EP1097761A1 - Vorrichtung zur Bearbeitung von Rohrenden - Google Patents

Vorrichtung zur Bearbeitung von Rohrenden Download PDF

Info

Publication number
EP1097761A1
EP1097761A1 EP00390018A EP00390018A EP1097761A1 EP 1097761 A1 EP1097761 A1 EP 1097761A1 EP 00390018 A EP00390018 A EP 00390018A EP 00390018 A EP00390018 A EP 00390018A EP 1097761 A1 EP1097761 A1 EP 1097761A1
Authority
EP
European Patent Office
Prior art keywords
axis
forming machine
tool holder
forming
pusher assembly
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.)
Withdrawn
Application number
EP00390018A
Other languages
English (en)
French (fr)
Inventor
Philippe Jaubert
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.)
Financiere Robolix A Responsabilite Ltee Ste
Original Assignee
Financiere Robolix A Responsabilite Ltee Ste
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 Financiere Robolix A Responsabilite Ltee Ste filed Critical Financiere Robolix A Responsabilite Ltee Ste
Publication of EP1097761A1 publication Critical patent/EP1097761A1/de
Withdrawn legal-status Critical Current

Links

Images

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

Definitions

  • the invention relates to a machine for forming ends of tubes, comprising mounted on a frame, means for holding and clamping a tube adapted to position it so that it extends along a longitudinal axis (x), said forming axis, at least one tool for forming one end of said tube mounted on a tool holder, and means for translational movement of each tool holder able to move it along the axis (x) between an advanced position in which they exert a forming force capable of making it possible to form the end of the tube, and a withdrawal position adapted to allow the unloading of the formed tube and the loading a new tube.
  • All forming machines designed to date include, for the translational movement of the tools, a hydraulic cylinder, currently often controlled in speed and position by an encoder by through a servo valve.
  • the whole machine is subjected to violent shocks which, on the one hand, make it necessary to design machines robust capable of withstanding these shocks, and on the other hand, lead in the long run to fatigue and wear of the components of these machines.
  • the present invention aims to overcome this absence of alternative and with the primary objective of providing a forming machine with cycle times are optimized compared to those of current forming machines.
  • Another object of the invention is to provide a machine for training not requiring a high-power hydraulic unit.
  • Another object of the invention is to provide a machine for form whose potential fatigue and wear and tear of the various constituent organs are reduced compared to those of the organs of current forming machines.
  • Another object of the invention is to provide a machine for form with a small footprint.
  • the sinusoidal return path of the tool results from a simple linear movement of the central axis of articulation of the rods between one and the other of the extreme positions of said axis on either side of the axis longitudinal (x). Consequently, each forming pass is obtained by means of the simple linear displacement, in a single displacement direction and on a short stroke, of the central articulation axis of the rods, between two positions extremes located on either side of the longitudinal axis (x), the neutral position in which said central axis being coaxial with said longitudinal axis (x) corresponding to the advanced forming position of the tool.
  • time cycles is optimized compared to that of current forming machines, leading to a noticeable increase in productivity.
  • time of an elementary cycle for a pass of forming is reduced to a duration of the order of 0.7 seconds.
  • this forming machine further comprises a force limiting member calibrated so as to be trigger and compress only beyond a forming effort threshold predetermined and to remain fixed below this threshold.
  • this limiting organ force advantageously consists of a prestressed gas spring.
  • the limiting member of effort is integrated into the pusher assembly and calibrated so as to trigger and compress only beyond a predetermined training effort threshold exerted on said pusher assembly.
  • this limiting member force can also be interposed between the rear link and the element of stop of the latter, and calibrated so as to fire and compress only beyond a predetermined force threshold exerted on said link.
  • the means actuating rods consist of at least one cylinder with a rod articulated on the central axis of articulation of the rods.
  • these actuating means comprise two cylinders arranged and fueled in opposition.
  • the energy required necessary for carrying out the forming can thus be obtained by means of one or two pneumatic cylinders, and the forming machine therefore does not require, in these conditions, to be associated with a hydraulic power plant, hence the elimination of all drawbacks inherent in the present of such a hydraulic power plant.
  • Another advantage of the forming machine according to the invention lies in the fact that the design of the means for translational movement of the tools guarantees that the same stroke of these tools is obtained, and therefore a quality of uniform forming, regardless of the direction of movement of the axis of central articulation of the rods.
  • the forming machine comprises means for adjusting the longitudinal position, according to the axis (x), of the rear articulation axis of the rods.
  • Such adjustment means allow, in fact, to adjust the advanced forming position of the tool, which turns out in practice variable depending on the type of forming to be performed and therefore the tool used.
  • the rear link is articulated at its rear hinge pin on a slide capable of moving axially along the axis (x), the means for adjusting the position of said rear articulation axis comprising a shim of variable thickness interposed between said slide and a frame element, and means for displacement of said shim capable of allowing the thickness of said shim to be adjusted interposed between the slide and the frame element.
  • the forming machine advantageously comprises means for digital control of the means of displacement of the hold capable of control the movements of said wedge when moving the tool from its advanced forming position to its retracted withdrawal position.
  • the means of displacement of the hold include a cam integral with said shim, associated with an eccentric system able to generate a sinusoidal longitudinal displacement of said cam along an axis orthogonal to the axis (x).
  • the forming machine according to the invention is of the type comprising a tool holder barrel rotatable around a rotation axis (xl) parallel to (x), pierced with a plurality of housings uniformly distributed around the axis (xl) capable of each housing a tool holder, and means for driving in rotation of said tool holder barrel capable of indexing the position of the latter so as to center the housings on the axis (x).
  • the forming machine according to the invention comprises means for numerically controlling adjustment means from the longitudinal position of the retractable stop.
  • each housing of the barrel tool holder support includes a countersink facing the pusher assembly, said tool pusher assembly comprising an end section of frustoconical shape combined with said milling.
  • the forming machine shown by way of example in the figures is adapted to form the end of tubes presented axially, along an axis of forming (x), facing forming tools and kept tight for the operation forming between two clamping jaws 1, 2 mounted on a frame 3 and shown in the figure 1.
  • Such clamping jaws 1, 2 actuated between a position open tube loading and unloading, and a closed position of clamping and holding said tubes can be of any conventional type known in itself, or preferably of the type described in the patent application filed today together with this application, in the name of the plaintiff.
  • the forming machine comprises in the first place, rotatably mounted relative to the frame 3 around a rotation axis (x1) parallel to the bending axis (x), a support cylinder for 4 tool holders.
  • This barrel 4 is rotatably mounted, by means of bearings such as 5, around the front section of a hollow shaft 6 centered on the axis (x1), and is secured in translation on said hollow shaft.
  • this barrel 4 is conventionally pierced with a plurality of longitudinal cylindrical housings such that 7, in the example six in number, uniformly distributed around the axis (x1) to the same distance from the latter adapted to allow each housing 7 coaxially with the forming axis (x) by rotation of said barrel.
  • Each of these housings 7 further comprises a countersink 8 at the outlet of this last at the rear side of the barrel 4.
  • the barrel 4 finally has a peripheral wall having a rear end section 9 machined in the form of a toothed wheel suitable for meshing with a pinion 10 disposed above the upper generator of said barrel, and mounted on the motor shaft of a brushless motor 11 adapted to allow to index the position of the various housings 7 relative to the forming axis (x).
  • the forming machine also includes a set of tool holders of cylindrical shape such as 12, 13, adapted to be inserted by sliding in the housings 7 of the barrel 4, and each equipped, in a conventional manner, an anterior face pierced with a blind bore into which is inserted and secured a tool such as 12a, 13a.
  • Each of these tool holders 12, 13 also has a posterior end section having an annular groove delimiting a rib rear 14 of keying adapted to extend outside the housing 7 corresponding, in the posterior extension of the latter.
  • the forming machine has a disc-shaped plate 15 secured around the hollow shaft 6 in view of the rear face of the barrel 4, said plate having a groove peripheral 16 capable of accommodating the keying rib 14 of said tool holders.
  • this indexing plate 15 has, in addition, a truncated circular shape defining a horizontal flat 17 without peripheral groove 16, positioned so as to allow, on the one hand, the introduction of each tool holder 12, 13 into the housing 7 extending coaxially with the forming axis, and on the other hand, the actuation of the tool holder 13 located in said housing by the pusher assembly, as described below.
  • the forming machine according to the invention also comprises as shown in Figures 1 and 2, a retractable stop 18 for positioning longitudinal of the end of the tubes before tightening of the latter by the jaws of tightening 1, 2.
  • This retractable stop 18 consists of a square in inverted L shape defining a vertical stop wall 18a, and the other wall of which 18b horizontal is secured under the rod of a jack 19 arranged vertically, of so as to move said stop between a stop position where its vertical wall 18a is centered on the forming axis, and a retracted position above said axis of forming.
  • This retractable stop 18 is, moreover, associated with means for adjusting its longitudinal position making it possible to adjust its position the along the forming axis (x).
  • the cylinder body 19 is secured to a vertical plate 20, itself secured to the face front of a sleeve 21 slidably mounted along an anterior portion of the hollow shaft 6 extending in the anterior extension of the barrel 4, said sleeve being locked in rotation relative to said hollow shaft by a key system 22.
  • the sleeve 21 further comprises a tapped blind bore in which is inserted the threaded front end 23a of a rod 23 extending to the interior of the hollow shaft 6, and whose rear end is rotated by means of a toothed belt 24 actuated by a motor 25.
  • the forming machine comprises also a pusher assembly of the tool holder 13 positioned along the forming axis, and means for translational movement of said pusher assembly.
  • the pusher assembly is constituted mainly of three components forming a set comprising two elements telescopic 26, 27, and a force limiting member 28 interposed between said elements and tared so as to fire and compress only beyond one predetermined force threshold exerted on said pusher assembly.
  • the first of the telescopic elements 26, said pusher posterior, consists of a hollow cylinder mounted sliding in translation inside a bearing 29 for guiding in translation centered on the forming axis (x) and secured under the generator of the hollow shaft 6.
  • this rear pusher 26 comprises, at short distance from its posterior end, an internal transverse wall 30 of separation.
  • the force limiting member 28 consists in turn of a spring with prestressed gas housed in the rear pusher 26 so as to come into abutment against the anterior face of the partition wall 30 of the latter.
  • a spring to prestressed gas 28 has the particularity of compressing only beyond of a given axial force threshold, and to remain fixed below this threshold.
  • the second of the telescopic elements 27, said pusher front, consists of a full cylindrical lifter partially housed in the rear pusher 26 in a translational guide bearing 31 disposed in this rear pusher 36, so that said front pusher abuts against the gas spring 28.
  • This anterior pusher 26 further comprises, at its front face, a horizontal through groove 32 of keying of suitable shape to accommodate the rear groove 14 of the tool holder 13 brought into the forming axis by barrel rotation 4.
  • These translational displacement means include, in in addition, two actuators 38, 39 for actuating the rods 33, 34, arranged and supplied in opposition, and whose rods are articulated on the central axis of articulation 35 said links.
  • the translational displacement means finally comprise means of adjustment over a stroke of the order of 2 mm, of the advanced position of the pusher assembly and therefore of the tool holder 13 actuated by the latter.
  • adjustment means comprise, firstly, a shim 40 of trapezoidal section housed in a vertical slide formed in the frame 3 to the rear of the slide 37, said shim having an anterior face inclined by relative to the vertical adapted to come into contact with the rear face of said slide by means of a ball / spring system shown schematically at 41.
  • These adjustment means further comprise means for displacement in translation of the wedge 40 able to move it vertically in its slide so as to adjust the longitudinal position along the forming axis of the slide 37.
  • These displacement means comprise a cam 42 constituted by the lower extension of the wedge 40, at the end lower of which are mounted two superimposed rollers 43, 44 of axes of rotation parallel to the forming axis.
  • These displacement means further comprise a disc 45 mounted eccentrically on the shaft of a rotary drive motor 46 of this disc, said disc having a peripheral rim 47 and being arranged to so that the rollers 43, 44 come into contact with the peripheral rim 47 on the one hand and on the other side of the latter, at the level of the upper generator of the disc.
  • the central articulation axis 35 of the rods 33, 34 is offset relative to the forming axis, in a first position corresponding to the deployed state of one of the jacks 38 and in the retracted state of the other jack 39.
  • This retracted position corresponds to a positioning of the anterior pusher 26 adapted to allow, as shown in FIG. 2, to bring a tool holder 13 coaxially with the forming axis, by rotation of the barrel 4, and automatically hooking said tool holder to said anterior pusher.
  • the tube to be formed is loaded between clamping jaws 1, 2 after adjusting its positioning longitudinal by actuation of the retractable stop 18.
  • the gas spring 28 is triggered when the force exerted becomes greater than the calibration of said spring, causing a sliding of the rear pusher 26 relative to the front pusher 27, and leading to a limitation of the forming effort exerted.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Earth Drilling (AREA)
EP00390018A 1999-11-04 2000-10-31 Vorrichtung zur Bearbeitung von Rohrenden Withdrawn EP1097761A1 (de)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FR9913829 1999-11-04
FR9913829A FR2800650B1 (fr) 1999-11-04 1999-11-04 Machine a former des extremites de tubes

Publications (1)

Publication Number Publication Date
EP1097761A1 true EP1097761A1 (de) 2001-05-09

Family

ID=9551721

Family Applications (1)

Application Number Title Priority Date Filing Date
EP00390018A Withdrawn EP1097761A1 (de) 1999-11-04 2000-10-31 Vorrichtung zur Bearbeitung von Rohrenden

Country Status (2)

Country Link
EP (1) EP1097761A1 (de)
FR (1) FR2800650B1 (de)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP2036627A1 (de) * 2007-09-17 2009-03-18 Silfax Group Elektrische Maschine zum Verformung von Profilsenden
CN102248052A (zh) * 2011-07-01 2011-11-23 张家港兴宇机械制造有限公司 管端成型装置
CN110479883A (zh) * 2019-08-14 2019-11-22 苏州瑞美科材料科技有限公司 一种管端成型机构

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3078906A (en) * 1960-05-27 1963-02-26 Western Electric Co Machine for flanging tubular members
US4175417A (en) * 1977-12-01 1979-11-27 Cassanelli Ernest M Workpiece forming machine
US4505144A (en) * 1983-02-18 1985-03-19 Honda Giken Kogyo Kabushiki Kaisha Apparatus for simultaneous both-end shaping of workpiece

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3078906A (en) * 1960-05-27 1963-02-26 Western Electric Co Machine for flanging tubular members
US4175417A (en) * 1977-12-01 1979-11-27 Cassanelli Ernest M Workpiece forming machine
US4505144A (en) * 1983-02-18 1985-03-19 Honda Giken Kogyo Kabushiki Kaisha Apparatus for simultaneous both-end shaping of workpiece

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP2036627A1 (de) * 2007-09-17 2009-03-18 Silfax Group Elektrische Maschine zum Verformung von Profilsenden
FR2921003A1 (fr) * 2007-09-17 2009-03-20 Silfax Group Machine electrique pour la deformation des extremites d'un profil.
CN102248052A (zh) * 2011-07-01 2011-11-23 张家港兴宇机械制造有限公司 管端成型装置
CN110479883A (zh) * 2019-08-14 2019-11-22 苏州瑞美科材料科技有限公司 一种管端成型机构

Also Published As

Publication number Publication date
FR2800650A1 (fr) 2001-05-11
FR2800650B1 (fr) 2002-01-25

Similar Documents

Publication Publication Date Title
EP0892686B1 (de) Maschine zum biegen oder wölben von profilen und biegekopf für solche maschine
EP1093545A1 (de) Betätigungsglied eines werkzeugs mit eilgang und arbeitsgang
FR2503688A1 (fr) Cylindre presseur hydraulique pour ripage par pression de tubes et analogues
EP1295044A1 (de) Hydraulische, doppeltwirkende arbeitszylinder mit einer vorrichtung zur axialen verriegelung
FR2479039A1 (fr) Groupe de blocage et de rotation de fils, tubes et barres et son utilisation dans les machines a cintrer ou cintreuses
EP1097761A1 (de) Vorrichtung zur Bearbeitung von Rohrenden
EP1671730A1 (de) Vorrichtung zum Räumen
CA1110430A (fr) Procede d'elimination des contraintes residuelles produites dans un tube par une operation de sertissage et outillage pour la mise en oeuvre de ce procede
EP0564345B1 (de) Hochleistungs-Bördelmaschine zum Verschliessen von Konservendosen
EP0281488B1 (de) Drehender Biegekopf für Rohrbiegemaschine
EP3313593B1 (de) Vorrichtung zum biegen von profilelementen mit werkzeugen zum biegen von profilelementen und werkzeug zum schneiden dieser profilelemente
EP0112752A1 (de) Einrichtung zum Klemmen und Rundformen für das Anschliessen von Rohren grossen Durchmessers
FR2631872A1 (fr) Tete revolver pour machine-outil
EP0725709B1 (de) Schraubenschlüssel
BE1012430A5 (fr) Dispositif d'etirage et d'alimentation de fil integre.
FR2475958A1 (fr) Dispositif pour couper des tubes
FR2945760A1 (fr) Dispositif de fixation rapide par serrage d'un organe
WO2015028724A1 (fr) Dispositif de cintrage et de découpe de profilés tels que des tubes
EP0534879B1 (de) Hydraulischer doppeltwirkenden Arbeitszylinder mit Selbsthemmung
WO2005056241A1 (fr) Dispositif de serrage precis a actionnement rapide, et procede de commande
FR2682721A1 (fr) Verin pivotant autobloquant perfectionne.
EP1274538A1 (de) Stiftfoermiges werkzeug zum zentrieren und spannen
CH249913A (fr) Mandrin pour broche de tour automatique.
FR2800651A1 (fr) Machine a former des extremites de tubes, et dispositif de formage comportant deux desdites machines a former
FR2521888A1 (fr) Systeme de blocage d'outils sur un plateau rotatif indexable

Legal Events

Date Code Title Description
PUAI Public reference made under article 153(3) epc to a published international application that has entered the european phase

Free format text: ORIGINAL CODE: 0009012

AK Designated contracting states

Kind code of ref document: A1

Designated state(s): DE FR GB IT

AX Request for extension of the european patent

Free format text: AL;LT;LV;MK;RO;SI

17P Request for examination filed

Effective date: 20011105

AKX Designation fees paid

Free format text: DE FR GB IT

17Q First examination report despatched

Effective date: 20030521

STAA Information on the status of an ep patent application or granted ep patent

Free format text: STATUS: THE APPLICATION IS DEEMED TO BE WITHDRAWN

18D Application deemed to be withdrawn

Effective date: 20031202