CN106553378A - The electrichydraulic control press of steady pressure is provided - Google Patents
The electrichydraulic control press of steady pressure is provided Download PDFInfo
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- CN106553378A CN106553378A CN201611034086.5A CN201611034086A CN106553378A CN 106553378 A CN106553378 A CN 106553378A CN 201611034086 A CN201611034086 A CN 201611034086A CN 106553378 A CN106553378 A CN 106553378A
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B30—PRESSES
- B30B—PRESSES IN GENERAL
- B30B15/00—Details of, or accessories for, presses; Auxiliary measures in connection with pressing
- B30B15/16—Control arrangements for fluid-driven presses
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21D—WORKING OR PROCESSING OF SHEET METAL OR METAL TUBES, RODS OR PROFILES WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21D22/00—Shaping without cutting, by stamping, spinning, or deep-drawing
- B21D22/02—Stamping using rigid devices or tools
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B30—PRESSES
- B30B—PRESSES IN GENERAL
- B30B15/00—Details of, or accessories for, presses; Auxiliary measures in connection with pressing
- B30B15/16—Control arrangements for fluid-driven presses
- B30B15/22—Control arrangements for fluid-driven presses controlling the degree of pressure applied by the ram during the pressing stroke
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Abstract
The invention discloses a kind of electrichydraulic control press that steady pressure is provided, including actuator and hydraulic control；Actuator；Hydraulic control includes：First, second accumulator；First in-line and the second in-line；3 position-5 way valve；Booster body；Link gear；Hydraulically-damped controlling organization.The booster body of hydraulic control is coordinated with hydraulically-damped controlling organization so that punch rod is when into third trip section so that workpiece occurs elastic-plastic deformation, so as to meet the requirement that workpiece gradually increases to pressure in elastic-plastic deformation, hydraulic control causes punch rod to meet the change of three trip segment pressure, so that the workpiece stiffness for stamping out is preferably, and the scrappage of stamped workpieces is relatively low.3 position-5 way valve realizes linkage by link gear with punch rod.The pressure that the pressure ratio oil pump that accumulator is provided is provided is more stable, so that the workpiece stability for processing is good, interchangeability is higher.
Description
Technical field
The present invention relates to electro-mechanical arts, more particularly to a kind of electrichydraulic control press that steady pressure is provided.
Background technology
In prior art, punching press is carried out to workpiece generally using two kinds of power forms, one is as dynamic using machine driving
Power, i.e. machine power；Two is as power, i.e. hydraulic power using hydraulic drive.Generally, when workpiece deformation reduces, and workpiece
Elastoplasticity modulus it is less, workpiece deformation desirable pressure it is less when, it is more suitable using machine power because machine power makes
The punching press action for obtaining punch rod is very fast.When workpiece deforms larger, and the elastoplasticity modulus of workpiece is larger, workpiece deformation desirable pressure
It is when larger, more suitable using hydraulic power, because hydraulic power can provide larger pressure such that it is able to become workpiece
Shape is to final preset shape, and the mechanical property of the workpiece after punching press is preferable.
Engineers and technicians thought in the past, and during workpiece Pressing Deformation, workpiece need be only limited by constant stamping press i.e.
Molding can be completed, however, applicant is had found after analysis and summary in substantial amounts of shock pressure experiments using elastic plastic theory, in punching press
Cheng Zhong, workpiece have the deformation in two stages, the i.e. simple elastic deformation of starting stage and to the elastoplasticity after final molding
Mixed deformation, in the deformation process of starting stage, constant pressure can just make workpiece that constant deformation occurs, and when follow-up
The elastic-plastic deformation stage, need gradual supercharging just make workpiece continue deformation, so as to final molding.In order that workpiece can
Punch rod is actually disposed above the pressure needed for elastic-plastic deformation to the pressure of workpiece by final molding, engineers and technicians all the time
Power, and make the pressure keep constant (because engineers and technicians think that whole deformation pressure process is constant), so as to ability
Workpiece punch forming is made, so that workpiece is in the elastic deformation of starting stage, the pressure being subject to is much larger than desirable pressure, so
And, the higher constant pressure makes the deformation in the stage very fast, so as to cause the stage to be unable to homogeneous deformation, can not in the stage
Homogeneous deformation causes shaping workpiece mechanical property poor, and such as rigidity is poor, or punching press failure.
As technical staff thinks that stamped workpieces only need higher constant pressure, therefore, engineers and technicians are setting
When counting or selecting mechanically or hydraulically power, punch rod need to be only made to keep constant higher forced feed.Therefore, existing skill
The hydraulic system for driving punch rod in art can only provide constant pressure to punch rod, according to the foregoing description of applicant
Understand, the workpiece mechanics stamped out using the hydraulic system is poor.
According to the foregoing description of applicant, punch rod should have three trip segments carrying out punching course, i.e. punch rod be entered
Elastic deformation trip segment (second stroke of workpiece elastic deformation is made to the idle stroke section (the first trip segment) to workpiece, punch rod
Section) and punch rod make workpiece that elastic-plastic deformation final stamping forming elastic-plastic deformation trip segment (third trip to occur
Section).
Additionally, the hydraulic system for being used for punching press in prior art also has the disadvantages that：
1st, the backhaul control of punch rod is complicated, and backhaul reaction is not sensitiveer.
2nd, during punch rod backhaul, opening speed is unstable, causes each return interval different.
3rd, the first stage of punch rod and second stage feed speed are unstable, and pressure change response is slower.
The content of the invention
For above-mentioned technical problem present in existing technology, implementing for the present invention can solve the problem that above-mentioned one there is provided one kind
The electrichydraulic control press of the offer steady pressure of individual or Railway Project.
To solve above-mentioned technical problem, the technical solution used in the present invention is：
A kind of electrichydraulic control press that steady pressure is provided, for stamped workpieces, including actuator and for institute
State actuator pressure is provided and the hydraulic control of the actuator is controlled；Wherein：
The actuator includes performing cylinder body, be arranged in the execution cylinder body and the execution cylinder body being divided into cavity of resorption
Room and upper chamber perform piston and with it is described perform piston be connected and from the lower chambers stretch out for stamped workpieces
Punch rod, the punch rod have be fed to the first trip segment of absorption surface, by workpiece punching press to initial deformation state
Second trip segment and by workpiece stamping forming third trip section；
Hydraulic control includes：
First accumulator and the second accumulator, the pressure provided by first accumulator is less than second accumulator
Pressure；
First in-line and the second in-line, first accumulator are connected with first in-line, described
Second accumulator is connected with second in-line；
3 position-5 way valve, which has two oil-ins and three oil-outs, first in-line and described
Two in-lines are connected with two oil-ins respectively, and three oil-outs connect first, second and third fluid pressure line respectively；First hydraulic pressure
Pipeline and the second fluid pressure line are connected with the upper chamber；The valve element of 3 position-5 way valve has by movement in one direction
The first in-line is connected with the first fluid pressure line, and the first in-line and the second in-line with the second fluid pressure line
The first displaced segments for disconnecting with the 3rd fluid pressure line and having makes the second in-line connect with the second fluid pressure line, and first
Second displacement section that in-line and the second in-line are disconnected with the first fluid pressure line and the 3rd fluid pressure line and having makes
Second in-line is connected with the 3rd fluid pressure line, and the first in-line and the second in-line with the first fluid pressure line and
The triple motion section that second fluid pressure line disconnects；So that when the punch rod is fed in the first trip segment, the 3 position-5 way is changed
The first displaced segments are in the valve element of valve, first in-line is connected with the upper chamber by the first fluid pressure line, institute
When stating punch rod and being fed to the second trip segment, the valve element of the 3 position-5 way valve switches to second displacement section, the punching press
Bar feed is connected with the upper chamber to the second trip segment, second in-line by the second fluid pressure line；
Booster body, which includes that reducing plunger shaft, first be arranged in the diameter segment of the reducing plunger shaft live
Plug, be arranged in the larger-diameter section of the reducing plunger shaft second piston, be fixed on state on first piston first company
Bar and the second connecting rod for being fixed in the second piston and being oppositely arranged with the first connecting rod, wherein, described first lives
Reducing plunger shaft is divided into path chamber, big footpath chamber and middle part chamber, the first connecting rod by plug and the second piston
It is located in the middle part chamber with the second connecting rod, the 3rd fluid pressure line leads to the big footpath chamber, the path chamber
Room is connected with the upper chamber by the first connecting pipeline；
Link gear, which is used to make the punch rod enter to give in the first trip segment, the second trip segment and third trip section
First displaced segments of the valve element of the 3 position-5 way valve, second displacement section and triple motion section set up corresponding relation, described
Link gear include positioned at it is described perform cylinder body side and be obliquely installed and can rotate rocking bar, two ends respectively with described three
The valve rod of the valve element of 5 way valve and rocking bar connection and be arranged in the punch rod and with the rocking bar against
Push rod, so that during the punching press bar feed, the push rod pushes against the rocking bar and rotates, the rocking bar drives the valve rod to drive
The valve element of the 3 position-5 way valve is moved in one direction, and make three trip segments of the punching press bar feed with it is described
The interaction relation of three position sections of the valve element of 3 position-5 way valve is arranged to：When the punch rod is fed in the first trip segment
When, the valve element of the 3 position-5 way valve is moved in the first displaced segments；When the punch rod is fed in the second trip segment, institute
The valve element for stating 3 position-5 way valve is moved in second displacement section；When the punch rod is fed in third trip section, described three
The valve element of position-5 way valve is moved in triple motion section；When the punch rod is fed to third trip section, the 3rd liquid
Pressure pipe road enters the big footpath chamber；
Hydraulically-damped controlling organization, it include the end for being fixed on the first connecting rod buffering cylinder body, be fixed on it is described
The damper piston in the buffering cylinder body is simultaneously stretched in the end of second connecting rod, wherein, the damper piston and the buffering cylinder body
A buffer chamber is surrounded, the cushion chamber falls are provided with for the buffer spring against the damper piston, the cushion chamber
Room is connected with the 3rd accumulator by choke valve, and the middle part chamber is connected with the 3rd accumulator, the 3rd accumulator
Highest limit pressure less than second fluid pressure line pressure.
Preferably, it is also unidirectional including first be separately positioned on first fluid pressure line and second fluid pressure line
Valve and the second check valve, first check valve and second check valve prevent the hydraulic oil backflow of the upper chamber.
Preferably, also including backhaul controlling organization, the backhaul controlling organization includes the pressure being arranged in stamping mold
Sensor, the bi-bit bi-pass reversal valve being connected with the upper chamber by the second connecting pipeline and according to the pressure transducer
Signal control the bi-bit bi-pass and commutate the controller of valve events, first in-line is connected with the lower chambers, with
Make, when the punch rod completes third trip section, the punch rod is leaned against on the pressure transducer, the pressure transducer
Control the bi-bit bi-pass reversal valve and make second connecting pipeline to the controller, the controller pressure signal transmission
Connect with fuel tank so that the hydraulic oil in the epicoele room returns the fuel tank.
Preferably, the 3 position-5 way valve is proportional reversing valve.
Compared with prior art, the beneficial effect of the of the invention electrichydraulic control press for providing steady pressure is：Liquid
The booster body of pressure controlling organization coordinates with hydraulically-damped controlling organization so that punch rod is into third trip section so that workpiece
During generation elastic-plastic deformation, pressure is constantly raised, so as to meet the requirement that workpiece gradually increases to pressure in elastic-plastic deformation,
As the hydraulic control of the present invention causes punch rod to meet the change of three trip segment pressure, so that the workpiece for stamping out
Rigidity is preferable, and the scrappage of stamped workpieces is relatively low.
The aperture of the choke valve is sized to control the time of first piston and second piston in differential state, also controls
The displacement advanced when in differential state by first piston and second piston, when being reacted to punch rod, i.e. choke valve can be controlled
Increment rate of the punch rod unit displacement (feeding displacement) processed to workpiece pressure, it is also possible to control the punch rod unit interval to workpiece pressure
The increment rate of power.So as to control increase rate of change of the workpiece in the requirement pressure in elastic-plastic deformation stage, so as to punching press not
With material and the workpiece of size, molding is allowed to.
3 position-5 way valve realizes linkage by link gear with punch rod, that is to say, that punch rod is displacement
Mechanical signal pass to 3 position-5 way valve, and the mechanical signal is converted into into hydraulic pressure letter by 3 position-5 way valve
Number, and here is converted to the mechanical action of punch rod by hydraulic pressure signal.
The pressure and power of hydraulic control is provided (the first accumulator and the second accumulator) by two accumulators, and first
Accumulator and the second accumulator are respectively the pressure needed for three trip segments offer workpiece of punch rod and feeding power, accumulator
The pressure that the pressure ratio oil pump of offer is provided is more stable, so that the workpiece stability for processing is good, interchangeability is higher.
Hydraulic control in the electrichydraulic control press of the offer steady pressure of the present invention is relative to prior art
In hydraulic control, can more meet the actual requirement of workpiece deformation, the workpiece of punching press is better than the liquid using prior art
The workpiece that pressure controlling organization stamps out.
Description of the drawings
Fig. 1 is the structural representation of the electrichydraulic control press of the offer steady pressure of the present invention.
In figure：
The first in-lines of 1-；The second in-lines of 2-；The first accumulators of 3-；The first fluid pressure lines of 4-；The second hydraulic pressure of 5-
Pipeline；The 3rd fluid pressure lines of 6-；7- 3 position-5 way valves；8- first pistons；9- second pistons；The big footpath chambers of 10-；11- is little
Footpath chamber；12- second connecting rods；13- first connecting rods；Chamber in the middle part of 14-；15- damper pistons；16- buffer chambers；17- buffering elastics
Spring；18- choke valves；The 3rd accumulators of 19-；The first connecting pipelines of 20-；The first check valves of 21-；The second check valves of 22-；On 23-
Chamber；24- lower chambers；25- performs piston；The second connecting pipelines of 26-；27- bi-bit bi-pass reversal valves；28- controllers；29- is oily
Case；30- punch rods；31- push rods；32- rocking bars；33- valve rods；34- pressure transducers；35- stamping molds；36- workpiece；37 the 3rd
Connecting pipeline；The second accumulators of 38-.
Specific embodiment
To make those skilled in the art be better understood from technical scheme, below in conjunction with the accompanying drawings and specific embodiment party
Formula elaborates to the present invention.
Before the electrichydraulic control press of offer steady pressure for introducing the present invention, the workpiece 36 that is stamped is introduced first and is rushed
The process of compressive strain, and the punch rod 30 (or claiming pressure head) of stamped workpieces 36 whole punching course several trip segments so as to
Deep enough can understand technical scheme and friendship effect.
Traditionally, workpiece 36 need it is i.e. plastic by enough and constant pressure, however, workpiece 36 is in actual change
In shape, with the deformation desirable pressure difference of different phase.Workpiece 36 experiences two kinds of deformations from blank to molding altogether, and one is initial
The simple elastic deformation in stage, now, the enough constant pressure of 30 need of punch rod can make workpiece 36 carry out elastic change
Shape；Two is elastoplasticity mixed deformation, both there is elastic deformation and has in this stage and there is plastic deformation, and now, punch rod 30 is being entered
The colleague for giving needs gradually to increase pressure, so that 36 final molding of workpiece.
From the foregoing, it will be observed that needing to be fed to work with three trip segments, i.e. punch rod 30 in punching course for punch rod 30
The idle stroke section (the first trip segment) of part 36, punch rod 30 make elastic deformation trip segment (second stroke of 36 elastic deformation of workpiece
Section) and punch rod 30 make workpiece 36 that elastic-plastic deformation final stamping forming elastic-plastic deformation trip segment (the third line to occur
Journey section).
In the first trip segment, actuating unit (can be machine power or hydraulic power) only need to provide motion for punch rod 30
, in the second trip segment, actuating unit to be that punch rod 30 provides certain constant pressure so that 36 elastic deformation of workpiece,
In third trip section, actuating unit to be the pressure that punch rod 30 provides the second trip segment of start bit, and entering with punch rod 30
To the pressure that pressure gradually rises, so that workpiece 36 realizes elastic-plastic deformation.
The present invention is based on foregoing description, there is provided one kind enables punch rod 30 provide corresponding pressure in three trip segments
The electrichydraulic control press of the offer steady pressure of power
As shown in figure 1, embodiment of the invention discloses that a kind of electrichydraulic control press for providing steady pressure, is used for
Stamped workpieces 36, provide pressure including actuator and for actuator and control the hydraulic control of actuator；Its
In：Actuator includes performing cylinder body, be arranged on and perform in cylinder body and be divided into lower chambers 24 and upper chamber 23 by cylinder body is performed
The punch rod 30 for stamped workpieces 36 for performing piston 25 and being connected and stretch out from lower chambers 24 with execution piston 25, punching press
Bar 30 have be fed to contact with workpiece 36 the first trip segment, by the second trip segment of 36 punching press of workpiece to initial deformation state
And by 36 stamping forming third trip section of workpiece；Hydraulic control includes：First accumulator 3 and the second accumulator 38,
Pressure of the pressure provided by first accumulator 3 less than the second accumulator 38；First in-line 1 and the second in-line 2, the
One accumulator 3 is connected with the first in-line 1, and the second accumulator 38 is connected with the second in-line 2；3 position-5 way valve 7,
There is two oil-ins and three oil-outs, the first in-line 1 and the second in-line 2 to be connected with two oil-ins respectively for which
Connect, three oil-outs connect first, second and third fluid pressure line respectively；Firstth fluid pressure line 4 and the second fluid pressure line 5 and epicoele
Room 23 connects；The valve element of 3 position-5 way valve 7 has by movement in one direction makes the first in-line 1 and the firstth liquid
Pressure pipe road 4 connects, and the first in-line 1 and the second in-line 2 are broken with the second fluid pressure line 5 and the 3rd fluid pressure line 6
The first displaced segments for opening and having makes the second in-line 2 connect with the second fluid pressure line 5, and the first in-line 1 and second
Second displacement section that in-line 2 is disconnected with the firstth fluid pressure line 4 and the 3rd fluid pressure line 6 and have and make the second oil-feed
Pipeline 2 is connected with the 3rd fluid pressure line 6, and the first in-line 1 and the second in-line 2 with the firstth fluid pressure line 4 and
The triple motion section that second fluid pressure line 5 disconnects；With when punch rod 30 is fed in the first trip segment, 3 position-5 way valve 7
Valve element be in the first displaced segments, the first in-line 1 connected with upper chamber 23 by the firstth fluid pressure line 4, punch rod 30
When being fed to the second trip segment, the valve element of 3 position-5 way valve 7 switches to second displacement section, and punch rod 30 is fed to the second row
Journey section, the second in-line 2 are connected with upper chamber 23 by the second fluid pressure line 5；Booster body, it include reducing plunger shaft,
The first piston 8 that is arranged in the diameter segment of reducing plunger shaft, it is arranged in the larger-diameter section of reducing plunger shaft
Second piston 9, be fixed on the first connecting rod 13 stated on first piston 8 and be fixed in second piston 9 and with first connecting rod 13
The second connecting rod 12 being oppositely arranged, wherein, reducing plunger shaft is divided into path chamber 11, big by first piston 8 and second piston 9
Footpath chamber 10 and middle part chamber 14, first connecting rod 13 and second connecting rod 12 are located in middle part chamber 14, and the 3rd fluid pressure line 6 leads to
To big footpath chamber 10, path chamber 11 is connected with upper chamber 23 by the first connecting pipeline 20；Link gear, which is used to make punching press
Bar 30 enters to give the first displacement of the valve element of 3 position-5 way valve 7 in the first trip segment, the second trip segment and third trip section
Section, second displacement section and triple motion section set up corresponding relation, and link gear includes positioned at execution cylinder body side and is obliquely installed
And the valve rod 33, Yi Jishe that the rocking bar 32, two ends that can be rotated is connected with the valve element and rocking bar 32 of 3 position-5 way valve 7 respectively
Put in punch rod 30 and with rocking bar 32 against push rod 31, during so that punch rod 30 feeding, the pushing and pressing rocking bar 32 of push rod 31 is rotated,
Rocking bar 32 is moved with the valve element for driving 3 position-5 way valve 7 in one direction with ovable valve stem 33, and feeds punch rod 30
Three trip segments be arranged to the interaction relation of three position sections of the valve element of 3 position-5 way valve 7：When punch rod 30 exists
When first trip segment feeds, the valve element of 3 position-5 way valve 7 is moved in the first displaced segments；When punch rod 30 is in the second trip segment
During feeding, the valve element of 3 position-5 way valve 7 is moved in second displacement section；When punch rod 30 is fed in third trip section, three
The valve element of position-5 way valve 7 is moved in triple motion section；When punch rod 30 is fed to third trip section, the 3rd fluid pressure line
6 enter big footpath chamber 10；Hydraulically-damped controlling organization, which includes the buffering cylinder body of the end for being fixed on first connecting rod 13, fixation
In the end of second connecting rod 12 and stretch into buffering cylinder body in damper piston 15, wherein, damper piston 15 with buffer cylinder body surround
One buffer chamber 16, is provided with for the buffer spring 17 against damper piston 15 in buffer chamber 16, and buffer chamber 16 passes through
Choke valve 18 is connected with the 3rd accumulator 19, and middle part chamber 14 is connected with the 3rd accumulator 19, the highest limit of the 3rd accumulator 19
Pressure of the constant-pressure less than the second fluid pressure line 5.
In a preferred embodiment of the invention, as shown in Figure 1, there is provided the electrichydraulic control press of steady pressure is also
Including the first check valve 21 and the second check valve 22 that are separately positioned on the firstth fluid pressure line 4 and the second fluid pressure line 5, the
One check valve 21 and the second check valve 22 prevent the hydraulic oil backflow of upper chamber 23.
In a preferred embodiment of the invention, as shown in Figure 1, there is provided the electrichydraulic control press of steady pressure is also
Including backhaul controlling organization, backhaul controlling organization includes the pressure transducer 34 being arranged in stamping mold 35, connects by second
Second two way selected valve 27 and control second according to the signal of pressure transducer 34 that siphunculus road 26 is connected with upper chamber 23
The controller 28 of position 27 action of two way selected valve, first in-line 1 pass through third connecting pipe 37 and the lower chambers
24 connections, so that, when punch rod 30 completes third trip section, punch rod 30 is leaned against on pressure transducer 34, pressure transducer
34 by pressure signal transmission to controller 28, the control second of controller 28 two way selected valve 27 makes the second connecting pipeline 26 and oil
Case 29 connects the hydraulic oil oil sump tank 29 so that in upper chamber 23.
Preferably, 3 position-5 way valve 7 is proportional reversing valve.
Technical scheme and beneficial effect are understood for convenience, and offer steady pressure of the invention is provided
The electrichydraulic control press course of work.
Before the electrichydraulic control press course of work that steady pressure is provided is introduced, introduce the present invention's first
The supercharging principle and the work of hydraulically-damped controlling organization of the booster body in the electrichydraulic control press of offer steady pressure
Make principle, to be better understood from the electrichydraulic control press course of work of the present invention.
If first piston 8 and second piston 9 are subject to the thrusts of hydraulic oil and stress balance, and first piston 8 and the
Both two pistons 9 are rigidly connected, i.e., by a connecting rod connection, first piston 8 and second is lived for first piston 8 and second piston 9
Plug 9 is synchronized with the movement all the time, and the hydraulic oil in path chamber 11 should be equal to the liquid in big footpath chamber 10 to the thrust of first piston 8
Thrust of the force feed to second piston 9, i.e. (wherein, P1 is the pressure of the hydraulic oil in path chamber 11 to P1S1=P2S2, and P2 is big
The pressure of the hydraulic oil in footpath chamber 10, areas of section of the S1 for first piston 8；Areas of section of the S2 for second piston 9), by
It is more than the area of section S1 of first piston 8 in the area of section S2 of second piston 9, so that the hydraulic oil in path chamber 11
Pressure P2s of the pressure P1 more than the hydraulic oil in big footpath chamber 10, therefore, when hydraulic oil enters the big footpath chamber 10 of booster body
Afterwards, pressure of the pressure of the hydraulic oil of the conveying of path chamber 11 more than the hydraulic oil in big footpath chamber 10, specific size relation with
First piston 8 is relevant with the area of section ratio of second piston 9.
Should explain：The pressure change relation of above-mentioned booster body be built upon two-piston only by hydraulic oil thrust simultaneously
And two-piston is synchronized with the movement on the premise of (as two-piston is rigidly connected) and draws.
Hydraulically-damped controlling organization causes first piston 8 and second piston 9 to connect by first connecting rod 13 and second connecting rod 12
Connect, when the big footpath chamber 10 in booster body is not passed through or is passed through the hydraulic oil of lower pressure, and while the 3rd accumulator 19
The hydraulic oil of certain pressure is provided into buffer chamber 16, so that first connecting rod 13 and second connecting rod 12 keep geo-stationary,
Buffer spring 17 is in less compressive state, now, the hydraulic oil in big footpath chamber 10, path chamber 11, middle part chamber 14
Pressure and buffer spring 17 thrust of first connecting rod 13 and second connecting rod 12 is caused at first piston 8 and second piston 9
In static and poised state, first piston 8 and second piston 9 are regarded as generally in poised state.When being passed through to big footpath chamber 10
During the higher hydraulic oil of relative pressure (more than the pressure that the 3rd accumulator 19 is provided), the hydraulic oil pushing and pressing the in big footpath chamber 10
Two pistons 9 are broken so that balancing, and second piston 9 drives damper piston 15 to move towards first piston 8 in the presence of thrust, together
When damper piston 15 movement make hydraulic oil in buffer chamber 16 constantly through choke valve 18 to the punching of the 3rd accumulator 19 fill can,
Buffer spring 17 is constantly compressed, and in the process, first connecting rod 13 is moved towards path chamber 11 all the time with second connecting rod 12, but
The translational speed of second connecting rod 12 is more than first connecting rod 13 so that two connecting rods form differential, namely second piston 9 and first
Piston 8 forms differential, and to after being compressed to buffer spring 17 completely, first is even just synchronized with the movement with second connecting rod 12, Ye Ji
Two pistons 9 are synchronized with the movement with first piston 8, and now the stress balance of first piston 8 and second piston 9 is set up again.According to upper
The supercharging principle to booster body stated, when first piston 8 is in poised state with second piston 9, in path chamber 11
The pressure P1 of hydraulic oil could be more than the pressure P2 of the hydraulic oil in big footpath chamber 10, in the initial shape of hydraulically-damped controlling organization
During state, pressure in big footpath chamber 10 is less for Pa, so that the pressure in path chamber 11 is Pb, when into big footpath chamber 10
Pressure is passed through for Pa ' (Pa ') Pa) hydraulic oil when, because being provided with hydraulically-damped control machine between first piston 8 and second piston 9
Structure so that path chamber 11 in hydraulic fluid pressure be not increased to Pb ' corresponding with Pa ' during poised state at once,
And start slowly to rise from Pb, until buffer spring 17 is fully compressed, first piston 8 and second piston 9 are synchronized with the movement and reach
To after new balance, the pressure in path chamber 11 just reaches Pb ' from Pb.
From the foregoing, booster body can make the pressure in path chamber 11 initial from one with hydraulically-damped controlling organization
The predetermined pressure of pressure rise, so that the pressure in upper chamber 23 gradually rises, so that stamping parts is right in third trip section
Workpiece 36 produces continuous elevated pressure, to meet the requirement of 36 elastic-plastic deformation of workpiece.
As shown in figure 1, the holding for stamped workpieces 36 of the electrichydraulic control press of the offer steady pressure of the present invention
Units are punch rod 30, and hydraulic control is for providing power for punch rod 30 and makes stamping parts in above three trip segment
In apply corresponding pressure to workpiece 36, and be additionally operable to control the backhaul of punch rod 30.
After hydraulic system starts fuel feeding, punch rod 30 starts in the feeding of the first trip segment and constantly near workpiece 36, this
When, the pushing and pressing rocking bar 32 of push rod 31 being arranged in link gear in punch rod 30 moves 32 rotational band ovable valve stem 33 of rocking bar, valve
The movement of bar 33 makes the valve element of 3 position-5 way valve 7 move in the first displaced segments, now, 1 (the first oil inlet pipe of the first in-line
Because being connected with the first accumulator 3, its pressure is less than the pressure of the second in-line 2 on road 1) enter through 3 position-5 way valve 7
Firstth fluid pressure line 4, enters upper chamber 23 after the firstth fluid pressure line 4, and hydraulic oil is into after upper chamber 23 because of itself
Pressure is relatively low, so as to only provide feed motion (certainly, also can provide pressure less power) for punch rod 30 simultaneously, so that
Constantly feeding is further contacted punch rod 30 with workpiece 36, and now, punch rod 30 starts to be fed to the second trip segment, and punch rod
30 make the valve element of 3 position-5 way valve 7 be moved to second displacement section by push rod 31, rocking bar 32 and valve rod 33.
After punch rod 30 contacts workpiece 36, punch rod 30 starts to be fed to the second trip segment, and while 3 position-5 way is changed
Second displacement section is moved to the valve element of valve 7,13 position-5 way valve 7 of the first in-line, the second in-line 2 pass through three
Position-5 way valve 7 enters the second fluid pressure line 5, and hydraulic oil is passed through upper chamber 23 through the second fluid pressure line 5, due to for
The pressure provided more than the first accumulator 3 by the pressure provided by second accumulator 38 of 2 fuel feeding of the second in-line, second enters
Pressure in oil pipe line 2 and the second fluid pressure line 5 is more than the pressure in the first in-line 1 and the firstth fluid pressure line 4, and this
When, the pressure of the hydraulic oil in upper chamber 23 is equal to the pressure in the second fluid pressure line 5, also, by second fluid pressure line 5
Pressure is arranged to make the hydraulic oil of the pressure push against execution piston 25, makes punch rod 30 that workpiece 36 is met to the pressure of workpiece 36
The elastic deformation of raw original state, so as to punch rod 30 makes workpiece 36 that the elasticity of original state occurs when the second trip segment feeds
Deformation, so as to complete the second trip segment, workpiece 36 completes the elastic deformation of original state.
After the feeding of punch rod 30 completes the second trip segment, third trip section, and punch rod 30 are initially entered by top
Bar 31, rocking bar 32 and valve rod 33 make the valve element of 3 position-5 way valve 7 be moved to triple motion section.Now, the second oil inlet pipe
Road 2 is closed with the second fluid pressure line 5, and the second in-line 2 connects (the 3rd fluid pressure line 6 and second with the 3rd fluid pressure line 6
In-line 2 is connected, and its pressure is identical with the second in-line 2, and with punch rod 30 when the second trip segment feeds, the second liquid
The pressure on pressure pipe road 5 is also identical), the hydraulic oil in the 3rd fluid pressure line 6 enters the big footpath chamber 10 of booster body, according to supercharging
The above-mentioned buffering course of the above-mentioned pressurization and hydraulically-damped controlling organization of mechanism understands, in the valve of 3 position-5 way valve 7
When core is in second displacement section, i.e., when punch rod 30 is also in the second trip segment, as upper chamber 23 passes through the first connecting pipeline
20 are connected with path chamber 11, then the pressure of the hydraulic oil in upper chamber 23 is equal to the pressure of the hydraulic oil in path chamber 11,
The pressure can make 30 stamped workpieces 36 of punch rod make workpiece 36 that elastic deformation to occur, therefore, just start feeding in punch rod 30
During to third trip section, the pressure in path chamber 11 is equal to the pressure of the hydraulic oil in the second trip segment of punch rod 30, when three
The valve element of position-5 way valve 7 is switched to after triple motion section from second displacement section, hydraulic oil (liquid of the 3rd fluid pressure line 6
The pressure that there is provided of the pressure of force feed higher than the 3rd accumulator 19, namely more than the pressure of the hydraulic oil in buffer chamber 16,
And equal to the pressure of the hydraulic oil in path chamber 11) in big footpath chamber 10, the hydraulic oil in the big footpath chamber 10 is pushed against
Second piston 9 is moved towards first piston 8, and damper piston 15 makes the hydraulic oil in buffer chamber 16 under the driving of second piston 9
The 3rd accumulator 19 is entered through choke valve 18, and while compresses buffer spring 17, in the process, first piston 8 and second
Piston 9 is moved towards path chamber 11, simply translational speed of the translational speed of second piston 9 more than first piston 8, so as to shape
Into differential, now, with the continuous movement of first piston 8 and second piston 9, the pressure of the hydraulic oil in path chamber 11 is gradually
Raise, so that punch rod 30 constantly increases to the pressure of workpiece 36 in third trip section, when buffer spring 17 is fully compressed
Afterwards, first piston 8 and second piston 9 start to be synchronized with the movement, 9 stress balance of first piston 8 and second piston, so that path
The pressure of the hydraulic oil in chamber 11 reaches maximum, so that punch rod 30 reaches maximum, punch rod 30 to the pressure of workpiece 36
Make 36 punch forming of workpiece.
After 36 punch forming of workpiece, punch rod 30 is pressed against on the pressure transducer 34 in stamping mold 35, the pressure
Sensor 34 by signal transmission to controller 28, to inform the 28 punch forming of workpiece 36 of controller, the control of controller 28 the
27 action of bi-bit bi-pass reversal valve, so that the second connecting pipeline 26 is connected with fuel tank 29, the hydraulic oil in upper chamber 23 is passed through
Second connecting pipeline 26 and second two way selected valve 27 enter fuel tank 29, and the first inlet ductwork passes through third connecting pipe 37
Piston 25 is performed to drive punch rod 30 backhaul to promote into lower chambers 24.So far, punch rod 30 completes a punching course,
One workpiece 36 of processing.
The present invention key point be：The booster body of hydraulic control coordinates with hydraulically-damped controlling organization so that punching
When into third trip section so that workpiece 36 occurs elastic-plastic deformation, pressure is constantly raised depression bar 30, so as to meet workpiece 36
Requirement pressure gradually increased in elastic-plastic deformation, as the hydraulic control of the present invention causes punch rod 30 to meet three
The change of individual trip segment pressure, so that 36 rigidity of workpiece for stamping out is preferably, and the scrappage of stamped workpieces 36 is relatively low.
Should illustrate：In hydraulically-damped controlling organization, it should make the area of section and first piston 8 of second piston 9
The ratio of area of section be equal to workpiece 36 when the pressure needed for elastic deformation stage and workpiece 36 are in elastic-plastic deformation it is required most
The ratio of big pressure, that is to say, that can be become in elastoplasticity according to the pressure and workpiece 36 needed for workpiece 36 is in elastic deformation stage
During shape, required maximum pressure designs the area of section of two-piston.
Hydraulically-damped controlling organization control punch rod 30 is to set to a key factor of the rate of pressure rise of workpiece 36
Put choke valve 18, the aperture of the choke valve 18 be sized to control first piston 8 and second piston 9 in differential state when
Between, the displacement advanced when in differential state by first piston 8 and second piston 9 is also controlled, when being reacted to punch rod 30,
That is, choke valve 18 can control increment rate of 30 unit displacement of punch rod (feeding displacement) to 36 pressure of workpiece, it is also possible to control
Increment rate of 30 unit interval of punch rod to 36 pressure of workpiece.So as to control requirement of the workpiece 36 in the elastic-plastic deformation stage
The increase rate of change of pressure, so as to the workpiece 36 of punching press different materials and size, is allowed to molding.
The present invention another key point be：3 position-5 way valve 7 is realized by link gear with punch rod 30
Linkage, that is to say, that punch rod 30 passes to 3 position-5 way valve 7 the mechanical signal of displacement, and by the mechanical signal
Hydraulic pressure signal is converted into by 3 position-5 way valve 7, and here is converted to the mechanical action of punch rod 30 by hydraulic pressure signal.
The present invention another key point be：The pressure and power of hydraulic control provides (by two accumulators
38), the first accumulator 3 and the second accumulator 38 are respectively three trip segments of punch rod 30 for one accumulator 3 and the second accumulator
The pressure and feeding power needed for workpiece 36 is provided, the pressure that the pressure ratio oil pump that accumulator is provided is provided is more stable, so that
36 stability of workpiece for processing is good, and interchangeability is higher.
Hydraulic control in the electrichydraulic control press of present invention offer steady pressure is relative in prior art
Hydraulic control, can more meet the actual requirement of the deformation of workpiece 36, the workpiece 36 of punching press is better than using prior art
The workpiece 36 that hydraulic control stamps out.
Above example is only the exemplary embodiment of the present invention, is not used in the restriction present invention, protection scope of the present invention
It is defined by the claims.Those skilled in the art can be made respectively to the present invention in the essence and protection domain of the present invention
Modification or equivalent are planted, this modification or equivalent also should be regarded as being within the scope of the present invention.
Claims (4)
1. it is a kind of provide steady pressure electrichydraulic control press, for stamped workpieces, it is characterised in that including actuator
And provide pressure for the actuator and control the hydraulic control of the actuator；Wherein：
The actuator include perform cylinder body, be arranged on it is described execution cylinder body in and by it is described execution cylinder body be divided into lower chambers and
The punching press for stamped workpieces for performing piston and being connected and stretch out from the lower chambers with the execution piston of upper chamber
Bar, the punch rod have be fed to the first trip segment of absorption surface, by workpiece punching press to the second of initial deformation state
Trip segment and by workpiece stamping forming third trip section；
Hydraulic control includes：
First accumulator and the second accumulator, pressure of the pressure provided by first accumulator less than second accumulator
Power；
First in-line and the second in-line, first accumulator are connected with first in-line, and described second
Accumulator is connected with second in-line；
3 position-5 way valve, which has two oil-ins and three oil-outs, and first in-line and described second enters
Oil pipe line is connected with two oil-ins respectively, and three oil-outs connect first, second and third fluid pressure line respectively；First fluid pressure line
It is connected with the upper chamber with the second fluid pressure line；The valve element of 3 position-5 way valve is by mobile with making the in one direction
One in-line is connected with the first fluid pressure line, and the first in-line and the second in-line with the second fluid pressure line and
The first displaced segments that three fluid pressure lines disconnect and having makes the second in-line connect with the second fluid pressure line, and the first oil-feed
Second displacement section that pipeline and the second in-line are disconnected with the first fluid pressure line and the 3rd fluid pressure line and have and make second
In-line is connected with the 3rd fluid pressure line, and the first in-line and the second in-line with the first fluid pressure line and second
The triple motion section that fluid pressure line disconnects；With when the punch rod is fed in the first trip segment, the 3 position-5 way valve
Valve element be in the first displaced segments, first in-line connected with the upper chamber by the first fluid pressure line, the punching
When depression bar is fed to the second trip segment, the valve element of the 3 position-5 way valve switches to second displacement section, and the punch rod is entered
To the second trip segment, second in-line is connected with the upper chamber by the second fluid pressure line；
Booster body, which includes reducing plunger shaft, the first piston being arranged in the diameter segment of the reducing plunger shaft, sets
Put the second piston in the larger-diameter section of the reducing plunger shaft, be fixed on the first connecting rod stated on first piston and
The second connecting rod for being fixed in the second piston and being oppositely arranged with the first connecting rod, wherein, the first piston and institute
State second piston and reducing plunger shaft is divided into into path chamber, big footpath chamber and middle part chamber, the first connecting rod and described
Second connecting rod is located in the middle part chamber, and the 3rd fluid pressure line leads to the big footpath chamber, and the path chamber passes through
First connecting pipeline is connected with the upper chamber；
Link gear, its be used to making the punch rod enter to give in the first trip segment, the second trip segment and third trip section it is described
First displaced segments of the valve element of 3 position-5 way valve, second displacement section and triple motion section set up corresponding relation, the linkage
Mechanism include positioned at it is described perform cylinder body side and be obliquely installed and can rotate rocking bar, two ends respectively with the 3 position-5 way
The valve rod of the valve element of reversal valve and rocking bar connection and be arranged in the punch rod and with the rocking bar against top
Bar, so that during the punching press bar feed, the push rod pushes against the rocking bar and rotates, the rocking bar drives the valve rod to drive
The valve element for stating 3 position-5 way valve is moved in one direction, and makes three trip segments and described three of the punching press bar feed
The interaction relation of three position sections of the valve element of position-5 way valve is arranged to：When the punch rod is fed in the first trip segment
When, the valve element of the 3 position-5 way valve is moved in the first displaced segments；When the punch rod is fed in the second trip segment, institute
The valve element for stating 3 position-5 way valve is moved in second displacement section；When the punch rod is fed in third trip section, described three
The valve element of position-5 way valve is moved in triple motion section；When the punch rod is fed to third trip section, the 3rd liquid
Pressure pipe road enters the big footpath chamber；
Hydraulically-damped controlling organization, which includes the buffering cylinder body of the end for being fixed on the first connecting rod, is fixed on described second
The damper piston in the buffering cylinder body is simultaneously stretched in the end of connecting rod, wherein, the damper piston is surrounded with the buffering cylinder body
One buffer chamber, the cushion chamber falls are provided with for the buffer spring against the damper piston, and the buffer chamber is led to
Cross choke valve to connect with the 3rd accumulator, the middle part chamber is connected with the 3rd accumulator, the 3rd accumulator is most
The high pressure for limiting pressure less than second fluid pressure line.
2. the electrichydraulic control press that steady pressure is provided according to claim 1, it is characterised in that also including respectively
The first check valve being arranged on first fluid pressure line and second fluid pressure line and the second check valve, described first is single
The hydraulic oil backflow of the upper chamber is prevented to valve and second check valve.
3. it is according to claim 1 provide steady pressure electrichydraulic control press, it is characterised in that also including backhaul
Controlling organization, pressure transducer that the backhaul controlling organization includes being arranged in stamping mold, by the second connecting pipeline with
Bi-bit bi-pass reversal valve and changed according to the signal of the pressure transducer control bi-bit bi-pass that the upper chamber connects
To the controller of valve events, first in-line is connected with the lower chambers, so that, when the punch rod completes the third line
During journey section, the punch rod is leaned against on the pressure transducer, and pressure signal transmission is given the control by the pressure transducer
Device, the controller controls the bi-bit bi-pass reversal valve makes second connecting pipeline connect with fuel tank so that the upper chamber
Interior hydraulic oil returns the fuel tank.
4. it is according to claim 3 provide steady pressure electrichydraulic control press, it is characterised in that described three five
Logical reversal valve is proportional reversing valve.
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| CN201611034086.5A CN106553378B (en) | 2016-11-22 | 2016-11-22 | The electrichydraulic control press of steady pressure is provided |
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| CN201611034086.5A CN106553378B (en) | 2016-11-22 | 2016-11-22 | The electrichydraulic control press of steady pressure is provided |
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| CN106553378A true CN106553378A (en) | 2017-04-05 |
| CN106553378B CN106553378B (en) | 2018-07-27 |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114951628A (en) * | 2021-02-24 | 2022-08-30 | 宝山钢铁股份有限公司 | Continuous casting submersed nozzle clamping system and method |
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| US5170691A (en) * | 1989-08-15 | 1992-12-15 | Baatrup Johannes V | Fluid pressure amplifier |
| EP0686776A1 (en) * | 1994-04-25 | 1995-12-13 | MANNESMANN Aktiengesellschaft | Multi-function valve |
| CN1144299A (en) * | 1995-04-18 | 1997-03-05 | 新苏舍柴油机有限公司 | Hydraulic stepped piston arrangement and its use in drive with variable thrust force |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN114951628A (en) * | 2021-02-24 | 2022-08-30 | 宝山钢铁股份有限公司 | Continuous casting submersed nozzle clamping system and method |
| CN114951628B (en) * | 2021-02-24 | 2024-04-05 | 宝山钢铁股份有限公司 | Continuous casting immersion nozzle clamping system and method |
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|---|---|
| CN106553378B (en) | 2018-07-27 |
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Effective date of registration: 20180612 Address after: 528415 Yuanfeng Industrial Zone ninth, Ronghua South Road, Xiaolan Town, Zhongshan, Guangdong (East District property B105) Applicant after: Guangdong three hydraulic Co., Ltd. Address before: No. 7 Huan Hu Road, Hexi District, Tianjin, Tianjin, 222 Applicant before: Tianjin Zhou Han Technology Co. Ltd. |
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