WO1987000096A1 - Machine de cintrage de tuyaux - Google Patents

Machine de cintrage de tuyaux Download PDF

Info

Publication number
WO1987000096A1
WO1987000096A1 PCT/GB1986/000378 GB8600378W WO8700096A1 WO 1987000096 A1 WO1987000096 A1 WO 1987000096A1 GB 8600378 W GB8600378 W GB 8600378W WO 8700096 A1 WO8700096 A1 WO 8700096A1
Authority
WO
WIPO (PCT)
Prior art keywords
bending
drive means
pipe
arm
die
Prior art date
Application number
PCT/GB1986/000378
Other languages
English (en)
Inventor
Alan Laycock
Robert Frederick Gardner
Original Assignee
Integrated Production Machines Limited
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
Priority claimed from GB858516366A external-priority patent/GB8516366D0/en
Priority claimed from GB858528101A external-priority patent/GB8528101D0/en
Application filed by Integrated Production Machines Limited filed Critical Integrated Production Machines Limited
Publication of WO1987000096A1 publication Critical patent/WO1987000096A1/fr

Links

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
    • 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
    • B21D7/024—Bending rods, profiles, or tubes over a stationary forming member; by use of a swinging forming member or abutment by a swinging forming member
    • 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
    • B21D9/00—Bending tubes using mandrels or the like
    • B21D9/05—Bending tubes using mandrels or the like co-operating with forming members
    • B21D9/07—Bending tubes using mandrels or the like co-operating with forming members with one or more swinging forming members engaging tube ends only
    • B21D9/073—Bending tubes using mandrels or the like co-operating with forming members with one or more swinging forming members engaging tube ends only with one swinging forming member

Definitions

  • This invention relates to a pipe or tube bending machine of the draw bending type.
  • a draw bending machine comprises a bending die and a clamp for clamping the pipe to the bending die.
  • the bending die is turned under power about its axis, and this movement of the bending die is transmitted to the clamp to rotate the clamp along with the bending die, and thus bend the pipe.
  • the clamp is then released and an arm which carries the clamp is rotated under power back to its initial position.
  • a pipe bending machine having a bending die, drive means for turning the bending die about its axis when effecting a bending operation, an arm which carries a clamp for clamping the pipe to the bending die, and a separate drive means acting on said arm and serving to turn that arm around the bending axis simultaneously with the bending die being turned to effect the bending operation.
  • a separate drive means has hitherto been provided for the clamp arm, but has served only to return the clamp arm to its initial position.
  • the separate drive means is used additionally for turning the clamp arm during the bending operation.
  • a first hydraulic actuator may provide drive to the bending die and a second hydraulic actuator may provide drive to the clamp arm.
  • an a.c. electric motor with servo-control may provide the main drive and be coupled to drive either the bending die or the clamp arm.
  • the drive to the other element may be provided by either an a.c. or d.c. motor with servo-control, or by a hydraulic drive means.
  • the drive to one element is able to provide greater torque to that element thanthe other driveis able to provide to the other element when carrying out a bending operation.
  • the main drive means may then be controlled to provide a braking effect towards the end of each bending movement, and in the limit to overcome the drive to the other element and stop both the bending die and clamp arm at precisely the required position.
  • This arrangement is particularly appli ⁇ cable if an electric servo-motor is used for the main drive and, for the other drive hydraulic means is used, or an electric motor (whether a.c. or d.c.) is used in a constant- torque mode (its servo-control mode being used for return ⁇ ing the e.g. clamp arm to its starting position). If the assisting drive is provided by e.g.
  • hydraulic means this may be controlled to provide a reduced value of torque and/or speed to its driven element over a final portion of its movement both when bending and returning to its home position: for example the flow rate of hydraulic fluid to the hydraulic actuator may be reduced for these final portions of movement.
  • FIGURE 1 is a diagrammatic plan view of an example of pipe bending machine
  • FIGURE 2 is a section on the line U-TT of Figure 1;
  • FIGURE 3 is a schematic diagram of one form of drive system for the machine;
  • FIGURE 4 is a schematic diagram of another form of drive system for the machine.
  • FIG. 1 and 2 of the drawings there is shown a pipe bending machine of the draw bending type.
  • This particular machine is arranged to process two pipes simultaneously, particularly when forming "handed" pairs of pipes: however, the machine may instead be arranged simply to handle one pipe at a time.
  • the machine comprises a horizontal machine bed 9 mounting a bending head 10 at its forward end.
  • This com ⁇ prises a bending die 12 of generally cylindrical form and mounted for rotation about its axis, which is disposed vertically.
  • the bending die 12 is formed with two annular grooves 14 spaced apart from each other and being semi ⁇ circular in section.
  • the bending die 12 is provided with a short, flat-faced, tangential extension 12a_ which has two grooves forming tangential extensions of the grooves 14.
  • a clamp block 16 is provided to co-operate with the extension 12a_ and is formed with two semi-circular grooves horizontally across its face, so that it can clamp two pipes 1, 2 against the bending die 12.
  • the clamp block 16 is mounted to an arm 18 for sliding movement by an hydraulic actuator 17 towards and away from the bending die extension 12a_: the arm 18 is mounted for rotating about the axis of the bending die 12 so that it can be turned with the bending die during a bending operation.
  • the bending die 12 is mounted to a spindle 40 which is journalled to fixed structure 42 of the machine.
  • a sprocket 44 is keyed to spindle 40 and a chain 45 is trained about this sprocket
  • the clamp arm 18 is generally U-shaped as shown and its two limbs are journalled about the spindle 40: its upper limb carries the clamp block 16 and its lower limb carries a i ⁇ sprocket 46, a chain 46a being trained about this sproc ⁇ ket to transmit drive from a separate drive means 47 ( Figure 1), for turning the clamp arm around the spindle 40 (and hence around the axis A-A).
  • the bending head 10 further comprises a pressure
  • the pre ⁇ ssure die 20 mounted to the machine bed and having a flat front surface formed with two semi-circular section grooves co ⁇ operating with the grooves of the bending die.
  • the pre ⁇ ssure die 20 is movable towards and away from the bending die by a hydraulic actuator 21, and is mounted so that
  • a wiper die 22 may also be provided, fixed to the machine bed 9, and positioned opposite the pressure die 20 and shaped at its forward end to fit close against the bending die 12. The flat rear surface of the wiper die
  • 25 22 is also provided withtwo semi-circular grooves co ⁇ operating with the grooves of the pressure die 20-
  • the bending machine further comprises two pipe or tube holders mounted one above the other on a carriage 24: one only of these holders is shown at 26.
  • Each pipe holder 26 compri ⁇ ses a cylindrical body through which, in use, the pipe extends, and is provided with a collet 26a ⁇ which can be
  • the two pipe holder bodies are rotatable about their axes and coupled to a drive motor 27 so that they will rotate through equal angles but in opposite directions.
  • the machine also comprises two mandrels 28 carried at the ends of respective mandrel rods 30.
  • the mandrels are positioned in the pipes to support the latter inter ⁇ nally immediately upstream of the bend.
  • the mandrel rods are mounted by holders 31 (one shown) to the machine bed beyond the trailing ends of the pipes being processed.
  • the machine is controlled by a computer numerical control system 50. In use, with two pipes 1, 2 over the mandrels and mandrel rods and held in their pipe holders 26, then firstly the control serves to advance the carriage 24 to position the two pipes correctly, relative to the bend- ing head, ready for the first bend to be made.
  • the pressure die 20 is advanced to press the pipes 1, 2 against the bending die, and the clamping block 16 is advanced to clamp the two pipes securely against the bending die, its slide engaging into the bend spindle to provide a keyed location.
  • the bending die 12 and clamp arm is advanced to clamp the two pipes securely against the bending die, its slide engaging into the bend spindle to provide a keyed location.
  • the carriage 24 is next advanced an appropriate amount so as to position the pipes 1, 2 correctly for the next bend.
  • the bending die 12 is returned to its initial position by its drive means acting via sprocket 44, and the pressure die 20 is also returned to its original posi ⁇ tion. If the next bend in the pipes is to be effected in a different plane from the first bend, then the pipe holders 26 are turned through the appropriate angle (but in opposite directions, as mentioned above). That next bend in the pipes 1, 2 is then carried out in the same manner as explained above, and the whole sequence of steps is repeated for all the following bends which are to be made in the pipes.
  • Figures 3 and 4 show various combinations of arrange ⁇ ments by way of examples.
  • an a.c. electric motor M provides drive via a gearbox G to sprocket 44 and thence to the bending die spindle 40, whilst a hydraulic actuator H provides drive to sprocket 46 and thence to clamp arm 18.
  • Full closed-loop servo control for the motor is provided, a rotary position encoder E being coupled to the spindle and providing feedback to a motor control unit C.
  • the arrangement is that the torque available from the electric motor M (i.e.
  • 605- may be provided to the bending die from the electric motor and 405- to the clamp arm from the hydraulic actuator.
  • the electric motor is controlled to provide a braking effect towards the end of each bending movement, and finally to overcome the • drive to the clamp arm and stop both the bending die and the clamp arm at precisely the required position and in a smoothly controlled manner.
  • the hydraulic actuator is preferably also controlled so as to provide a reduced value of torque and/or speed to the clamp arm over a final portion of its movement both when bending and when ret- urning to its home position: for example the flow rate of hydraulic fluid to the hydraulic actuator over a line B may be reduced for these final portions of movement by a restrictor R.
  • the a.c. servo motor M provides drive to the bending die spindle as before, but drive to the clamp arm is provided by an electric motor M, which may be an a.c. or d.c. motor with servo-control, a rotary position encoder El being coupled to the clamp arm and providing feedback to a control unit C ] _ for the motor Ml.
  • the main drive for the bending operation is still provided by the a.c. servo-motor M, and the assisting drive is provided by the motor Ml: preferably the latter is used in a constant-torque mode during the bending operation and its servo-control mode is used for return- ing the clamp arm to its home position.
  • the clamp arm can be returned at high speed for most of its return movement, then slowed into its home position over the final portion of the return movement.
  • the numerical control system of the bending appa ⁇ ratus can respond when the bend arm has reached a prede ⁇ termined position close to its home position, to initiate movement of the carriage 24 to position the pipe ready for the next bending operation to be performed on that pipe.
  • the main drive is shown applied to the bending die and the assisting drive to the clamp arm, instead the main drive may be applied to the clamp arm and the assisting -drive to the bending die.
  • the clamp arm and bending die form a solid unit on which both drives act: but when the clamp is released, the clamp arm can be returned to its home position quicker if it receives the main drive, rather than the bending die.
  • the clamp arm has greater inertia then the bend ⁇ ing die.

Abstract

Une machine de cintrage de tuyaux comporte une matrice de cintrage (12), des moyens d'entraînement permettant de faire tourner la matrice de cintrage (12) autour de son axe lors d'une opération de cintrage, un bras (18) qui porte un dispositif (16) permettant de fixer le tuyau (1) sur la matrice de cintrage, et un organe d'entraînement séparé agissant sur le bras (18) du dispositif de fixation et servant à faire tourner ce bras autour de l'axe de cintrage simultanément avec la matrice de cintrage (12) en rotation lors de l'opération de cintrage.
PCT/GB1986/000378 1985-06-28 1986-06-27 Machine de cintrage de tuyaux WO1987000096A1 (fr)

Applications Claiming Priority (6)

Application Number Priority Date Filing Date Title
GB8516366 1985-06-28
GB858516366A GB8516366D0 (en) 1985-06-28 1985-06-28 Pipe bending machine
GB8519938 1985-08-08
GB858519938A GB8519938D0 (en) 1985-06-28 1985-08-08 Pipe bending machine
GB8528101 1985-11-14
GB858528101A GB8528101D0 (en) 1985-11-14 1985-11-14 Pipe bending machine

Publications (1)

Publication Number Publication Date
WO1987000096A1 true WO1987000096A1 (fr) 1987-01-15

Family

ID=27262717

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/GB1986/000378 WO1987000096A1 (fr) 1985-06-28 1986-06-27 Machine de cintrage de tuyaux

Country Status (2)

Country Link
EP (1) EP0227779A1 (fr)
WO (1) WO1987000096A1 (fr)

Cited By (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5054178A (en) * 1987-09-09 1991-10-08 Spuhl Ag Process and apparatus for the production of innersprings for mattresses and upholstered furniture
US5136867A (en) * 1987-09-09 1992-08-11 Spuhl Ag Automatic frame bending machine for bending of steel rods or band steel
WO1997037785A1 (fr) * 1996-04-10 1997-10-16 Robolix Machine a cintrer ou a cambrer un profile, et tete de cintrage pour une telle machine
WO2000021697A1 (fr) * 1998-10-14 2000-04-20 Rosenberger Automationstechnik Gmbh Procede permettant de couder des tuyaux
EP1380361A1 (fr) * 2002-07-13 2004-01-14 Trumpf Rohrtechnik GmbH + Co. KG Dispositif de cintrage avec outil de cintrage et entraínement de cintrage
US7082798B2 (en) 2002-07-13 2006-08-01 Trumpf Rohrtechnik Gmbh + Co. Kg Pipe bending machine
RU223619U1 (ru) * 2023-11-28 2024-02-26 Александр Геннадьевич Тестов Рабочий узел трубогиба

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2082949A (en) * 1980-09-04 1982-03-17 Schwarze Rigobert Pipe bending machine
FR2517995A1 (fr) * 1981-12-15 1983-06-17 Schwarze Rigobert Machine a cintrer les tubes, comportant une table de cintrage a mouvement pivotant

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2082949A (en) * 1980-09-04 1982-03-17 Schwarze Rigobert Pipe bending machine
FR2517995A1 (fr) * 1981-12-15 1983-06-17 Schwarze Rigobert Machine a cintrer les tubes, comportant une table de cintrage a mouvement pivotant

Cited By (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5054178A (en) * 1987-09-09 1991-10-08 Spuhl Ag Process and apparatus for the production of innersprings for mattresses and upholstered furniture
US5136867A (en) * 1987-09-09 1992-08-11 Spuhl Ag Automatic frame bending machine for bending of steel rods or band steel
WO1997037785A1 (fr) * 1996-04-10 1997-10-16 Robolix Machine a cintrer ou a cambrer un profile, et tete de cintrage pour une telle machine
FR2747328A1 (fr) * 1996-04-10 1997-10-17 Robolix Sa Machine a cintrer ou a cambrer un profile, et tete de cintrage pour une telle machine
US6134932A (en) * 1996-04-10 2000-10-24 Robolix Machine for bending or cambering a profile section, and bending head therefor
WO2000021697A1 (fr) * 1998-10-14 2000-04-20 Rosenberger Automationstechnik Gmbh Procede permettant de couder des tuyaux
EP1380361A1 (fr) * 2002-07-13 2004-01-14 Trumpf Rohrtechnik GmbH + Co. KG Dispositif de cintrage avec outil de cintrage et entraínement de cintrage
US7017380B2 (en) 2002-07-13 2006-03-28 Trumpf Rohrtechnik Gmbh &Co. Kg Bending assembly for bending machine
US7082798B2 (en) 2002-07-13 2006-08-01 Trumpf Rohrtechnik Gmbh + Co. Kg Pipe bending machine
RU223619U1 (ru) * 2023-11-28 2024-02-26 Александр Геннадьевич Тестов Рабочий узел трубогиба

Also Published As

Publication number Publication date
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