EP0512426A1 - 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
EP0512426A1
EP0512426A1 EP92107427A EP92107427A EP0512426A1 EP 0512426 A1 EP0512426 A1 EP 0512426A1 EP 92107427 A EP92107427 A EP 92107427A EP 92107427 A EP92107427 A EP 92107427A EP 0512426 A1 EP0512426 A1 EP 0512426A1
Authority
EP
European Patent Office
Prior art keywords
polygonal tube
tube
expanding claw
polygonal
edges
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.)
Granted
Application number
EP92107427A
Other languages
German (de)
English (en)
Other versions
EP0512426B1 (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 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 depressions forming the thread base in the outer surface of the expanding claw .
  • 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 outer tool that form the thread base and the depressions forming the thread base at the end of the deformation 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 performing the method, which is characterized in that it has a tensioning 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 in that the expanding claw into the Polygonal tube can be inserted and expanded into a position adjacent to the inner wall of the polygonal tube 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 pivotably attached to an extension of a rod, the extension of the rod being supported during the expansion at the point on the inner surfaces of the polygonal tube opposite the deformation region.
  • 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 a spreading 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 expanding 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 when a threaded nut is screwed out of the thread 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 in a longitudinally displaceable manner 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 expansion parts 10, 11 have a cross section which is designed such that the outer surfaces of the expanded expansion parts 10, 11 lie against the square tube 5 from the inside in the region of the edges.
  • the embodiment shown 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 external tools 15, 16 acting as a die.
  • the carriage 1 is driven by a further, schematically indicated, device 17 which, in cooperation with a catch 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 mutually opposite edges.
  • the expanding claw 10, 11, 14, as a relatively rigid counter-tool absorbs the pressure of the two external tools 15, 16 which are 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 base of the thread segments the wall thickness is approximately preserved.
  • the device 17 shifts 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 processing section of the square tube 5 is provided with threaded segments.
  • the square tube 5 is rotated in the clamping device 4 by 90 °, so that 5 thread 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)
  • Clamps And Clips (AREA)
  • Shaping Of Tube Ends By Bending Or Straightening (AREA)
  • Joints With Pressure Members (AREA)
  • Spinning Or Twisting Of Yarns (AREA)
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
DE4114336 1991-05-02
DE4114336A DE4114336A1 (de) 1991-05-02 1991-05-02 Verfahren und vorrichtung zum anbringen von gewindezuegen auf mehrkantrohren

Publications (2)

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

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN110508700A (zh) * 2019-09-02 2019-11-29 珠海格力智能装备有限公司 夹持装置及具有其的胀管机

Families Citing this family (1)

* 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

Citations (4)

* 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

Family Cites Families (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3700758A1 (de) * 1987-01-13 1988-07-21 Gd Anker Gmbh & Co Kg Verfahren zur formung eines gewindes und rohrkoerper mit gewinde

Patent Citations (4)

* 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

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN110508700A (zh) * 2019-09-02 2019-11-29 珠海格力智能装备有限公司 夹持装置及具有其的胀管机

Also Published As

Publication number Publication date
DE4114336A1 (de) 1992-11-05
ES2067975T3 (es) 1995-04-01
EP0512426B1 (fr) 1994-12-07
ATE115015T1 (de) 1994-12-15
DE59200890D1 (de) 1995-01-19

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