CN104405733B - A kind of slider of bender balances electro-hydraulic servo synchronous control system - Google Patents
A kind of slider of bender balances electro-hydraulic servo synchronous control system Download PDFInfo
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- CN104405733B CN104405733B CN201410481964.2A CN201410481964A CN104405733B CN 104405733 B CN104405733 B CN 104405733B CN 201410481964 A CN201410481964 A CN 201410481964A CN 104405733 B CN104405733 B CN 104405733B
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- valve
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- sliding block
- flow divider
- control valve
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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
Electro-hydraulic servo synchronous control system is balanced the invention discloses a kind of slider of bender, the fuel tank connects the filter, the filter connects the quantitative hydraulic pump, the quantitative hydraulic pump shaft end connects the motor, the quantitative hydraulic pump pumping hole connects the inlet tube of flow divider, and two connected electromagnetic speed-adjusting valves of two oil-outs of flow divider, the first second flowmeter on two branch road oil pipes, two solenoid directional control valves are respectively mounted on two branch roads, hydraulic cylinder installed in both sides above sliding block, it is arranged on the grating rule displacement sensor of sliding block both sides, programmable logic controller (PLC) PLC with PID regulatory functions, power supply etc..The present invention is reasonable in design, assembling regulation is simple, and the synchronization that sliding block two ends can be achieved is moved up and down, and balance has well that offset load resistance is strong, the high feature of control accuracy.
Description
Technical field
The present invention relates to bender technical field, and in particular to a kind of slider of bender balance electro-hydraulic servo Synchronization Control system
System.
Background technology
The slider of bender balanced synchronization control device of prior art, it is main that axle Synchronization Control is turned round using machinery, or adopt
Use electro-hydraulic servo control.It is presently used in slider of bender balanced synchronization control device, it is anti-inclined that machinery turns round axle sync control device
Loading capability is poor, and control accuracy is low, only adapts to the hydraulic bending press for middle side crops industry, and machinery turns round axle Synchronous Bending machine bending
During wide plate, bending angle and bending linearity can not reach good effect；Electro-hydraulic servo control device offset load resistance is strong, control
Precision processed is high, but due to being synchronized with the movement using double electro-hydraulic proportional valves or the hydraulic cylinder of double servo valve controls two, expensive, manufacture
Cost is high, and it is all higher to hydraulic oil, power network and operator quality.
The content of the invention
Electro-hydraulic servo synchronous control system is balanced it is an object of the invention to provide a kind of slider of bender, it is existing to solve
In hydraulic bending press sliding block balanced synchronization control device, the mechanical offset load resistance turned round present in axle Synchronization Control is poor, control essence
Degree is low and general electro-hydraulic servo control present in it is complicated, the problem of manufacturing cost is high.The system have it is reasonable in design,
Assembling adjusts the features such as simple, offset load resistance is strong, control accuracy is high, easy to maintenance, performance and price is higher.
In order to solve the problems existing in background technology, the present invention is to use following technical scheme：
A kind of hydraulic bending press sliding block balances electro-hydraulic servo synchronous control system, and the electro-hydraulic synchronization system of sliding block includes liquid
Pressure control system and electric control system；The hydraulic control system includes fuel tank, filter, quantitative hydraulic pump, motor, guide
Formula overflow valve, flow divider, the first electromagnetic speed-adjusting valve, the second electromagnetic speed-adjusting valve, first flowmeter, second flowmeter, the first electromagnetism
Reversal valve, the second solenoid directional control valve, first hydraulic cylinder, second hydraulic cylinder；The fuel tank connects the filter, the filter
The quantitative hydraulic pump is connected, the quantitative hydraulic pump shaft end connects the motor, the quantitative hydraulic pump pumping hole connection shunting
The inlet tube of valve, two flowlines of the flow divider connect the first electromagnetic speed-adjusting valve and the second electromagnetic speed-adjusting valve respectively, described
First electromagnetic speed-adjusting valve connects first flowmeter, and the second electromagnetic speed-adjusting valve connects second flowmeter, the first flowmeter
Place branch road connects the first solenoid directional control valve, and branch road connects the second solenoid directional control valve, described first where the second flowmeter
Solenoid directional control valve connects second hydraulic cylinder, and second solenoid directional control valve connects first hydraulic cylinder；The electric control system bag
Include the first grating scale displacement transducer being arranged on the inside of the shoulder of sliding block top two and second grating scale displacement transducer, band PID are adjusted
Save PLC, the power supply of function；The power supply is connected with PLC, the counter module output end that the PLC is carried respectively with the first light
Grid rule displacement sensor and the connection of second grating scale displacement transducer, grating rule displacement sensor output digit signals, PLC's
Counter module receives the signal, the analog module input that the PLC is carried respectively with first flowmeter and second flow
Meter connection, flowmeter output current signal, current signal enters PLC analog module；The present invention uses said system, shunting
Valve controls two hydraulic cylinder synchronous motions, and its simple in construction, cost is low, easy to manufacture, highly reliable；Use programmable control simultaneously
The control that device PLC and sensor processed are combined is fast with the flow that offset load resistance is strong, control accuracy is high, PLC is adjusted in flow divider
Degree responds the high advantage of fast, the easy to maintenance, ratio of performance to price.
Further, pilot operated compound relief valve, the pilot-operated type overflow are housed between the quantitative hydraulic pump and the flow divider
Valve includes main valve and pilot valve two parts.The pilot operated compound relief valve effect be in the synchronous control system, constant displacement pump provide
It is constant flow rate, when system pressure increases, traffic demand can be reduced, now overflow valve is opened, excess traffic is overflow oil return
Case, it is ensured that overflow valve inlet pressure, i.e. pump discharge pressure are constant.When the systems are operating normally, valve is closed, and only load exceedes
Overflow is opened during the defined limit, overload protection is carried out, system pressure is not further added by.
Further, the composition of the flow divider mainly includes the centralizing spring on valve body, control valve element and control valve element；Institute
State and an oil inlet and two oil-outs be provided with shunting valve body, the axis of control valve element is overlapped with the axis of centralizing spring,
Installed in valve inner, during the bypass flow of centralizing spring and two oil-out flowings is maintained at according to its Stress control valve element
Position.The improved flow divider controls two hydraulic cylinder synchronous motions, and the flow on two pipelines is controlled by PLC, and export to
Flow divider, adjusts the oil-out flow of flow divider two.
Further, first solenoid directional control valve, the second solenoid directional control valve select M shapes, in middle position, the electromagnetic switch
The actuator port of valve is closed, and oil inlet, oil return opening are joined directly together.The improved effect is due to actuator port closing, working machine
Structure can be with remains stationary；It is more steady from stopping to starting；Hydraulic cylinder can be locked during oil pump off-load.
Further, the first flowmeter, second flowmeter are separately mounted on two branch road oil pipes；First hydraulic pressure
Cylinder, second hydraulic cylinder are separately mounted to the outside of the shoulder of sliding block top two, and the sliding block 17 is arranged on above workbench；This scheme can
Realize that sliding block two ends can synchronously be moved up and down, meet the requirement of its balance.
Further, the hydraulic cylinder includes cylinder body, piston rod, and cylinder body side upper and lower side is respectively provided with a through hole, institute
Through hole is stated with solenoid directional control valve to be connected；The piston rod bottom surface corresponding with the shoulder of sliding block top two is connected.This changes
Enter the characteristics of adjusting simple with reasonable in design, assembling.
The beneficial effects of the invention are as follows：The present invention uses said system, and flow divider controls two hydraulic cylinder synchronous motions, its
Simple in construction, cost is low, easy to manufacture, highly reliable.The pilot operated compound relief valve of use has level pressure overflow and overload protection
Effect.Operating mechanism can be with remains stationary in middle position for M shapes solenoid directional control valve, it is ensured that the stability of a system.Said system can be real
Existing sliding block two ends can synchronously be moved up and down, and meet the requirement of its balance.In addition, there is the present invention reasonable in design, assembling to adjust
Section is simple, offset load resistance is strong, control accuracy is high, the features such as improve product quality.
Brief description of the drawings
Fig. 1 is that a kind of slider of bender balances electro-hydraulic servo synchronous control system structural representation.
In figure：1- fuel tanks, 2- filters, 3- quantitative hydraulic pumps, 4- motors, 5- pilot operated compound relief valves, 6- flow dividers, 7-
One electromagnetic speed-adjusting valve, the second electromagnetic speed-adjustings of 8- valve, 9- first flowmeters, 10- second flowmeters, the solenoid directional control valves of 11- first,
The solenoid directional control valves of 12- second, 13- first hydraulic cylinders, 14- second hydraulic cylinders, 15- first grating scales displacement transducer, 16- second
Grating rule displacement sensor, 17- sliding blocks, 18-PLC programmable controllers.
Embodiment
With reference to embodiment, the invention will be further described.
As shown in figure 1, a kind of hydraulic bending press sliding block balance electro-hydraulic servo synchronous control system, the electro-hydraulic synchronization of sliding block
System includes hydraulic control system and electric control system；The hydraulic control system includes fuel tank 1, filter 2, quantitative hydraulic
Pump 3, motor 4, pilot operated compound relief valve 5, flow divider 6, the first electromagnetic speed-adjusting valve 7, the second electromagnetic speed-adjusting valve 8, first flowmeter 9,
Second flowmeter 10, the first solenoid directional control valve 11, the second solenoid directional control valve 12, first hydraulic cylinder 13, second hydraulic cylinder 14；It is described
Fuel tank 1 connects the filter 2, and the filter 2 connects the quantitative hydraulic pump 3, and the shaft end of quantitative hydraulic pump 3 connects institute
Motor 4 is stated, the pumping hole of quantitative hydraulic pump 3 connects the inlet tube of flow divider 6, and two flowlines of the flow divider 6 connect respectively
Connect the first electromagnetic speed-adjusting valve 7 and the second electromagnetic speed-adjusting valve 8, the first electromagnetic speed-adjusting valve 7 connects first flowmeter 9, described the
Two electromagnetic speed-adjusting valves 8 connect second flowmeter 10, and the place branch road of first flowmeter 9 connects the first solenoid directional control valve 11, institute
State the place branch road of second flowmeter 10 and connect the second solenoid directional control valve 12, first solenoid directional control valve 11 connects second hydraulic cylinder
14, second solenoid directional control valve 12 connects first hydraulic cylinder 13；The electric control system includes being arranged on the top of sliding block 17
First grating scale displacement transducer 15 and second grating scale displacement transducer 16 on the inside of two shoulders, with PID regulatory functions
PLC18, power supply 19；The power supply 19 is connected with PLC18, and the counter module output end that the PLC18 is carried is respectively with first
Grating rule displacement sensor 15 and second grating scale displacement transducer 16 are connected, grating rule displacement sensor output digit signals,
PLC18 counter module receives the signal；The analog module input that the PLC18 is carried respectively with first flowmeter 9
Connected with second flowmeter 10, flowmeter output current signal, current signal enters PLC18 analog module.
Pilot valve, the damping hole on main valve plug and the pressure spring of the pilot operated compound relief valve 5 constitute pilot stage half together
Bridge partial pressure type pressure negative feedback control, is responsible for providing the main command pressure after pilot valve voltage stabilizing to main valve plug epicoele.It is main
Valve is the comparator of main control loop, and upper surface acts on the command force for having main valve plug, and lower surface is used as the piezometric surface of major loop, effect
There is feedback force, its actuatable valve core of making a concerted effort adjusts the size of overfall, carries out pressure regulation and voltage stabilizing.
The solenoid directional control valve 12 of first solenoid directional control valve 11 and second includes valve body, valve element, electromagnet, spring and oil
Mouthful；Undercut groove is provided with valve body, the axis of valve element is overlapped with the axis of spring, installed in valve inner, the step and valve of valve element
The undercut groove of body coordinates, and valve element both sides respectively configure the control valve core movement of making a concerted effort of an electromagnet, electromagnetic force and spring force.
Described hydraulic cylinder is provided with cylinder body and piston rod, and the cylinder body of each hydraulic cylinder is connected with the frame at the upper side of sliding block
Connect, the bottom top corresponding with the shoulder of sliding block two of the piston rod of each oil cylinder is connected, and can pass through rivet interlacement.
On power supply is powered, the power supply 19 is connected with PLC18, and 220V alternating currents, PLC18 power supply are provided for PLC18
Output end is connected with grating rule displacement sensor 15 and grating rule displacement sensor 16, and 24V is provided for grating rule displacement sensor
Direct current.Grating rule displacement sensor output digit signals, PLC18 receives the signal.
The present invention operation principle and the course of work be：
Hydraulic oil in fuel tank 1 is input to entering for flow divider 6 by the driving quantitative hydraulic pump 3 of motor 4 through pilot operated compound relief valve 5
Oil pipe, the total flow in in-line can change and be divided into two parts within the specific limits.Pilot operated compound relief valve 5 has
Level pressure overflow and the effect of overload protection.Two branch roads are respectively through electromagnetic speed-adjusting valve 7,8, flowmeter 9,10, reversal valve 11,12 and two
Individual hydraulic cylinder 13,14 is connected, to ensure that two hydraulic cylinders are moved simultaneously.Pass through the both sides liquid of closed loop electrohydraulic control system control slide block 17
The flow and pressure of cylinder pressure 13,14, it is ensured that the high positioning precision of sliding block, both sides be synchronized with the movement and bender is in unbalance loading operating mode
Sliding block two ends stress balance.
The flow divider 6 controls two hydraulic cylinder synchronous motions, is arranged on two flowmeters in flow divider outlet line
The mould exported after the flow on two pipelines, and the PID that the flow feedback measured to PLC18 is carried, PID arithmetic is measured respectively
Analog quantity signal is converted into voltage signal through PLC18, and exports to flow divider, adjusts the oil-out flow of flow divider two；It is arranged on cunning
The grating scale of block both sides measures the position of sliding block respectively, and signal fed back into PLC18, PLC18 by after obtained signal transacting,
The oil-out flow that two regulating valves are adjusted to two regulating valves is exported, is finely adjusted, so as to ensure two hydraulic cylinder synchronous fortune
It is dynamic.
When the electromagnet YA2 of two the first solenoid directional control valves 9 and the electromagnet YA4 of the second solenoid directional control valve 10 are powered,
Two valves locate right position, and hydraulic oil passes through quantitative hydraulic pump and flow divider, then respectively through electromagnetic speed-adjusting valve, flowmeter, reversal valve
Into the rodless cavity of first hydraulic cylinder 13 and second hydraulic cylinder 14, the piston rod of two hydraulic cylinders is moved downward, and band movable slider is downward
Motion, sliding block is in process；When the electromagnet YA1 of the first solenoid directional control valve 9 and the electromagnet YA3 of the second solenoid directional control valve 10 lead to
When electric, valve locates left position, and hydraulic oil passes through quantitative hydraulic pump and flow divider, then enters respectively through regulating valve, flowmeter, reversal valve
Enter the rod chamber of first hydraulic cylinder 13 and second hydraulic cylinder 14, the piston rod of two hydraulic cylinders is moved upwards, band movable slider is transported upwards
Dynamic, sliding block is in backhaul.
When the bypass flow of 6 two oil-outs of flow divider is equal, the centralizing spring of flow divider 6 is according to its pressure by control valve
Core is maintained at middle position, now, and two hydraulic cylinders can keep being synchronized with the movement, when 6 two oil-outs of flow divider bypass flow not
When equal, two flowmeters being arranged in the outlet line of flow divider 6 measure the flow on two pipelines respectively, and will measure
Flow feedback is to the PLC18 PID carried analog module, and the analog signalses exported after PID arithmetic are converted into electricity through PLC18
Signal is pressed, and is exported to flow divider 6,6 liang of oil-out flows of flow divider are adjusted；The grating scale for being arranged on the both sides of sliding block 17 is surveyed respectively
The position of sliding block 17 is measured, and signal is fed back into PLC18, PLC18 after obtained signal transacting, will be exported to two regulating valves,
The oil-out flow of two regulating valves is adjusted, so as to ensure two hydraulic cylinder synchronous motions.
Above-mentioned synchronous control system realizes PID control except the closed loop control module using programmable controller (PLC)
In addition, the adjust automatically of PID controller parameter can also be realized by intellectuality adjustment or self-correcting, adaptive algorithm, from
And realize the flow control of regulating valve.
The present invention uses said system, and flow divider controls two hydraulic cylinder synchronous motions, and its simple in construction, cost is low, system
Make easy, highly reliable.The pilot operated compound relief valve of use has level pressure overflow and the effect of overload protection.M shape solenoid directional control valves
In middle position, operating mechanism can be with remains stationary, it is ensured that the stability of a system.Said system can realize that sliding block two ends can be synchronous
Move up and down, meet the requirement of its balance.In addition, there is the present invention reasonable in design, assembling to adjust simple, offset load resistance
By force, the features such as control accuracy height, raising product quality.
The present invention can also have other embodiment, all to use the equal technical scheme replaced with equivalent transformation formation,
Fall within the scope of protection of present invention.
Claims (5)
1. a kind of hydraulic bending press sliding block balances electro-hydraulic servo synchronous control system, it is characterised in that：Including hydraulic control system
And electric control system；
The hydraulic control system includes fuel tank (1), filter (2), quantitative hydraulic pump (3), motor (4), pilot operated compound relief valve
(5), flow divider (6), the first electromagnetic speed-adjusting valve (7), the second electromagnetic speed-adjusting valve (8), first flowmeter (9), second flowmeter
(10), the first solenoid directional control valve (11), the second solenoid directional control valve (12), first hydraulic cylinder (13), second hydraulic cylinder (14)；
The fuel tank (1) connects the filter (2), and the filter (2) connects the quantitative hydraulic pump (3), described quantitative
Hydraulic pump (3) shaft end connects the motor (4), and the inlet tube of quantitative hydraulic pump (3) the pumping hole connection flow divider (6) is described
Two flowlines of flow divider (6) connect the first electromagnetic speed-adjusting valve (7) and the second electromagnetic speed-adjusting valve (8), first electricity respectively
Magnetic flow speed control valve (7) connection first flowmeter (9), the second electromagnetic speed-adjusting valve (8) connection second flowmeter (10), described first
Branch road where flowmeter (9) connects the first solenoid directional control valve (11), the electricity of branch road connection second where the second flowmeter (10)
Magnetic reversal valve (12), the first solenoid directional control valve (11) connection second hydraulic cylinder (14), second solenoid directional control valve (12)
Connect first hydraulic cylinder (13)；
The electric control system includes being arranged on the first grating scale displacement transducer (15) on the inside of the shoulder of sliding block (17) top two
PLC (18), power supply (19) with second grating scale displacement transducer (16), with PID regulatory functions；
The power supply (19) is connected with PLC (18), the counter module input that the PLC (18) carries respectively with the first grating
Rule displacement sensor (15) and second grating scale displacement transducer (16) connection, grating rule displacement sensor output digit signals,
PLC (18) counter module receives the signal；The analog module input that the PLC (18) carries respectively with first flow
(9) and second flowmeter (10) connection are counted, flowmeter output current signal, current signal enters PLC (18) analog module；
Pass through the flow and pressure of closed loop electrohydraulic control system control slide block (17) both sides hydraulic cylinder (13,14), it is ensured that sliding block is high
Positioning precision, both sides be synchronized with the movement and bender is in unbalance loading operating mode sliding block two ends stress balance；
The flow divider (6) controls two hydraulic cylinder synchronous motions, is arranged on two flows score in flow divider outlet line
The mould exported after flow that Ce Liang be on two pipelines, and the PID that the flow feedback measured to PLC (18) is carried, PID arithmetic
Analog quantity signal is converted into voltage signal through PLC (18), and exports to flow divider, adjusts the oil-out flow of flow divider two；It is arranged on
The grating scale of sliding block both sides measures the position of sliding block respectively, and signal fed back into PLC (18), and PLC (18) is by obtained signal
After processing, the oil-out flow that two regulating valves are adjusted to two regulating valves is exported, is finely adjusted, so as to ensure two hydraulic pressure
Cylinder is synchronized with the movement；
When the electromagnet YA2 of the first solenoid directional control valve (11) and the electromagnet YA4 of the second solenoid directional control valve (12) are powered, two valves
Locate right position, hydraulic oil passes through quantitative hydraulic pump and flow divider, then enters respectively through electromagnetic speed-adjusting valve, flowmeter, reversal valve
The rodless cavity of first hydraulic cylinder (13) and second hydraulic cylinder (14), the piston rod of two hydraulic cylinders is moved downward, and band movable slider is downward
Motion, sliding block is in process；As the electromagnet YA1 and the electromagnet of the second solenoid directional control valve (12) of the first solenoid directional control valve (11)
When YA3 is powered, valve locates left position, and hydraulic oil passes through quantitative hydraulic pump and flow divider, then respectively through regulating valve, flowmeter, change
Enter the rod chamber of first hydraulic cylinder (13) and second hydraulic cylinder (14) to valve, the piston rod of two hydraulic cylinders is moved upwards, drive
Sliding block is moved upwards, and sliding block is in backhaul；
When the bypass flow of (6) two oil-outs of flow divider is equal, the centralizing spring of flow divider (6) is according to its pressure by control valve
Core is maintained at middle position, now, and two hydraulic cylinders can keep being synchronized with the movement, when the bypass flow of (6) two oil-outs of flow divider
When unequal, two flowmeters being arranged in flow divider (6) outlet line measure the flow on two pipelines respectively, and will survey
Flow feedback to PLC (18) PID carried analog module, the analog signalses exported after PID arithmetic are through PLC (18)
Voltage signal is converted into, and exports and gives flow divider (6), the oil-out flow of flow divider (6) two is adjusted；It is arranged on sliding block (17) both sides
Grating scale measure the positions of sliding block (17) respectively, and signal is fed back into PLC (18), PLC (18) is by obtained signal transacting
Afterwards, export to the first solenoid directional control valve (11), the second solenoid directional control valve (12), the first solenoid directional control valve of adjustment (11), the second electricity
The oil-out flow of magnetic reversal valve (12)；
First solenoid directional control valve (11), the second solenoid directional control valve (12) select M shapes, in middle position, the electromagnetic switch
The actuator port of valve is closed, and oil inlet, oil return opening are joined directly together.
2. hydraulic bending press sliding block according to claim 1 balances electro-hydraulic servo synchronous control system, it is characterised in that：Institute
State and pilot operated compound relief valve (5) is housed between quantitative hydraulic pump (3) and the flow divider (6), the pilot operated compound relief valve (5) includes
Main valve and pilot valve two parts.
3. hydraulic bending press sliding block according to claim 1 balances electro-hydraulic servo synchronous control system, it is characterised in that：Institute
Stating the composition of flow divider (6) mainly includes the centralizing spring on valve body, control valve element and control valve element；Flow divider (6) valve
An oil inlet and two oil-outs are provided with body, the axis of control valve element is overlapped with the axis of centralizing spring, installed in valve body
The bypass flow of inside, centralizing spring and two oil-out flowings is maintained at middle position according to its Stress control valve element.
4. hydraulic bending press sliding block according to claim 1 balances electro-hydraulic servo synchronous control system, it is characterised in that：Institute
First flowmeter (9), second flowmeter (10) is stated to be separately mounted on two branch road oil pipes；The first hydraulic cylinder (13), second
Hydraulic cylinder (14) is separately mounted to the outside of the shoulder of sliding block (17) top two, and the sliding block (17) is arranged on above workbench.
5. hydraulic bending press sliding block according to claim 1 balances electro-hydraulic servo synchronous control system, it is characterised in that：Institute
Stating hydraulic cylinder includes cylinder body, piston rod, and cylinder body side upper and lower side is respectively provided with a through hole, the through hole and solenoid directional control valve
It is connected；The piston rod bottom surface corresponding with two shoulders of sliding block (17) top 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 CN104405733A (en) | 2015-03-11 |
| CN104405733B true CN104405733B (en) | 2017-10-20 |
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| 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 |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3760688A (en) * | 1971-11-09 | 1973-09-25 | Bucyrus Erie Co | Synchronized control system for telescoping booms |
| CN101284286A (en) * | 2008-05-16 | 2008-10-15 | 江苏江海机床集团有限公司 | Benders for offset load processing |
| CN202251172U (en) * | 2011-09-23 | 2012-05-30 | 中联重科股份有限公司 | Synchronous hydraulic cylinder control system and crane |
| CN203348225U (en) * | 2013-06-05 | 2013-12-18 | 杭州电子科技大学 | Electro-hydraulic servo synchronous driving controller based on PLC |
| CN203701186U (en) * | 2013-12-02 | 2014-07-09 | 徐工集团工程机械股份有限公司道路机械分公司 | Automatic reset control device for walking leg of walking excavator |
-
2014
- 2014-09-19 CN CN201410481964.2A patent/CN104405733B/en active Active
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