EP0512426B1 - Procédé et dispositif pour la réalisation de filetages sur des tubes polygonales - Google Patents

Procédé et dispositif pour la réalisation de filetages sur des tubes polygonales Download PDF

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Publication number
EP0512426B1
EP0512426B1 EP92107427A EP92107427A EP0512426B1 EP 0512426 B1 EP0512426 B1 EP 0512426B1 EP 92107427 A EP92107427 A EP 92107427A EP 92107427 A EP92107427 A EP 92107427A EP 0512426 B1 EP0512426 B1 EP 0512426B1
Authority
EP
European Patent Office
Prior art keywords
claw
spreadable
pipe
multiple sided
sided pipe
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
EP92107427A
Other languages
German (de)
English (en)
Other versions
EP0512426A1 (fr
Inventor
Artur Dipl.-Ing. Schwörer (FH)
Werner Dipl.-Ing. Handvest
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.)
Peri GmbH
Original Assignee
Peri 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 Peri GmbH filed Critical Peri GmbH
Publication of EP0512426A1 publication Critical patent/EP0512426A1/fr
Application granted granted Critical
Publication of EP0512426B1 publication Critical patent/EP0512426B1/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

Definitions

  • the invention relates first of all to a method for applying thread pulls to the edges of a polygonal tube. Because of the angular cross-section of the tube, the thread can not be applied by rolling the thread, so that so far the thread cutting, for. B. were cut by a cutting clip. With a polygonal cross-section of the pipes and thus a flat edge angle and corresponding wall thickness of the pipes, this poses few problems. It If there are segments of a thread in the area of the edges, the middle area of the flat side walls is free of threads.
  • the polygonal tube has few edges - for example 5, 4 or 3 edges - the thread segments must be cut relatively deep at the edges in order to give a sufficiently deep engagement in the longitudinal direction of the threaded connections for a threaded nut engaging in the threaded connections.
  • the wall in the thread base becomes very thin, possibly the wall breaks completely through in the area of the edge, so that a hole is created in the thread base.
  • the object of the invention is to improve threaded segments arranged in the area of the edges of polygonal tubes.
  • this object is first achieved in that the tube is deformed without cutting.
  • an expanding claw the outer surface of which has the inner contour of a section of the thread segments to be produced, is clamped as a lower tool from the inside against the wall of the polygonal tube.
  • at least one outer tool which has the outer contour of a section of the thread segments to be produced, is pressed in the area of the expanding claw from the outside against the edge of the polygonal tube, so that the material of the tube wall in the area of the edges enters recesses in the outer surface of the expanding claw, forming the thread base .
  • the outer tool and the expanding claw are then lifted off the tube walls and the polygonal tube is displaced axially by one pitch or a multiple thereof relative to the outer tool and the expanding claw by a machining section.
  • This method has the advantage that the wall of the polygonal tube is weakened only slightly or not at all in the thread base. Due to the deformation with the external tool and the expanding claw, this wall section is additionally solidified, breaking through the wall in the area of the thread base is avoided with certainty.
  • the thickness of the wall thickness remaining in the area of the thread base after the deformation depends on the distance between the elevations of the external tool that form the thread base at the end of the deformation and the depressions forming the thread base in the expanding claw that serves as the counter tool. It is therefore possible with the method according to the invention not only to produce thread segments in which the wall thickness in the region of the thread base corresponds to the wall thickness of the polygonal tube in the region of the flat side walls, but also in thread segments in which this wall thickness is smaller, but may also be somewhat thicker, when the material of the polygonal tube reaches the flow limit during the deformation.
  • the invention further relates to a device for carrying out the method, which has a clamping device for the polygonal tube and an expanding claw, at least one of these parts being displaceably guided parallel to the axis of the polygonal tube, and that the expanding claw can be inserted into the polygonal tube and into one the inner wall of the polygonal tube can be spread apart and can also be folded into a position in which the outer contour of the expanding claw has smaller outer dimensions than the corresponding inner dimensions of the polygonal tube in the area of the threaded segments.
  • an expanding claw as a counter-tool for deforming the polygonal tube results in a simple construction of the device, since the expanding claw is designed such that it is supported against the inner surfaces of the polygonal tube during the deformation.
  • the outer contour of the expanding claw can have the internal dimensions of the polygonal tube in the expanded position, with recesses being provided on all edges of the expanding claw for receiving the thread pulls.
  • the expanding claw is designed such that its edges, which are not required as a counter-tool for the external tool, are round or flattened.
  • the outer contour of the expanding claw can be supported at several points on the inner surfaces of the polygonal tube. In one embodiment of the invention, however, the expanding claw is supported only at the point on the inner surfaces opposite the deformed edge. In this case, it is sufficient if the expanding claw has an expanding part which is pivotally attached to an extension of a rod, the extension of the rod being supported on the inner surface of the polygonal tube opposite the deformation region when it is expanded.
  • Embodiments of the expanding claw can, however, also have a plurality of pivotably mounted expanding parts, one or two of which form the counter-tool to the external tool, whereas the other expanding parts are used to support the expanding claw on the inner surfaces of the polygonal tube.
  • the spreading claw can be spread out by various devices, for example the spreading members can be spread by compressed air or a hydraulic medium.
  • the spreading members can be spread by compressed air or a hydraulic medium.
  • only two expansion parts are provided, which are separated by a mechanical device, namely, an expansion cone to be spread.
  • the expansion cone is fastened to an actuating rod which is passed through the hollow cross section of a rod carrying the expansion claw and is driven at its rear end to perform a displacement movement.
  • This device for spreading the expanding claw allows a very simple and robust construction.
  • the invention further relates to a threaded tube which is designed as a polygonal tube, for example as a square tube and has segments of a thread along its edges, the wall thickness in the thread base being essentially the same as in the region of the side walls.
  • a threaded pipe is particularly suitable for use in the construction industry for ceiling or other supports or formwork clamps. Contaminants that settle in the thread segments in the area of the edges are pressed out of the thread when a threaded nut is screwed into the space between the round inner surface of the threaded nut and the flat side surfaces of the polygonal tube, in particular a square tube. This self-cleaning of the thread is ensured in particular because there is no breakthrough to the interior of the polygonal tube that holds the contamination in the thread base of the threaded segments, but the wall thickness of the polygonal tube is generally almost preserved at this point.
  • a carriage 1 is guided so as to be longitudinally displaceable on a base frame 2.
  • the displacement movement is driven by a hydraulic or pneumatic feed device 3.
  • a clamping device 4 for a square tube 5 is rigidly attached.
  • the tensioning device 4 is indicated schematically by a device 6 having a cylinder and a piston.
  • a plate 7 is also attached to which a support tube 8 is attached.
  • a support tube 8 is attached.
  • two expansion parts 10, 11 are pivotally mounted about an axis 9.
  • a rod 13 driven by an actuating device 12 is slidably guided, which carries an expansion cone 14 at its front end.
  • the spreading parts 10, 11 have a cross section which is designed such that the outer surfaces of the spreading spreading parts 10, 11 lie against the square tube 5 from the inside in the region of the edges.
  • the illustrated embodiment has two external tools 15, 16, which on two opposite edges of the Square tube 5 can act and are formed on its end face so that segments of a thread are formed in the region of these opposite edges of the square tube 5.
  • the expanding parts 10, 11 located inside the square tube 5 in the area of the external tools 15, 16 serve as counter tools for the external tools 15, 16.
  • the outer surface of the expanding parts 10, 11 has a corresponding profile, which the male to the End faces of the outer tools 15, 16 acting as a die.
  • the carriage 1 is driven by a further, schematically indicated device 17 which, in cooperation with a notch bar 18, advances the carriage 1 step by step.
  • the square tube 5 clamped in the clamping device 4 is pushed by the feed device 3 in the axial direction of the square tube 5 over an expansion claw consisting of the expansion parts 10, 11 and the expansion cone 14, which between the external tools 15, 16 are held in their position unchangeable by the rod 8.
  • the expansion parts 10, 11 are then spread out by pulling back the expansion cone 14 with the aid of the actuating device 12, so that they lie against the inner surfaces of the square tube 5 in the region of two opposite edges.
  • the expanding claw 10, 11, 14, as a relatively rigid counter-tool absorbs the pressure of the two external tools 15, 16 moved relative to one another.
  • the material of the wall of the square tube 5 occurs in the deformation in depressions on the outer surfaces of the expansion parts 10, 11, so that in Thread root of the thread segments the wall thickness is approximately preserved.
  • the device 17 moves the slide 1 by one machining section until a sensor 23 switches off the drive by falling into the next catch of the catch bar 18. Then the next machining section of the square tube 5 is provided with thread segments.
  • the square tube 5 is rotated in the clamping device 4 by 90 °, so that 5 threaded segments can be formed on the other two edges of the square tube.
  • a compression coil spring 20 is supported on a flange 19 of the rod 8, the other end of which presses a disk 21 against inclined surfaces 22 of the expansion parts 10, 11 and returns it to its rest position when the expansion cone 14 is pushed away from the expansion parts 10, 11.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Shaping Metal By Deep-Drawing, Or The Like (AREA)
  • Spinning Or Twisting Of Yarns (AREA)
  • Clamps And Clips (AREA)
  • Joints With Pressure Members (AREA)
  • Shaping Of Tube Ends By Bending Or Straightening (AREA)

Claims (8)

  1. Procédé pour l'application de rainures de filet sur des arêtes d'un tube polygonal, dans lequel le tube polygonal (5) est déformé sans enlèvement de copeaux par le fait que d'abord un mandrin expansible (10, 11, 14) dont la surface externe présente le contour interne d'un tronçon de segments de filet à réaliser est serré à la manière d'un outil auxiliaire depuis l'intérieur contre la paroi du tube polygonal (5), dans lequel ensuite au moins un outil externe (15, 16) qui présente le contour externe d'un tronçon des segments de filet à réaliser est pressé depuis l'extérieur contre des arêtes du tube polygonal (5) dans la zone du mandrin expansible (10, 11, 14) de façon que la matière de la paroi du tube polygonal (5) pénètre, dans la zone des arêtes, dans les évidements de la surface externe du mandrin expansible (10, 11, 14) et dans lequel, après le façonnage, l'outil externe (15, 16) et le mandrin expansible (10, 11, 14) sont retirés des parois du tube et ensuite le tube polygonal (5) est déplacé axialement d'un pas ou d'un multiple de celui-ci par rapport à l'outil externe (15, 16) et au mandrin expansible (10, 11, 14), pour une section du façonnage.
  2. Procédé suivant la revendication 1, caractérisé en ce que le façonnage sans enlèvement de copeaux a lieu par estampage en creux.
  3. Procédé suivant la revendication 1 ou 2, caractérisé en ce que les différentes arêtes du tube polygonal (5) sont façonnées l'une après l'autre.
  4. Procédé suivant l'une des revendications 1 à 3, caractérisé en ce que la paroi du tube est façonnée dans la zone de l'outil externe (15, 16) et du mandrin expansible (10, 11, 14) de façon que l'épaisseur de paroi soit approximativement maintenue dans la zone des segments de filet.
  5. Dispositif pour la mise en oeuvre du procédé suivant l'une des revendications 1 à 4, dans lequel le dispositif présente un dispositif de serrage (4) pour le tube polygonal (5) et un mandrin expansible (10, 11, 14), au moins un de ces éléments (4 ou bien 10, 11, 14) étant guidé de façon à pouvoir être déplacé parallèlement à l'axe du tube polygonal (5), et dans lequel le mandrin expansible (10, 11, 14) peut être introduit dans le tube polygonal (5) et peut être expansé en une position appliquée contre la paroi interne du tube polygonal (5) et de plus replié dans une position dans laquelle le contour externe du mandrin expansible (10, 11, 14) présente dans la zone des segments de filet des dimensions externes inférieures aux dimensions internes correspondantes du tube polygonal (5).
  6. Dispositif suivant la revendication 5, caractérisé en ce que le contour externe du mandrin expansible (10, 11, 14) en expansion s'appuie en des endroits opposés l'un de l'autre de la surface interne du tube polygonal (5).
  7. Dispositif suivant la revendication 4 ou 5, caractérisé en ce que le mandrin expansible (10, 11, 14) présente au moins deux éléments expansibles (10, 11) qui sont articulés à l'extrémité d'une barre creuse (8) qui peut être introduite dans le tube polygonal (5), et entre lesquels il y a un cône (14) qui peut être déplacé dans la direction de l'axe de la barre creuse (8) et qui est fixé à une barre (13) guidée dans la barre creuse (8) pour le déplacement des éléments expansibles (10, 11).
  8. Tube fileté (5) fabriqué par le procédé et par le dispositif suivant l'une des revendications précédentes, dans lequel un tube polygonal présente le long de ses arêtes des segments de filet et l'épaisseur de paroi dans la zone de ses segments de filet est sensiblement égale à celle dans la zone de ses parois latérales.
EP92107427A 1991-05-02 1992-04-30 Procédé et dispositif pour la réalisation de filetages sur des tubes polygonales Expired - Lifetime EP0512426B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE4114336A DE4114336A1 (de) 1991-05-02 1991-05-02 Verfahren und vorrichtung zum anbringen von gewindezuegen auf mehrkantrohren
DE4114336 1991-05-02

Publications (2)

Publication Number Publication Date
EP0512426A1 EP0512426A1 (fr) 1992-11-11
EP0512426B1 true EP0512426B1 (fr) 1994-12-07

Family

ID=6430827

Family Applications (1)

Application Number Title Priority Date Filing Date
EP92107427A Expired - Lifetime EP0512426B1 (fr) 1991-05-02 1992-04-30 Procédé et dispositif pour la réalisation de filetages sur des tubes polygonales

Country Status (4)

Country Link
EP (1) EP0512426B1 (fr)
AT (1) ATE115015T1 (fr)
DE (2) DE4114336A1 (fr)
ES (1) ES2067975T3 (fr)

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE19960008C1 (de) * 1999-12-13 2001-08-23 Baunach Und Schmid Gmbh Mehrkantrohr mit Gewindezügen
CN110508700B (zh) * 2019-09-02 2020-11-27 珠海格力智能装备有限公司 夹持装置及具有其的胀管机

Family Cites Families (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR552911A (fr) * 1921-11-11 1923-05-09 Alsacienne Constr Meca Procédé pour la fabrication de tuyaux à parois ondulées
US3314276A (en) * 1964-04-07 1967-04-18 Federal Mogul Bower Bearings Bellows forming machine
FR2203685A1 (fr) * 1972-10-19 1974-05-17 Lechevallier Maurice
DE3514485A1 (de) * 1985-04-22 1986-10-23 Heinz 4000 Düsseldorf Regenhardt Verfahren und vorrichtung zur herstellung von schlitzbruecken-filterrohren
DE3700758A1 (de) * 1987-01-13 1988-07-21 Gd Anker Gmbh & Co Kg Verfahren zur formung eines gewindes und rohrkoerper mit gewinde

Also Published As

Publication number Publication date
ATE115015T1 (de) 1994-12-15
EP0512426A1 (fr) 1992-11-11
DE4114336A1 (de) 1992-11-05
DE59200890D1 (de) 1995-01-19
ES2067975T3 (es) 1995-04-01

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