EP1618973A1 - Tête de roulage de tubes et machine à former des tubes comprenant la dite tête - Google Patents

Tête de roulage de tubes et machine à former des tubes comprenant la dite tête Download PDF

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Publication number
EP1618973A1
EP1618973A1 EP04425534A EP04425534A EP1618973A1 EP 1618973 A1 EP1618973 A1 EP 1618973A1 EP 04425534 A EP04425534 A EP 04425534A EP 04425534 A EP04425534 A EP 04425534A EP 1618973 A1 EP1618973 A1 EP 1618973A1
Authority
EP
European Patent Office
Prior art keywords
head
roll
lead screw
holders
rolling axis
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
EP04425534A
Other languages
German (de)
English (en)
Other versions
EP1618973B1 (fr
Inventor
Aurelio Crippa
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.)
CRIPPA SpA
Original Assignee
CRIPPA SpA
Fabbrica Macchine Curvatubi Crippa Agostino SpA
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 CRIPPA SpA, Fabbrica Macchine Curvatubi Crippa Agostino SpA filed Critical CRIPPA SpA
Priority to EP04425534A priority Critical patent/EP1618973B1/fr
Priority to DE602004006511T priority patent/DE602004006511T2/de
Publication of EP1618973A1 publication Critical patent/EP1618973A1/fr
Application granted granted Critical
Publication of EP1618973B1 publication Critical patent/EP1618973B1/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
    • B21D17/00—Forming single grooves in sheet metal or tubular or hollow articles
    • B21D17/04—Forming single grooves in sheet metal or tubular or hollow articles by rolling
    • 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 present invention relates to a pipe-rolling head and to a machine for shaping pipes comprising said head.
  • Rolling is a particular working obtained by cold deformation carried out by means of a head provided with three rolls idly mounted on a rotating support and disposed around a predetermined axis which is coincident with the longitudinal axis of a pipe to be rolled.
  • Each roll has a ridge on its circumferential surface the shape of which matches that of the impression to be formed in the pipe.
  • the end of the pipe clamped by an appropriate vice is enclosed by the three rolls and only subsequently the rolls are driven in rotation around the longitudinal axis of the pipe through rotation of the rotating support.
  • the roll pressure combined with the rotational motion of the head gives rise to the desired impression in the pipe end.
  • the pneumatic system comprises a thrust element (A) disposed around a rotation shaft (B) of the rolling head and movable in translation along the longitudinal axis (C).
  • the thrust element is moved forward by admitting air under pressure through a duct (D) delimited by the thrust element itself.
  • the thrust element on the opposite side from the pressurised duct, has a sloping surface (E) on which three wheels (F) rest, each wheel being connected to a respective shaping roll (G).
  • each roll is further provided with a stop of the mechanical type (L) abutting against a spacer (M) mounted in the vicinity of the longitudinal axis.
  • the rolls are mounted in a removable manner on carriages (N) rigidly connected to the arms carrying the wheels, so that the position of each roll in relation to the carriage carrying it can be varied.
  • the depth of the impression left by the rolls on the pipe depends on the geometry of the circumferential surface of the rolls and the position of the rolls relative to the carriages and to the spacer size.
  • the heads of the known art do not enable rolling operations to be automatically carried out at different depths on a single pipe.
  • the technical task underlying the present invention is to devise a pipe-rolling head and a machine for pipe shaping comprising said head that are capable of obviating the mentioned drawbacks.
  • a pipe-rolling head in accordance with the present invention is denoted by reference numeral 1.
  • Head 1 is mounted on a machine for shaping the pipe ends.
  • the machine of known type and therefore not shown or described in detail, comprises suitable means, such as a vice, capable of clamping a pipe 2 to be worked.
  • a vice capable of clamping a pipe 2 to be worked.
  • One end of pipe 2 clamped in the vice faces a tool assembly mounted on a base frame of the machine.
  • the tools, among which the rolling head 1, are moved so as to sequentially face the vice, in order to carry out different types of machining operations on the end of pipe 2 through cold deformation and/or material removal.
  • Head 1 once it is positioned in front of the vice, is actuated by actuating means "M" of known type and only diagrammatically shown in Fig. 1, along a rolling axis "X". Head 1 carries out a translation between a position at which it is moved close to the vice and a position at which it is spaced apart therefrom, so as to be positioned at an axial portion of the end of pipe 2 designed to be machined.
  • Head 1 comprises a rotating body 3 being set in rotation around the rolling axis "X" which is coincident with the longitudinal axis of pipe 2, by dedicated means 4 comprising a main motor 4a.
  • the rotating body 3 externally has a cylindrical shape the base 3a of which, when head 1 is brought in front of the pipe 2 (Fig. 2) retained by the vice, faces the vice itself.
  • Rolls 6 freely rotate around respective rotation axes "Y” substantially parallel to the rolling axis "X”.
  • each roll 6 is rotatably coupled, through a ball bearing for example, with a respective stem 7 integral with a roll-holder 5.
  • Each roll 6 has one or more raised portions 6a on its circumferential side surface, said raised portions being designed to leave their impression on the pipe 2 to be submitted to rolling.
  • Rolls 6 can be replaced by other rolls having different features depending on the type of impression it is necessary to leave on pipe 2.
  • the three roll-holders 5 carry out a translation relative to the rotating body 3 between an open position at which rolls 6 lie spaced apart from each other and from the rolling axis "X" and a closed position at which rolls 6 lie close to each other in the vicinity of the rolling axis "X" to encompass the pipe 2 to be rolled.
  • a pin 8 is installed in a removable manner on the rotating body 3 and extends along the rolling axis "X", which is coincident with the longitudinal axis of the rotating body 3, between rolls 6.
  • the radial sizes of pin 8 are adapted to enable housing of same into the pipe 2 to be machined, so as the perform the function of counteracting the pressure exerted by rollers 6. Pin 8 too can be replaced and it is selected based on the inner sizes of pipe 2.
  • Actuating means 9 moves the roll-holders 5 between the open and closed positions.
  • said actuating means 9 comprises at least one ball-bearing actuator 10 kinematically connected with the roll-holders 5.
  • the ball-bearing actuator 10 has a single lead screw 11 coaxial with the rolling axis "X" and a lead screw nut 12 rotatably in engagement on the lead screw 11.
  • the lead screw 11 is prevented from rotating, is movable in translation along the rolling axis "X” and is kinematically connected with the roll-holders 5.
  • An auxiliary motor 13 (Fig. 1) connected to the lead screw nut 12 drives the lead screw nut 12 in rotation and causes translation of the screw 11.
  • the actuating means 9 further comprises a motion-transmitting member 14 installed at one end 11a of the lead screw 11 and coupled with the roll-holders 5 to convert translation of the lead screw 11 along the rolling axis "X" into a movement of the roll-holders 5 between the open position and the closed position (Fig. 2) .
  • head 1 has a casing 15 inside which the lead screw nut 12 is rotatably housed, supported by roller and/or ball bearings 16.
  • Casing 15 does not rotate but carries out a translation relative to the base frame of the machine moved by the above mentioned actuating means to take a position close to the axial portion of the end of pipe 2 designed to be machined.
  • the rotating body 3 is rotatably coupled, through respective roller bearings 17 for example, with casing 15, and the lead screw 11 carries out a translation both in the casing 17 and in the rotating body 3.
  • the lead screw nut 12 on its outer circumferential surface has a toothing 18 in which a flexible transmission element 19, preferably a chain trained around a shaft 20 of the auxiliary motor 13 is engaged, to transmit motion from the auxiliary motor 13 to the lead screw nut 12 (Figs. 1, 2 and 3).
  • a transmission 21 interposed between the main motor 4a and the rotating body 3 allows motion to be transmitted from said main motor 4a to said rotating body 3.
  • the rotating body 3 is provided with a toothing 22 around which a flexible element 23 is partly wrapped, a toothed belt for example, also passing over a shaft 24 of the main motor 4a.
  • the motion-transmitting member 14 comprises a support element 25 for each of the roll-holders 5 mounted on the rotating body 3 and movable along a respective direction "Z" orthogonal to the rolling axis "X".
  • each support element 25 is slidably inserted in a groove 26 having a radial extension and formed in the rotating body 3 (Figs. 1 and 3).
  • grooves 26 are spaced apart the same distance from each other through an angle of 120° and open on base 3a of the rotating body 3 to enable each support element 25 to carry the respective roll-holder 5 in cantilevered fashion (Fig. 1).
  • the motion-transmitting member 14 further comprises a coupling element 27 mounted on the first end 11a of the lead screw 11 within the rotating body 3.
  • the motion-transmitting member 14 is slidably associated with the support element 25 along a respective sloping surface 28 inclined relative to the rolling axis "X". In the embodiment shown, the sloping surfaces 28 converge towards the rolling axis "X" and towards each other moving away from the first end 11a of the lead screw 11.
  • the coupling element 27 is rotatably mounted on the lead screw 11 and rotates together with the rotating body 3.
  • the coupling element 27 comprises a cylindrical body 29 coaxial with the lead screw 11 (Fig. 3) and coupled therewith by means of bearings 30 (Fig. 2).
  • the cylindrical body 29 has at least three slits 31 formed at a side surface thereof, which slits 31 extend over the whole height of the cylindrical body 29 along a direction substantially parallel to the rolling axis "X".
  • Each slit 31 further has a varying depth to define a respective sloping surface 28, and slidably receives a respective support element 25 extending along a radial direction relative to the rolling axis "X".
  • Each slit 31 is such shaped as to be able to exert both a thrust action away from the rolling axis "X" and a pulling action close to the same axis "X", on the support element 25.
  • each slit 31 has, seen in cross-section relative to the rolling axis "X", a T-shaped conformation, in which the upper horizontal segment of the "T" faces the rolling axis "X".
  • the sloping surface 28 of each slit 31 is therefore formed of the bottom surface 28a of the slit 31 itself and of two auxiliary surfaces 28b of said slit 31 facing the bottom surface 28a.
  • each support element 25 has an end 25a the shape of which matches that of the slit 31 and which is housed in the slit 31 itself.
  • the cylindrical body 29 is installed in a hollow space 3b formed in the rotating body 3 the size of which that is parallel to the rolling axis "X" is bigger than the axial size of the cylindrical body 29, to enable translation of the cylindrical body 29 itself together with the lead screw 11.
  • head 1 also comprises a programmable control device 32 of the CNC (an acronym meaning Computerised Numerical Control) type, interlocked with the actuating means 9 to move the roll-holders 5 between the open and closed positions so as to control closing and opening of said roll-holders 5.
  • CNC Computerised Numerical Control
  • the CNC control device 32 is connected with the auxiliary motor 13 and preferably also with the main motor 4a and the machine means capable of actuating the head 1 for translation, in order to control the head-actuating means 1, the auxiliary motor 13 and main motor 4a in synchronism and co-ordinate all movements of the head 1 and rolls 6.
  • the control through the CNC device in particular enables the head 1 to be moved along the axis of pipe 2 by combining this movement with opening/closing of rolls 6 on pipe 2 and with the rotation of the rotating body 3, so as to carry out a dynamic shaping that is a combination of the three movements and not only a function of the shape of rolls 6.
  • the head 1 is moved forward by the actuating means of the machine, towards the pipe 2 to be rolled which is clamped by the vice, with the rolling axis "X" that is coincident with the longitudinal axis of the pipe 2 and the roll-holders 5 in the open position.
  • the lead screw 11 In the open position, the lead screw 11 lies in a backward position with its first end 11a and the cylindrical body 29 axially spaced apart from the roll-holders 5. With reference to the sectional view of the head in Fig. 2, the backward position corresponds to displacement to the left of screw 14.
  • Moving forward of head 1 leads rolls 6 to arrange themselves around the end of pipe 2, the pin 8 being inserted in pipe 2.
  • the auxiliary motor 13 driven by the CNC control device 32, causes rotation of the lead screw nut 12 in a predetermined direction, so as to move forward the lead screw 11 and the cylindrical body 29 towards the roll-holders 5 (to the right in Fig. 2).
  • Moving forward of the cylindrical body 29 causes sliding of the ends 25a of the support elements 25 housed in the slits 31 relative to the cylindrical body 29 itself, and approaching of the support elements 25 slidable in the respective grooves 26, to the rolling axis "X".
  • the radial translation of the support elements 25 towards the rolling axis "X” is caused by the pulling action exerted by the auxiliary surfaces 28b on the ends 25a of the support elements 25 themselves (Fig. 3).
  • Approaching between the rolls 6 and the rolling axis "X", and therefore the closing degree, is a function of the number of revolutions of the lead screw nut 12.
  • the main motor 4a sets the rotating body 3 in rotation to cause the rolls 6 to roll on pipe 2 and leave their impression on the outer surface of the pipe 2 itself.
  • the auxiliary motor 13 causes rotation of the lead screw nut 12 in the opposite direction and the backward movement of the lead screw 11 and of the cylindrical body 29 (to the left in Fig. 2).
  • the backward movement of the cylindrical body 29 makes the support element 25 move away from the rolling axis "X".
  • the radial translation of the support elements 25 away from the rolling axis "X” is caused by the thrust action exerted by the bottom surface 28a of groove 31 on the ends 25a of the support elements 25 themselves (Fig. 3).
  • the invention achieves important advantages.
  • the rolling head in accordance with the present invention allows rolling operations to be carried out either on pipes of different diameters, or on the same pipes but with different impression depths, without dismantling and repositioning of the head elements being required in order to conform the stroke of the rolls towards the rolling axis to the type of pipe or the type of working.
  • the radial displacement of the rolls of the head being the object of the invention is a direct function of the axial displacement of the lead screw and therefore of the rotation of the lead screw nut.
  • the number of revolutions imparted to the lead screw nut being known, also the exact radial position of the rolls is known.
  • the head of the invention is able to carry out rolling operations with very narrow tolerances.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Bending Of Plates, Rods, And Pipes (AREA)
  • Reduction Rolling/Reduction Stand/Operation Of Reduction Machine (AREA)
  • Transmission Devices (AREA)
EP04425534A 2004-07-19 2004-07-19 Tête de roulage de tubes et machine à former des tubes comprenant la dite tête Expired - Lifetime EP1618973B1 (fr)

Priority Applications (2)

Application Number Priority Date Filing Date Title
EP04425534A EP1618973B1 (fr) 2004-07-19 2004-07-19 Tête de roulage de tubes et machine à former des tubes comprenant la dite tête
DE602004006511T DE602004006511T2 (de) 2004-07-19 2004-07-19 Rollkopf für Rohre und Umformmaschine mit einem solchen Rollkopf

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
EP04425534A EP1618973B1 (fr) 2004-07-19 2004-07-19 Tête de roulage de tubes et machine à former des tubes comprenant la dite tête

Publications (2)

Publication Number Publication Date
EP1618973A1 true EP1618973A1 (fr) 2006-01-25
EP1618973B1 EP1618973B1 (fr) 2007-05-16

Family

ID=34932643

Family Applications (1)

Application Number Title Priority Date Filing Date
EP04425534A Expired - Lifetime EP1618973B1 (fr) 2004-07-19 2004-07-19 Tête de roulage de tubes et machine à former des tubes comprenant la dite tête

Country Status (2)

Country Link
EP (1) EP1618973B1 (fr)
DE (1) DE602004006511T2 (fr)

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN100506420C (zh) * 2006-04-05 2009-07-01 沈伟志 金属管包管机
CN102921822A (zh) * 2012-11-07 2013-02-13 卓旦春 一种阀门缩口装置
CN103143634A (zh) * 2013-03-22 2013-06-12 惠州市博赛数控机床有限公司 一种旋压收口机
US11370015B2 (en) 2018-05-11 2022-06-28 Stolle Machinery Company, Llc Drive assembly
IT202200023409A1 (it) * 2022-11-14 2024-05-14 Grazioli Cesare S R L Macchina rullatrice

Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3851515A (en) * 1973-09-04 1974-12-03 C Hautau Apparatus for cutting or deforming a workpiece
FR2282953A1 (fr) * 1974-08-30 1976-03-26 Mannesmann Roehren Werke Ag Machine pour munir les tubes d'une soie
US5467627A (en) * 1994-01-05 1995-11-21 Wauseon Machine And Manufacturing, Inc. End finisher machine
JPH0871660A (ja) * 1994-09-06 1996-03-19 ▲吉▼川鐵工株式会社 フランジ付ワークの絞り加工装置
JP2000190031A (ja) * 1998-10-13 2000-07-11 Toyota Motor Corp 絞り加工方法および絞り加工装置
US6216512B1 (en) * 1993-11-16 2001-04-17 Sango Co., Ltd. Method and apparatus for forming a processed portion of a workpiece

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3851515A (en) * 1973-09-04 1974-12-03 C Hautau Apparatus for cutting or deforming a workpiece
FR2282953A1 (fr) * 1974-08-30 1976-03-26 Mannesmann Roehren Werke Ag Machine pour munir les tubes d'une soie
US6216512B1 (en) * 1993-11-16 2001-04-17 Sango Co., Ltd. Method and apparatus for forming a processed portion of a workpiece
US5467627A (en) * 1994-01-05 1995-11-21 Wauseon Machine And Manufacturing, Inc. End finisher machine
JPH0871660A (ja) * 1994-09-06 1996-03-19 ▲吉▼川鐵工株式会社 フランジ付ワークの絞り加工装置
JP2000190031A (ja) * 1998-10-13 2000-07-11 Toyota Motor Corp 絞り加工方法および絞り加工装置

Non-Patent Citations (2)

* Cited by examiner, † Cited by third party
Title
PATENT ABSTRACTS OF JAPAN vol. 1996, no. 07 31 July 1996 (1996-07-31) *
PATENT ABSTRACTS OF JAPAN vol. 2000, no. 10 17 November 2000 (2000-11-17) *

Cited By (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN100506420C (zh) * 2006-04-05 2009-07-01 沈伟志 金属管包管机
CN102921822A (zh) * 2012-11-07 2013-02-13 卓旦春 一种阀门缩口装置
CN103143634A (zh) * 2013-03-22 2013-06-12 惠州市博赛数控机床有限公司 一种旋压收口机
CN103143634B (zh) * 2013-03-22 2016-12-28 惠州市博赛数控机床有限公司 一种旋压收口机
US11370015B2 (en) 2018-05-11 2022-06-28 Stolle Machinery Company, Llc Drive assembly
IT202200023409A1 (it) * 2022-11-14 2024-05-14 Grazioli Cesare S R L Macchina rullatrice
WO2024105558A1 (fr) * 2022-11-14 2024-05-23 Grazioli Cesare S.R.L. Machine de laminage

Also Published As

Publication number Publication date
EP1618973B1 (fr) 2007-05-16
DE602004006511D1 (de) 2007-06-28
DE602004006511T2 (de) 2008-01-31

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