WO2002028562A1

WO2002028562A1 - Device and method for bending undulations

Info

Publication number: WO2002028562A1
Application number: PCT/EP2001/007305
Authority: WO
Inventors: Gerhard Rosenberger
Original assignee: Rosenberger Ag
Priority date: 2000-09-30
Filing date: 2001-06-26
Publication date: 2002-04-11
Also published as: DE10048556A1; EP1320428A1

Abstract

The invention relates to a method for bending undulations into longitudinal workpieces, in particular pipes. Said method uses at least two bending heads for retaining, bracing and bending, which are driven independently of one another on different planes in the respective directions X, Y and Z.

Description

DEVICE AND METHOD FOR BENDING MAEANDERS

The present invention relates to a method for bending meanders from elongated workpieces, in particular pipes, and an apparatus for performing the method.

Meanders are used in a wide variety of industries. They are essentially formed from a tubular workpiece, in which the workpiece is alternately bent into individual turns, which preferably run parallel.

Such meanders are used, for example, in cooling technology as heat exchangers or the like. Today, meanders are mostly made by hand using simple bending devices known in the art.

The present invention has for its object to provide a method for bending meanders and an apparatus for performing the method with which meanders can be bent fully automatically in a very simple, inexpensive and very fast manner. In particular, the manufacturing time is to be increased and the manufacturing tolerances are to be improved. Furthermore, different meanders in different widths and different widths should be able to be produced as desired.

The features of the main claim and the subordinate claims lead to the solution of this task.

In the present invention, two bending heads are preferably movable relative to one another and pivotable in different spaced planes. Each bending head can be moved independently in a first plane in the X and / or Y direction. At the same time, the bending head can be moved into a processing plane by moving in a Z direction.

The second bending head is likewise arranged to be movable in a second plane independently in the X and / or Y direction and can likewise be moved into a processing plane by moving in the Z axis and can also be moved there in the X and / or Y direction , be operated independently.

For bending meanders, the workpiece between the bending disc, clamping piece and Slide rail clamped and held as components of a bending head. A second bending head moves independently of a processing plane into the area of the workpiece, which takes it between the bending disc, clamping piece and slide rail. The second bending head is then pivoted about the first bending head with the clamped workpiece, so that the workpiece is bent around it.

The first bending head is then moved out of the workpiece again, in particular out of the working plane of the workpiece, by loosening the clamping piece and slide rail or bending disc and moves into a new position in order to space the workpiece again between a workpiece feed and the bending head which holds and holds the workpiece to then bend it again around the exciting bending head.

As a result, several meanders of any size and length and width can be produced, for example, from pipes, wound on a coil, without a new workpiece having to be clamped and set up for each meander.

In particular, the above-described method according to the invention can be used to produce very high production speeds, with varying widths, for the production of meanders.

Further advantages, features and details of the invention result from the following description of preferred exemplary embodiments and from the drawing; this shows in

Figure 1 is a schematic plan view of a device for bending meanders in a starting position;

Figures 2 to 9 schematically illustrated plan views of individual steps of the device for bending meanders according to Figure 1 in successive positions of use;

FIG. 10 shows a schematically represented side view of the device for bending meanders, in particular the arrangement of the bending heads;

FIG. 11 shows a schematically illustrated plan view of a conveyor device for moving an individual bending head on a guide device;

Figures 12a to 12c schematically illustrated examples of differently curved meanders.

According to FIG. 1, a device R according to the invention has a workpiece feed 1 which, for example, has a reel, a coil or the like. can be. From this, for example, a workpiece 2, in particular a tube, can be automatically unwound or fed to the device R.

In the preferred embodiment, the device R has a first bending head 3 and a second bending head 4, it being possible for one of the two bending heads to be designed as a holding device. A bending head 3, 4 preferably consists of a bending disk 5, a clamping piece 6 and a slide rail 7. The bending disk 5 can be moved, in particular rotatably, about an axis 8. Clamping piece 6 and slide rail 7 can be pivoted about the axis 8 of the flexible disk 5. Furthermore, the clamping piece β and the slide rail 7 can be moved or moved relative to the flexible disk 5. It can also be considered to move the flexible disk 5 against one another with respect to the clamping piece 6 or the slide rail 7, as indicated in the double arrow direction.

In the exemplary embodiment according to FIG. 10, it is indicated that the individual bending heads 3, 4 are arranged in different planes E1, E2, which, as shown in the double arrow direction, can each be moved in and out independently in a Z direction into a common processing plane E3.

The bending head 4 on a guide device 9.1 and the bending head 3 on a guide device 9.2 can each be moved independently in the X and Y directions. The bending head 3 or 4 can be moved independently in the X and / or in the Y direction, for example by means of a cross slide or definable tracks, guideways, guide rails or the like.

By simultaneously moving or moving in or against the Z direction shown, the bending head 3, 4 can be moved independently into the machining plane E3 in which the workpiece 2 to be machined lies.

The operation of the present invention is as follows:

According to FIG. 1, the bending head 3 is moved onto a workpiece 2 and by correspondingly moving against one another Clamping piece 6 and slide rail 7 against the bending disk 5, the workpiece 2 can be clamped in the bending head 3.

The second bending head 4 then moves at a freely selectable and determinable distance A between the bending head 3 and the workpiece feeder 1 outside the machining plane E3, see FIG. 10 under the workpiece 2 to be machined, and then moves, as indicated in FIG. 2, into the machining plane E3 into it, while the clamping piece 6 and slide rail 7 are spaced apart from the flexible disk 5, the workpiece 2 then being clamped by moving the clamping piece 6 and slide rail 7 back against the flexible disk 5 at a distance A from the bending head 4.

Before, during or after clamping the bending head 4, a free end 10 of the workpiece 2 is bent by pivoting the slide rail 7 and the bending disc 5 of the bending head 3 by 90 °. The free end 10 is preferably oriented at right angles to the adjoining workpiece 2 or to the workpiece feed 1, as shown in FIG. 2.

Subsequently, as indicated by dashed lines in FIG. 2, the workpiece 2 is pivoted by about 90 ° by means of the bending head 4 about the axis 8 of the bending head 3 or the bending disk 5 and reaches a position as shown in FIGS. 3 and 4.

At the same time, the bending disk 5 is pivoted by 90 ° during the movement of the bending head 4 around the bending head 3 and the clamping piece 6 is counter-rotated during the pivoting of the bending head 4 around the bending head 3 by 90 ° against the axis 8 of the bending head 4 or the flexible disk 5 swivels so that the workpiece 2 between the bending head 3 and workpiece feed 1 encloses an angle of about 90 ° about the bending head 4, a bent part of the workpiece 2 between the bending heads 4 and 3 running parallel to the free end 10.

The bending disc 5 of the bending head 3, which rotates or pivots with the clamping piece 6 when the bending head 4 is pivoted about the bending head 3 by 90 °, causes the free end 10 of the workpiece 2 to bend by 180 °.

Then, as shown in FIG. 4, the bending disk 5 of the bending head 3 is rotated by a further 90 °, the tensioning pieces 6 or slide rail 7 are extended relative to the bending disk in the direction of the arrow shown, so that the bending head 3 with the bending disk 5, tensioning piece 6 as a whole and slide rail 7 can be extended from the processing plane E3, as shown in FIG. 10, in order to again pick up the workpiece 2 between the bending head 4 and workpiece feeder 1 at a selectable distance A, as indicated in FIG. 5. The workpiece 2 can be moved back and forth by means of a holding device 11 for receiving and guiding the workpiece 2 in the X direction (see FIG. 1).

After the workpiece 2 has been picked up as described above, after the bending head 3 has been moved into the processing plane E3 and has picked up the workpiece 2 in the manner described above, this bending head 3 is pivoted or moved by a distance of 90 ° with respect to the bending head 4, wherein at the same time the bending disk 5 of the bending head 4 and the bending disk 5 of the bending head 3 are rotated by 90 °, as is shown in particular in FIG. 6, so that a section between the bending heads 3, 4 is again parallel to the previous section of the workpiece 2 , FIG. 7 shows how the clamping piece 6 and the slide rail 7 are then moved apart relative to the axis 8 of the bending disk 5 of the bending head 4 and the bending disk 5 of the bending head 4 is pivoted by a further 90 °, so that the bending head 4 is returned from the processing plane E3 10 can be moved back in the direction of the plane El, see FIG. 10, in order to move out of a bending region 12 of a 180 ° bend formed and then move to a new position for picking up the workpiece 2 again between the bending head 3 and the workpiece feeder 1 and back into the processing plane E3 Pick up and clamp the workpiece 2. The bending head 4 is then pivoted about the bending head 3 in the manner described above, the bending disc 5 and the clamping piece 6 are pivoted about the axis 8 of the bending head 3 in order to produce a new 180 ° bend, as is shown in FIGS. 8 and 9 , The bending disc 5 of the bending head 4 is also pivoted with the clamping piece 6.

An infinite number of individual windings 13 of any workpiece 2, in particular a tube, can thus be produced if this method is continued.

A meander M, as shown in FIGS. 12a to 12c, can be produced with any width B by defining the distance A.

At the same time, a width W of the meander M between two adjacent turns 13 can also be set as desired. As a result, a wide variety of shapes are conceivable and possible. It should also be within the scope of the present invention that, for example, a holding device instead of the bending head 3 or instead of the bending head 4 is provided to pick up the workpiece and move it around the bending head.

Are then must then, however, the position between the retaining device and the bending head exchanged, so that again, the holding means between the bending head and the workpiece feeder 1 receives the workpiece 2 and this again pivoted ^'about the bending head to the workpiece 2 to bend accordingly.

In the exemplary embodiment according to FIG. 11, a guide device 9.1 is shown as an example, from which it can be seen that the individual bending heads 3, 4 can be moved independently in the X and Y directions and can move any radii and swivel ranges. The individual bending heads 3, 4 are preferably seated on corresponding cross slides, on each of which a movement in the X and Y directions is possible independently.

Item number list

Claims

Patent claims

1. Method for bending meanders from elongated workpieces, in particular tubes, with at least two bending heads for receiving, clamping and bending, which are moved independently of one another in different planes in an X, Y and Z direction.

2.Method for bending meanders from elongated workpieces, in particular pipes with at least two bending heads for receiving, clamping and bending, a second bending head being moved to bend compared to a first bending head after clamping the workpiece and the first bending head then being moved out of the bend and is moved relative to the second bending head for reclamping a partial area to be bent.

3. A method for bending meanders from elongated workpieces, in particular tubes with at least two bending heads for receiving, clamping and bending, the bending heads each moving independently on an X and Y direction on cross slides and each in a Z direction be moved in or out of a bending area.

4. Process for bending meanders from elongated workpieces, in particular tubes with at least two

Bending heads for receiving, clamping and bending, wherein the bending heads are each arranged in different planes and are moved in the respective planes in an X and Y direction on selectable or fixed paths.

5. The method according to at least one of claims 1 to 4, characterized in that the workpiece is clamped in a first bending head by rotating the bending disc and slide rail about the Z-axis, the workpiece is bent by 90 ° and a second bending head between the first bending head and a workpiece feed, spaced apart from the first bending head, the workpiece receives and then moved, in particular pivoted, about the first bending head, the bending disk and clamping piece of the first bending head being rotated in accordance with the pivoting movement of the second bending head, the workpiece being at any angle to the first bending head , in particular an angle of about 90 °, is bent.

6. The method according to claim 5, characterized in that by pivoting the second bending head around the first bending head, they are spaced apart approximately in one plane after pivoting, the elements of the first bending head, in particular the bending disk, then being turned by 90 ° are rotated and the clamping piece and slide rail are moved out of a bending area and are then moved out of the bending area in the Z direction in order to pick up or clamp the workpiece clamped in the second bending head between the latter and the workpiece feed after pivoting around the second bending head by the bending head is moved to the workpiece, the slide rail and clamping piece and the bending disk are moved against each other in order to clamp the workpiece, the first bending head then being pivoted around the second bending head with the workpiece clamped, by moving the clamping piece and the bending disk A selectable bend is created on the first bending head and by simultaneously pivoting the bending disk and the Clamping piece of the second bending head, the workpiece is bent by a selectable angle, in particular 180 °, the elements of the second bending head, such as in particular the bending disk, then being rotated by 90 ° and the clamping piece and slide rail being moved out of the bending area in order to remove the second bending head from the Extend the bending area, the first bending head then being pivoted through 90 ° in order to again pick up the workpiece to be bent between the workpiece feed and the first bending head by moving in the Z direction.

7. The method according to claim 5 or 6, characterized in that by differently spacing the two bending heads a width (B) by differently sized bending disks different distances (A) between two adjacent legs of the workpiece are produced after bending.

8. The method according to at least one of claims 1 to 7, characterized in that a radius for a

Pivotal movement between the first and second bending head can be selected as desired to generate a definable width (B) of the meander.

9. Device for bending meanders from elongated workpieces, in particular tubes with at least two bending heads (3, 4) for receiving, clamping and bending, which can be moved independently of one another in different planes in an X, Y and Z direction.

10.Device for bending Mänader from elongated workpieces, in particular tubes with at least two bending heads (3, 4) for receiving, clamping and bending, a second bending head (4) compared to a first bending head (3) after clamping the workpiece (2 ) to the Bending is movable and the first bending head (3) can be extended from the bend produced and can be moved relative to the second bending head (4) in order to re-clamp a partial area to be bent.

11. Device for bending meanders from elongated workpieces, in particular tubes with at least two bending heads (3, 4) for receiving, clamping and bending, the bending heads (3, 4) each on conveyors, in particular cross slides independently in an X and a Y direction can be moved and these or their conveyor device can be moved in or out of a bending area in a Z direction.

12. Device for bending meanders from elongated workpieces, in particular tubes with at least two bending heads (3, 4) for receiving, clamping and bending, wherein a bending head (3 or 4) can be pivoted, in particular moved, relative to a holding element and the holding element relative to the bending head is.

13. Device for bending meanders from elongated workpieces, in particular tubes with at least two bending heads (3, 4) for receiving, clamping and bending, a first bending head (3) around a second bending head (4) and a second bending head (4) is movable, in particular pivotable, around the first bending head (3).

14. The device according to at least one of claims 9 to 13, characterized in that the at least one

Bending head (3, 4) has at least one bending disc (5) which can be pivoted about a Z axis and which can move and pivot a slide rail (7) and a clamping piece

(6) is assigned, the clamping piece (6) and slide rail (7) being pivotable about the Z axis of the flexible disk (5) and against which the bending head (3, 4) can be moved in or out.

15. The device according to at least one of claims 9 to 14, characterized in that each bending head (3, 4) on a separate guide device (9.1, 9.2), in particular on a separate cross slide for independent movement in the X and Y directions The guide devices (9.1, 9.2), in particular the bending heads (3, 4), are arranged one above the other in different planes (E1 and E2).

16. The device according to at least one of claims 9 to

15, characterized in that the bending heads (3, 4) or the guide device (9.1, 9.2) can be moved in and out in the Z direction into a common working plane E3.

17. The device according to at least one of claims 9 to

16, characterized in that between a workpiece feed (1) and the at least one bending head

(3, 4) a holding device (11) is provided, which can possibly be moved back and forth between the individual positions of two adjacent bending heads (3, 4).