CN103711739B - Hydraulic control device and press machine with this control device - Google Patents
Hydraulic control device and press machine with this control device Download PDFInfo
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- CN103711739B CN103711739B CN201310596397.0A CN201310596397A CN103711739B CN 103711739 B CN103711739 B CN 103711739B CN 201310596397 A CN201310596397 A CN 201310596397A CN 103711739 B CN103711739 B CN 103711739B
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- 239000007788 liquid Substances 0.000 claims description 5
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- 238000011084 recovery Methods 0.000 claims description 3
- 238000004080 punching Methods 0.000 abstract description 8
- 238000000034 method Methods 0.000 description 12
- 238000001816 cooling Methods 0.000 description 9
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Classifications
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F15—FLUID-PRESSURE ACTUATORS; HYDRAULICS OR PNEUMATICS IN GENERAL
- F15B—SYSTEMS ACTING BY MEANS OF FLUIDS IN GENERAL; FLUID-PRESSURE ACTUATORS, e.g. SERVOMOTORS; DETAILS OF FLUID-PRESSURE SYSTEMS, NOT OTHERWISE PROVIDED FOR
- F15B21/00—Common features of fluid actuator systems; Fluid-pressure actuator systems or details thereof, not covered by any other group of this subclass
- F15B21/14—Energy-recuperation means
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B30—PRESSES
- B30B—PRESSES IN GENERAL
- B30B15/00—Details of, or accessories for, presses; Auxiliary measures in connection with pressing
- B30B15/16—Control arrangements for fluid-driven presses
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F15—FLUID-PRESSURE ACTUATORS; HYDRAULICS OR PNEUMATICS IN GENERAL
- F15B—SYSTEMS ACTING BY MEANS OF FLUIDS IN GENERAL; FLUID-PRESSURE ACTUATORS, e.g. SERVOMOTORS; DETAILS OF FLUID-PRESSURE SYSTEMS, NOT OTHERWISE PROVIDED FOR
- F15B2211/00—Circuits for servomotor systems
- F15B2211/20—Fluid pressure source, e.g. accumulator or variable axial piston pump
- F15B2211/205—Systems with pumps
- F15B2211/20507—Type of prime mover
- F15B2211/20515—Electric motor
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F15—FLUID-PRESSURE ACTUATORS; HYDRAULICS OR PNEUMATICS IN GENERAL
- F15B—SYSTEMS ACTING BY MEANS OF FLUIDS IN GENERAL; FLUID-PRESSURE ACTUATORS, e.g. SERVOMOTORS; DETAILS OF FLUID-PRESSURE SYSTEMS, NOT OTHERWISE PROVIDED FOR
- F15B2211/00—Circuits for servomotor systems
- F15B2211/20—Fluid pressure source, e.g. accumulator or variable axial piston pump
- F15B2211/205—Systems with pumps
- F15B2211/2053—Type of pump
- F15B2211/20546—Type of pump variable capacity
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F15—FLUID-PRESSURE ACTUATORS; HYDRAULICS OR PNEUMATICS IN GENERAL
- F15B—SYSTEMS ACTING BY MEANS OF FLUIDS IN GENERAL; FLUID-PRESSURE ACTUATORS, e.g. SERVOMOTORS; DETAILS OF FLUID-PRESSURE SYSTEMS, NOT OTHERWISE PROVIDED FOR
- F15B2211/00—Circuits for servomotor systems
- F15B2211/20—Fluid pressure source, e.g. accumulator or variable axial piston pump
- F15B2211/205—Systems with pumps
- F15B2211/2053—Type of pump
- F15B2211/20569—Type of pump capable of working as pump and motor
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F15—FLUID-PRESSURE ACTUATORS; HYDRAULICS OR PNEUMATICS IN GENERAL
- F15B—SYSTEMS ACTING BY MEANS OF FLUIDS IN GENERAL; FLUID-PRESSURE ACTUATORS, e.g. SERVOMOTORS; DETAILS OF FLUID-PRESSURE SYSTEMS, NOT OTHERWISE PROVIDED FOR
- F15B2211/00—Circuits for servomotor systems
- F15B2211/20—Fluid pressure source, e.g. accumulator or variable axial piston pump
- F15B2211/205—Systems with pumps
- F15B2211/20576—Systems with pumps with multiple pumps
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F15—FLUID-PRESSURE ACTUATORS; HYDRAULICS OR PNEUMATICS IN GENERAL
- F15B—SYSTEMS ACTING BY MEANS OF FLUIDS IN GENERAL; FLUID-PRESSURE ACTUATORS, e.g. SERVOMOTORS; DETAILS OF FLUID-PRESSURE SYSTEMS, NOT OTHERWISE PROVIDED FOR
- F15B2211/00—Circuits for servomotor systems
- F15B2211/40—Flow control
- F15B2211/46—Control of flow in the return line, i.e. meter-out control
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F15—FLUID-PRESSURE ACTUATORS; HYDRAULICS OR PNEUMATICS IN GENERAL
- F15B—SYSTEMS ACTING BY MEANS OF FLUIDS IN GENERAL; FLUID-PRESSURE ACTUATORS, e.g. SERVOMOTORS; DETAILS OF FLUID-PRESSURE SYSTEMS, NOT OTHERWISE PROVIDED FOR
- F15B2211/00—Circuits for servomotor systems
- F15B2211/60—Circuit components or control therefor
- F15B2211/625—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
- F15B2211/00—Circuits for servomotor systems
- F15B2211/70—Output members, e.g. hydraulic motors or cylinders or control therefor
- F15B2211/705—Output members, e.g. hydraulic motors or cylinders or control therefor characterised by the type of output members or actuators
- F15B2211/7058—Rotary output members
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F15—FLUID-PRESSURE ACTUATORS; HYDRAULICS OR PNEUMATICS IN GENERAL
- F15B—SYSTEMS ACTING BY MEANS OF FLUIDS IN GENERAL; FLUID-PRESSURE ACTUATORS, e.g. SERVOMOTORS; DETAILS OF FLUID-PRESSURE SYSTEMS, NOT OTHERWISE PROVIDED FOR
- F15B2211/00—Circuits for servomotor systems
- F15B2211/80—Other types of control related to particular problems or conditions
- F15B2211/88—Control measures for saving energy
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Chemical & Material Sciences (AREA)
- Analytical Chemistry (AREA)
- Physics & Mathematics (AREA)
- Fluid Mechanics (AREA)
- General Engineering & Computer Science (AREA)
- Fluid-Pressure Circuits (AREA)
- Control Of Presses (AREA)
- Press Drives And Press Lines (AREA)
Abstract
The present invention relates to hydraulic control device and the press machine with this control device.Disclose it is a kind of for press machine, particularly for the hydraulic control device of deep-draw machine, there is working cylinder, workpiece can be especially supported on working cylinder by workseat or deep-draw pad with respect to the power of upper mold.The power that workpiece is acted in punching course is adjusted in such a way that the pressure medium volume flow of the working chamber to working cylinder throttles.In order to recover energy, hydraulic machine is provided in pressure medium flow path in parallel, the controllable deal of pressure medium volume flow flows through hydraulic machine.Furthermore a kind of press machine with this hydraulic control device especially deep-draw machine is also disclosed.
Description
Technical field
The present invention relates to a kind of hydraulic control device and a kind of press machines with this control device.
Background technique
Press machine especially press machine, forming machine or deep-draw machine are that manufacture workpiece has upper die and lower die, can be passed through
Upper die and lower die apply pressure to workpiece.Upper mold is for example wherein driven by eccentric drive mechanism, and upper mold is mostly with preparatory
Determining reciprocal rate and speed execute periodic lifting movement.Lower die has die holder, if deep-draw machine, then has deep-draw pad,
Workpiece is laid on die holder in other words on deep-draw pad.Wherein supported by the opposite pressure applied by upper mold of working cylinder die holder or
Person says deep-draw pad.Wherein, in order to guarantee workpiece quality, there is very high power to adjust the support force of working cylinder and require.To a side
Power described in face must satisfy required nominal curve, and on the other hand the nominal curve, which must have, sufficiently achieves the high-precision of workpiece quality
Degree.It is also required that realize biggish reciprocal rate biggish press machine yield in other words, to occur for workpiece
Cost is kept as less.
In order to be applied to the power of workpiece with required precision and dynamic property control, traditional press machine is in other words
Its hydraulic control device all has the pressure extended from the working chamber of working cylinder acted on support direction towards pressure medium sink
Power media flow path.It is mostly wherein that regulating valve is arranged in pressure Jie by highly dynamicization and persistently adjustable throttling set
Among matter flow path.During pressure processing, control by the preaceleration in piston and in the opposite fixed stage from working chamber
To the drainage volume flow of pressure medium sink, can accurate and mobilism adjustment effect in the power of workpiece.
The disadvantages of this solution is there is very big hydraulic energy via the pressure medium that throttling set flows to pressure medium sink
Loss.To which the hydraulic energy at throttling set can be converted into almost useless heat.Diametical to be: it is necessary to section
It flows device and is cooled down again via the pressure medium that throttling set flows out, additional energy must be provided thus.It is this in a word
Efficiency of the press machine in other words in terms of the energy of control device is proved to be very low.
In order to which optimization pressure machine and control device, the prior art give solution in terms of energy, for work
Further comprise other than pressure medium is supplied with high pressure in addition to traditional for the movement of the piston of cylinder and carries out second with low pressure
Pressure medium supply.Wherein especially by the pressure medium of the high pressure be used for piston from its resting position towards upper mold
Preaceleration in the direction of motion.The pressure medium of lower pressure is then employed for the Remaining Stages of punching course.Relative to
Discribed situation before reduces the energy consumption of press machine or hydraulic control device by means of which.
But still unfortunately, the pressure medium amount squeezed out from working chamber is depressurized to storage tank only by throttling set
Pressure, this is unfavorable in terms of energy.
Summary of the invention
In contrast, the object of the present invention is to provide a kind of hydraulic control device for press machine and a kind of tools
There is the press machine of this control device, there is improved efficiency.
Hydraulic control for press machine especially as the press machine that press machine or forming machine or deep-draw mechanism are made fills
It sets with working cylinder, the working cylinder has at least one working chamber, and working chamber can be processed in a press by piston limit
Workpiece towards press machine upper mold indirectly or be supported directly on piston.Wherein the throttling that can especially continue adjustment is filled
Preferred regulating valve is set to be arranged among the first pressure media flow paths of control device, it can be by the flow path by work
Chamber is connected with pressure medium sink (Druckmittelsenke).It can be adjusted in valve regulation working chamber in other words by throttling set
Pressure, and thereby the especially adjustable power for acting on workpiece.According to of the present invention, by hydraulic machine be arranged in especially with
To be used for pressure recovery function among the parallel second pressure media flow paths of the first pressure media flow paths of control device
Working chamber can be extraly connected with pressure medium sink by punching press energy in other words by the second pressure media flow paths.
When especially sliding block acts on workpiece to the upper mold of press machine, then especially in pair of process especially deep-draw process
It just may require that piston as scheduled time changing curve with certain power obtains opposite holding into the holding stage.Can wherein it lead to
It crosses relationship " pressure in working chamber " x " piston area " and obtains the power.Adjustable parameter is preferably the pressure in working chamber.Its
In the adjusting is usually carried out by throttling set, which can satisfy that very high pressure is adjusted and thereby power adjusts
The requirement of dynamic, because extremely short regulating time can be realized by it.It can to the processing of workpiece using the dynamic
Active influence is carried out by property and quality.Wherein can according to time and/or upper mold position by from working chamber drainage or
The influent stream of person towards working chamber carries out corresponding strong or weak throttling to adjust the pressure in working chamber.It is preferred that passing through control unit
Meet regulatory function, be suitable for thus using rated pressure curve especially relevant to workpiece or process as upper mold when
Between or position function save in a control unit.As previously mentioned, just being had if pressure medium is flowed out via throttling set merely
A large amount of hydraulic energies are lost and are changed into heat.In addition there are one the disadvantage is that this heat must be discharged, this is required
The appropriately sized cooling equipment with corresponding cooling power.
The hydraulic machine of the present invention being arranged in second pressure media flow paths is set herein: in the feelings using it
Advantage is very high adjusting dynamic property can be realized by throttling set, while can recover energy by hydraulic machine under condition.
Due to also can be by piston by the pressure in working chamber especially in preaceleration stage and opposite holding stage when carrying out punching press
Medium is discharged and is squeezed among second pressure media flow paths of the present invention, so the hydraulic machine being disposed therein
It will rotate in a motoring mode, to provide torque and revolving speed, that is, mechanical output on its output shaft.It thus can be with
Punching press energy pressure function in other words is intercepted on output shaft, and accordingly reduces cooling power required on throttling set, from
And improve the efficiency of control device press machine in other words.It is preferred that passing through second pressure media flow paths hydraulic machine in other words
The most of pressure medium squeezed out from working chamber of discharge, such as discharge 60 to 95%, particularly preferably discharge 80 to 90%.Pass through
One pressure medium flow path and its throttling set are discharged corresponding remainder, such as 5 to 40%, particularly preferably 10 to
20%.The volume flow in the two pressure medium flow paths is set advantageously by the control unit and its control device of hydraulic machine
Amount ratio.The particularly suitable lift volume that hydraulic machine is controlled according to time and/or upper mold position thus, on condition that, hydraulic machine
Tool is preferably with the design of adjustable lift volume.Alternatively hydraulic machine can certainly be designed as constant.Carrying out this
While kind control, come really by the way of throttling to the remainder being discharged via first pressure media flow paths
Adjust pressure.Since the remainder is less than the whole medium volume flows squeezed out from working chamber, can adjust
The unlatching section of throttling set is set to smaller compared in the conventional control device in not hydraulic machine under mode to open
Open section.
Guarantee to realize do not give a discount simultaneously recovering energy by the collective effect of discribed, throttling set and hydraulic machine
The very high dynamic regulation performance and accurate pressure of button adjust power in other words and adjust.Due to must be by cooling equipment to lesser
Pressure medium amount is cooled down again, must provide smaller cooling power in other words, therefore cooling pump can also be designed to compare
It is smaller.Additionally due to mainly determining storage tank size by the parameter of cooling pump, therefore smaller storage tank can also be selected.This two
Independent one in person or it can all cause cooling device can be designed smaller altogether, to reduce control device
Or the structure space demand of the press machine with this control device.Shown that cooling pump can reduce about 50%, therefore
Storage tank also can reduce about 50%.
It additionally can use second pressure media flow paths and simply realize overload protection.
In addition to this, compared with prior art, not discounted big work may be implemented in control device of the present invention
Fill in speed, piston force, reciprocal time, dynamic property, and not discounted big piston stroke.Furthermore piston position is further improved
Set the degree of regulation with piston force.
Working cylinder is suitable for the workload from about 75 t to 190 t.Tool can also be advantageously used different from this
There is the control device of the working cylinder of smaller or larger workload.
It is horizontal that pressure medium sink can have the different pressures formed particularly by multiple storage tanks, but also can have only
One stress level.Pressure medium sink is formed advantageously by only one storage tank in the latter case.
Advantageously by workseat or by deep-draw pad by workpiece support on piston.Hydraulic control device is suitable for being used in deeply
Among pressure machine.
In a kind of advantageous embodiment embodiment, hydraulic machine passes through drive shaft, particularly by output shaft and power conversion
Device, which can couple, especially to be coupled.Wherein the power inverter is suitably a motor, is so designed, so that it can be with
At least work in the generator mode.
It is preferred that motor can be connected with power grid or be connected with power grid, to power grid feed.Additionally it is particularly suitable such as
This design motor, to make it that can also work in a motoring mode, so that hydraulic machine or control dress can be driven by it
It sets or other equipment of press machine, such as cooler or Hydraulic pump.As an alternative, power inverter can also be a kind of
Another hydraulic machine can especially be coupled by drive shaft, especially coupling and can at least working in a pumping mode
Tool.For the same reason, the hydraulic machine is it is also preferred that be designed in this way, so that it is furthermore possible to work in a motoring mode.
In a kind of particularly advantageous improvement embodiment, control device has valve, can be by second pressure by the valve
Media flow paths cut-off.It on the one hand can stop the pressure medium volume flow via hydraulic machine to pressure medium sink in this way,
Furthermore it can also be reclosed with very high dynamic property.It is suitable for arranging the valve in second pressure media flow paths
Between working chamber and the first hydraulic machine or it is arranged between hydraulic machine and pressure medium sink.The valve is particularly suitable for being 2/
2 direction valves, the rest position with spring pre-tightening for ending, and with steerable for triggering second pressure to be situated between
The conduction position of matter flow path.
If control device have circulate path, by this circulate path by hydraulic machine can at least
The connected pressure medium interface of one working chamber and the pressure medium interface phase that can be connected with pressure medium sink of hydraulic machine
Another advantage of even, will generate.Control device is made to be cyclic module in terms of device technique by this path that circulates
Formula is ready, and should not be recovered energy or can not be recovered energy in circulation pattern.Under circulation pattern, hydraulic machine is suitable
It preferably works in a pumping mode, and makes pressure medium via circulating path with scheduled lift volume cycle.If existing
It recovers energy hydraulic machine should be begun through from circulation pattern, then it is not necessary that hydraulic machine accelerates since revolving speed=0, and
And hydraulic machine already has scheduled lift volume, is a weight compared with this hydraulic machine with rotation speed change driven
The advantages of wanting.Path can be circulated in other words by circulation pattern thus to minimize or eliminate the used of hydraulic machine
Property effect, this is conducive to pressure controlled dynamic property.The particularly suitable path that will circulate is used to the second pressure together with valve
The cut-off of power media flow path.
A kind of particularly suitable improvement embodiment has a check-valves in circulating path, and the check-valves is towards fluid power
The mechanical pressure medium interface that can be connected at least one working chamber is opened.It is wherein suitable for being used to check-valves together with valve
Second pressure media flow paths are ended.
If working cylinder is designed to double action, and passes through the another of piston pair and at least one working chamber acting in opposition
A working chamber limit, will generate particularly compact control device in terms of device technique.Be suitable for working cylinder is designed to it is differential
Cylinder, wherein another described working chamber is preferably run through by piston rod, workpiece can be indirect or be directly obtained via the piston rod
Support.Other than opposite fixation and uplink-of the function-piston of at least one working chamber towards upper mold, using described another
One working chamber can also additionally realize the decline function of piston by working cylinder.On the one hand the decline is a kind of safety again
Relevant function carries out on separated direction because it is connected in the effect of piston and upper mold.On the other hand it can will decline function
The pre-add speed of piston and thereby workpiece can be used to improve, so as to improve workpiece quality, reciprocal time and thereby yield.
The particularly advantageous improvement embodiment of one kind of control device has at least one fluid power reservoir, can by itself and
Working chamber is connected, that is to say, that and at least one working chamber and/or and be connected with another working chamber of its acting in opposition.
Thus corresponding working chamber supply pressure medium can be given in a manner of very dynamic by fluid power reservoir.
It is suitable for that at least one safety valve especially security logic valve (Si-Logikventil) is arranged in pressure medium flow
Among path, fluid power reservoir can be connected by the pressure medium flow path at least one working chamber, pass through the peace
Full logical valve can prevent the pressure medium by fluid power reservoir to be surprisingly applied to working chamber, so that piston be prevented surprisingly to be driven out to.It is special
Two safety valve series windings Shi Yi be arranged in the pressure medium flow path, can further improve safety in this way.
A kind of particularly suitable improvement embodiment has another fluid power reservoir, which equally can be with
Working chamber is connected, that is to say, that is connected at least one working chamber and/or with another described working chamber, and the fluid power
Reservoir has stress level more lower than at least one described fluid power reservoir.Very high piston force and/or speed are not being needed
Stage, can by the lower fluid power reservoir of stress level by the lower pressure medium of pressure be applied to working chamber and/or
Another working chamber described in person, this in terms of energy advantageously.
A kind of particularly advantageous improvement embodiment has fluid power can coupling with hydraulic machine, especially being coupled
Pump, to give hydraulic control device and/or press machine supply pressure medium.Wherein advantageously by the output shaft of hydraulic machine and liquid
The drive shaft of power pump carries out the coupling.The two axis can also be simply integrally formed in terms of device technique.By this
Coupling can be hydraulic to be used directly to the energy that can be intercepted on hydraulic machine in a manner of simple in terms of device technique
Control device or press machine supply pressure medium.In this case it can abandon aiming at the electric motor of Hydraulic pump configuration, and
And it can use above-described motor to drive Hydraulic pump.Particularly suitable, the pres-sure medium outlet of Hydraulic pump can be with
This and/or another described fluid power reservoir are connected, so as to give this or these fluid power reservoir by Hydraulic pump
It charges.Alternatively or additionally scheme, can be by the pres-sure medium outlet of Hydraulic pump and the working chamber and/or described another
A working chamber is connected, so as to make piston motion by the delivered volume stream of Hydraulic pump.If this or these fluid power
Reservoir is not charged or can not be charged, then this is with regard to particularly advantageous.
It is suitable for throttling set being designed to to have rest position and at least with the direction valve of drainage adjusting position, it can be with
First medium flow path is ended by rest position, it can be by least one working chamber via by drainage adjusting position
One pressure medium flow path is connected with pressure medium sink.It is suitable for that direction valve is at least designed to 2/2 direction valve.
In a kind of particularly suitable improvement embodiment, it is designed in this way direction valve, so as to pass through direction valve for fluid power
Pump carries out pressure medium connection with this or these working chamber and/or with this or these fluid power reservoir.The party
It is suitably 3/2 direction valve to valve, and there is the adjusting position that becomes a mandarin for pressure medium connection.
It is suitable for that its adjusting position is entered with electromagnetic mode manipulation direction valve.Its rest position is preferably spring pre-tightening.
In a kind of advantageous embodiment embodiment, in order to detect different adjustment and/or control required process variable, control
Device processed have pressure sensing cell and stroke detection unit, can by these detection units detect working chamber in pressure with
And press machine upper mold or piston lift.Wherein the detection unit can suitably with the control unit of control device
Among entering signal connection.
It can be preferably to the medium volume flow of hydraulic machine in other words via second pressure by control unit
The surplus of pressure medium that media flow paths are discharged, being squeezed out by piston from least one working chamber is according to time and/or liter
Journey is controlled.
The lift volume of preferably at least hydraulic machine is adjustable and can be controlled by control unit.It is additionally excellent
Choosing, the lift volume of Hydraulic pump are adjustable and can be controlled by control unit.
The revolving speed of hydraulic machine is suitable for constant.The revolving speed of hydraulic machine, power inverter and Hydraulic pump is preferably identical.
Press machine especially deep-draw machine or press machine or forming machine have at least one side according to part described above
The hydraulic control device described according to the present invention in face.Furthermore it also have with the upper mold of piston adverse effect especially sliding block,
It wherein can be by the collective effect of sliding block and piston to workpiece applied force.Hydraulic machine of the present invention and based on throttling dress
The pressure set adjusts identical as having the advantages that partially already to describe as described above for press machine.
Wherein the particularly suitable improvement embodiment of one kind of press machine be as deep-draw machine, the deep-draw machine have die holder or
Person says the deep-draw pad that can be supported on piston.
Press machine is particularly suitable to have Hydraulic pump described in part described above, wherein the Hydraulic pump directs or through
Power inverter is coupled with hydraulic machine.
Detailed description of the invention
Hereinafter two kinds of the press machine of the present invention with hydraulic control device will be explained in detail by five attached drawings
Embodiment.Wherein:
Attached drawing 1 is the signal of the first embodiment of the press machine by invention with the hydraulic control device by invention
Line map；
Attached drawing 2 is the signal of second of embodiment of the press machine by invention with the hydraulic control device by invention
Line map；
Attached drawing 3 is the detailed line map of the first embodiment shown in Fig. 1；
Attached drawing 4 shows piston lift, working chamber medium volume flow, throttling set and opens section, work cavity pressure
The profile distribution of piston effect power changed over time in other words；And
Attached drawing 5 shows the simulation curve distribution of working chamber medium volume flow changed over time.
The following drawings is illustrated applicable, identical attached drawing mark is had based on the identical component of embodiment or device
Note.
Specific embodiment
Attached press machine shown in FIG. 11 has the upper mold 4 for being eccentrically driven the driving of mechanism 2.It will by connecting rod 6
It is connected with driving mechanism 2.Press machine 1 is designed to deep-draw machine.In order to which to workpiece applied force, press machine 1 has mould
10 deep-draw pad in other words of seat.It is fixed by operating force by the opposite direction of deep-draw pad 10 by upper mold 4 herein in punching course
It is applied on workpiece.In order to which power is adjusted, die holder in upper mold 4 can be adjusted by hydraulic control device 12
10 opposite fixed force.The control device has the working cylinder 14 with piston 16, reversed by the piston pair and upper mold 4
18 limit of working chamber or pressure medium chamber of effect.Die holder 10 and thereby the work being arranged between die holder and upper mold 4
Part is supported on piston 16.Working cylinder 14 is designed to the cylinder with differential effect of double action, and other than working chamber 18
There are also another working chambers 20.Piston rod 22 is arranged on piston 16 in its side, which passes through described another
A working chamber 20 and die holder 10 is located on the working chamber.For supply pressure medium and discharge pressure medium, active line
Road 24,26 is connected on working chamber 18,20.Wherein working line 24 divides for 28 He of first pressure media flow paths
Second pressure media flow paths 30.It by working chamber 18 and can be pressed by the two pressure medium flow paths 28,30
Storage tank T's power media slot is connected in other words.The throttling set 32 for being designed to 3/2 direction valve is wherein arranged in first pressure to be situated between
Among matter flow path 28, and the hydraulic machine 34 that adjustable, swash plate structural form axial piston machine will be designed as
It is arranged among second pressure media flow paths 30.There is throttling set 32 rest position (a) and drainage to adjust position
It sets (b).It can continuously adjust and can be manipulated with electromagnetic mode.Furthermore throttling set, which also has to become a mandarin, adjusts position
It sets (c) and there are three interfaces: pressure interface P, storage tank interface T and loading interfaces A.Loading interfaces A passes through the first pressure
The branch and working line 24 of the close load of power media flow path 28 are connected with working chamber 18.Pressure interface P
It is connected by high-tension line 36 with the pres-sure medium outlet of Hydraulic pump 38, which is designed to swash plate structural form
Adjustable axial piston machine.Branch and storage of the storage tank interface T further through the close storage tank of first pressure media flow paths
Case T is connected.The branch of the close storage tank of second pressure media flow paths 30 on the one hand with storage tank on the other hand and fluid power
The pressure medium interface of machinery 34 is connected.The branch of the close working chamber of second pressure media flow paths 30 herein with liquid
Another pressure medium interface of power machinery 34 is connected.The pressure medium inlet of Hydraulic pump 38 is connected with storage tank.
High-tension line 40 is separated from high-tension line 36, on the one hand branches off into working line 26, on the other hand branch off into depositing
Reservoir route 42.The high pressure hydraulic reservoir HD of two gas-loadeds is connected in memory circuit 42.Hydraulic machine
34 are coupled by drive shaft 44 with motor 46, which couples further through axis 48 with Hydraulic pump 38.Motor 46 is logical
Electric wire is crossed to be connected with power grid.
Hereinafter a pressure processing period will be explained by attached drawing 4 and attached drawing 1.Attached drawing 4 show pressure processing
The rough schematic view of four important feature parameters in period.1 institute of attached drawing is shown as imaginary curve above in attached drawing 4
Show the sliding block stroke s that t changes at any time of upper mold 4St.Deep-draw pad 10 shown in attached drawing 1 is additionally indicated with solid-line curve
Stroke sZk.T indicates four different stage I, II, III, IV and rank in cycles to the chart along the time axis
Section I.Separate these stages by vertical dotted line, for the ease of it is clear that these dotted lines attached drawing 4 all curve graph ranges
Interior extension.It is medium volume flow-time curve below journey time graph of relation above in attached drawing 4
Figure.Represented be the curve that medium volume flow Q is changed over time and its shown in the attached drawing 1 with working chamber 18
Direction in connected working line 24.It is throttling set 32 shown in attached drawing 1 below the curve in attached drawing 4
The unlatching section curve with above-mentioned phase change at any time.The nethermost curve of attached drawing 4 is working chamber shown in attached drawing 1
In cylinder stress in other words pressure at any time with the curve of phase change.It below will mainly with reference to the accompanying drawings 4 and with reference to attached
Component and appended drawing reference shown in Fig. 1 are illustrated the pressure processing period.
Its sliding block is separated from each other with deep-draw pad 10 in moment t=0 upper mold 4 in other words, and 4 can with reference to the accompanying drawings for this
To be found out with this, that is, curve sStIn curve sZkTop extends.Throttling set 32 is switched to its cut-off at the moment
Position (a) can be flowed in or out from without pressure medium via working line 24.Therefore medium volume flow
Q = 0.Curve graph A (t) expresses identical content, shows, and the unlatching section A of throttling set 32 is equal to 0.?
In nethermost curve graph shown in attached drawing 4, the pressure in the working chamber 18 at the moment is remained unchanged.The pressure wherein occupied
It is only derived from the smaller portions of pressure medium in deep-draw pad 10 and piston 14 and another working chamber 20 and is arranged in
The gravity of workpiece on deep-draw pad 10.The power F wherein synthesized by the piston area of the pressure and piston 16 is equivalent to
The gravity of above-mentioned component.
From moment tIIStart, deep-draw pad 10 declines so that workpiece preaceleration, in order to reduce upper mold 4
Relative impact velocity of the sliding block to workpiece.Curve s in attached drawing 4ZkAccordingly there is negative slope.The stage is also referred to as preaceleration
It stage and is identified according to attached drawing 4 with II.The sliding block of upper mold 4 is substantially in moment tIIAnd tIIICentre when
Phase starts to move downward, this is in curve sStNegative slope at can be seen that.In order to enable deep-draw pad 10 is able to carry out downwards
Movement, it is necessary to via 24 outflow pressure medium of working line from working chamber 18.It can be used in principle via throttling thus
The first pressure media flow paths 28 of device 32 and the second pressure medium of the present invention via hydraulic machine 34
Flow path 30.In attached second curve graph of upper number shown in Fig. 4, with solid-line curve indicate via working line 24 with
Whole medium volume flows that working chamber 18 exchanges.The imaginary curve changed linearly mostly is indicated herein via the second pressure
The gross pressure medium volume flow shares that power media flow path 30 flows out.It is clear that second pressure media flow
The medium volume flow share in path 30 independent of test process stage multiple times t be about 70 to
80%.From working chamber 18 towards pressure medium sink T and thereby therefore in II the and III stage, pressure medium volume flow is
Negative value.In the IV stage that piston 16 and thereby deep-draw pad 14 move upwards, according to the curve graph Q in attached drawing 4
(t) positive pressure medium volume stream is supplied to working chamber via two pressure medium flow paths 28 and 30 shown in
18.Extend above the zero curve of Q (t) curve graph corresponding to this solid-line curve and imaginary curve.
If observing attached third curve graph shown in Fig. 4, i.e. A (t) curve graph, then throttling dress is clear that
How the unlatching section for setting 32 is based on time change within I to IV stage.It is opened in preaceleration stage II
Section A must gradually rise first with the speed that the requirement of deep-draw pad 10 rises, while so control hydraulic machine 34
Lift volume, thus make its with open section A rising it is generally proportionate increase.
The sliding block of upper mold 4 is in moment tIIIEncounter on deep-draw pad 10, this is weighed from shown in the curve graph above attached drawing 4
Folded curve sStAnd sZkIt can be seen that.From this moment, in order to reach workpiece quality, power F and working chamber 18
In pressure p must have and certain change over time constant change curve in the present embodiment.Throttling can be passed through thus
The drainage adjusting position (b) of device 32 is by the branch and first of the close working chamber of first pressure media flow paths 28
The branch of the close storage tank in pressure medium flow path 28 is connected.With preaceleration stage II, in opposite Fixed-order
Pressure medium is discharged to institute there are two pressure medium flow from working chamber 18 also by working line 24 during section III
Among path 28,30.Wherein, additionally by 34 pressure recovery medium energy of hydraulic machine, while passing through throttling set
32 drainage adjusting position (b) adjusts the pressure in working chamber.It can be by the opposite direction fixed stage in A (t) curve graph
Slightly wavy curve finds out this adjusting in III.In addition to the opposite fixed force F in other words of the pressure in working chamber 18
Except slightly excessively high, in the curve graph as shown in below attached drawing 4 it can be seen that when opposite fixed stage III starts
Peak value is such, it is attached Fig. 4 schematically shows the adjusting of, pressure can be dedicated in working chamber 18 substantially invariable pressure and from
And it is dedicated to substantially invariable opposite fixed force.
The fixed stage III of opposite direction is in moment tIVTerminate and be transitioned into move upwards.From this moment, upper mold 4
It is moved upwards by shown in attached drawing 1 based on eccentric drive mechanism.Working cylinder 14 is controlled, so simultaneously so as to pass through active line
Pressure medium is supplied to working chamber 18 once again by road 24.According to attached second curve graph shown in Fig. 4, phase at this stage
Between can also find out well, the medium volume flow share substantially 70 to 80% supplied by hydraulic machine 34.Its
In adjusting position (c) become a mandarin by it to provide remainder in other words by throttling set 32.Corresponding to this, become a mandarin tune
The unlatching section A that section sets (c) increases first in moving upwards stage IV, and about at this stage at the end of court
To moment tIAgain drop to zero.The sliding block of piston 16, deep-draw pad 10 and upper mold 4 rises positioned at it again at the moment
Beginning position, as when moment t=0.
Attached curve graph shown in Fig. 4 obviously shows especially have very big energy to return in I, III and IV stage
Receive potentiality.
The potentiality can be improved by hydraulic machine 34, it can be in attached fluid power shown in FIG. 1 in II the and III stage
Revolving speed and torque are intercepted on mechanical output shaft 44.When motor 46 then works in the generator mode, so that it may pass through
Electrical power is fed among power grid by motor.The power directly can for example drive Hydraulic pump 38 or other set
It is standby.The difference shown in attached drawing 1 can also abandon the motor 46 of intermediate access, and can incite somebody to action in a kind of alternate embodiment
Hydraulic pump 38 is directly coupled with hydraulic machine 34.By means of which hydraulic machine 34 can in the II stage and/or
Pressure medium is given the driving of Hydraulic pump 38 from the III stage that working chamber 18 flows out and is supported, to help to recycle
Energy.Hydraulic pump 38 be may then pass through via high-tension line 36 and memory circuit 42 to attached liquid shown in FIG. 1
Power reservoir group is to charging hydraulic energy.
Attached drawing 2 show second of embodiment of press machine 101, which is approximately equivalent to 1 institute of attached drawing
The press machine 1 shown.The difference is that the hydraulic control device 112 of press machine 101 is also other than Hydraulic pump 38
With the Hydraulic pump 138 coupled by axis 148.It can wherein be returned by Hydraulic pump 138 to the low pressure of hydraulic control device
Road and low-voltage memory ND supply pressure medium.Low-voltage memory ND passes through memory circuit 142 and Hydraulic pump 138
Pres-sure medium outlet be connected.It is similar, high-pressure storage HD by high-tension line 36 and memory circuit 42 with
The pres-sure medium outlet of Hydraulic pump 38 is connected.Hydraulic control device 112 has 3/2 direction valve 150, is used for another
Working chamber 20 is connected either with high pressure or with low pressure.Direction valve has working interface B, which passes through work
Route 152 is connected with the pressure interface P of throttling set 32, and passes through the working line 154 and work from its branch
Another working chamber 20 for making cylinder 14 is connected.The high voltage interface P with 3/2 direction valve 150 herein of high-tension line 36H
It is connected.Start from the low pressure line of Hydraulic pump 138 then with the low-voltage interface P of direction valve 150NIt is connected.150 energy of direction valve
It reaches electromagnetically-operated and there is intermediate rest position (a), in this position by two working line phases of Hydraulic pump 38,138
Working interface B cut-off for direction valve 150.And in locations of high pressure (c), high-pressure storage HD then passes through storage
Device route 42 and high voltage interface PHIt is connected with working interface B, so as to pass through working line 154 for high-pressure
Medium is applied to another described pressure chamber 20.This is especially provided in preaceleration stage II.For all other rank
Duan Eryan, manipulation direction valve 150 enters its locations of low pressure (b), in this position by low-voltage interface PNAnd thereby low pressure is stored up
Storage ND and Hydraulic pump 138 are connected with working interface B.In this state, low pressure is in another working chamber 20
In work.
In order to also apply different pressure to working chamber 18, it is necessary to manipulate throttling set 32 and enter its tune that becomes a mandarin
Section sets (c), so that pressure interface P is connected with working interface A.
The presently shown detailed maps for the first embodiment shown in attached drawing 1 of attached drawing 3.It is used to describe to carry out
Press machine 1 needed for stating control and adjusting；101 hydraulic control device 12 in other words；112 component.The description is herein
Suitable for attached second of embodiment shown in Fig. 2.Described component, these portions are not discussed herein in attached drawing 1
Part have in attached drawing 1 appended drawing reference.
In order to control hydraulic machine 34 and adjust throttling set 32, attached hydraulic control device 12 shown in Fig. 3 has
There are multiple sensors for detecting required process variable and control unit to connect signal line in other words with required signal.
It has stroke rotation angle detection unit 60 in other words, and the rotation angle of driving device 2 can be detected by the unit.Stroke inspection
Unit 60 is surveyed to be connected by signal line 61 with control unit 62 herein.Furthermore control device also has pressure detecting list
Member 64 can detecte the pressure in another working chamber 20 by the unit, and the unit by signal line 65 with
Control unit 62 is connected.Furthermore it also has pressure sensing cell 66, can detecte in working chamber 18 by the unit
Pressure, and the unit is equally connected with control unit 62 by signal line 67.Furthermore it also has stroke detection list
Member 68 can detecte the stroke of piston 16 position in other words by the unit, and the unit by signal line 69 with
Control unit 62 is connected.For brevity, signal line 61,65,67,69 is indicated with broken string.
Therefore control unit 62 is obtained by above-mentioned detection unit and signal line at each moment of punching course has
It shuts mould 4, piston 16 and the location information of deep-draw pad 10 and workpiece and related occupies in other words in working chamber 18,20
In pressure information.As previously mentioned, wherein adjustable parameter is the curve of pressure in working chamber 18 changed over time.The volume
Determine curve to be stored among control device 62.
In order to control the lift volume of hydraulic machine 34, by signal line 70 by control unit 62 and hydraulic machine
The adjuster 72 of tool 34 is connected.Adjuster 72 acts on the hydraulic of hydraulic machine 34 by signal line 73 herein
Adjust the electromagnet of 3/2 direction valve of device 74.The adjustment device 74 can pass through direction valve and control pressure herein
Source 75 is connected.
The detailed view in attached drawing 3 of attached the first embodiment shown in FIG. 1 also additionally shows one and is designed to
The valve 76 of 2/2 direction valve, can by the valve by second pressure media flow paths 30 with respect to storage tank T pressure in other words
Media slot cut-off.Valve 76 has the rest position of spring pre-tightening thus and can pass through signal line by control unit 62
79 conduction positions manipulated with electromagnetic mode.Valve 76 is arranged in herein between hydraulic machine 34 and storage tank.
In order to realize circulation volume flow when valve 76 is closed, from the close of second pressure media flow paths 30
The branch of storage tank, one namely between hydraulic machine 34 and valve 76 punish out one and circulate path 80, this is followed
Ring flow path is passed among the branch for the second pressure media flow paths 30 that can be connected with working chamber 18.Non-return
Valve 82, which is arranged in, to be circulated among path 80, which can be with 18 phase of working chamber towards hydraulic machine 34
Pressure medium interface even is opened.It can be situated between now that should not have and/or not have pressure medium volume flow via second pressure
Path 80, check-valves 82 are circulated by above-mentioned in the punching press stage that matter flow path 30 and hydraulic machine 34 flow out
The circulation or bypass volume flow of hydraulic machine 34 are realized with valve 76.Hydraulic machine 34 is in these stages by motor
46 drivingly run in a pumping mode, and lift volume and controlled revolving speed with the control of controlled unit 62.It is suitable for
This working condition is kept within such a long time, as long as there is no absorb the pressure medium volume flow flowed out from working chamber
Demand.This can especially be realized and beneficial in attached preaceleration stage II shown in Fig. 4, by deep-draw pad during this stage
10 preaceleration are to adapt to the speed of upper mold 4.Valve 76 is maintained at attached drawing during the preaceleration stage by control unit 62
Rest position shown in 3.Once upper mold 4 is in moment tIIIIt is contacted with workpiece, control unit 62 is just for working chamber 18
In pressure and start to adjust.Above-mentioned circulation volume flow is proved to be at the moment it is particularly advantageous that because hydraulic machine just
34 have had required lift volume, and are no longer needed for the emptying time for improving lift volume from 0.At the moment
tIIIMust only guarantee valve 76 being transformed into conduction position from rest position by control unit 62, and by motor 46 from
Motoring mode is transformed into generator mode.
Hydraulic control device 12 has pressure limiting valve 84, and pump pressure can be limited by the pressure limiting valve to limit pressure
Pressure in power media pipeline 40 and hydraulic reservoir HD.
Furthermore hydraulic control device 12 also has there are two concatenated relief valve device 86, is protected by the relief valve device
It has demonstrate,proved to 18 supply pressure medium of working chamber, the working chamber rises on force-fitting direction of the deep-draw pad 10 with upper mold 4
Effect.
Attached drawing 5 is shown through two conventional control devices described in the prior art and the first embodiment institute of the invention
State the knot of the 32 simulated pressure medium volume stream Q of first pressure media flow paths 28 and throttling set of control device
Fruit.Imaginary curve in curve graph show traditional control device, wherein a kind of pressure water supplied just with pressure medium
Flat work, without second pressure media flow paths of the present invention.Chain-dotted line in attached drawing 5 show traditional liquid
Pressure control device, wherein similar with the explanation above to second of embodiment worked using two different stress levels, still
There is no second pressure media flow paths of the present invention.Third solid-line curve is indicated via first shown in attached drawing 1 and 3
The pressure medium volume flow of the throttling set 32 of kind embodiment, but substantially it is also applied for attached second shown in Fig. 2 in fact
Apply example.
According to shown in attached drawing 5, since quiescent phase I, via the pressure medium volume flow-of throttling set 32
It is exactly the remainder-of pressure medium volume flow not flowed out via hydraulic machine, being squeezed out from working chamber equal to zero.It is adjoint
Preaceleration stage II, pressure medium volume flow quickly falls to negative range in all three curves.In moment tIII
Start opposite fixed stage III.
Here the huge advantage of hydraulic control device of the present invention is shown now.It can find out well, the present invention
The pressure medium volume flow (solid line) of the hydraulic control device flowed out via throttling set 32 has than two tradition controls
The value that device (chain-dotted line and dotted line) processed may be significantly smaller.The energy for being changed into heat on throttling set with this corresponding is less than now
There is technology.The power that can be intercepted on output shaft 44 is generally proportionate with the difference of pressure medium volume flow herein, such as it
Shown in the double-head arrow in attached drawing 5 like that.
A kind of hydraulic control device for press machine particularly for deep-draw machine is disclosed, there is working cylinder, workpiece is especially
It can be supported on working cylinder by workseat or deep-draw pad by the power of upper mold.It is situated between by the pressure of the working chamber to working cylinder
The mode that plastid product stream throttles adjusts the power that workpiece is acted in pressing process.In order to recover energy, parallel
Hydraulic machine is set in pressure medium flow path, and the controllable share of pressure medium volume flow flows through hydraulic machine.It is additionally public
A kind of press machine with this hydraulic control device especially deep-draw machine is opened.
List of numerals
1;101 press machines
2 eccentric drive mechanisms
4 upper molds
6 connecting rods
10 die holders
12;112 hydraulic control devices
14 working cylinders
16 pistons
18,20 working chambers
24,26 working lines
28 first pressure media flow paths
30 second pressure media flow paths
32 throttling sets
34 hydraulic machines
36 high-tension lines
38;138 Hydraulic pumps
40 high-tension lines
42;142 memory circuits
44 drive shafts
46 motors
48;148 axis
150 direction valves
152,154 working lines
60 stroke detection units
61 signal lines
62 control units
64 pressure sensing cells
65 signal lines
66 pressure sensing cells
67 signal lines
68 stroke detection units
69,70 signal lines
72 adjusters
73 signal lines
74 adjustment devices
75 control pressure sources
76 valves
79 signal lines
80 circulate path
82 check-valves
84 pressure limiting valves
86 relief valve devices
Claims (13)
1. being used for press machine (1；101) hydraulic control device has working cylinder (14), and the working cylinder has at least one work
Make chamber (18), which, can be in press machine (1 by piston (16) limit；101) workpiece processed in can be towards upper mold
(4) it is directly or indirectly supported on the piston, arranging in first pressure media flow paths (28) can adjust
Throttling set, the working chamber (18) can be connected by the first pressure media flow paths with pressure medium sink (T), be led to
Pressure in the working chamber (18) can be adjusted by crossing the throttling set, which is characterized in that on second pressure media flow road
Hydraulic machine (34) is arranged in diameter (30) so that for pressure recovery function, the working chamber (18) can pass through the second pressure
Media flow paths are connected with pressure medium sink (T), wherein the hydraulic machine (34) can pass through drive shaft (44) and power
Converter (46) coupling, wherein the power inverter is motor (46), which is so designed, so that it at least can
It works in the generator mode, wherein the throttling set is designed to direction valve (32), and direction valve has rest position
(a) and there is drainage adjusting position (b), the first pressure media flow paths (28) can be cut by the rest position
Disconnected, at least one described working chamber (18) can be by the drainage adjusting position (b) via the first pressure media flow
Path (T) is connected with the pressure medium sink (T), and wherein, and the hydraulic machine (34) is such by control unit (62)
Control, so that the medium volume flow squeezed out from the working chamber (18) is predetermined between 60% to 95%
Part is discharged by the second pressure media flow paths (30) and by the hydraulic machine (34), and at the same time
The direction valve (32) is so adjusted, so that by be discharged by the first pressure media flow paths (28), institute
The remainder for stating pressure medium flow volume flow is throttled to keep the pressure in the working chamber (18) constant.
2. hydraulic control device according to claim 1 has valve (76), can cut off the second pressure by the valve
Media flow paths (30).
3. hydraulic control device according to claim 1 or 2 has and circulates path (80), circulated by this
It path can be by the pressure medium interface that can be connected at least one described working chamber (18) of the hydraulic machine and the liquid
The pressure medium interface that can be connected with the pressure medium sink (T) of power machinery (34) is connected.
4. the hydraulic control device according to claim 3, wherein arranged only in described circulate in path (80)
It returns valve (82), which opens towards the pressure medium interface that can be connected at least one described working chamber (18).
5. hydraulic control device according to claim 1 or 2, wherein design simultaneously to working cylinder (14) double action
And by the piston (16) to another working chamber (20) limit at least one described working chamber (18) acting in opposition.
6. hydraulic control device according to claim 1 or 2 has the fluid power storage that can be connected with the working chamber (18)
Storage (HD, ND).
7. hydraulic control device according to claim 1 or 2 has the fluid power that can be coupled with the hydraulic machine (34)
Pump (38；38,138), so as to the hydraulic control device (12；And/or the press machine (1 112)；101) pressure Jie is carried out
Matter supply.
8. hydraulic control device according to claim 1, wherein the direction valve (32) has the adjusting position that becomes a mandarin
(c), at least one described working chamber (18) can be connected with pressure medium source by the adjusting position that becomes a mandarin.
9. hydraulic control device according to claim 1 or 2 has at least one pressure sensing cell (66) and has
Stroke detection unit (60,68) is able to detect the pressure and the pressure at least one described working chamber (18) by it
Machine (1；101) lift of upper mold (4) and the piston (16), and there are control unit (62), described control unit is in
Among being connect with the signal of the detection unit.
10. hydraulic control device according to claim 9, wherein can be according to the time by described control unit (62)
Or lift controls the medium volume flows of the hydraulic machine (34).
11. hydraulic control device according to claim 9, wherein the lift volume of at least described hydraulic machine (34) is
It is can adjusting and can be controlled by described control unit (62).
12. press machine has the hydraulic control device (12 according at least one of the claims；112) and have
There is the upper mold (4) with the piston (16) acting in opposition, wherein the common of the upper mold (4) and the piston (16) can be passed through
Effect is to apply the power adjusted to the workpiece.
13. press machine according to claim 12, wherein Hydraulic pump (38；38,138) it is with the hydraulic machine (34)
Coupling.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE201210019665 DE102012019665A1 (en) | 2012-10-08 | 2012-10-08 | Hydraulic control arrangement for press such as punching machine, has hydraulic machine that comprises second pressure medium flow path via which working chamber is connected to pressure medium sink |
| DE102012019665.2 | 2012-10-08 |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN103711739A CN103711739A (en) | 2014-04-09 |
| CN103711739B true CN103711739B (en) | 2019-05-28 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201310596397.0A Active CN103711739B (en) | 2012-10-08 | 2013-10-08 | Hydraulic control device and press machine with this control device |
Country Status (3)
| Country | Link |
|---|---|
| CN (1) | CN103711739B (en) |
| DE (1) | DE102012019665A1 (en) |
| SE (1) | SE538392C2 (en) |
Families Citing this family (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE102014226236A1 (en) * | 2014-09-29 | 2016-03-31 | Robert Bosch Gmbh | Hydraulic circuit and machine with a hydraulic circuit |
| DE102016120068A1 (en) * | 2016-10-21 | 2018-04-26 | Voith Patent Gmbh | Hydraulic drive for a die cushion device of a press |
| DE102021006555A1 (en) | 2021-05-19 | 2022-11-24 | Robert Bosch Gesellschaft mit beschränkter Haftung | Die cushion and method of controlling the same |
| DE102021205065A1 (en) | 2021-05-19 | 2022-11-24 | Robert Bosch Gesellschaft mit beschränkter Haftung | Die cushion and method of controlling the same |
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| US6460332B1 (en) * | 1998-11-04 | 2002-10-08 | Komatsu Ltd. | Pressure oil energy recover/regenation apparatus |
| CN102182730A (en) * | 2011-05-05 | 2011-09-14 | 四川省成都普什机电技术研究有限公司 | Movable arm flow re-generation system with potential energy recovery device for excavator |
| CN102588396A (en) * | 2012-03-09 | 2012-07-18 | 三一重机有限公司 | Oil cylinder energy recovery and regeneration system |
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| CA2195301C (en) * | 1995-05-16 | 2005-03-15 | Rolf Truninger | Device with at least one hydraulic axis |
| DE10142147A1 (en) * | 2000-09-15 | 2002-03-28 | Luk Lamellen & Kupplungsbau | Supply of hydraulic fluid to e.g. automatic gears at controlled maximum pressure between nominal and system pressures, has greater control magnitude for higher pressures |
| CN2514327Y (en) * | 2001-08-22 | 2002-10-02 | 北京机电研究所 | Imitating loader for press |
| JP4121466B2 (en) * | 2004-02-06 | 2008-07-23 | 日立建機株式会社 | Hydraulic circuit of hydraulic working machine |
| CN101408213A (en) * | 2008-11-11 | 2009-04-15 | 浙江大学 | Energy recovery system of hybrid power engineering machinery energy accumulator-hydraulic motor |
| DE102010036204A1 (en) * | 2010-09-02 | 2012-03-08 | Robert Bosch Gmbh | Closing unit useful e.g. for injection molding-die casting, comprises fixed tool clamping plate and movable tool clamping plate, which are movable using electric or hydraulic drive, and hydraulically operated holding cylinder |
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2012
- 2012-10-08 DE DE201210019665 patent/DE102012019665A1/en active Pending
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2013
- 2013-10-02 SE SE1351162A patent/SE538392C2/en unknown
- 2013-10-08 CN CN201310596397.0A patent/CN103711739B/en active Active
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| US6460332B1 (en) * | 1998-11-04 | 2002-10-08 | Komatsu Ltd. | Pressure oil energy recover/regenation apparatus |
| CN102182730A (en) * | 2011-05-05 | 2011-09-14 | 四川省成都普什机电技术研究有限公司 | Movable arm flow re-generation system with potential energy recovery device for excavator |
| CN102588396A (en) * | 2012-03-09 | 2012-07-18 | 三一重机有限公司 | Oil cylinder energy recovery and regeneration system |
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Also Published As
| Publication number | Publication date |
|---|---|
| SE538392C2 (en) | 2016-06-07 |
| SE1351162A1 (en) | 2014-04-09 |
| CN103711739A (en) | 2014-04-09 |
| DE102012019665A1 (en) | 2014-04-10 |
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