US20070186602A1 - Process and pneumatic device for detecting the bending angle of a plate sheet in a bending press - Google Patents
Process and pneumatic device for detecting the bending angle of a plate sheet in a bending press Download PDFInfo
- Publication number
- US20070186602A1 US20070186602A1 US10/588,904 US58890405A US2007186602A1 US 20070186602 A1 US20070186602 A1 US 20070186602A1 US 58890405 A US58890405 A US 58890405A US 2007186602 A1 US2007186602 A1 US 2007186602A1
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- US
- United States
- Prior art keywords
- orifices
- bending
- pressure
- matrix die
- compressed air
- 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
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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
- B21D5/0209—Tools therefor
-
- 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
- B21D5/006—Bending sheet metal along straight lines, e.g. to form simple curves combined with measuring of bends
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01B—MEASURING LENGTH, THICKNESS OR SIMILAR LINEAR DIMENSIONS; MEASURING ANGLES; MEASURING AREAS; MEASURING IRREGULARITIES OF SURFACES OR CONTOURS
- G01B13/00—Measuring arrangements characterised by the use of fluids
- G01B13/18—Measuring arrangements characterised by the use of fluids for measuring angles or tapers; for testing the alignment of axes
Definitions
- the present invention deals with a process and a pneumatic device for detecting the bending angle of a plate sheet in a bending press.
- bending presses can have different construction variations.
- the most widespread ones are composed of a moving table supporting a punch and a fixed table supporting a matrix die.
- the moving table can translate in a vertical plane along two risers on which two hydraulic cylinders are assembled for this movements.
- Matrix die and punch have different shapes depending on the bending angle that has to be obtained, and therefore are both or only one of them interchangeable, provided that they are compatible.
- the plate sheet is rested onto the matrix die and the punch drops over it.
- One of the major problems of bending presses is verifying, at the end of the bending step, the bending angle and in particular whether such angle coincides with the desired angle.
- the elastic plate return can be determined with difficulty, since it depends on three major variable factors:
- the fork heads or bits are adapted to be arranged in contact with the sheet plate.
- the two elastically yielding forks are connected on their lower side to a related position transducer that communicates with a logical data processing unit that manages the bending press.
- Another system for detecting the bending angle is the one manufactured by the Belgian Company LVD that provides for a moving arm, placed beside the matrix die, which, supported by two linkages, and during the bending stage, arranges sensor means in contact with one of the two wings of the diverging plate.
- the sensor means are coaxially moving with respect to such arm and provide detection data to the bending press logical unit.
- the fork movement can be constrained by the presence of dirt or metallic debris that can always be found in environments where metals are worked.
- the optical system provides for at least one source of a light beam that is used for projecting two spots or a linear segment onto part of the sheet to be controlled.
- the bending angle is given by the distance between the projected spots, the known beam incidence angles, and the known distance between detection planes.
- the passing channels of the two light beams create a punch weakening; moreover, such channels can be easily occluded by debris or impurities that can be found on the plates thereby impairing their reading or making it unreliable.
- EP 1083403 It also known from patent EP 1083403 a method and device for detecting the bending angle of a plate.
- EP 1083403 shows a bending die having orifices in the face and slot side. In order to detect the bending angle, the pressure difference in an orifice is measured. With the help of tables, formulas, etc the value of the pressure difference is transferred in a value of an angle.
- Object of the present invention is ensuring the bending angle determination with a system that is able to avoid any occlusion or reading obstacle.
- FIG. 1 schematically shows the present device applied to a matrix die of a bending press before starting the bending step
- FIG. 2 shows the device in FIG. 1 in an intermediate bending step
- FIG. 3 shows the device in FIG. 1 in a final bending step
- FIG. 4 shows, in a block diagram form, a preferred embodiment of the measuring system with auxiliary devices that increase its accuracy.
- reference 1 designates a matrix of a bending press in a cross section
- reference 10 designates the matrix die slot.
- the punch 2 is provided over the matrix die, while reference 3 designates a plate sheet that has to be bent along a desired line and that must reach a certain bending angle.
- Each pair comprises a first orifice 5 and a second orifice 6 , which are supplied through respective channels 7 and 8 obtained in the matrix die body, through a compressed air system.
- the compressed air system whose line 9 is shown, provides for a precision pressure reducer RP that always keeps the pressure constant at a pre-set value, with a symmetrical and balanced piping system, adapted to sent the same air flow rate to the four orifices when they are completely open.
- a pressure detector is inserted, which transmits its own signal to a signal transducer which is able to communicate with a data processing unit that is able to process the position assumed by the plate, and therefore the plate bending angle, every time during its bending and particularly till the punch ceases its action and goes away from the matrix die, while the plate elastically returns to its final bending angle.
- the orifices location is preferably the shown one and more precisely the first orifice 5 , called external orifice, is vertically arranged along a perpendicular direction to the plate sheet before its bending and is substantially on the plane matrix die surface next to the slot.
- the second orifice 6 is arranged perpendicularly to the slot face and exits onto this face at a certain distance from the first orifice.
- the two orifices therefore are on two surfaces that get in contact with the plate at different times when the plate is bent with its maximum possible angle.
- the plate sheet As shown in FIG. 1 , the plate sheet, at the beginning of the pressing cycle, completely clogs the orifice 5 and the detected pressure will be maximum, while the orifice 6 will be completely free with a minimum pressure, since air will be able to freely go out to the outside environment.
- the orifice 5 When starting the pressing step, see FIG. 2 , the orifice 5 will start to be freed while the orifice 6 will start to close due to the plate bending.
- the pressure detectors are not of the absolute type, but of the differential type, and detect the pressure difference that occurs in the duct going to the internal orifices with respect to the ducts going to the external orifices.
- the plate bending angle measure must take into account both angles against which the plate rests on the two matrix die edges.
- two separate differential pressure transducers can be used, one for each matrix die edge, and their signals can be processed in a combined way.
- the same ducts that mutually connect the external orifices and that mutually connect the internal orifices inside the matrix die pneumatically realise the mean of measures of the two angles, based on symmetry, and therefore a single differential pressure sensor is used.
- the angle measure can be obtained by measuring the detected pressure difference, through a calibration table that compensates for the unavoidable system lack of linearity, and takes into account the dependence on the supply air pressure.
- a compensating device 12 is added, composed of a pair of symmetrical orifices 13 with a shutter 14 connected to a servo-positioning device 15 adapted to progressively change the air passage section of the two orifices along opposite directions, in a way that is quite similar to what occurs on the matrix die edge when bending the plate.
- the servo-positioning device is controlled by the pressure difference detected by the differential pressure sensor TDP, it moves since it is taken to zero, since the air passage section difference in matrix die orifices is perfectly compensated by the section difference of compensating device orifices.
- the plate angle is bi-univocally related to the position reached by the shutter, which can be very accurately detected through various systems known per se.
- the position is detected with an absolute encoder, not shown in the figures, and connected to the numeric press control.
- the numeric control After an initial calibration, for example performed with calibrated dihedral angles placed on the matrix die, the numeric control builds a table from which it obtains, at any time, the plate bending angle, starting from the shutter position, or vice versa.
- the residual error due to differential sensor zero drift can be detected and compensated by the system upon every bending cycle, by simply shutting off the common compressed air supply and by taking into account the residual value provided by the sensor.
- the immediate measure of angle variations can be obtained, due to the plate thickness differences and the elastic return, by measuring pressure variations provided by the differential pressure sensor TDP around the zero value.
- a punch tool UP which can replace the matrix die tool UM, is alternatively connected with dashed lines as device for detecting the bending angle.
- the parameter to be verified could be the compressed air outflow rate, such rate value changing depending on orifice clogging by the plate sheet.
- a single pressure measuring system can be used with different pairs of orifices obtained in different matrix dies or punches, by every time selecting solenoid valves on respective pneumatic supply ducts.
Abstract
The invention refers to the field of bending presses for plate sheets and more precisely it refers to a process and a device for detecting the bending angle in real time when the press punch operates on the sheet placed above the matrix die. The process provides for the generation of at least two flows of compressed air in at least two matrix die points that are totally or partially covered by the plate sheet. The pressure variation during the bending step is measured and such variation is compared with sample pressure values. The device provides for a compressed air system with a pressure reducer that supplies four orifices and a servo-controlled device that performs a compensation.
Description
- The present invention deals with a process and a pneumatic device for detecting the bending angle of a plate sheet in a bending press.
- As known, bending presses can have different construction variations. The most widespread ones are composed of a moving table supporting a punch and a fixed table supporting a matrix die.
- The moving table can translate in a vertical plane along two risers on which two hydraulic cylinders are assembled for this movements.
- Matrix die and punch have different shapes depending on the bending angle that has to be obtained, and therefore are both or only one of them interchangeable, provided that they are compatible.
- The plate sheet is rested onto the matrix die and the punch drops over it.
- One of the major problems of bending presses is verifying, at the end of the bending step, the bending angle and in particular whether such angle coincides with the desired angle.
- In fact, it is known that the plate dose not keep the angle imprinted by punch and matrix die due to the elastic return of the plate itself.
- The elastic plate return can be determined with difficulty, since it depends on three major variable factors:
-
- plate thickness, which is not constant in all plate sheet points;
- material of which the plate is composed;
- lamination direction of the plate sheet.
- Such factors can change for the same sheets and for the same workings, so that it is necessary, for every bend plate sheet, to verify whether the bending angle coincides with the desired angle and possibly intervene with a new pressing action.
- Several systems, of the mechanical and of the optical type, are already known for detecting the bending angle, and the most accurate ones provide for carrying out the measure on four points.
- The mechanical system disclosed, for example, in U.S. Pat. No. 4,131,008, IT-A-1293374, IT-A-1294147, provide for feeler means to detect the bending angle on the plate intrados or extrados, composed of one or two elastically yielding and independent forks.
- In case of two forks, they can be placed one inside the other or side by side.
- The fork heads or bits are adapted to be arranged in contact with the sheet plate.
- The two elastically yielding forks are connected on their lower side to a related position transducer that communicates with a logical data processing unit that manages the bending press.
- Another system of the mechanical type is disclosed in DE-A-10006512 in which, for detecting the bending angle, two levers are used with their fulcrum onto the matrix die and which, through their rotation movement, operate on a signal transducer.
- Another system for detecting the bending angle is the one manufactured by the Belgian Company LVD that provides for a moving arm, placed beside the matrix die, which, supported by two linkages, and during the bending stage, arranges sensor means in contact with one of the two wings of the diverging plate.
- The sensor means are coaxially moving with respect to such arm and provide detection data to the bending press logical unit.
- These mechanical system have the inconvenience that they cannot be applied to all types of matrix dies, in particular matrix dies with narrow slots, since physically there is no room for inserting the forks.
- Moreover, the fork movement can be constrained by the presence of dirt or metallic debris that can always be found in environments where metals are worked.
- The optical system, see WO-A-01/28706, provides for at least one source of a light beam that is used for projecting two spots or a linear segment onto part of the sheet to be controlled.
- The bending angle is given by the distance between the projected spots, the known beam incidence angles, and the known distance between detection planes.
- The passing channels of the two light beams create a punch weakening; moreover, such channels can be easily occluded by debris or impurities that can be found on the plates thereby impairing their reading or making it unreliable.
- It also known from patent EP 1083403 a method and device for detecting the bending angle of a plate. EP 1083403 shows a bending die having orifices in the face and slot side. In order to detect the bending angle, the pressure difference in an orifice is measured. With the help of tables, formulas, etc the value of the pressure difference is transferred in a value of an angle.
- Object of the present invention is ensuring the bending angle determination with a system that is able to avoid any occlusion or reading obstacle.
- These and other objects are all obtained by the process and the device of the present invention, that is characterised by what is provided in the enclosed claims.
- These and other characteristics will be better pointed out by the following description of some embodiments shown, merely as a non-limiting example, in the enclosed tables of drawing, in which:
-
FIG. 1 schematically shows the present device applied to a matrix die of a bending press before starting the bending step; -
FIG. 2 shows the device inFIG. 1 in an intermediate bending step; -
FIG. 3 shows the device inFIG. 1 in a final bending step; -
FIG. 4 shows, in a block diagram form, a preferred embodiment of the measuring system with auxiliary devices that increase its accuracy. - With reference to
FIG. 1 ,reference 1 designates a matrix of a bending press in a cross section, andreference 10 designates the matrix die slot. - The
punch 2 is provided over the matrix die, whilereference 3 designates a plate sheet that has to be bent along a desired line and that must reach a certain bending angle. - Two pairs of orifices, symmetrically arranged with respect to the vertical
pressing axis 4, can be noted in this matrix die section. - Each pair comprises a
first orifice 5 and asecond orifice 6, which are supplied throughrespective channels 7 and 8 obtained in the matrix die body, through a compressed air system. - The compressed air system, whose line 9 is shown, provides for a precision pressure reducer RP that always keeps the pressure constant at a pre-set value, with a symmetrical and balanced piping system, adapted to sent the same air flow rate to the four orifices when they are completely open.
- In the most general case, on each line a pressure detector is inserted, which transmits its own signal to a signal transducer which is able to communicate with a data processing unit that is able to process the position assumed by the plate, and therefore the plate bending angle, every time during its bending and particularly till the punch ceases its action and goes away from the matrix die, while the plate elastically returns to its final bending angle.
- The orifices location is preferably the shown one and more precisely the
first orifice 5, called external orifice, is vertically arranged along a perpendicular direction to the plate sheet before its bending and is substantially on the plane matrix die surface next to the slot. - The
second orifice 6, called internal orifice, is arranged perpendicularly to the slot face and exits onto this face at a certain distance from the first orifice. - The two orifices therefore are on two surfaces that get in contact with the plate at different times when the plate is bent with its maximum possible angle.
- As shown in
FIG. 1 , the plate sheet, at the beginning of the pressing cycle, completely clogs theorifice 5 and the detected pressure will be maximum, while theorifice 6 will be completely free with a minimum pressure, since air will be able to freely go out to the outside environment. When starting the pressing step, seeFIG. 2 , theorifice 5 will start to be freed while theorifice 6 will start to close due to the plate bending. - In the final step,
FIG. 3 , theorifice 5 will be completely free while theorifice 6 will be totally or partially closed. - In a preferred embodiment, the pressure detectors are not of the absolute type, but of the differential type, and detect the pressure difference that occurs in the duct going to the internal orifices with respect to the ducts going to the external orifices.
- During the elastic return step, the plate bending angle measure must take into account both angles against which the plate rests on the two matrix die edges.
- In order to do this, two separate differential pressure transducers can be used, one for each matrix die edge, and their signals can be processed in a combined way.
- In the preferred embodiment being shown, the same ducts that mutually connect the external orifices and that mutually connect the internal orifices inside the matrix die, pneumatically realise the mean of measures of the two angles, based on symmetry, and therefore a single differential pressure sensor is used.
- The angle measure can be obtained by measuring the detected pressure difference, through a calibration table that compensates for the unavoidable system lack of linearity, and takes into account the dependence on the supply air pressure.
- In a preferred system implementation, by modifying the pneumatic circuit as shown in
FIG. 4 , it is possible to avoid main measuring errors, due to the pressure reduced inaccuracy and the pressure sensor scale errors. - Branching from the two ducts connected to the differential pressure sensor TDP supplied by a pressure regulating unit RP, a compensating
device 12 is added, composed of a pair ofsymmetrical orifices 13 with ashutter 14 connected to a servo-positioning device 15 adapted to progressively change the air passage section of the two orifices along opposite directions, in a way that is quite similar to what occurs on the matrix die edge when bending the plate. - If the servo-positioning device is controlled by the pressure difference detected by the differential pressure sensor TDP, it moves since it is taken to zero, since the air passage section difference in matrix die orifices is perfectly compensated by the section difference of compensating device orifices.
- In this way, the plate angle is bi-univocally related to the position reached by the shutter, which can be very accurately detected through various systems known per se.
- In the described example, the position is detected with an absolute encoder, not shown in the figures, and connected to the numeric press control.
- After an initial calibration, for example performed with calibrated dihedral angles placed on the matrix die, the numeric control builds a table from which it obtains, at any time, the plate bending angle, starting from the shutter position, or vice versa.
- It can be noted that the residual error due to differential sensor zero drift can be detected and compensated by the system upon every bending cycle, by simply shutting off the common compressed air supply and by taking into account the residual value provided by the sensor.
- If, instead, the shutter is kept in a fixed position, corresponding to the minimum angle reached at the end of bending, the immediate measure of angle variations can be obtained, due to the plate thickness differences and the elastic return, by measuring pressure variations provided by the differential pressure sensor TDP around the zero value.
- Such application is feasible both by using a matrix die as tool in a machine or alternatively a punch; in
FIG. 4 , a punch tool UP, which can replace the matrix die tool UM, is alternatively connected with dashed lines as device for detecting the bending angle. - The description made an explicit reference to controlling pressures in orifices, but, according to a possible variation, the parameter to be verified could be the compressed air outflow rate, such rate value changing depending on orifice clogging by the plate sheet.
- A single pressure measuring system can be used with different pairs of orifices obtained in different matrix dies or punches, by every time selecting solenoid valves on respective pneumatic supply ducts.
Claims (11)
1-11. (canceled)
12. Process for detecting the bending angle of a plate sheet that has been bent along a bending line, comprising the following step:
generating at least two flows of compressed air in two matrix die points that are totally or partially covered by the plate sheet during its bending step;
measuring the pressure variation between the two flows of compressed air during said bending step;
processing the measured pressure values and comparing then with predetermined sample values through calibration.
13. Process according to claim 12 , characterised in that it comprises: a first flow of compressed air that is directed perpendicular to the plate sheet before its bending and is placed on the matrix die next to the plane sheet-bearing surface next to the matrix die groove; a second flow directed perpendicular to the slot surface.
14. Process according to claim 12 , characterised in that it provides for measuring the pressure of a pair of compressed air flows on both slot faces.
15. Process according to claim 12 , characterised in that the pressure measure between the two air flows is performed with a pressure transducer of the differential type, connected to the two pneumatic supply ducts of a pair of orifices on the matrix die.
16. Process according to claim 12 , characterised in that the pressure difference between the two air flows can be kept constant at a zero value, by means of a servo-controlled device comprising two orifices and a shutter, which is able to externally compensate for the covering differences of orifices on the matrix die generated by the plate abutment, and characterised in that the angle measure is referred to the position measure of the external compensating device.
17. Process according to claim 12 , characterised in that, in order to more easily detect the small variations with respect to a provided bending angle, the servo-controlled device is kept in a position corresponding to the provided angle and the pressure difference is measured, provided by the transducer around the zero value.
18. Process according to claim 12 , characterised in that the common compressed air supply line is periodically shut off to allow compensating for differential pressure sensor zero errors.
19. Process according to claim 12 , characterised in that a single pressure measuring system can be used with different pairs of orifices obtained in different matrix dies, by selecting every time the pairs of orifices, by means of solenoid valves on respective pneumatic supply ducts.
20. Process according to claim 12 , characterised in that the pair of orifices for measuring the bending angle is obtained on the punch.
21. Device for measuring the bending angle comprising a compressed air system on whose supply line it provides a system pressure reducer; two pairs of orifices arranged on the matrix die face that get in contact with the plate sheet in symmetrical positions with respect to the vertical axis of the matrix die groove apex, each one of said orifices being supplied by a respective flow of compressed air, characterised in that the mean of measures of plate bearing angles onto the matrix die is performed by mutually pneumatically connecting the two orifices which are external to the matrix die slot and the two orifices which are internal to the slot itself.
Applications Claiming Priority (3)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
IT000010A ITPR20040010A1 (en) | 2004-02-18 | 2004-02-18 | PROCEDURE AND PNEUMATIC DEVICE FOR DETECTING THE BENDING ANGLE OF A SHEET OF SHEET IN A FOLDING PRESS. |
ITPR2004A000010 | 2004-02-18 | ||
PCT/EP2005/000690 WO2005077559A1 (en) | 2004-02-18 | 2005-01-25 | Process and pneumatic device for detecting the bending angle of a plate sheet in a bending press |
Publications (1)
Publication Number | Publication Date |
---|---|
US20070186602A1 true US20070186602A1 (en) | 2007-08-16 |
Family
ID=34856956
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
US10/588,904 Abandoned US20070186602A1 (en) | 2004-02-18 | 2005-01-25 | Process and pneumatic device for detecting the bending angle of a plate sheet in a bending press |
Country Status (7)
Country | Link |
---|---|
US (1) | US20070186602A1 (en) |
EP (1) | EP1715968B1 (en) |
JP (1) | JP2007522944A (en) |
AT (1) | ATE508812T1 (en) |
ES (1) | ES2366566T3 (en) |
IT (1) | ITPR20040010A1 (en) |
WO (1) | WO2005077559A1 (en) |
Cited By (7)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US20090293576A1 (en) * | 2004-11-17 | 2009-12-03 | Amada Company, Limited | Bending method, and die and bending machine used for the bending method |
US20130047416A1 (en) * | 2011-08-22 | 2013-02-28 | Wei-Ming Sim | Method of manufacturing an elongate component |
CN103389063A (en) * | 2013-08-12 | 2013-11-13 | 南京埃斯顿自动化股份有限公司 | Device for automatically measuring bending angle of bending machine by adopting pipeline pressure |
CN112718942A (en) * | 2020-12-08 | 2021-04-30 | 江苏弘东工业自动化有限公司 | Bending angle correction method for bending machine |
US10996150B2 (en) * | 2017-06-29 | 2021-05-04 | Lg Chem, Ltd. | Jig assembly comprising bending jig and apparatus and method for measuring bending tensile strength using the same |
CN114526696A (en) * | 2022-04-22 | 2022-05-24 | 南通亚元新材料有限公司 | Angle rapid detection tool for production quality detection of metal material component |
CN116329400A (en) * | 2023-03-28 | 2023-06-27 | 江苏振世达汽车模具有限公司 | New energy automobile sheet metal outer covering tensile mould insert oblique piece structure |
Families Citing this family (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
AT516146B1 (en) * | 2014-09-15 | 2016-03-15 | Trumpf Maschinen Austria Gmbh | Calibration method for a bending machine |
CN107243526A (en) * | 2016-07-21 | 2017-10-13 | 深圳市海盾五金工具有限公司 | A kind of bending apparatus of the power equipment part of intelligent control |
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US5099666A (en) * | 1989-11-14 | 1992-03-31 | Amada Company, Limited | Method and device for detecting folding angles of a metal sheet during folding |
US6553803B1 (en) * | 1999-09-08 | 2003-04-29 | Bystronic Laser Ag | Method and an apparatus for determining the bending angle of a work piece to be bent |
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IT1072273B (en) | 1977-02-01 | 1985-04-10 | Selecontrol Sas | DEVICE FOR THE DETECTION AND ADJUSTMENT OF BENDING ANGLES PARTICULARLY SUITABLE FOR PRESSES-FOLDERS |
IT1294147B1 (en) | 1997-07-25 | 1999-03-22 | Luciano Gasparini | Metal sheet press-bending machine - has feelers to measure respective bending of metal sheet on bending groove and uses logic unit to control bending process |
IT1293374B1 (en) | 1997-06-20 | 1999-02-25 | Luciano Gasparini | Metal sheet press-bending machine - has feelers to measure respective bending of metal sheet on bending groove and uses logic unit to control bending process |
NL1013378C2 (en) | 1999-10-22 | 2001-04-24 | Best Quality B V | Apparatus and method for determining a bending angle of a plate and its use for setting plates. |
DE10006512C2 (en) | 2000-02-15 | 2002-07-18 | Colgar Spa | Device for a press brake for measuring the bending angle on the workpiece |
-
2004
- 2004-02-18 IT IT000010A patent/ITPR20040010A1/en unknown
-
2005
- 2005-01-25 WO PCT/EP2005/000690 patent/WO2005077559A1/en not_active Application Discontinuation
- 2005-01-25 ES ES05706997T patent/ES2366566T3/en active Active
- 2005-01-25 AT AT05706997T patent/ATE508812T1/en not_active IP Right Cessation
- 2005-01-25 US US10/588,904 patent/US20070186602A1/en not_active Abandoned
- 2005-01-25 JP JP2006553469A patent/JP2007522944A/en active Pending
- 2005-01-25 EP EP05706997A patent/EP1715968B1/en not_active Not-in-force
Patent Citations (2)
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US5099666A (en) * | 1989-11-14 | 1992-03-31 | Amada Company, Limited | Method and device for detecting folding angles of a metal sheet during folding |
US6553803B1 (en) * | 1999-09-08 | 2003-04-29 | Bystronic Laser Ag | Method and an apparatus for determining the bending angle of a work piece to be bent |
Cited By (9)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US20090293576A1 (en) * | 2004-11-17 | 2009-12-03 | Amada Company, Limited | Bending method, and die and bending machine used for the bending method |
US8534105B2 (en) * | 2004-11-17 | 2013-09-17 | Amada Company, Limited | Bending method, and die and bending machine used for the bending method |
US20130047416A1 (en) * | 2011-08-22 | 2013-02-28 | Wei-Ming Sim | Method of manufacturing an elongate component |
US9201417B2 (en) * | 2011-08-22 | 2015-12-01 | Airbus Operations Limited | Method of manufacturing an elongate component |
CN103389063A (en) * | 2013-08-12 | 2013-11-13 | 南京埃斯顿自动化股份有限公司 | Device for automatically measuring bending angle of bending machine by adopting pipeline pressure |
US10996150B2 (en) * | 2017-06-29 | 2021-05-04 | Lg Chem, Ltd. | Jig assembly comprising bending jig and apparatus and method for measuring bending tensile strength using the same |
CN112718942A (en) * | 2020-12-08 | 2021-04-30 | 江苏弘东工业自动化有限公司 | Bending angle correction method for bending machine |
CN114526696A (en) * | 2022-04-22 | 2022-05-24 | 南通亚元新材料有限公司 | Angle rapid detection tool for production quality detection of metal material component |
CN116329400A (en) * | 2023-03-28 | 2023-06-27 | 江苏振世达汽车模具有限公司 | New energy automobile sheet metal outer covering tensile mould insert oblique piece structure |
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ITPR20040010A1 (en) | 2004-05-18 |
EP1715968B1 (en) | 2011-05-11 |
ATE508812T1 (en) | 2011-05-15 |
EP1715968A1 (en) | 2006-11-02 |
ES2366566T3 (en) | 2011-10-21 |
WO2005077559A1 (en) | 2005-08-25 |
JP2007522944A (en) | 2007-08-16 |
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