CN103847128A - Hydraulic control system - Google Patents

Hydraulic control system Download PDF

Info

Publication number
CN103847128A
CN103847128A CN201210502631.4A CN201210502631A CN103847128A CN 103847128 A CN103847128 A CN 103847128A CN 201210502631 A CN201210502631 A CN 201210502631A CN 103847128 A CN103847128 A CN 103847128A
Authority
CN
China
Prior art keywords
valve
master cylinder
hydraulic control
cylinder
pressure
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
CN201210502631.4A
Other languages
Chinese (zh)
Other versions
CN103847128B (en
Inventor
朱鹏
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.)
WORLD PRECISE MACHINERY (CHINA) Co.,Ltd.
Original Assignee
JIANGSU WORLD ELECTROMECHANICAL GROUP CO Ltd
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by JIANGSU WORLD ELECTROMECHANICAL GROUP CO Ltd filed Critical JIANGSU WORLD ELECTROMECHANICAL GROUP CO Ltd
Priority to CN201210502631.4A priority Critical patent/CN103847128B/en
Publication of CN103847128A publication Critical patent/CN103847128A/en
Application granted granted Critical
Publication of CN103847128B publication Critical patent/CN103847128B/en
Active legal-status Critical Current
Anticipated expiration legal-status Critical

Links

Abstract

The invention provides a hydraulic control system, which comprises a main cylinder and an oil tank, wherein the piston cylinder of the main cylinder is connected with a sliding block. The hydraulic control system further comprises a PLC (Programmable Logic Controller) used for controlling descending, stroke returning, and descending speed and pressure of the sliding block connected with the piston cylinder of the control main cylinder; a proximity switch is arranged in an extending direction of the piston cylinder of the main cylinder; the oil tank is connected with a first oil opening of the main cylinder through a constant power variable pump, a cartridge valve, an overflow valve, a two-position four-way electromagnetic valve, a one-way valve, a cartridge valve with a shuttle valve, a throttling valve and a proportional valve in sequence. When the hydraulic control system machines a workpiece, descending speed of the sliding block can be adjusted through on-off of each electromagnetic valve in the cartridge valve of the hydraulic control system, and therefore idle running time of the sliding block is reduced; the working speed of the main cylinder is ensured by a variable curve of the constant power variable pump, and thus qualification rate of products is greatly improved, the phenomena that the products are stretched and scrapped due to the fact that a speed cannot be adjusted are reduced, and the hydraulic control system has strong practicality and obvious economic benefits.

Description

Hydraulic control system
Technical field
The present invention relates to a kind of hydraulic control system.
Background technology
In the use procedure of hydraulic press, in existing hydraulic press master cylinder control system, existing workpiece to having speed and pressure requirement adds and is subject to certain limitation man-hour, workpiece angle is in to draw speed pulls open workpiece when too fast, in the time that draw speed is too small, make workpiece wrinkling, and insufficient pressure and the excessive workpiece that causes of pressure can not moulding or the problem destroyed of workpiece, thereby affect normally carrying out smoothly of workpiece processing, be unfavorable for the raising of production efficiency, the problems referred to above are the problems that should solve in the design and production use procedure of the control system of hydraulic press.
Summary of the invention
The object of this invention is to provide a kind of hydraulic control system solves the workpiece to having speed and pressure to require existing in prior art and adds and be subject to certain limitation man-hour, workpiece angle is in to draw speed pulls open workpiece when too fast, in the time that draw speed is too small, make product wrinkling, and insufficient pressure and the excessive workpiece that causes of pressure can not moulding or the problem destroyed of product.
Technical solution of the present invention is:
A kind of hydraulic control system, comprise master cylinder and fuel tank, the piston cylinder of described master cylinder is connected with slide block, also comprise the descending of piston cylinder connection sliding block for controlling master cylinder, backhaul, downstream rate, the PLC controller of pressure, the direction of stretching out at the piston cylinder of described master cylinder is provided with approach switch, described fuel tank is successively by variable displacement with constant power pump, inserted valve, overflow valve, two position four-way solenoid valves, check valve, band shuttle valve inserted valve, choke valve, proportioning valve connects the hydraulic fluid port one of described master cylinder, described band shuttle valve inserted valve limits inserted valve by tape travel successively, 2/2-way magnetic valve connects the oil-out two of described master cylinder, described fuel tank connects the hydraulic fluid port three of described master cylinder by external control prefill valve.
Further improve and be: the changes in flow rate that the downstream rate of described slide block is caused the variation of load by variable displacement with constant power pump is controlled, and described pressure is regulated by control ratio valve by PLC controller.
Further improve and be: described check valve be provided with Pressure gauge with the oil circuit that is connected between shuttle valve inserted valve, the oil circuit that is connected between the hydraulic fluid port one of described proportioning valve and master cylinder is provided with pressure sensor.
Further improve and be: described master cylinder is fixed in the fuselage of hydraulic press.
The invention has the beneficial effects as follows: a kind of hydraulic control system of the present invention, workpiece is being added to man-hour, the master cylinder speed of service, be that slide block down speed can be adjusted by the break-make of controlling each magnetic valve in hydraulic control system inserted valve, thereby reduce the slide block no-load running time, master cylinder operating rate is guaranteed by variable displacement with constant power pump variable curve, so greatly improve the qualification rate of product and reduced because speed can not regulate and caused the product phenomenon of scrapping that stretches, there is very strong practicality and significant economic benefit.
Accompanying drawing explanation
Fig. 1 is the structural representation of the embodiment of the present invention;
Wherein: 1-fuel tank, 2-variable displacement with constant power pump, 3-inserted valve, 4-overflow valve, 5-two position four-way solenoid valves, 6-check valve, 7-Pressure gauge, 8-band shuttle valve inserted valve, 9-tape travel restriction inserted valve, 10-2/2-way magnetic valve, 11-pressure sensor, 12-proportioning valve, 13-choke valve, 14-master cylinder, 15-approach switch, 16-hydraulic fluid port one, 17-hydraulic fluid port two, 18-hydraulic fluid port three, 19-external control prefill valve, 20-slide block.
The specific embodiment
Describe the preferred embodiments of the present invention in detail below in conjunction with accompanying drawing.
As shown in Figure 1, the present embodiment provides a kind of hydraulic control system, comprise master cylinder 14 and fuel tank 1, the piston cylinder of described master cylinder 14 is connected with slide block 20, also comprise the descending of piston cylinder connection sliding block 20 for controlling master cylinder 14, backhaul, downstream rate, the PLC controller of pressure, the direction of stretching out at the piston cylinder of described master cylinder 14 is provided with approach switch 15, described fuel tank 1 is successively by variable displacement with constant power pump 2, inserted valve 3, overflow valve 4, two position four-way solenoid valves 5, check valve 6, band shuttle valve inserted valve 8, choke valve 13, proportioning valve 12 connects the hydraulic fluid port 1 of described master cylinder 14, described band shuttle valve inserted valve 8 limits inserted valve 93 by tape travel successively, 2/2-way magnetic valve 10 connects the oil-out 2 17 of described master cylinder 14, described fuel tank 1 connects the hydraulic fluid port 3 18 of described master cylinder 14 by external control prefill valve 19.The changes in flow rate that the downstream rate of described slide block 20 is caused the variation of load by variable displacement with constant power pump 2 is controlled, and described pressure is regulated by control ratio valve 12 by PLC controller.Described check valve 6 be provided with Pressure gauge 7 with the oil circuit that is connected between shuttle valve inserted valve 8, the oil circuit that is connected between the hydraulic fluid port 1 of described proportioning valve 12 and master cylinder 14 is provided with pressure sensor 11.Described master cylinder 14 is fixed in the fuselage of hydraulic press.
A kind of hydraulic control system of the present embodiment, moves each trip segment speed and pressure regulates by the master cylinder 14 to hydraulic press,
Control slide block 20 descending fast: make the magnetic valve YV1 energising of two position four-way solenoid valves 5 by PLC controller, magnetic valve YV2, the magnetic valve YV4 in two position four-way solenoid valves 5 all electric, the epicoele of master cylinder 14 obtains pressure, the magnetic valve YV6 of 2/2-way magnetic valve 10 obtains electric, the cavity of resorption loop of master cylinder 14 is connected, and the piston cylinder of master cylinder 14 is descending, and external control prefill valve 19 is automatically inhaled and opened, master cylinder 14 does freely falling body under slide block 20 weight, and the piston cylinder of master cylinder 14 is descending fast.
Controlling slide block 20 goes slowly: in the time that slide block 20 runs to the S2 in approach switch 15, PLC controller makes magnetic valve YV5 and the magnetic valve YV6 of the magnetic valve YV1 of two position four-way solenoid valves 5 and magnetic valve YV2,2/2-way magnetic valve 10 obtain electric, the cavity of resorption loop of the d counterbalance valve 5MPa access master cylinder 14 in overflow valve 4, produce back pressure, the piston cylinder speed of service of master cylinder 14 is determined by the flow of variable displacement with constant power pump 2.
The downstream rate of slide block and pressure: in the time that slide block 20 runs to the S3 in approach switch 15, PLC controller makes magnetic valve YV5 and the magnetic valve YV6 of the magnetic valve YV1 of two position four-way solenoid valves 5 and magnetic valve YV2,2/2-way magnetic valve 10 obtain electric, proportioning valve 12 is worked, the variable curve controlled of the changes in flow rate that the operating rate of master cylinder 14 is caused the variation of load by variable displacement with constant power pump 2, pressure is regulated by control ratio valve 12 by PLC controller.
Holding pressure control: in the time that slide block runs to the S4 in approach switch 15, slide block 20 is out of service, starts to stop pressurize, through the time delay of the time relay, after making slide block 20 stop pressurize certain hour, return, slide block 20 was regulated by the time relay in the time of staying at bottom dead centre place again.
Control slide block 20 backhauls: when slide block 20 is pressed after setting up time stop at bottom dead centre, the time relay signals, PLC controller makes magnetic valve YV1, magnetic valve YV3, magnetic valve YV7 obtain electric, now slide block 20 does not have outer load, system pressure declines, and variable displacement with constant power pump discharge 2 rises to maximum, and external control prefill valve 19 is opened, the epicoele of master cylinder 14 and fuel tank 1 are connected, slide block 20 quick returns; In the time that slide block 20 runs to the S1 in approach switch 15, PLC controller makes all magnetic valves all must not electricity, and the epicoele of the piston cylinder of master cylinder 14 and cavity of resorption seal, and slide block 20 is out of service, and variable displacement with constant power pump 2 is through inserted valve 3 off-loads.

Claims (4)

1. a hydraulic control system, comprise master cylinder (14) and fuel tank (1), the piston cylinder of described master cylinder (14) is connected with slide block (20), it is characterized in that: also comprise the descending of piston cylinder connection sliding block (20) for controlling master cylinder (14), backhaul, downstream rate, the PLC controller of pressure, the direction of stretching out at the piston cylinder of described master cylinder (14) is provided with approach switch (15), described fuel tank (1) is successively by variable displacement with constant power pump (2), inserted valve (3), overflow valve (4), two position four-way solenoid valves (5), check valve (6), band shuttle valve inserted valve (8), choke valve (13), proportioning valve (12) connects the hydraulic fluid port one (16) of described master cylinder (14), described band shuttle valve inserted valve (8) limits inserted valve (9) (3) by tape travel successively, 2/2-way magnetic valve (10) connects the oil-out two (17) of described master cylinder (14), described fuel tank (1) connects the hydraulic fluid port three (18) of described master cylinder (14) by external control prefill valve (19).
2. hydraulic control system as claimed in claim 1, it is characterized in that: the changes in flow rate that the downstream rate of described slide block (20) is caused the variation of load by variable displacement with constant power pump (2) is controlled, described pressure is regulated by control ratio valve (12) by PLC controller.
3. hydraulic control system as claimed in claim 1 or 2, it is characterized in that: described check valve (6) is provided with Pressure gauge (7) with the oil circuit that is connected between band shuttle valve inserted valve (8), the oil circuit that is connected between the hydraulic fluid port one (16) of described proportioning valve (12) and master cylinder (14) is provided with pressure sensor (11).
4. hydraulic control system as claimed in claim 1 or 2, is characterized in that: described master cylinder (14) is fixed in the fuselage of hydraulic press.
CN201210502631.4A 2012-11-30 2012-11-30 Hydraulic control system Active CN103847128B (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN201210502631.4A CN103847128B (en) 2012-11-30 2012-11-30 Hydraulic control system

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN201210502631.4A CN103847128B (en) 2012-11-30 2012-11-30 Hydraulic control system

Publications (2)

Publication Number Publication Date
CN103847128A true CN103847128A (en) 2014-06-11
CN103847128B CN103847128B (en) 2015-11-18

Family

ID=50855477

Family Applications (1)

Application Number Title Priority Date Filing Date
CN201210502631.4A Active CN103847128B (en) 2012-11-30 2012-11-30 Hydraulic control system

Country Status (1)

Country Link
CN (1) CN103847128B (en)

Cited By (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN104121255A (en) * 2014-07-18 2014-10-29 国家电网公司 Electric-hydraulic proportional loop system
CN104267630A (en) * 2014-10-10 2015-01-07 北京机械设备研究所 Electric cylinder control method for crossing interception system
CN105715629A (en) * 2014-07-18 2016-06-29 江苏省电力公司南通供电公司 Control method for electric-hydraulic proportional loop system reasonable in structure
CN105782139A (en) * 2014-07-18 2016-07-20 江苏省电力公司南通供电公司 Electric-hydraulic proportional loop system capable of effectively improving pressing performance
CN106438524A (en) * 2016-08-17 2017-02-22 南通皋液液压机有限公司 Jacking cylinder control hydraulic system
CN106438522A (en) * 2016-08-17 2017-02-22 南通皋液液压机有限公司 Main oil cylinder hydraulic control oil circuit for bellows test system
CN106762927A (en) * 2016-12-12 2017-05-31 天津商企生产力促进有限公司 Electromechanical organisation of working with backhaul decompression function
CN109790855A (en) * 2016-10-05 2019-05-21 贺尔碧格自动化技术控股股份有限公司 Electric-liquid type driving unit
CN110185663A (en) * 2019-05-30 2019-08-30 西安交通大学 The adding of a kind of local loading carries the hydraulic closed-loop control system of step formula press machine

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN105736492B (en) * 2016-04-14 2018-01-26 刘湖南 A kind of hydraulic jack and its oil piping system

Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2007144455A (en) * 2005-11-28 2007-06-14 Bridgestone Corp Speed controller for multiple cylinder type press
RU2307738C1 (en) * 2005-12-01 2007-10-10 Федеральное Государственное Унитарное Предприятие "Красноармейский Научно-Исследовательский Институт Механизации" Hydraulic press
KR20100024374A (en) * 2008-08-25 2010-03-05 페인툴 인텔렉츄얼 프로퍼티 에이쥐 Method and device for controlling the synchronization of cylinder/piston units and for reducing pressure peaks during forming and/or fineblanking on a fineblanking or stamping press
WO2011003506A1 (en) * 2009-07-09 2011-01-13 Robert Bosch Gmbh Electro-hydraulic controller
CN102303421A (en) * 2011-09-20 2012-01-04 天津市天锻压力机有限公司 System and method for controlling running speed of hydraulic press
CN202438593U (en) * 2012-02-03 2012-09-19 山东法因数控机械股份有限公司 Hydraulic control system for controlling punch press punching process
CN203019708U (en) * 2012-11-30 2013-06-26 江苏沃得机电集团有限公司 Hydraulic control system

Patent Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2007144455A (en) * 2005-11-28 2007-06-14 Bridgestone Corp Speed controller for multiple cylinder type press
RU2307738C1 (en) * 2005-12-01 2007-10-10 Федеральное Государственное Унитарное Предприятие "Красноармейский Научно-Исследовательский Институт Механизации" Hydraulic press
KR20100024374A (en) * 2008-08-25 2010-03-05 페인툴 인텔렉츄얼 프로퍼티 에이쥐 Method and device for controlling the synchronization of cylinder/piston units and for reducing pressure peaks during forming and/or fineblanking on a fineblanking or stamping press
WO2011003506A1 (en) * 2009-07-09 2011-01-13 Robert Bosch Gmbh Electro-hydraulic controller
CN102303421A (en) * 2011-09-20 2012-01-04 天津市天锻压力机有限公司 System and method for controlling running speed of hydraulic press
CN202438593U (en) * 2012-02-03 2012-09-19 山东法因数控机械股份有限公司 Hydraulic control system for controlling punch press punching process
CN203019708U (en) * 2012-11-30 2013-06-26 江苏沃得机电集团有限公司 Hydraulic control system

Cited By (17)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN105805061A (en) * 2014-07-18 2016-07-27 江苏省电力公司南通供电公司 Control method of electro-hydraulic proportion loop system with reasonable structure
CN104121255B (en) * 2014-07-18 2016-08-17 国家电网公司 Electric-hydraulic proportion circuit system
CN105697462A (en) * 2014-07-18 2016-06-22 江苏省电力公司南通供电公司 Electro-hydraulic proportional loop system with good working effect
CN105697471A (en) * 2014-07-18 2016-06-22 江苏省电力公司南通供电公司 Control method of electro-hydraulic proportional loop system with good working effect
CN105697473A (en) * 2014-07-18 2016-06-22 江苏省电力公司南通供电公司 Electro-hydraulic proportional loop system with reasonable structure
CN105715629A (en) * 2014-07-18 2016-06-29 江苏省电力公司南通供电公司 Control method for electric-hydraulic proportional loop system reasonable in structure
CN105782139A (en) * 2014-07-18 2016-07-20 江苏省电力公司南通供电公司 Electric-hydraulic proportional loop system capable of effectively improving pressing performance
CN104121255A (en) * 2014-07-18 2014-10-29 国家电网公司 Electric-hydraulic proportional loop system
CN104267630A (en) * 2014-10-10 2015-01-07 北京机械设备研究所 Electric cylinder control method for crossing interception system
CN104267630B (en) * 2014-10-10 2016-10-19 北京机械设备研究所 A kind of electric cylinder control method for road junction intercepting system
CN106438524A (en) * 2016-08-17 2017-02-22 南通皋液液压机有限公司 Jacking cylinder control hydraulic system
CN106438522A (en) * 2016-08-17 2017-02-22 南通皋液液压机有限公司 Main oil cylinder hydraulic control oil circuit for bellows test system
CN109790855A (en) * 2016-10-05 2019-05-21 贺尔碧格自动化技术控股股份有限公司 Electric-liquid type driving unit
CN109790855B (en) * 2016-10-05 2020-09-08 贺尔碧格自动化技术控股股份有限公司 Electrohydraulic drive unit
CN106762927A (en) * 2016-12-12 2017-05-31 天津商企生产力促进有限公司 Electromechanical organisation of working with backhaul decompression function
CN110185663A (en) * 2019-05-30 2019-08-30 西安交通大学 The adding of a kind of local loading carries the hydraulic closed-loop control system of step formula press machine
CN110185663B (en) * 2019-05-30 2020-06-16 西安交通大学 Local-loading multi-loading step type press hydraulic closed-loop control system

Also Published As

Publication number Publication date
CN103847128B (en) 2015-11-18

Similar Documents

Publication Publication Date Title
CN103847128A (en) Hydraulic control system
CN203019708U (en) Hydraulic control system
CN103552276B (en) Slide block control system of hydraulic machine
CN103801751B (en) Based on the fully-automatic plate shearing machine hydraulic system that PLC controls
CN203623016U (en) Hydraulic system of hydraulic machine
CN204476884U (en) A kind of hydraulic system of polyurethane handrail joint moulding press
CN102410272A (en) Electrohydraulic servo bending machine hydraulic system
CN103807239A (en) Dual output shaft motor based shear plate synchronous control hydraulic system
CN101870160B (en) Pump-valve compound control hydraulic system for injection molding machine and control method thereof
CN202851484U (en) Hydraulic lift system of high-low pressure controlled trolley
CN204267432U (en) Steel pipe finishing machine electric-hydraulic proportion hydraulic control system
CN201645777U (en) Pump-valve composite control hydraulic system for injection molding machine
CN104307953B (en) A kind of multistage relief circuit for large-tonnage full-automatic hydraulic fine impact machine controls system
CN203696090U (en) Full-automatic plate shearer hydraulic system based on PLC (programmable logic controller) control
CN203879827U (en) Servo drive hydraulic system
CN104100590A (en) Jacking hydraulic system and jacking and back-jacking methods thereof
CN107605814A (en) Energy-saving tyre vulcanizer open mold hydraulic servo control system
CN202360493U (en) Hydraulic system of electro-hydraulic servo bending machine
CN203992579U (en) Hydraulic system of cutting machine
CN104279198A (en) Anti-collision sudden stop hydraulic system of hydraulic cylinder of grinding machine and control method of anti-collision sudden stop hydraulic system
CN103148041A (en) Energy-saving active/passive load double electrohydraulic servo valve control system and control method thereof
CN103660061B (en) Banbury hydraulic control device
CN202360494U (en) Bending machine hydraulic system
CN203717500U (en) Plate shearing synchronous hydraulic control system based on double-output-shaft motor
CN105522749A (en) Sub-manifold block with adjustable pressing speed of hydraulic machine and speed adjusting method

Legal Events

Date Code Title Description
C06 Publication
PB01 Publication
C10 Entry into substantive examination
SE01 Entry into force of request for substantive examination
C14 Grant of patent or utility model
GR01 Patent grant
TR01 Transfer of patent right
TR01 Transfer of patent right

Effective date of registration: 20210601

Address after: 212300 danbei Town, Danyang City, Zhenjiang City, Jiangsu Province

Patentee after: WORLD PRECISE MACHINERY (CHINA) Co.,Ltd.

Address before: 212311 in Yicheng Town Industrial Park, Danyang City, Zhenjiang City, Jiangsu Province

Patentee before: JIANGSU WORLD ELECTROMECHANICAL Co.,Ltd.