EP0231735A1 - Dispositif de synchronisation pour l'entraînement hydraulique à multiples cylindres - Google Patents

Dispositif de synchronisation pour l'entraînement hydraulique à multiples cylindres Download PDF

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Publication number
EP0231735A1
EP0231735A1 EP86890350A EP86890350A EP0231735A1 EP 0231735 A1 EP0231735 A1 EP 0231735A1 EP 86890350 A EP86890350 A EP 86890350A EP 86890350 A EP86890350 A EP 86890350A EP 0231735 A1 EP0231735 A1 EP 0231735A1
Authority
EP
European Patent Office
Prior art keywords
cylinder
working
control
hydraulic
control unit
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
EP86890350A
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German (de)
English (en)
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EP0231735B1 (fr
Inventor
Bernd Walter
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.)
Hoerbiger Hydraulik GmbH
Original Assignee
Hoerbiger Hydraulik GmbH
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Publication of EP0231735A1 publication Critical patent/EP0231735A1/fr
Application granted granted Critical
Publication of EP0231735B1 publication Critical patent/EP0231735B1/fr
Anticipated expiration legal-status Critical
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Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F15—FLUID-PRESSURE ACTUATORS; HYDRAULICS OR PNEUMATICS IN GENERAL
    • F15B—SYSTEMS ACTING BY MEANS OF FLUIDS IN GENERAL; FLUID-PRESSURE ACTUATORS, e.g. SERVOMOTORS; DETAILS OF FLUID-PRESSURE SYSTEMS, NOT OTHERWISE PROVIDED FOR
    • F15B11/00—Servomotor systems without provision for follow-up action; Circuits therefor
    • F15B11/16—Servomotor systems without provision for follow-up action; Circuits therefor with two or more servomotors
    • F15B11/22—Synchronisation of the movement of two or more servomotors
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B30—PRESSES
    • B30B—PRESSES IN GENERAL
    • B30B15/00—Details of, or accessories for, presses; Auxiliary measures in connection with pressing
    • B30B15/16—Control arrangements for fluid-driven presses
    • B30B15/24—Control arrangements for fluid-driven presses controlling the movement of a plurality of actuating members to maintain parallel movement of the platen or press beam

Definitions

  • the invention relates to a synchronous control device for a hydraulic multi-cylinder drive, in particular for a die bending machine, each with a displacement transducer assigned to each working cylinder and connected to a common electronic control unit and each with a proportional directional control valve that is pressurized with pressure and connected to the control unit via control lines for each working cylinder.
  • Hydraulic synchronization control is in particular the relatively high design effort for the execution of the completely separate hydraulic circuits of each working cylinder, since essentially all parts of the hydraulics - i.e. pump, filter, any pressure compensators and the like - correspond to the number of working cylinders Machine must be available, which at least partially removes or limits the advantage of high synchronization accuracy.
  • the object of the present invention is to improve a synchronization control device of the type mentioned at the outset in such a way that while maintaining the high achievable parallelism or synchronization accuracy, the design effort for the device can be reduced.
  • This is achieved according to the present invention in that all proportional directional control valves are connected to a common drive station for supplying the working cylinders with pressure medium.
  • a reduction in the structural outlay for the synchronous control device can be achieved directly, since only a single hydraulic pump with filters and the like is thus required for the entire multi-cylinder arrangement. It has surprisingly been found that the mutual hydraulic influencing of the working cylinders now supplied according to the invention by a common drive station is negligible or can be practically completely compensated for by the electronic-hydraulic synchronous control.
  • both sides of each working cylinder are connected via shuttle valves to a three-way pressure compensator common to all working cylinders, which contributes to a further reduction in the constructional effort in the sense of the above-mentioned object of the present invention.
  • the use of the three-way pressure compensator which is already known per se in connection with the known electronic-hydraulic synchronous control device mentioned at the beginning, enables low power loss in the dynamic state of the multi-cylinder drive, since this means that the unnecessary amount of pressure medium under the currently existing system pressure is via these three-way - Pressure compensators are directed to the tank can and does not have to be passed through the maximum pressure relief valve, which would mean a higher heat dissipation. Furthermore, this three-way pressure compensator ensures a constant pressure drop across the individual channels of the proportional directional control valves.
  • the upper beam 1 of the die bending machine which is not shown in further detail, is provided at its two outer ends 2, 3 with a hydraulic cylinder / piston arrangement 4, in each case the piston 5 with the upper beam 1 itself and the cylinder 6 in a manner not shown is connected to the machine frame.
  • the lower beam 7 is rigidly connected to the machine frame in a manner also not shown, with which a relative movement between the upper beam 1 and the lower beam 7 can be brought about via the cylinder / piston arrangements 4, which bending work on corresponding, usually interchangeable die tools, between the upper beam 1 and the lower beam 7 workpieces located.
  • displacement transducers 8 are arranged, for example according to the principle of the reflection light barrier, in an inductive manner, or by using another known principle, either in an analog or incremental or digital manner, on the latter Provide the given signal between the actual upper bar 1 and lower bar 7 or the corresponding signal via signal lines 9 Deliver to a common electronic control unit 10.
  • the drive station 17 connected to the annular spaces 11 of the cylinder / piston arrangements 4 via lines 12 to 16 essentially consists of a motor 18, the hydraulic pump 19 coupled to it and any filters not shown here, and is for both cylinder / piston arrangements 4 together.
  • Proportional directional control valves 20 are switched into the lines 14, 15 and 13, 16, which are already separate for the two cylinder / piston arrangements 4, which here can be actuated directly from the control unit 10 via proportional magnets 21 and corresponding control lines 22 and, depending on their switching position, one Enabling more or less large quantities of the annular spaces 11 - or alternatively via the lines 23, 23 'and also the cylinder spaces 24 - and at the same time also the backflow of hydraulic fluid from the cylinder spaces 24 or annular spaces 11 via lines 125, 26, 27 in release or shut off the tank 28 accordingly.
  • each cylinder / piston arrangement or each working cylinder 4 formed therefrom are connected to changeover valves 33, 34 via pressure lines 29, 30 and 31, 32 connected to the lines 15, 2 3 and 16, 23, which in turn are connected again via Lines 35, 36 are connected to a superordinate shuttle valve 37.
  • the outlet of the shuttle valve 37 at which, according to the design of all three shuttle valves, the highest system pressure is always present, is connected via a line 38 to a three-way pressure compensator 39, which in the exemplary embodiment shown is designed as a slide element.
  • the slide chamber of the pressure compensator facing away from the input of line 38 from the superordinate shuttle valve 37 39 is connected via a line 40 to the line 12 from the pressure side of the hydraulic pump 19;
  • the annular space 42 which is shut off in the illustrated position of the slide 41 of the pressure compensator 39 is relieved via the line 27 to the tank 28.
  • a pressure control valve 43 is connected via lines 44, 45, which, for example, is also electrically proportional and is limited by the control unit 10 in a manner not shown here or ensuring the necessary bending pressure, which can either be programmed via the electronics in the control unit 10 or is calculated by the control unit 10 from the various process parameters.
  • the upper beam 1 will begin to move relative to the lower beam 7 in the direction of the axes of the working cylinders 4, the direction of movement depending on which of the lines 15, 23 and 16, 23 'is opened.
  • the transducers 8 Via the transducers 8, the current position of the two outer ends 2, 3 of the upper beam 1 relative to the lower beam 7 is continuously transmitted via the signal lines 9 to the control unit 10, where an electronically Target / actual comparison is carried out.
  • the shuttle valves 33, 34 and 37 are designed or arranged in this way that the excess amount of hydraulic medium not required in this state is discharged via the line 40 into the then opened ring space 42 of the pressure compensator 39 or the line 27, so that the pressure control valve 43, at which greater heating and thus greater power loss occurs, only at the bending point or when setting maximum pressure opens.
  • the device shown and described manages with only one drive station and one pressure compensator regardless of the number of working cylinders, the design effort for the nevertheless very precise synchronization control is significantly reduced, which is also reflected in a reduced assembly and maintenance effort.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Physics & Mathematics (AREA)
  • Fluid Mechanics (AREA)
  • General Engineering & Computer Science (AREA)
  • Fluid-Pressure Circuits (AREA)
  • Bending Of Plates, Rods, And Pipes (AREA)
EP19860890350 1985-12-30 1986-12-19 Dispositif de synchronisation pour l'entraînement hydraulique à multiples cylindres Expired - Lifetime EP0231735B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
AT377385A AT385466B (de) 1985-12-30 1985-12-30 Gleichlaufregeleinrichtung fuer einen hydraulischen mehrzylinderantrieb
AT3773/85 1985-12-30

Publications (2)

Publication Number Publication Date
EP0231735A1 true EP0231735A1 (fr) 1987-08-12
EP0231735B1 EP0231735B1 (fr) 1990-01-24

Family

ID=3555231

Family Applications (1)

Application Number Title Priority Date Filing Date
EP19860890350 Expired - Lifetime EP0231735B1 (fr) 1985-12-30 1986-12-19 Dispositif de synchronisation pour l'entraînement hydraulique à multiples cylindres

Country Status (5)

Country Link
EP (1) EP0231735B1 (fr)
JP (1) JPS62230426A (fr)
CN (1) CN1007371B (fr)
AT (1) AT385466B (fr)
DE (1) DE3668433D1 (fr)

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2655907A1 (fr) * 1989-12-19 1991-06-21 Plazenet Jean Presse plieuse hydraulique a tablier inferieur mobile.
EP0453986A2 (fr) * 1990-04-25 1991-10-30 Bobst S.A. Procédé d'asservissement du parallélisme des deux sommiers d'une presse
FR2676041A1 (fr) * 1991-05-03 1992-11-06 Freyssinet Procede de levage multipoint controle de structures importantes relativement souples, et systemes correspondant.
WO1995011189A1 (fr) * 1993-10-22 1995-04-27 Ravaglioli S.P.A. Dispositif de levage electrohydraulique
WO2002025119A1 (fr) * 2000-09-20 2002-03-28 Morphic Technologies Aktiebolag Agencement hydraulique
WO2013156095A1 (fr) * 2012-04-17 2013-10-24 Hoerbiger Automatisierungstechnik Holding Gmbh Presse

Families Citing this family (19)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH087934Y2 (ja) * 1990-03-28 1996-03-06 株式会社小松製作所 プレスブレーキの油圧回路
CN1325803C (zh) * 2004-11-03 2007-07-11 北京中水长固液分离技术有限公司 一种多缸同步加压压紧装置及控制方法
CN101975202B (zh) * 2010-10-15 2013-07-24 马鞍山钢铁股份有限公司 一种液压缸同步控制***的控制方法
CN102943789B (zh) * 2012-11-09 2015-12-09 昆明中铁大型养路机械集团有限公司 一种可调压力和流量的缓冲液压缸、控制方法及液压***
CN102996580A (zh) * 2012-11-27 2013-03-27 齐齐哈尔轨道交通装备有限责任公司 旁承油缸控制***
CN103089750B (zh) * 2012-12-10 2015-11-18 天水锻压机床(集团)有限公司 用可编程控制器进行多组油缸控制的控制器及其控制方法
CN103640248A (zh) * 2013-11-16 2014-03-19 苏州蓝王机床工具科技有限公司 龙门液压机双液压缸同步控制***
CN103671334B (zh) * 2013-12-12 2016-01-27 中联重科股份有限公司 一种油气悬挂油缸同步升降的液压控制***及工程车辆
CN103775418B (zh) * 2014-01-06 2014-10-29 华中科技大学 一种液压机双缸同步装置
DE102014005352B4 (de) * 2014-04-11 2016-03-10 Hoerbiger Automatisierungstechnik Holding Gmbh Maschinenpresse
CN105465074A (zh) * 2014-09-02 2016-04-06 天津市天锻压力机有限公司 基于Delta控制器的粉末液压机过程同步运动***
CN105458251B (zh) * 2014-09-02 2018-02-06 天津市天锻压力机有限公司 基于Delta控制器的粉末液压机精确定位***
CN104340905A (zh) * 2014-11-12 2015-02-11 南京中船绿洲机器有限公司镇江船舶辅机厂 双吊点收放装置同步检测电路及同步控制方法
CN104747516B (zh) * 2015-01-30 2017-03-22 四川南骏汽车集团有限公司 一种液压缸同步升降控制***
CN104743470A (zh) * 2015-03-31 2015-07-01 苏州艾沃意特机械设备制造有限公司 可视化自调平双柱式举升机
CN105020192A (zh) * 2015-07-30 2015-11-04 中国重型机械研究院股份公司 一种新型钢包升降同步控制***
CN105818417A (zh) * 2016-05-24 2016-08-03 郭文坤 一种压力自平衡冲床
CN106438520A (zh) * 2016-12-17 2017-02-22 中国重型机械研究院股份公司 一种冷床升降液压同步控制装置
CN112387335A (zh) * 2020-11-05 2021-02-23 混楚(上海)环保设备制造有限公司 一种废混凝土智能静压破碎装置

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2029287A1 (de) * 1970-06-13 1971-12-23 Ver Flugtechnische Werke Servostellantrieb mit hydraulischer Waage
DD204460A1 (de) * 1982-03-24 1983-11-30 Bauakademie Ddr Hydraulische einrichtung zur synchronen bewegung von lasten

Family Cites Families (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4145958A (en) * 1977-12-02 1979-03-27 Borg-Warner Corporation Fluid control system with automatically actuated motor port lock-out valves
JPH0677879B2 (ja) * 1985-07-06 1994-10-05 株式会社アマダ 加工機械の電気液圧サ−ボ装置

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2029287A1 (de) * 1970-06-13 1971-12-23 Ver Flugtechnische Werke Servostellantrieb mit hydraulischer Waage
DD204460A1 (de) * 1982-03-24 1983-11-30 Bauakademie Ddr Hydraulische einrichtung zur synchronen bewegung von lasten

Non-Patent Citations (3)

* Cited by examiner, † Cited by third party
Title
MASCHINENMARKT, Band 91, Heft 54, 5. Juli 1985, Seiten 1051-1054, Würzburg; W.A. KOLLEK et al.: "Optimieren der Abmessungen von Gleichlaufventilen" *
MASCHINENMARKT-INDUSTRIEJOURNAL, Band 55, Heft 55, Juli 1972, Seiten 1266-1268, Würzburg; H. NIKOLAUS "Nachzügeln ausgeschlossen" *
OLEODINAMICA PNEUMATICA, Band 21, Nr. 1, 1980, Seite 37, Milano, IT; "Sistema elettro-idraulico di equilibratura" *

Cited By (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2655907A1 (fr) * 1989-12-19 1991-06-21 Plazenet Jean Presse plieuse hydraulique a tablier inferieur mobile.
EP0434541A1 (fr) * 1989-12-19 1991-06-26 Amada S.A. Presse plieuse hydraulique à tablier inférieur mobile
WO1991008894A1 (fr) * 1989-12-19 1991-06-27 Amada S.A. Presse plieuse hydraulique a tablier inferieur mobile
EP0453986A2 (fr) * 1990-04-25 1991-10-30 Bobst S.A. Procédé d'asservissement du parallélisme des deux sommiers d'une presse
EP0453986A3 (en) * 1990-04-25 1992-05-13 Bobst S.A. Method for controlling the parallelism of two beams of a press
FR2676041A1 (fr) * 1991-05-03 1992-11-06 Freyssinet Procede de levage multipoint controle de structures importantes relativement souples, et systemes correspondant.
WO1995011189A1 (fr) * 1993-10-22 1995-04-27 Ravaglioli S.P.A. Dispositif de levage electrohydraulique
WO2002025119A1 (fr) * 2000-09-20 2002-03-28 Morphic Technologies Aktiebolag Agencement hydraulique
WO2013156095A1 (fr) * 2012-04-17 2013-10-24 Hoerbiger Automatisierungstechnik Holding Gmbh Presse
US9168713B2 (en) 2012-04-17 2015-10-27 Hoerbiger Automatisierungstechnik Holding Gmbh Machine press

Also Published As

Publication number Publication date
JPS62230426A (ja) 1987-10-09
CN86108883A (zh) 1987-08-12
ATA377385A (de) 1987-09-15
AT385466B (de) 1988-04-11
EP0231735B1 (fr) 1990-01-24
CN1007371B (zh) 1990-03-28
DE3668433D1 (de) 1990-03-01

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