EP3738688A1 - Device for supporting a metal sheet during bending in a press brake - Google Patents

Device for supporting a metal sheet during bending in a press brake Download PDF

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Publication number
EP3738688A1
EP3738688A1 EP19174714.6A EP19174714A EP3738688A1 EP 3738688 A1 EP3738688 A1 EP 3738688A1 EP 19174714 A EP19174714 A EP 19174714A EP 3738688 A1 EP3738688 A1 EP 3738688A1
Authority
EP
European Patent Office
Prior art keywords
rod
base
support
metal sheet
belt
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
Application number
EP19174714.6A
Other languages
German (de)
French (fr)
Other versions
EP3738688B1 (en
Inventor
Marcel Hubertus Maria Thomassen
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Nivora IP BV
Original Assignee
Nivora IP BV
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Nivora IP BV filed Critical Nivora IP BV
Priority to EP19174714.6A priority Critical patent/EP3738688B1/en
Publication of EP3738688A1 publication Critical patent/EP3738688A1/en
Application granted granted Critical
Publication of EP3738688B1 publication Critical patent/EP3738688B1/en
Active legal-status Critical Current
Anticipated expiration legal-status Critical

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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
    • B21D5/00—Bending sheet metal along straight lines, e.g. to form simple curves
    • B21D5/02—Bending sheet metal along straight lines, e.g. to form simple curves on press brakes without making use of clamping means
    • B21D5/0281—Workpiece supporting devices

Definitions

  • the invention relates to a device for supporting a metal sheet during bending in a press brake, which device comprises:
  • Such a device is known from WO 2015139066 .
  • the free ends of the metal sheet When bending metal sheet in press brakes, the free ends of the metal sheet will tend to move up, when the press brake tools are brought together. Especially with large sheets, it is desired to support the free ends of the metal sheet to avoid any additional bending of the free ends. Also supporting the free ends of the metal sheet during bending ensures that the intended bend in the metal sheet is more accurate, than without support.
  • the device according to WO 2015139066 provides a support for supporting a metal sheet, which rotates around a rotation axis, which can coincide with the tools in a press brake, such that the support follows the same path as free ends of the metal sheet.
  • the device of WO 2015139066 is driven by an electric motor, driving a gear box, which coupled via lever and a connecting rod to the rod system of the device. All these parts introduce play into the driving means, which prevent accurate and precise manipulation of the free ends of the metal sheet during bending. The play can be reduced by costly solutions, which would make the device financially unattractive.
  • the use of a driven belt and one or more rollers provides a cost effective solution for the driving means. Furthermore, the small number of components in the driving means also reduce the play and requires minimal maintenance.
  • An additional advantage of the invention is that the driven belt with rollers allows for compact driving means and easy integration with the rod system, while the known driving means with gear box, lever and connecting means, typically require additional space outside.
  • the sequence of parts being the drivable spool, the one or more rollers and the belt mount are alternately arranged on the base and the one of the first, second or third rods.
  • the drivable spool is arranged to the base, one roller is arranged to the first rod, a second roller is again arranged to the base and the belt mount is arranged to the first rod. Then by having the belt running along a serpentine path between the driveable spool along the first and second roller to the drive mount, the rod system can be moved simply by winding up the belt or winding off the belt.
  • the drivable spool is driven by an electric motor.
  • An electric motor can easily be controlled by the controller of the press brake, such that the movement of the support is synchronized with the movement of the tools of the press brake and accordingly the bending of the metal sheet.
  • the support for supporting a metal sheet is rotatably arranged to the connecting third rod, wherein a fourth connecting rod is arranged with one end rotatably to the support and with the other end rotatably to the first or second rod and wherein the fourth connecting rod extends substantially parallel to the third connecting rod.
  • the fourth connecting rod together with the support, the connecting third rod and one of the first and second rod, provide a second parallelogram rod system, which moves synchronously with the main parallelogram rod system. This allows for support to be arranged at a distance from the rod system of the device and allows for better adaptation in height and distance to for example a press brake.
  • the support for supporting a metal sheet is substantially parallel to the first and second rod. This will ensure that the weight of the support and the supported metal sheet urge the first and second parallel rods together due to gravity.
  • the driving means can then pull the first and second rod away from each other, operating the rod system and lifting and rotating the support with the metal sheet around the rotation axis.
  • the driving means are arranged between the base and the first rod.
  • Figure 1 shows an embodiment of a device 1 according to the invention.
  • the device 1 has a base 2 with a press brake mount 3 and height adjustable support wheels 4.
  • the press brake mount 3 allows for mounting the device 1 to a press brake and the height adjustable support wheels 4 allow for the base 2 to be additionally supported under heavy conditions..
  • a first rod 5 is rotatably arranged around axle 6 to the base 2.
  • a second rod 7 is also rotatably arranged around axle 8 to the base 2.
  • a connecting third rod 9 keeps the first rod 5 and second rod 7 substantially parallel, while forming a parallelogram rod system.
  • a support 10 is rotatably connected to an end of the connecting rod 9 via the axle 11.
  • a fourth connecting rod 12 connected rotatbly with one end via axle 13 to the support 10 and with the other end via axle 14 to the second rod 7 ensures that the angle between the support 10 and the first rod 5 and the second rod 7 is constant during movement, preferably moves substantially parallel.
  • the support 10 supports a metal sheet 15, which extends between a lower tool 16 and an upper tool 17 of a press brake.
  • a driveable spool 18 is arranged to the base 2. Furthermore a belt mount 19 is arranged to the base 2, and first roller 20, second roller 21 and third roller 33 are alternately arranged to the first rod 5 and the base 2. A belt 23 is attached with one end to the belt mount 19 and with the other end to the driveable spool 18, while running along a serpentine path between the rollers 20, 21, 22.

Landscapes

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

Abstract

The invention relates to a device for supporting a metal sheet during bending in a press brake, which device comprises:
- a base;
- a support for supporting a metal sheet;
- a rod system arranged between the base and the support for rotating the support around a rotation axis relative to the base, wherein the rod system has a first and second rod substantially parallel to each other and rotatably arranged to the base and a connecting third rod rotatably arranged to the free ends of the first and second rods, such that the base, the first, second and third rods form a substantially parallelogram shaped rod system; and
- driving means arranged between the base and one of the first, second or third rods;
wherein the driving means comprise:
- a drivable spool;
- one or more rollers;
- a belt mount; and
- a belt mounted with one end to the belt mount and with the other end to the drivable spool;
wherein the belt runs along a serpentine path between the driveable spool, the one or more rollers and the belt mount.

Description

  • The invention relates to a device for supporting a metal sheet during bending in a press brake, which device comprises:
    • a base;
    • a support for supporting a metal sheet;
    • a rod system arranged between the base and the support for rotating the support around a rotation axis relative to the base, wherein the rod system has a first and second rod substantially parallel to each other and rotatably arranged to the base and a connecting third rod rotatably arranged to the free ends of the first and second rods, such that the base, the first, second and third rods form a substantially parallelogram shaped rod system; and
    • driving means arranged between the base and at least one of the first, second or third rods.
  • Such a device is known from WO 2015139066 .
  • When bending metal sheet in press brakes, the free ends of the metal sheet will tend to move up, when the press brake tools are brought together. Especially with large sheets, it is desired to support the free ends of the metal sheet to avoid any additional bending of the free ends. Also supporting the free ends of the metal sheet during bending ensures that the intended bend in the metal sheet is more accurate, than without support.
  • The device according to WO 2015139066 provides a support for supporting a metal sheet, which rotates around a rotation axis, which can coincide with the tools in a press brake, such that the support follows the same path as free ends of the metal sheet.
  • The device of WO 2015139066 is driven by an electric motor, driving a gear box, which coupled via lever and a connecting rod to the rod system of the device. All these parts introduce play into the driving means, which prevent accurate and precise manipulation of the free ends of the metal sheet during bending. The play can be reduced by costly solutions, which would make the device financially unattractive.
  • It is an object of the invention to reduce the above mentioned disadvantages according to the prior art.
  • This object is achieved with a device according to the preamble, which is characterized in that the driving means comprise:
    • a drivable spool;
    • one or more rollers;
    • a belt mount; and
    • a belt mounted with one end to the belt mount and with the other end to the drivable spool;
    wherein the belt runs along a serpentine path between the driveable spool, the one or more rollers and the belt mount.
  • The use of a driven belt and one or more rollers provides a cost effective solution for the driving means. Furthermore, the small number of components in the driving means also reduce the play and requires minimal maintenance.
  • An additional advantage of the invention, is that the driven belt with rollers allows for compact driving means and easy integration with the rod system, while the known driving means with gear box, lever and connecting means, typically require additional space outside.
  • In a preferred embodiment of the device according to the invention the sequence of parts being the drivable spool, the one or more rollers and the belt mount are alternately arranged on the base and the one of the first, second or third rods.
  • This means that for example, the drivable spool is arranged to the base, one roller is arranged to the first rod, a second roller is again arranged to the base and the belt mount is arranged to the first rod. Then by having the belt running along a serpentine path between the driveable spool along the first and second roller to the drive mount, the rod system can be moved simply by winding up the belt or winding off the belt.
  • Preferably, the drivable spool is driven by an electric motor. An electric motor can easily be controlled by the controller of the press brake, such that the movement of the support is synchronized with the movement of the tools of the press brake and accordingly the bending of the metal sheet.
  • In another preferred embodiment of the device according to the invention, the support for supporting a metal sheet is rotatably arranged to the connecting third rod, wherein a fourth connecting rod is arranged with one end rotatably to the support and with the other end rotatably to the first or second rod and wherein the fourth connecting rod extends substantially parallel to the third connecting rod.
  • The fourth connecting rod together with the support, the connecting third rod and one of the first and second rod, provide a second parallelogram rod system, which moves synchronously with the main parallelogram rod system. This allows for support to be arranged at a distance from the rod system of the device and allows for better adaptation in height and distance to for example a press brake.
  • Preferably, the support for supporting a metal sheet is substantially parallel to the first and second rod. This will ensure that the weight of the support and the supported metal sheet urge the first and second parallel rods together due to gravity. The driving means can then pull the first and second rod away from each other, operating the rod system and lifting and rotating the support with the metal sheet around the rotation axis.
  • Preferably, the driving means are arranged between the base and the first rod.
  • These and other features of the invention will be elucidated in conjunction with the accompanying drawings.
    • Figure 1 shows a side view of an embodiment of the device according to the invention with the support in a horizontal position.
    • Figure 2 shows the embodiment of figure 1 with the support in a tilted position.
  • Figure 1 shows an embodiment of a device 1 according to the invention. The device 1 has a base 2 with a press brake mount 3 and height adjustable support wheels 4. The press brake mount 3 allows for mounting the device 1 to a press brake and the height adjustable support wheels 4 allow for the base 2 to be additionally supported under heavy conditions..
  • A first rod 5 is rotatably arranged around axle 6 to the base 2. A second rod 7 is also rotatably arranged around axle 8 to the base 2. A connecting third rod 9 keeps the first rod 5 and second rod 7 substantially parallel, while forming a parallelogram rod system.
  • A support 10 is rotatably connected to an end of the connecting rod 9 via the axle 11. A fourth connecting rod 12 connected rotatbly with one end via axle 13 to the support 10 and with the other end via axle 14 to the second rod 7 ensures that the angle between the support 10 and the first rod 5 and the second rod 7 is constant during movement, preferably moves substantially parallel.
  • The support 10 supports a metal sheet 15, which extends between a lower tool 16 and an upper tool 17 of a press brake.
  • To drive the rod system 2, 5, 7, 9, 10, 12 a driveable spool 18 is arranged to the base 2. Furthermore a belt mount 19 is arranged to the base 2, and first roller 20, second roller 21 and third roller 33 are alternately arranged to the first rod 5 and the base 2. A belt 23 is attached with one end to the belt mount 19 and with the other end to the driveable spool 18, while running along a serpentine path between the rollers 20, 21, 22.
  • When the lower tool 16 and upper tool 17 of the press brake are brought together to bent the metal sheet 15, the driveable spool 18 will be driven to wind up the belt 23. As a result the rod system 2, 5, 7, 9, 10, 12 will start to move bringing the support 10 upward and rotating around a rotation axis 24 positioned at the lower tool 16, such that the metal sheet 15 is fully supported during the bending by the press brake and the tools 16, 17.

Claims (6)

  1. Device for supporting a metal sheet during bending in a press brake, which device comprises:
    - a base;
    - a support for supporting a metal sheet;
    - a rod system arranged between the base and the support for rotating the support around a rotation axis relative to the base, wherein the rod system has a first and second rod substantially parallel to each other and rotatably arranged to the base and a connecting third rod rotatably arranged to the free ends of the first and second rods, such that the base, the first, second and third rods form a substantially parallelogram shaped rod system; and
    - driving means arranged between the base and one of the first, second or third rods;
    characterized in that
    the driving means comprise:
    - a drivable spool;
    - one or more rollers;
    - a belt mount; and
    - a belt mounted with one end to the belt mount and with the other end to the drivable spool;
    wherein the belt runs along a serpentine path between the driveable spool, the one or more rollers and the belt mount.
  2. Device according to claim 1, wherein the sequence of parts being the drivable spool, the one or more rollers and the belt mount are alternately arranged on the base and the one of the first, second or third rods.
  3. Device according to claim 2, wherein the drivable spool is driven by an electric motor.
  4. Device according to any of the preceding claims, wherein the support for supporting a metal sheet is rotatably arranged to the connecting third rod, wherein a fourth connecting rod is arranged with one end rotatably to the support and with the other end rotatably to the first or second rod and wherein the fourth connecting rod extends substantially parallel to the third connecting rod.
  5. Device according to any of the preceding claims, wherein the support for supporting a metal sheet is substantially parallel to the first and second rod.
  6. Device according to claim 5, wherein the driving means are arranged between the base and the first rod.
EP19174714.6A 2019-05-15 2019-05-15 Device for supporting a metal sheet during bending in a press brake Active EP3738688B1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
EP19174714.6A EP3738688B1 (en) 2019-05-15 2019-05-15 Device for supporting a metal sheet during bending in a press brake

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
EP19174714.6A EP3738688B1 (en) 2019-05-15 2019-05-15 Device for supporting a metal sheet during bending in a press brake

Publications (2)

Publication Number Publication Date
EP3738688A1 true EP3738688A1 (en) 2020-11-18
EP3738688B1 EP3738688B1 (en) 2022-07-06

Family

ID=66589220

Family Applications (1)

Application Number Title Priority Date Filing Date
EP19174714.6A Active EP3738688B1 (en) 2019-05-15 2019-05-15 Device for supporting a metal sheet during bending in a press brake

Country Status (1)

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EP (1) EP3738688B1 (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR102560976B1 (en) * 2023-01-26 2023-07-28 최상태 Assistance supporter for bending machine

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS59113932A (en) * 1982-12-20 1984-06-30 Mitsubishi Electric Corp Material supporting device of press brake
FR2683470A1 (en) * 1991-11-13 1993-05-14 Capelle Michel ACCOMPAGNATOR OF TOLE FOR PRESS-PLY.
EP1221348A1 (en) * 2001-01-08 2002-07-10 Amada Europe Workpiece-supporting device for a bending machine
WO2015139066A1 (en) 2014-03-19 2015-09-24 Trumpf Maschinen Austria Gmbh & Co. Kg. Bending aid for a press brake

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS59113932A (en) * 1982-12-20 1984-06-30 Mitsubishi Electric Corp Material supporting device of press brake
FR2683470A1 (en) * 1991-11-13 1993-05-14 Capelle Michel ACCOMPAGNATOR OF TOLE FOR PRESS-PLY.
EP1221348A1 (en) * 2001-01-08 2002-07-10 Amada Europe Workpiece-supporting device for a bending machine
WO2015139066A1 (en) 2014-03-19 2015-09-24 Trumpf Maschinen Austria Gmbh & Co. Kg. Bending aid for a press brake

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR102560976B1 (en) * 2023-01-26 2023-07-28 최상태 Assistance supporter for bending machine

Also Published As

Publication number Publication date
EP3738688B1 (en) 2022-07-06

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