EP2446980B1 - Tuyau d'échafaudage et procédé destiné au traitement d'extrémités de tuyaux - Google Patents

Tuyau d'échafaudage et procédé destiné au traitement d'extrémités de tuyaux Download PDF

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Publication number
EP2446980B1
EP2446980B1 EP11003493.1A EP11003493A EP2446980B1 EP 2446980 B1 EP2446980 B1 EP 2446980B1 EP 11003493 A EP11003493 A EP 11003493A EP 2446980 B1 EP2446980 B1 EP 2446980B1
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EP
European Patent Office
Prior art keywords
tube
section
cross
support sleeve
bead
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.)
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Application number
EP11003493.1A
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German (de)
English (en)
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EP2446980A3 (fr
EP2446980A2 (fr
Inventor
Erich Spreitzer
Martin Leichtfried
Martin Kirchweger
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.)
WELSER PROFILE AUSTRIA GmbH
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WELSER PROFILE AUSTRIA GmbH
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Priority to PL11003493T priority Critical patent/PL2446980T3/pl
Priority to DE201110101326 priority patent/DE102011101326A1/de
Publication of EP2446980A2 publication Critical patent/EP2446980A2/fr
Publication of EP2446980A3 publication Critical patent/EP2446980A3/fr
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Publication of EP2446980B1 publication Critical patent/EP2446980B1/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
    • B21D41/00—Application of procedures in order to alter the diameter of tube ends
    • B21D41/04—Reducing; Closing
    • 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
    • B21D17/00—Forming single grooves in sheet metal or tubular or hollow articles
    • B21D17/02—Forming single grooves in sheet metal or tubular or hollow articles by pressing
    • B21D17/025—Forming single grooves in sheet metal or tubular or hollow articles by pressing by pressing tubes axially
    • E—FIXED CONSTRUCTIONS
    • E04—BUILDING
    • E04G—SCAFFOLDING; FORMS; SHUTTERING; BUILDING IMPLEMENTS OR AIDS, OR THEIR USE; HANDLING BUILDING MATERIALS ON THE SITE; REPAIRING, BREAKING-UP OR OTHER WORK ON EXISTING BUILDINGS
    • E04G7/00—Connections between parts of the scaffold
    • E04G7/30—Scaffolding bars or members with non-detachably fixed coupling elements
    • E04G7/301—Scaffolding bars or members with non-detachably fixed coupling elements for connecting bars or members which are parallel or in end-to-end relation

Definitions

  • the invention relates to a scaffolding tube according to the preamble of claim 1 and a method for machining pipe ends by plastic cold forming according to the preamble of claim 7.
  • the taper for example by rotating rollers or by pulling the tube by means of a molded sleeve, also called die or Einziehwerkmaschine be generated.
  • a molded sleeve also called die or Einziehtechnikmaschinemaschine
  • it is off DE 20 2008 017 196 U1 a device for retracting a pipe end known.
  • the mold sleeve in which the pipe end is pressed in the axial direction, is conically tapered on the inside, so that after the Einziehvorgang a conically formed transition region between the tapered pipe end and the non-tapered pipe. This has the consequence that a tube that is attached to the tapered end of the tube, does not rest on a smooth bearing surface.
  • Scaffolding tubes with a bead between the tapered tube end and the undeformed tube have the disadvantage that they can not be pushed through retaining clips, for example, due to the radially outwardly projecting bead, which are only loosened and not fully opened for mounting or dismounting a scaffold. Also, there may be other applications requiring the passage of a scaffolding tube through an opening that substantially matches the outside diameter of the undeformed tube. This is not possible with pipes having an outwardly projecting bead.
  • scaffold tubes with a bulge created by compression provide a good axial bearing surface for an attached tube
  • the load transfer into the undeformed region of the tube above the bead is not optimal.
  • the bead forms a kind of resilient element between the axial bearing surface and the undeformed region of the scaffolding tube.
  • For larger axial forces, which act on a system of several assembled scaffolding tubes it may also happen that the bead between the axial bearing surface and undeformed tube area is further compressed. On the one hand, this leads to a change in length of the scaffold tube, on the other hand, this can also cause the mated tubes can not be pulled apart or clamp due to the deformation.
  • WO 2005/021326 A2 There is known a canted tube which serves to secure a bumper and is adapted to absorb energy by deformation.
  • the overturn tube comprises a larger diameter section and a smaller diameter section thereafter. The two sections are connected by a double fold.
  • the double fold is a loose double fold whose folds do not lie directly against each other.
  • the portion of the smaller diameter tube plunges into the portion of the larger diameter tube with continuous deformation of the double seam.
  • the tube should also be easy to manufacture and cheap to manufacture. It is a further object of the present invention to provide a method for producing such a pipe or for machining pipe ends.
  • the object is solved by the features of independent claim 1 of the present invention.
  • the invention is based on a scaffolding tube having a first section and having a second section adjoining the first section, wherein the first section has a first cross section with a first outer contour and a first inner contour, and the second section has a second cross section with a second outer contour and have a second inner contour. Furthermore, the second section can be inserted into a tube whose cross section corresponds to the first cross section. According to the invention, it is provided that the first section and the second section are integrally connected to one another via a double fold, wherein the fold layers of the double fold abut one another directly.
  • the solution according to the invention offers the advantage that a precisely defined axial contact surface exists between the tapered second section and the unrestrained first section. Due to the double fold, whose folds lie directly against one another, it is further ensured that the tube in the region of the double fold is not significantly widened beyond the outer contour of the first section. The tube can therefore be inserted through openings which correspond in their cross-section substantially to the outer circumference of the tube. Due to the fact that the folds of the double fold lie directly against each other, an optimal load transfer is ensured. The double fold can hardly be deformed by axially acting forces under normal use. By integral connection between the first portion and the second portion is meant that the first portion and second portion are not connected by a weld or other joint, but consist of a single continuous tube.
  • the scaffold tube according to the invention is easy to manufacture and inexpensive to manufacture.
  • the scaffold tube according to the invention consists of metal, preferably of steel.
  • the tube is a hollow cylindrical tube, but also tubes with different cross-section, such as a rectangular cross-section with rounded corners are conceivable.
  • the tube of the invention may also have a poligonal cross-section.
  • the tube in the region of the double fold has an outer contour which substantially corresponds to the first outer contour. If the tube in the region of the double fold has only a slightly larger outer contour than the undeformed first section of the tube, then the tube can be pushed through loosened fastening tube clamps. It is particularly advantageous if the outer contour in the region of the double fold exactly corresponds to the first outer contour and thus the tube is wider at no point than in the area of the undeformed first section.
  • the second outer contour corresponds to the first inner contour minus a small clearance. This ensures that nested tubes have a good fit and at the same time it is possible to easily insert the tubes into each other and pull apart.
  • the second section represents one end of the tube and is chamfered on the outside at the free end.
  • the chamfer facilitates nesting of the tubes.
  • the second portion has a free end, wherein an at least partially plate-shaped component with a front, a back and a passage opening is fitted onto the second portion, so that the second portion penetrates the passage opening and the Front side of the component abuts a formed by the double fold axial stop of the tube, and further wherein the free end of the second portion is flanged radially outwardly on the back of the component.
  • another component can be fixed at the end of the tube, wherein a simple, stable and extremely accurate fixation of the additional component is possible. Due to the axial stop, which is formed by the double seam, a precise alignment of the tube can be ensured perpendicular to the plane of the partially plate-shaped member.
  • a positive connection between the tube and additional component in the axial direction is achieved.
  • a high contact pressure when crimping the free end of the second portion on the back of the additional component can also be an additional adhesion between the pipe and the additional Component can be achieved.
  • the passage opening in the additional area-wise plate-shaped component is preferably formed so that there is a slight clearance between the passage opening and the outer contour of the second section. As a result, the additional component can be attached easily and without great effort to the second section of the tube. Between the passage opening of the additional component and the second portion of the tube may also be a press fit.
  • the length of the second portion of the tube is dimensioned so that the radially outwardly flanged on the back of the component free end terminates at least with the outer contour of the cross section of the first portion or even slightly more radially outwardly protrudes. This ensures a secure and stable cohesion between the pipe and the additional component.
  • the at least partially plate-shaped component is a base plate of a ceiling support.
  • the scaffolding tube according to the invention is itself designed as a ceiling support in this case, wherein the base plate of the ceiling support is simple, inexpensive, stable and extremely precise attached to the pipe end.
  • the beading of the free end of the second portion on the back of the additional component is preferably carried out by rolling over the protruding over the back of the plate-shaped member portion of the second portion.
  • the invention further provides a method for processing pipe ends by cold plastic working, by which in particular the above-described invention scaffolding tube can be prepared.
  • the method according to the invention comprises a plurality of method steps.
  • a first method steps the end of a tube is drawn in, so that the tube after the drawing process has an undeformed first section with a first cross section, a second section deformed by the insertion process with a second cross section, and a transition between the first section and the second section wherein the second cross section is smaller than the first cross section.
  • the first method step therefore, only a first tapering of the pipe end takes place.
  • an outward circumferential bead is produced in a region of the first section immediately adjacent to the transition by swaging the tube in this region.
  • the bead is folded over the transition in the direction of the free end of the second portion, so that a double seam is formed, via which the first portion is connected to the second portion.
  • the outer contour of the tube in the region of the double fold substantially corresponds to the outer contour of the first section. Furthermore, this also ensures that the folds of the double fold abut each other directly.
  • a clearly defined axial abutment surface is created for a tube plugged onto the tapered section of the tube. Furthermore, the method according to the invention provides a tube with a tapered end, which ensures optimum axial force introduction via the axial bearing surface. The method according to the invention can be carried out extremely quickly and enables simple and cost-effective production. At the same time, the manufacturing tolerances are very low.
  • a mold sleeve is used for the insertion process, the inner contour is tapered in the axial direction, wherein the mold sleeve is pressed onto the tube for pulling the pipe end in the axial direction.
  • Such mold sleeves are known from the prior art and are also referred to as dies or Einziehtechnikmaschinee or dies. With a molded sleeve, the pipe end can be rejuvenated extremely quickly and precisely.
  • the second portion of the tube for generating the bead is supported on the outside by a support sleeve, which is driven to produce the bead on the second portion and at least a portion of the first portion, wherein in the inner contour of the support sleeve Is formed in the region of the bead to be produced a circumferential groove, in which bulges the bead during the upsetting operation to the outside.
  • the support sleeve ensures that the tube is compressed such that the bead forms in a clearly defined area.
  • the shape of the bead can be suitably specified by the geometry of the circumferential groove.
  • the upsetting operation is carried out by means of a mandrel, with which an axially directed pressing force is exerted on the free end of the second section.
  • the turning over of the bead takes place by pulling off the support sleeve in the direction of the free end of the second portion, wherein the free end is axially supported by the mandrel.
  • the support sleeve also forms the tool for the process step of turning over the bead.
  • the support sleeve has a first end and a second end, wherein the first end of the support sleeve is located during the compression process in the region of the first portion, and wherein the groove is formed such that the inner contour of the support sleeve starting is tapered ramp-like from a maximum cross section of the groove in the direction of the first end.
  • the pipe to be machined is a hollow-cylindrical pipe
  • the ramp-like taper is a conical taper of the inner contour of the support sleeve.
  • the ramp-like taper allows easy removal of the support sleeve and a precise turning of the bead produced in the previous process step.
  • the ramp-like taper makes the support sleeve to a calibration tool with which the outer contour defined in the region of the generated double fold can be returned to an exact diameter, for example the outer diameter of the undeformed tube.
  • the angle of the ramp-like taper to the longitudinal axis of the support sleeve is preferably a maximum of 15 degrees. As a result, the removal of the support sleeve is particularly facilitated.
  • the outer contour in the region of the double rebate can essentially be returned to the outer contour of the undeformed tube in the region of the first section.
  • the cross section of the inner contour at the first end of the support sleeve corresponds to the outer cross section of the first portion of the tube plus a small clearance.
  • the drawing-in process and the upsetting process take place in a single process step, with the mold sleeve and the support sleeve being combined to form a single tool.
  • the mold sleeve and the support sleeve being combined to form a single tool.
  • the tube must be supported axially for processing by the method according to the invention during the drawing-in process and the compression process in the region of the first section.
  • the tube 1 comprises a first portion 10 and a second portion 20, which are connected to each other via a double seam 30.
  • the tube is a hollow cylindrical scaffolding tube whose end is tapered and formed by the second section 20. It should be noted that the invention is not limited to the hollow cylindrical tube shown. Also conceivable would be other deviating from the hollow cylindrical shape cross sections such as oval, triangular, rectangular or other poligone cross sections.
  • the second section 20 of the tube 1 is tapered such that a tube of the same type with the wider side can be plugged onto this second section 20.
  • the outer diameter of the tapered portion 20 must be to be slightly smaller than the inner diameter of the first portion 10 so that there is little play between the nested tubes. The play ensures that the pipes can simply be plugged into each other and pulled apart.
  • the tube is further chamfered at the free end 7 of the second portion 20 by a chamfer 40, whereby the nesting of the tubes is facilitated.
  • Fig. 1 it is shown that the second portion 20 has a continuous transverse bore 8 into which a bolt can later be inserted for locking the nested tubes.
  • the other tube, not shown, must also have a hole to do so.
  • Fig. 3 showing a longitudinal section through the tube 1, the double seam 30, via which the first portion 10 is connected to the second portion 20, shown in more detail.
  • the double fold 30 consists of the three fold layers 2, 3 and 4, which abut each other directly.
  • the outer fold layer 4 is the extension of the first portion 10 of the tube 1.
  • the middle fold layer 3 abuts against the inner contour 11 of the first portion 10 and is connected both to the outer layer 4 and the inner layer 2 in one piece and without a joint.
  • the inner fold layer 2 in turn merges into the second section 20 of the tube 1.
  • the outer contour 22 of the second section lies in the region of the double fold 30 directly against the middle fold layer 3.
  • the constant diameter of the outer contour 12 of the first portion 10 is slightly widened before the double fold 30, as well as the constant diameter of the inner contour 21 of the second portion 20 is slightly tapered in front of the double fold 30. It is thereby achieved that the outer diameter of the second section 20 approximately corresponds to the inner diameter of the first section 10, although between the two sections in the region of the double fold 30, the middle fold layer 3 is arranged.
  • the Fig. 4 shows a molded sleeve 50 by means of which the tube end of an initially undeformed tube 1 'is drawn with a constant diameter.
  • the inner contour 51 of the rotationally symmetrical molded sleeve 50 has an opening 57 into which the tube 1 'is inserted for the Einziehvorgang.
  • the inner contour 51 of the molded sleeve 50 initially has a cylindrical region 52. In this cylindrical portion 52, the tube 1 'is guided only. The diameter of the cylindrical portion 52 therefore corresponds approximately to the outer diameter of the undeformed tube 1 'or is slightly larger.
  • the inner contour 51 of the molded sleeve 50 is tapered.
  • the outer diameter of the tube 1 ' is brought to the desired outer diameter of the later second section 20.
  • the already tapered part of the tube 1 'introduced into the mold sleeve 50 is guided or radially supported after the taper 53 with the aid of the guide sleeves 54, 55 and 56. This avoids undesirable deformation, for example, bending of the tapered portion of the pipe 1 ', which may occur due to machining.
  • the intermediate product achieved by the process step described above is in Fig. 5 shown.
  • the tube 1 'now has a first section 10 and a second section 20, which already correspond in their cross section to the finished tube.
  • First section 10 and second section 20 are interconnected by a tapered transition 5.
  • the in Fig. 5 shown intermediate in the in Fig. 6 shown support sleeve 60 introduced.
  • either the pipe can be moved in the axial direction when the support sleeve 60 is stationary. It is also possible to hold the tube and drive the support sleeve 60 on the pipe end.
  • the inner contour 61 of the support sleeve 60 is divided into several sections. At the first left end 63, the cross section of the inner contour 61 corresponds to the later outer diameter of the double fold 30 of the tube 1. This diameter corresponds either to the outer diameter of the first section 10 or is slightly larger.
  • the inner contour 61 further has a groove 62, wherein the inner contour is tapered starting from this groove 62 in the direction of the first end 63 ramp-like or conical.
  • This conical taper is designated by the reference numeral 65.
  • the inner contour 61 substantially corresponds to the outer contour 22 of the second portion 20 of the tube 1 '.
  • the inner contour 61 has a second conical taper 67, by the chamfer 40 is generated at the free end 7 of the subsequent tube when inserting the tube 1 'in the support sleeve 60.
  • this second conical taper 67 ends a coaxial with the support sleeve 60 arranged support mandrel 70.
  • This support mandrel 70 is exerted on the free end 7 of the inserted into the support sleeve 60 tube 1 'an axial pressing force.
  • the length of the support sleeve 60 is dimensioned such that the in Fig. 5 shown conical transition 5 between the first portion 10 and the second portion 20 in the region of the groove 62 of the inner contour 61 comes to rest. Due to the axial pressing force, the tube 1 'is compressed in the region of the transition 5, so that in the groove 62 of the in Fig. 7 shown bead 6 is formed.
  • the in Fig. 6 shown support sleeve 60 withdrawn to the right of the tube 1 '.
  • the mandrel 70 remains unchanged while in position and supports the free end 7 of the tube 1 'in the axial direction.
  • the ramp-like taper 65 By removing the support sleeve 60 of the in Fig. 7 shown bead 6 by the ramp-like taper 65 in the inner contour 61 of the support sleeve 60 is transposed over the shortened transition 5 to the right, so that in Fig. 3 shown double seam 30 with the adjacent folded layers 2, 3 and 4 is formed.
  • the ramp-like conical taper 65 has with respect to the longitudinal axis 66 of the support sleeve 60 preferably at an angle of at most 15 degrees.
  • the in Fig. 6 shown support sleeve to a certain length of the tapered portion can also be used as a molded sleeve.
  • the drawing of the pipe end and the production of the circumferential bead by compression of the tube can then be done in one operation. In addition, only a single tool is required.
  • the Fig. 8 and 9 show an inventive tube 1, which is designed as a ceiling support.
  • the pipe end of the pipe 1 is formed substantially the same as the pipe according to the Fig. 1 to 3 and also includes a first portion 10 having a larger diameter and a second portion 20 having a smaller diameter.
  • a plate 80 is fixed, which forms a base plate and thus a foot of a ceiling support.
  • the second portion 20 of the tube 1 is slightly shorter for the purpose of securing the base plate 80 as in the embodiment of Fig. 1 to 3 executed.
  • the base plate 80 is attached to the second portion 20 of the tube 1, so that the second portion 20 penetrates a passage opening 83 of the base plate 80.
  • the passage opening 83 corresponds in its diameter substantially to the outer diameter of the second portion 20, wherein a slight clearance between the second portion 20 and the passage opening 83 is provided to allow easy attachment of the base plate 80 to the second portion 20.
  • the base plate 80 abuts in the axial direction with its front side 81 against an axial stop 31, which is formed by the double fold 30 of the tube 1.
  • the free end 7 of the second portion 20 is flanged radially outwardly on the back 82 of the plate 80.
  • the length of the second portion 20 is dimensioned such that the free flanged end 7 extends in the radial direction at least as far outward as the axial stop 31 on the opposite front side 81 of the base plate 80.
  • the base plate 80 is arched to the through hole 83, so that the flanged free end 7 of the second section terminates with a bearing surface of the base plate 80.
  • the base plate 80 may equally serve as a foot or as a ceiling support element of the ceiling support.

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  • Engineering & Computer Science (AREA)
  • Architecture (AREA)
  • Mechanical Engineering (AREA)
  • Civil Engineering (AREA)
  • Structural Engineering (AREA)
  • Shaping Of Tube Ends By Bending Or Straightening (AREA)
  • Mutual Connection Of Rods And Tubes (AREA)
  • Rigid Pipes And Flexible Pipes (AREA)

Claims (15)

  1. Tube d'échafaudage (1) comprenant un premier tronçon (10) et un deuxième tronçon (20) adjacent au premier tronçon (10), le premier tronçon (10) présentant une première section transversale avec un premier contour extérieur (12) et un premier contour intérieur (11), et le deuxième tronçon (20) présentant une deuxième section transversale avec un deuxième contour extérieur (22) et un deuxième contour intérieur (21), et le deuxième tronçon (20) pouvant être enfiché dans un tube dont la section transversale correspond à la première section transversale, caractérisé en ce que le premier tronçon (10) et le deuxième tronçon (20) sont reliés l'un à l'autre d'un seul tenant, par l'intermédiaire d'un pli double (30), les couches de pli (2, 3, 4) du pli double (30) s'appuyant directement les unes sur les autres.
  2. Tube d'échafaudage (1) selon la revendication 1, caractérisé en ce que le tube d'échafaudage (1) présente, dans la zone du pli double (30), un contour extérieur, qui correspond sensiblement au premier contour extérieur (12).
  3. Tube d'échafaudage (1) selon l'une des revendications 1 ou 2, caractérisé en ce que le deuxième contour extérieur (22) correspond au premier contour intérieur (11), soustraction faite d'un léger jeu.
  4. Tube d'échafaudage (1) selon l'une des revendications 1 à 3, caractérisé en ce que le deuxième tronçon (20) constitue une extrémité du tube d'échafaudage (1) et est chanfreiné à l'extérieur au niveau de l'extrémité libre (7).
  5. Tube d'échafaudage (1) selon l'une des revendications 1 à 3, caractérisé en ce que le deuxième tronçon (20) présente une extrémité libre (7), en ce qu'une pièce (80) au moins partiellement sous forme de plaque et présentant une face avant (81), une face arrière (82) et une ouverture de passage (83), est emmanchée sur le deuxième tronçon (20), de sorte que le deuxième tronçon (20) traverse l'ouverture de passage (83) et que la face avant (81) de la pièce (80) vient s'appuyer contre une butée axiale (31) du tube d'échafaudage (1), qui est formée par le pli double (30), et en ce que par ailleurs, l'extrémité libre (7) du deuxième tronçon (20) est repliée radialement vers l'extérieur sur la face arrière (82) de la pièce (80) en y formant une collerette.
  6. Tube d'échafaudage (1) selon la revendication 5, caractérisé en ce que le tube d'échafaudage (1) est réalisé en tant qu'étançon de plafond, la pièce étant une semelle de base (80) de l'étançon de plafond.
  7. Procédé pour le façonnage d'extrémités de tube par déformation plastique à froid, notamment pour la fabrication d'un tube d'échafaudage (1) selon l'une des revendications 1 à 6, comprenant les étapes de procédé suivantes :
    - rétrécissement d'une extrémité d'un tube (1'), de sorte que le tube (1') comprend, après l'opération de rétrécissement, un premier tronçon (10) présentant une première section transversale, un deuxième tronçon (20) déformé par l'opération de rétrécissement et présentant une deuxième section transversale, ainsi qu'une transition (5) entre le premier tronçon (10) et le deuxième tronçon (20), la deuxième section transversale étant plus petite que la première section transversale,
    - réalisation d'un bourrelet périphérique (6) dirigé vers l'extérieur, dans la zone de la transition (5) ou dans une zone du premier tronçon (10) directement adjacente à la transition (5), par refoulement du tube (1') dans cette zone,
    - rabattement du bourrelet (6) par-dessus la transition (5), en direction de l'extrémité libre (7) du deuxième tronçon (20), de sorte qu'il se forme un pli double (30), le premier tronçon (10) étant relié au deuxième tronçon (20) par l'intermédiaire du pli double (30),
    caractérisé en ce que les couches de pli (2, 3, 4) du pli double (30) s'appuient directement les unes sur les autres.
  8. Procédé selon la revendication 7, caractérisé en ce que pour l'opération de rétrécissement on utilise une douille de formage (50), dont le contour intérieur (51) se rétrécit dans la direction axiale, la douille de formage (50) étant pressée dans la direction axiale, sur le tube (1'), pour produire le rétrécissement de l'extrémité de tube.
  9. Procédé selon l'une des revendications 7 ou 8, caractérisé en ce que le deuxième tronçon (20), pour la réalisation du bourrelet (6), est soutenu extérieurement par une douille d'appui (60) qui, pour la réalisation du bourrelet (6), est engagée par-dessus le deuxième tronçon (20) et par-dessus au moins une zone du premier tronçon (10), et en ce que dans le contour intérieur (61) de la douille d'appui (60), dans la zone du bourrelet (6) à réaliser, est formée une rainure (62) périphérique, dans laquelle le bourrelet (6) se déploie vers l'extérieur au cours de l'opération de refoulement.
  10. Procédé selon l'une des revendications 7 à 9, caractérisé en ce que l'opération de refoulement est effectuée à l'aide d'un mandrin (70), à l'aide duquel une force de pressage d'orientation axiale est exercée sur l'extrémité libre (7) du deuxième tronçon (20).
  11. Procédé selon l'une des revendications 9 à 10, caractérisé en ce que le rabattement du bourrelet (6) s'effectue par le retrait de la douille d'appui (60) en direction de l'extrémité libre (7) du deuxième tronçon (20), l'extrémité libre (7) étant soutenue axialement par le mandrin (70) à cette occasion.
  12. Procédé selon la revendication 11, caractérisé en ce que la douille d'appui (60) présente une première extrémité (63) et une deuxième extrémité (64), et en ce que la première extrémité (63) de la douille d'appui (60) se situe, pendant l'opération de refoulement, dans la zone du premier tronçon (10), et la rainure (62) est réalisée de manière à ce que le contour intérieur (61) de la douille d'appui (60) se rétrécisse en rampe, à partir d'une section transversale maximale de la rainure (62), en direction de la première extrémité (63).
  13. Procédé selon la revendication 12, caractérisé en ce que l'angle du rétrécissement en rampe (65), par rapport à l'axe longitudinal (66) de la douille d'appui (60), a une valeur maximale de 15 degrés.
  14. Procédé selon l'une des revendications 11 à 13, caractérisé en ce que la section transversale du contour intérieur (61), au niveau de la première extrémité (63) de la douille d'appui (60), correspond sensiblement à la section transversale extérieure du premier tronçon (10).
  15. Procédé selon l'une des revendications 9 à 14, caractérisé en ce que l'opération de rétrécissement et l'opération de refoulement se déroulent en une seule étape de procédé, la douille de formage (50) et la douille d'appui (60) étant combinées en un seul outil.
EP11003493.1A 2010-10-26 2011-04-28 Tuyau d'échafaudage et procédé destiné au traitement d'extrémités de tuyaux Active EP2446980B1 (fr)

Priority Applications (2)

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PL11003493T PL2446980T3 (pl) 2010-10-26 2011-04-28 Rura rusztowania i sposób obróbki zakończenia rury
DE201110101326 DE102011101326A1 (de) 2011-04-28 2011-05-12 Verbindung zwischen einem Rohrende und einem plattenförmigen Körper sowie Verfahren zur Herstellung der Verbindung

Applications Claiming Priority (1)

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DE102010049589A DE102010049589B8 (de) 2010-10-26 2010-10-26 Rohr und Verfahren zur Bearbeitung von Rohrenden

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EP2446980A2 EP2446980A2 (fr) 2012-05-02
EP2446980A3 EP2446980A3 (fr) 2012-08-01
EP2446980B1 true EP2446980B1 (fr) 2014-03-19

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EP (1) EP2446980B1 (fr)
DE (1) DE102010049589B8 (fr)
DK (1) DK2446980T3 (fr)
ES (1) ES2462016T3 (fr)
PL (1) PL2446980T3 (fr)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102017108206A1 (de) 2017-04-18 2018-10-18 Faurecia Autositze Gmbh Verstellanordnung für eine Verstelleinrichtung eines Fahrzeugsitzes sowie ein Verfahren zum Herstellen einer derartigen Verstellanordnung

Families Citing this family (3)

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Publication number Priority date Publication date Assignee Title
DE102013100765A1 (de) * 2013-01-25 2014-07-31 Peri Gmbh Gerüstrohr eines Baugerüsts und Gerüstelement
DE102013112462A1 (de) * 2013-11-13 2015-05-13 Faurecia Autositze Gmbh Höhenverstelleinrichtung eines Kraftfahrzeugsitzes
CN106836787B (zh) * 2017-01-20 2020-09-08 郑州大学西亚斯国际学院 一种园林建筑用脚手架

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JPS4745986B1 (fr) * 1967-02-25 1972-11-20
DE1972690U (de) * 1967-09-02 1967-11-16 Eberhard Layher Geruestrohr fuer metallgerueste.
DE1752411B2 (de) * 1968-05-22 1974-08-22 Philips Patentverwaltung Gmbh, 2000 Hamburg Vorrichtung zum Umstülpen eines Rohres
DE2654439A1 (de) * 1976-12-01 1978-06-08 Rossi Luigi Dr Verfahren zur herstellung einer loesbaren steckverbindung und steckverbindung hergestellt nach dem verfahren
DE9416640U1 (de) * 1994-10-15 1994-12-01 Reiche & Co Vorrichtung zur Aufnahme von Aufprallenergie und Aufhängung eines Stoßfängers an einem Fahrzeug
US6543266B1 (en) * 1999-08-24 2003-04-08 Magna International Inc. Hydroformed collapsible driveshaft and steering shaft and methods of making the same
JP4395964B2 (ja) * 2000-02-29 2010-01-13 Ｊｆｅスチール株式会社 衝突エネルギー吸収構造体
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Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102017108206A1 (de) 2017-04-18 2018-10-18 Faurecia Autositze Gmbh Verstellanordnung für eine Verstelleinrichtung eines Fahrzeugsitzes sowie ein Verfahren zum Herstellen einer derartigen Verstellanordnung
DE102017108206B4 (de) 2017-04-18 2020-06-18 Faurecia Autositze Gmbh Verstellanordnung für eine Verstelleinrichtung eines Fahrzeugsitzes, Verfahren zum Herstellen einer derartigen Verstellanordnung sowie Fahrzeugsitz

Also Published As

Publication number Publication date
ES2462016T3 (es) 2014-05-22
PL2446980T3 (pl) 2014-07-31
EP2446980A3 (fr) 2012-08-01
DK2446980T3 (da) 2014-05-05
DE102010049589B3 (de) 2012-04-26
EP2446980A2 (fr) 2012-05-02
DE102010049589B8 (de) 2012-09-13

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