EP2674232B1 - Presse-plieuse - Google Patents
Presse-plieuse Download PDFInfo
- Publication number
- EP2674232B1 EP2674232B1 EP12744487.5A EP12744487A EP2674232B1 EP 2674232 B1 EP2674232 B1 EP 2674232B1 EP 12744487 A EP12744487 A EP 12744487A EP 2674232 B1 EP2674232 B1 EP 2674232B1
- Authority
- EP
- European Patent Office
- Prior art keywords
- deflection
- punch
- die
- bending
- frame
- 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.)
- Active
Links
- 238000005452 bending Methods 0.000 title claims description 74
- 239000000463 material Substances 0.000 claims description 73
- 238000001514 detection method Methods 0.000 claims description 21
- 230000007246 mechanism Effects 0.000 claims description 18
- 238000006073 displacement reaction Methods 0.000 claims description 6
- 230000008878 coupling Effects 0.000 description 3
- 238000010168 coupling process Methods 0.000 description 3
- 238000005859 coupling reaction Methods 0.000 description 3
- 238000000034 method Methods 0.000 description 3
- 230000009467 reduction Effects 0.000 description 3
- 238000010586 diagram Methods 0.000 description 2
- 208000037805 labour Diseases 0.000 description 2
- 239000006185 dispersion Substances 0.000 description 1
- 230000006870 function Effects 0.000 description 1
- 238000012886 linear function Methods 0.000 description 1
- 230000008569 process Effects 0.000 description 1
- 238000009877 rendering Methods 0.000 description 1
Images
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
- B21D22/00—Shaping without cutting, by stamping, spinning, or deep-drawing
- B21D22/02—Stamping using rigid devices or tools
-
- 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
- B21D5/004—Bending sheet metal along straight lines, e.g. to form simple curves with program control
-
- 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
- B21D5/0272—Deflection compensating means
Definitions
- the present invention relates to a bending machine for bending sheet materials, according to the preamble of claim 1, and especially, relates to a bending machine that requires no trial bending.
- Patent Document 1 listed below discloses a prior-art bending machine (press brake) according to the preamble of claim 1.
- a punch-side table provided with a punch is disposed on its one side (upper side), and a die-side table provided with a die is disposed on its other side (lower side).
- a sheet material is bent between the punch and the die by stroking the punch to apply pressure to sheet material.
- a stroke of the punch is detected by a punch detector. The stroke may be changed by a thermal deformation of a frame. Therefore, when the stroke detected by the punch detector is not an expected amount, bending is done accurately by compensating the stroke.
- a trial bending(s) is done for each specification [material, sheet thickness, shape (bending length)] of sheet materials to be bent.
- a bending work there are two types of working methods, air bending and coining. Note that air bending can be further classified into partial bending and bottoming. Namely, a bending work can be classified into three types working methods, partial bending, bottoming and coining.
- Patent Document 1 Japanese Patent Application Laid-Open No. 2000-343128
- an object of the present invention is to provide a bending machine that can improve working efficiency by rendering a trial bending unnecessary and can bring a good working condition.
- a bending machine that includes a frame that includes a base section, and a punch-side frame section and a die-side frame section that are extended from both sides of the base section in an identical direction, respectively, a punch holder that is provided on the punch-side frame section and to which a punch is attached, a die holder that is provided on the die-side frame section and to which a die is attached, a pressing mechanism that presses the punch toward the die to bend a sheet material between the die and the punch, a first deflection detector that is provided in the pressing mechanism and detects a stroke of the punch required for bending the sheet material, characterized by: a second deflection detector that is supported by the die-side frame section and detects an actual displacement of the punch, and by a controller operable to previously store a relation between a deflection of the frame and a bending length, material and a sheet thickness of a sheet material, to calculate an actual deflection of the frame by subtracting a
- the controller stores the relation between a deflection of the frame and a bending length, material and a sheet thickness of a sheet material
- the pressing mechanism is controlled so that the actual deflection of the frame that is calculated based on the detection values of the first deflection detector and the second deflection detector is made consistent with the target deflection associated with a sheet material to be bent (and retrieved based on the relation). Therefore, the sheet material can be bent under a good working condition, and, further, no trial bending is required. As a result, working labors for bending a sheet material can be reduced.
- the pressing mechanism includes a motor for pressing that moves the punch toward the die, the first deflection detector is an encoder that detects rotations of the motor, and the second deflection detector is a scale that is supported by the die-side frame section via a support frame.
- the first deflection detector is the encoder of the motor for moving the punch and the second deflection detector is the scale for detecting the displacement of the punch, the actual deflection of the frame can be directly detected while bending a sheet material. Therefore, the controller can be control the motor precisely.
- the controller includes a deflection calculator that calculates the actual deflection of the frame from detection results of the first deflection detector and the second deflection detector, and a memory for storing a data table in which the relation is defined.
- the deflection calculator calculates the actual deflection of the frame and the data table in which the above relation is defined is stored in the memory, the relation between a deflection and a sheet material can be perceived accurately. Therefore, a sheet material can be bent successfully with no trial bending.
- the bending machine 1 includes a frame 2, a pressing mechanism 3, a detection mechanism 4, and a controller 5.
- the frame 2 is configured of a base section 21 having a given length, and a punch-side frame section 23 and a die-side frame section 25 that are integrally extended from both sides of the base section 21, respectively.
- the punch-side frame section 23 and the die-side frame section 25 are vertically extended from the base section 21 in an identical direction, respectively.
- a punch 6 and the pressing mechanism 3 are provided on the punch-side frame section 23.
- a die 7 is provided on the die-side frame section 25.
- the pressing mechanism 3 includes a ball screw 30 supported on the punch-side frame section 23, and a motor 32 for pressing.
- the ball screw 30 can move linearly along its axial direction.
- a coupling bracket 31 is coupled to an end of the ball screw 30.
- a punch holder 8 is attached to the coupling bracket 31.
- the punch 6 is attached to an end of the punch holder 8. The punch 6 presses a sheet material due to a movement of the ball screw 30, and thereby the sheet material is bent between the punch 6 and the die 7.
- the punch 6 is moved by the motor 32.
- the motor 32 has a reduction gear 33 on its output side.
- a nut 34 is coupled with the reduction gear 33.
- the ball screw 30 is meshed with the nut 34 to penetrate therethrough.
- the nut 34 is rotated in its forward/backward direction by the motor 32, the ball screw 30 moves linearly in its feeding/reversing direction. Then, a sheet material is pressed due to the movement of the ball screw 30 in the feeding direction, and thereby the sheet material is bent. In this case, it is required to restrict a rotation of a screw of the ball screw 30 so that the screw is not passively rotated along with the rotation of the nut 34. Therefore, an anti-rotation unit 38 is provided in the pressing mechanism 3.
- the rotation of the motor 32 is controlled by the controller 5.
- rotations of the motor 32 are detected by an encoder 11.
- the encoder 11 is a first deflection detector, and an actual stroke of the punch 6 toward the die 7 is detected by detecting the rotations of the motor 32.
- the stroke detected by the encoder 11 includes a deflection of the frame 2 caused by pressing a sheet material.
- a detection result of the encoder 11 is output to the controller 5.
- a motor 36 for high-speed feeding is provided in the pressing mechanism 3.
- the motor 36 moves the punch 6 at high speed to a position just before nipping a sheet material.
- the motor 36 is coupled to the coupling bracket 31 via a reduction gear 35.
- the die 7 is attached to a die holder 10.
- Te die holder 10 is attached to the die-side frame section 25 of the frame 2.
- the die holder 10 is attached to the die-side frame section 25 so that the die 7 and the punch 6 face to each other.
- the detection mechanism 4 is disposed near the die holder 10 on the frame 2.
- the detection mechanism 4 includes a support frame 41 supported by the die-side frame section 25, and a scale 42 attached to the support frame 41.
- the detection mechanism 4 is configured so that, even when a reactive force is generated against a pressing force for bending a sheet material, the reactive force doesn't act on the support frame 41.
- the scale 42 is disposed near the punch holder 8, and detects a relative position of the punch holder 8 to the die holder 10.
- the scale 42 is not directly fixed with the frame 2, but attached to the frame 2 via the support flame 41. Since the reactive force doesn't act on the support frame 41, the scale 42 can detect an actual displacement of the punch 6 without a deflection of the frame 2. Namely, the scale 42 is a second deflection detector that detects an actual displacement of the punch 6 when pressing a sheet material. A detection result of the scale 42 is output to the controller 5.
- the controller 5 includes a deflection calculator 51, and data tables 53.
- the controller 5 controls the motor 32 and the motor 36.
- the deflection calculator 51 calculates an actual deflection of the frame 2 when pressing a sheet material.
- the actual deflection of the frame 2 can be calculated by subtracting a detection value of the scale 42 (the second deflection detector) from a detection value of the encoder 11 (the first deflection detector). Specifically, the actual deflection of the frame 2 can be obtained by (detection value of the encoder 11) - (detection value of the scale 42).
- the data tables 53 are stored in a memory 56 (explained later) in the controller 5.
- recorded are relations between a deflection of the frame 2 and a bending length, material and a sheet thickness of a sheet material.
- the controller 5 determines, based on the data tables 53, a target deflection of the frame 2 associated with a bending length, material and a sheet thickness of a sheet material, and then controls the motor 32 so that the actual deflection calculated by the deflection calculator 51 becomes consistent with the target deflection.
- Fig. 2 is a block diagram showing the controller 5.
- an input interface 54, an output interface 55 and the memory 56 are connected with a CPU 58 by a data bus 57. It can be said that the above-explained deflection calculator 51 is configured of these components.
- the encoder 11, the scale 42, the motor 32 and the motor 36 that are explained above are also connected with the data bus 57.
- the input interface 54 inputs various data to the CPU 58, and, for example, a keyboard and an external disk drive are connected to the input interface 54.
- the output interface 55 outputs data from CPU 58, and, for example, a display and a printer are connected with the output interface 55.
- Data and a work program that are input from the input interface 54 and the above-explained data tables 53 are stored in the memory 56.
- the detection results of the encoder 11 and the scale 42 are controlled by commands output from the CPU 58 via the data bus 57.
- FIG. 4 shows the data tables 53 each of which indicates a relation between a sheet material [sheet thickness ⁇ material] and a deflection of the frame.
- the data tables 53 are made for every sheet material, and the deflection ⁇ is stored in the data tables 53 for each of the above sheet materials. Note that it may be possible to make one data sheet 53 by regarding types of sheet materials as a parameter.
- the measured deflections ⁇ of the frame 2 are converted to the pressing forces F by the above equation (II), respectively.
- F AL1 , F AL2 , ⁇ are calculated (similarly to a sheet material B).
- F' AL1 , F' AL2 , ⁇ are calculated (similarly to a sheet material B).
- calculated is an average value Z of all the pressing forces F' per unit length with respect to each bending length L (L1, L2, L3 ⁇ ) for each of the sheet materials (A, B, ⁇ ).
- step S11 data of a sheet material to be bent are input to the controller 5 (step S11).
- the data of the sheet material are a bending length, a sheet thickness and its material.
- Ld is the bending length in the data input in step S11.
- Z is the required pressing force for the sheet material [sheet thickness ⁇ material] of the data input in step S11, and is stored in the controller 5 through the above-explained working tests.
- a target deflection ⁇ t of the frame 2 is calculated by the above equation (I) based on the calculated target pressing force Ft (step S12).
- the target deflection ⁇ t of the frame 2 is determined based on the target pressing force Ft calculated in step S11. Namely, when the frame 2 involves the deflection ⁇ t, it can be regarded that the target pressing force Ft is applied to the sheet material.
- the controller 5 does pressing by driving the motor for pressing (step S13). At this time, the detection results of the encoder 11 and the scale 42 are output to the controller 5. The deflection of the frame 2 due to pressing is measured (step S14).
- the motor 32 is controlled with feedback based on the value calculated by subtracting the detection value of the scale 42 from the detection value of the encoder 11, i.e. the actual deflection ⁇ . Specifically, the motor 32 is controlled with feedback so that the actual deflection ⁇ of the frame 2 is made consistent with the target deflection ⁇ t.
- step S14 When the deflection ⁇ measured in step S14 becomes consistent with the target deflection ⁇ t determined in step S12, i.e. when the actual pressing force F becomes consistent with the target pressing force Ft, the controller 5 stops the motor 32 (step S15), and bending of the sheet material is finished. If the deflection ⁇ measured in step S14 doesn't become consistent with the target deflection ⁇ t determined in step S12, the process flow returns to step S13 and driving of the motor 32 is continued by the controller 5.
- the controller 5 stores data of relations between a deflection of the frame 2 and a bending length, material and a sheet thickness of a sheet material, and calculates, based on the stored data, a target deflection of the frame 2 associated with a bending length, material and a sheet thickness of a sheet material, and then controls the motor 32 so that an actual deflection of the frame 2 becomes consistent with the target deflection. Therefore, a sheet material can be bent under a good working condition, so that a trial bending(s) can be rendered unnecessary and working labors for bending a sheet material can be reduced.
- the deflection of the frame 2 is detected by the encoder 11 of the motor 32 for pressing and the scale 42 for detecting the displacement of the punch 6 in the present embodiment, the deflection of the frame 2 can be directly detected while bending a sheet material. Therefore, the controller 5 can control the motor 32 precisely.
- controller 5 since the controller 5 includes the deflection calculator 51 and the data tables 53 that indicate relations between a deflection and a bending length, material and sheet thickness of a sheet material, a relation between deflection of the frame 2 and a sheet material can be perceived accurately and thereby a sheet material can be bent successfully with no trial bending.
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Bending Of Plates, Rods, And Pipes (AREA)
Claims (3)
- Presse plieuse (1) comprenant :un châssis (2) qui inclut une section de base (21), une section de châssis du côté frappe (23) et une section de châssis du côté matrice (25) qui s'étendent respectivement depuis les deux côtés de la section de base (21) dans une direction identique,un support de poinçon (8) qui est prévu sur la section de châssis du côté frappe (23) et auquel est fixé un poinçon (6),un support de matrice (10) qui est prévu sur la section de châssis du côté matrice (25) et auquel est fixé une matrice (7),un mécanisme de pressage (3) qui presse le poinçon (6) vers la matrice (7) afin de plier une feuille de matériau entre la matrice (7) et le poinçon (6),un premier détecteur de déflexion (11) qui est prévu dans le mécanisme de pressage (3) et qui détecte la course du poinçon (6) requise pour plier la feuille de matériau, caractérisé par :un second détecteur de déflexion (42) qui est supporté par la section de châssis du côté matrice (25) et qui détecte le déplacement réel du poinçon (6), etun contrôleur (5), mis en oeuvre pour mémoriser au préalable une relation entre la déflexion du châssis (2), la longueur de pliage d'un matériau ainsi que l'épaisseur d'une feuille de matériau, pour calculer la déflexion réelle (δ) du châssis (2) en soustrayant la valeur de détection du second détecteur de déflexion (42) de la valeur de détection du premier détecteur de déflexion (11) afin d'obtenir une déflexion cible (δt) du châssis (2) dans le but de plier une feuille de matériau à cintrer sur la base de la relation mémorisée, et pour commander le mécanisme de pressage (3) de sorte à ce que la déflexion réelle (δ) devienne cohérente avec la déflexion cible (δt).
- Presse plieuse (1) selon la revendication 1, dans laquelle :le mécanisme de pressage (3) inclut un moteur (32) de pressage qui déplace le poinçon (6) vers la matrice (7),le premier détecteur de déflexion (11) est un codeur (11) qui détecte la rotation du moteur (32), etle second détecteur de déflexion (42) est une échelle (42) qui est supportée par la section de châssis du côté matrice (25) par l'intermédiaire d'un châssis support (41).
- Presse plieuse (1) selon la revendication 1 ou la revendication 2, dans laquelle :le contrôleur (5) inclut un calculateur de déflexion (51) qui calcule la déflexion réelle (δ) du châssis (2) à partir des résultats de détection du premier détecteur de déflexion (11) et du second détecteur de déflexion (42) ; et il est défini une mémoire (56) destinée à stocker une table de données dans laquelle est définie la relation.
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP2011025800 | 2011-02-09 | ||
PCT/JP2012/052761 WO2012108436A1 (fr) | 2011-02-09 | 2012-02-07 | Presse-plieuse |
Publications (3)
Publication Number | Publication Date |
---|---|
EP2674232A1 EP2674232A1 (fr) | 2013-12-18 |
EP2674232A4 EP2674232A4 (fr) | 2016-09-07 |
EP2674232B1 true EP2674232B1 (fr) | 2017-05-10 |
Family
ID=46638649
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP12744487.5A Active EP2674232B1 (fr) | 2011-02-09 | 2012-02-07 | Presse-plieuse |
Country Status (5)
Country | Link |
---|---|
US (1) | US20130312479A1 (fr) |
EP (1) | EP2674232B1 (fr) |
JP (1) | JP5579877B2 (fr) |
CN (1) | CN103370150B (fr) |
WO (1) | WO2012108436A1 (fr) |
Families Citing this family (8)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP6243752B2 (ja) * | 2014-02-25 | 2017-12-06 | 株式会社アマダホールディングス | プレスブレーキ |
CN105598219A (zh) * | 2014-11-25 | 2016-05-25 | 无锡市恒盛电机有限公司 | 带厚度调节折弯扭矩与多点压力检测的钣金折弯装置 |
CN105598222A (zh) * | 2014-11-25 | 2016-05-25 | 无锡市恒盛电机有限公司 | 滚压折弯装置 |
CN105855330B (zh) * | 2016-04-07 | 2017-10-24 | 扬帆集团股份有限公司 | 一种船舶钢板弯折装置 |
JP6243954B2 (ja) * | 2016-04-14 | 2017-12-06 | 株式会社アマダホールディングス | プレスブレーキの安全装置 |
WO2019158650A2 (fr) * | 2018-02-14 | 2019-08-22 | Langenstein & Schemann Gmbh | Système de production, module de production, procédé de fonctionnement et de réglage d'une ligne de production, et procédé de fabrication d'une pièce |
JP6638022B2 (ja) * | 2018-05-28 | 2020-01-29 | 株式会社アマダホールディングス | プレスブレーキ制御装置、プレスブレーキ制御方法、及び金型 |
AT523360B1 (de) * | 2019-12-19 | 2022-05-15 | Trumpf Maschinen Austria Gmbh & Co Kg | Biegemaschine und Kontrolleinrichtung |
Family Cites Families (13)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
SE463701B (sv) * | 1980-12-09 | 1991-01-14 | Amada Co Ltd | Saett att utfoera en v-formad bockning i en press och anordning foer justering av ett stoedelement i en press |
US4488237A (en) * | 1982-04-29 | 1984-12-11 | Dynamics Research Corporation | Two dimensional press brake control system and apparatus |
JP2818275B2 (ja) * | 1990-08-25 | 1998-10-30 | 松下電工株式会社 | 曲げ加工方法 |
JP3202251B2 (ja) * | 1991-03-08 | 2001-08-27 | 株式会社アマダ | 折曲げ加工装置 |
JP3688004B2 (ja) * | 1995-03-23 | 2005-08-24 | 株式会社小松製作所 | プレスブレーキ |
IT1295498B1 (it) * | 1997-10-17 | 1999-05-12 | Luciano Gasparini | Dispositivo per rilevare la flessione delle traverse, inferiore e superiore, finalizzato all'interazione con almeno un sistema di |
JP3692261B2 (ja) * | 1999-06-24 | 2005-09-07 | アイダエンジニアリング株式会社 | サーボプレスの荷重による下死点補正装置 |
JP2000343128A (ja) | 1999-06-04 | 2000-12-12 | Amada Eng Center Co Ltd | 曲げ加工方法および曲げ加工装置 |
JP2002239800A (ja) * | 2000-12-04 | 2002-08-28 | Sintokogio Ltd | プレス装置及びプレス装置の制御方法 |
JP4113948B2 (ja) * | 2003-07-17 | 2008-07-09 | 独立行政法人産業技術総合研究所 | 操作力発生装置 |
JP2006192498A (ja) * | 2004-12-15 | 2006-07-27 | Amada Co Ltd | 曲げ加工方法及び折曲げ加工機 |
CN101700544A (zh) * | 2009-11-12 | 2010-05-05 | 朱斌 | 数控扭轴同步液压折弯机滑块挠度补偿机构 |
CN102319777B (zh) * | 2011-09-20 | 2013-04-24 | 泰安华鲁锻压机床有限公司 | 一种船用卷板机挠度的自动补偿装置 |
-
2012
- 2012-02-07 US US13/984,317 patent/US20130312479A1/en not_active Abandoned
- 2012-02-07 EP EP12744487.5A patent/EP2674232B1/fr active Active
- 2012-02-07 CN CN201280008120.5A patent/CN103370150B/zh not_active Expired - Fee Related
- 2012-02-07 WO PCT/JP2012/052761 patent/WO2012108436A1/fr active Application Filing
- 2012-02-07 JP JP2012556901A patent/JP5579877B2/ja not_active Expired - Fee Related
Also Published As
Publication number | Publication date |
---|---|
EP2674232A1 (fr) | 2013-12-18 |
JPWO2012108436A1 (ja) | 2014-07-03 |
CN103370150A (zh) | 2013-10-23 |
JP5579877B2 (ja) | 2014-08-27 |
WO2012108436A1 (fr) | 2012-08-16 |
US20130312479A1 (en) | 2013-11-28 |
CN103370150B (zh) | 2016-04-20 |
EP2674232A4 (fr) | 2016-09-07 |
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