EP0542610A1 - Hebestütze für eine Blechbiegemaschine - Google Patents

Hebestütze für eine Blechbiegemaschine Download PDF

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Publication number
EP0542610A1
EP0542610A1 EP92403015A EP92403015A EP0542610A1 EP 0542610 A1 EP0542610 A1 EP 0542610A1 EP 92403015 A EP92403015 A EP 92403015A EP 92403015 A EP92403015 A EP 92403015A EP 0542610 A1 EP0542610 A1 EP 0542610A1
Authority
EP
European Patent Office
Prior art keywords
support
sheet
press
movement
rotation
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
EP92403015A
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English (en)
French (fr)
Other versions
EP0542610B1 (de
Inventor
Michel Capelle
Jean Paul Henri Treillet
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
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Filing date
Publication date
Application filed by Amada Europe SA filed Critical Amada Europe SA
Publication of EP0542610A1 publication Critical patent/EP0542610A1/de
Application granted granted Critical
Publication of EP0542610B1 publication Critical patent/EP0542610B1/de
Anticipated expiration legal-status Critical
Expired - Lifetime 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
    • B21D43/00—Feeding, positioning or storing devices combined with, or arranged in, or specially adapted for use in connection with, apparatus for working or processing sheet metal, metal tubes or metal profiles; Associations therewith of cutting devices
    • B21D43/02—Advancing work in relation to the stroke of the die or tool
    • B21D43/04—Advancing work in relation to the stroke of the die or tool by means in mechanical engagement with the work
    • B21D43/10—Advancing work in relation to the stroke of the die or tool by means in mechanical engagement with the work by grippers
    • B21D43/105—Manipulators, i.e. mechanical arms carrying a gripper element having several degrees of freedom
    • 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
    • B21D43/00—Feeding, positioning or storing devices combined with, or arranged in, or specially adapted for use in connection with, apparatus for working or processing sheet metal, metal tubes or metal profiles; Associations therewith of cutting devices
    • B21D43/02—Advancing work in relation to the stroke of the die or tool
    • B21D43/04—Advancing work in relation to the stroke of the die or tool by means in mechanical engagement with the work
    • B21D43/14—Advancing work in relation to the stroke of the die or tool by means in mechanical engagement with the work by turning devices, e.g. turn-tables
    • B21D43/145—Turnover devices, i.e. by turning about a substantially horizontal axis
    • 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 subject of the present invention is an apparatus accompanying the sheet during folding on a press brake.
  • the sheet is pinched between an elongated punch called a counter-vee, fixed to the upper apron and a matrix of the same length in shape. of vee fixed to the lower apron.
  • the bringing together of these two tools causes a bending of the sheet between the two edges of the vee then a permanent deformation which constitutes the fold to be produced according to the desired angle.
  • the device which is the subject of the present invention is a sheet metal guide comprising a pivoting support actuated by one or more articulated systems, each of them consisting of at least two levers and two links forming with the support, at least two deformable parallelograms with like a pantograph; characterized in that the fixed points of articulation of the two levers on the one hand and the points of articulation of the two links on the other hand form two straight lines which meet on the axis of rotation of the sheet around the die edge.
  • the support rotation control is obtained by a “master-slave” type servo between the movable press deck and the support, having the effect of minimizing the error in accompanying the sheet during bending.
  • the output signal from the servo device acts indifferently on a linear cylinder without defined orientation or on a rotary motor.
  • the sheet being made integral with the support, the latter is connected to the articulated system by an elastic connection in order to follow the slight sliding of the sheet during folding.
  • Figure 1 shows in front and side views, a press brake during folding and the formation of the counter-fold on a large sheet.
  • Figure 2 is a schematic enlargement of the folding area
  • Figure 3 is a side view of the front of the press equipped with the sheet metal guide according to the invention.
  • FIG. 4 is the block diagram of an electronic control system of the "master-slave" type adapted to the attendant.
  • Figure 5 is a top view of a sheet metal guide consisting of two mechanically synchronized arms.
  • FIG. 6 represents the two independent arms each slaved as a "master-slave" to the nearest press cylinder.
  • Figure 7 is a top view of a sheet metal support tray.
  • Figure 8 shows a detail of the articulation of an actuating rod on the support.
  • the press brake consists essentially of a frame (1), an upper deck carrying a punch (2) and a lower deck carrying a die (3) generally in the form of vee.
  • One of the two aprons is movable, which brings the tools closer together and the sheet metal (5) folds together, as shown in FIGS. 2 and 3. If the sheet has a large dimension in front of the press and is not not supported, it flexes and forms during folding a counter-fold (26) resulting from the "whiplash" caused by its acceleration at the start of folding and the moment created by its weight.
  • the operating principle of the guide as described in Figure 3 is similar to that of the pantograph.
  • the fixed points (7) and (8) integral with the frame (20) of the device are aligned with the edge of the die (4); around these fixed points can pivot two levers (9) and (10), the lever (9) has two points of articulation (11) and (12); the lever (10) has a point of articulation (13) and a light (14).
  • a link (15) connecting the articulation points (11) and (13) is articulated at (16) on the support (6) while a second link (17) connects the point (12) of the lever (9) at a second articulation point (18) of the support (6).
  • Points (16) and (18) are aligned with the edge of the matrix (4) .
  • the two parallelograms formed by the points (7), (8) (13a), (11a) on the one hand and (11a), (12a) (18a), (16a) on the other hand can deform to take the respective positions (7), (8), (13b), (11b) and (11b), (12b), (18b), (16b) so that the points (18b), (16b) integral with the support (6) always remain aligned with the vee edge and at constant distance from this edge when the levers (9) and (10) are rotated by any angle ⁇ .
  • the rotation of the lever (9), therefore of the lever (10) which remains parallel to it, is obtained by a jack (19) articulated in (4) and the rod of which is connected in ( 11) to the lever (9) and to the link (15).
  • This jack can be hydraulic, as shown in the figure, electric or pneumatic. In all cases, it is controlled by a power member, not shown but which, in the example described, comprises a hydraulic distributor delivering to the jack an oil flow proportional to an electrical set point; this being determined by the servo system so that the angle ⁇ of rotation of the support (6) is constantly equal to the angle ⁇ of rotation of the sheet at the same time during folding.
  • the guide is electrically connected to the press, which has either original or in addition an incremental measurement rule (21) whose cursor (22) indicates the position and the speed of the movable platform. (23) .At the same time, the guide is equipped with an incremental ruler (24) whose dimension is related to the angular movement of the lever (10). This ruler (24) has a cursor (25) guided on the ruler and controlled by the lever (10) using a sliding connection represented by the light (14).
  • the rule (24) is mounted on the frame (20) in position perpendicular to the lever (10) when it is We can see that the displacement of the cursor from (25a) to (25b) is proportional to that of the cursor (22) of the press since it measures the penetration of the punch in the matrix and that, geometrically, the triangle formed by points (25a), (25b), (8) is similar to that formed by the top of the punch, in s initial (27a) and final (27b) positions and the matrix edge (4) shown in FIG. 2.
  • the consistency of the values read from the two sensors is purely mechanical
  • the servo principle is described in the diagram in FIG. 4.
  • the adapters (44) and (45) process the signals complemented by the sliders (22) and (25) in order to obtain, on an output, a counting signal. positive if the cursor moves in the fold direction and, on another output, a negative count signal if the cursor moves in the opposite direction.
  • the frequency-voltage converter (46) outputs a setpoint voltage proportional to the counting frequency of the adapter (44), positive if the counting is positive and negative otherwise.
  • the member for preselecting the folding vee (47) outputs a division ratio corresponding to the matrix chosen from an interface of the coding wheel type or the like.
  • the division block (48) receives the counting signals from the adapter (45) and outputs a quantity of pulses proportional to the division ratio of the preselection member (47).
  • the counting signals coming from the adapter (44) and the division block (48) are transmitted to the block (49) which outputs a signed digital value representative of the chase error of the attendant relative to the movable platform.
  • the converter (50) transforms this digital value into analog voltage.
  • the setpoint voltages leaving the converter (46) and the converter (50) enter a PID block (51) (proportional, integral and differential) to generate, in output, a control signal from the power unit.
  • the sheet metal guide can take various forms and three examples of embodiment are given in FIGS. 5, 6 and 7.
  • each articulated system has its own support arm (32), (33), the arms can be separated according to the width of the sheet; they can therefore slide along the apron (34) of the press and find a place in the extension of this apron when not in use.
  • Their drive can be independent or common, for example by means of a splined shaft (35).
  • the two support arms are independent and each arm is slaved to the movement of the part of the deck located opposite it; in practice, the arm (32) is slaved to the jack (28) and the arm (33 ) to the cylinder (29); each control being assigned a coefficient proportional to the distance between the axis of the linear sensor of the press managing this cylinder and the axis of the linear sensor of the corresponding arm.
  • This arrangement makes it possible to accompany the sheet even when the fold is changing from one end to the other, as a result of a different adjustment of the two cylinders .
  • the support is a plate (36) driven by at least two articulated systems.
  • the device is made integral with the lower apron at precise horizontal and vertical distances depending on the width and height of the die. Most often, it can be moved along the lower apron of the press, as in Figure 3 using rollers (39a), (39b) rolling on a rail (30). Each arm will then have a locking system. The distance adjustment and the locking system are not shown in the figure . In order not to inadvertently slide on the support during folding, the sheet is held on it, for example using suction cups (40) or any other means such as electromagnets or clamps.
  • the device therefore comprises, according to FIG. 8, a possibility of longitudinal sliding between the support (6) and the connecting pins (16) and (18).
  • the yokes (41) on which are articulated the links (15), (17) are slidably mounted on the plate (6) and are connected to the latter by means of elastic elements such as the springs (42) and held by screws (43 ) .
  • this solution is given by way of example, and that the device can be adapted to the sliding of the sheet in another way such as for example a sliding mounting of the holding members on the plate.
  • the principle of the sheet metal guide according to the present invention can be used on all types of press brakes with upper or lower movable deck. Due to its simple servo-control, it can be installed on rustic press brakes having no no digital control.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Bending Of Plates, Rods, And Pipes (AREA)
  • Braking Arrangements (AREA)
  • Press Drives And Press Lines (AREA)
EP92403015A 1991-11-13 1992-11-09 Hebestütze für eine Blechbiegemaschine Expired - Lifetime EP0542610B1 (de)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FR9113952 1991-11-13
FR9113952A FR2683470B1 (fr) 1991-11-13 1991-11-13 Accompagnateur de tole pour presse-plieuse.

Publications (2)

Publication Number Publication Date
EP0542610A1 true EP0542610A1 (de) 1993-05-19
EP0542610B1 EP0542610B1 (de) 1997-08-27

Family

ID=9418859

Family Applications (1)

Application Number Title Priority Date Filing Date
EP92403015A Expired - Lifetime EP0542610B1 (de) 1991-11-13 1992-11-09 Hebestütze für eine Blechbiegemaschine

Country Status (6)

Country Link
EP (1) EP0542610B1 (de)
AT (1) ATE157286T1 (de)
DE (1) DE69221824T2 (de)
DK (1) DK0542610T3 (de)
ES (1) ES2108740T3 (de)
FR (1) FR2683470B1 (de)

Cited By (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP1221348A1 (de) * 2001-01-08 2002-07-10 Amada Europe Hebestütze für eine Blechbiegemaschine
FR2819436A1 (fr) * 2001-01-17 2002-07-19 Amada Europ Sa Accompagnateur de toles pour presse plieuse
FR2850592A1 (fr) * 2003-02-05 2004-08-06 Euratec Europ D Assistance Tec Dispositif de manipulation de piece
NL1027529C2 (nl) * 2004-11-17 2006-05-18 Safan Bv Pers.
CN102228918A (zh) * 2011-06-17 2011-11-02 无锡金球机械有限公司 随动跟踪托料装置
CN105170819A (zh) * 2015-09-28 2015-12-23 扬中中科维康智能科技有限公司 一种基于并联机构的大型数控板料折弯机随动托料系统
EP3056290A1 (de) * 2015-02-12 2016-08-17 Bogdan Kondracki Vorrichtung zur Automatisierung des Verfahrens zum Biegen von Werkstücken aus Metallblech für eine Biegepresse
CN106132579A (zh) * 2014-03-19 2016-11-16 特鲁普机械奥地利有限公司及两合公司 用于弯边压力机的弯曲辅助装置
WO2020047702A1 (zh) * 2018-09-03 2020-03-12 江苏亚威机床股份有限公司 一种折弯机用浮动折叠托料装置
CN111167891A (zh) * 2020-03-02 2020-05-19 爱克(苏州)机械有限公司 一种数控折弯机四连杆结构随动托料机构

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FI20041629A (fi) * 2004-12-20 2006-06-21 Janne Tapani Leinonen Ohutlevyn taivutusmenetelmä
KR102169593B1 (ko) * 2018-11-23 2020-10-23 경동산업(주) 증발기 냉각 코일의 이송 장치
EP3738688B1 (de) * 2019-05-15 2022-07-06 Nivora IP B.V. Vorrichtung zum abstützen eines bleches beim biegen in einer abkantpresse

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0325841A2 (de) * 1988-01-29 1989-08-02 Kabushiki Kaisha Shinwa Giken Stossabsorbierender Werkstückträger für Biegemaschinen

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5791825A (en) * 1980-12-01 1982-06-08 Amada Co Ltd Work follow-up device of press brake
JPS59147716A (ja) * 1983-02-15 1984-08-24 Mitsubishi Electric Corp プレスブレ−キの材料支持装置
JPS6064730A (ja) * 1983-09-06 1985-04-13 Amada Metoretsukusu:Kk プレスブレーキ
JPS6163318A (ja) * 1984-09-04 1986-04-01 Amada Metoretsukusu:Kk プレスブレ−キにおける板材支持取出方法および装置

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0325841A2 (de) * 1988-01-29 1989-08-02 Kabushiki Kaisha Shinwa Giken Stossabsorbierender Werkstückträger für Biegemaschinen

Non-Patent Citations (4)

* Cited by examiner, † Cited by third party
Title
PATENT ABSTRACTS OF JAPAN vol. 10, no. 227 (M-505)(2283) 7 Août 1986 & JP-A-61 063 318 ( AMADA ) 1 Avril 1986 *
PATENT ABSTRACTS OF JAPAN vol. 6, no. 184 (M-157)(1062) 21 Septembre 1982 & JP-A-57 091 825 ( AMADA K.K. ) 8 Juin 1982 *
PATENT ABSTRACTS OF JAPAN vol. 8, no. 276 (M-346)(1713) 18 Décembre 1984 & JP-A-59 147 716 ( MITSUBISHI DENKI K.K. ) 24 Août 1984 *
PATENT ABSTRACTS OF JAPAN vol. 9, no. 202 (M-405)(1925) 20 Août 1985 & JP-A-60 064 730 ( AMADA ) 13 Avril 1985 *

Cited By (16)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP1221348A1 (de) * 2001-01-08 2002-07-10 Amada Europe Hebestütze für eine Blechbiegemaschine
FR2819202A1 (fr) * 2001-01-08 2002-07-12 Amada Europ Sa Accompagnateur de tole associe a une presse plieuse d'une tole
FR2819436A1 (fr) * 2001-01-17 2002-07-19 Amada Europ Sa Accompagnateur de toles pour presse plieuse
EP1232811A1 (de) * 2001-01-17 2002-08-21 Amada Europe Hebestütze für eine Blechbiegemaschine
US6634204B2 (en) 2001-01-17 2003-10-21 Amada Europe Sheet metal follower for a bending press
FR2850592A1 (fr) * 2003-02-05 2004-08-06 Euratec Europ D Assistance Tec Dispositif de manipulation de piece
NL1027529C2 (nl) * 2004-11-17 2006-05-18 Safan Bv Pers.
CN102228918B (zh) * 2011-06-17 2013-05-29 无锡金球机械有限公司 随动跟踪托料装置
CN102228918A (zh) * 2011-06-17 2011-11-02 无锡金球机械有限公司 随动跟踪托料装置
CN106132579A (zh) * 2014-03-19 2016-11-16 特鲁普机械奥地利有限公司及两合公司 用于弯边压力机的弯曲辅助装置
CN106132579B (zh) * 2014-03-19 2018-11-02 特鲁普机械奥地利有限公司及两合公司 用于弯边压力机的弯曲辅助装置
US10363591B2 (en) 2014-03-19 2019-07-30 Trumpf Maschinen Austria Gmbh & Co. Kg. Bending aid for a press brake
EP3056290A1 (de) * 2015-02-12 2016-08-17 Bogdan Kondracki Vorrichtung zur Automatisierung des Verfahrens zum Biegen von Werkstücken aus Metallblech für eine Biegepresse
CN105170819A (zh) * 2015-09-28 2015-12-23 扬中中科维康智能科技有限公司 一种基于并联机构的大型数控板料折弯机随动托料系统
WO2020047702A1 (zh) * 2018-09-03 2020-03-12 江苏亚威机床股份有限公司 一种折弯机用浮动折叠托料装置
CN111167891A (zh) * 2020-03-02 2020-05-19 爱克(苏州)机械有限公司 一种数控折弯机四连杆结构随动托料机构

Also Published As

Publication number Publication date
EP0542610B1 (de) 1997-08-27
DE69221824T2 (de) 1998-03-26
ES2108740T3 (es) 1998-01-01
FR2683470B1 (fr) 1994-07-08
FR2683470A1 (fr) 1993-05-14
ATE157286T1 (de) 1997-09-15
DE69221824D1 (de) 1997-10-02
DK0542610T3 (da) 1998-03-30

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