CN104405733A - Sliding block balance electro-hydraulic servo synchronous control system of bending machine - Google Patents
Sliding block balance electro-hydraulic servo synchronous control system of bending machine Download PDFInfo
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- CN104405733A CN104405733A CN201410481964.2A CN201410481964A CN104405733A CN 104405733 A CN104405733 A CN 104405733A CN 201410481964 A CN201410481964 A CN 201410481964A CN 104405733 A CN104405733 A CN 104405733A
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- control system
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- solenoid directional
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Classifications
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- 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
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- 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
- F15B13/00—Details of servomotor systems ; Valves for servomotor systems
- F15B13/02—Fluid distribution or supply devices characterised by their adaptation to the control of servomotors
- F15B13/022—Flow-dividers; Priority valves
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- 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
- F15B21/00—Common features of fluid actuator systems; Fluid-pressure actuator systems or details thereof, not covered by any other group of this subclass
- F15B21/08—Servomotor systems incorporating electrically operated control means
- F15B21/087—Control strategy, e.g. with block diagram
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- 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
- F15B2211/00—Circuits for servomotor systems
- F15B2211/40—Flow control
- F15B2211/405—Flow control characterised by the type of flow control means or valve
- F15B2211/40523—Flow control characterised by the type of flow control means or valve with flow dividers
- F15B2211/4053—Flow control characterised by the type of flow control means or valve with flow dividers using valves
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- Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- Fluid Mechanics (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Analytical Chemistry (AREA)
- Fluid-Pressure Circuits (AREA)
Abstract
The invention discloses a sliding block balance electro-hydraulic servo synchronous control system of a bending machine. An oil tank is connected with a filter; the filter is connected with a quantitative hydraulic pump; the shaft end of the quantitative hydraulic pump is connected with a motor; the pump port of the quantitative hydraulic pump is connected with an inlet pipe of a diverter valve; and the system further comprises two electromagnetic speed regulating valves connected with two oil outlets of the diverter valve, first and second flow meters mounted on two branch oil pipes, two electromagnetic reversing valves mounted on two branches, hydraulic cylinders mounted at the two sides of the upper side of a sliding block, grating ruler displacement sensors arranged at the two sides of the sliding block, a programmable logic controller PLC with a PID adjusting function, a power supply and the like. The system is reasonable in design and simple in assembly and regulation, can realize synchronous vertical movement of the two ends of the sliding block, is excellent in balance, and has the characteristics of strong unbalance loading resistance and high control precision.
Description
Technical field
The present invention relates to bender technical field, be specifically related to a kind of slider of bender balance electro-hydraulic servo synchronous control system.
Background technique
The slider of bender balanced synchronization control gear of prior art, axle synchronization control turned round by the main machinery that adopts, or adopts electro-hydraulic servo control.At present, for in slider of bender balanced synchronization control gear, it is poor that axle sync control device offset load resistance turned round by machinery, control accuracy is low, only adapt to the hydraulic bending press being used for middle side crops industry, and machinery is when turning round axle Synchronous Bending machine bending wide plate, bending angle and bending straightness accuracy can not reach good effect; Electro-hydraulic servo control device offset load resistance is strong, control accuracy is high, but owing to adopting being synchronized with the movement of two electro-hydraulic proportional valve or two servo valve control two oil hydraulic cylinder, expensive, manufacture cost is high, and it is all higher to hydraulic oil, electrical network and operator quality.
Summary of the invention
The object of this invention is to provide a kind of slider of bender balance electro-hydraulic servo synchronous control system, to solve in existing hydraulic bending press slide block balanced synchronization control gear, machinery turns round that offset load resistance existing for axle synchronization control is poor, control accuracy is low and complex structure existing for general electro-hydraulic servo control, problem that manufacture cost is high.This system have reasonable in design, assembling regulate simple, offset load resistance is strong, control accuracy is high, easy to maintenance, performance and price compares high.
In order to solve the problem existing for background technique, the present invention is by the following technical solutions:
A kind of hydraulic bending press slide block balance electro-hydraulic servo synchronous control system, described slider electrical liquid synchro system comprises hydraulic control system and electric control system, described hydraulic control system comprises fuel tank, filter, quantitative hydraulic pump, motor, pilot operated compound relief valve, diverter valve, the first electromagnetic speed-adjusting valve, the second electromagnetic speed-adjusting valve, first-class gauge, second gauge, the first solenoid directional control valve, the second solenoid directional control valve, the first oil hydraulic cylinder, the second oil hydraulic cylinder, described fuel tank connects described filter, described filter connects described quantitative hydraulic pump, described quantitative hydraulic pump axle head connects described motor, described quantitative hydraulic pump pumping hole connects the inlet tube of diverter valve, two oil outlet tubes of described diverter valve connect the first electromagnetic speed-adjusting valve and the second electromagnetic speed-adjusting valve respectively, described first electromagnetic speed-adjusting valve connects first-class gauge, described second electromagnetic speed-adjusting valve connects second gauge, described first-class gauge place branch road connects the first solenoid directional control valve, described second gauge place branch road connects the second solenoid directional control valve, described first solenoid directional control valve connects the second oil hydraulic cylinder, described second solenoid directional control valve connects the first oil hydraulic cylinder, described electric control system comprises and is arranged on PLC, the power supply that the first grating scale displacement transducer of inner side and the second grating scale displacement transducer, band PID regulatory function are takeed in slide block top two, described power supply is connected with PLC, the counter module output terminal that described PLC carries is connected with the first grating scale displacement transducer and the second grating scale displacement transducer respectively, grating scale displacement transducer output digit signals, the counter module of PLC receives this signal, the analog module input end that described PLC carries is connected with first-class gauge and second gauge respectively, flowmeter output current signal, current signal enters the analog module of PLC, the present invention adopts said system, and diverter valve controls two hydraulic cylinder synchronous motions, and its structure is simple, cost is low, easy to manufacture, reliability is strong, adopt the control of programmable controller PLC and sensor combination to have offset load resistance is strong, control accuracy is high, PLC regulates the advantage that the response of the flow speed in diverter valve is fast, easy to maintenance, price performance is high simultaneously.
Further, between described quantitative hydraulic pump and described diverter valve, pilot operated compound relief valve is housed, described pilot operated compound relief valve comprises main valve and pilot valve two-part.This pilot operated compound relief valve effect is that metering pump provides constant flow rate in this synchronous control system, when system pressure increases, traffic demand can be made to reduce, and now relief valve is opened, and excess traffic is overflow oil sump tank, ensure relief valve inlet pressure, namely pump discharge pressure is constant.When the systems are operating normally, valve closing, opens overflow when only having load to exceed the limit of regulation, carries out overload protection, system pressure is no longer increased.
Further, the composition of described diverter valve mainly comprises valve body, the centralizing spring controlling spool and control on spool; Described diverter valve valve body has a filler opening and two oil outlets, control the axis of spool and the dead in line of centralizing spring, be arranged on valve inner, the bypass flow of centralizing spring and two oil outlet flowings remains on meta according to its Stress control spool.The diverter valve of this improvement controls two hydraulic cylinder synchronous motions, controls the flow on two pipelines, and exports to diverter valve, regulate diverter valve two oil outlet flow by PLC.
Further, M shape all selected by described first solenoid directional control valve, the second solenoid directional control valve, and when meta, the actuator port of this solenoid directional control valve cuts out, and filler opening, return opening are directly connected.The effect of this improvement is that operation mechanism can keep static because actuator port is closed; More steady from stopping to starting; During oil pump off-load, oil hydraulic cylinder can be locked.
Further, described first-class gauge, second gauge are arranged on two branch road oil pipes respectively; Described first oil hydraulic cylinder, the second oil hydraulic cylinder are arranged on the outside that slide block top two is takeed on respectively, and described slide block 17 is arranged on above worktable; This scheme can realize slide block two ends and can synchronously move up and down, and meets the requirement of its balance.
Further, described oil hydraulic cylinder comprises cylinder body, piston rod, and described cylinder body side upper and lower end is respectively provided with a through hole, and described through hole is connected with solenoid directional control valve; Described piston rod bottom and slide block top two are takeed on corresponding surface and are connected.This improvement has reasonable in design, the simple feature of assembling adjustment.
The invention has the beneficial effects as follows: the present invention adopts said system, diverter valve controls two hydraulic cylinder synchronous motions, and its structure is simple, cost is low, easy to manufacture, reliability is strong.The pilot operated compound relief valve adopted has the effect of level pressure overflow and overload protection.M shape solenoid directional control valve operation mechanism when meta can keep static, ensure that the stability of a system.Said system can realize slide block two ends and can synchronously move up and down, and meets the requirement of its balance.In addition, the present invention has the features such as reasonable in design, assembling regulates simply, offset load resistance is strong, control accuracy is high, improve the quality of products.
Accompanying drawing explanation
Fig. 1 is a kind of slider of bender balance electro-hydraulic servo synchronous control system structural representation.
In figure: 1-fuel tank, 2-filter, 3-quantitative hydraulic pump, 4-motor, 5-pilot operated compound relief valve, 6-diverter valve, 7-first electromagnetic speed-adjusting valve, 8-second electromagnetic speed-adjusting valve, the first-class gauge of 9-, 10-second gauge, 11-first solenoid directional control valve, 12-second solenoid directional control valve, 13-first oil hydraulic cylinder, 14-second oil hydraulic cylinder, 15-first grating scale displacement transducer, 16-second grating scale displacement transducer, 17-slide block, 18-PLC programmable controller.
Specific embodiments
Below in conjunction with embodiment, the invention will be further described.
As shown in Figure 1, a kind of hydraulic bending press slide block balance electro-hydraulic servo synchronous control system, described slider electrical liquid synchro system comprises hydraulic control system and electric control system, described hydraulic control system comprises fuel tank 1, filter 2, quantitative hydraulic pump 3, motor 4, pilot operated compound relief valve 5, diverter valve 6, first electromagnetic speed-adjusting valve 7, second electromagnetic speed-adjusting valve 8, first-class gauge 9, second gauge 10, first solenoid directional control valve 11, second solenoid directional control valve 12, first oil hydraulic cylinder 13, second oil hydraulic cylinder 14, described fuel tank 1 connects described filter 2, described filter 2 connects described quantitative hydraulic pump 3, described quantitative hydraulic pump 3 axle head connects described motor 4, described quantitative hydraulic pump 3 pumping hole connects the inlet tube of diverter valve 6, two oil outlet tubes of described diverter valve 6 connect the first electromagnetic speed-adjusting valve 7 and the second electromagnetic speed-adjusting valve 8 respectively, described first electromagnetic speed-adjusting valve 7 connects first-class gauge 9, described second electromagnetic speed-adjusting valve 8 connects second gauge 10, described first-class gauge 9 place branch road connects the first solenoid directional control valve 11, described second gauge 10 place branch road connects the second solenoid directional control valve 12, described first solenoid directional control valve 11 connects the second oil hydraulic cylinder 14, described second solenoid directional control valve 12 connects the first oil hydraulic cylinder 13, described electric control system comprises PLC18, the power supply 19 of the first grating scale displacement transducer 15 of being arranged on shoulder inner side, slide block 17 top two and the second grating scale displacement transducer 16, band PID regulatory function, described power supply 19 is connected with PLC18, the counter module output terminal that described PLC18 carries is connected with the first grating scale displacement transducer 15 and the second grating scale displacement transducer 16 respectively, grating scale displacement transducer output digit signals, the counter module of PLC18 receives this signal, the analog module input end that described PLC18 carries is connected with first-class gauge 9 and second gauge 10 respectively, flowmeter output current signal, and current signal enters the analog module of PLC18.
Damping hole on the pilot valve of described pilot operated compound relief valve 5, main valve plug and pressure adjusting spring form pilot stage half-bridge partial pressure type pressure negative feedback control together, are responsible for providing the command pressure of the main after pilot valve voltage stabilizing to main valve plug epicoele.Main valve is the comparator of main control loop, and upper-end surface effect has the command force of main valve plug, and lower end surface is as the piezometric surface of major loop, and effect has feedback force, and its actuatable valve core of making a concerted effort, regulates the size of flow-off, carry out pressure regulation and voltage stabilizing.
Described first solenoid directional control valve 11 and the second solenoid directional control valve 12 comprise valve body, spool, electromagnet, spring and hydraulic fluid port; Have undercut groove in valve body, the axis of spool and the dead in line of spring, be arranged on valve inner, and the step of spool coordinates with the undercut groove of valve body, and spool both sides respectively configure an electromagnet, the making a concerted effort of electromagnetic force and spring force controls valve core movement.
Described oil hydraulic cylinder is provided with cylinder body and piston rod, and the cylinder body of each oil hydraulic cylinder is connected with the frame at the upper side of slide block, and bottom and the slide block two of the piston rod of each oil cylinder are takeed on corresponding top and be connected, and can pass through rivet interlacement.
On Power supply, described power supply 19 is connected with PLC18, and for PLC18 provides 220V Ac, the power output end of PLC18 is connected with grating scale displacement transducer 15 and grating scale displacement transducer 16, for grating scale displacement transducer provides 24V direct current.Grating scale displacement transducer output digit signals, PLC18 receives this signal.
Working principle of the present invention and working procedure are:
Motor 4 drives quantitative hydraulic pump 3 hydraulic oil in fuel tank 1 to be input to the oil inlet pipe of diverter valve 6 through pilot operated compound relief valve 5, can change from the total discharge in in-line within the specific limits and be divided into two parts.Pilot operated compound relief valve 5 has the effect of level pressure overflow and overload protection.Two branch roads respectively through electromagnetic speed-adjusting valve 7,8, flowmeter 9,10, selector valve 11,12 is connected with two oil hydraulic cylinders 13,14, to ensure that two oil hydraulic cylinders move simultaneously.Controlled flow and the pressure of slide block 17 both sides oil hydraulic cylinder 13,14 by closed loop electrohydraulic control system, guarantee positioning precision that slide block is high, both sides be synchronized with the movement and bender at unbalance loading operating mode bottom slide block two ends stress balance.
Described diverter valve 6 controls two hydraulic cylinder synchronous motions, the flow on two pipelines measured respectively by two flowmeters be arranged in diverter valve outlet line, and by PID that the flow feedback recorded carries to PLC18, the analog signals exported after PID arithmetic converts voltage signal to through PLC18, and export to diverter valve, regulate diverter valve two oil outlet flow; The grating scale being arranged on slide block both sides measures the position of slide block respectively, and by signal feed back to PLC18, PLC18 by after the signal transacting that obtains, export to two modulating valve, the oil outlet flow of adjustment two modulating valve, finely tunes, thus ensures two hydraulic cylinder synchronous motions.
When the electromagnet YA2 of two the first solenoid directional control valves 9 and electromagnet YA4 of the second solenoid directional control valve 10 is energized, right position all located by two valves, hydraulic oil is through quantitative hydraulic pump and diverter valve, the rodless cavity of the first oil hydraulic cylinder 13 and the second oil hydraulic cylinder 14 is entered again respectively through electromagnetic speed-adjusting valve, flowmeter, selector valve, the piston rod of two oil hydraulic cylinders moves downward, band movable slider moves downward, and slide block is in process; When the electromagnet YA1 of the first solenoid directional control valve 9 and electromagnet YA3 of the second solenoid directional control valve 10 is energized, left position all located by valve, hydraulic oil is through quantitative hydraulic pump and diverter valve, the rod chamber of the first oil hydraulic cylinder 13 and the second oil hydraulic cylinder 14 is entered again respectively through modulating valve, flowmeter, selector valve, the piston rod of two oil hydraulic cylinders moves upward, band movable slider moves upward, and slide block is in backhaul.
When the bypass flow of diverter valve 6 two oil outlets is equal, control spool is remained on meta according to its pressure by the centralizing spring of diverter valve 6, now, two oil hydraulic cylinders can keep being synchronized with the movement, when the bypass flow of diverter valve 6 two oil outlets is unequal, the flow on two pipelines measured respectively by two flowmeters be arranged in diverter valve 6 outlet line, and the analog module of the PID that the flow feedback recorded is carried to PLC18, the analog signals exported after PID arithmetic converts voltage signal to through PLC18, and export to diverter valve 6, regulate diverter valve 6 liang of oil outlet flows, the grating scale being arranged on slide block 17 both sides measures the position of slide block 17 respectively, and by signal feed back to PLC18, PLC18 by after the signal transacting that obtains, export to two modulating valve, the oil outlet flow of adjustment two modulating valve, thus ensure two hydraulic cylinder synchronous motions.
Above-mentioned synchronous control system realizes except PID control except adopting the closed loop control module of programmable controller (PLC), can also to be adjusted by intellectuality or self-correcting, adaptive algorithm realize the automatic adjustment of PID controller parameter, thus to realize the flow control of modulating valve.
The present invention adopts said system, and diverter valve controls two hydraulic cylinder synchronous motions, and its structure is simple, cost is low, easy to manufacture, reliability is strong.The pilot operated compound relief valve adopted has the effect of level pressure overflow and overload protection.M shape solenoid directional control valve operation mechanism when meta can keep static, ensure that the stability of a system.Said system can realize slide block two ends and can synchronously move up and down, and meets the requirement of its balance.In addition, the present invention has the features such as reasonable in design, assembling regulates simply, offset load resistance is strong, control accuracy is high, improve the quality of products.
The present invention can also have other mode of executions, and the technological scheme formed with equivalent transformation is replaced in all employings on an equal basis, all drops within the scope of protection of present invention.
Claims (6)
1. a hydraulic bending press slide block balance electro-hydraulic servo synchronous control system, is characterized in that: comprise hydraulic control system and electric control system;
Described hydraulic control system comprises fuel tank (1), filter (2), quantitative hydraulic pump (3), motor (4), pilot operated compound relief valve (5), diverter valve (6), the first electromagnetic speed-adjusting valve (7), the second electromagnetic speed-adjusting valve (8), first-class gauge (9), second gauge (10), the first solenoid directional control valve (11), the second solenoid directional control valve (12), the first oil hydraulic cylinder (13), the second oil hydraulic cylinder (14);
(1 connects described filter (2) to described fuel tank, described filter (2) connects described quantitative hydraulic pump (3), described quantitative hydraulic pump (3) axle head connects described motor (4), described quantitative hydraulic pump (3) pumping hole connects the inlet tube of diverter valve (6), two oil outlet tubes of described diverter valve (6) connect the first electromagnetic speed-adjusting valve (7) and the second electromagnetic speed-adjusting valve (8) respectively, described first electromagnetic speed-adjusting valve (7) connects first-class gauge (9), described second electromagnetic speed-adjusting valve (8) connects second gauge (10), described first-class gauge (9) place branch road connects the first solenoid directional control valve (11), described second gauge (10) place branch road connects the second solenoid directional control valve (12), described first solenoid directional control valve (11) connects the second oil hydraulic cylinder (14), described second solenoid directional control valve (12) connects the first oil hydraulic cylinder (13),
Described electric control system comprises the first grating scale displacement transducer (15) of being arranged on shoulder inner side, slide block (17) top two and the second grating scale displacement transducer (16), is with PLC (18), the power supply (19) of PID regulatory function;
Described power supply (19) is connected with PLC (18), the counter module input end that described PLC (18) carries is connected with the first grating scale displacement transducer (15) and the second grating scale displacement transducer (16) respectively, grating scale displacement transducer output digit signals, the counter module of PLC (18) receives this signal; The analog module input end that described PLC (18) carries is connected with first-class gauge (9) and second gauge (10) respectively, flowmeter output current signal, current signal enters the analog module of PLC (18).
2. hydraulic bending press slide block balance electro-hydraulic servo synchronous control system according to claim 1, it is characterized in that: pilot operated compound relief valve (5) is housed between described quantitative hydraulic pump (3) and described diverter valve (6), described pilot operated compound relief valve (5) comprises main valve and pilot valve two-part.
3. hydraulic bending press slide block balance electro-hydraulic servo synchronous control system according to claim 1, is characterized in that: the composition of described diverter valve (6) mainly comprises valve body, the centralizing spring controlling spool and control on spool; Described diverter valve (6) valve body has a filler opening and two oil outlets, control the axis of spool and the dead in line of centralizing spring, be arranged on valve inner, the bypass flow of centralizing spring and two oil outlet flowings remains on meta according to its Stress control spool.
4. hydraulic bending press slide block balance electro-hydraulic servo synchronous control system according to claim 1, it is characterized in that: described first solenoid directional control valve (11), the second solenoid directional control valve (12) all select M shape, when meta, the actuator port of described solenoid directional control valve cuts out, and filler opening, return opening are directly connected.
5. hydraulic bending press slide block balance electro-hydraulic servo synchronous control system according to claim 1, is characterized in that: described first-class gauge (9), second gauge (10) are arranged on two branch road oil pipes respectively; Described first oil hydraulic cylinder (13), the second oil hydraulic cylinder (14) are arranged on the outside of slide block (17) top two shoulder respectively, and described slide block (17) is arranged on above worktable.
6. hydraulic bending press slide block balance electro-hydraulic servo synchronous control system according to claim 1, it is characterized in that: described oil hydraulic cylinder comprises cylinder body, piston rod, described cylinder body side upper and lower end is respectively provided with a through hole, and described through hole is connected with solenoid directional control valve; Described piston rod bottom is takeed on corresponding surface with slide block (17) top two and is connected.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410481964.2A CN104405733B (en) | 2014-09-19 | 2014-09-19 | A kind of slider of bender balances electro-hydraulic servo synchronous control system |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410481964.2A CN104405733B (en) | 2014-09-19 | 2014-09-19 | A kind of slider of bender balances electro-hydraulic servo synchronous control system |
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| CN104405733A true CN104405733A (en) | 2015-03-11 |
| CN104405733B CN104405733B (en) | 2017-10-20 |
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Cited By (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104879335A (en) * | 2015-06-11 | 2015-09-02 | 上海工程技术大学 | Synchronous control system and control method for multiple hydraulic cylinders |
| CN104998933A (en) * | 2015-07-14 | 2015-10-28 | 绍兴市安雅信自动化技术有限公司 | Control method of dual-machine linkage torsion axis bending machine |
| CN105057412A (en) * | 2015-08-24 | 2015-11-18 | 江苏中海重型机床有限公司 | Equal-height adjusting device for bending machine and bending machine |
| CN105729194A (en) * | 2016-04-28 | 2016-07-06 | 黄斌 | Synchronous hydraulic positioning and clamping device for mobile phone shell machining |
| CN107327431A (en) * | 2017-08-31 | 2017-11-07 | 雷沃重工股份有限公司 | One kind shunting multichannel valve module |
| CN107831734A (en) * | 2017-11-17 | 2018-03-23 | 广船国际有限公司 | The controller and control method of numerical control bender, device, equipment and storage medium |
| CN108331793A (en) * | 2018-02-07 | 2018-07-27 | 安徽工程大学 | A kind of hydraulic shunting system of circuit control pressure proportional |
| CN108374809A (en) * | 2018-05-08 | 2018-08-07 | 安徽工程大学 | It is a kind of to utilize servo-controlled hydraulic synchronization circuit correction rule method for building up |
| CN108869466A (en) * | 2018-08-27 | 2018-11-23 | 江苏大学 | A kind of hydraulic system of bi-directional synchronization |
| CN113579028A (en) * | 2021-07-20 | 2021-11-02 | 深圳市合信自动化技术有限公司 | Test equipment for simulating electro-hydraulic and full-electric servo bending machine |
| CN114087247A (en) * | 2021-11-30 | 2022-02-25 | 中色科技股份有限公司 | Self-synchronizing hydraulic system of aluminum strip sewing machine |
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Cited By (12)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104879335A (en) * | 2015-06-11 | 2015-09-02 | 上海工程技术大学 | Synchronous control system and control method for multiple hydraulic cylinders |
| CN104879335B (en) * | 2015-06-11 | 2017-09-26 | 上海工程技术大学 | A kind of multi-hydraulic-cylinder synchronous control system and its control method |
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| CN105729194A (en) * | 2016-04-28 | 2016-07-06 | 黄斌 | Synchronous hydraulic positioning and clamping device for mobile phone shell machining |
| CN107327431A (en) * | 2017-08-31 | 2017-11-07 | 雷沃重工股份有限公司 | One kind shunting multichannel valve module |
| CN107831734A (en) * | 2017-11-17 | 2018-03-23 | 广船国际有限公司 | The controller and control method of numerical control bender, device, equipment and storage medium |
| CN108331793A (en) * | 2018-02-07 | 2018-07-27 | 安徽工程大学 | A kind of hydraulic shunting system of circuit control pressure proportional |
| CN108374809A (en) * | 2018-05-08 | 2018-08-07 | 安徽工程大学 | It is a kind of to utilize servo-controlled hydraulic synchronization circuit correction rule method for building up |
| CN108869466A (en) * | 2018-08-27 | 2018-11-23 | 江苏大学 | A kind of hydraulic system of bi-directional synchronization |
| CN113579028A (en) * | 2021-07-20 | 2021-11-02 | 深圳市合信自动化技术有限公司 | Test equipment for simulating electro-hydraulic and full-electric servo bending machine |
| CN114087247A (en) * | 2021-11-30 | 2022-02-25 | 中色科技股份有限公司 | Self-synchronizing hydraulic system of aluminum strip sewing machine |
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|---|---|
| CN104405733B (en) | 2017-10-20 |
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