EP1115516B1 - Apparatus and method for bending tubular or rod-shaped material - Google Patents
Apparatus and method for bending tubular or rod-shaped material Download PDFInfo
- Publication number
- EP1115516B1 EP1115516B1 EP99969360A EP99969360A EP1115516B1 EP 1115516 B1 EP1115516 B1 EP 1115516B1 EP 99969360 A EP99969360 A EP 99969360A EP 99969360 A EP99969360 A EP 99969360A EP 1115516 B1 EP1115516 B1 EP 1115516B1
- Authority
- EP
- European Patent Office
- Prior art keywords
- movable roller
- bending
- roller
- conveying element
- arm
- 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 - Lifetime
Links
- 239000000463 material Substances 0.000 title claims description 33
- 238000005452 bending Methods 0.000 title claims description 26
- 238000000034 method Methods 0.000 title claims description 8
- 239000000725 suspension Substances 0.000 claims description 8
- 238000013519 translation Methods 0.000 claims description 5
- 230000002349 favourable effect Effects 0.000 description 4
- 230000014616 translation Effects 0.000 description 3
- 239000000047 product Substances 0.000 description 2
- 230000001419 dependent effect Effects 0.000 description 1
- 230000002542 deteriorative effect Effects 0.000 description 1
- 239000012467 final product Substances 0.000 description 1
Images
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21D—WORKING OR PROCESSING OF SHEET METAL OR METAL TUBES, RODS OR PROFILES WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21D7/00—Bending rods, profiles, or tubes
- B21D7/08—Bending rods, profiles, or tubes by passing between rollers or through a curved die
Definitions
- the invention relates to an apparatus for bending tubular or rod-shaped material, comprising a bending head provided with at least one rigidly mounted roller, at least one movable roller, suspension means, a steering plate, driven by motors, for enabling the movable roller to translate in a first translation direction, to translate in a second translation direction and to rotate around a rotation axis and a conveying element for conveying the material to be machined along its principal axis to the bending head.
- An apparatus of this type is known from EP-A-0 032 795.
- the movable roller is suspended in the steering plate.
- the steering plate and the steering motors are all mounted in front of the rigidly mounted roller, where they may form an obstacle which limits the performance of the apparatus.
- the apparatus according to the invention is characterized in that the at least one movable roller is attached to a first end of an arm, the steering plate is attached to a second end of the arm and the suspension means, supporting the arm, is supported in a spherical bearing, positioned between the first and the second end. In this way, the steering plate and the motors can be mounted completely out of the way of the bending head, forming no hindrance to the bending head.
- a favourable embodiment of the apparatus is thereto characterized in that the rigidly mounted roller is provided with drive means for supporting axial movements made by the conveying element.
- a favourable embodiment of the inventive apparatus is thereto characterized in that the conveying element is provided with drive means for rotating the material to be machined round its principal axis.
- Material to be bent is pushed into the groove of a movable roller while being bent.
- a favourable embodiment which exploits this fact is characterized in that the movable roller comprises only one roll. With one roll it is still more easy to replace the bending head when another type of material is to be bent.
- the invention also relates to a method for bending of tubular or rod-shaped material, using the apparatus as defined in claim 1.
- a favourable realisation of the inventive method is characterized in that in the bending process the material to be bent is rotated round its principal axis by the conveying element in order to support the movements of the movable roller.
- Fig. 1 schematically represents, in top view, a possible embodiment of the bending apparatus, where the material 1 to be processed is conveyed with the aid of a conveying element 2 to a bending head 3.
- Conveying element 2 comprises a slide 4, which may run along a bed 5, which bed 5 is mounted onto a frame 6.
- Conveying element 2 further comprises a clamp, not shown in Fig. 1 and well-known in the art, for clamping the material 1 to be processed, a first motor 7, for moving slide 4 towards bending head 3, a second motor 8, for rotating the material 1 to be processed together with the clamp round its principal axis, a first measuring instrument 9, for measuring the movement of the slide and a second measuring instrument 10, for measuring the rotation of the material to be processed.
- First measuring instrument 9 and second measuring instrument 10 are electromagnetic transducers, well-known in the art or electro-optical transducers integrated into slide 4. Measuring instrument 9 and second measuring instrument 10 determine the tolerances in the final product as produced by the apparatus.
- Bending head 3 consists of a rigidly mounted roller 11 and a movable roller 12.
- Movable roller 12 is connected, via an arm 13 and suspension means 14 to a steering element 15, which may be steered such that movable roller 12 may translate in the plane of the drawing, perpendicular to the plane of the drawing, can rotate round arm 13 and moreover can perform linear combinations of these movements.
- element 4 conveys the material to be processed and, if necessary, rotates it round its principle axis, at least substantial all types of curvatures can be given to the material 1 to be processed.
- some test specimen as for example a tube rebounds after bending, dependent on the type of material and the thickness of the wall, but this is in fact true for every type of bending apparatus.
- Fig. 2 schematically represents, in top view, a possible embodiment of the bending head 3, together with suspension means 14 and steering element 15.
- Steering element 15 comprises a system of three motors and three spindles, for translating and rotating arm 13, the movements of which are transferred to movable roller 12 via the suspension means 14, which are supported by a spherical bearing.
- Movable roller 12 has in fact only one roll, in which a groove is made, which groove encloses half of the material 1 to be processed. This substantially prevents the material 1 to be processed from buckling or deteriorating otherwise, while for movable roller 12 a large degree of freedom is guaranteed.
- Rigidly mounted roller 11 consists of four rolls, also provided with grooves, which are dimensioned such that the material 1 to be processed is supported all round yet it still remains possible to rotate the material 1 to be processed round its principal axis. Strictly speaking it is not necessary to drive the four rolls of rigidly mounted roller 11, but in this embodiment the rolls are driven and they are moreover mutually coupled with toothed wheels, mounted below the rolls.
- the advantage is that the material 1 to be processed deteriorates to a lesser extent and a sudden buckling of for example a thin-walled tube between the conveying element 2 the rigidly mounted roller 11 is prevented.
- Rigidly mounted roller 11, together with the toothed wheels below it, is built as a group that can easily be removed to be exchanged by another group if another type of material is to be processed.
- movable roller 13 is connected to arm 13 such that it is readily exchanged, for example with one bolt.
- By exchanging the entire bending head it is possible to mount for example smaller rolls with a smaller centre distance, such that finer material may be processed and that smaller radii may be realized. It is also possible to make a special bending head for special, non-circular material like strip. It is true that the strip-shaped material cannot be rotated within rigidly mounted roller 11, but all bends commonly used in processing strip can be made solely by manipulating movable roller 12.
- movable roller 13 may be of advantage to provide movable roller 13 with two rolls, notwithstanding the fact that only one roll is actively used in the bending process. This is for example the case if a number of bends must be made to the left and to the right. With one roll this is possible by rotating the material 1 every time 180 degrees with the aid of conveying element 2 or by moving movable roller 12 every time underneath the material 1 to be processed, but time can be saved by using two rolls.
- Fig. 3 schematically represents, in side view, a possible embodiment of the steering element 15.
- Steering element 15 comprises three motors 16,17,18, on one side mounted with hinges 19,20,21 to a frame 6, on another side provided with spindles 22,23,24, which spindles cooperate with screw-threaded holes in spherical bearings 25,26,27.
- a plate 28 can be translated in a vertical direction by steering motor 16, or translated in a horizontal direction by steering motors 17,18 in the same manner, or rotated around spherical bearing 25 by steering motors 17,18 in an opposite manner.
- Arm 13 is connected to the centre of plate 28 with the aid of a universal joint, not shown in the figure, such that the translations and the rotation can be exactly followed and passed to movable roller 12 via suspension means 14.
- Both the universal joint, connected to the centre of plate 28 and the spherical bearing 25 are mounted at the highest possible position within frame 6, as a consequence of which arm 13 runs practically parallel to the material 1 to be processed. This means that the material 1 to be processed is always situated in an optimal fashion in movable roller 12.
- spindles 22,23, 24, ball-guided spindles have been chosen, because any clearance here will immediately influence the tolerances of the product.
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Bending Of Plates, Rods, And Pipes (AREA)
Description
The invention relates to an apparatus for bending tubular
or rod-shaped material, comprising a bending head provided
with at least one rigidly mounted roller, at least one
movable roller, suspension means, a steering plate, driven
by motors, for enabling the movable roller to translate in
a first translation direction, to translate in a second
translation direction and to rotate around a rotation axis
and a conveying element for conveying the material to be
machined along its principal axis to the bending head.
An apparatus of this type is known from EP-A-0 032 795. In
the known apparatus, the movable roller is suspended in the
steering plate. This means that the steering plate and the
steering motors are all mounted in front of the rigidly
mounted roller, where they may form an obstacle which
limits the performance of the apparatus. The apparatus
according to the invention is characterized in that the at
least one movable roller is attached to a first end of an
arm, the steering plate is attached to a second end of the
arm and the suspension means, supporting the arm, is
supported in a spherical bearing, positioned between the
first and the second end. In this way, the steering plate
and the motors can be mounted completely out of the way of
the bending head, forming no hindrance to the bending head.
Although it is possible to realise any shape by merely
using the movable roller and the steering plate, it may be
of advantage, for example while processing thin-walled tube
that may collapse easily, to support axial movements of the
tube to be processed near the movable roller. A favourable
embodiment of the apparatus is thereto characterized in
that the rigidly mounted roller is provided with drive
means for supporting axial movements made by the conveying
element.
It may also be of advantage, for example while making two
bends that are not situated in one plane, to rotate the
tube in a controlled manner. A favourable embodiment of the
inventive apparatus is thereto characterized in that the
conveying element is provided with drive means for rotating
the material to be machined round its principal axis.
Material to be bent is pushed into the groove of a movable
roller while being bent. A favourable embodiment which
exploits this fact is characterized in that the movable
roller comprises only one roll. With one roll it is still
more easy to replace the bending head when another type of
material is to be bent.
The invention also relates to a method for bending of
tubular or rod-shaped material, using the apparatus
as defined in claim 1.
A favourable realisation of the inventive method is
characterized in that in the bending process the material
to be bent is rotated round its principal axis by the
conveying element in order to support the movements of the
movable roller.
The invention will be further explained with reference to
the following figures, in which:
- Fig. 1
- schematically represents, in top view, a possible embodiment of the bending apparatus;
- Fig. 2
- schematically represents, in top view, a possible embodiment of the bending head;
- Fig. 3
- schematically represents, in side view, a possible embodiment of the steering element.
Fig. 1 schematically represents, in top view, a possible
embodiment of the bending apparatus, where the material 1
to be processed is conveyed with the aid of a conveying
element 2 to a bending head 3. Conveying element 2
comprises a slide 4, which may run along a bed 5, which bed
5 is mounted onto a frame 6. Conveying element 2 further
comprises a clamp, not shown in Fig. 1 and well-known in
the art, for clamping the material 1 to be processed, a
first motor 7, for moving slide 4 towards bending head 3, a
second motor 8, for rotating the material 1 to be processed
together with the clamp round its principal axis, a first
measuring instrument 9, for measuring the movement of the
slide and a second measuring instrument 10, for measuring
the rotation of the material to be processed. First
measuring instrument 9 and second measuring instrument 10
are electromagnetic transducers, well-known in the art or
electro-optical transducers integrated into slide 4.
Measuring instrument 9 and second measuring instrument 10
determine the tolerances in the final product as produced
by the apparatus.
Bending head 3 consists of a rigidly mounted roller 11 and
a movable roller 12. Movable roller 12 is connected, via an
arm 13 and suspension means 14 to a steering element 15,
which may be steered such that movable roller 12 may
translate in the plane of the drawing, perpendicular to the
plane of the drawing, can rotate round arm 13 and moreover
can perform linear combinations of these movements. By
moving movable roller 12 in a suitable manner, while at the
same time element 4 conveys the material to be processed
and, if necessary, rotates it round its principle axis, at
least substantial all types of curvatures can be given to
the material 1 to be processed. For every product to be
developed it is necessary to produce some test specimen, as
for example a tube rebounds after bending, dependent on the
type of material and the thickness of the wall, but this is
in fact true for every type of bending apparatus.
Fig. 2 schematically represents, in top view, a possible
embodiment of the bending head 3, together with suspension
means 14 and steering element 15. Steering element 15
comprises a system of three motors and three spindles, for
translating and rotating arm 13, the movements of which are
transferred to movable roller 12 via the suspension means
14, which are supported by a spherical bearing.
Rigidly mounted roller 11, together with the toothed wheels
below it, is built as a group that can easily be removed to
be exchanged by another group if another type of material
is to be processed. In addition, movable roller 13 is
connected to arm 13 such that it is readily exchanged, for
example with one bolt. By exchanging the entire bending
head it is possible to mount for example smaller rolls with
a smaller centre distance, such that finer material may be
processed and that smaller radii may be realized. It is
also possible to make a special bending head for special,
non-circular material like strip. It is true that the
strip-shaped material cannot be rotated within rigidly
mounted roller 11, but all bends commonly used in
processing strip can be made solely by manipulating movable
roller 12.
Incidentally, it may be of advantage to provide movable
roller 13 with two rolls, notwithstanding the fact that
only one roll is actively used in the bending process. This
is for example the case if a number of bends must be made
to the left and to the right. With one roll this is
possible by rotating the material 1 every time 180 degrees
with the aid of conveying element 2 or by moving movable
roller 12 every time underneath the material 1 to be
processed, but time can be saved by using two rolls.
Fig. 3 schematically represents, in side view, a possible
embodiment of the steering element 15. Steering element 15
comprises three motors 16,17,18, on one side mounted with
hinges 19,20,21 to a frame 6, on another side provided with
spindles 22,23,24, which spindles cooperate with screw-threaded
holes in spherical bearings 25,26,27. With this
combination a plate 28 can be translated in a vertical
direction by steering motor 16, or translated in a
horizontal direction by steering motors 17,18 in the same
manner, or rotated around spherical bearing 25 by steering
motors 17,18 in an opposite manner. Arm 13 is connected to
the centre of plate 28 with the aid of a universal joint,
not shown in the figure, such that the translations and the
rotation can be exactly followed and passed to movable
roller 12 via suspension means 14. Both the universal
joint, connected to the centre of plate 28 and the
spherical bearing 25 are mounted at the highest possible
position within frame 6, as a consequence of which arm 13
runs practically parallel to the material 1 to be
processed. This means that the material 1 to be processed
is always situated in an optimal fashion in movable roller
12. For spindles 22,23, 24, ball-guided spindles have been
chosen, because any clearance here will immediately
influence the tolerances of the product.
Claims (6)
- Apparatus for bending tubular or rod-shaped material (1), comprising a bending head (3) provided with at least one rigidly mounted roller (11), at least one movable roller (12), suspension means (14), a steering plate (28), driven by motors (16,17,18), for enabling the movable roller (12) to translate in a first translation direction, to translate in a second translation direction and to rotate around a rotation axis and a conveying element (2) for conveying the material (1) to be machined along its principal axis to the bending head (3), characterized in that the at least one movable roller (12) is attached to a first end of an arm (13), the steering plate (28) is attached to a second end of the arm (13) and the suspension means (14), supporting the arm, is supported in a spherical bearing, positioned between the first and the second end.
- Apparatus according to claim 1, characterized in that the rigidly mounted roller (11) is provided with drive means for supporting axial movements made by the conveying element.
- Apparatus according to claim 1 or 2, characterized in that the conveying element (2) is provided with drive means (8) for rotating the material (1) to be machined round its principal axis.
- Apparatus according to one of the claims 1 to 3, characterized in that the movable roller (12) comprises only one roll.
- Method for bending of tubular or rod-shaped material (1), using an apparatus according to claim 1.
- Method according to claim 5, characterized in that in the bending process the material (1) to be bent is rotated round its principal axis by the conveying element (2) in order to support the movements of the movable roller (12).
Applications Claiming Priority (3)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| NL1010174 | 1998-09-24 | ||
| NL1010174A NL1010174C1 (en) | 1998-09-24 | 1998-09-24 | Apparatus and method for bending tubular and rod-shaped material. |
| PCT/NL1999/000587 WO2000016921A1 (en) | 1998-09-24 | 1999-09-21 | Apparatus and method for bending tubular or rod-shaped material |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| EP1115516A1 EP1115516A1 (en) | 2001-07-18 |
| EP1115516B1 true EP1115516B1 (en) | 2002-10-16 |
Family
ID=19767874
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| EP99969360A Expired - Lifetime EP1115516B1 (en) | 1998-09-24 | 1999-09-21 | Apparatus and method for bending tubular or rod-shaped material |
Country Status (4)
| Country | Link |
|---|---|
| EP (1) | EP1115516B1 (en) |
| DE (1) | DE69903574T2 (en) |
| NL (1) | NL1010174C1 (en) |
| WO (1) | WO2000016921A1 (en) |
Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JOP20190083A1 (en) | 2008-06-04 | 2017-06-16 | Amgen Inc | Fgf21 mutant fusion polypeptides and uses thereof |
| EP2628918B1 (en) | 2012-02-15 | 2020-04-22 | Ford Global Technologies, LLC | Method for operating an internal combustion engine with a turbocharger arrangement and control unit for an engine with a turbocharger arrangement |
| RU206818U1 (en) * | 2019-05-22 | 2021-09-29 | Российская Федерация, от имени которой выступает Государственная корпорация по космической деятельности "РОСКОСМОС" | PIPE BENDING DEVICE |
Family Cites Families (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3986381A (en) * | 1975-05-05 | 1976-10-19 | Vladimir Nikolaevich Shubin | Bending head for a tube bending machine |
| JPS56102319A (en) * | 1980-01-21 | 1981-08-15 | Inoue Mtp Co Ltd | Method and apparatus for bending long sized material |
| JPS6182932A (en) * | 1984-09-28 | 1986-04-26 | Hashimoto Forming Co Ltd | Method and device for continuously bending long-sized member along its axial line |
| DE19717232A1 (en) * | 1997-04-24 | 1998-10-29 | Suban Ag | Method and device for three-dimensional bending of hollow metal profiles |
-
1998
- 1998-09-24 NL NL1010174A patent/NL1010174C1/en active
-
1999
- 1999-09-21 EP EP99969360A patent/EP1115516B1/en not_active Expired - Lifetime
- 1999-09-21 WO PCT/NL1999/000587 patent/WO2000016921A1/en active IP Right Grant
- 1999-09-21 DE DE69903574T patent/DE69903574T2/en not_active Expired - Lifetime
Also Published As
| Publication number | Publication date |
|---|---|
| NL1010174C1 (en) | 2000-03-27 |
| WO2000016921A1 (en) | 2000-03-30 |
| EP1115516A1 (en) | 2001-07-18 |
| DE69903574T2 (en) | 2003-07-31 |
| DE69903574D1 (en) | 2002-11-21 |
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