EP1660257B1 - Procede et dispositif pour realiser des tubes au moins partiellement profiles - Google Patents

Procede et dispositif pour realiser des tubes au moins partiellement profiles Download PDF

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Publication number
EP1660257B1
EP1660257B1 EP03818481A EP03818481A EP1660257B1 EP 1660257 B1 EP1660257 B1 EP 1660257B1 EP 03818481 A EP03818481 A EP 03818481A EP 03818481 A EP03818481 A EP 03818481A EP 1660257 B1 EP1660257 B1 EP 1660257B1
Authority
EP
European Patent Office
Prior art keywords
blank
mandrel
clamping mechanism
headstock
lance
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
EP03818481A
Other languages
German (de)
English (en)
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EP1660257A1 (fr
Inventor
Peter Geser
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.)
Ernst Grob AG
Original Assignee
Ernst Grob AG
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 Ernst Grob AG filed Critical Ernst Grob AG
Publication of EP1660257A1 publication Critical patent/EP1660257A1/fr
Application granted granted Critical
Publication of EP1660257B1 publication Critical patent/EP1660257B1/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
    • B21H—MAKING PARTICULAR METAL OBJECTS BY ROLLING, e.g. SCREWS, WHEELS, RINGS, BARRELS, BALLS
    • B21H7/00—Making articles not provided for in the preceding groups, e.g. agricultural tools, dinner forks, knives, spoons
    • B21H7/18—Making articles not provided for in the preceding groups, e.g. agricultural tools, dinner forks, knives, spoons grooved pins; Rolling grooves, e.g. oil grooves, in articles
    • B21H7/187—Rolling helical or rectilinear grooves
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21J—FORGING; HAMMERING; PRESSING METAL; RIVETING; FORGE FURNACES
    • B21J5/00—Methods for forging, hammering, or pressing; Special equipment or accessories therefor
    • B21J5/06—Methods for forging, hammering, or pressing; Special equipment or accessories therefor for performing particular operations
    • B21J5/12—Forming profiles on internal or external surfaces
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21K—MAKING FORGED OR PRESSED METAL PRODUCTS, e.g. HORSE-SHOES, RIVETS, BOLTS OR WHEELS
    • B21K21/00—Making hollow articles not covered by a single preceding sub-group
    • B21K21/16—Remodelling hollow bodies with respect to the shape of the cross-section

Definitions

  • the present invention relates to a method according to the preamble of claim 1 and a device according to the preamble of claim 9.
  • Pipe sections are made, for example, in the automotive industry for use as sliding pieces for propshafts or sliding steering columns.
  • two mutually longitudinally displaceable tubes are generally used, which are positively connected with respect to rotation about their longitudinal axes.
  • changes in the distance between the end points of these tubes can be compensated and still be transmitted an exact rotation.
  • These requirements are, as already mentioned, required both in the powertrain or the steering in motor vehicles.
  • These tubes should on the one hand be built as light as possible, have an exact profiling with the least possible play and high strength.
  • a likewise profiled mandrel is conventionally used, such as in the US 5,001,916 shown.
  • This mandrel is introduced into a tube blank and acted from the outside mechanically on the surface of the blank, for example in the form of impact rollers. This is usually done automatically in a suitably designed production machine.
  • the mandrel must have a greater length than the area to be machined of the blank, since the mandrel must remain used for the profiling within the entire length of the blank and then must be withdrawn into the production machine to remove the finished workpiece and the production machine with to feed a new blank.
  • the object of the present invention was to find a method and a device which is also suitable for the production of relatively long, at least partially profiled pipe sections by means of mechanical forming machines.
  • the length of the mandrel can be selected according to the length of the region to be machined of the blank.
  • the range of motion of the mandrel can be practically limited to the length of the area to be machined. This leads advantageously to smaller machine dimensions, especially in the field of drives and guides.
  • the drive of the processing station and the rotary drive of the mandrel can thus be arranged very compact on the same machine frame.
  • both the charging and the discharging process can advantageously be carried out by means of a single device.
  • the method is particularly suitable for the application of the impact rolling process as a mechanical forming process, i. the successive hammering resp. beating blanks radially from the outside by means of profiled or flat rolling rolls. This allows both internal gears as well as simultaneously produce internal and external gears in a known manner.
  • the first clamping of the blank preferably takes place via a spring-loaded pretensioning device, which is realized in the clamping device. That that the blank is introduced from the loading device in the biasing means and is held there for delivery via the mandrel.
  • the blank is pushed by an axial movement of the clamping device over the mandrel and then together through the processing station.
  • the drives are both the longitudinal movement through the processing station as well as the possible intermittent rotational movement for the generation of a Accurate gearing advantageously implemented in the primary headstock.
  • the inventive arrangement of primary headstock, processing station and secondary headstock a space-saving and compact design of the device is achieved.
  • the machine frame with the integrated thereon primary headstock and the processing station thus has in comparison to conventional devices no larger or even smaller dimensions, although so longer to be machined areas of the blanks resp. longer blanks can be processed.
  • the protruding from this machine frame areas for holding and guiding the secondary headstock are also very compact and compact and can also load the resp. Have unloading the blanks, resp. keep enough space for the access of such devices.
  • Figure 1 is a schematic view of the structure of a conventional device for the production of inside and outside profiled tubes shown.
  • the device has on the right side a headstock 1 with intermittent rotation drive.
  • a mandrel 2 is arranged, which has a corresponding to the applied to the blank 3 profiling surface.
  • the blank 3 has two diameter regions, a first region 3 'with a smaller diameter and a second region 3 "with a larger diameter
  • the profiling should be formed on the region 3" of the blank 3 in the illustrated example. Typically, this is a tooth profile running parallel to the blank axis a.
  • Such internally profiled workpieces are used, for example, for two-part telescopic tubes for forming telescopic connections in vehicle construction.
  • a counter-holder 4 On the left side, a counter-holder 4 is formed, which has a longitudinally displaceable quill 5.
  • the mechanical machining means 6 acting radially from the outside onto the blank 3 are shown schematically in the form of two circles.
  • the machining means are known rotating impact rollers which are brought into engagement with the surface of the blank 3 in a circular movement path and thereby form the profiling in accordance with the shape of the mandrel 2 on the blank 3.
  • the front of the mandrel 2 is known to be inserted into the opening of the blank 3 from right to left and the mandrel 2 further brought together with the blank 3 against the quill 5 into abutment. Thereafter, the formation of the profiling under intermittent rotational movement and longitudinal displacement of the mandrel 2 relative to the processing means. 6
  • the mandrel 2 must be designed to be correspondingly long and thus also the distance between the headstock 1 and the anvil 4. Furthermore, the mandrel 2 has to be fully retracted into the blank 3 But also completely out of the blank 3 can be extended so that it can be supplied at all and then led away again.
  • a primary headstock 1 is also arranged here longitudinally displaceable in the machine frame 7 of the processing device. From the primary headstock 1, the mandrel 2 is further driven to rotate intermittently about its longitudinal axis. Further, on the machine frame 7, the processing means 6 are arranged to act radially with respect to the primary headstock axis. For example, here too, the processing means 6 are designed in the form of impact rollers. So that all drive means resp.
  • a lance 8 is now coaxial with the mandrel 2, which is guided axially displaceably through the mandrel 2.
  • the left end of the lance 8 is held in a drive, which allows an axial movement of the lance 8 relative to the primary headstock 1.
  • this drive is not shown in FIG.
  • the drive may be, for example, a hydraulic cylinder, which allows the lance 8 to be acted upon by a high static tensile force in the direction of the primary headstock 1.
  • the free end of the lance 8 is in the region of the tip 8 'with a toothing resp. Grooved, as will be described in more detail below.
  • a secondary headstock 4 is arranged to be longitudinally displaceable on a support 9 of the machine frame 7, as can be seen in FIG.
  • This secondary headstock 4 has a clamping device 10 in the form of a collet for holding the blank 3.
  • the front of the area 3 "of the blank 3 to be machined is directed towards the primary headstock 1, while the end of the area 3 'which is not to be processed is held in the clamping device 10.
  • the secondary headstock 4 In this rest or feed position, the secondary headstock 4 is so far to the left of the area of the processing means 6, that the entire length of the Blank 3 is left outside the range of the processing means 6.
  • the blank 3 before processing by means of suitable supply means easily and automatically perform the clamping device 10 and after processing of the blank 3, if necessary, remove again without interfering with the machining means 6 in the area of the machine frame 7.
  • the mandrel 2 can be formed only in the length of the area to be machined 3 '' of the blank 3 and thus also short the length of the guides of the primary spindle 4 for the longitudinal movement thereof. Furthermore, the length of the machine frame in the area of the primary headstock 1 and the machining means 6 can therefore be relatively short even for relatively long blanks 3 corresponding to the length of the area 3 "to be machined and need not be, as in conventional arrangements, at least over the full length respectively. extend to twice the length of the blank 3.
  • the clamping device 10 is freely rotatably arranged in the longitudinally displaceable headstock 4, as can be seen from the figure 3 in longitudinal section.
  • the clamping device 10 advantageously has a cylindrical shell 11, within the right end of a collet 12 is arranged. In the cylindrical gap formed between the collet 12 and the clamping ring 13 arranged around it, the end of the blank 3 can be inserted, as shown in Figure 4.
  • the collet 12 is actuated by means of a sleeve 11 in the longitudinally displaceable cone 14.
  • the cone 14 is resiliently supported against a likewise slidably disposed in the jacket 11 clamping piston 15 which is rotatably mounted and held on the actuating rod 16.
  • Figure 5 shows the inserted and held between the collet 12 and the clamping ring 13 blank 3.
  • the clamping piston 15 has been moved against the collet 12 out in the shell 11 and thus pushes the cone 14 via the spring 17 to the inside of the collet 12 and thus fixes the blank 3 in the corresponding position.
  • the lance 8 in the region of its tip 8 'has a longitudinal toothing 19, which engage in corresponding slots of the rotary driver 18.
  • the Rotationsmit withdrawing 18 is positioned respectively. the clamping device 10 automatically in the correct Vercardlage.
  • FIG. 7 shows the clamping device 10 and the lance 8, which are completely connected with each other shown.
  • the rear portion 20 of the Drehmit ceremonies 18 is conically shaped as a collet and its inner side has radial circumferential grooves, in which the radially encircling ribs of the tip of the lance 8 can engage positively.
  • the lance 8 can now be pulled by its drive to the right to the primary headstock 1 and put under tension, which is now firmly clamped on the Rotationsmit legislative 18 and the collet 12 of the blank 3 for machining and rotationally pressed against the stop on the mandrel 2.
  • This embodiment of the clamping device 10 thus allows, according to the invention, the blank 3 to grip and fix it on its area 3 'which is not to be machined.
  • the movement for fixing is effected by a longitudinal drive arranged on the secondary headstock 4, for example an electric or hydraulic drive, which moves the tensioning piston 15 in the casing 11 of the clamping device 10 in the direction of the blank 3.
  • the clamping device 10 connected to the primary headstock 1 by the lance 8 is now moved axially together with the blank 8 through the processing area of the processing means 6, whereby an intermittent rotation of the blank 3 is effected due to the drive of the mandrel 2.
  • the profiling of the blank 3 is now carried out preferably by means of the impact rollers of the processing means 6 in a known manner.
  • the impact rollers either profiled or flat rollers, inside and outside or possibly only inside a profiling of the blank 3 done.
  • the finished blank 3 can be fixed after radial advancement of the processing means 6 in this position and held by the feed device.
  • the mandrel 2 with the primary headstock 1 can now be removed from the blank 3 to the right.
  • the processing means 6 can be moved back into its rest position and then the blank 3, by retracting the clamping device 10 with the secondary headstock 4 in the starting position, are retracted in the region of the feeder.
  • the blank 3 can now be unloaded from the loading area and a new blank 3, as described above, the clamping device 4 are supplied.
  • blanks having an outer diameter of between 20 mm and 200 mm and a length of up to 6,000 mm can be machined with the method and apparatus according to the invention, whose area to be machined has a length of up to 1,000 mm.
  • Such thin-walled tubes can have a wall thickness between 1.0 mm and 8.0 mm and are then joined together to form a high-precision telescopic tube.
  • the blanks consist of steel or other metals.
  • shorter tubes can be processed with shorter areas to be machined.

Claims (13)

  1. Procédé de fabrication de tubes au moins partiellement profilés au moins à l'intérieur à partir d'une ébauche (3) cylindrique creuse,
    caractérisé en ce que
    - l'ébauche (3) est amenée, par l'extrémité (3') non à usiner, dans un dispositif de serrage (10),
    - l'ébauche (3) est maintenue serrée dans le dispositif de serrage (10),
    - un mandrin (2) disposé sur une poupée primaire (1) est ensuite introduit dans l'extrémité de la zone (3") à usiner de l'ébauche (3),
    - et l'extrémité libre d'une lance (8) est guidée coaxialement à travers le mandrin (2) et l'ébauche (3) jusqu'au dispositif de serrage (10),
    - la lance (8) est ensuite reliée au dispositif de serrage (10) par complémentarité de formes, au moins concernant la traction et la rotation,
    - le mandrin (2) est ensuite guidé axialement conjointement avec le dispositif de serrage (10) et l'ébauche (3) à travers une station d'usinage fixe (6), de sorte que la station d'usinage (6) agisse radialement de l'extérieur sur la surface de l'ébauche (3) le long de la zone (3") à usiner pour produire au moins le profilage intérieur dans l'ébauche (3).
  2. Procédé selon la revendication 1,
    caractérisé en ce que
    la mandrin (2) est entraîné axialement et en rotation intermittente, de préférence par un entraînement disposé sur la poupée primaire (1).
  3. Procédé selon l'une quelconque des revendications 1 à 2,
    caractérisé en ce que
    comme procédé de transformation à froid mécanique on utilise le procédé à cylindres de frappe, c'est-à-dire une action successive de frappes et de coups radiaux exercés sur l'ébauche (3) par des cylindres profilés ou non, pour ainsi obtenir un profilage intérieur et extérieur ou uniquement intérieur de l'ébauche (3).
  4. Procédé selon l'une quelconque des revendications 1 à 3,
    caractérisé en ce que
    suite à l'usinage de l'ébauche (3) les moyens d'usinage (6) sont avancés sur l'ébauche, au moins partiellement par complémentarité de formes, le mandrin (2) est ensuite retiré de l'ébauche (3), les moyens d'usinage (6) sont ensuite débrayés de la liaison par complémentarité de formes et l'ébauche (3) avec le dispositif de serrage (10) est amenée de la zone d'usinage dans la zone de chargement initiale, puis l'ébauche (3) usinée est amenée vers un dispositif de transfert ou enlevée de celui-ci, en débrayant le dispositif de serrage (10).
  5. Procédé selon l'une quelconque des revendications 1 à 4,
    caractérisé en ce que
    l'ébauche (3) est maintenue dans le dispositif de serrage (10) au moyen d'un dispositif de précontrainte, la précontrainte étant générée au moins partiellement à l'aide d'une force élastique.
  6. Procédé selon l'une quelconque des revendications 1 à 5,
    caractérisé en ce que
    la liaison entre la poupée primaire (1) et le dispositif de serrage (10) concernant le déplacement axial est réalisée par une liaison par complémentarité de formes et/ou de forces, et concernant la rotation par une liaison par complémentarité de formes et/ou de forces, de préférence au moyen d'un entraîneur (18) disposé dans le dispositif de serrage.
  7. Procédé selon l'une quelconque des revendications 1 à 6,
    caractérisé en ce que
    l'entraînement pour appliquer la force de traction sur la lance (8) pour le serrage de l'ébauche (3) dans le dispositif de serrage (10) ainsi que contre le mandrin (2) s'effectue sur la poupée primaire (1), de préférence par force hydraulique.
  8. Procédé selon l'une quelconque des revendications 1 à 7,
    caractérisé en ce qu'
    un remplacement éventuel du mandrin (2) entre différentes opérations d'usinage est effectué au moyen d'un dispositif de changement rapide.
  9. Dispositif pour réaliser le procédé selon l'une quelconque des revendications 1 à 8, comprenant une poupée primaire (1) et un mandrin (2) mobile axialement relié à celle-ci, une poupée secondaire (4) avec une station d'usinage stationnaire agissant radialement à l'axe de broche et munie d'outils de transformation à froid (6), la poupée secondaire (4) étant disposée axialement en face de la poupée primaire (1), un dispositif de serrage (10) disposé coaxialement à l'axe de broche primaire mobile par rapport à la station d'usinage, et la station d'usinage étant disposée de façon stationnaire entre la poupée primaire (1) et la poupée secondaire (4),
    caractérisé en ce qu'
    à l'intérieur du mandrin (2) est disposée mobile axialement et à symétrie d'axe une lance (8) qui présente une denture axiale dans la zone de tête (8') et des rainures périphériques radiales sur le front.
  10. Dispositif selon la revendication 9,
    caractérisé en ce qu'
    uniquement la poupée primaire (1) est munie d'un entraînement en rotation agissant de préférence de façon intermittente.
  11. Dispositif selon l'une des revendications 9 ou 10,
    caractérisé en ce que
    le dispositif de serrage (10) présente une jupe (11) cylindrique creuse, une pince de serrage (12) disposée dans celle-ci et un cône (13), qui peut être amené axialement en butée contre la pince de serrage (12) depuis la face intérieure.
  12. Dispositif selon l'une quelconque des revendications 9 à 11,
    caractérisé en ce que
    le dispositif de serrage (10) présente un piston de serrage (15) relié à une tige d'actionnement (16).
  13. Dispositif selon l'une quelconque des revendications 9 à 12,
    caractérisé en ce que
    le dispositif de serrage (10) présente un entraîneur de rotation (18) logé mobile axialement à l'intérieur du dispositif de serrage (10), dont une extrémité présente la forme d'un piston de serrage avec une surface extérieure conique et une surface intérieure profilée, de préférence avec des rainures périphériques.
EP03818481A 2003-09-05 2003-09-05 Procede et dispositif pour realiser des tubes au moins partiellement profiles Expired - Lifetime EP1660257B1 (fr)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
PCT/CH2003/000601 WO2005023454A1 (fr) 2003-09-05 2003-09-05 Procede et dispositif pour realiser des tubes au moins partiellement profiles

Publications (2)

Publication Number Publication Date
EP1660257A1 EP1660257A1 (fr) 2006-05-31
EP1660257B1 true EP1660257B1 (fr) 2007-11-07

Family

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Family Applications (1)

Application Number Title Priority Date Filing Date
EP03818481A Expired - Lifetime EP1660257B1 (fr) 2003-09-05 2003-09-05 Procede et dispositif pour realiser des tubes au moins partiellement profiles

Country Status (11)

Country Link
US (1) US7861572B2 (fr)
EP (1) EP1660257B1 (fr)
JP (1) JP4369424B2 (fr)
KR (1) KR101026007B1 (fr)
CN (1) CN100457319C (fr)
AT (1) ATE377467T1 (fr)
AU (1) AU2003257352A1 (fr)
CA (1) CA2538511C (fr)
DE (1) DE50308565D1 (fr)
ES (1) ES2295707T3 (fr)
WO (1) WO2005023454A1 (fr)

Families Citing this family (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102008034774A1 (de) 2008-07-25 2010-01-28 Bayerische Motoren Werke Aktiengesellschaft Wellenanordnung mit ineinander verschiebbaren inneren und äußeren Wellenelementen
DE102009052482A1 (de) * 2009-02-11 2010-08-19 Sms Meer Gmbh Verfahren und Vorrichtung zur Herstellung von rohrförmigen Werkstücken aus einen vorgelochten Hohlblock
KR101173869B1 (ko) * 2010-08-26 2012-08-14 삼성에스디아이 주식회사 스웨이징 장치
US9890808B2 (en) 2015-04-22 2018-02-13 American Axle & Manufacturing, Inc. Telescoping propshaft
US10213824B2 (en) * 2015-08-21 2019-02-26 Donald E. Mehalik Fastener removal tool and method of use
IT201700023064A1 (it) * 2017-03-01 2018-09-01 Danieli Off Mecc Laminatoio per la laminazione di elementi astiformi cavi o comunque concavi
CN108838266B (zh) * 2018-08-02 2024-04-16 中山市科力高自动化设备有限公司 一种管件塑形装置及旋压机
CN115284003B (zh) * 2022-08-03 2023-11-17 河北鑫芳盛管道设备有限公司 一种异形管件加工方法

Family Cites Families (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3422518A (en) 1967-10-20 1969-01-21 Valley Metallurg Processing Method of reforming tubular metal blanks into inner-fin tubes
FR2191957B1 (fr) * 1972-07-10 1975-03-07 Glaenzer Spicer Sa
AT322329B (de) 1973-12-04 1975-05-12 Gfm Fertigungstechnik Schmiedemaschinen zum herstellen insbesondere von schrotläufen
CH579427A5 (fr) 1975-02-24 1976-09-15 Grob Ernst Fa
CH670782A5 (fr) * 1986-08-19 1989-07-14 Grob Ernst Fa
CH675840A5 (fr) 1988-10-05 1990-11-15 Grob Ernst Fa
CH686817A5 (de) * 1992-03-04 1996-07-15 Grob Ernst Fa Vorrichtung und Verfahren zum Herstellen eines wenigstens innen gerade oder schraeg zur Werkstueckachse profilierten hohlen Werkstuecks.
DE10217848A1 (de) * 2002-04-22 2003-11-06 Hay Tec Automotive Gmbh & Co K Verfahren zur Herstellung von Schiebemuffen für Schaltgetriebe

Also Published As

Publication number Publication date
DE50308565D1 (de) 2007-12-20
CN100457319C (zh) 2009-02-04
JP2007506552A (ja) 2007-03-22
US20070271986A1 (en) 2007-11-29
EP1660257A1 (fr) 2006-05-31
AU2003257352A1 (en) 2005-03-29
WO2005023454A1 (fr) 2005-03-17
ATE377467T1 (de) 2007-11-15
ES2295707T3 (es) 2008-04-16
JP4369424B2 (ja) 2009-11-18
KR20060037459A (ko) 2006-05-03
CA2538511C (fr) 2010-12-21
CN1826192A (zh) 2006-08-30
US7861572B2 (en) 2011-01-04
KR101026007B1 (ko) 2011-03-30
CA2538511A1 (fr) 2005-03-17

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