US20030097868A1 - Sheet metal follower associated with a press for bending sheet metal - Google Patents

Sheet metal follower associated with a press for bending sheet metal Download PDF

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Publication number
US20030097868A1
US20030097868A1 US10/036,411 US3641102A US2003097868A1 US 20030097868 A1 US20030097868 A1 US 20030097868A1 US 3641102 A US3641102 A US 3641102A US 2003097868 A1 US2003097868 A1 US 2003097868A1
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US
United States
Prior art keywords
follower
toothed wheel
pivot
sheet metal
support
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.)
Abandoned
Application number
US10/036,411
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English (en)
Inventor
Morikatsu Matsuda
Gerard Quesnel
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.)
Amada Europe SA
Original Assignee
Amada Europe SA
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 Amada Europe SA filed Critical Amada Europe SA
Assigned to AMADA EUROPE reassignment AMADA EUROPE ASSIGNMENT OF ASSIGNORS INTEREST (SEE DOCUMENT FOR DETAILS). Assignors: MATSUDA, MORIKATSU, QUESNEL, GERARD
Publication of US20030097868A1 publication Critical patent/US20030097868A1/en
Abandoned legal-status Critical Current

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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 present invention relates to a sheet metal follower associated with a press for bending a metal sheet, the follower being of the type comprising a gap frame, a stationary bottom table carrying a horizontal matrix of triangular section and a vertically moving top table carrying a bending punch, the sheet metal follower comprising:
  • a sliding support mounted to slide vertically on at least one vertical rail of the base plate
  • a vertical drive mechanism comprising a wormscrew and a nut, the vertical nut co-operating with a first servo-motor and meshing with tapping of the nut fixed to the sliding support;
  • a pivot mechanism mounted on the sliding support and capable of causing the follower table to tilt synchronously with the vertical movement of the sliding support so that the plane in which the top face of said follower table lies contains the front top edge of the matrix, said mechanism presenting:
  • a pivot arm having one end keyed to the pivot shaft and having its other end carrying a rotary shaft mounted to rotate freely;
  • At least one first toothed wheel mounted on the pivot shaft in such a manner as to be capable of remaining stationary while said shaft pivots;
  • connection arm secured to the second toothed wheel and to the follower table.
  • That type of follower constitutes the subject matter of unpublished Japanese application No. 11-199185 of Jul. 13, 1999 and presents a certain number of drawbacks, due in particular to using a large number of toothed wheels or gearwheels. In spite of the particular care taken when milling the teeth, it is inevitable that a small amount of slack will always exist between two toothed wheels that mesh one in the other, said slack increasing as the sheet metal follower continues to be used.
  • the object of the present invention is to propose means enabling the above-mentioned drawbacks to be attenuated or even eliminated.
  • the invention proposes that the first toothed wheel which is prevented from rotating is connected to the second toothed wheel by a cog belt snugly engaging the teeth of the first and second toothed wheels, that the second toothed wheel turns, pivoting inside the cog belt under the action of the pivot arm moving the rotary shaft and the second toothed wheel along a circular arc, that the pivoting movement of the second toothed wheel secured to the follower table causes said table to pivot about the rotary shaft, and that the upward and downward movements of the follower table are synchronized with the pivoting movements thereof such that the plane in which the top support surface of said table lies always contains the front edge of the matrix of the bending press.
  • the invention proposes that the pivot shaft is supported in two bearings each mounted in a lateral support arm secured to the top portion of one or other of the vertical edges of the sliding support and directed towards the follower table, that the pivot shaft carries on either side of the pivot arm a first toothed wheel mounted rotate freely relative to the pivot arm, that on either side of the front end of the pivot arm situated adjacent to the follower table the rotary shaft is secured to a second toothed wheel coplanar with the corresponding first toothed wheel, that each second toothed wheel is fixed on a radial connection arm provided at the rear end of the follower table, that first and second roller chains or the like pass around respective pairs of coplanar first and second toothed wheels, and that each first toothed wheel is associated with tensioning and repulsion means, where those associated with the first toothed wheel co-operating with the first chain act on the top strand of said chain in a first direction corresponding to the clockwise direction such that the rollers of the first chain bear against
  • FIG. 1 is a diagrammatic side view in elevation of a first embodiment of the sheet metal follower, and in particular of its pivot mechanism;
  • FIG. 2 is a diagrammatic perspective view of a second embodiment of the pivot mechanism of the sheet metal follower
  • FIG. 3 is a diagrammatic plan view of the second embodiment
  • FIG. 4 is a detail plan view of the rear portion of the second embodiment as shown in FIG. 3;
  • FIG. 5 is a more detailed diagram of the tensioning and repulsion means associated with one of the first toothed wheels
  • FIG. 6 is a detail plan view of the second embodiment of the pivot mechanism
  • FIG. 7 is a diagrammatic plan view of an follower table in which the sheet metal follower is provided with a support for a removable extension;
  • FIG. 8 is a perspective view of the FIG. 7 extension support.
  • FIG. 9 is a diagrammatic side view in elevation and in section of the follower table on IX-IX of FIG. 7.
  • the sheet metal follower comprises a follower table 1 for accompanying a metal sheet 2 to be bent and associated with a conventional bending press 3 of the type comprising a gap frame (not shown), a stationary bottom table 4 carrying a horizontal matrix 5 of triangular cross-section, and a vertically movable top table 6 carrying a bending punch 7 for thrusting a portion of the metal sheet 2 into the matrix 5 .
  • the sheet metal follower comprises a base plate 8 which extends substantially vertically and which is mounted on the front face of the stationary bottom table 4 via a pair of horizontal rails 9 provided on the front face of the stationary bottom table 4 and along which said base plate 8 is guided and movable horizontally.
  • the sheet metal follower also comprises a pivot mechanism 20 which is mounted on the sliding support 10 and capable of causing the follower table 1 proper to tilt or pivot synchronously with the vertical movement of the sliding support 10 so that the bearing top face of the follower table 1 lies in a plane 21 that substantially intersects the front top edge 5 a of the matrix 5 during an operation of bending the metal sheet 2 .
  • the pivot mechanism 20 comprises at least one and preferably two support arms 22 secured to the front face of the top portion of the sliding support 10 .
  • each of them is secured to one or other vertical edge of the sliding support 10 and is directed forwards from the front face thereof perpendicularly relative to said front face.
  • a pivot arm 23 is received in a bearing 24 of each lateral support arm 22 and carries a gearwheel 25 at one of its free ends which is keyed to said shaft 23 and which meshes with a gearwheel 26 constraints to rotate with the outlet shaft of a second servo-motor 27 whose casing is mounted on the sliding support 10 .
  • a pivot arm 28 is keyed at its rear end to the pivot shaft 23 and at its other or front end carries a rotary shaft 29 mounted to rotate freely in a ball bearing 30 provided in the said front end of said rotary shaft 29 .
  • first toothed wheel 31 On the pivot shaft 23 , and said shaft 23 can turn freely relative thereto by means of a bearing, e.g. of the ball bearing type 32 interposed between the shaft 23 and the hub of the first toothed wheel 31 .
  • a bearing e.g. of the ball bearing type 32 interposed between the shaft 23 and the hub of the first toothed wheel 31 .
  • another first toothed wheel 31 is provided on the pivot shaft 23 between the other support arm and the pivot arm 28 .
  • the first toothed wheel 31 is prevented from rotating and is preferably locked to the adjacent support arm 22 .
  • it can have one or two support arms 22 , one or two first toothed wheels 31 , one or two second toothed wheels 33 , and the corresponding bearings 24 , 30 , and 32 .
  • the front end of the pivot arm 28 has a rotary shaft 29 turning freely in a ball bearing type bearing 30 mounted in a suitable housing at the front end of said pivot arm 28 .
  • the rotary shaft 29 is provided with at least one second toothed wheel 33 keyed onto said shaft 29 in a position where it is coplanar with a corresponding first toothed wheel 31 .
  • the rotary shaft 29 is provided with two second toothed wheels on either side of the pivot arm.
  • a connection arm 34 extending preferably in a diametral plane of the second toothed wheel 33 is fixed by means of bolts 35 thereto and is also secured to the follower table 1 .
  • the first toothed wheel 31 is connected to the second toothed wheel 33 by a cog belt 36 whose cogs engage snugly in the gaps between successive teeth in the first and second toothed wheels 31 and 33 that are coplanar (see FIG. 1).
  • a cog belt 36 whose cogs engage snugly in the gaps between successive teeth in the first and second toothed wheels 31 and 33 that are coplanar (see FIG. 1).
  • Operation is as follows: during a bending operation, the first servo-motor 15 drives the sliding support 10 upwards to a level where the support face of the table 1 is at the same height as the edge 5 a of the matrix 5 , said table then being substantially horizontal.
  • the pivot arm 28 pivots about the axis of the shaft 23 to which it is secured and moves the rotary shaft 29 upwards together with the second toothed wheel 33 along a circular arc centered on the shaft 23 . Since the first toothed wheel 31 does not turn, the strands of the cog belt 36 cannot move in the longitudinal direction.
  • the weight of the sheet to be supported by the follower table 1 is greater than about 80 kg, it is preferable to use at least one, and preferably two, chains 40 of roller or any other suitable type in combination with tensioning and damping means 41 which press against or push each transverse roller 42 or the like of the chain 40 so that it presses against the flank 31 a of a corresponding tooth 31 b of the first toothed wheel 31 , so that the top strand 43 of the chain 40 , 40 a is always under tension and so that its transverse rollers 42 are always pressed against the flanks 31 a of the corresponding teeth 31 b when said rollers 42 are received in the gaps between the flanks of two adjacent teeth 31 b.
  • the tensioning and repulsion means 31 associated with a first chain 40 a are arranged in such a manner that the top strand 43 of said first chain 40 a is tensioned in the direction of arrow 44 towards the sliding support 10 and the tensioning and repulsion means 41 associated with the second chain 40 b which is parallel to the first chain ( 40 a ) are arranged in such a manner that the bottom strand 45 of the second chain 40 b is tensioned in the direction of arrow 45 towards the sliding support 10 .
  • the rollers 42 of the bottom strand 45 of the second chain 40 b are pressed against the opposite flanks 31 c of each tooth 31 b of the toothed wheel 31 engaged with the second chain 40 b.
  • the tensioning and repulsion means 41 in each of the stationary first toothed wheels 31 comprise at least one oblong slot 47 extending circumferentially and presenting a section that can be rectangular, annular, etc. in shape, for example, and preferably, a plurality of such slots 47 a , 47 b , 47 c , and 47 d provided in the body of each first toothed wheel 31 and distributed uniformly around the cylindrical passage for the pivot arm 23 , a thrust peg 48 fixed in a transverse housing 49 of a support arm 22 and extending transversely and parallel to the pivot arm 23 so as to penetrate at its free end into one of the oblong slots 47 a to 47 d of the first toothed wheel 31 , and a compression spring 50 disposed in the corresponding oblong slot (e.g.
  • FIG. 5 it can clearly be seen how the pegs 48 and the compression springs 50 mounted in the slots 47 a to 47 d of the first toothed wheel 31 are disposed relative to one another for the purpose of subjecting the top strand 43 of the chain 40 , 40 a to a tension or traction force directed along arrow 44 towards the sliding support 10 , or in other words clockwise (see arrow 51 ).
  • each of the slots 47 a to 47 d receives a compression spring 50 which, relative to the direction of arrow 51 , bears firstly against the front end of the corresponding slot ( 47 a to 47 d ) and secondly against the front side face of the corresponding peg 48 , thereby urging the rear end of the slot against the rear side face of the peg in question.
  • the present invention proposes a simple solution that enables additional followers to be omitted by replacing them with a support extension that is mounted removably on the top end of the follower table 1 .
  • the crossbar 63 of the extension support 62 presents, in its center, a cylindrical hole 66 for passing a fixing bolt 67 whose threaded portion passes through an oblong slot (not shown) in the intermediate plate 56 and is screwed into a nut (not shown) that holds it against the bottom face of said plate 56 .
  • the oblong hole extends mainly perpendicularly to the front face 64 of the bending press 3 . This makes it possible to adapt the positions of crossbars 63 of different widths.
  • the crossbar 63 of the extension support 62 can be inserted between the fixed jaw 57 and the moving jaws 58 , where appropriate.
  • the top face of the extension support 62 i.e. the top faces of the crossbar 63 and of the side bars 64 , and also the top face of the fixed jaw S 7 and that of the abutment block 61 can be provided with ball bearings 69 that serve to support the metal sheet 2 for bending.

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Bending Of Plates, Rods, And Pipes (AREA)
US10/036,411 2001-01-08 2002-01-07 Sheet metal follower associated with a press for bending sheet metal Abandoned US20030097868A1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FR0100164 2001-01-08
FR0100164A FR2819202B1 (fr) 2001-01-08 2001-01-08 Accompagnateur de tole associe a une presse plieuse d'une tole

Publications (1)

Publication Number Publication Date
US20030097868A1 true US20030097868A1 (en) 2003-05-29

Family

ID=8858576

Family Applications (1)

Application Number Title Priority Date Filing Date
US10/036,411 Abandoned US20030097868A1 (en) 2001-01-08 2002-01-07 Sheet metal follower associated with a press for bending sheet metal

Country Status (5)

Country Link
US (1) US20030097868A1 (de)
EP (1) EP1221348B1 (de)
JP (1) JP2002248521A (de)
DE (1) DE60117510T2 (de)
FR (1) FR2819202B1 (de)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN106077334A (zh) * 2016-06-16 2016-11-09 安徽省恒胜机电工程股份有限公司 一种电梯门板自动折弯装置
CN113263485A (zh) * 2021-06-15 2021-08-17 南京巴兰登家具有限公司 一种木板加工定位夹紧装置

Families Citing this family (14)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP6148883B2 (ja) * 2013-03-14 2017-06-14 株式会社アマダホールディングス プレスブレーキ
KR101473733B1 (ko) 2013-11-08 2014-12-18 국방과학연구소 탑포일 절곡기
EP3056290A1 (de) * 2015-02-12 2016-08-17 Bogdan Kondracki Vorrichtung zur Automatisierung des Verfahrens zum Biegen von Werkstücken aus Metallblech für eine Biegepresse
CN107952838B (zh) * 2017-11-17 2023-10-17 昆山万马五金有限公司 一种金属加工防位移折弯装置
CN108465717A (zh) * 2018-05-15 2018-08-31 潘江匹 一种全自动钣金折弯机
CN109158454A (zh) * 2018-11-03 2019-01-08 南京金球数控机床股份有限公司 一种高强度高稳定性折弯机
EP3738688B1 (de) * 2019-05-15 2022-07-06 Nivora IP B.V. Vorrichtung zum abstützen eines bleches beim biegen in einer abkantpresse
CN110077446B (zh) * 2019-05-20 2024-03-29 中国科学技术大学 一种可移动的智能消防指示装置
JP7332366B2 (ja) * 2019-07-09 2023-08-23 コマツ産機株式会社 曲げ機械用の追従装置
JP7365920B2 (ja) 2020-01-28 2023-10-20 コマツ産機株式会社 曲げ機械用の追従装置
JP7365921B2 (ja) 2020-01-28 2023-10-20 コマツ産機株式会社 曲げ機械用の追従装置
CN111421024B (zh) * 2020-03-16 2021-08-10 南京邮电大学 基于复合驱动的随动托料装置及其运动学反解方法
CN111421023B (zh) * 2020-03-16 2021-07-09 南京邮电大学 二自由度金属板材折弯随动托料装置及其运动学反解方法
CN117483495B (zh) * 2023-12-29 2024-04-19 苏州兴齐钢结构工程有限公司 一种钢材折弯装置

Family Cites Families (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS59113932A (ja) * 1982-12-20 1984-06-30 Mitsubishi Electric Corp プレスブレ−キの材料支持装置
JPS59141323A (ja) * 1983-01-31 1984-08-14 Mitsubishi Electric Corp プレスブレ−キの材料支持装置
JPS59147716A (ja) * 1983-02-15 1984-08-24 Mitsubishi Electric Corp プレスブレ−キの材料支持装置
DE4126906A1 (de) * 1991-08-14 1993-02-18 Walter Kaercher Abkantpresse mit einer stuetzvorrichtung fuer das zu bearbeitende werkstueck
FR2683470B1 (fr) * 1991-11-13 1994-07-08 Capelle Michel Accompagnateur de tole pour presse-plieuse.

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN106077334A (zh) * 2016-06-16 2016-11-09 安徽省恒胜机电工程股份有限公司 一种电梯门板自动折弯装置
CN113263485A (zh) * 2021-06-15 2021-08-17 南京巴兰登家具有限公司 一种木板加工定位夹紧装置

Also Published As

Publication number Publication date
DE60117510T2 (de) 2006-11-09
FR2819202B1 (fr) 2003-04-18
EP1221348A1 (de) 2002-07-10
EP1221348B1 (de) 2006-03-01
DE60117510D1 (de) 2006-04-27
FR2819202A1 (fr) 2002-07-12
JP2002248521A (ja) 2002-09-03

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AS Assignment

Owner name: AMADA EUROPE, FRANCE

Free format text: ASSIGNMENT OF ASSIGNORS INTEREST;ASSIGNORS:MATSUDA, MORIKATSU;QUESNEL, GERARD;REEL/FRAME:012437/0466

Effective date: 20011226

STCB Information on status: application discontinuation

Free format text: ABANDONED -- FAILURE TO RESPOND TO AN OFFICE ACTION