EP1256395B1 - Dispositif pour réaliser des ondulations annulaires sur un tube métallique - Google Patents

Dispositif pour réaliser des ondulations annulaires sur un tube métallique Download PDF

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Publication number
EP1256395B1
EP1256395B1 EP02009919A EP02009919A EP1256395B1 EP 1256395 B1 EP1256395 B1 EP 1256395B1 EP 02009919 A EP02009919 A EP 02009919A EP 02009919 A EP02009919 A EP 02009919A EP 1256395 B1 EP1256395 B1 EP 1256395B1
Authority
EP
European Patent Office
Prior art keywords
clamping unit
clamping
unit
piston
cylinder
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
EP02009919A
Other languages
German (de)
English (en)
Other versions
EP1256395A2 (fr
EP1256395A3 (fr
Inventor
Rainer Prange
Matthias Leifels
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.)
Benteler Automobiltechnik GmbH
Original Assignee
Benteler Automobiltechnik 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 Benteler Automobiltechnik GmbH filed Critical Benteler Automobiltechnik GmbH
Publication of EP1256395A2 publication Critical patent/EP1256395A2/fr
Publication of EP1256395A3 publication Critical patent/EP1256395A3/fr
Application granted granted Critical
Publication of EP1256395B1 publication Critical patent/EP1256395B1/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
    • B21D—WORKING OR PROCESSING OF SHEET METAL OR METAL TUBES, RODS OR PROFILES WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21D15/00—Corrugating tubes
    • B21D15/04—Corrugating tubes transversely, e.g. helically
    • B21D15/10—Corrugating tubes transversely, e.g. helically by applying fluid pressure

Definitions

  • An apparatus for producing transverse waves on a metal tube counts by the DE 28 51 944 C2 to the state of the art a total of three hydraulically actuated piston-cylinder units are arranged within a housing.
  • This is a piston-cylinder unit of the fixing of a metal tube, another piston-cylinder unit of generating a transverse shaft on the metal tube and the third piston-cylinder unit serves to advance the provided with a transverse metal tube to a transverse wave pitch.
  • the housing is further penetrated by a central channelized core pin having a pin piston at the free end. This cooperates with the longitudinal axis of the core pin radially adjustable mold jaws to form the transverse waves as components of a clamping unit.
  • the state of the art also includes the DE 30 04 838 A1 ,
  • a transverse wave packet is produced in one operation.
  • the process of Querwellung is not exactly controllable. It comes repeatedly to tilting of the transverse shaft pulleys and thus to rejects.
  • the invention is - based on the prior art - the object of the invention to provide a device for the production of transverse waves on a metal pipe, which is simple and inexpensive to produce and easy to use and which can also be quickly converted.
  • An essential feature of the invention is the reduction of the previously required number of piston-cylinder units to a single feed cylinder. With the help of this feed cylinder, which is easily accessible and thus easy to maintain, now both the upsetting process for generating a transverse shaft and axial displacement of the metal tube can be performed after generating a transverse wave.
  • the fixing of the metal tube on the clamping piston of the tubular mandrel is carried out by part of a clamping unit (hereinafter referred to as 2nd clamping unit) forming holding tools, which are radially displaceable to the center axis of the second clamping unit and thus easily accessible and easy to maintain.
  • 2nd clamping unit a clamping unit
  • the second tensioning unit can be displaced without jamming by means of the feed cylinder at two longitudinal guides extending at a distance next to each other.
  • the longitudinal guides extend between an abutment bracket and a 1. clamping unit with tools for the transverse shafts.
  • clamping unit extends coaxially to the central axis of the displaceable second clamping unit.
  • the coupled with the 2nd clamping unit pipe mandrel is slidably displaceable on an inner mandrel, which is fixed to the abutment console and end has a support piston, which cooperates with the forming tools.
  • Both clamping units are identical except for the forming and holding tools, so that there is a manufacturing simplification.
  • a metal tube is introduced via the abutment bracket facing away from the side of the stationary 1st clamping unit through this and the displaceable second clamping unit with radially outwardly displaced forming and holding tools.
  • the axial distance between the two clamping units is matched to the width and the diameter of the transverse shaft to be generated.
  • the forming and holding tools are displaced radially inwardly until the metal tube is clamped on the one hand between the clamping piston of the tubular mandrel and the holding tools and on the other hand between the support piston and the molds.
  • pressurized fluid is introduced into the mold space between the clamping piston, the inner mandrel, the pipe mandrel and the metal pipe via the inner mandrel, and at the same time the second clamping unit is moved in the direction of the 1st clamping unit. In this case, then forms the transverse wave according to the contour of the molds and possibly also of the holding tools.
  • the pressure in the mold cavity is reduced and then the molds and the holding tools are displaced radially outward. Thereafter, the 2nd clamping unit is moved by the amount in the direction of the abutment console, as material on the metal tube to form a new cross-shaft is required. This is followed by the movement processes, as they have been explained above to generate a transverse wave.
  • the longitudinal guides for the 2nd clamping unit may consist of tubes or rods circular or circular cross-section. But also conceivable are polygonal cross sections. Accordingly, the guide recesses are then designed in the second clamping unit.
  • An advantageous embodiment of the device according to the invention consists in the features of claim 2. Thereafter, both the molds of the 1st clamping unit and the holding tools of the 2nd clamping unit in each 90 ° offset circumferentially the central axes of the clamping units in sliding jaws releasably secured, of which each sliding jaw is connected to a hydraulically actuated clamping cylinder.
  • Such a design leads to a further simplification with regard to identical components.
  • a change in the transverse waves is possible only by replacing the forming and holding tools. In this case, it is entirely conceivable that transverse waves with an omega-shaped cross-section can be generated without problems. Due to the 90 ° displacement of the molds circumferentially the center axis of the 1st clamping unit, these can be easily made, yet over the entire circumference a positive connection with the outer surface of the metal tube is achieved.
  • the feed cylinder can be acted upon so that the 1st and the 2nd clamping unit can be driven far enough apart.
  • the second clamping unit is connected via two longitudinal struts with a traversed by the longitudinal guides Traverse, from which the pipe mandrel into the 2nd Tensioning unit extends.
  • the longitudinal struts can preferably made of narrow edgewise Bars are formed, which extend between the 2nd tensioning unit and also formed from an upright ledge Traverse.
  • the connection is preferably by welding.
  • the tubular mandrel is detachably attached to the traverse. His tensioning piston lies within the holding tools. The axial length of the clamping piston is placed on the width of the holding tools. The area between the clamping piston and the traverse of the tubular mandrel is kept smaller in diameter.
  • the Traverse has adapted to the longitudinal guides recesses for proper displacement of the second tensioning unit.
  • This displacement measuring unit may e.g. consist of a parallel to the longitudinal guides extending rod which passes through a magnetic coil on the 2nd clamping unit, so that always the position of the 2nd tensioning unit and also the distance traveled by this path can be determined.
  • a particularly advantageous embodiment of the invention is seen in the features of claim 5. Thereafter, the feed cylinder, the clamping cylinder of the two clamping units and the Wegmesshow are coupled with a respect to the parameter deformation time, deformation pressure and path and speed of the second tensioning unit programmable electro-hydraulic control unit.
  • the deformation process of a transverse shaft can thus proceed with respect to the parameters deformation time, deformation pressure and path and speed of the second clamping unit according to a predetermined program and be changed at any time by a desired program change.
  • FIGS. 1 to 4 illustrate a device 1 for producing transverse waves on a metal tube 2.
  • the metal tube 2 may be made of steel. However, other materials are also conceivable.
  • the device 1 comprises two clamping units 3, 4 arranged on a base frame GG.
  • the clamping units 3, 4 are of star-shaped design, with clamping cylinders 5 which are acted upon hydraulically in a 90 ° offset on the circumference.
  • the clamping cylinder 5 are connected in a manner not shown with the central axes 6, 7 of the clamping units 3, 4 movable sliding blocks 8.
  • the sliding blocks 8 are indicated in the figure 1.
  • the two clamping units 3, 4 are identical.
  • a first clamping unit 3 is detachably mounted on the base frame GG.
  • This 1. clamping unit 3 is about two parallel spaced apart longitudinal guides 9 in the form of guide rods connected to an abutment bracket 10, which is also detachably mounted on the base GG.
  • the second clamping unit 4 is displaced.
  • the second clamping unit 4 is connected via two spaced apart, upstanding Asked strip-like longitudinal struts 11 connected to a cross member 12, which is also forcibly displaced on the longitudinal guides 9 and consists of an edgewise bar.
  • a hydraulically actuated feed cylinder 13 with its cylinder housing 14 is releasably fixed to the base frame GG.
  • the piston rod 15 of the feed cylinder 13 is struck by a connecting joint 16 to the second clamping unit 4.
  • the tubular mandrel 17 slides on an inner mandrel 19 which extends from the abutment bracket 10 through the 2nd clamping unit 4 to the 1st clamping unit 3.
  • the diameter of the inner mandrel 19 is increased and the end portion is formed as a support piston 20.
  • the support piston 20 has a cylindrical length region 21 and an upstream conical length region 22 (FIGS. 5 to 11).
  • the clamping piston 18 cooperates with holding tools 23 which are releasably secured in the sliding jaws 8 of the second clamping unit 4 and the end face are adapted to the outer contour of the metal tube 2.
  • the support piston 20 cooperates with molds 23 which are releasably secured in the sliding blocks 8 of the 1st clamping unit 3.
  • the molds 24 have segment-like webs 25, which are rounded frontally.
  • the segment webs 25 enclose the metal pipe 2 to be deformed over the entire circumference, as can be seen in particular from FIG. Due to the shape of the segment webs 25 and the recesses 26 in the forming tools 24 lying next to the segment webs 25, transverse waves 27 can be generated on the metal pipe 2 in connection with the holding tools 23, as can be seen in particular from FIG.
  • the inner mandrel 19 is provided with a longitudinal channel 28, which is connected via the abutment bracket 10 to a high-pressure hydraulic source 29, as shown schematically in FIG.
  • a transverse channel 30 Adjacent to the support piston 20 on the inner mandrel 19, at least one transverse channel 30 is provided, which passes through the entire wall thickness of the inner mandrel 19 and is connected to the longitudinal channel 28 fluidüber faced.
  • the displacement measuring unit 31 comprises a rod 32 which extends almost to the first clamping unit 3 and passes through a magnetic coil 33 on the second clamping unit 4.
  • the hydraulic source 34 for the feed cylinder 13 and the clamping cylinder 5 can be seen in FIG.
  • the feed cylinder 13, the clamping cylinder 5 and the displacement measuring unit 31 are coupled in a manner not shown in Figure 1 with respect to the parameter deformation time, deformation pressure and path and speed of the 2nd clamping unit 4 programmable electro-hydraulic control unit 35, based on the base frame GG is located.
  • the fixation is shown schematically in the figure 5 by the arrows PF.
  • the well space 36 is relieved of pressure via the transverse channel 30 and the longitudinal channel 28. Thereafter, the holding tools 23 are displaced radially outward relative to the center axis 7 of the second clamping unit 4 in accordance with the arrow PF2 of FIG. The metal tube 2 is then no longer clamped between the clamping piston 18 and the holding tools 23.
  • the forming tools 24 of the first clamping unit 3 are displaced radially outwards relative to the central axis 6 (arrow PF4 according to FIG. 9) and at the same time the holding tools 23 of the second clamping unit 4 are displaced radially inwardly relative to the central axis 7 again.
  • the metal tube 2 is clamped again between the holding tools 23 and the clamping piston 18 on the tubular mandrel 17. This too is again illustrated by the arrow PF5 in FIG.
  • the second clamping unit 4 is then displaced according to the arrow PF6 of FIG. 10 while the first clamping unit 3 is still open in the direction of the first clamping unit 3, specifically until the segment webs 25 of the forming tools 24 According to the arrow PF7 of FIG. 10, it is possible to grasp behind the generated transverse shaft 27 when the forming tools 24 according to FIG. 5 are again displaced relative inwardly relative to the central axis 6 of the first clamping unit 3 and fix the metal tube 2 to the supporting piston 20.

Landscapes

  • Physics & Mathematics (AREA)
  • Fluid Mechanics (AREA)
  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Shaping Metal By Deep-Drawing, Or The Like (AREA)
  • Clamps And Clips (AREA)
  • Bending Of Plates, Rods, And Pipes (AREA)
  • Jigs For Machine Tools (AREA)
  • Heat Treatment Of Articles (AREA)

Claims (5)

  1. Dispositif pour réaliser des ondulations transversales (27) sur un tube métallique (2), qui présente deux appareils de serrage (3,4) dirigés de façon coaxiale entre eux par rapport à leurs axes médians (6,7) pour le tube métallique (2), dont un premier appareil de serrage (3) comportant des outils de formage déplaçables radialement par rapport à son axe médian (6) est fixé sur un châssis d'embase (GG) et, par l'intermédiaire de deux guidages longitudinaux (9) se déplaçant selon un espacement parallèle entre eux pour le deuxième appareil de serrage (4) déplaçable coaxialement par rapport au premier appareil de serrage (3), est raccordé à une console de butée (10) fixée également sur le châssis d'embase (GG), le deuxième appareil de serrage (4), comportant des outils de support (23) déplaçables radialement par rapport à son axe médian (7) et fixé sous l'influence d'un vérin d'avance (13) actionné hydrauliquement fixé sur le châssis d'embase (GG) au-dessous des guidages longitudinaux (9), est accouplé à un mandrin tubulaire central (17) qui comporte un piston de serrage (18) qui est guidé de façon coulissante par un piston de support d'extrémité (20) sur un mandrin intérieur (19) raccordable à une source de pression hydraulique (29), canalisé, s'étendant depuis la console de butée (10) à travers le deuxième appareil de serrage (4) jusque dans le premier appareil de serrage (3).
  2. Dispositif selon la revendication 1, dans lequel aussi bien les outils de formage (24) du premier appareil de serrage (3) que les outils de support (23) du deuxième appareil (4) sont fixés de façon amovible avec un décalage respectivement de 90° sur la périphérie des axes médians (6,7) des appareils de serrage (3,4) dans des mâchoires coulissantes (8), dont chaque mâchoire coulissante (8) est raccordée à un vérin de serrage (5) actionné hydrauliquement.
  3. Dispositif selon la revendication 1 ou 2, dans lequel le deuxième appareil de serrage (4) est raccordé par deux entretoises longitudinales (11) à l'une des traverse (12) traversée par les guidages longitudinaux (9), à partir duquel le mandrin tubulaire (17) s'étend jusqu'au deuxième appareil de serrage (4).
  4. Dispositif selon les revendications 1 à 3, dans lequel le deuxième appareil de serrage (4) est accouplé à une unité de mesure de course (31).
  5. Dispositif selon la revendication 4, dans lequel le vérin d'avance (13), le vérin de serrage (5) et l'unité de mesure de course (31) sont couplés à une unité de commande électro-hydraulique (35) programmable à l'égard des paramètres de temps de déformation, pression de déformation ainsi que course et vitesse du deuxième appareil de serrage (4).
EP02009919A 2001-05-10 2002-05-03 Dispositif pour réaliser des ondulations annulaires sur un tube métallique Expired - Lifetime EP1256395B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE10122763A DE10122763B4 (de) 2001-05-10 2001-05-10 Vorrichtung zur Herstellung von Querwellen an einem Metallrohr
DE10122763 2001-05-10

Publications (3)

Publication Number Publication Date
EP1256395A2 EP1256395A2 (fr) 2002-11-13
EP1256395A3 EP1256395A3 (fr) 2004-05-19
EP1256395B1 true EP1256395B1 (fr) 2007-08-08

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ID=7684313

Family Applications (1)

Application Number Title Priority Date Filing Date
EP02009919A Expired - Lifetime EP1256395B1 (fr) 2001-05-10 2002-05-03 Dispositif pour réaliser des ondulations annulaires sur un tube métallique

Country Status (3)

Country Link
EP (1) EP1256395B1 (fr)
AT (1) ATE369218T1 (fr)
DE (2) DE10122763B4 (fr)

Family Cites Families (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2954064A (en) * 1950-11-10 1960-09-27 Solar Aircraft Co Machine for forming ring reinforced convolutions in a tube
US3247694A (en) * 1962-01-25 1966-04-26 Calumet & Hecla Method and means for forming corrugations on tubing
US3512385A (en) * 1966-07-12 1970-05-19 Ametek Inc Bellows forming machine
DE2851944C2 (de) * 1978-12-01 1984-09-13 Benteler-Werke AG, 4790 Paderborn Vorrichtung zur Herstellung von Rohrkörpern mit axial aufeinanderfolgenden Querwellen
JPH02290626A (ja) * 1989-04-27 1990-11-30 Nhk Spring Co Ltd 金属ベローズの製造方法および製造装置

Also Published As

Publication number Publication date
EP1256395A2 (fr) 2002-11-13
DE50210623D1 (de) 2007-09-20
EP1256395A3 (fr) 2004-05-19
ATE369218T1 (de) 2007-08-15
DE10122763A1 (de) 2002-11-21
DE10122763B4 (de) 2007-10-04

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