EP0120464A2 - Dispositif pour cintrer des tubes - Google Patents

Dispositif pour cintrer des tubes Download PDF

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Publication number
EP0120464A2
EP0120464A2 EP84103134A EP84103134A EP0120464A2 EP 0120464 A2 EP0120464 A2 EP 0120464A2 EP 84103134 A EP84103134 A EP 84103134A EP 84103134 A EP84103134 A EP 84103134A EP 0120464 A2 EP0120464 A2 EP 0120464A2
Authority
EP
European Patent Office
Prior art keywords
bending
head
tube
crank arm
roller
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
EP84103134A
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German (de)
English (en)
Other versions
EP0120464A3 (en
EP0120464B1 (fr
Inventor
Emmerich Gerstweiler
Original Assignee
EMMERICH GERSTWEILER Firma
GERSTWEILER EMMERICH FA
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Filing date
Publication date
Application filed by EMMERICH GERSTWEILER Firma, GERSTWEILER EMMERICH FA filed Critical EMMERICH GERSTWEILER Firma
Publication of EP0120464A2 publication Critical patent/EP0120464A2/fr
Publication of EP0120464A3 publication Critical patent/EP0120464A3/de
Application granted granted Critical
Publication of EP0120464B1 publication Critical patent/EP0120464B1/fr
Expired 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
    • 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

Definitions

  • the invention relates to a device for bending pipes, for example metallic brake lines, according to the preamble of claim 1.
  • motor vehicle brake lines are laid as close to the body floor as possible, they often have up to 20 different bends that run on different levels and can also be spatially curved.
  • the raw material is passed through a collet, similar to an automatic lathe, and clamped there for the respective section-wise processing.
  • a bending head is arranged in the vicinity of the collet, which produces the intended bending angle of, for example, 70 ° or 90 °, while the collet itself can be rotated about its longitudinal axis to adjust the bending plane.
  • a known from DE-OS 31 52 268 device of the type mentioned comprises on a main frame adjustable in all levels and attached to the respective bending points bending units.
  • each bending unit comprises a rotatably mounted guide roller and a bending roller which can be pivoted on a crank arm about the axis of the guide roller.
  • additional stops or counterholders are arranged in front of each bending unit, which have to be moved beforehand to clamp the rod to be bent. This requires a considerable amount of device parts, space and also manufacturing time.
  • the invention has for its object to improve a bending device of the type mentioned in such a way that precisely controlled bends can be made according to direction and angle at precisely predeterminable locations of an output material length and the workpiece quickly regardless of the number and extent of the bends to be made inserted into the device and can be removed from the device just as easily.
  • each bending unit between a retracted rest position and a working position lying in the bending plane of the associated bending point along an axis running through the center of bending and perpendicular to the bending plane in a guide frame connected to the main frame, and that in generally at a distance corresponding to the diameter of the pipe to be bent from the bending head, a bending holder is arranged, which is longitudinally displaceable together with the bending head.
  • a number of individual bending units corresponding to the number of bending points is set on a main frame, which is adapted approximately to the length and the spatial width of the finished workpiece resulting from the bends, in the manner of a modular system which can be enlarged or reduced as desired the bending units are each aligned with their main axis perpendicular to the center of the respective bending plane.
  • the manufacturing process begins with a first bending unit in its working position gripping the workpiece in the middle or at a suitable location between its ends, whereby it can be kept aligned on one side against an end stop in order to make the first bend.
  • the longitudinal stroke of the bending units between the rest position and the working position not only serves this simplified removal of the workpiece from the device, which is suitable for automatic production, but also the versatile adaptability of the devices workpieces with arbitrarily complicated bends, where otherwise fixed bending heads interfere with each other and to bending workpiece in the way.
  • the bend holder which is in a fixed relationship at least in the working position, ensures the production of a controlled bend at the desired point without the need for separate and separately driven counter-holding devices which, in the prior art, disadvantageously narrow the available space within the device. Because of these measures, workpieces with particularly close bends can be produced with the same device.
  • the bending unit provided for executing the first bend is arranged in such a way that it moves from bottom to top in its working position, the bend head and bend holder formed, here open at the top, for inserting the workpiece, for example a straight piece of pipe, so and using a simple one-sided end stop, it is extremely simply positioned so that the first and then all further bends immediately without additional stops, Fittings and the like can be carried out exactly over the desired angle and also at the desired location.
  • the construction of the device according to the invention enables it to be set exactly within a spatial coordinate system with its bending units, for example, without making a workpiece model, simply by means of a measurement protocol made at any time and at another location on a measuring machine. This makes it possible to use a single device to quickly switch to another production program after the end of a production program, since the setting operation requires only little time.
  • the bending head can sit at the front end of a holding shaft, on which a tubular sleeve carrying the crank arm with the bending roller is rotatably mounted, but is secured against relative axial displacements and is longitudinally displaceable and rotatable in a position device of the guide frame.
  • the respective bending unit is only advanced for gripping the workpiece when it has been bent in the required direction by the previous bending unit.
  • the optionally adjustable distance between the working and rest positions of the bending unit is sufficient in practically all cases to move the workpiece past the subsequent bending unit without hindrance.
  • the tubular sleeve is gripped at an external point of attack and, for example, gripped by a toggle lever including a length-adjustable articulated arm, so that the bending angle set on the articulated arm has been passed through by the bending roller after completion of the complete toggle lever stroke.
  • a toggle lever including a length-adjustable articulated arm
  • the practical design can be of any practical design, and instead of manual actuation levers pneumatic or hydraulic actuation cylinders can also be used, which act directly on the tubular sleeve or via the toggle lever connection. Equally, servomotors can also act on the holding shaft for longitudinal displacement.
  • a plurality of tubular sleeves are arranged concentrically one above the other, on said bending head adjacent the end of a crank arm are provided with a iegerolle in the bending plane reaching B, respectively, so that one after the other in opposite pipe bends of several times up to 180 ° can be produced.
  • the end face may be one obtained the bending head surrounding disk a flipped course with the desired pitch at which the bending roller the tube during manufacture of the bending angle is simultaneously provided with a bending slope in the manner of a spiral.
  • the holder 12 On a base plate, which is also part of a e.g. Main frame 10 assembled from tubular frame parts, individual holders 12 are fastened with screws 14 in the vicinity of the bends to be carried out according to FIG. 1.
  • the holder 12 has a ball joint receptacle 24 in which the ball head 20 of an intermediate piece 16 is held with suitable clamping means 22.
  • the intermediate piece 16 carries at its other end a ball head 20 which is received and tensioned in a ball joint receptacle 24 of a guide frame 26 of a bending unit after it has been aligned so that its longitudinal axis 70 runs through the center of the relevant bending point and at the same time perpendicularly on the Bending plane 72 stands.
  • a front bearing 28 and a rear bearing 30 are arranged concentrically to the longitudinal axis 70 on the guide frame 26.
  • a tube extends through the bearings 28, 30 sleeve 34, which carries a crank arm 36 near its front end, to which a bending roller 40 is attached at a distance from the longitudinal axis 70 on a holding axis 38.
  • the inner circumference of the tubular sleeve 34 is mounted on a holding shaft 32, the front end of which protrudes from the tubular sleeve 34 carries a bending head 42 and a disk 46 which is firmly connected to it.
  • the circumference of the cylindrical bending head 42, the end face of the disk 46 and the inside of the projecting bending holder 46 form a receptacle 44 in which a tube workpiece 76 is gripped and held when the holding shaft 32 is advanced, whereupon the crank arm 36 rotates with the bending roller 40 and thus the tube, starting from the bending holder 52, is bent to bear against the circumference of the bending head.
  • a driver lug 60 is seated, which rests on the rear end of the tubular sleeve 34, so that in the event of longitudinal displacements of the holding shaft 32, e.g. with the help of a fluid cylinder engaging at its rear end, the tubular sleeve 34 is also taken along.
  • a bolt or handle 62 is fastened to the driver projection 60 and protrudes through a longitudinal slot of a longitudinal guide 58, so that the holding shaft is secured against rotation.
  • a driver attachment 64 is also attached to the tube sleeve 34, from which a handle 66 extends in order to twist the tube sleeve 34 with respect to the holding shaft 32 in order to bend the tube 76 via the crank arm 36 and the bending roller 40.
  • the preferably removable and exchangeable bending head 42 is fastened to the front end of the holding shaft 32 by means of a screw 48 which is screwed into an end threaded bore of the holding shaft.
  • the so-called bending holder 52 can, as in the exemplary embodiment shown, start as a projection from a disk which is pushed onto the bending head and connected to it in a rotationally fixed manner by transverse reinforcement or by spline toothing.
  • the bending holder 52 and the circumference of the bending head 42 form a distance which is effective as a receptacle 44 for the pipeline to be bent.
  • the end face of the disk 50 can be designed as a spiral surface 54, as a result of which the tube accommodated in between when the bending head is advanced with a bending holder lies against the spiral surface 54 when it is pressed by the bending roller (not shown) to the left or clockwise around the circumference of the bending head 42 and up is bent to 180 °.
  • the helical surface 54 could also be progressively expanded in one direction up to an arc angle of approximately 300 ° if it is ensured that the bending roller is only ever moved by the crank arm in one direction of rotation.
  • tubular sleeves can be arranged and supported on the tubular sleeve 34, which may only be accommodated in the front bearing 28 and are each provided with an extension or hand lever on their circumference, while at their front end, similar to the sleeve 34 , carry a bending roller on a crank arm in order to be successively brought into engagement with the pipe to be bent if multiple bends are to be made that are 180 ° apart.
  • the standard version of the bending unit can in principle be the same for all bending stations, so that the bending units can be interchanged on the same main frame.
  • the interchangeability of the bending head 42 with the associated bending holder 52 serves the purpose of also being able to make curvatures with a different radius of curvature.
  • the bending rollers can be replaced by those with a smaller or larger diameter.
  • a guide frame 80 comprises a front section which supports the tubular sleeve 34 in a longitudinal bore designed as a slide bearing.
  • the guide frame is received and tensioned in a bore of a clamp holder 82, while the clamp holder in turn is fastened to a tube of the main frame by means of a clamping part 84 and clamped to the latter.
  • the crank arm 36 with the bending roller 40 mounted thereon is fastened to the front end of the tubular sleeve 34 in FIG. 4.
  • the holding shaft 32 is rotatably mounted within the tubular sleeve 34, on the front end of which the bending head 42 is fastened with the detachable or integrated bending holder 52. It can be seen that the bending head, the bending roller and the bending holder have tapered or conically tapered end sections, which when he advances the bending unit can grasp and grasp pipe work piece with greater certainty.
  • the rear end of the holding shaft 32 is fixedly connected to a driver projection 60, which acts as an axial limitation for the tubular sleeve 34 and extends with its lower end through a longitudinal slot 58 of a rear extension 86 of the guide frame 80.
  • a fluid cylinder 90 fastened to lugs 88 of the guide frame is connected with its piston rod to the driver lug 60 in order to advance the holding shaft and thus the entire bending unit into the working position when the fluid cylinder is loaded.
  • the movement can be effected by opposing action or by a return spring (not shown), possibly within the fluid cylinder.
  • a yoke part 94 is fastened, which extends over the driver shoulder 60 and carries on the opposite side in extension of the holding shaft 32 a shaft section 96 which has a parallel key or a spline toothing 98 and an inside with a complementary one Toothed sleeve 100 is coupled to a fluid rotary motor 102, which in turn is attached to the rear portion 86 of the guide frame.
  • the rotary motor 102 consequently provides the rotary movement of the tubular sleeve 34 with the bending roller 40 via the coupling described and the yoke part 94.
  • the longitudinal stroke of the bending units can, if necessary, be limited by stops, not shown. In the majority of all cases, a longitudinal stroke is sufficient, for example approx. 100 mm so that after the corresponding retraction movement from the working position, the bent tube workpiece can be removed from the device without problems or can fall downwards or to the side. 4, it is of course also possible in principle to attach further tube sleeves to the tube sleeve 34 and within a then enlarged bore of the guide frame 80, which tube sleeves are provided with additional bending rollers on correspondingly longer crank arms. The rotation of these additional bending rollers can take place manually or can be derived, for example, from the fluid motor 102 by means of a gear redirection.
EP84103134A 1983-03-22 1984-03-21 Dispositif pour cintrer des tubes Expired EP0120464B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE3310282 1983-03-22
DE3310282 1983-03-22

Publications (3)

Publication Number Publication Date
EP0120464A2 true EP0120464A2 (fr) 1984-10-03
EP0120464A3 EP0120464A3 (en) 1985-01-16
EP0120464B1 EP0120464B1 (fr) 1986-07-09

Family

ID=6194244

Family Applications (1)

Application Number Title Priority Date Filing Date
EP84103134A Expired EP0120464B1 (fr) 1983-03-22 1984-03-21 Dispositif pour cintrer des tubes

Country Status (2)

Country Link
EP (1) EP0120464B1 (fr)
DE (1) DE3460276D1 (fr)

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2366012A (en) * 1942-10-20 1944-12-26 Parnall Aircraft Ltd Appliance for bending tubes, rods, and the like
US2827101A (en) * 1954-10-04 1958-03-18 Northrop Aircraft Inc Pivoted tube bender with tube positioning mark and adjustable tube locating device
US3126773A (en) * 1964-03-31 taylor
DE1527394A1 (de) * 1963-06-14 1969-12-18 Claude Ragache Universalbiegemaschine

Family Cites Families (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
NO146420C (no) * 1980-08-26 1983-10-05 Hans Slettvoll Boeyeapparat for manillastenger i alle plan

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3126773A (en) * 1964-03-31 taylor
US2366012A (en) * 1942-10-20 1944-12-26 Parnall Aircraft Ltd Appliance for bending tubes, rods, and the like
US2827101A (en) * 1954-10-04 1958-03-18 Northrop Aircraft Inc Pivoted tube bender with tube positioning mark and adjustable tube locating device
DE1527394A1 (de) * 1963-06-14 1969-12-18 Claude Ragache Universalbiegemaschine

Also Published As

Publication number Publication date
EP0120464A3 (en) 1985-01-16
DE3460276D1 (en) 1986-08-14
EP0120464B1 (fr) 1986-07-09

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