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WO2008132767A1 - Procédé et système de soudage longitudinal de tiges tubulaires effilées - Google Patents

Procédé et système de soudage longitudinal de tiges tubulaires effilées Download PDF

Info

Publication number
WO2008132767A1
WO2008132767A1 PCT/IT2007/000313 IT2007000313W WO2008132767A1 WO 2008132767 A1 WO2008132767 A1 WO 2008132767A1 IT 2007000313 W IT2007000313 W IT 2007000313W WO 2008132767 A1 WO2008132767 A1 WO 2008132767A1
Authority
WO
WIPO (PCT)
Prior art keywords
shaft
passage
longitudinal
electrodes
feed direction
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.)
Ceased
Application number
PCT/IT2007/000313
Other languages
English (en)
Inventor
Nicola Di Tullio
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.)
Officine Meccaniche Murgesi Srl
Original Assignee
Officine Meccaniche Murgesi Srl
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 Officine Meccaniche Murgesi Srl filed Critical Officine Meccaniche Murgesi Srl
Priority to PCT/IT2007/000313 priority Critical patent/WO2008132767A1/fr
Publication of WO2008132767A1 publication Critical patent/WO2008132767A1/fr
Anticipated expiration legal-status Critical
Ceased legal-status Critical Current

Links

Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21C—MANUFACTURE OF METAL SHEETS, WIRE, RODS, TUBES, PROFILES OR LIKE SEMI-MANUFACTURED PRODUCTS OTHERWISE THAN BY ROLLING; AUXILIARY OPERATIONS USED IN CONNECTION WITH METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL
    • B21C37/00—Manufacture of metal sheets, rods, wire, tubes, profiles or like semi-manufactured products, not otherwise provided for; Manufacture of tubes of special shape
    • B21C37/06—Manufacture of metal sheets, rods, wire, tubes, profiles or like semi-manufactured products, not otherwise provided for; Manufacture of tubes of special shape of tubes or metal hoses; Combined procedures for making tubes, e.g. for making multi-wall tubes
    • B21C37/15—Making tubes of special shape; Making tube fittings
    • B21C37/16—Making tubes with varying diameter in longitudinal direction
    • B21C37/18—Making tubes with varying diameter in longitudinal direction conical tubes
    • B21C37/185—Making tubes with varying diameter in longitudinal direction conical tubes starting from sheet material
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21C—MANUFACTURE OF METAL SHEETS, WIRE, RODS, TUBES, PROFILES OR LIKE SEMI-MANUFACTURED PRODUCTS OTHERWISE THAN BY ROLLING; AUXILIARY OPERATIONS USED IN CONNECTION WITH METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL
    • B21C37/00—Manufacture of metal sheets, rods, wire, tubes, profiles or like semi-manufactured products, not otherwise provided for; Manufacture of tubes of special shape
    • B21C37/06—Manufacture of metal sheets, rods, wire, tubes, profiles or like semi-manufactured products, not otherwise provided for; Manufacture of tubes of special shape of tubes or metal hoses; Combined procedures for making tubes, e.g. for making multi-wall tubes
    • B21C37/08—Making tubes with welded or soldered seams
    • B21C37/0803—Making tubes with welded or soldered seams the tubes having a special shape, e.g. polygonal tubes
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21C—MANUFACTURE OF METAL SHEETS, WIRE, RODS, TUBES, PROFILES OR LIKE SEMI-MANUFACTURED PRODUCTS OTHERWISE THAN BY ROLLING; AUXILIARY OPERATIONS USED IN CONNECTION WITH METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL
    • B21C37/00—Manufacture of metal sheets, rods, wire, tubes, profiles or like semi-manufactured products, not otherwise provided for; Manufacture of tubes of special shape
    • B21C37/06—Manufacture of metal sheets, rods, wire, tubes, profiles or like semi-manufactured products, not otherwise provided for; Manufacture of tubes of special shape of tubes or metal hoses; Combined procedures for making tubes, e.g. for making multi-wall tubes
    • B21C37/08—Making tubes with welded or soldered seams
    • B21C37/0815—Making tubes with welded or soldered seams without continuous longitudinal movement of the sheet during the bending operation
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
    • B21C—MANUFACTURE OF METAL SHEETS, WIRE, RODS, TUBES, PROFILES OR LIKE SEMI-MANUFACTURED PRODUCTS OTHERWISE THAN BY ROLLING; AUXILIARY OPERATIONS USED IN CONNECTION WITH METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL
    • B21C37/00—Manufacture of metal sheets, rods, wire, tubes, profiles or like semi-manufactured products, not otherwise provided for; Manufacture of tubes of special shape
    • B21C37/06—Manufacture of metal sheets, rods, wire, tubes, profiles or like semi-manufactured products, not otherwise provided for; Manufacture of tubes of special shape of tubes or metal hoses; Combined procedures for making tubes, e.g. for making multi-wall tubes
    • B21C37/08—Making tubes with welded or soldered seams
    • B21C37/0822—Guiding or aligning the edges of the bent sheet
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
    • B23K—SOLDERING OR UNSOLDERING; WELDING; CLADDING OR PLATING BY SOLDERING OR WELDING; CUTTING BY APPLYING HEAT LOCALLY, e.g. FLAME CUTTING; WORKING BY LASER BEAM
    • B23K11/00—Resistance welding; Severing by resistance heating
    • B23K11/06—Resistance welding; Severing by resistance heating using roller electrodes
    • B23K11/061—Resistance welding; Severing by resistance heating using roller electrodes for welding rectilinear seams
    • B23K11/062—Resistance welding; Severing by resistance heating using roller electrodes for welding rectilinear seams for welding longitudinal seams of tubes
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
    • B23K—SOLDERING OR UNSOLDERING; WELDING; CLADDING OR PLATING BY SOLDERING OR WELDING; CUTTING BY APPLYING HEAT LOCALLY, e.g. FLAME CUTTING; WORKING BY LASER BEAM
    • B23K37/00—Auxiliary devices or processes, not specially adapted for a procedure covered by only one of the other main groups of this subclass
    • B23K37/04—Auxiliary devices or processes, not specially adapted for a procedure covered by only one of the other main groups of this subclass for holding or positioning work
    • B23K37/053—Auxiliary devices or processes, not specially adapted for a procedure covered by only one of the other main groups of this subclass for holding or positioning work aligning cylindrical work; Clamping devices therefor
    • B23K37/0535—Longitudinal pipe seam alignment clamps
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
    • B23K—SOLDERING OR UNSOLDERING; WELDING; CLADDING OR PLATING BY SOLDERING OR WELDING; CUTTING BY APPLYING HEAT LOCALLY, e.g. FLAME CUTTING; WORKING BY LASER BEAM
    • B23K2101/00—Articles made by soldering, welding or cutting
    • B23K2101/04—Tubular or hollow articles
    • B23K2101/06—Tubes

Definitions

  • the present invention relates to a method and system for longitudinally welding tapered tubular shafts.
  • Tapered tubular shafts are known, e.g. from US- 6,629,632, to be produced by gradually folding a trapezoidal metal sheet to position two opposite lateral edges of the sheet facing each other, and to form a tapered tubular shaft with an open longitudinal join line; feeding the longitudinally open shaft, in a feed direction parallel to its longitudinal axis, through a final calibration device, in which a number of pressure rollers, substantially equally spaced about the shaft, apply radially inward pressure on the shaft to press the two lateral edges defining the join line against each other; and welding the shaft along the join line while the two lateral edges are pressed against each other by the final calibration device. Welding is performed by red-hot heating the two lateral edges immediately upstream from the final calibration device by means of electrodes positioned substantially contacting the outer surface of the shaft.
  • the above known welding method has several drawbacks, mainly due to the fact that, the longitudinally open shaft being fed axially, its join line slopes with respect to the feed direction, so that, when welding the shaft, the electrodes must be moved crosswise to the shaft axis to maintain a given constant distance between the electrodes and the outer surface of the shaft .
  • the present invention also relates to a system for longitudinally welding tapered tubular shafts.
  • Figure 1 shows a side view of a preferred embodiment of the welding system according to the present invention
  • Figure 2 shows a larger-scale view, with parts removed for clarity, of a detail in Figure 1;
  • Figure 3 shows a schematic view in perspective of a further detail of the Figure 1 system.
  • System 1 comprises a feed line 5 for feeding shaft 2 longitudinally in a feed direction 6 - which, in the example shown, is horizontal - so that a leading portion of shaft 2 engages an electrowelding unit 7 and then a calibration device 8; and a traction device 9 for gripping a leading end of shaft 2 immediately downstream from calibration device 8, and pulling shaft 2 in feed direction 6 through calibration device 8.
  • feed line 5 comprises a rail 10 parallel to feed direction 6 and supporting a rear carriage 11 having an adjustable supporting unit 12 for supporting a trailing portion of shaft 2; an intermediate carriage 13 having an adjustable supporting unit 14; and a fixed adjustable supporting unit 15 at the end of rail 10 facing electrowelding unit 7.
  • Rear carriage 11 has a powered wheel 16 cooperating frictionally with rail 10; and intermediate carriage 13 is mounted idly on rail 10.
  • calibration device 8 comprises a fixed frame 17 in the form of a rectangular parallelepiped, wherein a base 18 and an upper cross member 19 are connected by four parallel columns 20 (only two shown) , which act as slideways for a carriage 21 mounts ⁇ to s ⁇ ide ⁇ W3 columns 20, in a vertical direction 22 perpendicular to direction 6, under control of an actuator assembly 23 fitted to upper cross member 19 and connected to carriage 21 by a screw-nut screw coupling.
  • Carriage 21 supports a pressure device 24 movable with carriage 21 and comprising a number of pressure rollers 25 (only two shown) arranged radially about an axis parallel to feed direction 6 to define a passage S in a plane P perpendicular to feed direction 6.
  • Each pressure roller 25 is connected in rotary manner to the end of a respective control rod 26, the axis of which lies in plane P together with the axes of the other rods 26, and the axial position of which, with respect to carriage 21, is adjustable, by actuating means not shown, to adjust the size and shape of passage S.
  • rods 26 are designed to impart a polygonal or circular shape to passage S, and are moved axially on carriage 21, by further actuating means not shown, to gradually adjust the size of passage S.
  • electrowelding unit 7 comprises a gantry frame 27 comprising four uprights 28 (only two shown) ; four upper cross members 29 (only three shown) arranged in two parallel pairs and connecting the top ends of uprights 28; and four intermediate cross members 30 (only three shown) arranged in two parallel pairs and connecting corresponding intermediate points of uprights 28. More specifically, each upper cross member 29 is parallel to a corresponding intermediate cross member 30; and two upper cross members 29, indicated 29a, and two intermediate cross members 30, indicated 30a, extend crosswise to feed direction 6.
  • An adjustable supporting unit 31 is connected to an intermediate point of each intermediate cross member 30a, and comprises a lever 32 sloping upwards and outwards of frame 27, hinged at its bottom end to relative intermediate cross member 30a to rotate, with respect to intermediate cross member 30a, about an axis crosswise to feed direction 6, and fitted on its top end with a roller 33 for supporting shaft 2.
  • the level of roller 33 is adjusted by adjusting the slope of lever 32 by means of a hydraulic jack 34 fixed to relative intermediate cross member 30a and having an output rod connected elastically to an intermediate point of lever 32.
  • the two adjustable supporting units 31 are associated with respective counterpressure units 35, 36 supported by upper cross members 29a; the upstream counterpressure unit 35 is adjustable hydraulically; and the downstream counterpressure unit 36 comprises a vertically adjustable carriage 37 having two rollers 38 arranged in series in feed direction 6.
  • the upper cross member 29a supporting carriage 37 is fitted, by means of a hinge 39 with a vertical axis 40, with a fork 41 supporting a spacer wheel 42, which rotates about a pin fitted to fork 41 and substantially crosswise to feed direction 6.
  • Electrowelding unit 7 also comprises a number of guide units 43 fitted to uprights 28 and having rollers 44 cooperating laterally with shaft 2.
  • electrowelding unit 7 also comprises a transformer 45 located over frame 27 and movable with respect to frame 27 in a downward-sloping direction 46 towards calibration device 8 by known actuating means not shown.
  • An arm 47 is connected to transformer 45, is substantially coplanar with spacer wheel 42, extends downwards in a direction parallel to direction 46, and is fitted on its bottom end with electrodes 48.
  • traction device 9 comprises a guide 49, parallel to feed direction 6, for a traction head 50, which is drawn together with shaft 2 along guide 49 by a known traction device not shown, and comprises, as shown in Figure 2, a hydraulic gripper 51 for gripping the end of shaft 2 immediately downstream from plane P in feed direction 6.
  • shaft 2 by now formed but still open along longitudinal join line 4, is placed on adjustable supporting units 12, 14, 15, which are adjusted to position longitudinal join line 4 parallel to feed direction 6.
  • feed direction 6 being horizontal
  • shaft 2 is positioned on adjustable supporting units 12, 14, 15 so that longitudinal join line 4 is horizontal and facing upwards, and axis 3 slopes downwards.
  • the work shaft 2 is shown positioned with its narrow end or section forwards; it should be stressed, however, that shaft 2 may equally well be fed wide-end-first with no complications .
  • drive wheel 16 of rear carriage 11 of feed line 5 is operated to feed shaft 2 through electrowelding unit 7 and calibration device 8.
  • adjustable supporting units 31 are kept lowered / counterpressure units 35, 36 are kept raised; transformer 45 is raised in direction 46 to lift electrodes 48 outwards of frame 17 into a raised rest position; pressure rollers 25 are parted to maximize the section of passage S; carriage 21 is moved to align passage S with shaft 2; and spacer wheel 42 is inserted between the edges (4a, 4b) of open longitudinal join line 4 of shaft 2.
  • adjustable supporting units 31 are elastically deformable to allow gradual movement of rollers 33 as shaft 2 advances.
  • a jaw of hydraulic gripper 51 is inserted inside the leading end of shaft 2, and hydraulic gripper 51 is closed to grip shaft 2; at the same time, transformer 45 and arm 47 are lowered in direction 46 to move electrodes 48 into a lowered work position, in which, electrodes 48 are located inside frame 17, substantially contacting the outer surface of shaft 2 at longitudinal join line 4, and at a fairly small distance, of about 10 cm, from plane P.
  • head 50 is moved in feed direction 6, and, at the same time, electrodes 48 are activated to heat edges
  • electrodes 48 can be locked in position and maintained stationary throughout the welding process, with obvious advantages in terms of both weld quality and the working life of electrodes 48.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Physics & Mathematics (AREA)
  • Optics & Photonics (AREA)
  • Lining Or Joining Of Plastics Or The Like (AREA)

Abstract

La présente invention concerne un procédé et un système de soudage longitudinal d'une tige tubulaire effilée (2) qui présente une ligne de jonction longitudinale ouverte (4) définie par deux bords longitudinaux face à face (4a, 4b). La tige (2) est avancée de façon progressive, dans une direction d'avance (6) parallèle à la ligne de jonction longitudinale (4), à la fois à travers un dispositif d'étalonnage (8) dans lequel des éléments de pression radiaux (25) définissent un passage (S) pour la tige (2) et compriment les bords longitudinaux (4a, 4b) l'un contre l'autre, et au-delà d'électrodes (48) qui se trouvent en amont du passage (S), sont sensiblement en contact avec la tige (2) au niveau de la ligne de jonction longitudinale (4) et sont activées afin de chauffer au rouge les bords longitudinaux (4a, 4b) de manière à permettre le soudage des ces bords longitudinaux (4a, 4b) l'un à l'autre au niveau du passage (S).
PCT/IT2007/000313 2007-04-30 2007-04-30 Procédé et système de soudage longitudinal de tiges tubulaires effilées Ceased WO2008132767A1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
PCT/IT2007/000313 WO2008132767A1 (fr) 2007-04-30 2007-04-30 Procédé et système de soudage longitudinal de tiges tubulaires effilées

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
PCT/IT2007/000313 WO2008132767A1 (fr) 2007-04-30 2007-04-30 Procédé et système de soudage longitudinal de tiges tubulaires effilées

Publications (1)

Publication Number Publication Date
WO2008132767A1 true WO2008132767A1 (fr) 2008-11-06

Family

ID=38795432

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/IT2007/000313 Ceased WO2008132767A1 (fr) 2007-04-30 2007-04-30 Procédé et système de soudage longitudinal de tiges tubulaires effilées

Country Status (1)

Country Link
WO (1) WO2008132767A1 (fr)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
IT201600092105A1 (it) * 2016-09-13 2018-03-13 Adige Spa Dispositivo di supporto per il supporto di un tubo su una macchina per la lavorazione di tubi, particolarmente una macchina per il taglio laser di tubi, e macchina per la lavorazione di tubi comprendente tale dispositivo di supporto.

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2042394A (en) * 1979-02-05 1980-09-24 Benteler Werke Ag A welding machine for welding tapered structures
US5862694A (en) * 1997-08-19 1999-01-26 Union Metal Corporation Tapered tube manufacturing apparatus and process
EP1166910A1 (fr) * 2000-06-22 2002-01-02 IUSRD (Ireland) Limited Dispositif et méthode pour la fabrications d'arbres creux

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2042394A (en) * 1979-02-05 1980-09-24 Benteler Werke Ag A welding machine for welding tapered structures
US5862694A (en) * 1997-08-19 1999-01-26 Union Metal Corporation Tapered tube manufacturing apparatus and process
EP1166910A1 (fr) * 2000-06-22 2002-01-02 IUSRD (Ireland) Limited Dispositif et méthode pour la fabrications d'arbres creux

Cited By (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
IT201600092105A1 (it) * 2016-09-13 2018-03-13 Adige Spa Dispositivo di supporto per il supporto di un tubo su una macchina per la lavorazione di tubi, particolarmente una macchina per il taglio laser di tubi, e macchina per la lavorazione di tubi comprendente tale dispositivo di supporto.
EP3292944A1 (fr) * 2016-09-13 2018-03-14 Adige S.p.A. Dispositif de support destiné à supporter un tube sur une machine de travail de tubes, en particulier d'une machine de découpe de tube laser, et tubes de machine de travail comprenant un tel dispositif de support
CN107813046A (zh) * 2016-09-13 2018-03-20 艾迪奇股份公司 用于支撑管加工机上的管的支撑装置及相关的管加工机
CN107813046B (zh) * 2016-09-13 2021-02-19 艾迪奇股份公司 用于支撑管加工机上的管的支撑装置及相关的管加工机
TWI722235B (zh) * 2016-09-13 2021-03-21 義大利商阿迪傑股份有限公司 用於在特別是雷射管件切割機的管件工作機上支持管件之支持裝置，以及具有上述支持裝置之管件工作機
US11224945B2 (en) 2016-09-13 2022-01-18 Adige S.P.A Support device for supporting a tube on a tube working machine and tube working machine comprising such a support device
AU2017219176B2 (en) * 2016-09-13 2022-06-16 Adige S.P.A. Support device for supporting a tube on a tube working machine, particularly a laser tube cutting machine, and tube working machine comprising such a support device

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