CN108561346A - The precision pressure control system and hydraulic pressure processing method of servo-pump control hydraulic press - Google Patents

The precision pressure control system and hydraulic pressure processing method of servo-pump control hydraulic press Download PDF

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Publication number
CN108561346A
CN108561346A CN201810453721.6A CN201810453721A CN108561346A CN 108561346 A CN108561346 A CN 108561346A CN 201810453721 A CN201810453721 A CN 201810453721A CN 108561346 A CN108561346 A CN 108561346A
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China
Prior art keywords
valve
solenoid directional
directional control
servo
control valve
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CN201810453721.6A
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Chinese (zh)
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CN108561346B (en
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不公告发明人
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Jiangsu Yangli Hydraulic Equipment Co ltd
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Jiangsu Guoli Forging Machine Tool Co Ltd
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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
    • F15B11/02—Systems essentially incorporating special features for controlling the speed or actuating force of an output member
    • F15B11/028—Systems essentially incorporating special features for controlling the speed or actuating force of an output member for controlling the actuating force
    • 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
    • F15B1/00—Installations or systems with accumulators; Supply reservoir or sump assemblies
    • F15B1/02—Installations or systems with accumulators
    • 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
    • F15B11/08—Servomotor systems without provision for follow-up action; Circuits therefor with only one servomotor
    • 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
    • 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
    • F15B2211/20—Fluid pressure source, e.g. accumulator or variable axial piston pump
    • F15B2211/205—Systems with pumps
    • F15B2211/20576—Systems with pumps with multiple pumps
    • F15B2211/20584—Combinations of pumps with high and low capacity

Abstract

The present invention relates to a kind of precision pressure control system of servo-pump control hydraulic press and hydraulic pressure processing methods, hydraulic press includes the middle flow driven by servo motor and big flow servopump, the export pipeline of two pumps is connected by dynamic valve seven with master cylinder epicoele oil circuit, and master cylinder epicoele oil circuit is also connected by dynamic valve four and proportioning valve with fuel tank；Master cylinder cavity of resorption pipeline is connected with the outlet of inserted valve nine, and the entrance of inserted valve nine is connected by inserted valve five and inserted valve eight with fuel tank respectively, and inserted valve five provides support force when slowing down pressurization by overflow valve, and inserted valve eight is opened when backhaul.It includes following action that hydraulic pressure, which processes each working cycles successively,：Accumulator automatic compensation, accumulator stop ftercompction, sliding block fast downlink, sliding block deceleration pressurization, sliding block pressurize, sliding block release, sliding block backhaul and shutdown.Servo-driver uses the switching of flow control and PID adjusting control both of which, and that realizes sliding block stablizes pressurization, avoids pressurization overshoot that part is made to be deformed, and release is steady.

Description

The precision pressure control system and hydraulic pressure processing method of servo-pump control hydraulic press
Technical field
The present invention relates to a kind of hydraulic press, more particularly to a kind of precision pressure control system of servo-pump control hydraulic press, this Invention further relates to a kind of hydraulic pressure processing method of hydraulic press, belongs to machine tool control system technical field.
Background technology
Have in hydraulic press normal process pattern and determine two kinds of control modes of journey and level pressure, it is with sliding block stop position to determine journey state Come what is controlled, depending on pressure condition be then that the pressure value that generates is controlled after driving upper mold to be closed completely with lower die with sliding block System, but sliding block descends operation to switch to work into operation soon in level pressure state is controlled by position signal, so in level pressure pattern In be initially to be controlled using position feedback, reconvert is controlled at pressure after executing agency is with load contact, needs controller With from position pid algorithm to the mathematical operational ability of power pid control algorithm smooth transition.
Realize that the mode that pressure accurately controls is usually threephase asynchronous driving variable displacement with constant power pump at present in the market Pressure control is realized by overflow valve or pressure regulator again, also has part of the manufacturer to replace manual pressure regulating valve using proportional pressure control valve Realize control, by the quick response of proportioning valve realize the control of pressure or even the high response of some equipment utilization servo valves and Done with high accuracy pressure accurately controls.Manual or proportional overflow is equipped with using threephase asynchronous driving variable displacement with constant power pump Valve is also easy to produce after pressure overshoot stabilization again, and just will produce the deformation that can not be restored for some parts, forms substandard products.
It also has in the market in recent years and gear pump is driven using servo motor, high using servo responds and control flexibility To realize accurately controlling for pressure.Generally using inserting valve arrangement in hydraulic system applications, packing state generally uses overflow Mode, this is also the main reason for causing oil temperature to increase.Insert the response of valve system（It such as commutates, be open）In the presence of not in time, It is also easy to produce overvoltage and pressure oscillation；Control signal is easily disturbed using analog quantity, especially far distance controlled or the control of more pump interflow It makes particularly evident.When being controlled using servopump, existing pump intake pressure sensor has master cylinder upper cavity pressure sensor, sensor to adopt again It is not only easily disturbed with voltage signal and is also inconvenient for investigation failure.Under high frequency time operation, impact sound is larger when release, Yi Zao It is loosened at fixing piece.
Invention content
The primary purpose of the present invention is that overcoming problems of the prior art, a kind of servo-pump control hydraulic press is provided Precision pressure control system, it can be achieved that sliding block stablizes pressurization, avoid overshooting, the precision of pressure control is high.
In order to solve the above technical problems, the precision pressure control system of a kind of servo-pump control hydraulic press of the invention, including The cavity of resorption of master cylinder 1 above sliding block, master cylinder 1 is connected with master cylinder cavity of resorption oil circuit G1, epicoele and the master cylinder epicoele oil of master cylinder 1 Road G2 is connected, and further includes pumping B1 and big flow servopump B2, middle flow by the middle flow servo that one M1 of servo motor drives jointly The outlet of servopump B1 is connected with the entrance of one CZ1 of inserted valve, the outlet of big flow servopump B2 and entering for two CZ2 of inserted valve Mouth is connected, and the hydraulic control mouth of two CZ2 of one CZ1 of inserted valve and inserted valve is connected with respective outlet respectively, one CZ1 of inserted valve and inserting The outlet of two CZ2 of valve is connected with main pump outlet pipeline G3, and main pump outlet pipeline G3 is connected with the entrance of seven C7 of dynamic valve, dynamic The outlet of seven C7 of valve is connected with master cylinder epicoele oil circuit G2, and the hydraulic control mouth A of seven C7 of dynamic valve passes through throttle valve and solenoid directional control valve seven The A mouths of YV7 are connected, and the hydraulic control mouth B of seven C7 of dynamic valve is connected by throttle valve with the B mouths of seven YV7 of solenoid directional control valve, electromagnetic switch The P mouths of seven YV7 of valve are connected with control fluid pipe G4, and the T mouths of seven YV7 of solenoid directional control valve are connected with lower fuel tank, solenoid directional control valve seven YV7 is two four-way electromagnetic reversing valves of Y types.
Compared with the existing technology, the present invention achieves following advantageous effect：When sliding block fast downlink, one M1 of servo motor drives The pressure oil that dynamic big flow servopump B2 is pumped out enters main pump outlet pipeline G3, middle flow servo pump B1 pumps through two CZ2 of inserted valve The pressure oil gone out enters main pump outlet pipeline G3 through one CZ1 of inserted valve；When sliding block deceleration pressurization or pressurize, only middle flow servo pump The pressure oil that B1 is pumped out enters main pump outlet pipeline G3 through one CZ1 of inserted valve；When seven YV7 of solenoid directional control valve obtains electric, P mouthfuls with A mouthfuls straight-through, and B mouthfuls straight-through with T mouthfuls, and seven C7 of dynamic valve is opened rapidly, and the pressure oil in main pump outlet pipeline G3 enters master cylinder epicoele In oil circuit G2.Invention removes the check valves in master cylinder oil supply gallery in conventional hydraulic, are directly led by servopump The pressure of cylinder epicoele controls, and eliminates the pressure difference between main pump outlet pipeline G3 and master cylinder epicoele oil circuit G2.Using unlatching and close Close the time quickly and can guarantee that spool reliably returns the dynamic valve of seat, coordinate the high flexibility of servopump can realize it is unidirectionally controlled and When respond, avoid pressure oscillation.
As an improvement of the present invention, further include that B3, small flow servo are pumped by the small flow servo of servo motor two M2 drivings The outlet of pump B3 is connected with the entrance of three CZ3 of inserted valve, the hydraulic control mouth of three CZ3 of inserted valve and the A mouth phases of three YV3 of solenoid directional control valve Even, the P mouths of three YV3 of solenoid directional control valve are connected with auxiliary feed-oil pipe G5, and the T mouths of three YV3 of solenoid directional control valve are connected with lower fuel tank, electricity Three YV3 of magnetic reversal valve is two four-way electromagnetic reversing valves of D types, and the outlet of three CZ3 of inserted valve is connected with auxiliary feed-oil pipe G5, is assisted The outlet of fuel feed pump G5 is connected by one V1 of ball valve with control fluid pipe G4；It is connected with accumulator AC and storage on auxiliary feed-oil pipe G5 It can device pressure sensor PN2.Before work, it is filled with the nitrogen of 6MPa into accumulator AC, and opens one V1 of ball valve；Sliding block acts Before, start servo motor two M2, small flow servo pump B3 and pump out pressure oil, three YV3 of solenoid directional control valve is obtained electric at this time, A mouthfuls and T Mouth communicates, and P mouthfuls communicate with B mouthfuls, and three CZ3 of inserted valve is opened, and auxiliary feed-oil pipe G5 builds pressure and carries out ftercompction to accumulator AC, when When the supercharging pressure that energy storage pressure sensor PN2 detects accumulator AC reaches 16Mpa, three YV3 dead electricity of solenoid directional control valve makes Three CZ3 of inserted valve is closed, while small flow servo pump B3 stops to accumulator AC ftercompctions, by auxiliary feed-oil pipe G5 and accumulator AC Pressure oil is provided to control fluid pipe G4.Since the fuel consumption of control fluid is smaller, the present invention is pumped using small flow servo Then B3 provides control fluid, it is possible to reduce pump greatly using the energy-storage function of accumulator AC to accumulator AC ftercompctions for system Start, it is energy saving.
As further improvement of the invention, the outlet of middle flow servo pump B1 is equipped with pump intake pressure sensor PN1, and It is connected with the entrance of one C1 of dynamic valve, the outlet of one C1 of dynamic valve is connected with lower fuel tank, and the hydraulic control mouth A of one C1 of dynamic valve passes through section Stream valve is connected with the A mouths of one YV1 of solenoid directional control valve, and the hydraulic control mouth B of one C1 of dynamic valve passes through throttle valve and one YV1 of solenoid directional control valve B mouths be connected, P mouths of one YV1 of solenoid directional control valve is connected with fluid pipe G4 is controlled, the T mouths of one YV1 of solenoid directional control valve and lower fuel tank It is connected；The export pipeline of big flow servopump B2 is connected with the entrance of two C2 of dynamic valve, the outlet of two C2 of dynamic valve and lower fuel tank It is connected, the hydraulic control mouth A of two C2 of dynamic valve is connected by throttle valve with the A mouths of two YV2 of solenoid directional control valve, the hydraulic control of two C2 of dynamic valve Mouth B is connected by throttle valve with the B mouths of two YV2 of solenoid directional control valve, the P mouths and control fluid pipe G4 phases of two YV2 of solenoid directional control valve Even, the T mouths of two YV2 of solenoid directional control valve are connected with lower fuel tank；One YV1 of solenoid directional control valve and two YV2 of solenoid directional control valve is two, D types Four-way electromagnetic reversing valve.When sliding block fast downlink or backhaul, one YV1 of solenoid directional control valve obtains electric, and P mouthfuls communicate with B mouthfuls, A mouthfuls and T Mouth communicates, and one C1 of dynamic valve is closed rapidly；Two YV2 of solenoid directional control valve obtains electric simultaneously, and P mouthfuls communicate with B mouthfuls, A mouthfuls with T mouthfuls of phases Logical, two C2 of dynamic valve is closed rapidly, and middle flow servo pump B1 and big flow servopump B2 is worked at the same time, and makes main pump outlet pipeline G3 Build pressure rapidly.When sliding block slows down pressurization or pressurize, two YV2 dead electricity of solenoid directional control valve makes two C2 of dynamic valve open rapidly, big to flow Amount servopump B2 is stopped, and one YV1 of solenoid directional control valve is maintained to obtain electricity condition, is individually gone out from middle flow servo pump B1 to main pump Mouth pipeline G3 fuel feeding.When sliding block release, one YV1 of solenoid directional control valve and two YV2 of solenoid directional control valve dead electricity simultaneously, middle flow servo Pump B1 and big flow servopump B2 does not work.Pump intake pressure sensor PN1 flow servos into control system Real-time Feedback pump The pressure of the outlets B1, in conjunction with the height response of one M1 of servo motor, the flow output of flow servo pump B1, works as main pump outlet in adjustment When pipeline G3 does not build pressure, oil pressure is established with flow control, PID adjusting controls are then used after main pump outlet pipeline G3 has built pressure The oil pressure of main pump outlet pipeline G3 avoids overshooting and ensureing the precision that pressure controls, it can be achieved that stablizing pressurization, avoids that part is made to produce The deformation that life can not restore.
As further improvement of the invention, the export pipeline of middle flow servo pump B1 passes through one F1 of pressure regulator valve and lower fuel tank It is connected, the export pipeline of big flow servopump B2 is connected by two F2 of pressure regulator valve with lower fuel tank, and auxiliary feed-oil pipe G5 also leads to respectively It crosses three F3 of pressure regulator valve and two V2 of ball valve is connected with lower fuel tank.When the outlet pressure of flow servo pump B1 reaches 25MPa in the middle, pressure regulation One F1 of valve opens release, and B1 is pumped with flow servo in protection.When the outlet pressure of big flow servopump B2 reaches 10MPa, adjust Two F2 of pressure valve opens release, to protect big flow servopump B2.When the pressure of auxiliary feed-oil pipe G5 reaches 16MPa, pressure regulator valve Three F3 open release, to protect the safety of system.
As further improvement of the invention, the outlet of main pump outlet pipeline G3 is connected with the entrance of eight CZ8 of inserted valve, inserts The outlet of eight CZ8 of dress valve is connected with the entrance of nine CZ9 of inserted valve, and the outlet of nine CZ9 of inserted valve is connected with master cylinder cavity of resorption oil circuit G1； The hydraulic control mouth of eight CZ8 of inserted valve is connected with the centre exit of shuttle valve S1, the outlet phase of the right entry and eight CZ8 of inserted valve of shuttle valve S1 Even, the left entry of shuttle valve S1 is connected with the A mouths of eight YV8 of solenoid directional control valve, P mouths and eight CZ8 of inserted valve of eight YV8 of solenoid directional control valve Entrance be connected, T mouths of eight YV8 of solenoid directional control valve is connected with lower fuel tank, eight YV8 of solenoid directional control valve be two four-way electromagnetics of D types Reversal valve；The hydraulic control mouth of nine CZ9 of inserted valve is connected with the A mouths of nine YV9 of solenoid directional control valve, the P mouths of nine YV9 of solenoid directional control valve with insert The outlet for filling nine CZ9 of valve is connected, and the T mouths of nine YV9 of solenoid directional control valve are connected with lower fuel tank, and nine YV9 of solenoid directional control valve is two three Electric change valve；Master cylinder cavity of resorption oil circuit G1 is also connected by four F4 of pressure regulator valve with lower fuel tank.Sliding block fast downlink, pressurization of slowing down Or when pressurize, nine YV9 of solenoid directional control valve obtains electric, A mouthfuls and T mouthfuls conductings, inserted valve nine CZ9 openings, master cylinder cavity of resorption oil circuit G1 oil extractions Or branch bulging is kept, eight YV8 of solenoid directional control valve is in power failure state at this time, and P mouthfuls are straight-through with A mouthfuls, and B mouthfuls are straight-through with T mouthfuls, shuttle valve S1 Ensure that the hydraulic control mouth of eight CZ8 of inserted valve builds pressure, eight CZ8 of inserted valve is in reliable closed state.When sliding block release, electromagnetic switch Nine YV9 dead electricity of valve, nine CZ9 of inserted valve are closed.When sliding block backhaul, eight YV8 of solenoid directional control valve obtains electric, A mouthfuls and T mouthfuls conductings, slotting The hydraulic control mouth pressure for filling eight CZ8 of valve is less than inlet pressure, and eight CZ8 of inserted valve is made to open, while nine YV9 of solenoid directional control valve is obtained simultaneously Electricity makes nine CZ9 of inserted valve open, and the pressure oil in main pump outlet pipeline G3 enters master cylinder cavity of resorption oil circuit G1, passes through the work of master cylinder 1 Plug is retracted with movable slider uplink.
As further improvement of the invention, the entrance of nine CZ9 of inserted valve is connected with the entrance of five CZ5 of inserted valve, inserts The outlet of five CZ5 of valve is connected with lower fuel tank, and the hydraulic control mouth of five CZ5 of inserted valve is connected with the A mouths of solenoid directional control valve five YV5, YV6, The B mouths of solenoid directional control valve five and T mouthfuls are connected with lower fuel tank respectively, and the P mouths of solenoid directional control valve five pass through five F5 of pressure regulator valve and lower oil Case is connected, and the A mouths of solenoid directional control valve five are connected by six F6 of pressure regulator valve with lower fuel tank, and solenoid directional control valve five is that Median Function is O The three-position four-way electromagnetic directional valve of type.When sliding block fast downlink, the left coil YV6 of solenoid directional control valve five, which is obtained, electric is in left work The hydraulic control mouth of position, five CZ5 of inserted valve leads to fuel tank, so that five CZ5 of inserted valve is opened, makes master cylinder cavity of resorption oil circuit G1 and the direct phase of fuel tank It is logical, realize the cavity of resorption of master cylinder 1 without support force.When sliding block slows down pressurization or when pressurize, the right coil YV5 of solenoid directional control valve five obtains electric In right working position, the hydraulic control mouth of five CZ5 of inserted valve is controlled by five F5 of pressure regulator valve, by five F5 of pressure regulator valve by the back pressure of 1 cavity of resorption of master cylinder Control is in 5MPa~8MPa.When sliding block release or backhaul, five dead electricity of solenoid directional control valve is in middle position, the liquid of five CZ5 of inserted valve Control mouth is controlled by six F6 of pressure regulator valve, and when reaching pressure upper limit 25MPa, six F6 of pressure regulator valve is opened.
As further improvement of the invention, master cylinder epicoele oil circuit G2 is connected with the entrance of four C4 of dynamic valve, dynamic valve four The outlet of C4 is connected with top tank, and the hydraulic control mouth A of four C4 of dynamic valve is connected by throttle valve with the A mouths of four YV4 of solenoid directional control valve, The hydraulic control mouth B of four C4 of dynamic valve is connected by throttle valve with the B mouths of four YV4 of solenoid directional control valve, the P mouths of four YV4 of solenoid directional control valve It is connected with control fluid pipe G4, the T mouths of four YV4 of solenoid directional control valve are connected with top tank, and four YV4 of solenoid directional control valve is two, D types Four-way electromagnetic reversing valve；Master cylinder epicoele oil circuit G2 is also connected with the entrance of proportioning valve YAA, outlet and the fuel tank phase of proportioning valve YAA Even.When sliding block fast downlink or backhaul, proportioning valve YAA dead electricity is closed, four YV4 dead electricity of solenoid directional control valve, and P mouthfuls are straight-through with A mouthfuls, B mouthfuls straight-through with T mouthfuls, so that four C4 of dynamic valve is opened rapidly, the epicoele of master cylinder 1 is communicated with top tank；When under sliding block is fast, top tank can With rapidly to master cylinder epicoele repairing；When sliding block backhaul, the fluid of master cylinder epicoele can be quickly returning to top tank.Add when sliding block slows down Pressure or when pressurize, proportioning valve YAA dead electricity is closed, four YV4 of solenoid directional control valve obtain it is electric so that four C4 of dynamic valve is closed rapidly, master cylinder 1 Upper cavity pressure is directly controlled by middle flow servo pump B1.At the end of sliding block pressurize, proportioning valve YAA first it is electric progress be discharged to one in advance Constant-pressure, then four YV4 dead electricity of solenoid directional control valve so that four C4 of dynamic valve is opened rapidly, the epicoele of master cylinder 1 is straight-through real with top tank Existing sliding block release can not only realize fast pressure relief by electric signal control proportioning valve YAA in this process but also controllable opening is linear It opens, accomplishes smooth transition of the sliding block pressurize to release without impact to realize.
As further improvement of the invention, one M1 of servo motor is controlled by servo-driver SDR, and three-phase alternating-current supply is logical It crosses circuit breaker Q F1 and filter EM1 is connect with the power end of servo-driver SDR, be mounted on the volume of one tail portions M1 of servo motor Code device PG be connected on the ports CN1 of servo-driver SDR, pump intake pressure sensor PN1 be current feedback pressure sensor and It is connected on the ports CN2 of servo-driver SDR, the A01 feet of the ports CN3 of servo-driver SDR and PLC controller The ports AIO+ of SM231 modules are connected, the AGND feet of the ports CN3 of servo-driver SDR and the SM231 modules of PLC controller The ports AIO- be connected；The CAN communication interface of servo-driver SDR is connected with the CANopen modules of PLC controller；Servo makes Energy button SB1 is connected between the ports enabling signal input terminal S-ON and V1+ of servo-driver SDR, alarm reset button SB2 It is connected between the ports reset signal input terminal ALM-RST and V1+ of servo-driver SDR；The coil of one KA1 of relay connects Between the alarm signal end ALM and the ports V1- of servo-driver SDR, the normally open contact of one KA1 of relay is connected on PLC controls Between 0.0 port and the ports V1+ of the SM223 modules of device processed；The coil of two KA2 of relay is connected to servo-driver SDR's Between the ports Dual-pump flow-converging signal input part TGON and V1-, the normally open contact of two KA2 of relay is connected on PLC controller Between 0.1 port and the ports V1+ of SM223 modules；The CPU of PLC controller passes through ethernet communication line and touch screen PM1 phases Even, the ports V1+ connect+24VDC, the ports V1- ground connection；Servo-driver SDR uses ProNet-2BDIB Ai Sidun servo-drivers, PLC controller uses Siemens's 6ES7215-1BG40-0XB0 types.Servo-driver SDR obtains the number that encoder PG is sent Signal accurately controls the operating of one M1 of servo motor；Servo-driver SDR receives the pump that pump intake pressure sensor PN1 is sent After mouth pressure signal, it is converted into the analog signals of 0-10v pressure control and PLC controller is sent to by the ports CN3 SM223 modules, PLC controller carries out logical to the CAN of servo-driver SDR by CANopen modules after pressure signal comparison Communication interface sends out control signal, and servo-driver SDR selections are using flow control either PID adjusting control oil pressure；Change and passes The flow used, the given 0-10V analog signals of pressure control of uniting control for number bus, logical by CAN using CANOpen agreements Communication interface can be communicated in interference is than stronger industrial environment, solve what the remote transmission of analog signal was easily disturbed Problem；It can be achieved to arrange servo controller close to servo motor, shorten motor cable, while in servo operation information and alarm Appearance can be shown by after bus transfer in the picture of touch screen.When sliding block fast downlink, main pump outlet pipeline G3 does not build pressure, The operating of servo-driver SDR one M1 of flow control servo motor, big flow servopump B2 and middle flow servo pump B1 are common Fuel feeding.When sliding block slows down pressurization or pressurize, main pump outlet pipeline G3 has built pressure and has individually been supplied by middle flow servo pump B1 Oil, the pressure of the outlets flow servo pump B1 into servo-driver SDR Real-time Feedbacks pump intake pressure sensor PN1, in conjunction with servo The high response of one M1 of motor, the flow output of flow servo pump B1, servo-driver SDR use PID adjusting control masters in adjustment The oil pressure of pump discharge pipeline G3 avoids overshooting and ensureing the precision that pressure controls, it can be achieved that stablizing pressurization, avoids that part is made to generate The deformation that can not be restored.Pump intake pressure sensor PN1 uses current feedback pressure sensor, can solve electrical noise interference, be convenient for Carry out diagnosis when broken string or power supply access failure.After the enabled button SB1 of servo is pressed, servo-driver SDR starts, when main pump goes out When the pressure of mouth pipeline G3 is less than 10MPa, the coil of two KA2 of relay obtains electric, the normally open contact closure of two KA2 of relay, PLC Controller receives Dual-pump flow-converging signal so that two YV2 of solenoid directional control valve obtains electric, and two C2 of dynamic valve is closed rapidly, and big flow is watched Clothes pump B2 pumps B1 fuel feeding simultaneously with middle flow servo.When servo-driver SDR detects the failures such as overcurrent, relay one The coil of KA1 obtain it is electric, normally open contact be closed, PLC controller receives alarm signal, by ethernet communication line in touch screen PM1 is prompted, and presses alarm reset button SB2, then ann reset.
It is another object of the present invention to overcome problems of the prior art, provide a kind of using hydraulic press liquid Pressure system carry out hydraulic pressure processing method, low energy consumption, it can be achieved that sliding block stablize pressurization, avoid overshooting, and release is without impact.
In order to solve the above technical problems, the method that the present invention carries out hydraulic pressure processing using hydraulic system of hydraulic machine, Mei Gegong It includes following action successively to recycle：(1) accumulator automatic compensation：The nitrogen of 6MPa, sliding block action are first filled with into accumulator AC Before, start two M2 of servo motor and so that three YV3 of solenoid directional control valve is obtained electric, small flow servo pump B3 pumps out pressure oil to accumulator AC Carry out ftercompction；(2) accumulator stops ftercompction：When the supercharging pressure of accumulator AC reaches 16Mpa, three YV3 dead electricity of solenoid directional control valve makes Three CZ3 of inserted valve is closed, while small flow servo pump B3 stops；(3) sliding block fast downlink：Nine YV9 of solenoid directional control valve, which is obtained, electric to be made to insert It fills nine CZ9 of valve to open, solenoid directional control valve five, which switches to left station, makes five CZ5 of inserted valve open, and the fluid of master cylinder cavity of resorption is led directly to back Fuel tank；One YV1 of solenoid directional control valve and two YV2 of solenoid directional control valve obtains electric, big flow servopump B2 and middle flow servo pump B1 simultaneously Common fuel feeding, seven YV7 of solenoid directional control valve obtain it is electric so that seven C7 of dynamic valve is opened rapidly, fluid enters master cylinder epicoele, while electromagnetism changes So that four C4 of dynamic valve is opened rapidly to four YV4 dead electricity of valve, with sliding block it is fast under, the fluid of top tank fills on master cylinder rapidly Chamber；(4) sliding block, which slows down, pressurizes：Two YV2 dead electricity of solenoid directional control valve makes two C2 of dynamic valve open rapidly, and one YV1 of solenoid directional control valve is kept Must be electric, the independent fuel feeding of B1 is pumped by middle flow servo；Four YV4 of solenoid directional control valve obtain it is electric so that four C4 of dynamic valve is closed rapidly, on master cylinder The pressure of chamber is directly controlled by middle flow servo pump B1, and solenoid directional control valve five switches to right working position and controls master cylinder by five F5 of pressure regulator valve The branch bulging of cavity of resorption；(5) sliding block pressurize：Each valve keeps step state (4) and stays for some time, by flow servo pump B1 controls The pressure of pressurize processed；(6) sliding block release：Proportioning valve YAA first it is electric, master cylinder upper cavity pressure is unloaded in advance；Then solenoid directional control valve One YV1, four YV4 of solenoid directional control valve, solenoid directional control valve five, seven YV7 of solenoid directional control valve, the equal dead electricity of nine YV9 of solenoid directional control valve, sliding block It is able to complete release；(7) sliding block backhaul：One YV1 of solenoid directional control valve and two YV2 of solenoid directional control valve obtains electric, big flow servopump simultaneously B2 and middle flow servo pump the common fuel feeding of B1, eight YV8 of solenoid directional control valve obtain it is electric so that eight CZ8 of inserted valve is opened, solenoid directional control valve nine YV9 obtain it is electric so that nine CZ9 of inserted valve is opened, pressure oil enters the cavity of resorption of master cylinder, master cylinder band movable slider uplink；Proportioning valve YAA dead electricity It closes, seven YV7 of solenoid directional control valve keeps dead electricity that seven C7 of dynamic valve is made to remain turned-off, and four YV4 of solenoid directional control valve keeps dead electricity to make Four C4 of state valve is stayed open, and the fluid of master cylinder epicoele can be quickly returning to top tank；(8) shut down：All solenoid directional control valves lose Electricity, servo motor stop.
Compared with the existing technology, the present invention achieves following advantageous effect：B3 is pumped to accumulator AC using small flow servo Filling liquid ftercompction is carried out, control fluid is provided for system, reduces the startup of big servopump, it is energy saving；Big flow servopump B2 is only Fuel feeding is put into sliding block lower or backhaul soon, energy consumption can be further decreased, reduce equipment failure rate.Eliminate conventional hydraulic system Check valve in system in master cylinder oil supply gallery is directly carried out the pressure control of master cylinder epicoele by servopump, eliminates main pump outlet pipe Pressure difference between road G3 and master cylinder epicoele oil circuit G2, makes control accuracy higher；Dwell pressure is by flow servo pump B1 controls, nothing Oil temperature need to be advantageously reduced by overflow；Quickly and it can guarantee that spool reliably returns the dynamic of seat using the time is opened and closed Valve, coordinate the high flexibility of servopump can realize it is unidirectionally controlled timely respond to, avoid pressure oscillation.At the end of pressurize, pass through ratio The example pre- releases of valve YAA are realized without impact release, accomplish smooth transition of the sliding block pressurize to release.Pumping hole uses current feedback pressure Force snesor can solve electrical noise interference, be convenient for diagnosis when broken string or power supply access failure.It is logical using CANOpen agreements Crossing CAN communication interface can be communicated in interference is than stronger industrial environment, and solving analog signal, transmission is easy at a distance The problem of being disturbed；It can be achieved to arrange servo controller close to servo motor, shorten motor cable.
As an improvement of the present invention, when sliding block fast downlink, main pump outlet pipeline G3 does not build pressure, servo-driver SDR With the operating of one M1 of flow control servo motor；When sliding block slows down pressurization or pressurize, main pump outlet pipeline G3 has built pressure simultaneously And the independent fuel feeding of B1, pump intake pressure sensor PN1 flow servos into servo-driver SDR Real-time Feedbacks are pumped by middle flow servo The pressure for pumping the outlets B1, in conjunction with the height response of one M1 of servo motor, the flow output of flow servo pump B1, servo-drive in adjustment Device SDR uses the oil pressure of PID adjusting control main pump outlet pipelines G3, realizes and stablizes pressurization, avoids overshooting；When sliding block release, Can not only fast pressure relief have been realized but also the linear opening of controllable opening by controlling proportioning valve YAA by electric signal, realized without impact, accomplished Sliding block pressurize to release smooth transition.Servo-driver SDR is cut using flow control and PID adjusting control both of which It changes, it can be achieved that sliding block stablizes pressurization, the precision of guarantee pressure control avoids pressurization overshoot that part is made to generate the change that can not be restored Shape.The loosening of prodigious impact sound and fixing piece will not be caused when release.
Description of the drawings
The present invention will be further described in detail below with reference to the accompanying drawings and specific embodiments, attached drawing only provide with reference to Illustrate to use, it is non-limiting the present invention.
Fig. 1 is the hydraulic schematic diagram of the precision pressure control system of servo-pump control hydraulic press of the present invention.
Fig. 2 is the electrical schematic diagram of the precision pressure control system of servo-pump control hydraulic press of the present invention.
In figure：1. master cylinder；B1. middle flow servo pump；B2. big flow servopump；B3. small flow servo pump；M1. servo electricity Machine one；M2. servo motor two；AC. accumulator；PN1. pump intake pressure sensor；PN2. energy storage pressure sensor；G1. master cylinder Cavity of resorption oil circuit；G2. master cylinder epicoele oil circuit；G3. main pump outlet pipeline；G4. control oil pipe；G5. auxiliary feed-oil pipe；YV1. electromagnetism changes To valve one；YV2. solenoid directional control valve two；YV3. solenoid directional control valve three；YV4. solenoid directional control valve four；YV5, YV6. solenoid directional control valve Five；YV7. solenoid directional control valve seven；YV8. solenoid directional control valve eight；YV9. solenoid directional control valve nine；YAA. proportioning valve；C1. dynamic valve one； C2. dynamic valve two；C4. dynamic valve four；C7. dynamic valve seven；CZ1. inserted valve one；CZ2. inserted valve two；CZ3. inserted valve three； CZ5. inserted valve five；CZ8. inserted valve eight；CZ9. inserted valve nine；S1. shuttle valve；F1. pressure regulator valve one；F2. pressure regulator valve two；F3. it adjusts Pressure valve three；F4. pressure regulator valve four；F5. pressure regulator valve five；F6. pressure regulator valve six；V1. ball valve one；V2. ball valve two；SDR. servo-drive Device；QF1. breaker；EM1. filter；PG. encoder；SB1. servo enables button；SB2. alarm reset button；S-ON. it opens Dynamic signal input part；ALM. alarm signal end；ALM-RST. reset signal input terminal；TGON. Dual-pump flow-converging signal input part； PM1. touch screen；R. braking resistor.
Specific implementation mode
As shown in Figure 1, the precision pressure control system of servo-pump control hydraulic press of the present invention, includes above sliding block The cavity of resorption of master cylinder 1, master cylinder 1 is connected with master cylinder cavity of resorption oil circuit G1, and the epicoele of master cylinder 1 is connected with master cylinder epicoele oil circuit G2, further includes The middle flow servo pump B1 and big flow servopump B2 driven jointly by one M1 of servo motor, the outlet of middle flow servo pump B1 with The entrance of one CZ1 of inserted valve is connected, and the outlet of big flow servopump B2 is connected with the entrance of two CZ2 of inserted valve, inserted valve one The hydraulic control mouth of two CZ2 of CZ1 and inserted valve is connected with respective outlet respectively, and the outlet of two CZ2 of one CZ1 of inserted valve and inserted valve is equal Be connected with main pump outlet pipeline G3, main pump outlet pipeline G3 is connected with the entrance of seven C7 of dynamic valve, the outlet of seven C7 of dynamic valve with Master cylinder epicoele oil circuit G2 is connected, and the hydraulic control mouth A of seven C7 of dynamic valve is connected by throttle valve with the A mouths of seven YV7 of solenoid directional control valve, moves The hydraulic control mouth B of seven C7 of state valve is connected by throttle valve with the B mouths of seven YV7 of solenoid directional control valve, the P mouths of seven YV7 of solenoid directional control valve with It controls fluid pipe G4 to be connected, the T mouths of seven YV7 of solenoid directional control valve are connected with lower fuel tank, and seven YV7 of solenoid directional control valve is two four, Y types Electric change valve.
When sliding block fast downlink, the pressure oil that servo motor one M1 drivings big flow servopump B2 is pumped out is through inserted valve two CZ2 enters main pump outlet pipeline G3, and the pressure oil that middle flow servo pump B1 is pumped out enters main pump outlet pipe through one CZ1 of inserted valve Road G3；Sliding block slows down pressurization or when pressurize, only in the pressure oils that pump out of flow servo pump B1 enter main pump through one CZ1 of inserted valve and go out Mouth pipeline G3；When seven YV7 of solenoid directional control valve obtains electric, P mouthfuls straight-through with A mouthfuls, and B mouthfuls straight-through with T mouthfuls, and seven C7 of dynamic valve is beaten rapidly It opens, the pressure oil in main pump outlet pipeline G3 enters in master cylinder epicoele oil circuit G2.Invention removes main in conventional hydraulic Check valve in oil supply cylinder channel, directly carried out by servopump master cylinder epicoele pressure control, eliminate main pump outlet pipeline G3 with Pressure difference between master cylinder epicoele oil circuit G2.Quickly and it can guarantee that spool reliably returns the dynamic of seat using the time is opened and closed Valve, coordinate the high flexibility of servopump can realize it is unidirectionally controlled timely respond to, avoid pressure oscillation.
Hydraulic system further includes pumping B3, the outlet of small flow servo pump B3 by the small flow servo of servo motor two M2 drivings It is connected with the entrance of three CZ3 of inserted valve, the hydraulic control mouth of three CZ3 of inserted valve is connected with the A mouths of three YV3 of solenoid directional control valve, and electromagnetism changes It is connected to the P mouths of three YV3 of valve with auxiliary feed-oil pipe G5, the T mouths of three YV3 of solenoid directional control valve are connected with lower fuel tank, solenoid directional control valve Three YV3 are two four-way electromagnetic reversing valves of D types, and the outlet of three CZ3 of inserted valve is connected with auxiliary feed-oil pipe G5, auxiliary feed-oil pipe G5 Outlet by one V1 of ball valve with control fluid pipe G4 be connected；It is connected with accumulator AC and energy storage pressure on auxiliary feed-oil pipe G5 Sensor PN2.
Before work, it is filled with the nitrogen of 6MPa into accumulator AC, and opens one V1 of ball valve；Before sliding block action, start servo Motor two M2, small flow servo pump B3 pump out pressure oil, and three YV3 of solenoid directional control valve is obtained electric at this time, and A mouthfuls communicate with T mouthfuls, P mouthfuls It is communicated with B mouthfuls, three CZ3 of inserted valve is opened, auxiliary feed-oil pipe G5 builds pressure and carries out ftercompction to accumulator AC, works as energy storage pressure When the supercharging pressure that sensor PN2 detects accumulator AC reaches 16Mpa, three YV3 dead electricity of solenoid directional control valve makes three CZ3 of inserted valve It closes, while small flow servo pump B3 stops to accumulator AC ftercompctions, from auxiliary feed-oil pipe G5 and accumulator AC to control fluid Pipe G4 provides pressure oil.Since the fuel consumption of control fluid is smaller, the present invention pumps B3 to accumulator using small flow servo Then AC ftercompctions provide control fluid using the energy-storage function of accumulator AC for system, it is possible to reduce energy is saved in the startup pumped greatly Source.
The outlet of middle flow servo pump B1 is equipped with pump intake pressure sensor PN1, and is connected with the entrance of one C1 of dynamic valve, The outlet of one C1 of dynamic valve is connected with lower fuel tank, and the hydraulic control mouth A of one C1 of dynamic valve passes through throttle valve and one YV1 of solenoid directional control valve A mouthfuls are connected, and the hydraulic control mouth B of one C1 of dynamic valve is connected by throttle valve with the B mouths of one YV1 of solenoid directional control valve, solenoid directional control valve one The P mouths of YV1 are connected with control fluid pipe G4, and the T mouths of one YV1 of solenoid directional control valve are connected with lower fuel tank.
The export pipeline of big flow servopump B2 is connected with the entrance of two C2 of dynamic valve, the outlet of two C2 of dynamic valve and lower oil Case is connected, and the hydraulic control mouth A of two C2 of dynamic valve is connected by throttle valve with the A mouths of two YV2 of solenoid directional control valve, the liquid of two C2 of dynamic valve Control mouth B is connected by throttle valve with the B mouths of two YV2 of solenoid directional control valve, P mouths and the control fluid pipe G4 of two YV2 of solenoid directional control valve It is connected, the T mouths of two YV2 of solenoid directional control valve are connected with lower fuel tank；One YV1 of solenoid directional control valve and two YV2 of solenoid directional control valve is D types two Position four-way electromagnetic reversing valve.
When sliding block fast downlink or backhaul, one YV1 of solenoid directional control valve obtains electric, and P mouthfuls communicate with B mouthfuls, and A mouthfuls communicate with T mouthfuls, One C1 of dynamic valve is closed rapidly；Two YV2 of solenoid directional control valve is obtained electric simultaneously, and P mouthfuls communicate with B mouthfuls, and A mouthfuls communicate with T mouthfuls, dynamic Two C2 of valve is closed rapidly, and middle flow servo pump B1 and big flow servopump B2 is worked at the same time, and main pump outlet pipeline G3 is made to build rapidly Pressure.
When sliding block slows down pressurization or pressurize, two YV2 dead electricity of solenoid directional control valve makes two C2 of dynamic valve open rapidly, big flow Servopump B2 is stopped, and one YV1 of solenoid directional control valve is maintained to obtain electricity condition, and B1 is pumped individually to main pump outlet from middle flow servo Pipeline G3 fuel feeding.
When sliding block release, dead electricity, middle flow servo pump B1 to one YV1 of solenoid directional control valve and two YV2 of solenoid directional control valve simultaneously It does not work with big flow servopump B2.
The export pipeline of middle flow servo pump B1 is connected by one F1 of pressure regulator valve with lower fuel tank, big flow servopump B2's Export pipeline is connected by two F2 of pressure regulator valve with lower fuel tank, and auxiliary feed-oil pipe G5 also passes through two V2 of three F3 of pressure regulator valve and ball valve respectively It is connected with lower fuel tank.When the outlet pressure of flow servo pump B1 reaches 25MPa in the middle, one F1 of pressure regulator valve opens release, with protection Middle flow servo pumps B1.When the outlet pressure of big flow servopump B2 reaches 10MPa, two F2 of pressure regulator valve opens release, to protect Protect big flow servopump B2.When the pressure of auxiliary feed-oil pipe G5 reaches 16MPa, three F3 of pressure regulator valve opens release, is to protect The safety of system.
The outlet of main pump outlet pipeline G3 is connected with the entrance of eight CZ8 of inserted valve, the outlet of eight CZ8 of inserted valve and inserted valve The entrance of nine CZ9 is connected, and the outlet of nine CZ9 of inserted valve is connected with master cylinder cavity of resorption oil circuit G1；The hydraulic control mouth and shuttle of eight CZ8 of inserted valve The centre exit of valve S1 is connected, and the right entry of shuttle valve S1 is connected with the outlet of eight CZ8 of inserted valve, the left entry and electromagnetism of shuttle valve S1 The A mouths of eight YV8 of reversal valve are connected, and the P mouths of eight YV8 of solenoid directional control valve are connected with the entrance of eight CZ8 of inserted valve, solenoid directional control valve eight The T mouths of YV8 are connected with lower fuel tank, and eight YV8 of solenoid directional control valve is two four-way electromagnetic reversing valves of D types；The hydraulic control of nine CZ9 of inserted valve Mouth is connected with the A mouths of nine YV9 of solenoid directional control valve, and the P mouths of nine YV9 of solenoid directional control valve are connected with the outlet of nine CZ9 of inserted valve, electromagnetism The T mouths of nine YV9 of reversal valve are connected with lower fuel tank, and nine YV9 of solenoid directional control valve is two-bit triplet solenoid directional control valve；Master cylinder cavity of resorption oil circuit G1 is also connected by four F4 of pressure regulator valve with lower fuel tank.
When sliding block fast downlink, deceleration pressurization or pressurize, nine YV9 of solenoid directional control valve obtains electric, A mouthfuls and T mouthfuls conductings, inserted valve Nine CZ9 are opened, and the oil circuit G1 oil extractions of master cylinder cavity of resorption or keep branch bulging, and eight YV8 of solenoid directional control valve is in power failure state at this time, P mouthfuls Straight-through with A mouthfuls, B mouthfuls straight-through with T mouthfuls, and shuttle valve S1 ensures that the hydraulic control mouth of eight CZ8 of inserted valve builds pressure, and eight CZ8 of inserted valve is in reliable Closed state.
When sliding block release, nine YV9 dead electricity of solenoid directional control valve, nine CZ9 of inserted valve is closed.
When sliding block backhaul, eight YV8 of solenoid directional control valve obtains electric, A mouthfuls and T mouthfuls conductings, the hydraulic control mouth pressure of eight CZ8 of inserted valve Less than inlet pressure, eight CZ8 of inserted valve is made to open, while nine YV9 of solenoid directional control valve simultaneously must be electric, nine CZ9 of inserted valve is made to open, Pressure oil in main pump outlet pipeline G3 enters master cylinder cavity of resorption oil circuit G1, is retracted with movable slider uplink by the piston of master cylinder 1.
The entrance of nine CZ9 of inserted valve is connected with the entrance of five CZ5 of inserted valve, the outlet of five CZ5 of inserted valve and lower fuel tank phase Even, the hydraulic control mouth of five CZ5 of inserted valve is connected with the A mouths of solenoid directional control valve five YV5, YV6, and the B mouths of solenoid directional control valve five divide with T mouthfuls It is not connected with lower fuel tank, the P mouths of solenoid directional control valve five are connected by five F5 of pressure regulator valve with lower fuel tank, the A mouths of solenoid directional control valve five It is connected with lower fuel tank by six F6 of pressure regulator valve, solenoid directional control valve five is that Median Function is O-shaped three-position four-way electromagnetic directional valve.
When sliding block fast downlink, the left coil YV6 of solenoid directional control valve five obtain it is electric be in left station, five CZ5's of inserted valve Hydraulic control mouth leads to fuel tank, so that five CZ5 of inserted valve is opened, master cylinder cavity of resorption oil circuit G1 is made directly to be communicated with fuel tank, realizes the cavity of resorption of master cylinder 1 Without support force.
When sliding block slows down pressurization or when pressurize, the right coil YV5 of solenoid directional control valve five, which is obtained, electric is in right working position, inserted valve five The hydraulic control mouth of CZ5 is controlled by five F5 of pressure regulator valve, is controlled the back pressure of 1 cavity of resorption of master cylinder in 5MPa~8MPa by five F5 of pressure regulator valve.
When sliding block release or backhaul, five dead electricity of solenoid directional control valve is in middle position, and the hydraulic control mouth of five CZ5 of inserted valve is controlled by Six F6 of pressure regulator valve, when reaching pressure upper limit 25MPa, six F6 of pressure regulator valve is opened.
Master cylinder epicoele oil circuit G2 is connected with the entrance of four C4 of dynamic valve, and the outlet of four C4 of dynamic valve is connected with top tank, moves The hydraulic control mouth A of four C4 of state valve is connected by throttle valve with the A mouths of four YV4 of solenoid directional control valve, and the hydraulic control mouth B of four C4 of dynamic valve passes through Throttle valve is connected with the B mouths of four YV4 of solenoid directional control valve, and the P mouths of four YV4 of solenoid directional control valve are connected with control fluid pipe G4, electromagnetism The T mouths of four YV4 of reversal valve are connected with top tank, and four YV4 of solenoid directional control valve is two four-way electromagnetic reversing valves of D types；Master cylinder epicoele Oil circuit G2 is also connected with the entrance of proportioning valve YAA, and the outlet of proportioning valve YAA is connected with fuel tank.
When sliding block fast downlink or backhaul, proportioning valve YAA dead electricity is closed, four YV4 dead electricity of solenoid directional control valve, P mouthfuls and A mouthfuls Straight-through, B mouthfuls straight-through with T mouthfuls, so that four C4 of dynamic valve is opened rapidly, the epicoele of master cylinder 1 is communicated with top tank；When under sliding block is fast, on Fuel tank can be rapidly to master cylinder epicoele repairing；When sliding block backhaul, the fluid of master cylinder epicoele can be quickly returning to top tank.
When sliding block slows down pressurization or when pressurize, proportioning valve YAA dead electricity is closed, and four YV4 of solenoid directional control valve, which is obtained, electric makes dynamic valve Four C4 are closed rapidly, and the upper cavity pressure of master cylinder 1 is directly controlled by middle flow servo pump B1.
At the end of sliding block pressurize, proportioning valve YAA first electric progress is discharged to certain pressure in advance, then solenoid directional control valve four YV4 dead electricity makes four C4 of dynamic valve open rapidly, and epicoele and the straight-through realization sliding block release of top tank of master cylinder 1 pass through in this process Electric signal control proportioning valve YAA can not only realize fast pressure relief but also the linear opening of controllable opening, accomplish without impact to realize Sliding block pressurize to release smooth transition.
As shown in Fig. 2, one M1 of servo motor is controlled by servo-driver SDR, three-phase alternating-current supply by circuit breaker Q F1 and Filter EM1 is connect with the power end of servo-driver SDR, and the encoder PG mounted on one tail portions M1 of servo motor, which is connected to, to be watched It takes on the ports CN1 of driver SDR, pump intake pressure sensor PN1 is current feedback pressure sensor and is connected to servo-drive On the ports CN2 of device SDR, braking resistor R is connected on the braking resistor connection terminal of servo-driver SDR, servo-driver The A01 feet of the ports CN3 of SDR are connected with the ports AIO+ of the SM231 modules of PLC controller, the ends CN3 of servo-driver SDR The AGND feet of mouth are connected with the ports AIO- of the SM231 modules of PLC controller；The CAN communication interface of servo-driver SDR with The CANopen modules of PLC controller are connected；Servo enables the enabling signal input terminal that button SB1 is connected to servo-driver SDR Between the ports S-ON and V1+, alarm reset button SB2 be connected to the reset signal input terminal ALM-RST of servo-driver SDR with Between the ports V1+；The coil of one KA1 of relay is connected between the alarm signal end ALM of servo-driver SDR and the ports V1-, The normally open contact of one KA1 of relay is connected between 0.0 port and the ports V1+ of the SM223 modules of PLC controller；Relay The coil of two KA2 is connected between the ports Dual-pump flow-converging signal input part TGON and V1- of servo-driver SDR, relay two The normally open contact of KA2 is connected between 0.1 port and the ports V1+ of the SM223 modules of PLC controller；The CPU of PLC controller It is connected with touch screen PM1 by ethernet communication line, the ports V1+ connect+24VDC, the ports V1- ground connection；Servo-driver SDR is used ProNet-2BDIB Ai Sidun servo-drivers, PLC controller use Siemens's 6ES7215-1BG40-0XB0 types.
Servo-driver SDR obtains the digital signal that encoder PG is sent, and accurately controls the operating of one M1 of servo motor； After servo-driver SDR receives the pump intake pressure signal that pump intake pressure sensor PN1 is sent, it is converted into 0-10v pressure The analog signals of control and the SM223 modules that PLC controller is sent to by the ports CN3, PLC controller carry out pressure signal Control signal, servo-driver SDR choosings are sent out to the CAN communication interface of servo-driver SDR by CANopen modules after comparison It selects using flow control either PID adjusting control oil pressure；Change conventionally employed flow, pressure control gives 0-10V simulations Signal controls for number bus, can be in interference than stronger industrial environment by CAN communication interface using CANOpen agreements In communicated, solve the problems, such as analog signal at a distance transmission be easily disturbed；It can be achieved servo controller close to servo electricity Machine is arranged, shortens motor cable, while servo operation information and alarm content can pass through the picture in touch screen after bus transfer Middle display.
When sliding block fast downlink, main pump outlet pipeline G3 does not build pressure, servo-driver SDR flow control servo motors The operating of one M1, big flow servopump B2 and middle flow servo pump the common fuel feeding of B1.
When sliding block slows down pressurization or when pressurize, main pump outlet pipeline G3 has built pressure and independent by middle flow servo pump B1 Fuel feeding, the pressure of the outlets flow servo pump B1 into servo-driver SDR Real-time Feedbacks pump intake pressure sensor PN1, in conjunction with watching The high response for taking one M1 of motor, the flow output of flow servo pump B1, servo-driver SDR use PID adjusting controls in adjustment The oil pressure of main pump outlet pipeline G3 avoids overshooting and ensureing the precision that pressure controls, it can be achieved that stablizing pressurization, avoids that part is made to produce The deformation that life can not restore.Pump intake pressure sensor PN1 uses current feedback pressure sensor, can solve electrical noise interference, just Diagnosis when carrying out broken string or power supply access failure.
After the enabled button SB1 of servo is pressed, servo-driver SDR starts, when the pressure of main pump outlet pipeline G3 is less than When 10MPa, the coil of two KA2 of relay obtains electric, and the normally open contact of two KA2 of relay is closed, and PLC controller receives double pump conjunction Flow signal so that two YV2 of solenoid directional control valve obtains electric, and two C2 of dynamic valve is closed rapidly, and big flow servopump B2 is watched with middle flow Clothes pump B1 while fuel feeding.
When servo-driver SDR detects the failures such as overcurrent, the coil of one KA1 of relay obtains electric, normally open contact It is closed, PLC controller receives alarm signal, is prompted in touch screen PM1 by ethernet communication line, presses alarm reset button SB2, then ann reset.
The method that the present invention carries out hydraulic pressure processing using hydraulic system of hydraulic machine, each working cycles include following dynamic successively Make：(1) accumulator automatic compensation：It is first filled with the nitrogen of 6MPa into accumulator AC and starts two M2 of servo motor before sliding block action And it is electric so that three YV3 of solenoid directional control valve is obtained, small flow servo pump B3 pumps out pressure oil and carries out ftercompction to accumulator AC；
(2) accumulator stops ftercompction：When the supercharging pressure of accumulator AC reaches 16Mpa, three YV3 dead electricity of solenoid directional control valve makes inserting Three CZ3 of valve is closed, while small flow servo pump B3 stops；
(3) sliding block fast downlink：Nine YV9 of solenoid directional control valve obtain it is electric so that nine CZ9 of inserted valve is opened, solenoid directional control valve five switches to a left side Station makes five CZ5 of inserted valve open, and the fluid of master cylinder cavity of resorption leads directly to oil return box；One YV1 of solenoid directional control valve and solenoid directional control valve two YV2 simultaneously must be electric, and big flow servopump B2 and middle flow servo pump the common fuel feeding of B1, and seven YV7 of solenoid directional control valve obtains electric make dynamically Seven C7 of valve is opened rapidly, and fluid enters master cylinder epicoele, while four YV4 dead electricity of solenoid directional control valve makes four C4 of dynamic valve open rapidly, With sliding block it is fast under, the fluid of top tank fills into rapidly master cylinder epicoele；
(4) sliding block, which slows down, pressurizes：Two YV2 dead electricity of solenoid directional control valve makes two C2 of dynamic valve open rapidly, and one YV1 of solenoid directional control valve is protected It holds electric, the independent fuel feeding of B1 is pumped by middle flow servo；Four YV4 of solenoid directional control valve obtain it is electric so that four C4 of dynamic valve is closed rapidly, master cylinder The pressure of epicoele is directly controlled by middle flow servo pump B1, and solenoid directional control valve five switches to right working position by pressure regulator valve five F5 control masters The branch bulging of cylinder cavity of resorption；
(5) sliding block pressurize：Each valve keeps step state (4) and stays for some time, and pressurize is controlled by flow servo pump B1 Pressure；
(6) sliding block release：Proportioning valve YAA first it is electric, master cylinder upper cavity pressure is unloaded in advance；Then one YV1 of solenoid directional control valve, electricity Four YV4 of magnetic reversal valve, solenoid directional control valve five, seven YV7 of solenoid directional control valve, the equal dead electricity of nine YV9 of solenoid directional control valve, sliding block are able to completely Release；
(7) sliding block backhaul：One YV1 of solenoid directional control valve and two YV2 of solenoid directional control valve obtains electric, big flow servopump B2 and middle stream simultaneously Measure the common fuel feeding of servopump B1, eight YV8 of solenoid directional control valve obtain it is electric so that eight CZ8 of inserted valve is opened, nine YV9 of solenoid directional control valve obtains electric make Nine CZ9 of inserted valve is opened, and pressure oil enters the cavity of resorption of master cylinder, master cylinder band movable slider uplink；Proportioning valve YAA dead electricity is closed, electromagnetism Seven YV7 of reversal valve keeps dead electricity that seven C7 of dynamic valve is made to remain turned-off, and four YV4 of solenoid directional control valve keeps dead electricity that four C4 of dynamic valve is made to protect Opening is held, the fluid of master cylinder epicoele can be quickly returning to top tank；
(8) shut down：All equal dead electricity of solenoid directional control valve, servo motor stop.
B3 is pumped using small flow servo, filling liquid ftercompction is carried out to accumulator AC, provides control fluid for system, reduction is watched greatly The startup of pump is taken, it is energy saving；Big flow servopump B2 only puts into fuel feeding in sliding block lower or backhaul soon, can further decrease Energy consumption reduces equipment failure rate.Eliminate the check valve in master cylinder oil supply gallery in conventional hydraulic, by servopump directly into The pressure of row master cylinder epicoele controls, and eliminates the pressure difference between main pump outlet pipeline G3 and master cylinder epicoele oil circuit G2, keeps control smart Spend higher；Dwell pressure is by flow servo pump B1 controls, without by overflow, advantageously reducing oil temperature；Using opening and closing Time quickly and can guarantee that spool reliably returns the dynamic valve of seat, coordinate the high flexibility of servopump that can realize unidirectionally controlled timely Response, avoids pressure oscillation.At the end of pressurize, by the pre- releases of proportioning valve YAA, realizes without impact release, accomplish sliding block pressurize To the smooth transition of release.
When sliding block fast downlink, main pump outlet pipeline G3 does not build pressure, servo-driver SDR flow control servo motors The operating of one M1；When sliding block slows down pressurization or pressurize, main pump outlet pipeline G3 has built pressure and has pumped B1 by middle flow servo Independent fuel feeding, the pressure of the outlets flow servo pump B1 into servo-driver SDR Real-time Feedbacks pump intake pressure sensor PN1, knot The high response for closing one M1 of servo motor, the flow output of flow servo pump B1, servo-driver SDR are adjusted using PID in adjustment The oil pressure of main pump outlet pipeline G3 is controlled, realizes and stablizes pressurization, avoid overshooting；When sliding block release, ratio is controlled by electric signal Example valve YAA can not only realize fast pressure relief but also the linear opening of controllable opening, realize without impact, accomplish sliding block pressurize to release Smooth transition.Servo-driver SDR using flow control and the switching of PID adjusting control both of which, it can be achieved that sliding block it is steady Fixed pressurization, ensures the precision of pressure control, avoids pressurization overshoot that part is made to generate the deformation that can not be restored.It will not be caused when release The loosening of prodigious impact sound and fixing piece.
The foregoing is merely the preferable possible embodiments of the present invention, non-therefore the limitation present invention patent protection model It encloses.In addition to the implementation, the present invention can also have other embodiment.All skills formed using equivalent substitution or equivalent transformation Art scheme, is all fallen within the protection domain of application claims.Technical characteristic of the present invention without description can be by or using now There is technology realization, details are not described herein.

Claims (10)

1. a kind of precision pressure control system of servo-pump control hydraulic press includes the master cylinder (1) above sliding block, master cylinder (1) cavity of resorption is connected with master cylinder cavity of resorption oil circuit (G1), and the epicoele of master cylinder (1) is connected with master cylinder epicoele oil circuit (G2), and feature exists In：Further include that (B1) and big flow servopump (B2), middle flow are pumped by the middle flow servo that servo motor one (M1) drives jointly The outlet of servopump (B1) is connected with the entrance of inserted valve one (CZ1), outlet and the inserted valve two of big flow servopump (B2) (CZ2) entrance is connected, and the hydraulic control mouth of inserted valve one (CZ1) and inserted valve two (CZ2) is connected with respective outlet respectively, inserts The outlet of valve one (CZ1) and inserted valve two (CZ2) is connected with main pump outlet pipeline (G3), main pump outlet pipeline (G3) and dynamic The entrance of valve seven (C7) is connected, and the outlet of dynamic valve seven (C7) is connected with master cylinder epicoele oil circuit (G2), the liquid of dynamic valve seven (C7) Control mouth A is connected by throttle valve with the A mouths of solenoid directional control valve seven (YV7), the hydraulic control mouth B of dynamic valve seven (C7) by throttle valve and The B mouths of solenoid directional control valve seven (YV7) are connected, and the P mouths of solenoid directional control valve seven (YV7) are connected with control fluid pipe (G4), and electromagnetism changes It is connected to the T mouths of valve seven (YV7) with lower fuel tank, solenoid directional control valve seven (YV7) is two four-way electromagnetic reversing valves of Y types.
2. the precision pressure control system of servo-pump control hydraulic press according to claim 1, it is characterised in that：Further include by The small flow servo pump (B3) of servo motor two (M2) driving, outlet and the inserted valve three (CZ3) of small flow servo pump (B3) Entrance is connected, and the hydraulic control mouth of inserted valve three (CZ3) is connected with the A mouths of solenoid directional control valve three (YV3), solenoid directional control valve three (YV3) P mouths be connected with auxiliary feed-oil pipe (G5), the T mouths of solenoid directional control valve three (YV3) are connected with lower fuel tank, solenoid directional control valve three (YV3) it is two four-way electromagnetic reversing valves of D types, the outlet of inserted valve three (CZ3) is connected with auxiliary feed-oil pipe (G5), auxiliary feed-oil The outlet for managing (G5) is connected by ball valve one (V1) with control fluid pipe (G4)；It is connected with accumulator on auxiliary feed-oil pipe (G5) (AC) and energy storage pressure sensor (PN2).
3. the precision pressure control system of servo-pump control hydraulic press according to claim 2, it is characterised in that：Middle flow is watched The outlet of clothes pump (B1) is equipped with pump intake pressure sensor (PN1), and is connected with the entrance of dynamic valve one (C1), dynamic valve one (C1) outlet is connected with lower fuel tank, the A that the hydraulic control mouth A of dynamic valve one (C1) passes through throttle valve and solenoid directional control valve one (YV1) Mouth is connected, and the hydraulic control mouth B of dynamic valve one (C1) is connected by throttle valve with the B mouths of solenoid directional control valve one (YV1), solenoid directional control valve The P mouths of one (YV1) are connected with control fluid pipe (G4), and the T mouths of solenoid directional control valve one (YV1) are connected with lower fuel tank；Big flow is watched The export pipeline of clothes pump (B2) is connected with the entrance of dynamic valve two (C2), and the outlet of dynamic valve two (C2) is connected with lower fuel tank, moves The hydraulic control mouth A of state valve two (C2) is connected by throttle valve with the A mouths of solenoid directional control valve two (YV2), the hydraulic control of dynamic valve two (C2) Mouth B is connected by throttle valve with the B mouths of solenoid directional control valve two (YV2), P mouths and the control fluid pipe of solenoid directional control valve two (YV2) (G4) it is connected, the T mouths of solenoid directional control valve two (YV2) are connected with lower fuel tank；Solenoid directional control valve one (YV1) and solenoid directional control valve two (YV2) it is two four-way electromagnetic reversing valves of D types.
4. the precision pressure control system of servo-pump control hydraulic press according to claim 2, it is characterised in that：Middle flow is watched The export pipeline of clothes pump (B1) is connected by pressure regulator valve one (F1) with lower fuel tank, and the export pipeline of big flow servopump (B2) is logical Pressure regulator valve two (F2) is crossed with lower fuel tank to be connected, auxiliary feed-oil pipe (G5) also respectively by pressure regulator valve three (F3) and ball valve two (V2) with Lower fuel tank is connected.
5. the precision pressure control system of servo-pump control hydraulic press according to claim 3, it is characterised in that：Main pump outlet The outlet of pipeline (G3) is connected with the entrance of inserted valve eight (CZ8), outlet and the inserted valve nine (CZ9) of inserted valve eight (CZ8) Entrance is connected, and the outlet of inserted valve nine (CZ9) is connected with master cylinder cavity of resorption oil circuit (G1)；The hydraulic control mouth and shuttle of inserted valve eight (CZ8) The centre exit of valve (S1) is connected, and the right entry of shuttle valve (S1) is connected with the outlet of inserted valve eight (CZ8), and a left side for shuttle valve (S1) enters Mouth is connected with the A mouths of solenoid directional control valve eight (YV8), the entrance phase of the P mouths and inserted valve eight (CZ8) of solenoid directional control valve eight (YV8) Even, the T mouths of solenoid directional control valve eight (YV8) are connected with lower fuel tank, and solenoid directional control valve eight (YV8) is the two four-way electromagnetic commutations of D types Valve；The hydraulic control mouth of inserted valve nine (CZ9) is connected with the A mouths of solenoid directional control valve nine (YV9), the P mouths of solenoid directional control valve nine (YV9) with The outlet of inserted valve nine (CZ9) is connected, and the T mouths of solenoid directional control valve nine (YV9) are connected with lower fuel tank, solenoid directional control valve nine (YV9) For two-bit triplet solenoid directional control valve；Master cylinder cavity of resorption oil circuit (G1) is also connected by pressure regulator valve four (F4) with lower fuel tank.
6. the precision pressure control system of servo-pump control hydraulic press according to claim 5, it is characterised in that：Inserted valve nine (CZ9) entrance is connected with the entrance of inserted valve five (CZ5), and the outlet of inserted valve five (CZ5) is connected with lower fuel tank, inserted valve five (CZ5) hydraulic control mouth is connected with the A mouths of solenoid directional control valve five (YV5, YV6), and the B mouths of solenoid directional control valve five and T mouthfuls are respectively under Fuel tank is connected, and the P mouths of solenoid directional control valve five are connected by pressure regulator valve five (F5) with lower fuel tank, and the A mouths of solenoid directional control valve five pass through Pressure regulator valve six (F6) is connected with lower fuel tank, and solenoid directional control valve five is that Median Function is O-shaped three-position four-way electromagnetic directional valve.
7. the precision pressure control system of servo-pump control hydraulic press according to claim 6, it is characterised in that：Master cylinder epicoele Oil circuit (G2) is connected with the entrance of dynamic valve four (C4), and the outlet of dynamic valve four (C4) is connected with top tank, dynamic valve four (C4) Hydraulic control mouth A be connected with the A mouths of solenoid directional control valve four (YV4) by throttle valve, the hydraulic control mouth B of dynamic valve four (C4) passes through throttling Valve is connected with the B mouths of solenoid directional control valve four (YV4), and the P mouths of solenoid directional control valve four (YV4) are connected with control fluid pipe (G4), electricity The T mouths of magnetic reversal valve four (YV4) are connected with top tank, and solenoid directional control valve four (YV4) is two four-way electromagnetic reversing valves of D types；It is main Cylinder epicoele oil circuit (G2) is also connected with the entrance of proportioning valve (YAA), and the outlet of proportioning valve (YAA) is connected with fuel tank.
8. the precision pressure control system of servo-pump control hydraulic press according to claim 7, it is characterised in that：Servo motor One (M1) is controlled by servo-driver (SDR), and three-phase alternating-current supply is driven by breaker (QF1) and filter (EM1) with servo The power end connection of dynamic device (SDR), the encoder (PG) for being mounted on the tail portion servo motor one (M1) are connected to servo-driver (SDR) on the ports CN1, pump intake pressure sensor (PN1) is current feedback pressure sensor and is connected to servo-driver (SDR) on the ports CN2, the AIO+ of the A01 feet of the ports CN3 of servo-driver (SDR) and the SM231 modules of PLC controller Port is connected, the ports the AIO- phase of the AGND feet of the ports CN3 of servo-driver (SDR) and the SM231 modules of PLC controller Even；The CAN communication interface of servo-driver (SDR) is connected with the CANopen modules of PLC controller；Servo enables button (SB1) It is connected between the enabling signal input terminal (S-ON) of servo-driver (SDR) and the ports V1+, alarm reset button (SB2) is even It is connected between the reset signal input terminal (ALM-RST) of servo-driver (SDR) and the ports V1+；The coil of relay one (KA1) It is connected between the alarm signal end (ALM) of servo-driver (SDR) and the ports V1-, the normally open contact string of relay one (KA1) It is associated between 0.0 port and the ports V1+ of the SM223 modules of PLC controller；The coil of relay two (KA2) is connected to servo Between the Dual-pump flow-converging signal input part (TGON) of driver (SDR) and the ports V1-, the normally open contact string of relay two (KA2) It is associated between 0.1 port and the ports V1+ of the SM223 modules of PLC controller；The CPU of PLC controller passes through ethernet communication line It is connected with touch screen (PM1), the ports V1+ connect+24VDC, the ports V1- ground connection；Servo-driver (SDR) uses ProNet-2BDIB Ai Sidun servo-drivers, PLC controller use Siemens's 6ES7215-1BG40-0XB0 types.
9. a kind of precision pressure control system using servo-pump control hydraulic press according to any one of claims 8 carries out the side of hydraulic pressure processing Method, it is characterised in that：Each working cycles include following action successively：
(1) accumulator automatic compensation：It is first filled with the nitrogen of 6MPa into accumulator (AC) and starts servo motor two before sliding block action (M2) and keep solenoid directional control valve three (YV3) electric, small flow servo pump (B3) pumps out pressure oil and carries out ftercompction to accumulator (AC)；
(2) accumulator stops ftercompction：When the supercharging pressure of accumulator (AC) reaches 16Mpa, solenoid directional control valve three (YV3) dead electricity makes Inserted valve three (CZ3) is closed, while small flow servo pump (B3) stops；
(3) sliding block fast downlink：Solenoid directional control valve nine (YV9) electric must be such that inserted valve nine (CZ9) opens, and solenoid directional control valve five switches Inserted valve five (CZ5) is set to open to left station, the fluid of master cylinder cavity of resorption leads directly to oil return box；Solenoid directional control valve one (YV1) and electromagnetism Reversal valve two (YV2) at the same it is electric, big flow servopump (B2) and middle flow servo pump (B1) common fuel feeding, solenoid directional control valve seven (YV7) dynamic valve seven (C7) electric must be made to open rapidly, fluid enters master cylinder epicoele, while solenoid directional control valve four (YV4) dead electricity makes Dynamic valve four (C4) rapidly open, with sliding block it is fast under, the fluid of top tank fills into rapidly master cylinder epicoele；
(4) sliding block, which slows down, pressurizes：Solenoid directional control valve two (YV2) dead electricity makes dynamic valve two (C2) open rapidly, solenoid directional control valve one (YV1) it is kept as electricity, (B1) independent fuel feeding is pumped by middle flow servo；Solenoid directional control valve four (YV4) electric must make dynamic valve four (C4) Rapid to close, the pressure of master cylinder epicoele pumps (B1) by middle flow servo and directly controls, solenoid directional control valve five switch to right working position by Pressure regulator valve five (F5) controls the branch bulging of master cylinder cavity of resorption；
(5) sliding block pressurize：Each valve keeps step state (4) and stays for some time, and pressurize is controlled by flow servo pump (B1) Pressure；
(6) sliding block release：Proportioning valve (YAA) first it is electric, master cylinder upper cavity pressure is unloaded in advance；Then solenoid directional control valve one (YV1), solenoid directional control valve four (YV4), solenoid directional control valve five, solenoid directional control valve seven (YV7), solenoid directional control valve nine (YV9) lose Electricity, sliding block are able to complete release；
(7) sliding block backhaul：Solenoid directional control valve one (YV1) and solenoid directional control valve two (YV2) at the same electric, big flow servopump (B2) (B1) common fuel feeding is pumped with middle flow servo, solenoid directional control valve eight (YV8) electric must be such that inserted valve eight (CZ8) opens, electromagnetic switch Valve nine (YV9) electric must be such that inserted valve nine (CZ9) opens, and pressure oil enters the cavity of resorption of master cylinder, master cylinder band movable slider uplink；Proportioning valve (YAA) dead electricity is closed, and solenoid directional control valve seven (YV7) keeps dead electricity that dynamic valve seven (C7) is made to remain turned-off, solenoid directional control valve four (YV4) keep dead electricity that dynamic valve four (C4) is made to stay open, the fluid of master cylinder epicoele can be quickly returning to top tank；
(8) shut down：All equal dead electricity of solenoid directional control valve, servo motor stop.
10. the hydraulic pressure processing method of servo-pump control hydraulic press according to claim 9, it is characterised in that：When sliding block is quick When downlink, main pump outlet pipeline (G3) does not build pressure, the operating of servo-driver (SDR) flow control servo motor one (M1)； When sliding block slows down pressurization or pressurize, main pump outlet pipeline (G3) has been built pressure and has individually been supplied by middle flow servo pump (B1) Oil, the pressure of pump intake pressure sensor (PN1) flow servo pump (B1) outlet into servo-driver (SDR) Real-time Feedback, knot The high response for closing servo motor one (M1), the flow output of flow servo pump (B1), servo-driver (SDR) use in adjustment The oil pressure of PID adjusting control main pump outlet pipelines (G3) is realized and stablizes pressurization, avoids overshooting；When sliding block release, pass through telecommunications Number control proportioning valve (YAA) can not only realize fast pressure relief but also the linear opening of controllable opening, realize without impact, accomplish that sliding block is protected It is depressed into the smooth transition of release.
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CN112590294A (en) * 2020-11-26 2021-04-02 天津市天锻压力机有限公司 Multi-station servo extrusion hydraulic press
TWI829132B (en) * 2021-07-26 2024-01-11 日商日本製鋼所股份有限公司 Stamping device and control method of stamping device
CN116476409A (en) * 2023-03-24 2023-07-25 天津市天锻压力机有限公司 Quick die assembly and voltage establishment control system based on LFT-D press
CN116476409B (en) * 2023-03-24 2024-01-09 天津市天锻压力机有限公司 Quick die assembly and voltage establishment control system based on LFT-D press

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