CN106734460B - Electrichydraulic control press with hydraulically-damped control mechanism - Google Patents
Electrichydraulic control press with hydraulically-damped control mechanism Download PDFInfo
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- CN106734460B CN106734460B CN201611035938.2A CN201611035938A CN106734460B CN 106734460 B CN106734460 B CN 106734460B CN 201611035938 A CN201611035938 A CN 201611035938A CN 106734460 B CN106734460 B CN 106734460B
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- fluid pressure
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- pressure line
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Classifications
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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
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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
- F15B1/00—Installations or systems with accumulators; Supply reservoir or sump assemblies
- F15B1/02—Installations or systems with accumulators
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F15—FLUID-PRESSURE ACTUATORS; HYDRAULICS OR PNEUMATICS IN GENERAL
- F15B—SYSTEMS ACTING BY MEANS OF FLUIDS IN GENERAL; FLUID-PRESSURE ACTUATORS, e.g. SERVOMOTORS; DETAILS OF FLUID-PRESSURE SYSTEMS, NOT OTHERWISE PROVIDED FOR
- F15B13/00—Details of servomotor systems ; Valves for servomotor systems
- F15B13/02—Fluid distribution or supply devices characterised by their adaptation to the control of servomotors
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F15—FLUID-PRESSURE ACTUATORS; HYDRAULICS OR PNEUMATICS IN GENERAL
- F15B—SYSTEMS ACTING BY MEANS OF FLUIDS IN GENERAL; FLUID-PRESSURE ACTUATORS, e.g. SERVOMOTORS; DETAILS OF FLUID-PRESSURE SYSTEMS, NOT OTHERWISE PROVIDED FOR
- F15B21/00—Common features of fluid actuator systems; Fluid-pressure actuator systems or details thereof, not covered by any other group of this subclass
- F15B21/08—Servomotor systems incorporating electrically operated control means
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Physics & Mathematics (AREA)
- Fluid Mechanics (AREA)
- General Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Analytical Chemistry (AREA)
- Control Of Presses (AREA)
Abstract
The invention discloses a kind of electrichydraulic control press with hydraulically-damped control mechanism, 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；Hydraulically-damped control mechanism.The booster body of hydraulic control and hydraulically-damped 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 with hydraulically-damped control mechanism
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 with hydraulically-damped control mechanism.
In order to solve the above technical problems, the technical solution adopted by the present invention is that:
A kind of electrichydraulic control press with hydraulically-damped control mechanism is used for stamped workpieces, including executing agency
And pressure is provided for the executing agency and controls the hydraulic control of 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 that fill in, is arranged in the larger-diameter section of the variable diameter plunger shaft is 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
Variable diameter plunger shaft is divided into path chamber, major diameter chamber and middle part chamber with the second piston, the first connecting rod and
The second connecting rod is located in the middle part chamber, and the third fluid pressure line leads to the major diameter chamber, the path chamber
It is connected to by the second connecting pipeline with the right chamber；
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；
Hydraulically-damped control mechanism comprising be fixed on the buffering cylinder body of the end of the first connecting rod, be fixed on it is described
The damper piston in the buffering cylinder body is simultaneously protruded into 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 to by throttle valve with accumulator, and the middle part chamber is connected to the accumulator, and the highest of the accumulator limits pressure
Power is less than the pressure of second fluid pressure line.
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, it is described that there is fluid power
The electrichydraulic control press of buffer control mechanism further includes trigger mechanism, and the trigger mechanism includes changing with the Mechanical Driven
It is connected to the spool of valve and the mandril stretched out towards the punch rod direction and the first protruding portion for being arranged in the punch rod,
First protruding portion extends the distance of third trip section in the direction of feed of the punch rod, when the punch rod is from the
When two trip segments are fed to third trip section, first protruding portion pushes against the mandril so that the mandril drives the machinery
The spool of driving reversal valve switches to first position from the second position.
Preferably, the electrichydraulic control press with hydraulically-damped control mechanism further includes trigger switch and institute
The third control unit and the 4th control unit of trigger switch electrical connection are stated, is additionally provided on the execution piston and stretches out the right side
The backhaul control-rod of chamber is provided with the second protruding portion for triggering the trigger switch on the backhaul control-rod, described
Third control unit is arranged on first connecting pipeline, and the third control unit, which has, leads first connecting pipeline
Logical first state and make the second state that first connecting pipeline disconnects and that the right chamber is connected with fuel tank, institute
State the 4th control unit be arranged on first control piper, the 4th control unit have make first control piper
The first state of conducting and the second state for disconnecting first control piper, when the punch rod completes third trip section
When, second protruding portion triggers the trigger switch so that the third control unit switches to the second shape by its first state
State makes the 4th control unit switch to the second state by first state；First fluid pressure line passes through third connecting pipe
Road is connected to 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 the electrichydraulic control press with hydraulically-damped control mechanism of the invention
Fruit is: the booster body of hydraulic control and hydraulically-damped control mechanism cooperate so that punch rod enter third trip section with
When making workpiece that elastic-plastic deformation occur, pressure is constantly increased, and gradually increases in elastic-plastic deformation to pressure to meet workpiece
Requirement, since hydraulic control of the invention makes punch rod meet the variation of three trip segment pressure, to make punching press
Workpiece stiffness out is preferable, and the scrappage of stamped workpieces is lower.
The opening size of the throttle valve can control first piston and second piston is in the time of differential state, also control
The displacement that first piston and second piston are advanced when being in differential state, when being reacted to punch rod, that is, throttle valve can be controlled
Punch rod unit displacement (feeding displacement) processed can also control the punch rod unit time to workpiece pressure to the increment rate of workpiece pressure
The increment rate of power.So as to control workpiece in the increase change rate of the requirement pressure in elastic-plastic deformation stage, so that punching press is not
With the workpiece of material and size, it is allowed to form.
Hydraulic control in electrichydraulic control press with hydraulically-damped control mechanism of the invention relative to
Hydraulic control in the prior art, can more meet the actual requirement of workpiece deformation, and the workpiece of punching press is better than using existing
The workpiece that the hydraulic control of technology stamps out.
Detailed description of the invention
Fig. 1 is the structural schematic diagram of the electrichydraulic control press with hydraulically-damped control mechanism 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-
Two connecting rods；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- buffer chamber；27- buffer spring；The first protruding portion of 28-；The top 29-
Bar；30- first connecting rod；The second protruding portion of 31-；32- trigger switch；33- fuel tank；34- throttle valve；35- damper piston；36- stores
It can device.
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 the electrichydraulic control press with hydraulically-damped control mechanism of the invention, introduces be stamped first
Several trip segments of the punch rod 22 (or pressure head) of the process of workpiece Pressing Deformation and stamped workpieces in entire punching course
So as to deeply understand technical solution of the present invention and friendship 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, colleague of the punch rod 22 in 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 with hydraulically-damped control mechanism of power
As shown in Figure 1, embodiment of the invention discloses a kind of electrichydraulic control pressure with hydraulically-damped control mechanism
Machinery is used for stamped workpieces, including executing agency and provides pressure for executing agency and control the hydraulic control of executing agency
Mechanism；Wherein: executing agency includes executing cylinder body 20, setting to divide in execution cylinder body 20 and by execution cylinder body 20 for left chamber 24
The rushing for stamped workpieces for connecting with the execution piston 21 of right chamber 25 and with execution piston 21 and being stretched out from left chamber 24
Compression bar 22, punch rod 22, which has, is fed to the first stroke section contacted with workpiece, by the of workpiece punching press to initial deformation state
Two trip segments and by the stamping forming third trip section of workpiece；Hydraulic control includes: the first, second and third fluid pressure line, and three
Person connect with hydraulic system；Pressure reducing valve 6 is arranged on the first fluid pressure line 1；First control unit 10, according to punching press
The trip segment of bar 22 controls the on-off of the first fluid pressure line 1 and the second fluid pressure line 2 and right chamber 25, so that when punch rod 22 exists
When first stroke section is fed, the first fluid pressure line 1 is connected to by the first connecting pipeline 4 with right chamber 25, when punch rod 22 is from the
When one stroke section is fed to second stroke section, the second fluid pressure line 2 is connected to by the first connecting pipeline 4 with right chamber 25；Pressurization
Mechanism comprising variable diameter plunger shaft, the first piston 14 being arranged in the diameter segment of variable diameter plunger shaft, setting are living in variable diameter
The second piston 15 in the larger-diameter section of chamber is filled in, the first connecting rod 30 stated on first piston 14 is fixed on and is fixed on the
The second connecting rod 16 being oppositely arranged on two pistons 15 and with first connecting rod 30, wherein first piston 14 and second piston 15 will become
Diameter plunger shaft is divided into path chamber 17, major diameter chamber 18 and middle part chamber 19, and first connecting rod 30 and second connecting rod 16 are located at
In middle part chamber 19, third fluid pressure line 3 leads to major diameter chamber 18, and path chamber 17 passes through the second connecting pipeline 5 and right chamber
25 connections；Second control unit 11 is arranged on third fluid pressure line 3, and the second control unit 11 is according to the row of punch rod 22
Journey section controls the on-off of third fluid pressure line 3, so that when punch rod 22 is fed to third trip section from second stroke section, third
Fluid pressure line 3 is connected；Hydraulically-damped control mechanism comprising be fixed on the buffering cylinder body of the end of first connecting rod 30, be fixed on
The damper piston 35 in buffering cylinder body is simultaneously protruded into the end of second connecting rod 16, wherein damper piston 35 and buffering cylinder body surround one
Buffer chamber 26 is provided with for the buffer spring 27 against damper piston 35 in buffer chamber 26, and buffer chamber 26 passes through section
Stream valve 34 is connected to accumulator 36, and middle part chamber 19 is connected to accumulator 36, and the highest of accumulator 36 limits pressure less than second
The pressure of pipeline.
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 with hydraulically-damped control mechanism further includes trigger mechanism, and trigger mechanism includes changing with Mechanical Driven
It is connected to the spool of valve and the mandril 29 stretched out towards 22 direction of punch rod and the first protruding portion 28 for being arranged in punch rod 22,
First protruding portion 28 extends the distance of third trip section in the direction of feed of punch rod 22, to work as punch rod 22 from second stroke
When section is fed to third trip section, the first protruding portion 28 pushes against mandril 29 so that mandril 29 drives the spool of Mechanical Driven reversal valve
First position is switched to from the second position.
In a preferred embodiment of the invention, the electrichydraulic control press with hydraulically-damped control mechanism also wraps
Trigger switch 32, the third control unit being electrically connected with trigger switch 32 12 and the 4th control unit 13 are included, is also set up on piston
There is the backhaul control-rod 23 for stretching out right chamber 25, second for triggering trigger switch 32 is provided on backhaul control-rod 23 and is protruded
Portion 31, third control unit 12 are arranged on the first connecting pipeline 4, and third control unit 12, which has, leads the first connecting pipeline 4
Logical first state and make the second state that the first connecting pipeline 4 disconnects and that right chamber 25 and fuel tank 33 is connected, the 4th
Control unit 13 is arranged on the first control piper 7, and the 4th control unit 13 has the first shape that the first control piper 7 is connected
State and the second state for disconnecting the first control piper 7, when punch rod 22 completes third trip section, the touching of the second protruding portion 31
Trigger switch 32 is sent out so that third control unit 12 switches to the second state by its first state, makes the 4th control unit 13 by the
One state switches to the second state；First fluid pressure line 1 is connected to by third connecting pipe 9 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, be described below it is of the invention have it is hydraulically-damped
The electrichydraulic control press course of work of control mechanism.
Before introducing the electrichydraulic control press course of work with hydraulically-damped control mechanism, introduce first
The pressurization principle and fluid power of booster body in electrichydraulic control press with hydraulically-damped control mechanism of the invention
The working principle of buffer control mechanism, to better understand the electrichydraulic control press course of work of the invention.
If first piston 14 and the second piston 15 only stress balance by the thrust of hydraulic oil, and 14 He of first piston
The rigid connection of both second pistons 15, i.e., first piston 14 is connected with second piston 15 by a connecting rod, 14 He of first piston
Second piston 15 moves synchronously always, and the hydraulic oil in path chamber 17 should be equal to major diameter chamber to the thrust of first piston 14
Hydraulic oil in 18 is to the thrust of second piston 15, i.e. (wherein, P1 is the pressure of the hydraulic oil in path chamber 17 to P1S1=P2S2
Power, P2 are the pressure of the hydraulic oil in major diameter chamber 18, and S1 is the area of section of first piston 14；S2 is cutting for second piston 15
Face area), since the area of section S2 of second piston 15 is greater than the area of section S1 of first piston 14, to make path chamber 17
The pressure P1 of interior hydraulic oil is greater than the pressure P2 of the hydraulic oil in major diameter chamber 18, therefore, when hydraulic oil enters booster body
Major diameter chamber 18 after, path chamber 17 convey hydraulic oil pressure be greater than major diameter chamber 18 in hydraulic oil pressure, tool
Body size relation and first piston 14 are related with the area of section of second piston 15 ratio.
Should explain: the pressure change relationship of above-mentioned booster body be built upon two-piston only by hydraulic oil thrust simultaneously
And two-piston move synchronously (such as two-piston rigid connection) under the premise of obtain.
Hydraulically-damped control mechanism makes first piston 14 and second piston 15 pass through first connecting rod 30 and second connecting rod 16
Connection, when the major diameter chamber 18 in booster body is not passed through or is passed through the hydraulic oil of lower pressure, and simultaneously accumulator 36 to
The hydraulic oil of certain pressure is provided in buffer chamber 26, so that first connecting rod 30 and second connecting rod 16 be made to keep opposing stationary, is delayed
It rushes spring 27 and is in lesser compressive state, at this point, major diameter chamber 18, path chamber 17, hydraulic oil in middle part chamber 19
Pressure and buffer spring 27 make at first piston 14 and second piston 15 thrust of first connecting rod 30 and second connecting rod 16
In static and equilibrium state, first piston 14 and second piston 15 are regarded as generally in equilibrium state.When logical to major diameter chamber 18
Hydraulic oil pushing and pressing second when the higher hydraulic oil of relative pressure (pressure provided greater than accumulator 36) is provided, in major diameter chamber 18
For piston 15 to make balance break, second piston 15 drives damper piston 35 mobile towards first piston 14 under the action of thrust,
The movement of simultaneous buffering piston 35 make the hydraulic oil in buffer chamber 26 constantly pass through throttle valve 34 to accumulator 36 punching fill can, delay
Spring 27 is rushed constantly to be compressed, in the process, first connecting rod 30 and second connecting rod 16 are mobile towards path chamber 17 always, but the
The movement speed of two connecting rods 16 is greater than first connecting rod 30 to make two connecting rods form differential namely second piston 15 and first and live
Plug 14 forms differential, and to after being compressed completely to buffer spring 27, the first company just moves synchronously namely second with second connecting rod 16
Piston 15 is moved synchronously with first piston 14, and first piston 14 and the stress balance of second piston 15 are established again at this time.According to
The above-mentioned pressurization principle to booster body, when first piston 14 is in equilibrium state with second piston 15, path chamber 17
The pressure P1 of interior hydraulic oil could be greater than the pressure P2 of the hydraulic oil in major diameter chamber 18, in the first of hydraulically-damped control mechanism
When beginning state, smaller pressure in major diameter chamber 18 is Pa, to make the pressure Pb in path chamber 17, when to major diameter chamber
It is Pa ' (Pa ') Pa that pressure is passed through in 18) hydraulic oil when, because provided with hydraulically-damped between first piston 14 and second piston 15
Control mechanism, so that the hydraulic fluid pressure in the path chamber 17 made is corresponding with Pa ' when equilibrium state there is no being increased at once
Pb ', and slowly rise since Pb, until buffer spring 27 is fully compressed, first piston 14 is synchronous with second piston 15
It moves after reaching new balance, the pressure in path chamber 17 just reaches Pb ' from Pb.
It can be seen from the above, booster body and hydraulically-damped control mechanism can make the pressure in path chamber 17 initial from one
The predetermined pressure of pressure rise, to make the pressure in right chamber 25 gradually rise, to keep stamping parts right in third trip section
Workpiece generates constantly raised pressure, to meet the requirement of workpiece elastic-plastic deformation.
As shown in Figure 1, the electrichydraulic control press with hydraulically-damped control mechanism of the invention is used for presser
The executive component of part is punch rod 22, and hydraulic control is used to provide power for punch rod 22 and make stamping parts in above three
Corresponding pressure is applied to workpiece in trip segment, and is 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 be simultaneously
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 (as
First control unit 10) spool switch to the second position from first position, the first fluid pressure line 1 (is made by hydraulic directional valve
For first control unit 10) it closes, the second fluid pressure line 2 begins through hydraulic directional valve (as first control unit 10) entrance
First connecting pipeline 4, and right chamber 25 is entered by the first connecting pipeline 4, due to being not provided with decompression on the second fluid pressure line 2
Valve 6, the pressure in the second fluid pressure line 2 are greater than the pressure in the first fluid pressure line 1, and the pressure of the hydraulic oil in right chamber 25
Equal to the pressure in the second fluid pressure line 2, also, the pressure of second fluid pressure line 2 is arranged to make the hydraulic oil of the pressure
Pushing and pressing execute piston 21, so that punch rod 22 is met the flexible deformation that original state occurs for workpiece to the pressure of workpiece, thus punching press
Bar 22 makes workpiece that the flexible deformation of original state occur when second stroke section is fed, to complete second stroke section, workpiece is complete
At the flexible deformation of original 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, can according to the above-mentioned buffering course of the above-mentioned pressurization of booster body and hydraulically-damped control mechanism
Know, when the spool of Mechanical Driven reversal valve (as the second control unit 11) is in the second position, i.e., punch rod 22 also in
It is since right chamber 25 is connected to by the second connecting pipeline 5 with path chamber 17, then hydraulic in right chamber 25 when second stroke section
The pressure of oil is equal to the pressure of the hydraulic oil in path chamber 17, which can make 22 stamped workpieces of punch rod make workpiece
Flexible deformation, therefore, when punch rod 22 just starts to be fed to third trip section, the pressure in path chamber 17 is equal to punch rod
22 in second stroke section hydraulic oil pressure, when the spool of Mechanical Driven reversal valve (as the second control unit 11) is from second
After position switches to first position, (pressure of the hydraulic oil is higher than being provided for accumulator 36 to the hydraulic oil of third fluid pressure line 3
Pressure, namely greater than the pressure of the hydraulic oil in buffer chamber 26, and the pressure for the hydraulic oil being equal in path chamber 17) into
Enter in major diameter chamber 18, the hydraulic oil in the major diameter chamber 18 pushes against second piston 15 towards the movement of first piston 14, damper piston
35 make the hydraulic oil in buffer chamber 26 enter accumulator 36 by throttle valve 34 under the driving of second piston 15, and press simultaneously
Contracting buffer spring 27, in the process, first piston 14 and second piston 15 are mobile towards path chamber 17, only second piston
15 movement speed is greater than the movement speed of first piston 14, thus formed it is differential, at this point, with first piston 14 and second living
The pressure of the continuous movement of plug 15, the hydraulic oil in path chamber 17 gradually rises, thus make punch rod 22 in third trip section,
The pressure of workpiece is constantly increased, after buffer spring 27 is fully compressed, first piston 14 starts synchronous with second piston 15
Movement, 15 stress balance of first piston 14 and second piston, so that the pressure of the hydraulic oil in path chamber 17 reaches most
Greatly, to make punch rod 22 reach maximum to the pressure of workpiece, punch rod 22 makes 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: the booster body of hydraulic control and hydraulically-damped control mechanism cooperate so that rushing
When entering third trip section so that elastic-plastic deformation occurs for workpiece, pressure constantly increases compression bar 22, to meet workpiece in bullet
The requirement that pressure is gradually increased when plastic deformation, since hydraulic control of the invention makes punch rod 22 meet three rows
The variation of journey section pressure, to keep the workpiece stiffness stamped out preferable, and the scrappage of stamped workpieces is lower.
It should illustrate: in hydraulically-damped control mechanism, it should make the area of section and first piston 14 of second piston 15
The ratio between area of section be equal to pressure and workpiece of the workpiece needed for the elastic deformation stage maximum required in elastic-plastic deformation
The ratio between pressure, that is to say, that can be according to pressure of the workpiece needed for elastic deformation stage and workpiece in elastic-plastic deformation when institute
The maximum pressure needed designs the area of section of two-piston.
Hydraulically-damped control mechanism control punch rod 22 is setting to a key factor of the rate of pressure rise of workpiece
Throttle valve 34, the opening size of the throttle valve 34 can control first piston 14 and second piston 15 be in differential state when
Between, the displacement that first piston 14 and second piston 15 are advanced when being in differential state is also controlled, when being reacted to punch rod 22,
That is, throttle valve 34 can control 22 unit displacement of punch rod (feeding displacement) to the increment rate of workpiece pressure, punching can be also controlled
Increment rate of 22 unit time of compression bar to workpiece pressure.So as to control workpiece in the requirement pressure in elastic-plastic deformation stage
Increase change rate, so that the workpiece of punching press different materials and size, is allowed to form.
The present invention has the hydraulic control in the electrichydraulic control press of hydraulically-damped control mechanism relative to existing
There is the hydraulic control in technology, can more meet the actual requirement of workpiece deformation, the workpiece of punching press is better than utilizing existing skill
The workpiece that the hydraulic control of art stamps out.
Above embodiments are only exemplary embodiment of the present invention, are not used in the limitation present invention, protection scope of the present invention
It is defined by the claims.Those skilled in the art can within the spirit and scope of the present invention make respectively the present invention
Kind modification or equivalent replacement, this modification or equivalent replacement also should be regarded as being within the scope of the present invention.
Claims (5)
1. a kind of electrichydraulic control press with hydraulically-damped control mechanism is used for stamped workpieces, which is characterized in that including
Executing agency and pressure is provided for the executing agency 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
The second piston in the larger-diameter section of the variable diameter plunger shaft is set, the first connecting rod stated on first piston is fixed on and consolidates
The second connecting rod for being scheduled in the second piston and being oppositely arranged with the first connecting rod, wherein the first piston and described
Variable diameter plunger shaft is divided into path chamber, major diameter chamber and middle part chamber, the first connecting rod and described by second piston
Two connecting rods are located in the middle part chamber, and the third fluid pressure line leads to the major diameter chamber, and the path chamber passes through the
Two connecting pipelines are connected to the right chamber；
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 be fixed on the buffering cylinder body of the end of the first connecting rod, be fixed on described second
The damper piston in the buffering cylinder body is simultaneously protruded into 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 logical
It crosses throttle valve to be connected to accumulator, the middle part chamber is connected to the accumulator, and it is small that the highest of the accumulator limits pressure
In the pressure of second fluid pressure line.
2. the electrichydraulic control press according to claim 1 with hydraulically-damped control mechanism, which is characterized in that institute
Stating first control unit is hydraulic directional valve, and the spool of the hydraulic directional valve, which has, makes first fluid pressure line by first
Connecting pipeline be connected to the right chamber and the first position that simultaneously disconnects second fluid pressure line and the right chamber with
And second fluid pressure line is made to be connected to the right chamber by the first connecting pipeline and make first fluid pressure line simultaneously
The second position disconnected with the right chamber；The spool of the hydraulic directional valve passes through first be connected to respectively with the left chamber
The control of control piper and the second control piper being connected to the right chamber switches between the first position and the second position, with
Make when the punch rod is fed to second stroke section from first stroke section, the spool of the hydraulic directional valve is cut by first position
Shift to the second position.
3. the electrichydraulic control press according to claim 1 with hydraulically-damped control mechanism, which is characterized in that institute
Stating the second control unit is Mechanical Driven reversal valve, and the spool of the Mechanical Driven reversal valve, which has, is connected third fluid pressure line
First position and the second position that disconnects the third fluid pressure line, it is described electro-hydraulic with hydraulically-damped control mechanism
Controlling press further includes trigger mechanism, and the trigger mechanism includes that simultaneously court is connect with the spool of the Mechanical Driven reversal valve
The mandril that the punch rod direction is stretched out and the first protruding portion being arranged in the punch rod, first protruding portion is in institute
The distance for extending third trip section in the direction of feed of punch rod is stated, to be fed to third from second stroke section when the punch rod
When trip segment, first protruding portion push against the mandril so that the mandril drive the spool of the Mechanical Driven reversal valve from
The second position switches to first position.
4. the electrichydraulic control press according to claim 2 with hydraulically-damped control mechanism, which is characterized in that institute
The electrichydraulic control press with hydraulically-damped control mechanism is stated to further include trigger switch, be electrically connected with the trigger switch
Third 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,
The second protruding portion for triggering the trigger switch is provided on the backhaul control-rod, the third control unit setting exists
On first connecting pipeline, the third control unit has the first state for making the first connecting pipeline conducting and makes
It is that first connecting pipeline disconnects and the second state that the right chamber is connected with fuel tank, the 4th control unit are arranged
On first control piper, the 4th control unit have the first state for making first control piper conducting and
The second state for disconnecting first control piper, when the punch rod completes third trip section, second protruding portion
The trigger switch is triggered so that the third control unit switches to the second state by its first state, makes the 4th control
Unit switches to the second state by first state；First fluid pressure line is connected by third connecting pipe and the left chamber
It is logical.
5. the electrichydraulic control press according to claim 4 with hydraulically-damped control mechanism, which is characterized in that institute
Stating third control unit and the 4th control unit is solenoid directional control valve.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201611035938.2A CN106734460B (en) | 2016-11-22 | 2016-11-22 | Electrichydraulic control press with hydraulically-damped control mechanism |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201611035938.2A CN106734460B (en) | 2016-11-22 | 2016-11-22 | Electrichydraulic control press with hydraulically-damped control mechanism |
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| CN106734460A CN106734460A (en) | 2017-05-31 |
| CN106734460B true CN106734460B (en) | 2019-05-10 |
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| CN201611035938.2A Expired - Fee Related CN106734460B (en) | 2016-11-22 | 2016-11-22 | Electrichydraulic control press with hydraulically-damped control mechanism |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN109421312A (en) * | 2017-08-24 | 2019-03-05 | 连杰油压工业股份有限公司 | Energy-conserving hydraulic former |
| CN108543903B (en) * | 2018-04-16 | 2019-03-29 | 西安科技大学 | Energy recoverable large operation machine tong holder buffers dynamical system and its design method |
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| CN2031859U (en) * | 1988-05-14 | 1989-02-01 | 郝雄义 | Hydraulic system eliminated hydraulic impaction |
| KR0153515B1 (en) * | 1987-12-04 | 1998-11-16 | 아마다 미쯔아끼 | Method and device for controlling the stroke of a press machine |
| CN202006243U (en) * | 2011-01-05 | 2011-10-12 | 亿和精密工业（苏州）有限公司 | Stamping riveting jig device |
| CN204817637U (en) * | 2015-08-07 | 2015-12-02 | 河北晶龙阳光设备有限公司 | Be used for photovoltaic module aluminium frame duplex position stamping device |
| CN105952698A (en) * | 2016-06-17 | 2016-09-21 | 武汉软件工程职业学院 | Gas-liquid pressurized cylinder |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20100224057A1 (en) * | 2009-03-06 | 2010-09-09 | Mark Andrew Brown | J-ME modular, internally shifting, double acting, linear fluid actuator system |
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2016
- 2016-11-22 CN CN201611035938.2A patent/CN106734460B/en not_active Expired - Fee Related
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR0153515B1 (en) * | 1987-12-04 | 1998-11-16 | 아마다 미쯔아끼 | Method and device for controlling the stroke of a press machine |
| CN2031859U (en) * | 1988-05-14 | 1989-02-01 | 郝雄义 | Hydraulic system eliminated hydraulic impaction |
| CN202006243U (en) * | 2011-01-05 | 2011-10-12 | 亿和精密工业（苏州）有限公司 | Stamping riveting jig device |
| CN204817637U (en) * | 2015-08-07 | 2015-12-02 | 河北晶龙阳光设备有限公司 | Be used for photovoltaic module aluminium frame duplex position stamping device |
| CN105952698A (en) * | 2016-06-17 | 2016-09-21 | 武汉软件工程职业学院 | Gas-liquid pressurized cylinder |
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| CN106734460A (en) | 2017-05-31 |
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Effective date of registration: 20190416 Address after: 211300 brick wall economic Park, Gaochun District, Nanjing, Jiangsu 68 Applicant after: NANJING SHANGBO INTELLIGENT EQUIPMENT Co.,Ltd. Address before: 300000 Negative Floor B111 of Binhu Building, Huanhu Middle Road, Hexi District, Tianjin Applicant before: TIANJIN XIUJIE TECHNOLOGY CO.,LTD. |
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