required, but at the same time the tendency of hollow bodies made of high-strength materials to buckle is relatively low.
  • tube-like hollow bodies made of low-strength materials tend to compress relatively strongly, but a reduction in the cross section of such hollow bodies is possible with relatively low forming forces.
  • a stationary axial abutment is provided for the hollow body in a preferred embodiment of the invention, on which the hollow body is supported when acted upon by the forming die in the direction of the axial die movement.
  • the ratio of the speeds of the axial mandrel movement and the axial die movement of the forming die arranged on the outside of the hollow body is adjusted by means of the drive control of the forming drive, depending on the ratio of the cross section of the hollow body in the initial state and the reduced cross section of the hollow body .
  • the speed of the axial die movement of the forming die arranged on the outside of the hollow body can be greater or less than the speed of the axial movement of the mandrel.
  • high-quality machining results could be achieved at a die speed of 30 mm/s to 60 mm/s and a mandrel speed of 21 mm/s to 43 mm/s.
  • a further embodiment of the invention provides that the ratio of the amounts of the axial mandrel movement and the axial die movement during the forming process is reciprocal to the ratio of the speeds of the axial mandrel movement and the axial die movement during the forming process. This ensures that the active mandrel and forming die movements carried out to form a hollow body over a forming length end simultaneously, despite different speeds of the mandrel and the forming die, when the forming length is reached.
  • Patent claim 5 provides in a further advantageous embodiment of the invention that the forming die can be moved by means of the die drive with a positioning movement from a position away from the hollow body to be formed into a position in which the forming die is arranged on the outside of the hollow body and that by means of the drive control of the Device drive the die drive and the mandrel drive are controlled in such a way that the mandrel drive initiates the axial mandrel movement before the forming die acts on the hollow body wall due to the positioning movement.
  • the mandrel and the hollow body which is driven by it along the axis of the hollow body and subjected to tensile stress during the forming process, are therefore already in Movement.
  • the positioning movement of the forming die is preferably carried out in the direction of the axial movement of the die.
  • the speeds of the axial mandrel movement and the positioning movement of the forming die before the hollow body wall is acted upon by the forming die can be significantly higher than the speeds during the forming process. Accordingly, there is the possibility of moving the mandrel with the hollow body and/or the forming die in rapid traverse into that position in which the forming die comes into contact with the wall of the hollow body for the subsequent processing of the hollow body.
  • inventive design according to patent claim 6 is designed due to the cross-sectional ratios according to the claims for a cross-sectional reduction of the hollow body by reducing the thickness of the hollow body wall.
  • the reduction in cross section of the hollow body is accompanied by an additional reshaping of the hollow body wall on its outside and/or on its inside.
  • an external toothing and/or an internal toothing of the hollow body with reduced cross-section are preferably produced.
  • the reduction in cross section of the hollow body can be combined with the creation of a desired outer profile of the hollow body and/or with the creation of a desired inner profile of the hollow body.
  • the movement-related coupling of the mandrel and the hollow body for tensile stressing of the hollow body in the direction of the axial movement of the mandrel can take place according to the invention in different ways.
  • the mandrel loads the wall of the hollow body due to a form fit existing between the mandrel and the wall of the hollow body.
  • the wall of the hollow body can, for example, have a projection that protrudes into the interior of the hollow body and on which the mandrel is supported with its end that is leading in the direction of the axial mandrel movement.
  • patent claim 9 in a development of the invention, a frictional connection is generated between the mandrel and the hollow body wall of the hollow body to be formed.
  • patent claim 10 expediently provides that the forming die arranged on the outside of the hollow body acts on the wall of the hollow body in the radial direction of the axis of the hollow body against the mandrel. The creation of the frictional connection between the hollow body wall and the mandrel therefore takes place at the beginning of the forming process.
  • both a form-fitting and a force-fitting connection of the hollow body wall to the mandrel executing the axial mandrel movement is also conceivable.
  • a device 1 is used to reduce the cross section of a tubular hollow body in the form of a cylindrical tube 2.
  • the tube 2 has a tube wall 3 made of a plastically deformable material as the hollow body wall and a tube axis 4 running in the longitudinal direction of the tube 2 as the hollow body axis.
  • a steering shaft for a motor vehicle is produced from the pipe 2 in several production steps.
  • the cross section of the tube 2 is reduced by means of the device 1.
  • the device 1 is installed on an axial forming machine of conventional design, for example on an axial forming machine such as that shown in FIG of the company FELSS Systems GmbH, 75203 Königsbach-Stein, Germany, under the product name "Aximus”.
  • the axial forming machine has a tool holder for a forming die 5 that is movable along the tube axis 4 and a mandrel holder that is also movable along the tube axis 4 for fixing the end of a mandrel 6 remote from the forming die 5 .
  • the tool holder for the forming die 5 and the mandrel holder are not shown in the figures for the sake of simplicity.
  • the forming die 5 is provided with a die opening 7 ("calibration section") designed to reduce the cross section of the pipe 2, the opening cross section of which is smaller than the cross section of the pipe 2 in the initial state according to FIG.
  • the die opening 7 has smooth walls.
  • the die opening 7 can be provided on its periphery with shaping elements, for example with shaping teeth or with profile-generating elements.
  • Forming drive 8 shown very schematically, comprises a mandrel drive 9 and a die drive 10.
  • a numerical drive controller 11 controls both the mandrel drive 9 and the die drive 10.
  • the tube 2 to be formed is mounted on the axial forming machine with one end on an axial abutment 12 that is stationary along the tube axis 4 .
  • the mandrel 6 is moved by means of the mandrel drive 9 with an axial mandrel movement along the tube axis 4 in the direction of an arrow 13 and the forming die 5 by means of the die drive 10 with an axial die movement along the tube axis 4 in the direction of an arrow 14.
  • figure 1 shows the conditions on the device 1 immediately before the start of the cross-section-reducing forming of the tube 2.
  • the mandrel 6 was moved to its position along the tube axis 4 by means of the mandrel drive 9 and the forming die 5 by means of the die drive 10 in rapid traverse.
  • the feed speeds of the forming die 5 and the mandrel 6, which are relatively high at this point in time, are significantly reduced due to a corresponding activation of the mandrel drive 9 and the die drive 10 by the drive controller 11 as soon as the die opening 7 of the forming die 5 reaches the end of the tube facing the forming die 5 2 reached.
  • the reduction in speed of the forming die 5 and the mandrel 6 can take place both in a position- and force-controlled manner.
  • the speed of the axial mandrel movement in the direction of arrow 13 is set to 15 mm/s and the speed of the axial die movement of the forming die 5 in the direction of arrow 14 to 60 mm/s for the forming of the tube 2 by means of the drive control 11 .
  • the axial movement of the mandrel and the axial movement of the die are superimposed on one another by means of the drive control 11 .
  • the tube wall 3 is subjected to pressure in the direction of arrow 14 by the forming die 5 on its side in the direction of arrow 14 and the yield point of the material of the tube wall 3 is thereby exceeded.
  • the axial abutment 12, which supports the tube 2 acted upon by the forming die 5, is stationary along the tube axis 4 during the actuation of the tube 2 by the forming die 5.
  • the tube wall 3 which is acted upon on the outside by the forming die 5, is subjected to tensile stress on the side of the forming die 5 in the direction 13 of the axial movement of the mandrel by means of the mandrel 6 in the direction of arrow 13.
  • the mandrel 6 driven by the mandrel drive 9 consequently actively pulls the tube wall 3 in the direction of the arrow 13 through the die opening 7 and the thickness of the tube wall 3 is reduced while the tube 2 is lengthened at the same time.
  • figure 2 shows the conditions on the device 1 during the ongoing forming process.
  • the mandrel 6 stresses the tube wall 3 on the side remote from the forming die 5 in the direction 13 of the axial movement of the mandrel.
  • the pipe wall 3 is subjected to pressure by the forming die 5 .
  • the forces exerted by the forming die 5 and the mandrel 6 on the pipe wall 3 are illustrated in FIG. 2 by arrows 15, 16.
  • X D is in figure 2 denotes the path length over which the mandrel 6 relative to its position in figure 1 has been advanced in the direction 13 of axial mandrel movement.
  • X denotes M in figure 2 the length of the traversing path of the forming die 5 based on the conditions according to FIG figure 1 .

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Forging (AREA)
  • Extrusion Of Metal (AREA)
  • Metal Extraction Processes (AREA)
EP21183206.8A 2021-07-01 2021-07-01 Dispositif et procédé de réduction de la section d'un corps creux tubulaire par formage du corps creux Pending EP4112200A1 (fr)

Priority Applications (4)

Application Number Priority Date Filing Date Title
EP21183206.8A EP4112200A1 (fr) 2021-07-01 2021-07-01 Dispositif et procédé de réduction de la section d'un corps creux tubulaire par formage du corps creux
CN202280053720.7A CN117794657A (zh) 2021-07-01 2022-06-08 通过改形空心体来减小管状的空心体的横截面的设备和方法
PCT/EP2022/065524 WO2023274671A1 (fr) 2021-07-01 2022-06-08 Appareil et procédé permettant de réduire la section transversale d'un corps creux tubulaire par mise en forme du corps creux
KR1020247003403A KR20240027781A (ko) 2021-07-01 2022-06-08 관형 중공 바디의 단면을 중공 바디의 성형에 의해 감소시키는 장치 및 방법

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
EP21183206.8A EP4112200A1 (fr) 2021-07-01 2021-07-01 Dispositif et procédé de réduction de la section d'un corps creux tubulaire par formage du corps creux

Publications (1)

Publication Number Publication Date
EP4112200A1 true EP4112200A1 (fr) 2023-01-04

Family

ID=76744736

Family Applications (1)

Application Number Title Priority Date Filing Date
EP21183206.8A Pending EP4112200A1 (fr) 2021-07-01 2021-07-01 Dispositif et procédé de réduction de la section d'un corps creux tubulaire par formage du corps creux

Country Status (4)

Country Link
EP (1) EP4112200A1 (fr)
KR (1) KR20240027781A (fr)
CN (1) CN117794657A (fr)
WO (1) WO2023274671A1 (fr)

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2006053590A1 (fr) * 2004-11-20 2006-05-26 Gkn Driveline International Gmbh Reduction de tubes au moyen d'un mandrin a niveaux pour realiser des arbres creux a contre-depouille en une operation

Family Cites Families (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
BE380771A (fr) * 1931-06-22 1931-07-31
GB1104630A (en) * 1965-10-21 1968-02-28 Polaroid Corp Improvements relating to photographic apparatus

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2006053590A1 (fr) * 2004-11-20 2006-05-26 Gkn Driveline International Gmbh Reduction de tubes au moyen d'un mandrin a niveaux pour realiser des arbres creux a contre-depouille en une operation

Also Published As

Publication number Publication date
WO2023274671A1 (fr) 2023-01-05
KR20240027781A (ko) 2024-03-04
WO2023274671A9 (fr) 2024-01-04
CN117794657A (zh) 2024-03-29

Similar Documents

Publication Publication Date Title
EP2210682B1 (fr) Méthode et appareil de fluotournage
EP2467231B1 (fr) Procédé de fabrication d'un élément de colonne de direction formant une section d'une colonne de direction
DE19861391B4 (de) Verfahren zum Formen einer Nabenscheibe und Drückrolle zur Verwendung beim Formen einer Nabenscheibe
DE69816145T2 (de) Verfahren und Vorrichtung zur Herstellung einer Zahnstange
DE102013226929A1 (de) Verfahren und Vorrichtung zur Herstellung einer Hohlwelle durch Radialumformen sowie hiermit hergestellte Hohlwelle
EP2591866A1 (fr) Procédé de fabrication d'une pièce creuse à rotation symétrique et pièce creuse fabriquée ensuite
DE102007041149B3 (de) Verfahren und Vorrichtung zum Querwalzen abgestufter Hohlwellen oder zylindrischer Hohlteile aus einem Rohr
DE102005028828B3 (de) Verfahren und Vorrichtung zum Herstellen von Metallringen
EP3924114B1 (fr) Procédé et dispositif de déformation axiale d'un tube
DE102007002228A1 (de) Verfahren und Vorrichtung zur Herstellung von innenprofilierten Rohren
EP2205371B1 (fr) Procédé pour fabriquer des systèmes à double tube
EP3807023B1 (fr) Machine de laminage à froid et procédé de génération d'un profil au niveau d'une pièce
EP4112200A1 (fr) Dispositif et procédé de réduction de la section d'un corps creux tubulaire par formage du corps creux
EP1660257B1 (fr) Procede et dispositif pour realiser des tubes au moins partiellement profiles
DE3019592C2 (de) Vorrichtung zum Bearbeiten von Stahlrohren
DE19849981C5 (de) Verfahren zum Formen eines scheibenförmigen Teiles mit Nabe und Drückrolle für das Verfahren
WO2008003305A1 (fr) Procédé de production d'une pièce à symétrie de rotation et pièce ainsi obtenue
EP0997210B1 (fr) Procédé de fabrication d'objets en forme de disque avec moyeu et rouleau de pression pour exécuter ledit procédé
EP3737514B1 (fr) Procédé et dispositif servant à fabriquer des soupapes creuses refroidies à l'intérieur
DE102012112029A1 (de) Verfahren zur Herstellung ringförmiger Funktionskörper eines Türbetätigers zur Betätigung einer Tür
DE102018110119B3 (de) Verfahren und Vorrichtung zur Herstellung eines Endprodukts aus einem Zwischenprodukt mittels Umformung
EP4155001B1 (fr) Dispositifs et procédé de formage d'une pièce creuse tubulaire
DE102007046870A1 (de) Verfahren und Vorrichtung zur Umformung eines Stangenmaterials
EP2205370B1 (fr) Procede et dispositif de fabrication d'un corps creux et corps creux
EP3345694A1 (fr) Procédé et dispositif pour épaissir localement et ainsi fabriquer un corps creux

Legal Events

Date Code Title Description
STAA Information on the status of an ep patent application or granted ep patent

Free format text: STATUS: EXAMINATION IS IN PROGRESS

PUAI Public reference made under article 153(3) epc to a published international application that has entered the european phase

Free format text: ORIGINAL CODE: 0009012

17P Request for examination filed

Effective date: 20220429

AK Designated contracting states

Kind code of ref document: A1

Designated state(s): AL AT BE BG CH CY CZ DE DK EE ES FI FR GB GR HR HU IE IS IT LI LT LU LV MC MK MT NL NO PL PT RO RS SE SI SK SM TR

GRAP Despatch of communication of intention to grant a patent

Free format text: ORIGINAL CODE: EPIDOSNIGR1

STAA Information on the status of an ep patent application or granted ep patent

Free format text: STATUS: GRANT OF PATENT IS INTENDED

INTG Intention to grant announced

Effective date: 20240325