CN106368994B - Electrichydraulic control press - Google Patents
Electrichydraulic control press Download PDFInfo
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- CN106368994B CN106368994B CN201611036080.1A CN201611036080A CN106368994B CN 106368994 B CN106368994 B CN 106368994B CN 201611036080 A CN201611036080 A CN 201611036080A CN 106368994 B CN106368994 B CN 106368994B
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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
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Abstract
The invention discloses a kind of electrichydraulic control press, are used for stamped workpieces, including executing agency and provide pressure for the executing agency and control the hydraulic control of the executing agency；Hydraulic control includes: the first, second and third fluid pressure line；Pressure reducing valve；First control unit；Booster body；Second control unit；Magnetic force control mechanism.Booster body and magnetic force control mechanism are set in hydraulic control, the booster body and magnetic force control mechanism cooperate so that punch rod is when entering third trip section so that elastic-plastic deformation occurs for workpiece, pressure constantly increases, to meet the requirement that workpiece gradually increases pressure in elastic-plastic deformation, since hydraulic control of the invention makes punch rod meet the variation of three trip segment pressure, to keep the workpiece stiffness stamped out preferable, and the scrappage of stamped workpieces is lower.
Description
Technical field
The present invention relates to electrohydraulic control technology field more particularly to a kind of electrichydraulic control press.
Background technique
In the prior art, punching press is carried out to workpiece and usually utilizes two kinds of power forms, first is that using machine driving as dynamic
Power, i.e. machine power；Second is that using hydraulic drive as power, i.e. hydraulic power.In general, when workpiece deformation reduces, and workpiece
Elastoplasticity modulus it is smaller, workpiece deform needed for pressure it is smaller when, it is more appropriate using machine power because machine power makes
The punching press movement for obtaining punch rod is very fast.When workpiece deforms larger, and the elastoplasticity modulus of workpiece is larger, pressure needed for workpiece deforms
It is more appropriate using hydraulic power when larger, because hydraulic power is capable of providing biggish pressure, so as 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 needs be only limited by constant stamping press i.e.
Achievable molding, however, applicant is had found after analysis and summary in a large amount of shock pressure experiments using elastic plastic theory, in punching press
Cheng Zhong, workpiece tool is there are two the deformation in stage, i.e. the simple flexible deformation of initial stage and to the elastoplasticity after final molding
Mixed deformation, in the deformation process of initial stage, constant pressure can just make workpiece that constant deformation occur, and when subsequent
The elastic-plastic deformation stage, need gradually be pressurized just workpiece can be made to continue to deform, thus final molding.In order to enable workpiece
Final molding, pressure needed for pressure of the punch rod to workpiece is actually disposed above elastic-plastic deformation by engineers and technicians always
Power, and the pressure is made to keep constant (because engineers and technicians think that whole deformation pressure process is constant), thus ability
Make workpiece punch forming, to make workpiece in the flexible deformation of initial stage, the pressure being subject to is much larger than required pressure, so
And the higher constant pressure keeps the deformation in the stage very fast, is unable to homogeneous deformation so as to cause the stage, at this stage cannot
Homogeneous deformation causes shaping workpiece mechanical property poor, as rigidity is poor or punching press failure.
Higher constant pressure is needed since technical staff thinks stamped workpieces only, engineers and technicians are setting
When counting or selecting mechanically or hydraulically power, it need to only make the higher forced feed that punch rod is kept constant.Therefore, existing skill
It is used to drive the hydraulic system of punch rod that can only provide constant pressure to punch rod in art, according to the foregoing description of applicant
It is found that poor using the workpiece mechanics that the hydraulic system stamps out.
According to the foregoing description of applicant, punch rod should have there are three trip segment carrying out punching course, i.e., punch rod into
Make the flexible deformation trip segment (second stroke of workpiece flexible deformation to idle stroke section (first stroke section), the punch rod to workpiece
Section) and punch rod make workpiece that elastic-plastic deformation and final stamping forming elastic-plastic deformation trip segment (third trip occur
Section).
In addition, also being had the disadvantages that for the hydraulic system of punching press in the prior art
1, the backhaul of punch rod controls complicated, and backhaul reaction is not sensitiveer.
2, when punch rod backhaul, opening speed is unstable, causes each return interval different.
3, the first stage of punch rod and second stage feed speed are unstable, and pressure change response is slower.
Summary of the invention
For above-mentioned technical problem present in existing technology, of the invention implementing provides one kind and is able to solve above-mentioned one
A or Railway Project electrichydraulic control press.
In order to solve the above technical problems, the technical solution adopted by the present invention is that:
A kind of electrichydraulic control press is used for stamped workpieces, including executing agency and provides for the executing agency
Pressure and the hydraulic control for controlling the executing agency；Wherein:
The executing agency includes executing cylinder body, be arranged in the execution cylinder body and the execution cylinder body being divided into left chamber
The execution piston of room and right chamber and connect with the execution piston and that stretches out from the left chamber is used for stamped workpieces
Punch rod, the punch rod, which has, is fed to the first stroke section contacted with workpiece, by workpiece punching press to initial deformation state
Second stroke section and by the stamping forming third trip section of workpiece；
Hydraulic control includes:
First, second and third fluid pressure line, three connect with hydraulic system；
Pressure reducing valve is arranged on the first fluid pressure line；
First control unit, according to the trip segment of the punch rod control the first fluid pressure line and the second fluid pressure line with
The on-off of the right chamber, so that first fluid pressure line passes through first when the punch rod is when first stroke section is fed
Connecting pipeline is connected to the right chamber, described when the punch rod is fed to second stroke section from the first stroke section
Second fluid pressure line is connected to by the first connecting pipeline with the right chamber；
Booster body comprising variable diameter plunger shaft, first be arranged in the diameter segment of the variable diameter plunger shaft are living
The second piston and the connection first piston and described second fill in, being arranged in the larger-diameter section of the variable diameter plunger shaft
The connecting rod of piston, wherein variable diameter plunger shaft is divided into path chamber, major diameter chamber by the first piston and the second piston
And middle part chamber, the third fluid pressure line lead to the major diameter chamber, the path chamber by the second connecting pipeline with
The right chamber connection；
Second control unit is arranged on the third fluid pressure line, and second control unit is according to the punching press
The trip segment of bar controls the on-off of the third fluid pressure line, so that when the punch rod is fed to the third line from second stroke section
When journey section, the third fluid pressure line conducting；
Magnetic force control mechanism comprising two electromagnetism in the center lumen room and for pushing against the second piston are set
The displacement sensor for executing the trip segment on cylinder body and for obtaining the punch rod is arranged in and according to institute's rheme in iron
The controller of the size of the magnetic repulsion of feeding two electromagnet of Process flowchart of third trip section acquired in displacement sensor, so as to work as
After the punch rod is fed to third trip section, the controller controls the magnetic repulsion between two electromagnet so that magnetic repulsion
Reduce with the feeding process of the punch rod so that the pressure of the indoor hydraulic oil of path chamber with the punch rod into
It is increased from the pressure value for being equal to the indoor hydraulic oil of left chamber to process.
Preferably, the first control unit is hydraulic directional valve, and the spool of the hydraulic directional valve has and makes described the
One fluid pressure line is connected to the right chamber by the first connecting pipeline and makes second fluid pressure line and the right chamber simultaneously
The first position and be connected to second fluid pressure line with the right chamber and simultaneously by the first connecting pipeline that room disconnects
The second position for disconnecting first fluid pressure line and the right chamber；The spool of the hydraulic directional valve by respectively with institute
State the control of the first control piper and the second control piper being connected to the right chamber of left chamber's connection in first position and
Switch between the second position, so that when the punch rod is fed to second stroke section from first stroke section, the commutation of surging
The spool of valve switches to the second position by first position.
Preferably, second control unit is Mechanical Driven reversal valve, and the spool of the Mechanical Driven reversal valve has
The first position that third fluid pressure line is connected and the second position for disconnecting the third fluid pressure line, the electrichydraulic control
Press further includes trigger mechanism, and the trigger mechanism includes connecting with the spool of the Mechanical Driven reversal valve and towards described
The mandril that punch rod direction is stretched out and the first protruding portion being arranged in the punch rod, first protruding portion is in the punching
Extend the distance of third trip section in the direction of feed of compression bar, to be fed to third trip from second stroke section when the punch rod
Duan Shi, first protruding portion pushes against the mandril so that the mandril drives the spool of the Mechanical Driven reversal valve from second
Position switches to first position.
Preferably, the electrichydraulic control press further include trigger switch, the third that is electrically connected with the trigger switch
Control unit and the 4th control unit are additionally provided with the backhaul control-rod for stretching out the right chamber on the execution piston, described
The second protruding portion for triggering the trigger switch is provided on backhaul control-rod, the third control unit is arranged described
On first connecting pipeline, the third control unit has the first state for making the first connecting pipeline conducting and makes described
That first connecting pipeline disconnects and the second state that the right chamber is connected with fuel tank, the 4th control unit setting is in institute
It states on the first control piper, the 4th control unit has the first state for making the first control piper conducting and makes institute
The second state for stating the disconnection of the first control piper, when the punch rod completes third trip section, the second protruding portion triggering
The trigger switch makes the 4th control unit so that the third control unit switches to the second state by its first state
Second state is switched to by first state；First fluid pressure line is connected to by third connecting pipe with the left chamber.
Preferably, the third control unit and the 4th control unit are solenoid directional control valve.
Compared with prior art, the beneficial effect of electrichydraulic control press of the invention is: in hydraulic control
Booster body and magnetic force control mechanism are set, and the booster body and magnetic force control mechanism cooperate so that punch rod is entering the third line
Journey section so that workpiece occur elastic-plastic deformation when, pressure constantly increases, thus meet workpiece in elastic-plastic deformation to pressure by
Gradually increased requirement, since hydraulic control of the invention makes punch rod meet the variation of three trip segment pressure, thus
Keep the workpiece stiffness stamped out preferable, and the scrappage of stamped workpieces is lower.
Detailed description of the invention
Fig. 1 is the structural schematic diagram of electrichydraulic control press of the invention.
In figure:
The first fluid pressure line of 1-；The second fluid pressure line of 2-；3- third fluid pressure line；The first connecting pipeline of 4-；5- second connects
Siphunculus road；6- pressure reducing valve；The first control piper of 7-；The second control piper of 8-；9- third connecting pipe；10- first control unit；
The second control unit of 11-；12- third control unit；The 4th control unit of 13-；14- first piston；15- second piston；16- connects
Bar；17- path chamber；18- major diameter chamber；Chamber in the middle part of 19-；20- executes cylinder body；21- executes piston；22- punch rod；23-
Backhaul control-rod；24- left chamber；25- right chamber；26- controller；27- displacement sensor；The first protruding portion of 28-；29- mandril；
30- electromagnet；The second protruding portion of 31-；32- trigger switch；33- fuel tank.
Specific embodiment
Technical solution in order to enable those skilled in the art to better understand the present invention, with reference to the accompanying drawing and specific embodiment party
Formula elaborates to the present invention.
Before introducing electrichydraulic control press of the invention, the process for the workpiece Pressing Deformation that is stamped is introduced first, with
And the punch rod 22 (or pressure head) of stamped workpieces entire punching course several trip segments so as to deeply understand this hair
Bright technical solution and beneficial effect.
Traditionally, workpiece needs i.e. plastic by enough and constant pressure, however, workpiece is in practical distortion
In, pressure needed for the deformation with different phase is different.Workpiece undergoes two kinds of deformations to molding from blank altogether, first is that the initial stage
Simple flexible deformation, at this point, the enough constant pressure of 22 need of punch rod can make workpiece carry out flexible deformation；Second is that
Elastoplasticity mixed deformation, both there is flexible deformation in this stage has in the presence of being plastically deformed, at this point, punch rod 22 is while feeding
It needs to gradually increase pressure, to make workpiece final molding.
From the foregoing, it will be observed that needing to have there are three trip segment in punching course for punch rod 22, i.e. punch rod 22 is fed to work
Idle stroke section (first stroke section), the punch rod 22 of part make the flexible deformation trip segment (second stroke section) of workpiece flexible deformation with
And punch rod 22 makes workpiece that elastic-plastic deformation and final stamping forming elastic-plastic deformation trip segment (third trip section) occur.
In first stroke section, power mechanism (can be machine power or hydraulic power) only need to be that punch rod 22 provides movement
, in second stroke section, power mechanism to provide certain constant pressure for punch rod 22 so that workpiece flexible deformation,
Third trip section, power mechanism will provide the pressure of start bit second stroke section for punch rod 22, and with the feeding of punch rod 22
The pressure that pressure gradually rises, so that workpiece be made to realize elastic-plastic deformation.
The present invention is based on foregoing descriptions, and providing one kind enables punch rod 22 to be capable of providing corresponding pressure in three trip segments
The electrichydraulic control press of power
As shown in Figure 1, stamped workpieces are used for embodiment of the invention discloses a kind of electrichydraulic control press, including
Executing agency and pressure is provided for executing agency and controls the hydraulic control of executing agency；Wherein: executing agency includes
It executes cylinder body 20, the execution piston 21 for executing in cylinder body 20 and dividing execution cylinder body 20 for left chamber 24 and right chamber 25 is set
And with execute piston 21 connect and from left chamber 24 stretch out the punch rod 22 for stamped workpieces, punch rod 22 with feed
It is struck out to the first stroke section contacted with workpiece, by the second stroke section of workpiece punching press to initial deformation state and by workpiece
The third trip section of type；Hydraulic control includes: the first, second and third fluid pressure line, and three connect with hydraulic system；Decompression
Valve 6 is arranged on the first fluid pressure line 1；First control unit 10, it is hydraulic according to the control first of the trip segment of punch rod 22
The on-off of pipeline 1 and the second fluid pressure line 2 and right chamber 25, so that when punch rod 22 is when first stroke section is fed, the first liquid
Pressure pipe road 1 is connected to by the first connecting pipeline 4 with right chamber 25, when punch rod 22 is fed to second stroke section from first stroke section
When, the second fluid pressure line 2 is connected to by the first connecting pipeline 4 with right chamber 25；Booster body comprising variable diameter plunger shaft is set
Set in the diameter segment of variable diameter plunger shaft first piston 14, variable diameter plunger shaft is set larger-diameter section in
Two pistons 15 and the connecting rod 16 for connecting first piston 14 and second piston 15, wherein first piston 14 and second piston 15 will
Variable diameter plunger shaft is divided into path chamber 17, major diameter chamber 18 and middle part chamber 19, and third fluid pressure line 3 leads to major diameter chamber
18, path chamber 17 is connected to by the second connecting pipeline 55 with right chamber 25；Second control unit 11 is arranged hydraulic in third
On pipeline 3, the second control unit 11 controls the on-off of third fluid pressure line 3 according to the trip segment of punch rod 22, so as to work as punching press
When bar 22 is fed to third trip section from second stroke section, third fluid pressure line 3 is connected；Magnetic force control mechanism comprising setting
Two electromagnet 30, setting in middle part chamber 19 and for pushing against second piston 15 are on executing cylinder body 20 and for obtaining punching
The feeding process of the displacement sensor 27 of the trip segment of compression bar 22 and the third trip section according to acquired in displacement sensor 27
The controller 26 of the size of the magnetic repulsion of two electromagnet 30 is controlled, so that after punch rod 22 is fed to third trip section, control
Device 26 controls the magnetic repulsion between two electromagnet 30 so that magnetic repulsion reduces with the feeding process of punch rod 22, so that path chamber
The pressure of hydraulic oil in room 17 with punch rod 22 feeding process from be equal to left chamber 24 in hydraulic oil pressure value and
It increases.
In a preferred embodiment of the invention, first control unit 10 is hydraulic directional valve, the valve of hydraulic directional valve
Core has and so that the first fluid pressure line 1 is passed through the first connecting pipeline 4 and right chamber 25 and make the second fluid pressure line 2 and right chamber simultaneously
25 first positions disconnected and make the second fluid pressure line 2 be connected to the first connecting pipeline 4 to be connected to right chamber 25 and make the simultaneously
The second position that one fluid pressure line 1 is disconnected with right chamber 25；The spool of hydraulic directional valve, which passes through, to be respectively connected to left chamber 24
The control of first control piper 7 and the second control piper 8 being connected to right chamber 25 is cut between the first position and the second position
It changes, so that the spool of hydraulic directional valve is cut by first position when punch rod 22 is fed to second stroke section from first stroke section
Shift to the second position.
In a preferred embodiment of the invention, the second control unit 11 is Mechanical Driven reversal valve, and Mechanical Driven is changed
The second position that there is the first position that third fluid pressure line 3 is connected to the spool of valve and disconnect third fluid pressure line 3,
Electrichydraulic control press further includes trigger mechanism, and trigger mechanism includes connecting with the spool of Mechanical Driven reversal valve and towards punching press
The mandril 29 that 22 direction of bar is stretched out and the first protruding portion 28 being arranged in punch rod 22, the first protruding portion 28 is in punch rod 22
Direction of feed on extend the distance of third trip section, with when punch rod 22 is fed to third trip section from second stroke section,
First protruding portion 28 pushing and pressing mandril 29 is so that mandril 29 drives the spool of Mechanical Driven reversal valve to switch to first from the second position
Position.
In a preferred embodiment of the invention, electrichydraulic control press further includes trigger switch 32, opens with triggering
The third control unit 12 and the 4th control unit 13 of 32 electrical connections are closed, is additionally provided with the backhaul control for stretching out right chamber 25 on piston
Bar 23 processed, the second protruding portion 31 for triggering trigger switch 32 is provided on backhaul control-rod 23, and third control unit 12 is set
It sets on the first connecting pipeline 4, third control unit 12 has the first state that the first connecting pipeline 4 is connected and makes first
The second state that is that connecting pipeline 4 disconnects and making right chamber 25 and the conducting of fuel tank 33, the setting of the 4th control unit 13 is in the first control
On tubulation road 7, the 4th control unit 13 has the first state that the first control piper 7 is connected and makes the first control piper 7
The second state disconnected, when punch rod 22 completes third trip section, the second protruding portion 31 triggers trigger switch 32 so that third
Control unit 12 switches to the second state by its first state, and the 4th control unit 13 is made to switch to the second shape by first state
State；First fluid pressure line 1 is connected to by third connecting pipe 99 with left chamber 24.
In a preferred embodiment of the invention, third control unit 12 and the 4th control unit 13 are electromagnetic switch
Valve.
For convenience of technical solution of the present invention and beneficial effect is understood, electrichydraulic control pressure of the invention is described below
Machine work process.
Before introducing the electrichydraulic control press course of work, electrichydraulic control press machine of the invention is introduced first
The pressurization principle of booster body in tool.
Liquid if first piston 14 and the second piston 15 only stress balance by the thrust of hydraulic oil, in path chamber 17
Pressure oil should be equal to the hydraulic oil in major diameter chamber 18 to the thrust of second piston 15, i.e. P1S1=to the thrust of first piston 14
(wherein, P1 is the pressure of the hydraulic oil in path chamber 17 to P2S2, and P2 is the pressure of the hydraulic oil in major diameter chamber 18, and S1 is
The area of section of first piston 14；S2 is the area of section of second piston 15), since the area of section S2 of second piston 15 is greater than
The area of section S1 of first piston 14, so that the pressure P1 of the hydraulic oil in path chamber 17 be made to be greater than the liquid in major diameter chamber 18
The pressure P1 of pressure oil, therefore, after hydraulic oil enters the major diameter chamber 18 of booster body, when the hydraulic oil that path chamber 17 conveys
Pressure be greater than the pressure of the hydraulic oil in major diameter chamber 18, specific size relationship and first piston 14 and second piston 15 are cut
Face area ratio is related.
It should explain: before the pressure change relationship of above-mentioned booster body is built upon piston by the thrust of hydraulic oil
It puts and obtains.
As shown in Figure 1, the executive component for stamped workpieces of electrichydraulic control press of the invention is punch rod 22,
Hydraulic control is used to provide power for punch rod 22 and applies stamping parts in above three trip segment to workpiece and corresponds to
Pressure, and be also used to control the backhaul of punch rod 22.
After hydraulic system starts fuel feeding, punch rod 22 starts close to workpiece and contact workpiece, at this point, as the first control
The spool of the hydraulic directional valve of unit 10 is in first position, and the first fluid pressure line 1 is after pressure reducing valve 6 reduces pressure by surging
Reversal valve (as first control unit 10) enters right chamber 25 into the first connecting pipeline 4 after the first connecting pipeline 4,
Hydraulic oil enters after right chamber 25 because pressure itself is lower, so that only providing feed motion for punch rod 22 (certainly, can also work together
The lesser power of pressure is provided), to make punch rod 22 constantly feed and then be contacted with workpiece, when punch rod 22 is contacted with workpiece
Afterwards, workpiece generates reaction force to punch rod 22 to resist the flexible deformation of workpiece, and punch rod 22, which passes to counter-force, executes work
Plug 21, so that the pressure of the hydraulic oil in right chamber 25 be made to increase, the pressure of the increase is transferred to liquid by the second control piper 8
The right end of the spool of dynamic reversal valve (as first control unit 10), to drive hydraulic directional valve (as first control unit
10) spool switches to the second position from first position.
After 22 contact workpiece of punch rod, punch rod 22 initially enters second stroke section, at this point, hydraulic directional valve (first
Control unit 10) spool switch to the second position from first position, the first fluid pressure line 1 is by hydraulic directional valve (as
One control unit 10) it closes, the second fluid pressure line 2 begins through hydraulic directional valve (as first control unit 10) into first
Connecting pipeline 4, and right chamber 25 is entered by the first connecting pipeline 4, due to being not provided with pressure reducing valve 6 on the second fluid pressure line 2,
Pressure in second fluid pressure line 2 is greater than the pressure in the first fluid pressure line 1, and the pressure of the hydraulic oil in right chamber 25 is equal to
Pressure in second fluid pressure line 2, also, it is arranged to make the hydraulic oil of the pressure to push against the pressure of second fluid pressure line 2
Piston 21 is executed, so that punch rod 22 is met the flexible deformation that original state occurs for workpiece to the pressure of workpiece, thus punch rod 22
Make workpiece that the flexible deformation of original state occur in the feeding of second stroke section, to complete second stroke section, workpiece is completed just
The flexible deformation of beginning state.
After punch rod 22, which is fed, completes second stroke section, third trip section is initially entered, first in punch rod 22 is prominent
Out portion 28 be arranged position just can when punch rod 22 enters third trip section, the first protruding portion 28 just with triggering machine
The mandril 29 of structure contacts, and pushes against mandril 29, which drives the Mechanical Driven reversal valve as the second control unit 11
Spool switches to first position from the second position, to make third fluid pressure line 3 (the third fluid pressure line 3 and the second hydraulic tube
Road 2 is connected to, and pressure is identical as the second fluid pressure line 2) conducting, so that the hydraulic oil in third fluid pressure line 3 be made to enter pressurization
The major diameter chamber 18 of mechanism, according to the above-mentioned pressurization of booster body it is found that if not set electromagnet 30 in middle part chamber 19,
Increase the pressure in path chamber 17 at once, thus increase the pressure of the hydraulic oil entered in right chamber 25 at once,
To make punch rod 22 when being fed to third trip section, the pressure of workpiece is increased at once, this does not obviously meet workpiece in bullet
(workpiece requires pressure gradually to rise from the pressure of elastic deformation stage in elastic-plastic deformation for requirement of the plastic period to pressure
It is high), to prevent pressure from increasing suddenly, two electromagnets are arranged in the present invention in middle part chamber 19, and an electromagnet 30 is fixed on
In second piston 15, another is fixed on the chamber wall opposite with second piston 15, and electromagnet 30 is controlled by controller 26,
And the specific trip segment that punch rod 22 is fed can be identified by executing the displacement sensor 27 on cylinder body 20, when punch rod 22 enters
After third trip section, displacement sensor 27 constantly sends the displacement information of punch rod 22 to controller 26, the controller 26
Two electromagnet 30 are controlled according to displacement information and generate initial magnetic repulsion, and are constantly fed with punch rod 22 in third trip section, and magnetic is made
Repulsion constantly reduces, and the initial magnetic repulsion should meet the pressure quilt being higher by major diameter chamber 18 made in path chamber 17
The initial magnetic repulsion is offset, that is, meets pressure balanced balanced type are as follows: and P1S1+F=P2S2 (wherein F is magnetic repulsion) is big as F
It is small be initial magnetic repulsion when, P1=P2, the pressure when magnetic repulsion F is constantly smaller with the feeding of punch rod 22, in path chamber 17
Pressure in power and right chamber 25 constantly increases, to make punch rod 22 in the feeding of third trip section, pressure is constantly increased,
Meet requirement of the workpiece elastic-plastic deformation to pressure.Since the first protruding portion 28 is along the axially extending third trip section of punch rod 22
Distance, thus make punch rod 22 third trip section feeding when, third fluid pressure line 3 is connected always, to make booster body
Constantly make pressure rise, to make workpiece punch forming.
After workpiece punch forming, the second protruding portion 31 on backhaul control-rod 23 is exactly in contact with trigger switch 32, triggering
Switch 32 controls third control unit 12 and the 4th control unit 13, makes the hydraulic oil oil return box 33 in right chamber 25, left chamber
Hydraulic oil driving in 24 executes piston 21, to make 22 backhaul of punch rod.So far, punch rod 22 completes a punching course,
Process a workpiece.
Key point of the invention is: booster body and magnetic force control mechanism, the pressurization being arranged in hydraulic control
Mechanism and the cooperation of magnetic force control mechanism are so that punch rod 22 when entering third trip section so that elastic-plastic deformation occurs for workpiece, is pressed
Power constantly increases, to meet the requirement that workpiece gradually increases pressure in elastic-plastic deformation, due to hydraulic control of the invention
Mechanism processed makes punch rod 22 meet the variation of three trip segment pressure, to keep the workpiece stiffness stamped out preferable, and rushes
Press the scrappage of workpiece lower.
Hydraulic control in electrichydraulic control press of the present invention compared with the existing technology in hydraulic control,
The actual requirement of workpiece deformation can more be met, what the workpiece of punching press stamped out better than the hydraulic control using the prior art
Workpiece.
Claims (5)
1. a kind of electrichydraulic control press is used for stamped workpieces, which is characterized in that including executing agency and be the execution
Mechanism provides pressure and controls the hydraulic control of the executing agency；Wherein:
The executing agency include execute cylinder body, be arranged in the execution cylinder body and by the execution cylinder body be divided into left chamber and
The execution piston of right chamber and the punching press for stamped workpieces for connecting and being stretched out from the left chamber with the execution piston
Bar, the punch rod have be fed to the first stroke section contacted with workpiece, by workpiece punching press to initial deformation state second
Trip segment and by the stamping forming third trip section of workpiece；
Hydraulic control includes:
First, second and third fluid pressure line, three connect with hydraulic system；
Pressure reducing valve is arranged on the first fluid pressure line；
First control unit, according to the trip segment of the punch rod control the first fluid pressure line and the second fluid pressure line with it is described
The on-off of right chamber, so that first fluid pressure line passes through the first connection when the punch rod is when first stroke section is fed
Pipeline is connected to the right chamber, when the punch rod is fed to second stroke section from the first stroke section, described second
Fluid pressure line is connected to by the first connecting pipeline with the right chamber；
Booster body comprising variable diameter plunger shaft, is set the first piston being arranged in the diameter segment of the variable diameter plunger shaft
It sets the second piston in the larger-diameter section of the variable diameter plunger shaft and connects the first piston and the second piston
Connecting rod, wherein the first piston and the second piston by variable diameter plunger shaft be divided into path chamber, major diameter chamber and
Middle part chamber, the third fluid pressure line lead to the major diameter chamber, the path chamber by the second connecting pipeline with it is described
Right chamber connection；
Second control unit is arranged on the third fluid pressure line, and second control unit is according to the punch rod
Trip segment controls the on-off of the third fluid pressure line, so that when the punch rod is fed to third trip section from second stroke section
When, the third fluid pressure line conducting；
Hydraulically-damped control mechanism comprising two electromagnetism in the center lumen room and for pushing against the second piston are set
The displacement sensor for executing the trip segment on cylinder body and for obtaining the punch rod is arranged in and according to institute's rheme in iron
The controller of the size of the magnetic repulsion of feeding two electromagnet of Process flowchart of third trip section acquired in displacement sensor, so as to work as
After the punch rod is fed to third trip section, the controller controls the magnetic repulsion between two electromagnet so that magnetic repulsion
Reduce with the feeding process of the punch rod so that the pressure of the indoor hydraulic oil of path chamber with the punch rod into
It is increased from the pressure value for being equal to the indoor hydraulic oil of left chamber to process.
2. electrichydraulic control press according to claim 1, which is characterized in that the first control unit is to surge to change
To valve, the spool of the hydraulic directional valve, which has, connects first fluid pressure line by the first connecting pipeline and the right chamber
Lead to and make simultaneously the first position of second fluid pressure line and right chamber disconnection and leads to second fluid pressure line
Cross the first connecting pipeline is connected to the right chamber and makes simultaneously first fluid pressure line and right chamber disconnection second
Position；The spool of the hydraulic directional valve pass through the first control piper for being connected to respectively with the left chamber and with the right chamber
The control of second control piper of connection switches between the first position and the second position, so as to work as the punch rod from the first row
When journey section is fed to second stroke section, the spool of the hydraulic directional valve switches to the second position by first position.
3. electrichydraulic control press according to claim 1, which is characterized in that second control unit is mechanical drives
Dynamic reversal valve, the spool of the Mechanical Driven reversal valve have the first position that third fluid pressure line is connected and make described the
The second position that three fluid pressure lines disconnect, the electrichydraulic control press further includes trigger mechanism, and the trigger mechanism includes
It is connect with the spool of the Mechanical Driven reversal valve and towards the mandril of punch rod direction stretching and setting in the punching press
The first protruding portion on bar, first protruding portion extend the distance of third trip section in the direction of feed of the punch rod,
With when the punch rod is fed to third trip section from second stroke section, first protruding portion pushes against the mandril so that institute
Stating mandril drives the spool of the Mechanical Driven reversal valve to switch to first position from the second position.
4. electrichydraulic control press according to claim 2, which is characterized in that the electrichydraulic control press also wraps
Trigger switch, the third control unit being electrically connected with the trigger switch and the 4th control unit are included, is gone back on the execution piston
It is provided with the backhaul control-rod for stretching out the right chamber, is provided on the backhaul control-rod for triggering the trigger switch
Second protruding portion, the third control unit are arranged on first connecting pipeline, and the third control unit has and makes institute
State the first state of the first connecting pipeline conducting and make that first connecting pipeline disconnects and make the right chamber and fuel tank
Second state of conducting, the 4th control unit are arranged on first control piper, and the 4th control unit has
The second state for making the first state of the first control piper conducting and disconnecting first control piper, when the punching
When compression bar completes third trip section, second protruding portion trigger the trigger switch so that the third control unit by its
One state switches to the second state, and the 4th control unit is made to switch to the second state by first state；Described first is hydraulic
Pipeline is connected to by third connecting pipe with the left chamber.
5. electrichydraulic control press according to claim 4, which is characterized in that the third control unit and described
Four control units are solenoid directional control valve.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201611036080.1A CN106368994B (en) | 2016-11-22 | 2016-11-22 | Electrichydraulic control press |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201611036080.1A CN106368994B (en) | 2016-11-22 | 2016-11-22 | Electrichydraulic control press |
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| CN106368994B true CN106368994B (en) | 2019-06-11 |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| JPS58212831A (en) * | 1982-06-03 | 1983-12-10 | Sumitomo Heavy Ind Ltd | Bottom knock out device of forging press |
| CN201389592Y (en) * | 2009-05-08 | 2010-01-27 | 九江财兴卫浴实业有限公司 | Hydraulic expansion machine |
| EP2511563A4 (en) * | 2009-12-11 | 2017-12-13 | KYB Corporation | Shock-absorbing device |
| CN102588484A (en) * | 2011-01-05 | 2012-07-18 | 上海市南洋模范中学 | Actuator cylinder for assisting in landing |
| CN202571278U (en) * | 2012-04-12 | 2012-12-05 | 南通市腾达锻压机床厂 | Hydraulic system with independent-loop pressurization of magnetic-material wet forming hydraulic machine |
| JP2015041555A (en) * | 2013-08-23 | 2015-03-02 | 株式会社日立製作所 | Fluid pressure driving device for circuit breaker |
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Effective date of registration: 20190428 Address after: 266300 Taiwan Industrial Park, Jiaodong Street Office, Qingdao City, Shandong Province Applicant after: Qingdao Minghui Precision Forging Equipment Co., Ltd. Address before: 300000 Negative Floor B111 of Binhu Building, Huanhu Middle Road, Hexi District, Tianjin Applicant before: Tianjin Jie Jie Technology Co., Ltd. |
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