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EP0120336B2 - Machine à cintrer les tubes - Google Patents
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EP0120336B2 - Machine à cintrer les tubes - Google Patents

Machine à cintrer les tubes Download PDF

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Publication number
EP0120336B2
EP0120336B2 EP84102164A EP84102164A EP0120336B2 EP 0120336 B2 EP0120336 B2 EP 0120336B2 EP 84102164 A EP84102164 A EP 84102164A EP 84102164 A EP84102164 A EP 84102164A EP 0120336 B2 EP0120336 B2 EP 0120336B2
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EP
European Patent Office
Prior art keywords
clamping
bending
bending template
template
piston
Prior art date
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Expired - Lifetime
Application number
EP84102164A
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German (de)
English (en)
Other versions
EP0120336A1 (fr
EP0120336B1 (fr
Inventor
Rigobert Dipl.-Ing. Schwarze
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Individual
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Individual
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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
    • B21D37/00—Tools as parts of machines covered by this subclass
    • B21D37/14—Particular arrangements for handling and holding in place complete dies
    • 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
    • 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

Definitions

  • the invention relates to a pipe bending machine.
  • the clamping jaws and counter-clamping jaws are changed mechanically in order to bend tubes with different designs with a single clamping in the clamping sleeve on the feed carriage of the bending template and thus without removing and converting the clamping jaws.
  • the bending template and the clamping jaw each have a rectilinear groove and one or more curved grooves corresponding to the tube radius and the bending template and the clamping jaw are rotatably mounted on the bending table.
  • a known pipe bending machine (DE-A-2 711 340) of the type specified in the preamble of claim 1 each has a clamping body which is guided on the bending template and on the clamping device so as to be displaceable in the vertical direction.
  • Each clamping body is provided with a plurality of clamping surfaces arranged one above the other, which interact with the clamping surfaces of the opposite clamping body.
  • the desired pair of clamping surfaces can be adjusted to the height of the circumferential groove of the bending template.
  • the remaining clamping surfaces are then below the circumferential groove of the bending template. Since between the circumferential groove and the bending table carrying the bending template there must be a corresponding free space for the clamping surfaces of the clamping bodies lying below the circumferential groove, a relatively large overall height of the bending template is required.
  • the bending template should be as flat as possible so that the circumferential groove of the bending template is arranged directly above the bending table in order to keep the bending stress on the drive shaft of the bending template low.
  • the clamping body, the range of movement is not limited to the space above the circumferential groove, can hinder the freedom of movement of the tube during the bending or loading process.
  • the invention has for its object to provide a pipe bending machine in which the bending template has a low profile and can be provided with a variety of clamping surfaces of different designs.
  • the solution according to the invention ensures that the body with the clamping surface is present on the bending template and in the same way also on the clamping jaw only at one point, which is generally also a recess.
  • This measure of mechanically arranging bodies with different clamping surfaces at a single point on the bending template and / or the clamping jaw ensures that the production of the bending template is simplified.
  • the bending template can also be used over a larger area of its circumference. It is also essential that other components may be present on the bending template or in cooperation with the bending template, which simplify the manufacture of the tube or lead to a safe tube production.
  • a so-called wrinkle smoothener can now be arranged in the vicinity of the bending template and interacting with the bending template, which is at the level of the slide rail.
  • the tube can be thickened at its front end so that it can be connected to another tube or other body after bending.
  • the tube can also be provided, for example, with a welded-on flange or other connecting body. In many cases it is common first to bend the pipes and then to attach these connecting bodies to the front pipe end.
  • connection bodies With the solution according to the invention, it is now easily possible to bring these connection bodies to the unbent pipe before it is introduced into the pipe bending machine. As a result, the attachment of the connecting bodies, usually by welding or soldering, can be simplified very mechanically in the case of straight pipes.
  • the solution according to the invention of arranging a large number of the bodies, each with different clamping surfaces, one after the other at a predetermined point on the bending template, is a great relief.
  • the solution according to the invention allows various possibilities that can be easily adapted to the local conditions, the special design of a pipe-making machine, the size of the bending template and the number of different clamping surfaces required.
  • the solution according to the invention can also be expanded in the manner of a modular system. Two or three, but also optionally four or five such bodies with assigned clamping surfaces can be used, or the clamping surfaces can also be removed from the machine and exchanged for others, provided that individual pipes or a series of pipes have different dimensions, for example their outer pipe diameter .
  • a piston rod is fastened to the bending template and / or the clamping jaw in vertical extension and on the cylinder assigned to the piston rod an axis of rotation for a shaft extending in a horizontal plane is arranged, at one end of which the two are side by side lying jaws are arranged with the clamping surfaces, the aforementioned shaft being rotatable by an associated motor, in particular a hydraulic motor, so that after a corresponding rotation of the shaft and the movement of the cylinder on the piston rod, one body or the other body into the recess of the bending template can be brought in and arranged in the working position there.
  • This solution thus means that in addition to the movement in the vertical direction, there is a movement transversely thereto.
  • This transverse movement is a rotary movement in the case described above. As will be explained below, it can also be a movement in the horizontal plane.
  • the rotary movement which is used hastily for two bodies with assigned different clamping surfaces, wherein these two bodies can also be a single body that has two different clamping surfaces, is particularly simple and takes up little space. So the space that the device occupies is limited to a space above the bending template, so that this solution does not interfere with the bending of the pipes.
  • the solution to attaching the piston rod to the bending template or the clamping jaw can also be modified in a further embodiment according to the invention in such a way that a hydraulic cylinder is attached to the bending template and / or the clamping jaw in vertical extension, the piston rod of which is at the upper end has a horizontal pivot bearing for a swivel arm, which has the body with one clamping surface at one end and the body with the other clamping surface at the other end and by rotating the two bodies about the horizontal axis of rotation and raising and lowering the piston rod and thus the Swivel arm of one or the other body can be introduced into the recess of the bending template and is arranged there in the working position.
  • This solution takes up only one space above the bending template. The space can be reduced by the requirement that a horizontal boom is arranged at the upper end of the piston rod, which has a downward extension at its front end and the horizontal axis of rotation is arranged in the region of the lower end of this extension.
  • a cantilever arm is mounted on the upwardly extended axis of rotation of the bending template, each of which carries a rail at its two ends, the other end of which are carried by a bracket on the bending table and a carriage can be moved on these two rails, furthermore the carriage which is movable in this way is provided with a guide on which at least two cylinders arranged one behind the other in the radial direction of the bending template can be moved, the downward-pointing piston rods of which the bodies coexist wear the clamping surfaces.
  • a guide in the recess of the bending template and the body on one of the surfaces lying against one another in the use position advantageously in the form of a tongue and groove design.
  • This guide can be in one of the adjacent surfaces. However, it can also be present in a further contact surface.
  • a particularly advantageous embodiment of the invention is that above the bending template and coaxially to its axis of rotation and relative to the bending template in the same horizontal plane rotatable a support device is advantageously arranged in the form of a carrier plate, on the circumference or area of the circumference, a plurality of clamping bodies are attached and these clamping bodies are displaceable from the carrier plate into the recess of the bending template.
  • This solution has the advantage that a large number of clamping bodies of different designs can be arranged distributed over the circumference of the support device or support plate.
  • the aforementioned basic proposal to arrange the clamping bodies rotatably above the bending template and coaxially relative to the bending template allows various further developments for the movement of the clamping bodies.
  • One suggestion is to provide a hydraulically or pneumatically operated piston-cylinder arrangement on the carrier plate, which introduces and executes at least one of the clamping bodies into the recess in the bending template.
  • This proposal thus implies that a plurality of clamping bodies can be assigned a single piston-cylinder arrangement which lifts a clamping body out of the bending template and then lifts or fastens it to the carrier plate, this same piston-cylinder arrangement subsequently having previously been rotated Carrier plate and corresponding positioning of the next clamping body to be used above the recess of the bending template in this recess from above.
  • the solution is particularly advantageous. that a hydraulic or pneumatic piston-cylinder arrangement is arranged on the carrier plate associated with each clamping body. This solution is advantageous because the piston rod is permanently connected to the clamping body and thus a safe and quick lifting and lowering of the clamping body can take place.
  • the carrier plate in addition to the aforementioned rotation of the carrier plate coaxial to the bending template, the carrier plate can also be displaced in the radial direction parallel to the bending template.
  • the carrier plate with the clamping bodies located thereon can be used for bending templates of different diameters with comparatively simple means.
  • This solution also ensures that the support plate can be retrofitted to existing pipe bending machines with the clamping bodies movably arranged on them as an independent device.
  • the carrier plate can be displaced in the radial direction of the bending template in such a way that a piston-cylinder arrangement for displacing the carrier plate in the radial direction relative to the bending template is present in the area between the top of the bending template and the carrier plate.
  • the carrier plate is mounted displaceably in the axial direction to the bending template.
  • This proposal ensures that the carrier plate with the clamping bodies mounted thereon can also be used for a so-called tier template, in which a further bending template of smaller diameter is placed on a lower bending template of large diameter.
  • This axial displacement of the entire carrier plate can be achieved in a simple manner in that a piston-cylinder arrangement for lifting the carrier plate is arranged on the upper side of the bending template.
  • the Carrier plate consists of a U-shaped pot, which has a very wide circumferential flange and openings are provided on the circumference of the flange, reach through the piston rods, the pistons of which are arranged in cylinders above the carrier plate or the flange, and the lower ends of the Piston rods are each connected to an associated clamp body.
  • FIG. 1 shows a conventional pipe bending machine with a feed carriage 10, which can slide back and forth on one or more guide rails 11 on the top of the machine housing 12.
  • the feed carriage 10 has a hollow cylinder 13, in the interior of which there is a clamping sleeve 14 in which the end region of the pipe section or pipe 15 to be bent is clamped.
  • the pipe section 15 is guided around a pivotally mounted bending template 16 which has a groove 17 for the pipe which corresponds to the pipe radius.
  • a clamping jaw 19 is pressed by means of a clamping device 18, which also has a groove corresponding to the pipe radius as a clamping surface and clamps the pipe 15 on the bending template 16.
  • a hydraulic cylinder 20 is shown as an example, which moves the clamping device 18 of the clamping jaw 19 towards the bending template 16 for clamping the pipe or removes it from this template.
  • the bending template 16 is fixedly arranged on the bending table 21, while the clamping device 18 can be pushed back and forth in the indicated arrow direction 22 via the cylinder 20 shown as an example. If the bending template 16 is pivoted over the bending table 21 together with the clamping jaw 19 in the direction of the arrow 23, the pipe section 15 is given a curvature which corresponds to the profile of the bending template 16. During this bending process, the end part of the pipe section 15 remains clamped in the clamping sleeve 14 of the feed carriage 10 in order to safely guide the pipe section in all positions.
  • a slide rail 24 is pressed onto this pipe section part, which also has a groove which corresponds to the pipe radius.
  • the clamping sleeve 14 of the feed carriage 10 not only clamps the pipe section 15 firmly. but also turns it up to 360 ° if successive pipe bends are to be bent in different directions.
  • a hydraulic motor rotates a worm which interacts with a worm wheel (not shown) which is connected to the clamping sleeve 14.
  • Fig. 2 shows an exhaust pipe that can be produced with the bending machine and in which bent sections or pipe bends S 1 and S 2 as well as S 3 and S 4 directly follow. There are also linear intermediate lengths L 1, L 2 and L 3, which, however, do not need to be present except for the length L 1.
  • Fig. 2 thus shows a tube in which there are partially straight intermediate lengths between bends and partially straight intermediate lengths between bends are not available.
  • This tube shown in Fig. 2 can be bent with a single relaxation on the tube bending machine the. An example of such a machine is shown in FIG.
  • the bending table 21 is rotatable about the axis 25.
  • This has a lower shaft 26, in which a shaft 27 is arranged coaxially, which in its upper area has a part 28 with an enlarged diameter on which the bending template rests.
  • the bending template 16 is mounted on a shaft 29 and is secured against rotation in connection with a wedge, not shown, on the latter. With 30 a clamping device is designated.
  • the clamping jaw 19 is an exchangeable body and has a clamping surface 19a. On the bending template 16 there is a body 31 which has a clamping surface 31a which lies opposite the clamping surface 19a of the clamping jaw 19.
  • the bending table of the bending template and the clamping jaw is rotated via a chain 32.
  • the clamping device 18 with the clamping jaw 19 is moved back and forth in the indicated double arrow direction 22 by the piston rod 33 of the cylinder 20, which is fixed in place on the bending table 21 via the shaft 34 and is provided with a toggle lock 35 and 36.
  • Figures 4 and 5 show a solution in which the bending template has the usual height and is located just above the bending table. This can be achieved by the proviso that there is also a piston rod 38 on the bending template, namely on the upper side 47, which is provided with a piston 46 which is movable in the cylinder 39.
  • the outer surface of the cylinder 39 is over a holder 48 is provided for the shaft 49, on the front area of which there is a body 51 with a curved clamping surface 51a a and another body 52 with a straight clamping surface 52a via a fastening plate 50.
  • Fig. 5 shows that after rotating the shaft 49 by 180 °, the body 51 with the curved clamping surface assumes the lower position and was then introduced into the recess 54 of the bending template 16.
  • the recess has the two surfaces 55 and 56.
  • a protruding rounded strip 57 In the surface 55 there is a protruding rounded strip 57.
  • a rounded groove 58b is provided on the contact surface 58 of the body 51, but also in the same way on the body 52.
  • a projecting bar 57 can also be assigned to the surface 56 of the beige template 16. There is therefore a vertical guide in the manner of a tongue and groove, which increases the flat contact of the body in the recess 54.
  • Fig. 6 shows that the top 47 of the bending template 16 is screwed onto a cylinder 59, the piston rod 60 of which has a transversely projecting arm 61 with a horizontal pivot bearing 62 and a swivel arm 63, which has the body 51 at one end and the other at the other Body has 52.
  • the arm 62 is rotated by a hydraulic motor 64.
  • FIG. 7 shows that the piston rod 60 is extended before the rotation about the horizontal axis 62.
  • Fig. 8 shows that two cylinders 59 and 59a with associated arms 61, 61 a are present on the piston rods 60.
  • the hydraulic motor 64 and the arm 61 with the body 51 in the working position are also shown.
  • Fig. 9 shows that the arm 60 attached to the piston rod has an arm 65 which is angled downwards and on which the aforementioned axis of rotation 62 is arranged. This solution results in a significantly lower overall height. 9, the piston rod 60 is extended and thus the body 61 is extended from the recess of the bending template 16. Then the rotation takes place through 180 °, which can take place in one direction or the other.
  • Fig. 10 shows a side view and partly in section a particularly advantageous solution because it allows more than two bodies with associated clamping surfaces.
  • the rail 65 extends in a horizontal plane and is supported at the other end on a bracket 66 which is supported on the bending table 21.
  • a plurality of cylinders 67, 68, 69 and 70 are movable on the rail 65, which are provided with associated piston rods and carry bodies 71 and 72 for use in the bending template 16, and 19, 19b for use on the tensioning device 18.
  • the aforementioned cylinders are connected to one another by a holder 73 to which the piston rod 75 is articulated via a connecting plate 74, the piston 76 of which can be moved in the hydraulic cylinder 77, the cylinder 77 also being fastened to the bracket 66.
  • Fig. 10 shows the position that the body 72 can be moved into the bending template 16 and the body 19 in the clamping device 18.
  • the narrowed state results from FIG. 11 because the piston rods of the cylinders 68 and 69 are extended.
  • Fig. 13 shows the development of the solution shown in Fig. 10 with the proviso that at the head end of the shaft 29 as the axis of rotation of the bending table 21 is arranged with the bending template, a crossbar 78 which carries a rail 65 at one end and a rail 65a at the other end, which are fastened to the bracket 66 as described in relation to FIG. 10.
  • a carriage 79 can be moved on the above-mentioned rails 65, 65a via four slide bearings 78a, 78b 78c and 78d, specifically via the cylinder 20 attached to the bracket 66 (shown in principle in FIG. 1), the piston rod of which on a crossbar 80 of the carriage 79 is fastened so that the clamping jaw is pressed against the bending template 16 with the interposition of the tube.
  • the carriage 79 has a further crossbar 81, on which two rails 82 and 82a are fastened, which carry a further carriage 84 via four slide bearings 83, on which the cylinders 69 and 70 according to FIG. 10 are arranged, the associated piston rods of which are the bodies with clamping surfaces wear, which are attached to the clamping device 18 and thus form the jaws 19 and 19a.
  • the movement in the horizontal plane takes place through the cylinder 77 described in FIG. 10, the piston rod 76 of which is connected to the carriage 84.
  • hydraulic cylinder with piston rod shown in FIG. 13 can also be the piston cylinder 20 shown in FIG. 3 with the piston rod 33, which moves the tensioning device 18 towards the bending template and away from it via a toggle lever lock.
  • 14 shows the bodies 19 and 19b with their associated clamping surfaces of different spatial shapes.
  • the cylinders 69 and 70 are attached to the carriage 84, which is movable with its bearings 83, 83a on the rail 82 and is connected to the carriage 84 via the piston 77 with the piston rod 76.
  • 14 also shows the rail 65 fastened to the shaft 29, the rails 82 and 82a and the carriage 84 which can be moved in the manner described above by the cylinder 77 with its piston 76.
  • the carriage 79 is also actuated via the tensioning cylinder 20, so that because this first acts on the tensioning device, the body 19 with its associated clamping surface or the body 19a with its associated clamping surface is displaced with the force required for bending in the direction of the bending template, and that Tube clamped to the bending template.
  • Figure 15 shows the bending template 16 as viewed from above.
  • the square support plate 85 which is assigned to each side and has clamping bodies 86, 86a, 86b and 86c, is arranged above this.
  • the carrier plate has guides 87 associated with a wedge 57a for holding the aforementioned clamping bodies in FIG. 16, as is also shown as wedge 57 in FIG. 4.
  • 16 shows the recess 54 in the bending template 16, in which the wedge 57 is also present as an extension of the aforementioned wedge 57a.
  • the bending template 16 is rotated together with the bending table 21 via the shaft 26, as has been described in detail for FIG. 3.
  • the carrier plate is attached to the upper end of the drive shaft 26.
  • the rotation of the carrier plate about the axis 26 of the bending template is carried out by a hydraulic motor 87.
  • the carrier plate has an associated rotary drive which rotates it about the axis of the bending template, so that the clamping bodies 86a, 86b or 86c one after the other into one position get above the recess 54 of the bending template and then be moved down into this recess.
  • the solution shown in FIG. 17 is particularly advantageous in that a piston-cylinder arrangement 93, 93a, 93b and 93c is associated with each clamping body 86, 86a, 86b and 86c.
  • This solution has the advantage that the previously mentioned clamping bodies always remain attached to the rod 91 and this attachment is also the holder on the carrier plate. This enables a quick change of the sprags.
  • the carrier plate as soon as its clamping bodies are all raised, is rotated by a shaft 94 arranged within the drive shaft 26 of the bending template with a ring gear 95, on which a drive chain of a rotary motor, not shown in the drawing, engages.
  • the support plate 85 of the embodiment according to FIGS. 17 and 18 has an associated rotary motor on the support plate 85 which rotates it relative to the bending template, so that one or the other of the aforementioned clamping bodies into the position above the recess 54 of the bending template reached.
  • a rotary motor can be a hydraulic motor.
  • An electric motor is also possible.
  • the solution of arranging the drives for attaching and lowering the clamping bodies and rotating the support plate on the support plate is advantageous because this solution enables a tube bending machine to be subsequently fitted with this solution above the bending template.
  • Fig. 19 is the solution that the carrier plate is radially displaceable to the bending template.
  • a guide 96 extending in the radial direction is provided above the bending template 16.
  • the rotary drive is arranged on the carrier plate 85, as mentioned above, it can also be attached directly to the upper side of the bending template 16.
  • the carriage 97 is displaceable on the rail 96. This is done by a bracket 98 on the rail 96 attached cylinder 99, the piston rod 100 is attached to a bracket 101 of the carriage 87.
  • the support plate 85 is designed in the manner of a pot. It has the wide circumferential flange 102 on which the piston-cylinder arrangements 93, 93a, 93b and 93c are arranged, and, as described in relation to FIG. 16, a clamping body 86 is fastened to an associated piston rod 91.
  • the piston rod 104 of the cylinder 105 is attached to the underside of the pot 102 and raises and lowers the entire support plate 85.
  • Fig. 19 shows the raised position of the support plate with the proviso that the aforementioned clamping bodies 86, 86a, etc. are fitted with the upper bending template 16 by the hydraulic cylinders 93 assigned to them with the piston rods 91. However, if, as shown in Fig.
  • the lower bending template 16a which has a larger diameter, is to be fitted with the clamping body, then the piston rod 104 is inserted and the support plate 85 is lowered accordingly, with the proviso that the clamping body 86 when the piston rod is extended 91 can be moved into the recess 54a of the lower bending template 16a.
  • the radial displacement necessary as a result of the larger diameter of the lower bending template 16a is brought about by the piston-cylinder arrangement 99, 100.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Bending Of Plates, Rods, And Pipes (AREA)

Claims (16)

1. Cintreuse pour tubes présentant un chariot (10) transportant le tube et une table de cintrage pouvant être orientée (21) autour d'un axe, un gabarit de cintrage (16) et un dispositif de tension (18) lui faisant face et pouvant se déplacer par un mouvement d'aller et retour entraîné par le gabarit ; ledit gabarit de cintrage (16) est muni d'une mâchoire de serrage et le dispositif de tension (18) d'une contre-mâchoire de serrage, conçue pour les coupes de tube à étirer et permettant à leur tour à des surfaces de serrage conjuguées entre elles et séparées l'une de l'autre et d'être placées en position de travail; Sur le gabarit de cintrage (16) et/ou le dispositif de tension (18) il est prévu une surface d'appui, en particulier représentée par un évidement (54) pour le logement interchangeable de la mâchoire de serrage ou de la contre-mâchoire de serrage en alignement avec une rainure de cintrage (17) ; la mâchoire de serrage du gabarit de cintrage (16) est équipée d'un moteurà piston etcylin- dre, fixé au gabarit de cintrage et/ou la contre-mâchoire de serrage du dispositif de tension (18) est équipée d'un moteur à piston et cylindre qui est fixé au dispositif de tension, et le gabarit de cintrage (16) comportant la mâchoire de serrage ou le dispositif de tension (18) comportant la contre-mâchoire de serrage, étant muni d'une glissière de guidage ; et, à son tour, le moteur à piston et cylindre qui est associé à la mâchoire de serrage ou à la contre-mâchoire, pénètre dans le logement (54) ou en sort en un mouvement vertical et, à la place d'une mâchoire ou contre-mâchoire de serrage, il est possible de disposer une autre mâchoire ou contre-mâchoire d'une autre forme en alignement avec la rainure de cintrage, caractérisé par le fait que les mâchoires de serrage (51,52) peuvent osciller autour d'un axe de rotation horizontal au dessus du gabarit de cintrage (16) ou du dispositif de tension, ou que lesdites mâchoires sont appliquées à un dispositif support mobile horizontalement et par le fait que le moteur à piston et cylindre fait sortir une mâchoire de serrage hors du logement et que le dispositif support déplace cette mâchoire de serrage, à l'état soulevé, par un mouvement d'oscillation ou par un mouvement horizontal et la remplace par une autre mâchoire de serrage qui est ensuite amenée dans ledit logement
2. Cintreuse pour tubes selon la revendication 1, caractérisée par le fait que l'axe de rotation du dispositif support est constitué par un arbre (49) s'étendant dans un plan horizontal et associé au cylindre (39) du moteur à piston et cylindre, et que, à une extrémité de cet arbre sont disposées les mâchoires de serrage (51,52) reliées entre elles et situées l'une à côté de l'autre avec les surfaces de serrage (51 a, 52a), permettant ainsi à l'arbre (49) par l'intermédiaire d'un moteur (53a) qui lui est associé, en particulier un hydromoteur, de tourner de telle manière qu'après la rotation correspondante de l'arbre (49) et le mouvement du cylindre (39) dans la tige du piston (38) l'une des mâchoires de serrage (51) ou l'autre mâchoire de serrage (52) peut être dirigée dans le logement 54 du gabarit de cintrage (16) et y être placée en position de travail.
3. Cintreuse pour tubes selon la revendication 1, caractérisée par le fait qu'un cylindre hydraulique (59) du moteur à piston et cylindre est fixé au gabarit de cintrage (16) et/ou au dispositif de tension (18) en s'étendant verticalement ; que la tige du piston (60) dudit cylindre hydraulique présente à l'extrémité supérieure l'axe de rotation horizontal (62) pour un bras oscillant (63), lequel présente à une extrémité une première mâchoire de serrage (51) comportant une surface de serrage (51a) et à l'autre extrémité, une deuxième mâchoire de serrage (52) comportant l'autre surface de serrage (52a) et que par la rotation des deux mâchoires de serrage (51,52) autour de l'axe de rotation horizontal (62) et par le soulèvement et la descente de la tige du piston (60) et par là, du bras oscillant (63), la première ou la seconde mâchoire de serrage est amenée dans le logement (54) du gabarit de cintrage et y est placée en position de travail.
4. Cintreuse pour tubes selon la revendication 3, caractérisée par le fait que, à l'extrémité supérieure de la tige de piston (60), est disposé un avant-bras ou flèche (61) qui, à son extrémité avant, présente un prolongement (65) et que dans la région d'extrémité inférieure, dans ce prolongement, est adapté l'axe de rotation horizontal (62).
5. Cintreuse pour tubes selon la revendication 1, caractérisée par le fait que, dans la région au dessus du gabarit de cintrage (16) et/ou du dispositif de tension (18) est disposé un rail horizontal (65) au moyen de plusieurs cylindres hydrauliques (67,68,69,70) pour le soulèvement et la descente des mâchoires de serrage (71,72) peuvent être positionnés, chaque cylindre dans l'extension verticale vers le bas de sa tige de piston ayant une mâchoire de serrage (19, 19b, 71, 72) avec sa surface de serrage et que, par un mouvement s'étendant dans le sens horizontal et dans le sens vertical, elle peut, si on le désire, introduire une des mâchoires de serrage avec sa surface de serrage ou l'autre mâchoire de serrage avec son autre surface de serrage dans le logement (54) du gabarit de cintrage (16) ou du dispositif de tension et les y placer en position de travail.
6. Cintreuse pour tubes selon la revendication 5, caractérisée par le fait que l'axe de rotation (29) du gabarit de cintrage (16) se prolonge vers le haut en dehors du gabarit de cintrage et qu'à l'extrémité supérieure de ce prolongement est disposé le rail (65) s'étendant horizontalement qui est logé contre une butée (66) de la table de cintrage et qu'une bride de support (73) peut être disposée sur ce rail (65) et que sur la bride en direction radiale du gabarit de cintrage, sont disposés les uns après les autres les cylindres hydrauliques (67, 68, 69, 70) dont les tiges de piston dirigées vers le bas portent chacune à leur extrémité avant inférieure une mâchoire de serrage (71,72,19b,19) avec sa surface de serrage et que par le déplacement des mâchoires de serrage dans le plan horizontal et par le soulèvement et la descente dans un plan vertical, l'une ou l'autre mâchoire de serrage peut être introduite dans le logement (54) du gabarit de cintrage (16) ou du dispositif de tension (18) et s'y disposer en position de travail.
7. Cintreuse pour tubes selon la revendication 6, caractérisée par le fait que sur l'axe de rotation prolongé vers le haut (29) du gabarit de cintrage (16) est logée une traverse qui supporte à ses deux extrémités à chaque fois un rail (65, 65a) et l'autre extrémité est su pportée par la butée (66) sur la table de cintrage (21), et que sur ces deux rails (65, 65a), un chariot (80,81) peut se déplacer, de sorte que le chariot ainsi mobile est muni d'une glissière de guidage (82, 82a) et qu'au moins deux cylindres (69,70) disposés dans la direction radiale du gabarit de cintrage peuvent s'y déplacer, l'un derrière l'autre, leurs tiges de piston dirigées vers le bas portant les mâchoires de serrage (19, 19b) avec les surfaces de serrage.
8. Cintreuse pour tubes selon l'une des revendications de 1 à 7, caractérisée par le fait que, dans le logement (54) du gabarit de cintrage (16) et sur les mâchoires de serrage (51,52) dans l'une des positions de travail des surfaces d'une des surfaces adjacentes (55,58), est disposée une glissière de guidage (7,59) ayant la forme d'une configuration à languette et rainure.
9. Cintreuse pour tubes selon la revendication 1 caractérisée par le fait qu'en amont du gabarit de cintrage (16) et co-axialement à son axe de rotation (26) et par rapport au gabarit de cintrage, dans le même plan horizontal, est disposé, en pouvant tourner le dispositif de support, réalisé avantageusement sous la forme d'une plaque porteuse (85) et que, dans la zone de son périmètre de multiples mâchoires de serrage (86,86a, etc...) sont appliquées, ces mâchoires de serrage pouvant être glissées par la plaque porteuse dans le logement (54) du gabarit de cintrage (16).
10. Cintreuse pourtubes selon la revendication 9, caractérisée par le fait que sur la plaque porteuse (85) est situé un dispositif à piston-cylindre (88,89,90,91) actionné hydrauliquement ou pneumatiquement, qui introduit et fait sortir au moins une des mâchoires de serrage (86) dans le logement du gabarit de cintrage.
11. Cintreuse pour tubes selon la revendication 9, caractérisée par le fait qu'il est prévu sur la plaque porteuse (85) pour chaque mâchoire de serrage un dispositif piston-cylindre hydraulique ou pneumatique.
12. Cintreuse pour tubes selon la revendication 9, caractérisée par le fait que la plaque porteuse (85) peut être déplacée parallèlement au gabarit de cintrage (16) et en direction radiale par rapport à celui-ci.
13. Cintreuse pour tubes selon la revendication 12, caractérisée par le fait que, dans la zone entre le côté supérieur du gabarit de cintrage (16) et la plaque porteuse (85), il est prévu un dispositif piston-cylindre (99,100) pour le déplacement de la plaque porteuse (85) en direction radiale par rapport au gabarit de cintrage ou contre ledit gabarit de cintrage (16).
14. Cintreuse pour tubes selon la revendication 9 et l'une ou plusieurs des revendications 10 à 13, caractérisée par le fait que la plaque porteuse (85) peut être déplacée en direction axiale par rapport au gabarit de cintrage.
15. Cintreuse pour tubes selon la revendication 14, caractérisée par le fait qu'au côté supérieur du gabarit de cintrage (16), est adapté un dispositif piston-cylindre (104,105) pour le soulèvement de la plaque porteuse (85).
16. Cintreuse pour tubes selon la revendication 15, caractérisée par le fait que la plaque porteuse (85) est constituée d'un boisseau en forme de "U" (102) qui présente un flasque circulaire très large (103) et que sur le périmètre de ladite flasque sont prévues des ouvertures, au travers desquelles pénètrent les tiges de piston (91), dont le piston est disposé dans le cylindre (93) au-dessus de la plaque porteuse ou du flasque (103) et que les extrémités inférieures des tiges de piston (91) sont reliées chacune à une mâchoire de serrage correspondante.
EP84102164A 1983-03-26 1984-03-01 Machine à cintrer les tubes Expired - Lifetime EP0120336B2 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE3311148 1983-03-26
DE3311148 1983-03-26

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EP0120336A1 EP0120336A1 (fr) 1984-10-03
EP0120336B1 EP0120336B1 (fr) 1988-06-08
EP0120336B2 true EP0120336B2 (fr) 1991-10-09

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US (1) US4567745A (fr)
EP (1) EP0120336B2 (fr)
CA (1) CA1211032A (fr)
DE (1) DE3471892D1 (fr)

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US11440069B2 (en) 2013-11-15 2022-09-13 Greenlee Tools, Inc. Bender having a sensor configured to sense a workpiece

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GB8519627D0 (en) * 1985-08-05 1985-09-11 Integrated Production Machines Pipe bending machine
FR2624038A1 (fr) * 1987-12-02 1989-06-09 Snecma Outillage de cintrage de canalisations et procede de fabrication d'une canalisation a embout soude
DE19530805A1 (de) * 1995-08-22 1997-02-27 Schwarze Rigobert CNC-gesteuerte Rohrbiegemaschine
FR2774317B1 (fr) * 1998-01-30 2000-04-07 Silfax Machine a cintrer les tubes et son dispositif a barillet
FR2783447B1 (fr) 1998-09-22 2000-12-01 Silfax Dispositif prehenseur pour le changement des outils de cintrage sur une machine a cintrer les tubes
US10150154B2 (en) 2013-11-14 2018-12-11 Robert Kyle Hughes, JR. Tube bending machine with reversible clamp assembly
ITUA20161931A1 (it) * 2016-03-23 2017-09-23 Crippa Spa Dispositivo per la curvatura di un materiale filiforme
CN112496107B (zh) * 2020-11-28 2022-03-22 青岛船用锅炉厂有限公司 一种锅炉蛇形管弯曲成型加工系统
IT202000030371A1 (it) * 2020-12-10 2022-06-10 Cte Sistemi Srl Procedimento per ricavare una curva tridimensionale in un prodotto tubolare, e procedimento per la fabbricazione di prodotti tubolari a curvatura complessa

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Publication number Priority date Publication date Assignee Title
US11440069B2 (en) 2013-11-15 2022-09-13 Greenlee Tools, Inc. Bender having a sensor configured to sense a workpiece

Also Published As

Publication number Publication date
US4567745A (en) 1986-02-04
EP0120336A1 (fr) 1984-10-03
CA1211032A (fr) 1986-09-09
EP0120336B1 (fr) 1988-06-08
DE3471892D1 (en) 1988-07-14

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