CN207701490U - A kind of electro-hydraulic numerical control Synchronous Bending machine hydraulic system of double servo-pump controls - Google Patents
A kind of electro-hydraulic numerical control Synchronous Bending machine hydraulic system of double servo-pump controls Download PDFInfo
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- CN207701490U CN207701490U CN201721645295.3U CN201721645295U CN207701490U CN 207701490 U CN207701490 U CN 207701490U CN 201721645295 U CN201721645295 U CN 201721645295U CN 207701490 U CN207701490 U CN 207701490U
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Abstract
The utility model discloses a kind of double electro-hydraulic numerical control Synchronous Bending machine hydraulic systems of servo-pump control, including speed-up cylinder, oil return line, the first oil circuit, the second oil circuit and third oil circuit；Oil return line is equipped with prefill valve, and one end of oil return line is connect with the speed-up cylinder, and the other end connects fuel tank；First oil circuit is equipped with the first reversal valve, and one end of first oil circuit connects with the speed-up cylinder, and the other end connects fuel tank；Second oil circuit one end connects with the speed-up cylinder, and the other end connects with first reversal valve, and fast lower valve, overflow valve, check valve and counterbalance valve are equipped on second oil circuit；One end of the third oil circuit connects with first oil circuit and the second oil circuit, and the other end connects with the fuel tank, and safety valve is equipped on the third oil circuit；The second reversal valve is equipped between the third oil circuit and oil return line；Third reversal valve is connected between the oil return line and the first oil circuit.The utility model has achieved the effect that noise reduction environmental protection.
Description
Technical field
The utility model is related to a kind of electro-hydraulic numerical control benders more particularly to a kind of electro-hydraulic numerical control of double servo-pump controls to synchronize folding
The hydraulic system of bender.
Background technology
Electro-hydraulic numerical control bender depends on machine as one of the indispensable equipment in metal plate manufacturing industry, the quality of product
The control accuracy of bed, the efficiency of production depend on the speed of lathe.
Nowadays each cycle of numerical control bender can be divided into six processes：Under fast, work into, pressurize, pressure release, return
Journey, stopping.In each course of work, the pressure and speed that provide hydraulic system also differ.Traditional numerical control bending
Machine hydraulic system be by a common threephase asynchronous (rotating speed is non-adjustable) and quantitative hydraulic pump provide pressure and
The hydraulic oil, but in the entire cycle of lathe (including lathe halted state), oil pump is in the constant motor band that runs at high speed
Under dynamic, it is lasting to hydraulic system for pressure oil, but in each cycle, when only work is into return, what motor was done is to have
Hard, remaining hydraulic oil all flows back to fuel tank by electric proportional pressure control valve, and what motor was done is idle work.And in whole process
In, idle work accounts for about 2/3, and hydraulic oil temperature increases very fast at this time, and oil temperature is higher, has both influenced the service life of hydraulic oil, while right
Hydraulic system also has an adverse effect.
Traditional electro-hydraulic numerical control Synchronous Bending machine is in entire cycle, relative to the electro-hydraulic numerical control Synchronous Bending of double servo-pump controls
Machine hydraulic system, efficiency is low, energy consumption is high, noise is big, not environmentally.
Utility model content
The purpose of this utility model is to solve the problems of the prior art, provides a kind of electro-hydraulic numerical control synchronization of double servo-pump controls
Bender hydraulic system.
The technical solution of the utility model is：A kind of electro-hydraulic numerical control Synchronous Bending machine hydraulic system of double servo-pump controls, including
One fuel tank, the servopump to connect with the fuel tank and the driving servopump watching the hydraulic oil extraction in the fuel tank
Take motor；It is characterized in that：Further include speed-up cylinder, oil return line, the first oil circuit, the second oil circuit and third oil circuit；The oil return
Road is equipped with prefill valve, and one end of the oil return line is connect with the speed-up cylinder, and the other end connects fuel tank；It is set on first oil circuit
There is the first reversal valve, one end of first oil circuit connects with the speed-up cylinder, and the other end connects fuel tank；Second oil circuit one end
Connect with the speed-up cylinder, the other end connects with first reversal valve, and fast lower valve, overflow are equipped on second oil circuit
Valve, check valve and counterbalance valve；One end of the third oil circuit connects with first oil circuit and the second oil circuit, the other end and institute
It states fuel tank to connect, safety valve is equipped on the third oil circuit；The second reversal valve is equipped between the third oil circuit and oil return line；Institute
It states and is connected with third reversal valve between oil return line and the first oil circuit.
Preferably, fast lower valve and the concatenated overflow valve of fast lower valve and the overflow are connected on second oil circuit
The check valve of valve parallel connection and the counterbalance valve in parallel with the fast lower valve.
Preferably, second reversal valve connects with a wherein branch for the first oil circuit.
Preferably, one end of the third reversal valve is connected by two branches with first oil circuit, the other end with it is described
Prefill valve connects.
Preferably, first segment discharge orifice is equipped between the prefill valve and the third reversal valve；First oil circuit with
It is equipped with principal pressure overflow valve between the third reversal valve, the second throttle orifice is equipped in the side of the principal pressure overflow valve；It is described
Third throttle orifice is equipped between second reversal valve and third oil circuit.
Preferably, it is equipped with pressure test at first oil circuit, the second oil circuit, third oil circuit.
Preferably, first reversal valve is three position four-way directional control valve；Second reversal valve and third reversal valve are two
Four-way reversing valve.
Preferably, the speed-up cylinder includes a cylinder body, and First piston bar is equipped in the plunger shaft of the cylinder body；In the cylinder body
Top be equipped with a upper press cover, the lower part of the cylinder body be equipped with a lower cover.
Preferably, further include second piston bar, the top of the second piston bar connects with the upper press cover；Described second
Piston rod stretches in the hollow cavity that the First piston bar opens up；One and upper press cover hydraulic fluid port are offered in the second piston bar
The asphalt channel communicated；The implementation of port communicated with the plunger shaft is offered in the side of the upper press cover.
Preferably, a prefill valve is equipped on the inside of the implementation of port.
The utility model has the advantages that：
1) existing electric machine of numerically controlled machine is common threephase asynchronous (rotating speed is specified), and double servo-pump control hydraulic pressure
The motor of system is servo motor (rotating speed is adjustable), since rotating speed is adjustable, can not only improve working efficiency, can also save electricity
Can, and servo motor is used in the utility model, noise is less than common threephase asynchronous machine, to reach noise reduction
Effect, since hydraulic oil temperature is controllable, so hydraulic pressure life of oil lengthens, to achieve the effect that environmental protection；
2) existing hydraulic system principal pressure be by electric proportional pressure control valve, hand adjustment overflow valve, inserted valve co- controlling, and it is double
Servo-pump control hydraulic system only needs a hand adjustment overflow valve cooperation servo motor that can complete the control to principal pressure, needs
Different bending power can be realized by digital control system, servo-driver to adjust the torque of servo motor, to make hydraulic pressure
System controls more intelligent, more optimized structure, cost performance higher；
3) reversal valve of existing numerical control hydraulic system (valve control) is electric proportional reversing valve, and digital control system will export simulation letter
Number the openings of sizes of electric proportional reversing valve is controlled, controls the synchronization accuracy of numerically-controlled machine tool, the size being open in this way must cause
Throttling, generates unnecessary energy loss, causes oil temperature to increase and accelerates.And the reversal valve of double servo-pump control systems is conventional changes
To valve, openings of sizes need not be adjusted, it is only necessary to which the electric or dead electricity signal that obtains that digital control system provides solenoid directional control valve completes commutation
It adjusts, the size of flow needed for system is controlled by servo motor rotating speed and quantitative oil pump, at this point, digital control system can be according to different works
Condition determines the rotating speed of servo motor, adjust needed for hydraulic fluid flow rate size, avoid flow restriction loss；
4) oil cylinder is conventional piston cylinder in existing numerically-controlled machine tool hydraulic system, in the fast lower operating mode of lathe, Quan Yi
Under the dead weight of slide plate is fast, and the oil cylinder of this double servo-pump control hydraulic system is speedup piston cylinder, compared to conventional piston cylinder, lathe
During fast lower, other than slide plate is conducted oneself with dignity, there are one speed-up cylinders, slide plate can be accelerated to glide under the action of pressure oil,
High-speed smooth operation is realized, to improve production efficiency.
Description of the drawings
Fig. 1 is the structural schematic diagram of the utility model；
Fig. 2 is the sectional view of speed-up cylinder in the utility model；
Fig. 3 is that solenoid valve obtains electric sequence list in the utility model.
Specific implementation mode
In order to make technological means, technical characteristic, purpose of utility model and technique effect of the utility model be easy to bright
It is white to understand, with reference to being specifically illustrating, the utility model is expanded on further.
It is a kind of double electro-hydraulic numerical control Synchronous Bending machine hydraulic systems of servo-pump control of the utility model as shown in Figure 1, including
One fuel tank 1, the servopump 2 to connect with the fuel tank 1 and the driving servopump 2 extract the hydraulic oil in the fuel tank 1 out
Servo motor 3.
The utility model further includes speed-up cylinder 4, oil return line 5, the first oil circuit 6, the second oil circuit 7 and third oil circuit 8.
The oil return line 5 is equipped with prefill valve 51, and one end of the oil return line 5 is connect with the speed-up cylinder 4, other end connection
Fuel tank 1；First oil circuit 6 is equipped with the first reversal valve 61, which is three position four-way directional control valve；First oil
The one end on road 6 connects with the speed-up cylinder 4, and the other end connects fuel tank 1.It is equipped on first oil circuit 6 and is used for detecting system
The M mouths of principal pressure are equipped with the M1 mouths of detection cylinder upper cavity oil pressure and for detecting cavity pressure under oil cylinder in the third oil circuit 8
M2 mouthfuls.
Described second oil circuit, 7 one end connects with the speed-up cylinder 4, and the other end connects with first reversal valve 61, in institute
State the second oil circuit 7 equipped with fast lower valve 71, with 71 concatenated overflow valve 72 of the fast lower valve, the list in parallel with the overflow valve 72
To valve 73 and the counterbalance valve 74 in parallel with the fast lower valve 71.
One end of the third oil circuit 8 connects with first oil circuit, 6 and second oil circuit 7, the other end and 1 phase of the fuel tank
It connects, safety valve 81 is equipped on the third oil circuit 8, the M2 mouths for detecting cavity pressure under oil cylinder are connected at the safety valve 81.
The second reversal valve 82 is equipped between the third oil circuit 8 and oil return line 5；Between the oil return line 5 and the first oil circuit 6
It is connected with third reversal valve 83, the second reversal valve 82 and third reversal valve 83 are two position and four-way reversing valves.The i.e. described third is changed
Connected to one end of valve 83 with first oil circuit 6 by two branches, the other end connects with the prefill valve 51.Described second changes
Connect to valve 82 with a wherein branch for the first oil circuit 6.
First segment discharge orifice 91 is equipped between the prefill valve 51 and the third reversal valve 83；First oil circuit 6 with
It is equipped with principal pressure overflow valve 610 between the third reversal valve 83, the second throttling is equipped in the side of the principal pressure overflow valve 610
Hole 92；Third throttle orifice 93 is equipped between second reversal valve 82 and third oil circuit 8.
Such as Fig. 2, the speed-up cylinder 4 for being the utility model includes a cylinder body 101, and first is equipped in the cylinder piston chamber 102
Piston rod 103；It is equipped with a upper press cover 104 at the top of the cylinder body 101, a lower cover 105 is equipped in the lower part of the cylinder body 101.
The threaded hole and ball-type 106 to connect with bender slide plate there are one being opened up in the bottom of the bottom of the First piston bar 103.
Cylinder body 101 in the present embodiment is rectangular, or it is round, difference may be selected according to requirements such as bender types
Cylinder body shape.It is equipped with a recess 107 in the outside of the cylinder body 101, for being mutually clamped with bender body.
The utility model further includes second piston bar 201, the top of the second piston bar 201 and the upper press cover 104
Connect；The second piston bar 201 stretches in the hollow cavity 202 that the First piston bar 103 opens up.
An asphalt channel 203 communicated with upper press cover hydraulic fluid port 108 is offered in the second piston bar 201；Described
The side of upper press cover 104 offers the implementation of port 204 communicated with the plunger shaft 102, and one is equipped in 204 inside of the implementation of port
Prefill valve 205.
It the following is the operation principle of the utility model speed-up cylinder：
Under fast：First piston bar is connected with the slide plate of bender, and after motor pump startup, pressure oil controls filling liquid
Valve opens prefill valve, conducts oneself with dignity by slide plate downward, and oil suction is carried out to the epicoele of plunger shaft, realizes fast lower action, at the same time,
Pressure oil leads to the hydraulic fluid port of second piston bar by reversal valve, and oil is led into second piston bar, is equivalent to oil cylinder and conducts oneself with dignity in slide plate
In the state of, it is subject to thrust, known to mechanics law, oil cylinder can accelerate downlink, to realize the effect under slide plate acceleration soon.
Work into：Speed-up cylinder work into during, the effective forced area of epicoele of plunger shaft be consist of two parts it is i.e. living
Fill in the epicoele and second piston bar of chamber.Forced area will not be changed because of the structural modification of oil cylinder, so in identical pressure oil
Under effect, bending power is constant.
Return：Pressure oil leads to the cavity of resorption of plunger shaft, the epicoele of plunger shaft and the hydraulic pressure of second piston bar by reversal valve
Oil returns to fuel tank by reversal valve.
With reference to figure 3, electric sequence list, a working cycles point 6 of the utility model are obtained for solenoid valve in the utility model
Operating mode, it is specific as follows：
Under fast：Fast lower valve 71, the first reversal valve 61 obtain electric.Servo motor 3 drives servopump 2 to rotate, the oil suction of servopump 2
Mouth is connect with fuel tank 1, and principal pressure oil flows to the P-of the first reversal valve 61 in the case where being not above principal pressure overflow valve 610
B flows to the speed-up cylinder of oil cylinder from B mouthfuls, accelerates oil cylinder and descends speed soon；Oil cylinder cavity of resorption hydraulic fluid port is by overflow valve 72, fast lower valve 71, the
The A mouths-T mouthfuls of one reversal valve 61 flow back to fuel tank.
P-B that pressure oil branch flows through third reversal valve 83 simultaneously opens prefill valve 51, oil cylinder is increasing to prefill valve 51
Under the action of fast cylinder 4, be emptied from 1 fast absorbing oil of fuel tank by slide plate gravity, flow through prefill valve 51, to reach lathe quickly to
Under effect.
Work into：First reversal valve 61, the second reversal valve 82, third reversal valve 83 obtain electric.Two branches of pressure oil：First
Item flows to P-B of the first reversal valve 61, from the B mouthfuls of speed-up cylinders for flowing to oil cylinder 4, continues to play suppression；Article 2 flows to
Two reversal valves 82, the epicoele through P-B-oil cylinders, start work into；The cavity of resorption of oil cylinder flows to the first reversal valve 61 through counterbalance valve 74
A-T mouthfuls, finally flow to fuel tank 1.
Pressurize：It is the same into action with work, it need to only adjust the rotating speed realization pressurize of servo motor 3.
Off-load：All solenoid directional control valves entirely must not be electric, and pressure oil only flows through third reversal valve 83, first segment discharge orifice 91, fills
Liquid valve 51 opens prefill valve 51, so that cylinder upper cavity oil is communicated with fuel tank 1, pressure oil flows back to fuel tank 1.The pressure oil of speed-up cylinder 4 at this time
B-T mouth oil return boxes through the second reversal valve 82, have just reached off-load operating mode at this time.
Return：First reversal valve 61 obtains electric.Pressure oil is still divided to two branches at this time：First pressure oil only flows through third
Reversal valve 83, first segment discharge orifice 91, prefill valve 51 open prefill valve 51, cylinder upper cavity oil are made to be communicated with fuel tank 1；Article 2 pressure
P-A, fast lower valve 71, check valve 73, oil cylinder cavity of resorption of the oil through the first reversal valve 61, at this time cavity of resorption carried under the action of pressure oil
The rotating speed of high servo motor 3 can improve the return speed of lathe.
Stop：Solenoid directional control valve entirely must not be electric, and servo motor 3 stalls.Lathe remains static.
Speed-up cylinder employed in the utility model, in original piston rod opening up hollow cavity adds piston rod, passes through control
Hydraulic oil in liquefaction road is greatly reduced with realizing the high-speed downstream for pushing bender slide plate to piston rod during descending soon
The time of idle stroke improves the bending efficiency of bender.
It is only the utility model preferred embodiment in summary, is not used for limiting the scope of the utility model.
Equivalence changes and modification made by i.e. all contents according to present utility model application the scope of the claims, should all belong to the skill of the utility model
Art scope.
Claims (10)
1. a kind of electro-hydraulic numerical control Synchronous Bending machine hydraulic system of double servo-pump controls, including a fuel tank, watch with what the fuel tank connected
The servo motor that clothes pump and the driving servopump extract the hydraulic oil in the fuel tank out；It is characterized in that：Further include increasing
Fast cylinder, oil return line, the first oil circuit, the second oil circuit and third oil circuit；The oil return line be equipped with prefill valve, the one of the oil return line
End is connect with the speed-up cylinder, and the other end connects fuel tank；First oil circuit be equipped with the first reversal valve, the one of first oil circuit
End connects with the speed-up cylinder, and the other end connects fuel tank；Second oil circuit one end connects with the speed-up cylinder, the other end and institute
It states the first reversal valve to connect, fast lower valve, overflow valve, check valve and counterbalance valve is equipped on second oil circuit；The third
One end of oil circuit connects with first oil circuit and the second oil circuit, and the other end connects with the fuel tank, is set on the third oil circuit
There is safety valve；The second reversal valve is equipped between the third oil circuit and oil return line；It is connected between the oil return line and the first oil circuit
There is third reversal valve.
2. the electro-hydraulic numerical control Synchronous Bending machine hydraulic system of double servo-pump controls according to claim 1, it is characterised in that：It is described
Be connected on second oil circuit fast lower valve, with the concatenated overflow valve of the fast lower valve, the check valve in parallel with the overflow valve and
The counterbalance valve in parallel with the fast lower valve.
3. the electro-hydraulic numerical control Synchronous Bending machine hydraulic system of double servo-pump controls according to claim 1, it is characterised in that：It is described
Second reversal valve connects with a wherein branch for the first oil circuit.
4. the electro-hydraulic numerical control Synchronous Bending machine hydraulic system of double servo-pump controls according to claim 3, it is characterised in that：It is described
One end of third reversal valve is connected by two branches with first oil circuit, and the other end connects with the prefill valve.
5. the electro-hydraulic numerical control Synchronous Bending machine hydraulic system of double servo-pump controls according to claim 1, it is characterised in that：Institute
It states and is equipped with first segment discharge orifice between prefill valve and the third reversal valve；It is set between first oil circuit and the third reversal valve
There is principal pressure overflow valve, the second throttle orifice is equipped in the side of the principal pressure overflow valve；Second reversal valve and third oil circuit
Between be equipped with third throttle orifice.
6. the electro-hydraulic numerical control Synchronous Bending machine hydraulic system of double servo-pump controls according to claim 1, it is characterised in that：Institute
It states the first oil circuit, the second oil circuit, be equipped with pressure test at third oil circuit.
7. the electro-hydraulic numerical control Synchronous Bending machine hydraulic system of double servo-pump controls according to claim 1, it is characterised in that：It is described
First reversal valve is three position four-way directional control valve；Second reversal valve and third reversal valve are two position and four-way reversing valves.
8. the electro-hydraulic numerical control Synchronous Bending machine hydraulic system of double servo-pump controls according to claim 1, it is characterised in that：It is described
Speed-up cylinder includes a cylinder body, and First piston bar is equipped in the plunger shaft of the cylinder body；It is equipped with a upper press cover at the top of the cylinder body,
It is equipped with a lower cover in the lower part of the cylinder body.
9. the electro-hydraulic numerical control Synchronous Bending machine hydraulic system of double servo-pump controls according to claim 8, it is characterised in that：Also wrap
Second piston bar is included, the top of the second piston bar connects with the upper press cover；The second piston bar stretches to described
In the hollow cavity that one piston rod opens up；An asphalt channel communicated with upper press cover hydraulic fluid port is offered in the second piston bar；
The side of the upper press cover offers the implementation of port communicated with the plunger shaft.
10. the electro-hydraulic numerical control Synchronous Bending machine hydraulic system of double servo-pump controls according to claim 9, it is characterised in that：
A prefill valve is equipped on the inside of the implementation of port.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201721645295.3U CN207701490U (en) | 2017-11-30 | 2017-11-30 | A kind of electro-hydraulic numerical control Synchronous Bending machine hydraulic system of double servo-pump controls |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201721645295.3U CN207701490U (en) | 2017-11-30 | 2017-11-30 | A kind of electro-hydraulic numerical control Synchronous Bending machine hydraulic system of double servo-pump controls |
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| Publication Number | Publication Date |
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| CN207701490U true CN207701490U (en) | 2018-08-07 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201721645295.3U Active CN207701490U (en) | 2017-11-30 | 2017-11-30 | A kind of electro-hydraulic numerical control Synchronous Bending machine hydraulic system of double servo-pump controls |
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| CN (1) | CN207701490U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107816462A (en) * | 2017-11-30 | 2018-03-20 | 瑞铁机床（苏州）股份有限公司 | A kind of electro-hydraulic numerical control Synchronous Bending machine hydraulic system of double servo-pump controls |
| CN112096673A (en) * | 2020-09-08 | 2020-12-18 | 武汉华液传动制造有限公司 | High-precision intelligent position and volume interlocking synchronization system and use method thereof |
-
2017
- 2017-11-30 CN CN201721645295.3U patent/CN207701490U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107816462A (en) * | 2017-11-30 | 2018-03-20 | 瑞铁机床（苏州）股份有限公司 | A kind of electro-hydraulic numerical control Synchronous Bending machine hydraulic system of double servo-pump controls |
| CN112096673A (en) * | 2020-09-08 | 2020-12-18 | 武汉华液传动制造有限公司 | High-precision intelligent position and volume interlocking synchronization system and use method thereof |
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