EP0120336B1 - Machine à cintrer les tubes - Google Patents

Machine à cintrer les tubes Download PDF

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Publication number
EP0120336B1
EP0120336B1 EP84102164A EP84102164A EP0120336B1 EP 0120336 B1 EP0120336 B1 EP 0120336B1 EP 84102164 A EP84102164 A EP 84102164A EP 84102164 A EP84102164 A EP 84102164A EP 0120336 B1 EP0120336 B1 EP 0120336B1
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EP
European Patent Office
Prior art keywords
clamping
bending
bending template
template
cheek
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.)
Expired
Application number
EP84102164A
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German (de)
English (en)
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EP0120336A1 (fr
EP0120336B2 (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 with a feed carriage that transports the pipe and a bending table that can be pivoted on an axis and that has a bending template and a tensioning device that is opposite it and that can be pushed back and forth to the bending template and that is rotated with the bending template, the bending template with a clamping jaw and the tensioning device is provided with a counter-clamping jaws which have clamping surfaces which are matched to the pipe sections to be clamped and are each assigned to one another and which are each spatially separated from one another and can be brought into the working position.
  • a bending machine of the aforementioned design is known from the patent holder's German patent 26 26 202.
  • This document shows the suggestion to change the clamping jaws and counter-clamping jaws mechanically in order to bend pipes 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.
  • German Offenlegungsschrift 2,711,340 describes a bending tool in which the bending template can have one circumferential groove, but also several circumferential grooves.
  • the jaws and the counter-jaws each have one, two or more corresponding and facing grooves with different clamping surfaces.
  • the jaws, which cooperates with the bending template and the counter-jaws on the clamping device are jointly attached to the clamping device and are jointly parallel to the axis of rotation, ie. H. axial, raised and lowered.
  • the round tube can be clamped between the jaws and counter-jaws in the grooves due to the mobility of the counter-jaw in a horizontal plane relative to the jaws.
  • the upper grooves are at the level of the circumferential groove.
  • the always common movement of jaws and counter jaws is disadvantageous.
  • the horizontal connecting piece which connects the clamping jaws with counter-clamping jaws, prevents insertion of the tube between the clamping jaws and counter-clamping jaws from above.
  • the present invention is based on the task of improving the tube bending machine of the aforementioned design according to German Patent 26 26 202 with the aim of accelerating the change of the clamping surfaces with simplified and inexpensive production of the bending template with the clamping surfaces and without changing many clamping surfaces different To let form take effect.
  • the bending template having a clamping jaw and the tensioning device is provided with a counter-clamping jaws which have clamping surfaces which are adapted to the pipe sections to be clamped and are each assigned to one another and which are spatially separated from one another and can be brought into the working position
  • the clamping jaw of the bending template is provided with an associated piston-cylinder drive which is attached to the bending template and / or the counter-clamping jaws
  • the clamping device is provided with an associated piston-cylinder drive, which is attached to the clamping device and the bending template with the clamping jaw or the Clamping device with the counter jaw is provided with a respectively assigned guide, the respectively assigned drive moving the clamping or counter clamping jaws with
  • the proposal according to the invention that the jaws of the bending template is provided with an associated piston-cylinder drive which is attached to the bending template and / or the clamping jaws of the clamping device is provided with an associated piston-cylinder drive which is on the clamping device attached and the bending template with the jaw or the clamping device is provided with the counter jaw with an associated guide, has the advantage that only one of the jaws moves in the axial direction of the bending template on the associated holder, which is either the bending template or the clamping device can be.
  • the tubes to be bent can be inserted from above between the clamping jaws and counter-clamping jaws.
  • clamping jaws of the bending template and the counter clamping jaws of the tensioning device are also independent components that only interact when the tube is clamped on the bending template, in addition to the independent drive, a strongly time-shifted actuation can also take place, which corresponds to the rhythm of the bending or the individual bends is adjusted.
  • the solution according to the invention also 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 cooperating with the bending template, which usually lies opposite the slide rail, which also interacts with the bending template.
  • Wrinkle smoothers are used because when the tube is bent there is a tendency that the outer bend reduces its wall thickness due to the expansion of its wall thickness and not only increases the wall thickness of its inner bend due to the compression, but also forms folds.
  • additional devices can now be easily accommodated in the area of the circumference of the effective bending template, because the solution according to the invention takes up only a small space in relation to the area of the bending template.
  • 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 to first 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 location on the bending template, is a great relief.
  • the solution according to the invention also has the effect that the bodies with the clamping surfaces can be firmly attached to the bending template, as a rule in a recess provided there.
  • Fixed means that they can be easily lifted up and lowered down.
  • Fixed here means that the walls of the body with the clamping surface and the walls of the recesses of the bending template lie tightly against one another, so that in addition to the dimensional accuracy of the bending, the body used can withstand the high stresses during bending and clamping, because it is tight and covers the entire surface of the bending template is present.
  • the solution according to the invention allows various possibilities that can be easily adapted to the local conditions, the special design of a pipe bending 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. So 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 pipe outer diameter.
  • the clamping jaws of the bending template and / or the counter clamping jaws of the clamping jaw have different clamping surfaces assigned to the same circumferential groove of the bending template, the clamping surfaces of the clamping jaw and / or the clamping surfaces of the counter clamping jaw being arranged one above the other in a particularly advantageous manner.
  • a piston rod is fastened to the bending template and / or the clamping jaw in a vertical extension and on the cylinder assigned to the piston rod there are two bodies with respectively assigned different clamping surfaces which can be brought into the working position by displacement of the cylinder .
  • This solution is advantageous if only two different clamping surfaces are assigned to the bending template and also to the clamping jaw.
  • This solution makes it possible that a body arranged side by side or one above the other has two different clamping surfaces, for example the upper clamping surface is curved and the lower clamping surface is straight.
  • the solution described above is simple because there is only a shift in the vertical plane.
  • an axis of rotation for a shaft extending in a horizontal plane is arranged on the cylinder, at one end of which the two juxtaposed and interconnected bodies with the clamping surfaces are arranged, the aforementioned shaft being provided by an associated motor , in particular hydraulic motor, is rotatable 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 can be introduced into the recess of the bending template and arranged there in the working position.
  • This solution thus implies that, in addition to the movement in the vertical direction, there is a movement transverse to it. This transverse movement is a rotary movement in the case described above.
  • the rotary movement which is advantageously used in the case of two bodies with associated different clamping surfaces, wherein these two bodies can also be a single body which has two different clamping surfaces, is particularly simple and takes up little space.
  • the space occupied by the device is thus limited to a space above the bending template, so that this solution does not hinder 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.
  • each cylinder in its vertical extension downward pointing piston rod has a body with a clamping surface and, by moving horizontally and vertically, one body with a clamping surface or the other body with another clamping surface can be inserted into the recess of the bending template or the clamping jaw and arranged there in the working position .
  • This solution can be simplified by the requirement that the axis of rotation of the bending template upwards over the Bending template is also extended and at the upper end of this extension a transversely and thus horizontally extending bracket is arranged on which a horizontal extension rail is arranged, which is mounted on a counter bearing on the bending table and a slide can be moved on this rail on which cylinders are arranged one behind the other in the radial direction of the bending template the recess of the bending template and / or the clamping jaw can be introduced and is arranged there in the working position.
  • 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 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 actuated 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 in that a hydraulic or pneumatic piston-cylinder arrangement is arranged on the carrier plate, assigned to each clamping body.
  • This solution is advantageous because the piston rod is permanently connected to the clamping body and thus a safe and fast lifting and lowering of the clamping body can take place.
  • the carrier plate in addition to the aforementioned rotation of the carrier plate coaxial with 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.
  • the carrier plate with the clamp bodies mounted thereon can also be used for a so-called tier template in which a lower bending template of large diameter is placed another bending template of smaller 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 support plate consists of a U-shaped pot which has a very wide circumferential flange and openings are provided on the circumference of the flange, through which the piston rods reach, the pistons of which are in cylinders above the support plate or the flange are arranged and wherein the lower ends of the piston rods are each connected to an associated clamping 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 pivotably 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 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 tube 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 by amounts of up to 360 ° when successive pipe bends after to be curved 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 partly straight intermediate lengths between bends and partly straight intermediate lengths between bends do not exist.
  • This tube shown in FIG. 2 can be bent on the tube bending machine with a single relaxation. Such a machine is shown by way of example in FIG. 3.
  • 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.
  • 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 to the bending table 21 via the shaft 34 and is provided with a toggle lock 35 and 36.
  • the features described so far are known.
  • Fig. 4 shows the bending template 16, on which a body 31 is arranged, which has two clamping surfaces, namely an upper clamping surface 31a, which is curved and a lower clamping surface 31b, which is rectilinear.
  • a body 19 is provided on the clamping device 18, which also has two clamping surfaces, namely an overhead curved clamping surface 19a, which lies opposite the clamping surface 31a of the bending template 16, and a lower-lying clamping surface 19b, which lies opposite the clamping surface 31b and how this is rectilinear .
  • the piston rod 38 of a hydraulic cylinder 39 is fastened to the bending template 16 by means of screws 37, 37a etc.
  • the piston rod 41 of a hydraulic cylinder 42 is fastened to the tensioning device 18 by means of screws 40, 40a.
  • the bodies 19 and 31 have guides which guide them on the associated piston rods 38 and 41.
  • the body 31 has in the form of a bore a bracket 43 which engages around the piston rod 38.
  • the body 19 has a bracket 44.
  • the body 31 is connected to the cylinder 39 by a screw 45 and the body 19 is connected to the cylinder 42 by a screw 46.
  • Fig. 4 shows that the piston 46, which is arranged within a cylinder and is shown in broken lines, has its lower position and, accordingly, the body 31 has its upper position. The same conditions apply to the counter clamping surfaces.
  • the piston 46 has an upper position in the cylinder 39, with the proviso that the cylinder with the body 31 attached to it is moved down and thus the upper clamping surface 31a is in the plane of the groove 17 of the bending template 16 and comes into effect.
  • the same conditions apply to the counter-clamping surface of the body 19.
  • more than two of the clamping surfaces shown one above the other can also be used. However, this presupposes such a high position of the bending template that it is expedient to intercept it at the top by means of a rod which is supported at one end on the shaft 29 and at the other end on a bracket of the bending table 21.
  • Figures 6 and 7 show a solution in which the bending template has the usual height and is located just above the bending table.
  • a piston rod 38 is also provided on the bending template, namely on the top 47, which is provided with a piston 46 which is movable in the cylinder 39.
  • the shaft 49 is provided via a holder 48, on the front area of which there is a body 51 with a curved clamping surface 51 a and another body 52 with a straight clamping surface 52 a via a fastening plate 50.
  • a further holder 53 to which the hydraulic drive motor 53a is attached, which rotates the shaft 49 and thus brings the body 51 or the body 52 into the near region of the surface 47 of the bending template 16. If this has happened, the cylinder 39 is lowered in basically the same way as that described for FIGS. 4 and 5.
  • the piston 46 then has its upper position in the cylinder 39.
  • Fig. 7 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. In the surface 55 there is a protruding rounded strip 57.
  • a projecting bar 57 can also be assigned to the surface 56 of the bending 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. 8 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 end Body has 52.
  • the arm 62 is rotated by a hydraulic motor 64.
  • FIG. 9 shows that the piston rod 60 is extended before the rotation about the horizontal axis 62.
  • Fig. 10 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. 11 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. 11, the piston rod 60 is extended and thus the body 61 is extended from the recess of the bending template 16. Then the rotation is 180 °. that can be done in one direction or another.
  • FIG. 12 shows a particularly advantageous solution in side view and partly in section, because it enables more than two bodies with associated clamping surfaces.
  • a rail 65 which is secured against rotation by a corresponding bearing and which has a sufficient height distance from the bending template 16. This height distance is slightly larger than the height of a body with an assigned clamping surface.
  • the rail 65 extends in the 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, 19a 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. 12 shows the position that the body 72 can be moved into the bending template 16 and the body 19 into the tensioning device 18.
  • the retracted state results from FIG. 13 because the piston rods of the cylinders 68 and 69 are extended.
  • Fig. 15 shows the development of the solution shown in Fig. 12 with the proviso that at the head end of the shaft 29 as the axis of rotation of the bending table 21 with the bending template, a crossbar 78 is arranged, a rail 65 at one end and at the other End carries a rail 65a, which are attached to the bracket 66 as described in FIG. 12.
  • a carriage 79 can be moved via four slide bearings 78, 78a, 78b and 78c, specifically via the cylinder 20 attached to the bracket 66 (in principle shown in FIG. 1), the piston rod of which is attached to a crossbar 80 of the Carriage 79 is attached 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 1, to 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. 12 are arranged, the associated piston rods of which are the bodies Wear clamping surfaces, 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. 12, the piston rod 76 of which is connected to the carriage 84.
  • hydraulic cylinder with piston rod shown in FIG. 15 can also be the piston cylinder 20 shown in FIG. 3 with the piston rod 33, which, via a toggle lever lock, moves the tensioning device 18 in the direction of the bending template and away from it.
  • 16 shows the bodies 19 and 19a 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.
  • 16 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 the pipe is clamped to the bending template.
  • FIG. 17 shows the bending template 16 in a view from above.
  • the square support plate 85 is arranged above this and has clamping bodies 86, 86a, 86b and 86c assigned to each side.
  • the carrier plate has for holding the aforementioned clamping bodies in Fig. 18 associated guides 87 with a wedge 57a, as is also shown as a wedge 57 in FIG. 6.
  • 18 shows the recess 54 in the bending template 16, in which the wedge 57 is also present in the 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. 19 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 aforementioned 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 inside 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. 19 and 20 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 arrived.
  • a rotary motor can be a hydraulic motor.
  • An electric motor is also possible.
  • the solution of arranging the drives for lifting and lowering the clamping bodies and rotating the carrier plate on the carrier plate is advantageous because this solution enables a tube bending machine to be subsequently fitted with this solution above the bending template.
  • Fig. 21 shows the solution that the carrier plate can be moved radially 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 cylinder 99 fastened to the rail 96 via a holder 98, the piston rod 100 of which is fastened to a holder 101 of the slide 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, wherein, as described in relation to FIG. 18, a clamping body 86 is fastened to an associated piston rod 91.
  • the piston rod 103 of the cylinder 104 which raises and lowers the entire support plate 85, is fastened to the underside of the pot 102.
  • Fig. 21 shows the raised position of the support plate with the proviso that the above-mentioned clamping bodies 86, 86a, etc., by means of the hydraulic cylinders 93 assigned to them, populate the upper bending template 16 with the piston rods 91.
  • the piston rod 103 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 (19)

1. Machine à cintrer des tubes avec un chariot (10) transportant les tubes et une table à cintrer (21) pivotable autour d'un axe, qui comporte un gabarit de cintrage (16) et un dispositif de serrage (18), tournant avec le gabarit de cintrage, faisant face à celui-ci et déplaçable en va-et-vient par rapport à celui-ci, le gabarit de cintrage étant muni d'une mâchoire de serrage et le dispositif de serrage d'une contre-mâchoire de serrage, qui présentent des surfaces de serrage coordonnées entre elles, adaptés à chaque tronçon de tube à serrer, specialement séparées entre elles et pouvant être amenées dans la position de travail, caractérisée en ce que sur le gabarit de cintrage (16) et/ou le dispositif de serrage (18) se trouve prévu une surface d'appui, de préférence une cavité, pour la réception échangeable des mâchoire et contre-mâchoire de serrage, que la mâchoire de serrage (31, 51, 52, 71, 72) du gabarit de cintrage est munie d'un entraînement piston-cylindre (38, 39; 59, 60; 67, 68) associé, qui est fixé sur le gabarit de cintrage, et/ou la contre-mâchoire de serrage (19, 19a) du dispositif de serrage (18) est munie d'un entraînement piston-cylindre (41, 42; 69; 70) associé, qui est fixé sur le dispositif de serrage, et le gabarit de cintrage avec la mâchoire de serrage, ainsi que le dispositif de serrage avec la contre-mâchoire de serrage, sont munis chacun d'un guidage associé, l'entraînement faisant pénétrer chaque mâchoire de serrage ou contre-mâchoire de serrage par un déplacement vertical dans la cavité (54) ou la faisant sortir de celle-ci, et dans ladite cavité, à la place de la mâchoire ou contre-mâchoire de serrage munie de surfaces de serrage, une mâchoire ou contre-mâchoire de serrage contigûe ou autre, avec une surface de serrage, peut entrer et sortir.
2. Machine à cintrer les tubes selon la revendication 1, caractérisée en ce que la mâchoire de serrage (31) du gabarit de cintrage (16) et/ou la contre-mâchoire de serrage du dispositif de serrage (18), présentent des surfaces de serrage (31 a, 31b; 19a, 19b) différentes, associées à la même rainure périphérique (17) du gabarit de cintrage (16).
3. Machine à cintrer les tubes selon la revendication 1, caractérisée en ce que les surfaces de serrage (31a, 31b) de la mâchoire de serrage (31) et/ou les surfaces de serrage (19a, 19b) de la contre-mâchoirre de serrage (19) sont superposées.
4. Machine à cintrer les tubes selon la revendication 3, caractérisée en ce que sur le gabarit de cintrage (16) et/ou la mâchoire de serrage (18) se trouve fixée en position verticale une tige de piston (38) et que sur le cylindre (39) associé à la tige de piston sont disposés deux corps (31) associés chacun à des surfaces de serrage (31 a, 31b) différentes, qui peuvent être amenées dans leur position de travail par déplacement du cylindre (39).
5. Machine à cintrer les tubes selon les revendications 1 et 4, caractérisée en ce que sur le cylindre (39) se trouve disposé un axe de rotation d'un arbre (49) s'étendant dans un plan vertical, dont l'une des extrémités porte les deux corps (51, 52) disposés l'un à côté de l'autre et reliés entre eux, avec les surfaces de serrage (51a, 52a), ledit arbre (49) pouvant être mis en rotation à l'aide d'un moteur associé (53a), en particulier un moteur hydraulique, de telle façon qu'après une rotation appropriée de l'arbre et le déplacement du cylindre (39) sur la tige de piston (38), l'un (51) ou l'autre (52) des corps puisse être introduit dans la cavité (54) du gabarit de cintrage (16) et y être placé en position de travail.
6. Machine à cintrer les tubes selon la revendication 1, caractérisée en ce que sur le gabarit de cintrage (16) et/ou la mâchoire de serrage (18) se trouve fixé en position verticale un cylindre hydraulique (59) dont la tige de piston (60) présente, à son extrémité supérieure, un coussinet de pivotement (62) horizontal pour un bras de pivotement (63), dont une extrémité porte le corps (51) avec l'une des surfaces de serrage et l'autre extrémité porte le corps (52) avec l'autre surface de serrage et que par rotation des deux corps (51, 52) autour de l'axe de rotation (62) horizontal et par montée et descente de la tige de piston (60), et donc du bras de pivotement (63), l'un ou l'autre des corps (51, 52) puisse être amené dans la cavité (54) du gabarit de cintrage et y être placé en position de travail.
7. Machine à cintrer les tubes selon la revendication 6, caractérisée en ce que sur l'extrémité supérieure de la tige de piston (60) se trouve disposé un cantilever (61) horizontal dont l'extrémité avant porte un prolongement (65) dirigé vers le bas, et qu'au voisinage de l'extrêmité inférieure de ce prolongement se trouve disposé l'axe de rotation (62) horizontal.
8. Machine à cintrer les tubes selon la revendication 1, caractérisée en ce que dans une zone située au-dessus du gabarit de cintrage (16) et/ou de la mâchoire de serrage (18) se trouve disposée une tige de guidage (65) horizontale, sur laquelle peuvent se déplacer plusieurs cylindres hydrauliques (67, 68, 69, 70), chaque cylindre comportant, sur sa tige de piston dirigée verticalement vers le bas, un corps (71, 72, 19a, 19) avec des surfaces de serrage et que par un déplacement dans le sens horizontal et dans le sens vertical, l'un des corps portant l'une des surfaces de serrage ou l'autre des corps portant l'autre surface de serrage, au choix, peut être amenée dans la cavité (54) du gabarit de cintrage (16) ou de la mâchoire de serrage et y être placé en position de travail.
9. Machine à cintrer les tubes selon la revendication 8, caractérisée en ce que l'axe de rotation (29) du gabarit de cintrage (16) se prolonge vers le haut, au-delà du gabarit de cintrage et que sur l'extrêmité supérieure de ce prolongement est disposée une fixation (78) faisant saillie en direction perpendiculaire et donc horizontale, sur laquelle est disposée une glissière (65) s'étendant horizontalement, qui est fixée sur un contre-palier (66) de la table à cintrer (20), et que sur cette glissière (65) peut se déplacer un chariot (73) sur lequel sont disposés les uns derrière les autres les cylindres (67, 68, 69, 70), dans le sens radial du gabarit de cintrage, cylindres dont les tiges de piston dirigées vers le bas portent, sur leur extrémité inférieure avant, chacune un corps (71, 72, 19a, 19) avec des surfaces de serrage, et que par déplacement des corps dans le plan horizontal, et l'abaissement ainsi que la montée dans le plan vertical, l'un ou l'autre des corps peut être introduit dans la cavité du gabarit de cintrage et/ou de la mâchoire de serrage, et y être placé en position de travail.
10. Machine à cintrer les tubes selon la revendication 9, caractérisée en ce que sur l'axe de rotation (29) prolongé vers le haut du gabarit de cintrage (16) est fixé un cantilever (78) dont les deux extrêmités portent chacune une glissière (65, 65a), dont l'autre extrêmité est portée par un contre-palier (66) de la table à cintrer (20) et que sur les deux glissières (65, 65a) peut se déplacer un chariot (80, 81), et qu'en outre le chariot ainsi déplaçable est muni d'un guidage (82, 82a), sur lequel peuvent se déplacer au moins deux des cylindres (69, 70) disposés l'un derrière l'autre, dans le sens radial du gabarit de cintrage, cylindres dont la tige de piston dirigée vers le bas porte les corps ayant les surfaces de serrage.
11. Machine à cintrer les tubes selon la revendication 1 et une ou plusieurs des revendications 2 à 10, caractérisée en ce que dans la cavité (54) du gabarit de cintrage (16) et sur les corps (51, 52), sur une des faces (55, 58) superposées en position de travail, se trouve un guidage (57, 59) ayant de préférence la structure d'une rainure ou d'un ressort.
12. Machine à cintrer les tubes selon la revendication 1, caractérisée en ce qu'au dessus du gabarit de cintrage (16) et de façon coaxiale par rapport à son axe de rotation (26), se trouve monté en rotation par rapport au gabarit de cintrage, dans le même plan horizontal que le gabarit de cintrage, un dispositif de support (85), de préférence sous la forme d'une plaque de support, une pluralité de corps de serrage (86, 86a, etc.) étant placés au voisinage de la périphérie de cette plaque et que ces corps de serrage peuvent être déplacés de la plaque de support dans la cavité (54) du gabarit de cintrage (16).
13. Machine à cintrer les tubes selon la revendication 12, caractérisée en ce que sur la plaque de support (85) est disposé un ensemble piston-cylindre (88, 89, 90, 91) à actionnement hydraulique ou pneumatique, qui fait pénétrer dans la cavité (54) du gabarit de cintrage (16) au moins un des corps de serrage (86) et le fait sortir de cette cavité.
14. Machine à cintrer les tubes selon la revendication 12, caractérisée en ce que sur la plaque de support (85) est disposée un ensemble piston-cylindre (93) à actionnement hydraulique ou pneumatique, associé à chaque corps de serrage (86).
15. Machine à cintrer les tubes selon la revendication 12, caractérisée en ce que la plaque de support (85) est déplaçable parallèlement au gabarit de cintrage (16), en direction radiale par rapport à celui-ci.
16. Machine à cintrer les tubes selon la revendication 15, caractérisée en ce que dans la zone comprise entre la plaque de cintrage (16) et la plaque de support (85) est disposé un ensemble piston-cylindre (99, 100) permettant de déplacer la plaque de support (85) en direction radiale par rapport au gabarit de cintrage ou sur le gabarit de cintrage.
17. Machine à cintrer les tubes selon la revendication 12 ou un ou plusieurs des revendications 13 à 16, caractérisée en ce que la plaque de support (85) est montée de façon déplaçable axialement par rapport au gabarit de cintrage.
18. Machine à cintrer les tubes selon la revendication 17, caractérisée en ce que sur la face supérieure du gabarit de cintrage (16) est disposé un ensemble piston-cylindre (104, 105) pour soulever la plaque de support (85).
19. Machine à cintrer les tubes selon la revendication 18, caractérisée en ce que la plaque de support (85) est constituée par un pot (102) en forme de U, qui présente une bride (103) périphérique très large, et que sur la périphérie de la bride se trouvent des ouvertures que traversent les tiges de piston (91) dont les pistons sont disposés dans des cylindres (93) au-dessus de la plaque de support, c'est à dire de la bride (103), les extrémités inférieures des tiges de piston (91) étant reliés chacun à un corps de serrage (86) associé.
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

Publications (3)

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

Family

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Family Applications (1)

Application Number Title Priority Date Filing Date
EP84102164A Expired - Lifetime EP0120336B2 (fr) 1983-03-26 1984-03-01 Machine à cintrer les tubes

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

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DE3516923A1 (de) * 1985-05-10 1986-11-13 Rigobert Dipl.-Ing. 5000 Köln Schwarze Rohrbiegemaschine
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
WO2015073805A1 (fr) 2013-11-15 2015-05-21 Greenlee Textron Inc. Fourniture de données pour fonctionnement de cintreuse automatisée
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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US3147792A (en) * 1961-09-25 1964-09-08 Charles F Hautau Tube and bar bending machinery
DE1962590A1 (de) * 1969-12-13 1971-06-24 Hilgers Maschinen U App Bauans Rohrbiegemaschine
DE2101162A1 (de) * 1971-01-12 1972-07-20 J. Banning Ag, 4700 Hamm Rohrbiegemaschine
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DE2626202C2 (de) * 1976-06-11 1992-10-29 Rigobert Dipl.-Ing. 5000 Köln Schwarze Rohrbiegemaschine
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US4085608A (en) * 1977-05-02 1978-04-25 Burr Oak Tool & Gauge Company Return elbow and crossover bender
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US4495788A (en) * 1982-08-02 1985-01-29 Eaton-Leonard Corporation Multiple curvature bender

Also Published As

Publication number Publication date
US4567745A (en) 1986-02-04
CA1211032A (fr) 1986-09-09
EP0120336A1 (fr) 1984-10-03
EP0120336B2 (fr) 1991-10-09
DE3471892D1 (en) 1988-07-14

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