EP3880381A1 - Device for bending rod-like workpieces - Google Patents
Device for bending rod-like workpiecesInfo
- Publication number
- EP3880381A1 EP3880381A1 EP19794962.1A EP19794962A EP3880381A1 EP 3880381 A1 EP3880381 A1 EP 3880381A1 EP 19794962 A EP19794962 A EP 19794962A EP 3880381 A1 EP3880381 A1 EP 3880381A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- bending
- bending head
- feed
- workpiece
- pivot lever
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
Links
- 238000005452 bending Methods 0.000 title claims abstract description 175
- 238000012545 processing Methods 0.000 claims abstract description 3
- 230000000295 complement effect Effects 0.000 claims description 3
- 230000000717 retained effect Effects 0.000 abstract 2
- 238000013461 design Methods 0.000 description 5
- 238000000034 method Methods 0.000 description 3
- 238000000465 moulding Methods 0.000 description 3
- 238000012423 maintenance Methods 0.000 description 2
- 230000005540 biological transmission Effects 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 238000001514 detection method Methods 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 239000000725 suspension Substances 0.000 description 1
- 238000012546 transfer Methods 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 1
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21D—WORKING OR PROCESSING OF SHEET METAL OR METAL TUBES, RODS OR PROFILES WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21D7/00—Bending rods, profiles, or tubes
- B21D7/02—Bending rods, profiles, or tubes over a stationary forming member; by use of a swinging forming member or abutment
- B21D7/024—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 device for bending rod-shaped workpieces, with egg nem base frame, at one end a bending head rotatable about an axis of rotation with two attached to this on opposite sides bending tools for bending in different bending directions is attached, and with one on the Grundge stell along a feed direction relative to the bending head movable carriage, which carries a pipe wrench and with which a workpiece held by the bending head can be fed to the processing.
- a feed slide with a pipe wrench is used, which is slidably received on a plate which is articulated on the machine frame at its one end region facing away from the bending head about an axis perpendicular to its clamping plane is.
- the plate can be pivoted to both sides of the machine frame from a position in which a workpiece held by the pipe wrench to feed it to the bending head towards the sem, whereby the storage of a machined workpiece as well as the inclusion of a new one Workpiece from a magazine at the side next to the machine frame is possible.
- a bending head which is fastened to a swivel arm and movable relative to it is used, the swivel arm on the machine frame and the bending head on the latter each being pivotable in a controlled manner about an axis of rotation parallel to the direction of the workpiece feed.
- the bending plane is not constant during operation, since the bending head must be pivoted about the two axes of rotation so that the fixed height and position of the workpiece can be approached.
- the bending plane cannot always be kept constant, for example aligned horizontally, but this is desirable for large bent parts or also for unstable workpieces.
- a bending device of the type mentioned at the outset is described in EP 2 756 891 B1, with which the workpieces to be bent can be bent both to the left and to the right.
- the bending head is attached to a swivel arm and the water on the machine frame can be pivoted.
- the axis of rotation of the swivel arm is designed as an eccentric pin of an eccentric shaft or as a pin on a rotatable swivel lever, the eccentric shaft or the rotatable swivel lever in turn being mounted on the machine frame about a central axis running parallel to the direction of advance of the workpiece.
- the bending head and the swivel arm supporting it must be pivoted relative to the machine frame in a similar way to the bending device from EP 1 350 578 B1 already mentioned above, whereby - as there - a considerable constructive Effort and complicated kinematics must be provided.
- the object of the invention is to develop such a bending device in such a way that it works with smaller moving masses with little design effort and less complex structure, and better accessibility.
- it should be able to remove the workpieces from a magazine, which no longer has to stand laterally in front of the machine and therefore does not restrict the bending space in front of the machine.
- a device of the type mentioned above is designed so that on the feed slide on its front side facing the bending head, a pivot lever is articulated at its end region about an axis of rotation which is rotatable parallel to the feed direction of the feed carriage, the other end region of which carries the pipe wrench and which has at least one pivot position has as a working position for supplying the workpiece held by the pipe wrench to the bending head.
- the pipe wrench can now be pivoted from the working position by rotating in a vertical plane on the feed carriage for receiving a new workpiece, and a new workpiece can be detected in another suitable pivoting position and then swiveled back into the working position, for this purpose to take up the new workpiece the feed slide with the pipe wrench next to the machine frame against the feed direction back into an initial position and only then the pivot lever is swung out.
- the swung-out pivot lever next to its working position is spent in an additional pivot position, in which it protrudes laterally beyond the base frame and extends downwards from the feed slide so that it is there laterally on the base frame down from egg nem next to it, but
- the magazine arranged behind the bending head thus outside the area of the bending head, can accommodate the new workpiece.
- This process requires only a relatively short idle time for changing parts and no additional hardware for handling.
- the return of the feed carriage to its initial position and the pivoting of the pivoting lever into the additional pivoting position can also be carried out considerably faster than in the case of a pivoting out of the entire machine bed, as in the generic device.
- a very particularly preferred embodiment of the invention is that the pivot lever not only one, but two (or more) pivot positions as working positions in which the workpiece held by the pipe wrench the bending tool of the bending head on two (or more) to each other different bending levels can be fed.
- the possibility of being able to perform the height adjustment for the individual bending planes through the pivot lever is significantly more advantageous than the assignment of different height adjustments for the bending planes through a complicated kinematics of the bending head and a pivot lever associated therewith.
- the movement of the feed carriage towards the bending tool and in the opposite direction can be implemented in any suitable manner, although it is particularly preferred if the feed carriage can be moved in the feed direction by means of a rack and pinion drive.
- a gearwheel for the rack and pinion drive is preferably attached to the underside of the base plate of the feed carriage, which gear can be driven by a drive motor which sits on the top side of the base plate.
- a preferred embodiment of the bending device according to the invention also consists in the fact that the rotatable bending head is articulated directly on the base frame.
- This is preferred here Base frame at its end facing the bending head on its upper side with an upstanding transverse wall, on which the bending head is rotatably fastened, the motor for rotating the bending head in the form of a servo motor with gear protruding through an opening in the transverse wall in the direction away from the bending head .
- the feed slide on its front facing the bending head has a front wall transversely to the feed direction, which protrudes upward from a base plate of the feed slide which can be moved along the guideway and on the front of which the pivot lever is held.
- a motor for pivoting the pivot lever is attached to the rear side of the front wall facing away from the pivot lever, which in turn has very good accessibility for maintenance purposes and a very space-saving arrangement can be realized.
- a servo motor with a gear is provided on the rear side of the pivoting lever facing away from the pipe wrench, which in turn ensures simple construction and good maintenance accessibility.
- a further advantageous embodiment of the invention also consists in that the pivoting lever is provided on its rear side facing away from the bending head with a molded projection which slidably engages in a receiving groove of complementary cross section in the front wall of the feed carriage at least in all working positions of the pivoting lever.
- a transfer of the feed forces to the swivel lever can also be achieved by positive locking, even in different swivel positions of the swivel lever as working positions, which allows the use of relatively large feed forces .
- the bending device according to the invention is of a remarkably low cost and thus also inexpensive to manufacture. You can work due to the low design on the wall and the arrangement used according to the invention so that a parts supply and removal of the machined parts can run parallel to each other, thus saving time and the machine output is increased.
- the workpieces can be fed close to the machine frame and behind the bending head, which requires little installation space, so that the bending space in front of the machine does not have to be restricted.
- the invention also makes it possible to arrange the receiving position of a new workpiece (z. B.
- the invention can, if desired, also be provided in pipe bending machines with a mandrel unit (in mandrel).
- the arrangement must be such that the mandrel unit follows the pivoting movement of the pivoting lever with the pipe wrench, which means, however, that z. B. the entire structure of the linear guides should be pivotable.
- the mandrel carriage can also be equipped with a swivel lever with Dor suspension, the basic structure of the mandrel carriage preferably corresponding to that of the feed unit. The mandrel would then swing out synchronously with the pipe wrench, thus realizing a mandrel bending machine which then also has the advantages of the invention mentioned above.
- Figure 1 is a perspective view of a bending device according to the invention (from behind) with a workpiece.
- Fig. 2 is a perspective view of the bending device of FIG. 1 from the front (with
- Fig. 3 is a perspective view of the bending devices of Figures 1 and 2 from the front, but in the retracted position of the feed carriage with completely in an additional pivot position outwardly pivoted Schwenkhe bel (with pipe wrench).
- Fig. 4 is the view from Fig. 3, with the pivoted pivot lever with pipe pliers for receiving a workpiece from an additional machine frame next to the Ma, behind the bending head, attached workpiece magazine, and
- 5A to 5E are schematic representations of different positions of the bending head
- Swing lever seen from the front.
- a device 1 for bending rod-shaped workpieces (such as pipes, rods or the like) is shown, which is to be referred to below only as a “bending machine”.
- This bending machine 1 has a base frame 2 as a machine frame, on the upper side of which a feed unit in the form of a feed slide 3 on two mutually parallel guides 4 is slidably attached along a guide path defined by these in a feed direction v (and also in the opposite direction).
- a bending head 5 is attached, which is fastened directly to a transverse wall 6 of the base frame 2 which runs vertically upwards to this end.
- a servo motor 7 with a gear is provided on the side of the bending head 5 facing the feed carriage 3, which projects through an opening 8 in the transverse wall 6 and projects there somewhat in the direction of the feed carriage 3, as shown in detail in FIG. 1.
- the bending head 5 can be rotated about an axis of rotation X relative to the base frame 2 by the motor 7.
- the bending head 5 is provided with two bending tools 9 and 10, which are provided on him on opposite sides ge for bends in two different bending directions.
- the bending tools 9 and 10 as forming units each comprise, as shown in particular in FIGS. 2 to 4, a bending mold 11 or 12 and also a clamping jaw 13 which can be adjusted relative to or away from it, with those shown in the figures
- Bending witnesses 9, 10 each have two bending molds 1 1 and 12 arranged one above the other, each of which defines its own bending level with the section of the clamping jaws 13 and 14 respectively assigned to it.
- these are well-known configurations of the forming units in bending machines, which are generally familiar to a person skilled in the art.
- a plate 15 is also provided for the attachment of a slide rail.
- the feed carriage 3 is provided on its front side facing the bending head 5 with a front wall 16 directed transversely to the feed direction v, the front wall 16 on a base plate 17 of the feed carriage 3 protrudes vertically upwards and can be moved along the guideway on the guides 4 for moving the feed carriage 3.
- a servo motor 20 with gears is provided for pivoting the pivoting lever 18, by means of which the pivoting lever 18 can be pivoted about an axis Y who can.
- the pipe wrench 19 is fastened to the swivel lever 18 via a pneumatic unit 21, with a servo motor 22 with gear being fastened on the opposite rear side of the swivel lever 18 for rotation of the pipe wrench 19.
- This servo motor 22 is attached to the pivot lever 18 in a position in which it cannot collide with the end face of the front wall 16 of the feed carriage 3 even when the pivot lever 18 is pivoted, as can be seen in particular from the illustrations in FIGS. 1 and 2 is.
- the feed slide 3 can be moved in the feed direction v (as well as in the opposite direction) by means of a toothed rack drive.
- a rack 23 brought, which meshes on the underside of the base plate 17 with a (not shown in the figures) gear that is driven by a servo motor 24 (with gear), which is arranged on the top of the base plate 17.
- the meshing between the sem gear and the rack 23 is provided at a position which results in a drive of the front slide 3 near the load application during operation, preferably directly in the line of action of the load application.
- the pivot lever 18 has at least one pivot position as a working position for the supply of the workpiece 25 held by the pipe wrench 19 on the bending head 5. In the embodiment shown in the figures, however, the pivot lever 18 can be pivoted into two pivot positions as working positions, which allows the supply of the workpiece 25 to be machined to the associated bending tool 9 at two different bending levels accordingly the two bending molds arranged one above the other on the latter.
- the state is shown that the bending head 5 is rotated so ge about its pivot axis X that one of the two bending tools, namely bending tool 9, is located above.
- the pivot lever 18 is pivoted into a first working position, in which the workpiece 25 supplied from the pipe wrench (not specifically shown in these figures) is fed to the lower of the two bending molds one above the other on the bending tool 9 in a corresponding bending plane.
- FIG. 5C an arrangement is shown as it results when the bending head 5 is rotated about its pivot axis X so that the other bending tool 10 is now on the top and its arrangement there is selected so that in order to carry out the bending process in egg ner to the position shown in FIGS. 5A and 5B opposite bending direction is made.
- 5C and 5D show, the workpiece 25 is now on the other side of the bending tool 10 against one of the two bends lying there one above the other and is (not shown in the figures) from this side against the Bending tool 10 clamped.
- 5C shows the position of the pivot lever 18 in its first working position, in which the workpiece 25 is fed to the lower of the two bending molds arranged here one above the other, while in FIG. 5D the state is shown is shown, in which the pivot lever 18 is again pivoted, as also in the representation of FIG. 5B, into a second working position, in which the tool 25 is now fed to the upper of the two superimposed bending forms of the bending tool 10.
- Fig. 5E illustrates the case of implementing the bending head 5 for changing the two bending tools 9 and 10, here the pivot lever 18 is placed in a further, still higher pivot position so that the possibility of pivoting the bending head 5 during its turning process Workpiece 25 is lifted out of engagement with one of the tools 9 or 10.
- a suitable overall control of the movement sequences ensures that all movements of the bending head 5 and the swivel lever 18 run in the right direction from one another in order to always ensure that the correct operating position is reached depending on the desired bending direction and the desired bending level.
- FIG. 5A illustrates a left bend at a first bend level
- FIG. 5B a left bend at a second bend level
- FIG. 5C a right bend at the first bend level
- Fig. 5D a right bending at the second bending level.
- Fig. 1 now shows a perspective view of the bending machine 1 from behind, the front slide 3 on the guideway is already so far in the direction of the bending head 5 that the workpiece 25 captured by the pipe wrench 19 is already on the bending tool 9 thereof Bending forms 1 1 is processed.
- FIG. 2 shows a perspective view of the bending machine 1 shown in FIG. 1 from the front, with the same position of the feed slide 3 as it has already been shown in FIG. 1.
- FIG. 3 again shows the perspective view of the bending machine 1 from the front, as in FIG.
- pivot lever 18 is pivoted out of the working position which it has assumed in FIG. 2 towards the outside of the base frame 2 in such a way that it is in this additional pivoting position from the front wall 16 of the feed carriage 3 and thus also of this laterally of the base frame 2 is inclined downwards, as is shown in Fig. 3 Darge, to which reference is made.
- FIG 3 shows the pipe wrench 19 fastened to the swivel lever 18 via the pneumatic unit 21 in a state in which it has not gripped a workpiece 25.
- Fig. 4 shows again the bending machine in the position as in Fig. 3, wherein in Fig. 4 additionally Lich a laterally positioned next to the bending machine 1 workpiece magazine 26 is Darge, in the illustration of Fig. 4 straight from one an upper inclined to level 27 arranged workpiece supply, the bottom workpiece 25 is brought into a downward position from where it is captured and clamped by the collet 19.
- a molding groove 29 is let into which a molded projection on the facing rear side of the pivot lever 18 engages when pivoting the pivot lever 18 and up to it can be moved to pivot in all working positions of the pivot lever 18.
- This molded projection has a cross-sectional shape of the shaped groove 29 complementary cross-sectional shape, so that in all working positions of the pivoting lever 18 during operation, a transmission of the feed forces to the pivoting lever 18 and thus to the pipe wrench 19 and the workpiece 5 to be inserted into the forming unit of the bending head fes 25 is guaranteed. Only in the unfolded end position of the pivot lever 18 for receiving a new workpiece 25, as shown in FIGS. 3 and 4, is the molding projection out of engagement with the molding groove 29.
- the bending machine 1 shown has a comparatively simple structure, is designed to be stable in the area of its essential elements and is easily accessible, thus maintenance-friendly, and it also permits simpler cable routing.
- pivoting the pivot lever 18 not only is it possible to carry out a desired change in the bending level as quickly as possible, but also to move the tool freely.
- the inclusion of a new workpiece 25 from a laterally arranged workpiece magazine 26 can be carried out easily and quickly, which also enables automatic parts feed using the existing axes, the additional advantage being achieved that the workpiece feed as well as the removal of the machined workpieces 25 can run parallel to each other, thus saving non-productive times and increasing the machine output.
- the workpiece magazine 26 can be close to the base frame 2 and behind the bending head 5, which means that a particularly small footprint is made possible and, in addition, the bending space in front of the bending machine is not restricted.
- Swivel lever which in turn can be pivoted on the base frame, as in many cases in the prior art) can also be carried out very quickly.
- the fixed connection of the bending head 5 with the base body 2 of the bending machine 1 leads to a particularly stable, more accessible and maintenance-friendly arrangement and enables the use of large drive powers.
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Bending Of Plates, Rods, And Pipes (AREA)
Abstract
Description
Claims
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE102018128903.0A DE102018128903A1 (en) | 2018-11-16 | 2018-11-16 | Device for bending rod-shaped workpieces |
PCT/EP2019/078935 WO2020099085A1 (en) | 2018-11-16 | 2019-10-23 | Device for bending rod-like workpieces |
Publications (2)
Publication Number | Publication Date |
---|---|
EP3880381A1 true EP3880381A1 (en) | 2021-09-22 |
EP3880381B1 EP3880381B1 (en) | 2022-07-06 |
Family
ID=68382432
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP19794962.1A Active EP3880381B1 (en) | 2018-11-16 | 2019-10-23 | Device for bending rod-like workpieces |
Country Status (3)
Country | Link |
---|---|
EP (1) | EP3880381B1 (en) |
DE (1) | DE102018128903A1 (en) |
WO (1) | WO2020099085A1 (en) |
Families Citing this family (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN112958661A (en) * | 2021-02-23 | 2021-06-15 | 广州聚物汇科技有限公司 | Intelligent pipe bending equipment |
Family Cites Families (7)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US4485658A (en) * | 1983-05-31 | 1984-12-04 | Stewart A K | Carriage assembly for a tube bending machine |
ATE121324T1 (en) * | 1989-09-20 | 1995-05-15 | Evg Entwicklung Verwert Ges | DEVICE FOR BENDING STEEL RODS TO CONCRETE REINFORCEMENT ELEMENTS. |
IT1290141B1 (en) | 1997-03-21 | 1998-10-19 | Blm Spa | MACHINE TO CURVE FILIFORM MATERIALS SUCH AS BAR TUBES OR PROFILES |
DE50100461D1 (en) * | 2001-01-30 | 2003-09-11 | Blm Spa | Machine for bending strand-like material, such as pipes, bars, profiles or metal wire |
EP1350578B1 (en) | 2002-04-03 | 2007-04-25 | Trumpf Werkzeugmaschinen GmbH + Co. KG | Machine for bending bar and/or rod-like workpieces, in particular tubes |
ITMI20071355A1 (en) * | 2007-07-09 | 2009-01-10 | Crippa Spa | BENDER MACHINE |
DE102013200850B4 (en) | 2013-01-21 | 2015-01-22 | Wafios Aktiengesellschaft | Device for bending strand-shaped workpieces |
-
2018
- 2018-11-16 DE DE102018128903.0A patent/DE102018128903A1/en active Pending
-
2019
- 2019-10-23 WO PCT/EP2019/078935 patent/WO2020099085A1/en unknown
- 2019-10-23 EP EP19794962.1A patent/EP3880381B1/en active Active
Also Published As
Publication number | Publication date |
---|---|
EP3880381B1 (en) | 2022-07-06 |
WO2020099085A1 (en) | 2020-05-22 |
DE102018128903A1 (en) | 2020-05-20 |
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