EP0990471A1 - Biegemaschine - Google Patents

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Publication number
EP0990471A1
EP0990471A1 EP98830579A EP98830579A EP0990471A1 EP 0990471 A1 EP0990471 A1 EP 0990471A1 EP 98830579 A EP98830579 A EP 98830579A EP 98830579 A EP98830579 A EP 98830579A EP 0990471 A1 EP0990471 A1 EP 0990471A1
Authority
EP
European Patent Office
Prior art keywords
tube
bending
forming dies
movement
bending tool
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Withdrawn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
EP98830579A
Other languages
English (en)
French (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.)
Fabbrica Macchine Curvatubi Crippa Agostino SpA
Original Assignee
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 Fabbrica Macchine Curvatubi Crippa Agostino SpA filed Critical Fabbrica Macchine Curvatubi Crippa Agostino SpA
Priority to EP98830579A priority Critical patent/EP0990471A1/de
Publication of EP0990471A1 publication Critical patent/EP0990471A1/de
Withdrawn legal-status Critical Current

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    • 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
    • B21D11/00—Bending not restricted to forms of material mentioned in only one of groups B21D5/00, B21D7/00, B21D9/00; Bending not provided for in groups B21D5/00 - B21D9/00; Twisting
    • B21D11/06—Bending into helical or spiral form; Forming a succession of return bends, e.g. serpentine form
    • B21D11/07—Making serpentine-shaped articles by bending essentially in one plane
    • 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
    • B21D7/00—Bending rods, profiles, or tubes
    • B21D7/02—Bending rods, profiles, or tubes over a stationary forming member; by use of a swinging forming member or abutment
    • B21D7/021—Construction of forming members having more than one groove
    • 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
    • B21D7/00—Bending rods, profiles, or tubes
    • B21D7/02—Bending rods, profiles, or tubes over a stationary forming member; by use of a swinging forming member or abutment
    • B21D7/022—Bending rods, profiles, or tubes over a stationary forming member; by use of a swinging forming member or abutment over a stationary forming member only
    • 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
    • B21D7/00—Bending rods, profiles, or tubes
    • B21D7/12—Bending rods, profiles, or tubes with programme control

Definitions

  • the present invention relates to a tube bending machine.
  • the tube bending machine being the object of the invention is intended for bending tubes into right or left bends, due to the presence of a roller or movable bending tool capable of setting itself to the right or to the left of the tube before the beginning of each bending operation.
  • tube bending machines intended for making right and left bends on one and the same tube are generally employed for accomplishing articles such as coils and the like. These machines are provided with a fixed supporting frame on which a chuck for gripping the tube to be bent slides. The chuck is generally movable along the longitudinal axis of the tube for positioning a front portion thereof to the desired region where the bending tools operate.
  • a first and a second forming dies disposed close to each other are present, as well as a bending tool carried by a rocking arm capable of performing curved trajectories around either of said first and second forming dies, depending on whether right or left bends are wished to be made.
  • the bending tool usually consists of a roller which, if a right bend is wished to be made, is positioned to the left of the tube to be bent and therefore, through a movement of the rocking arm carrying the roller itself, said roller performs a curved trajectory around the right forming die leading the tube to undergo a deformation according to a shape almost similar to that of the throat present in the forming die.
  • the bending tool or roller will have to step over the tube going to the right of the latter, and then to carry out a curved trajectory around the left forming die in the same manner as previously described. Between two subsequent bends the chuck carried by the supporting frame will execute the necessary axial displacements.
  • This type of apparatus has found wide consent on the market in that it enables tubes even provided with many right and left bends alternated with each other to be obtained in a very short period of time without requiring that the tube to be bent should be set in rotation around its own axis; it should be noted in this connection that a 180° rotation of the tube around its own axis may be difficult, above all as the tube bending goes on, due to the possibility of interferences between the already bent tube portion and the machine body, which greatly restrains the operating flexibility of the manufacturing machine taken as a whole.
  • a bend obtained with the traditional systems is the result of optimizing the bending roller position relative to the forming dies; this optimization is usually carried out depending on the die diameter, the section and material of the tube to be bent.
  • a tube bending machine particularly intended for carrying out right and left bends in accordance with the present invention, has been generally identified by reference numeral 1.
  • the tube bending machine 1 has a fixed supporting frame 2 above which grip means 3 for holding at least one tube to be bent 4 operates.
  • the grip means 3 usually consists of a chuck 5 movable by translation relative to the supporting frame in a direction 6 parallel to the longitudinal axis of the tube 4 to be submitted to processing.
  • the grip means is capable of ensuring a desired axial positioning of the tube 4 on the supporting frame 2, in particular relative to the first and second forming dies, 7 and 8, operatively associated with a front head 2a of the supporting frame itself.
  • These forming dies 7 and 8 are disposed in mutual side by side relationship and are active on the tube for executing right or left bends, as better described in detail in the following.
  • tube 4 extends between the first and second forming dies disposed in mutual side by side relationship and is bent around the first one or second one of these dies, depending on whether right or left bends respectively are wished to be made.
  • a bending tool 9 which consists of a roller for example or a small pulley selectively cooperating with the first one or second one of the forming dies.
  • the bending tool 9 is connected with the supporting frame upon interposition of movement means 10 enabling the bending tool to be moved relative to the forming dies.
  • the movement means 10 comprises a first movement member 11 moving the bending tool 9 along a curved trajectory for carrying out bending of the tube around the first or second forming dies.
  • the first movement member 11 is preferably made up of a rocking arm in engagement with the supporting frame for oscillation around a rotation axis 11a transverse, and preferably vertical, to the longitudinal axis of the tube extending at an intermediate position between the two forming dies 7 and 8.
  • the rotation axis 11a around which arm 11 oscillates extends in a vertical symmetry plane of the first forming die with respect to the second one.
  • the bending centre of the curved trajectory described by the bending tool is substantially at an intermediate position between the two forming dies.
  • the movement means 10 also comprises a second movement member 12 capable of moving the bending tool 9 close to and away from the forming dies along directions transverse to said dies.
  • the second movement member 12 comprises a slide 13 mounted on the rocking arm 11 and connected to the bending tool in a kinematic manner.
  • This slide receives action from a first actuator member 14, a fluid-operated cylinder or an electric stepper motor for example, which is also carried by the rocking arm 11 and is capable of moving the slide away from and close to the forming dies 7 and 8 along said transverse directions; as can be viewed from the depicted examples, slide 13 moves radially relative to the forming dies 7 and 8 and carries out a translation relative to arm 11, so as to modify the distance between the bending tool 9 and the forming die intended for use.
  • a first actuator member 14 a fluid-operated cylinder or an electric stepper motor for example
  • the first actuator member 14 is managed by a control unit 15 controlling the actuator itself in such a manner that a plurality of positions are determined for the bending tool 9 relative to the forming dies along said directions.
  • the bending tool will be able to take the desired distance from the active profile of the forming die being used.
  • control unit 15 will be able to act on the actuator member and continuously modify the bending tool position along said transverse directions, i.e. it will be able to carry out a radial movement of roller 9 close to or away from the active profile of the forming die being used, as bending goes on.
  • control unit is operatively active both on the first actuator member 14 and the actuator member (not shown) causing rotation of arm 11, carrying out control of the radial position of the bending tool or roller 9 according to the parameters set by the user during the whole bending operation, i.e. during rotation of the rocking arm around the forming die being used.
  • the movement means further comprises a third member 16 which too is operatively interposed between the fixed frame 2 and the bending tool 9 and, in the embodiment shown in Fig. 1, is carried by the rocking arm 11.
  • the third movement member 16 is interposed between the slide 13 and the bending tool 9 and moves the latter up and down relative to the forming dies.
  • This movement in combination with the movement imparted by the rocking arm, enables the bending tool to be moved to the right or to the left of the tube, in order to make this tool cooperate with either of the forming dies, depending on requirements.
  • the third movement member 16 comprises a second actuator member 17 active on a drive linkage 18, in turn arranged for moving the bending tool along a curved trajectory, preferably lying in a vertical plane.
  • the second actuator member 17 and drive linkage 18 are carried by the moving-along slide mounted on the rocking arm 11.
  • forming dies 7 and 8 bending tool 9 and movement means 10 can be carried by a true bending head 19 which is movable relative to the fixed supporting frame.
  • the bending head 19 is mounted on the supporting frame 2 close to a front end of said frame, upon interposition of interconnecting means 20 enabling the head to be displaced in at least one first auxiliary direction 21 transverse to the longitudinal axis of the tube to be bent.
  • this first auxiliary direction 21 is preferably vertical, so that a displacement of the forming dies 7, 8 in this direction may be enabled.
  • first and second forming elements 7a, 7b; 8a, 8b may have bending radii differentiated from each other so that the machine 1 can automatically carry out bending operations following different radii.
  • the vertical travel of head 19 along direction 21 is required to be adequate, i.e. depending on the necessary displacements for selecting each of the superposed elements of dies 7 and 8.
  • an auxiliary movement unit 22 is provided which is carried either by the bending head or directly by the supporting frame and is active on the forming dies for moving them from a condition in which they are close to the tube to be bent, to a condition in which they are spaced apart from the tube to be bent (shown in chain line in Fig. 1) and vice versa.
  • the interconnecting means 20 between the bending head and fixed frame can be in a position to also enable a displacement of the head itself along a second auxiliary direction 23 transverse to the longitudinal axis of the tube to be bent and transverse to said first auxiliary direction 21.
  • the interconnecting means between head and frame enabling the head to move along said first and second transverse directions, consists of respective slides and actuator members (not shown).
  • control unit 15 is preferably connected to each of the actuator members intended for carrying out the above described movements of head 19, tool 9, dies 7 and 8 in such a manner that the machine freedom degrees are coordinated in accordance with the program set by the user.
  • the head itself taken as a whole, can act as a handling member for picking up and laying down the tube from and into loading and unloading stations respectively, typically located close to the tube bending machine.
  • said grip means 3 may be provided to comprise an end portion defining an auxiliary forming die 24.
  • the second movement member is capable of carrying out such a travel that the bending tool 9 is brought to cooperate with the auxiliary forming die 24, in a condition in which the forming dies 7 and 8 are spaced apart from the tube to be bent.
  • the auxiliary movement unit 22 can be operated for opening the first and second forming dies wide and enabling a movement of the bending tool 9 until the grip means so as to carry out bending of the tube around the auxiliary forming tool 24 that, typically, will have a differentiated shape and/or diameter relative to those of the forming dies.
  • the auxiliary forming tool has a very reduced bending radius and is employed every time bends of small radius or consecutive bends where each bend is provided to be very close to the next adjacent one are required to be made.
  • chuck 5 in addition to being movable along the longitudinal axis of the tube to be bent, may be also provided with means for setting the tube in rotation around said longitudinal axis, in order the give the machine more operating flexibility and the capability of carrying out even unflat bends.
  • the grip chuck 5 brings a front portion of the tube close to the pair of forming dies 7 and 8 that at a first moment are open wide and spaced apart from each other.
  • the forming dies are moved close to each other and brought close to the tube, once the latter has reached the desired axial position.
  • the movement means 10 carries out displacement of the roller or bending tool 9 which sets itself to the right or to the left of the tube to be bent, depending on the required type of bending.
  • the grip chuck makes the tube to be bent move forward and/or rotate around its own axis.
  • the forming dies 7, 8 are opened wide, by virtue of the auxiliary movement unit, and the bending tool or roller are brought close to and in cooperation with said auxiliary forming die 24.
  • the invention achieves important advantages.
  • the tube bending machine in reference enables bends to the right and to the left to be made with an accuracy never reached until now, because not only it is possible to optimize the distance of the bending tool from the forming dies depending on the sizes of said dies and the typology of the tube to be bent, but it is also possible to continuously adjust the radial distance of the bending tool from the forming dies during the whole bending step, i.e. during the angular movement of the rocking arm.
  • bends of 180 and more degrees can be easily obtained without problems arising in terms of effort concentrations or local material unstabilization because the whole bending step is controlled in a very precise manner.
  • auxiliary forming die positioned at the chuck, which not only offers the possibility of bends having a differentiated diameter as compared with that of the first and second forming dies, but also enables consecutive connections to be made at a short distance from each other, if desired.
  • the whole apparatus may be adapted for working with forming dies having differentiated radii and carrying out loading and unloading operations in an independent manner.
  • any type of bending process can be optimized in the best manner.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Bending Of Plates, Rods, And Pipes (AREA)
EP98830579A 1998-09-30 1998-09-30 Biegemaschine Withdrawn EP0990471A1 (de)

Priority Applications (1)

Application Number Priority Date Filing Date Title
EP98830579A EP0990471A1 (de) 1998-09-30 1998-09-30 Biegemaschine

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
EP98830579A EP0990471A1 (de) 1998-09-30 1998-09-30 Biegemaschine

Publications (1)

Publication Number Publication Date
EP0990471A1 true EP0990471A1 (de) 2000-04-05

Family

ID=8236813

Family Applications (1)

Application Number Title Priority Date Filing Date
EP98830579A Withdrawn EP0990471A1 (de) 1998-09-30 1998-09-30 Biegemaschine

Country Status (1)

Country Link
EP (1) EP0990471A1 (de)

Cited By (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP1129797A2 (de) * 2000-03-03 2001-09-05 Matthias Scheerschmidt Einrichtung zum Biegen von Rohrleitungen
FR2833868A1 (fr) * 2001-12-20 2003-06-27 Silfax Machine a cintrer les tubes et son dispositif de cintrage a gauche et/ou a droite
FR2841162A1 (fr) * 2002-06-25 2003-12-26 Silfax Support de reglette pour machine a cintrer les tubes
EP1533052A1 (de) * 2003-11-19 2005-05-25 Pedrazzoli Ibp spa Rohrbiegevorrichtung
CN102886407A (zh) * 2012-09-19 2013-01-23 河南平高电气股份有限公司 一种弧形零件弯形加工装置
CN103920773A (zh) * 2014-04-14 2014-07-16 张曙光 一种直线型加热炉炉管的弯曲工艺
CN103920771A (zh) * 2014-04-14 2014-07-16 张烨 一种直线型加热炉炉管的弯曲工艺
CN103934331A (zh) * 2014-04-14 2014-07-23 吕琦滨 一种直线型加热炉炉管的弯曲工艺
CN103934334A (zh) * 2014-04-14 2014-07-23 傅勇刚 一种直线型加热炉炉管的弯曲工艺

Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB1326048A (en) * 1969-12-13 1973-08-08 Hilgers Maschinen Und Apparate Tube bending machine
EP0257182A2 (de) * 1986-08-13 1988-03-02 Rigobert Dipl.-Ing. Schwarze Rohrbiegemaschine
US4843859A (en) * 1987-07-14 1989-07-04 Chiyoda Kogyo Co., Ltd. Pipe bender
US5010758A (en) * 1984-03-23 1991-04-30 Chiyoda Kogyo Co., Ltd. Bending machine
EP0538207A2 (de) * 1991-10-16 1993-04-21 FABBRICA MACCHINE CURVATUBI CRIPPA AGOSTINO S.p.A. Multi-funktionnelle Rohrbiegemaschine
EP0649688A1 (de) * 1993-10-21 1995-04-26 Rigobert Dipl.-Ing. Schwarze Doppelkopf-Rohrbiegemaschine
EP0759332A1 (de) * 1995-08-22 1997-02-26 Rigobert Dipl.-Ing. Schwarze CNC-gesteuerte Rohrbiegemaschine

Patent Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB1326048A (en) * 1969-12-13 1973-08-08 Hilgers Maschinen Und Apparate Tube bending machine
US5010758A (en) * 1984-03-23 1991-04-30 Chiyoda Kogyo Co., Ltd. Bending machine
EP0257182A2 (de) * 1986-08-13 1988-03-02 Rigobert Dipl.-Ing. Schwarze Rohrbiegemaschine
US4843859A (en) * 1987-07-14 1989-07-04 Chiyoda Kogyo Co., Ltd. Pipe bender
EP0538207A2 (de) * 1991-10-16 1993-04-21 FABBRICA MACCHINE CURVATUBI CRIPPA AGOSTINO S.p.A. Multi-funktionnelle Rohrbiegemaschine
EP0649688A1 (de) * 1993-10-21 1995-04-26 Rigobert Dipl.-Ing. Schwarze Doppelkopf-Rohrbiegemaschine
EP0759332A1 (de) * 1995-08-22 1997-02-26 Rigobert Dipl.-Ing. Schwarze CNC-gesteuerte Rohrbiegemaschine

Cited By (17)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP1129797A3 (de) * 2000-03-03 2001-12-05 Matthias Scheerschmidt Einrichtung zum Biegen von Rohrleitungen
EP1129797A2 (de) * 2000-03-03 2001-09-05 Matthias Scheerschmidt Einrichtung zum Biegen von Rohrleitungen
US7213430B2 (en) 2001-12-20 2007-05-08 Silfax Tube bending machine and its right and/or left bending device
FR2833868A1 (fr) * 2001-12-20 2003-06-27 Silfax Machine a cintrer les tubes et son dispositif de cintrage a gauche et/ou a droite
WO2003053606A1 (fr) * 2001-12-20 2003-07-03 Silfax Machine a cintrer les tubes et son dispositif de cintrage a gauche et/ou a droite
FR2841162A1 (fr) * 2002-06-25 2003-12-26 Silfax Support de reglette pour machine a cintrer les tubes
US7143621B2 (en) 2002-06-25 2006-12-05 Jean Paul Bruyas Guide support for a tube-bending machine
WO2004000479A1 (fr) * 2002-06-25 2003-12-31 Silfax Support de reglette pour machine a cintrer
EP1533052A1 (de) * 2003-11-19 2005-05-25 Pedrazzoli Ibp spa Rohrbiegevorrichtung
CN102886407A (zh) * 2012-09-19 2013-01-23 河南平高电气股份有限公司 一种弧形零件弯形加工装置
CN103920773A (zh) * 2014-04-14 2014-07-16 张曙光 一种直线型加热炉炉管的弯曲工艺
CN103920771A (zh) * 2014-04-14 2014-07-16 张烨 一种直线型加热炉炉管的弯曲工艺
CN103934331A (zh) * 2014-04-14 2014-07-23 吕琦滨 一种直线型加热炉炉管的弯曲工艺
CN103934334A (zh) * 2014-04-14 2014-07-23 傅勇刚 一种直线型加热炉炉管的弯曲工艺
CN103934331B (zh) * 2014-04-14 2015-08-26 董璞玉 一种直线型加热炉炉管的弯曲工艺
CN103934334B (zh) * 2014-04-14 2015-09-16 楼碧云 一种直线型加热炉炉管的弯曲工艺
CN103920773B (zh) * 2014-04-14 2016-02-24 楼碧云 一种直线型加热炉炉管的弯曲工艺

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