CN110131225A - A kind of hydraulic control circuit and method of bender lower die locking cylinder - Google Patents
A kind of hydraulic control circuit and method of bender lower die locking cylinder Download PDFInfo
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- CN110131225A CN110131225A CN201910260051.0A CN201910260051A CN110131225A CN 110131225 A CN110131225 A CN 110131225A CN 201910260051 A CN201910260051 A CN 201910260051A CN 110131225 A CN110131225 A CN 110131225A
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- Prior art keywords
- fluid port
- hydraulic fluid
- lower die
- locking cylinder
- pressure
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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
- B21D37/00—Tools as parts of machines covered by this subclass
- B21D37/14—Particular arrangements for handling and holding in place complete dies
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F15—FLUID-PRESSURE ACTUATORS; HYDRAULICS OR PNEUMATICS IN GENERAL
- F15B—SYSTEMS ACTING BY MEANS OF FLUIDS IN GENERAL; FLUID-PRESSURE ACTUATORS, e.g. SERVOMOTORS; DETAILS OF FLUID-PRESSURE SYSTEMS, NOT OTHERWISE PROVIDED FOR
- F15B11/00—Servomotor systems without provision for follow-up action ; Circuits therefor
- F15B11/16—Servomotor systems without provision for follow-up action ; Circuits therefor with two or more 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
-
- 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
- F15B2211/72—Output members, e.g. hydraulic motors or cylinders or control therefor having locking 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)
- Bending Of Plates, Rods, And Pipes (AREA)
- Supply Devices, Intensifiers, Converters, And Telemotors (AREA)
Abstract
The invention discloses the hydraulic control circuits and method of a kind of bender lower die locking cylinder, this method comprises: reversal valve enters the second operating conditions, pressure oil enters the first hydraulic fluid port by pressure reducing valve, enter in rodless cavity from the outflow of the 4th hydraulic fluid port, first check valve is opened, and the hydraulic oil in rod chamber enters third hydraulic fluid port by the first check valve, is flowed out from the second hydraulic fluid port, the piston of bender lower die locking cylinder stretches out, into opening state.Reversal valve power-off, the cut-off of the first hydraulic fluid port, the cut-off of the first check valve, pressure oil stop flowing, bender lower die locking cylinder stopping movement.Reversal valve enters the first operating conditions, and pressure oil enters the first hydraulic fluid port by pressure reducing valve, flows out from third hydraulic fluid port, and rod chamber is entered after booster, and the piston of bender lower die locking cylinder, which retracts, is in locking state.The hydraulic control circuit and method of bender lower die locking cylinder of the invention, no setting is required, and hydraulic station is pressurized, and cost is relatively low, and installation maintenance is simpler, and response speed is faster.
Description
Technical field
The present invention relates to technical field of hydraulic more particularly to a kind of hydraulic control circuits of bender lower die locking cylinder
And method.
Background technique
Hydraulic drive refers to a kind of kind of drive that energy transmission and control are carried out using liquid as working media, is widely applied
In Mechanical course field.For example, bender lower die locking cylinder realizes the operations such as opening, stopping and locking under hydraulic control.
The hydraulic control circuit for the bender lower die locking cylinder that the prior art provides includes: hydraulic station, pressure regulation valve group, safety
Valve, reversal valve and pressure switch.When bender lower die locking cylinder starts, hydraulic station pressure oil output, pressure regulation valve group is for setting
Determine system demand pressure, pressure oil enters reversal valve by P mouthfuls and enters rodless cavity from B mouthfuls of outflows, and hydraulic oil passes through A in rod chamber
Mouth enters reversal valve from T mouthfuls of outflow oil returns.When P, T, A, B oil of reversal valve disconnect, the movement of bender lower die locking cylinder stops.
When locking, start hydraulic station, pressure oil output, pressure regulation valve group sets system demand pressure, and pressure oil enters by reversal valve
The rod chamber of bender lower die locking cylinder, the hydraulic oil in rodless cavity flow back to fuel tank, pressure switch locking pressure by reversal valve
Force sender, hydraulic station stop working, and complete locking.
The inventor finds that the existing technology has at least the following problems: pressure needed for providing hydraulic oil by setting hydraulic station
Power keeps system cost higher, and volume is larger, increases site layout project difficulty.
Summary of the invention
To solve above-mentioned the technical problems existing in the prior art, the present invention provides a kind of bender lower die locking cylinders
Hydraulic control circuit and method.Specific technical solution is as follows:
In a first aspect, providing a kind of hydraulic control circuit of bender lower die locking cylinder, comprising: reversal valve, booster,
Pressure reducing valve and pressure switch；First hydraulic fluid port oil inlet of the reversal valve, the second hydraulic fluid port is fuel-displaced, the 4th hydraulic fluid port and bender lower die
The rodless cavity of locking cylinder is connected to, and third hydraulic fluid port is connected to by the booster with the rod chamber of bender lower die locking cylinder, bending
The rod chamber of machine lower die locking cylinder is connected to by the first check valve with the third hydraulic fluid port, when first check valve is opened, institute
Stating the hydraulic oil in rod chamber can circulate to the third hydraulic fluid port, when the reversal valve is under the first operating conditions, first oil
Mouth is connected to the third hydraulic fluid port, and second hydraulic fluid port is connected to the 4th hydraulic fluid port, and the reversal valve is under the second operating conditions
When, first hydraulic fluid port is connected to the 4th hydraulic fluid port, and second hydraulic fluid port is connected to the third hydraulic fluid port；The pressure reducing valve connects
It connects on the oil inlet pipe of first hydraulic fluid port, for adjusting the input pressure of the reversal valve, the booster is used for pressure
Power oil is pressurized；The pressure switch is used to detect the locking pressure of the bender lower die locking cylinder, and according to described
It locks pressure and controls the commutation valve events.
In a kind of possible design, the booster includes piston and piston control valve, the piston control valve control
The reciprocating motion of the pistons is until pressure oil reaches preset pressure.
In a kind of possible design, the circuit further includes safety valve, one end of the safety valve and the rodless cavity
Piping connection between the 4th hydraulic fluid port, the other end are connect with the oil outlet pipe of second hydraulic fluid port.
In a kind of possible design, the pressure switch includes the first contact and the second contact, first contact
When closure, the reversal valve obtain it is electric enter the first operating conditions, when second contact closure, the reversal valve power-off；The lock
When compaction forces reach default locking pressure spot, second contact closure, when the locking pressure is less than default locking pressure spot,
First contact closure.
In a kind of possible design, first check valve is the hydraulic control one-way valve inside the booster, described to change
When obtaining the second state of electric entrance to valve, first check valve is opened.
Second aspect provides a kind of hydraulic control method of bender lower die locking cylinder, which comprises
Reversal valve obtains the second operating conditions of electric entrance, and pressure oil enters the first hydraulic fluid port by pressure reducing valve, flows out from the 4th hydraulic fluid port
Into in the rodless cavity of bender lower die locking cylinder, the first check valve is opened, the liquid in the rod chamber of bender lower die locking cylinder
Pressure oil enters third hydraulic fluid port by the first check valve, flows out from the second hydraulic fluid port, and the piston of bender lower die locking cylinder stretches out, bending
Machine lower die locking cylinder enters opening state；
Reversal valve power-off, the first hydraulic fluid port cut-off, the first check valve cut-off, pressure oil stop flowing, the folding
Bender lower die locking cylinder stopping movement；
Reversal valve obtains the first operating conditions of electric entrance, and pressure oil enters first hydraulic fluid port by pressure reducing valve, from the third
Hydraulic fluid port outflow, enters the rod chamber after the charger boost, and the piston retraction of the bender lower die locking cylinder is in
Locking state, the pressure switch control the reversal valve and obtain electric or power loss, and the bender lower die locking cylinder is made to keep lock
Tight state.
In a kind of possible design, the pressure switch controls the reversal valve and obtains electric or power loss, makes the bending
Machine lower die locking cylinder maintains the lock status, comprising: the locking pressure of the bender lower die locking cylinder reaches default locking pressure
When point, second contact closure, the reversal valve power-off, the locking pressure of the bender lower die locking cylinder, which is less than, presets lock
When pressing force, first contact closure, the reversal valve obtains electric into the first operating conditions.
The major advantage of technical solution of the present invention is as follows:
The hydraulic control circuit and method of bender lower die locking cylinder of the invention, by booster and pressure reducing valve to hydraulic
The pressure of oil is controlled, and no setting is required compared with prior art, and independent high-pressure and hydraulic station is pressurized, easy to operate effective,
Cost is relatively low, and installation maintenance is simpler, and is not necessarily to frequent starting hydraulic station, and response speed is faster.
Detailed description of the invention
Attached drawing described herein is used to provide to further understand the embodiment of the present invention, constitutes of the invention one
Point, the illustrative embodiments of the present invention and their descriptions are used to explain the present invention, does not constitute improper limitations of the present invention.Attached
In figure:
Fig. 1 is the hydraulic control circuit structural schematic diagram of bender lower die locking cylinder provided by one embodiment of the present invention.
Specific embodiment
To make the object, technical solutions and advantages of the present invention clearer, below in conjunction with the specific embodiment of the invention and
Technical solution of the present invention is clearly and completely described in corresponding attached drawing.Obviously, described embodiment is only of the invention
A part of the embodiment, instead of all the embodiments.Based on the embodiment of the present invention, those of ordinary skill in the art are not doing
Every other embodiment obtained under the premise of creative work out, shall fall within the protection scope of the present invention.
Below in conjunction with attached drawing, the technical solution of embodiment that the present invention will be described in detail offer.
In a first aspect, the embodiment of the invention provides a kind of hydraulic control circuits of bender lower die locking cylinder, such as attached drawing 1
Shown, the hydraulic control circuit of the bender lower die locking cylinder includes: reversal valve 1, booster 2, pressure reducing valve 3 and pressure switch
4.First hydraulic fluid port P oil inlet of reversal valve 1, the second hydraulic fluid port T is fuel-displaced, and the rodless cavity of the 4th hydraulic fluid port B and bender lower die locking cylinder connects
Logical, third hydraulic fluid port A is connected to by booster 2 with the rod chamber of bender lower die locking cylinder, and bender lower die locking cylinder has bar
Chamber is connected to by the first check valve POV with third hydraulic fluid port A, and when the first check valve POV opening, hydraulic oil in rod chamber can be to the
Three hydraulic fluid port A circulation, when reversal valve 1 is under the first operating conditions, the first hydraulic fluid port P is connected to third hydraulic fluid port A, the second hydraulic fluid port T and the 4th
Hydraulic fluid port B connection, when reversal valve 1 is under the second operating conditions, the first hydraulic fluid port P is connected to the 4th hydraulic fluid port B, the second hydraulic fluid port T and third oil
Mouth A connection.Pressure reducing valve 3 is connected on the oil inlet pipe of the first hydraulic fluid port P, for the input pressure of adjustable change valve 1, booster 2
For being pressurized to pressure oil.Pressure switch 4 is used to detect the locking pressure of bender lower die locking cylinder, and according to locking
Pressure controls reversal valve 1 and acts.
The working principle of the hydraulic control circuit of bender lower die locking cylinder provided in an embodiment of the present invention is carried out below
Illustrate:
In use, can be made under bending machine by the working condition of real-time adjustable change valve 1 and the first check valve POV
Mould locking cylinder enters opening, stopping or locking state.When need to open bender lower die locking cylinder, the Yb of reversal valve 1 obtains electric, changes
Enter the second operating conditions to valve 1, the first hydraulic fluid port P is connected to the 4th hydraulic fluid port B, and the second hydraulic fluid port T is connected to third hydraulic fluid port A.Pressure oil
Enter the first hydraulic fluid port P by pressure reducing valve 3, enter in the rodless cavity of bender lower die locking cylinder from the 4th hydraulic fluid port B outflow, first is single
It is opened to valve POV, the hydraulic oil in the rod chamber of bender lower die locking cylinder enters third hydraulic fluid port A by the first check valve POV,
It is flowed out from the second hydraulic fluid port T, the piston of bender lower die locking cylinder stretches out, and bender lower die locking cylinder enters opening state.It need to stop
Only when the piston action of bender lower die locking cylinder, reversal valve 1 is powered off, and the first hydraulic fluid port P cut-off, hydraulic oil can not flow into rodless cavity
Interior, the first check valve POV ends, and the hydraulic oil in rod chamber can not flow out, and hydraulic oil stops flowing, bender lower die locking cylinder
Stopping movement.When need to lock bender lower die locking cylinder, the Ya of reversal valve 1 obtain it is electric, reversal valve 1 enter the first operating conditions, first
Hydraulic fluid port P is connected to third hydraulic fluid port A, and the second hydraulic fluid port T is connected to the 4th hydraulic fluid port B, and pressure oil enters the first hydraulic fluid port P by pressure reducing valve 3,
It is flowed out from third hydraulic fluid port A, the rod chamber of bender lower die locking cylinder, bender lower die locking cylinder is entered after the pressurization of booster 2
Piston retract be in locking state, pressure switch 4 control reversal valve 1 electric or power loss, make bender lower die locking cylinder protect
Hold locking state.
As it can be seen that the hydraulic control circuit of bender lower die locking cylinder provided in an embodiment of the present invention, by booster 2 with subtract
Pressure valve 3 controls the pressure of hydraulic oil, and no setting is required compared with prior art, and independent high-pressure and hydraulic station is pressurized, behaviour
Make simple and effective, cost is relatively low, and installation maintenance is simpler, and is not necessarily to frequent starting hydraulic station, and response speed is faster.
Wherein, how booster 2 is pressurized hydraulic oil, is illustrated below: booster 2 includes piston
PSV and piston control valve PCV, piston control valve PCV control piston PSV are moved back and forth until pressure oil reaches preset pressure.Increase
When the piston PSV movement of depressor 2, hydraulic oil is pressurized, a round trip of piston PSV is pressurized default pressure to hydraulic oil
Power.Piston control valve PCV controls the number that piston PSV is moved back and forth, and then hydraulic oil is made to be pressurized to preset pressure.
Specifically, when piston PSV moves to end every time, an arriving signal S, piston are sent to piston control valve PCV
After control valve PCV receives arriving signal S, determine whether the pressure of hydraulic oil reaches preset pressure, if so, piston PSV stops
Movement, if it is not, piston control valve PCV control piston PSV continues to move to end after resetting.
Further, in order to improve security performance, the hydraulic control of bender lower die locking cylinder provided in an embodiment of the present invention
Circuit processed further includes safety valve 5, between one end of safety valve 5 and the rodless cavity of bender lower die locking cylinder and the 4th hydraulic fluid port B
Piping connection, the other end are connect with the oil outlet pipe of the second hydraulic fluid port T.
Optionally, pressure switch 4 includes the first contact FD1 and the second contact FD2, when the first contact FD1 is closed, commutation
Valve 1 electric must enter the first operating conditions, and when the second contact FD2 is closed, reversal valve 1 is powered off.Locking pressure reaches default locking pressure
When point, the second contact FD2 closure, when locking pressure is less than default locking pressure spot, the first contact FD1 closure.So set, energy
Remain at bender lower die locking cylinder at default locking pressure spot, locking property is preferable.
In the embodiment of the present invention, the first check valve POV is the hydraulic control one-way valve inside booster 2, and reversal valve 1 obtains electric entrance
When the second state, the first check valve POV is opened.So set, the first check valve POV is beaten when reversal valve 1 enters the second operating conditions
It opens, the hydraulic oil in rod chamber can smoothly flow back.
Specifically, when reversal valve 1 is in the second operating conditions, the control oil PL for picking up from the 4th hydraulic fluid port B opens first list
To valve POV.
Optionally, as shown in Fig. 1, the hydraulic control circuit of bender lower die locking cylinder provided in an embodiment of the present invention is also
Hydraulic oil is not being hindered just including second one-way valve CV1 and third check valve CV2, second one-way valve CV1 and third check valve CV2
Often flowing can be avoided hydraulic oil adverse current, improve safety in utilization and stability.Wherein, second one-way valve CV1 and third are unidirectional
Valve CV2 is 2 internal one-way valve of booster.
Second aspect, the embodiment of the invention provides a kind of hydraulic control method of bender lower die locking cylinder, this method
Include:
Reversal valve 1 electric must enter the second operating conditions, and pressure oil enters the first hydraulic fluid port P by pressure reducing valve 3, from the 4th hydraulic fluid port B
Outflow enters in the rodless cavity of bender lower die locking cylinder, and the first check valve POV is opened, the rod chamber of bender lower die locking cylinder
Interior hydraulic oil enters third hydraulic fluid port A by the first check valve POV, flows out from the second hydraulic fluid port T, the work of bender lower die locking cylinder
Plug stretches out, and bender lower die locking cylinder enters opening state.
Reversal valve 1 powers off, the first hydraulic fluid port P cut-off, the first check valve POV cut-off, and hydraulic oil stops flowing, bender lower die
Locking cylinder stopping movement.
Reversal valve 1 electric must enter the first operating conditions, and pressure oil enters the first hydraulic fluid port P by pressure reducing valve 3, from third hydraulic fluid port A
Outflow enters the rod chamber of bender lower die locking cylinder, at the piston retraction of bender lower die locking cylinder after the pressurization of booster 2
In locking state, pressure switch 4 controls reversal valve 1 and obtains electric or power loss, and bender lower die locking cylinder is made to maintain the lock status.
In use, can be made under bending machine by the working condition of real-time adjustable change valve 1 and the first check valve POV
Mould locking cylinder enters opening, stopping or locking state.When need to open bender lower die locking cylinder, the Yb of reversal valve 1 obtains electric, changes
Enter the second operating conditions to valve 1, the first hydraulic fluid port P is connected to the 4th hydraulic fluid port B, and the second hydraulic fluid port T is connected to third hydraulic fluid port A.Pressure oil
Enter the first hydraulic fluid port P by pressure reducing valve 3, enter in the rodless cavity of bender lower die locking cylinder from the 4th hydraulic fluid port B outflow, first is single
It is opened to valve POV, the hydraulic oil in the rod chamber of bender lower die locking cylinder enters third hydraulic fluid port A by the first check valve POV,
It is flowed out from the second hydraulic fluid port T, the piston of bender lower die locking cylinder stretches out, and bender lower die locking cylinder enters opening state.It need to stop
Only when the piston action of bender lower die locking cylinder, reversal valve 1 is powered off, and the first hydraulic fluid port P cut-off, hydraulic oil can not flow into rodless cavity
Interior, the first check valve POV ends, and the hydraulic oil in rod chamber can not flow out, and hydraulic oil stops flowing, bender lower die locking cylinder
Stopping movement.When need to lock bender lower die locking cylinder, the Ya of reversal valve 1 obtain it is electric, reversal valve 1 enter the first operating conditions, first
Hydraulic fluid port P is connected to third hydraulic fluid port A, and the second hydraulic fluid port T is connected to the 4th hydraulic fluid port B, and pressure oil enters the first hydraulic fluid port P by pressure reducing valve 3,
It is flowed out from third hydraulic fluid port A, the rod chamber of bender lower die locking cylinder, bender lower die locking cylinder is entered after the pressurization of booster 2
Piston retract be in locking state, pressure switch 4 control reversal valve 1 electric or power loss, make bender lower die locking cylinder protect
Hold locking state.
As it can be seen that the hydraulic control method of bender lower die locking cylinder provided in an embodiment of the present invention, by booster 2 with subtract
Pressure valve 3 controls the pressure of hydraulic oil, and no setting is required compared with prior art, and hydraulic station is pressurized, easy to operate to have
Effect, cost is relatively low, and installation maintenance is simpler, and is not necessarily to frequent starting hydraulic station, and response speed is faster.
Wherein, pressure switch 4 controls reversal valve 1 and obtains electric or power loss, and bender lower die locking cylinder is made to maintain the lock status,
When including: that the locking pressure of bender lower die locking cylinder reaches default locking pressure spot, the second contact FD2 closure, reversal valve 1 is disconnected
Electricity, when the locking pressure of bender lower die locking cylinder is less than default locking pressure spot, the first contact FD1 closure, reversal valve 1 obtains electric
Into the first operating conditions.In this way, controlling the working condition of reversal valve 1 by pressure switch 4, bender lower die locking cylinder is made to begin
It maintains the lock status eventually.
Below with reference to attached drawing 1 to the work of the hydraulic control circuit of bender lower die locking cylinder provided in an embodiment of the present invention
It is illustrated as principle:
Bender lower die locking cylinder opening procedure: the Yb of reversal valve 1 obtains electric, the first hydraulic fluid port P of reversal valve 1 the logical 4th at this time
Hydraulic fluid port B, third hydraulic fluid port A lead to the second hydraulic fluid port T, and pressure oil P1 enters from the first hydraulic fluid port P after pressure reducing valve 3, the 4th hydraulic fluid port B outflow, warp
It crosses pipe B1 and enters the rodless cavity of bender lower die locking cylinder, while controlling oily PL and opening the first check valve POV, bender lower die lock
The rod chamber hydraulic oil of tight cylinder passes through pipe A1, the first check valve POV, third hydraulic fluid port A, the second hydraulic fluid port T oil return, bender lower die lock
Tight the cylinder piston, which is stretched out, unclamps.
Bender lower die locking cylinder stops: the power-off of reversal valve 1 returns to middle position, and reversal valve the first hydraulic fluid port P ends at this time, third
Hydraulic fluid port A, the 4th hydraulic fluid port B, the second hydraulic fluid port T are logical, the first check valve POV locking, and oil-free liquid stream is dynamic, and bender lower die locking cylinder stops
Movement.
The locking of bender lower die locking cylinder: for setting 1 inlet pressure P1 of reversal valve, the Ya of reversal valve 1 is obtained pressure reducing valve 3
Electricity, the first hydraulic fluid port P of reversal valve 1 leads to third hydraulic fluid port A at this time, and the 4th hydraulic fluid port B leads to the second hydraulic fluid port TT, and pressure oil P1 passes through booster
2 function of increasing pressure realize pressure rise, and the pressure oil P2 after boosting enters the rod chamber of bender lower die locking cylinder by pipe A1, roll over
Bender lower die is locked the cylinder piston and is retracted in locking state, the second contact FD2 sender of pressure switch 4, and the Ya of reversal valve 1 is disconnected
Electricity, reversal valve 1 return to middle position pressure maintaining；When the first contact FD1 sender of pressure switch 4, the Ya of reversal valve 1 again it is electric,
It locks, so recycles again, the Ya that reversal valve 1 is controlled by pressure switch 4 obtains power off and realizes locking.
It should be noted that, in this document, the relational terms of such as " first " and " second " or the like are used merely to one
A entity or operation with another entity or operate distinguish, without necessarily requiring or implying these entities or operation it
Between there are any actual relationship or orders.Moreover, the terms "include", "comprise" or its any other variant are intended to
Cover non-exclusive inclusion, so that the process, method, article or equipment for including a series of elements not only includes those
Element, but also including other elements that are not explicitly listed, or further include for this process, method, article or setting
Standby intrinsic element.In addition, placement shape of "front", "rear", "left", "right", "upper", the "lower" herein to be indicated in attached drawing
State is reference.
Finally, it should be noted that the above examples are only used to illustrate the technical scheme of the present invention, rather than its limitations；Although
Present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that: it still may be used
To modify the technical solutions described in the foregoing embodiments or equivalent replacement of some of the technical features；
And these are modified or replaceed, technical solution of various embodiments of the present invention that it does not separate the essence of the corresponding technical solution spirit and
Range.
Claims (7)
1. a kind of hydraulic control circuit of bender lower die locking cylinder characterized by comprising reversal valve, booster, pressure reducing valve
And pressure switch；
First hydraulic fluid port oil inlet of the reversal valve, the second hydraulic fluid port is fuel-displaced, the rodless cavity of the 4th hydraulic fluid port and bender lower die locking cylinder
Connection, third hydraulic fluid port are connected to by the booster with the rod chamber of bender lower die locking cylinder, bender lower die locking cylinder
Rod chamber is connected to by the first check valve with the third hydraulic fluid port, liquid when first check valve is opened, in the rod chamber
Pressure oil can circulate to the third hydraulic fluid port, when the reversal valve is under the first operating conditions, first hydraulic fluid port and third oil
Mouth connection, second hydraulic fluid port is connected to the 4th hydraulic fluid port, when the reversal valve is under the second operating conditions, first hydraulic fluid port
It is connected to the 4th hydraulic fluid port, second hydraulic fluid port is connected to the third hydraulic fluid port；
The pressure reducing valve is connected on the oil inlet pipe of first hydraulic fluid port, for adjusting the input pressure of the reversal valve, institute
Booster is stated for being pressurized to pressure oil；
The pressure switch is used to detect the locking pressure of the bender lower die locking cylinder, and according to the locking pressure control
Make the commutation valve events.
2. the hydraulic control circuit of bender lower die locking cylinder according to claim 1, which is characterized in that the booster
Including piston and piston control valve, the piston control valve controls the reciprocating motion of the pistons until pressure oil reaches default pressure
Power.
3. the hydraulic control circuit of bender lower die locking cylinder according to claim 1, which is characterized in that the circuit is also
Including safety valve, piping connection between one end of the safety valve and the rodless cavity and the 4th hydraulic fluid port, the other end with
The oil outlet pipe of second hydraulic fluid port connects.
4. according to the hydraulic control circuit of bender lower die locking cylinder described in right 1, which is characterized in that the pressure switch
Including the first contact and the second contact, when first contact closure, the reversal valve obtain it is electric enter the first operating conditions, described the
When two contact closures, the reversal valve power-off；
When the locking pressure reaches default locking pressure spot, second contact closure, the locking pressure is less than default lock
When pressing force, first contact closure.
5. the hydraulic control circuit of bender lower die locking cylinder according to claim 1, which is characterized in that described first is single
To the hydraulic control one-way valve that valve is inside the booster, when the reversal valve obtains the second state of electric entrance, first check valve
It opens.
6. a kind of hydraulic control method of bender lower die locking cylinder, which is characterized in that the described method includes:
Reversal valve obtain it is electric enter the second operating conditions, pressure oil by pressure reducing valve enter the first hydraulic fluid port, from the 4th hydraulic fluid port flow out enter
In the rodless cavity of bender lower die locking cylinder, the first check valve is opened, the hydraulic oil in the rod chamber of bender lower die locking cylinder
Enter third hydraulic fluid port by the first check valve, flowed out from the second hydraulic fluid port, the piston of bender lower die locking cylinder stretches out, under bending machine
Mould locking cylinder enters opening state；
Reversal valve power-off, the first hydraulic fluid port cut-off, the first check valve cut-off, pressure oil stop flowing, the bending machine
Lower die locking cylinder stopping movement；
Reversal valve obtains the first operating conditions of electric entrance, and pressure oil enters first hydraulic fluid port by pressure reducing valve, from the third hydraulic fluid port
Outflow, enters the rod chamber after the charger boost, and the piston of the bender lower die locking cylinder is retracted in locking
State, the pressure switch control the reversal valve and obtain electric or power loss, and the bender lower die locking cylinder is made to keep locking shape
State.
7. the hydraulic control method of bender lower die locking cylinder according to claim 6, which is characterized in that the pressure after
Reversal valve described in electrical equipment control obtains electric or power loss, and the bender lower die locking cylinder is made to maintain the lock status, comprising:
When the locking pressure of the bender lower die locking cylinder reaches default locking pressure spot, second contact closure is described
Reversal valve power-off, when the locking pressure of the bender lower die locking cylinder is less than default locking pressure spot, first contact is closed
It closes, the reversal valve obtains electric into the first operating conditions.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910260051.0A CN110131225B (en) | 2019-04-02 | 2019-04-02 | Hydraulic control loop and method for lower die locking cylinder of bending machine |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910260051.0A CN110131225B (en) | 2019-04-02 | 2019-04-02 | Hydraulic control loop and method for lower die locking cylinder of bending machine |
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| CN110131225A true CN110131225A (en) | 2019-08-16 |
| CN110131225B CN110131225B (en) | 2021-03-05 |
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| CN201910260051.0A Active CN110131225B (en) | 2019-04-02 | 2019-04-02 | Hydraulic control loop and method for lower die locking cylinder of bending machine |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110939628A (en) * | 2019-12-05 | 2020-03-31 | 江苏悦达专用车有限公司 | Safety protection type hydro-cylinder device |
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