CN108454151A

CN108454151A - A kind of energy-saving type hydraulic press

Info

Publication number: CN108454151A
Application number: CN201810115803.XA
Authority: CN
Inventors: 乔礼惠; 陆烨
Original assignee: Jiangsu Yangli Group Co Ltd
Current assignee: Jiangsu Yangli Group Co Ltd
Priority date: 2018-02-06
Filing date: 2018-02-06
Publication date: 2018-08-28
Anticipated expiration: 2038-02-06
Also published as: CN108454151B

Abstract

The present invention relates to a kind of energy-saving type hydraulic presses, the bottom centre of hydraulic die cushion is connected with hydraulic die cushion piston cylinder, the four corners of hydraulic die cushion are connected with the top of hydraulic die cushion plunger case respectively, servo pump discharge is connected with the entrance of hydraulic die cushion control oil circuit, the 11st inserted valve and the 20th inserted valve respectively, 11st inserted valve is controlled by the 8th solenoid directional control valve, and the outlet of the 11st inserted valve is connected with accumulator；The outlet of 20th inserted valve is connected with sliding block master cylinder cavity of resorption oil circuit, and the 20th inserted valve is controlled by the 16th electromagnetic ball valve, and the eight, the 16 electromagnetic ball valves are two-bit triplet solenoid directional control valve.The bottom of accumulator is connected with the entrance of the 9th inserted valve, and the outlet of the 9th inserted valve is connected with the entrance of the 8th inserted valve, and the outlet of the 8th inserted valve is connected with the main oil pipe of each hydraulic die cushion plunger case.The hydraulic press using sliding block under fast when cavity of resorption it is fuel-displaced can to accumulator carry out preacceleration inflation, can the effectively save energy, change a job under sliding block is fast into smooth transition.

Description

A kind of energy-saving type hydraulic press

Technical field

The present invention relates to a kind of hydraulic press, more particularly to a kind of energy-saving type hydraulic press belongs to machine tool control system technology neck Domain.

Background technology

The hydraulic die cushion action control of current hydraulic press all follows the control of sliding block substantially, i.e., slider of hydraulic press motion control and Hydraulic die cushion motion control shares hydraulic power unit, and pumping source is shared because existing from the point of view of action process, so sliding blocks action can only be waited to stop It could carry out the action of hydraulic die cushion after only, and be intended to can be during sliding block backhaul by many users, hydraulic die cushion can be realized together Step ejection, can reduce the time of waiting to improve production efficiency while not influencing sliding block opening speed.

According to customer requirement deliberately two groups of pumps are respectively adopted in the slide block movement of hydraulic press and hydraulic die cushion movement by some producers The operation control of stand control, i.e. sliding block is controlled by upper pumping plant, and the control up and down of hydraulic die cushion is then controlled by lower pumping plant, at two groups of pumping plants In being completely independent state, installed power is increased, increases cost of investment, causes the waste of the energy.For such case, individually The drive cylinder of hydraulic die cushion is just modified to multi-cylinder structure by producer, and usually the mode of intermediate piston cylinder+both sides plunger case, passes through Oil pump feed is to intermediate piston cylinder and then hydraulic die cushion is driven to move upwards, and periphery plunger case carries out the mode of repairing by check valve It realizes quickly ejection, all oil cylinders is given by oil pump feed again when hydraulic die cushion is moved close to upper limit, to realize full tonnage top Go out, but can wherein have quickly ejection and turn break occur when full tonnage ejection, or even will appear and fall by a small margin, ejection speed Degree conversion is unstable, is caused by only relying on negative pressure repairing deficiency in quick ejection process because of plunger case.

Invention content

It is an object of the present invention to overcome problems of the prior art, a kind of energy-saving type hydraulic press, Ke Yichong are provided Point using sliding block it is fast under when energy, realize sliding block it is fast under change a job into smooth transition.

In order to solve the above technical problems, a kind of energy-saving type hydraulic press of the invention, including sliding block 1 and hydraulic die cushion 2, sliding block 1 Top center be connected to the lower end of sliding block plunger case 1b, be arranged with sliding block master cylinder 1a at left and right sides of sliding block plunger case 1b, The piston of sliding block master cylinder 1a is connected with sliding block 1 respectively；The bottom centre of hydraulic die cushion 2 is connected with hydraulic die cushion piston cylinder 2a, liquid The four corners of pressure pad 2 are connected with the top of hydraulic die cushion plunger case 2b respectively, and the entrance of servopump B1 is connected with fuel tank, servo The outlet of pump B1 is connected with the entrance of the first check valve D1, and the outlet of the first check valve D1 controls oil circuit, the with hydraulic die cushion respectively The entrance of 11 inserted valve C11 and the entrance of the 20th inserted valve C20 are connected, the hydraulic control mouth and the 8th of the 11st inserted valve C11 The P mouths of solenoid directional control valve YV8 are connected, and the A mouths of the 8th solenoid directional control valve YV8 are connected with the entrance of the 20th inserted valve C20, and the 8th The B mouth connected tanks of solenoid directional control valve YV8, the 8th solenoid directional control valve YV8 are two four-way electromagnetic reversing valves, the 11st inserted valve The outlet of C11 is connected with accumulator AC；The outlet of 20th inserted valve C20 is connected with sliding block master cylinder cavity of resorption oil circuit G1, and the 20th The hydraulic control mouth of inserted valve C20 is connected with the A mouths of the 16th electromagnetic ball valve YV16, the P of the 16th electromagnetic ball valve YV16 Mouth is connected with the outlet of the 20th inserted valve C20, and the T mouths of the 16th electromagnetic ball valve YV16 are with the 20th inserted valve C20's Entrance is connected, and the 16th electromagnetic ball valve YV16 is two-bit triplet solenoid directional control valve.

Compared with the existing technology, the present invention achieves following advantageous effect：Hydraulic die cushion drive cylinder is using centrally located Hydraulic die cushion piston cylinder 2a and four corners install the structure of hydraulic die cushion plunger case 2b respectively so that the drawing force of hydraulic die cushion 2 is distributed Uniformly, by the cooperation of hydraulic system and electric-control system, it can also realize that the quadrangle difference of hydraulic die cushion drawing force is adjustable.It makes full use of The design feature of sliding block master cylinder 1a and sliding block plunger case 1b, when under sliding block 1 is fast, the 16th electromagnetic ball valve YV16 obtain it is electric, 20th inserted valve C20 is opened；The 8th solenoid directional control valve YV8 is obtained electric simultaneously, and the 11st inserted valve C11 is opened, sliding block master cylinder 1a Rod cavity it is fuel-displaced by sliding block master cylinder cavity of resorption oil circuit G1, the 20th inserted valve C20 and the 11st inserted valve C11 to accumulator AC into Row preacceleration inflation, on the one hand realize 1 weight of balance slide block effect, play sliding block it is fast under change a job into smooth transition, on the other hand It can fully realize that the conversion of the energy uses.

As an improvement of the present invention, the hydraulic die cushion control oil circuit includes the first to the 9th inserted valve, the bottom of accumulator AC Portion is connected with the entrance of the 9th inserted valve C9, and the outlet of the 9th inserted valve C9 is connected with the entrance of the 8th inserted valve C8, and the 8th inserts The outlet of dress valve C8 is connected with the main oil pipe of each hydraulic die cushion plunger case 2b；8th inserted valve C8 be equipped with opening regulation handle, the 9th The hydraulic control mouth of inserted valve C9 is connected with the A mouths of the 7th solenoid directional control valve YV7, and the 7th solenoid directional control valve YV7 is two four-way electromagnetics The P mouths of reversal valve, the 7th solenoid directional control valve YV7 are connected with the entrance of the 9th inserted valve C9, the T mouths of the 7th solenoid directional control valve YV7 It is connected with fuel tank.When hydraulic die cushion 2 quickly ejects, the 8th solenoid directional control valve YV8 and the 16th electromagnetic ball valve YV16 lose Electricity, the 11st inserted valve C11 and the 20th inserted valve C20 are closed；7th solenoid directional control valve YV7 obtains electric, and the 9th inserted valve C9 is beaten It opens, uninterrupted is adjusted by adjusting the opening regulation handle of the 8th inserted valve C8, the pressure oil warp stored in accumulator AC It crosses the 9th inserted valve C9 and the 8th inserted valve C8 to enter in four hydraulic die cushion plunger case 2b, realize using accumulator AC to being located at The hydraulic die cushion plunger case 2b of surrounding carries out quick repairing.To hydraulic die cushion plunger case 2b using accumulator AC when being run because of ejection Quick repairing with pressure, quickly ejection turns whereabouts, break when ejection at a slow speed for elimination so that entire ejection movement realizes steadily Transition.In conjunction with use servo-pump control technology, it can be achieved that accurate pressure and torque control, the effectively save energy.

As further improvement of the invention, the entrance of third inserted valve C3 and the 5th inserted valve C5 are unidirectional with first respectively The outlet of valve D1 is connected, the outlet of third inserted valve C3 respectively with the first inserted valve C1, the second inserted valve C2 and the 4th inserted valve The entrance of C4 is connected, and the outlet of the first inserted valve C1 is connected with the cavity of resorption of hydraulic die cushion piston cylinder 2a, the outlet of the second inserted valve C2 And the 7th the entrance of inserted valve C7 be connected respectively with the hydraulic fluid port of hydraulic die cushion plunger case 2b；The outlet of 5th inserted valve C5 is respectively with The entrance of six inserted valve C6 and the epicoele of hydraulic die cushion piston cylinder 2a are connected, and the 4th inserted valve C4, the 6th inserted valve C6 and the 7th are inserted The outlet of dress valve C7 is connected with fuel tank respectively, and the side of hydraulic die cushion 2 is equipped with hydraulic die cushion displacement sensor S1.Hydraulic die cushion pushes up soon： Hydraulic die cushion 2 quickly ejects, and while the 9th inserted valve C9 is opened, the first inserted valve C1 and third inserted valve C3 are opened, servopump The pressure oil of B1 outputs enters the cavity of resorption of hydraulic die cushion piston cylinder 2a, hydraulic pressure followed by third inserted valve C3 and the first inserted valve C1 The epicoele fluid of pad piston cylinder 2a flows back to fuel tank through the 6th inserted valve C6.Hydraulic die cushion pushes up slowly：When hydraulic die cushion displacement sensor S1 is visited It measures after hydraulic die cushion 2 rises to setting position, the 7th solenoid directional control valve YV7 dead electricity makes the 9th inserted valve C9 close, accumulator AC Stop to four hydraulic die cushion plunger case 2b repairings, the second inserted valve C2 is opened, and the pressure oil of servopump B1 outputs enters liquid simultaneously Pressure pad piston cylinder 2a and four hydraulic die cushion plunger case 2b, hydraulic die cushion 2 switch to eject at a slow speed, using the servopump B1 of small displacement Realize the ejection control of hydraulic die cushion 2.Using servopump B1 combinations hydraulic die cushion displacement sensor S1 by closing also operation control It realizes accurately controlling for 2 ejection position of hydraulic die cushion, improves the one-pass molding rate of part.Each cylinder of hydraulic die cushion is retracted：First inserted valve C1, the second inserted valve C2 are stayed open, and third inserted valve C3 is closed, and the 4th inserted valve C4 is opened, hydraulic die cushion piston cylinder 2a cavity of resorptions Fluid pass through the first inserted valve C1 and the 4th inserted valve C4 oil return boxes；The 7th inserted valve C7 is opened simultaneously, hydraulic die cushion plunger case Fluid in 2b passes through the second inserted valve C2, the 4th inserted valve C4 and the 7th inserted valve C7 oil return boxes.Hydraulic die cushion stretches, each cylinder It is forced to retract：First inserted valve C1, the second inserted valve C2 and the 4th inserted valve C4 are stayed open, and the 7th inserted valve C7 is closed, liquid The fluid of pressure pad piston cylinder 2a cavity of resorptions passes through the first inserted valve C1 and the 4th inserted valve C4 oil return boxes；In hydraulic die cushion plunger case 2b Fluid passes through the second inserted valve C2 and the 4th inserted valve C4 oil return boxes, and the power of stretching is by the 4th inserted valve C4 controls.

As further improvement of the invention, the A mouths of the hydraulic control mouth of the first inserted valve C1 and the first electromagnetic ball valve YV1 It is connected, the first electromagnetic ball valve YV1 is two-bit triplet solenoid directional control valve, and the P mouths of the first electromagnetic ball valve YV1 are inserted with first The outlet for filling valve C1 is connected, and the T mouths of the first electromagnetic ball valve YV1 are connected with fuel tank；The hydraulic control mouth of second inserted valve C2 and The A mouths of two solenoid directional control valve YV2 are connected, and the second solenoid directional control valve YV2 is two four-way electromagnetic reversing valves, the second solenoid directional control valve The P mouths of YV2 are connected with the entrance of the second inserted valve C2, and the T mouths of the second solenoid directional control valve YV2 are connected with fuel tank；Third inserted valve The hydraulic control mouth of C3 is connected with the centre exit of the first shuttle valve SF1, the first right end entrance of shuttle valve SF1 and going out for third inserted valve C3 Mouth is connected, and the left end entrance of the first shuttle valve SF1 is connected with the A of third solenoid directional control valve mouths, and third solenoid directional control valve is middle-position machine Can be the three-position four-way electromagnetic directional valve of p-type, the B mouths of third solenoid directional control valve are connected with the hydraulic control mouth of the 5th inserted valve C5；The The P mouths of three solenoid directional control valves are connected with the outlet of the 4th inserted valve C4, and the T mouths of third solenoid directional control valve are with third check valve D3's Outlet is connected, and the entrance of third check valve D3 is connected with the entrance of the 5th inserted valve C5；The B mouths and second of third solenoid directional control valve The entrance of check valve D2 is connected, and the outlet of the second check valve D2 is connected with the hydraulic control mouth of the 4th inserted valve C4, the 4th inserted valve C4 Hydraulic control mouth be also connected with fuel tank by third pressure regulator valve F3；The A mouths of third solenoid directional control valve also go out with the 4th check valve D4 Mouth is connected, and the entrance of the 4th check valve D4 is connected with the hydraulic control mouth of the 6th inserted valve C6, and the hydraulic control mouth of the 6th inserted valve C6 is also logical The 4th pressure regulator valve F4 is crossed with fuel tank to be connected；The hydraulic control mouth of 7th inserted valve C7 is connected with the B mouths of the 5th solenoid directional control valve YV5, the Five solenoid directional control valve YV5 are two four-way electromagnetic reversing valves, the T mouths of the 5th solenoid directional control valve YV5 and going out for the 7th inserted valve C7 Mouth is connected.Hydraulic die cushion pushes up soon：Hydraulic die cushion 2 quickly ejects, while the 9th inserted valve C9 is opened, the first electromagnetic ball valve YV1 Obtain electric, the first inserted valve C1 openings；The left electromagnet YV4 of third solenoid directional control valve obtains electric, third inserted valve C3 openings；Servo The pressure oil of pump B1 outputs enters the cavity of resorption of hydraulic die cushion piston cylinder 2a, liquid followed by third inserted valve C3 and the first inserted valve C1 The epicoele fluid of pressure pad piston cylinder 2a flows back to fuel tank through the 6th inserted valve C6.Hydraulic die cushion pushes up slowly：As hydraulic die cushion displacement sensor S1 It detects after hydraulic die cushion 2 rises to setting position, the 7th solenoid directional control valve YV7 dead electricity makes the 9th inserted valve C9 close, accumulator AC stops to four hydraulic die cushion plunger case 2b repairings；Second solenoid directional control valve YV2 obtain it is electric so that the second inserted valve C2 is opened, servopump The pressure oil of B1 outputs switchs to eject at a slow speed into hydraulic die cushion piston cylinder 2a and four hydraulic die cushion plunger case 2b, hydraulic die cushion 2 simultaneously, The ejection control of hydraulic die cushion 2 can be realized using the servopump B1 of small displacement.Using servopump B1 combination hydraulic die cushion displacement sensings Device S1 can realize accurately controlling for 2 ejection position of hydraulic die cushion by closing also operation control, improve the one-pass molding rate of part.Liquid Each cylinder of pressure pad is retracted：First electromagnetic ball valve YV1 and the second solenoid directional control valve YV2 are kept as electricity, make the first inserted valve C1 and Second inserted valve C2 is stayed open；The right electromagnet YV3 of third solenoid directional control valve obtain it is electric make third inserted valve C3 close；4th inserts Dress valve C4 is opened because of hydraulic control mouth release, and the fluid of hydraulic die cushion piston cylinder 2a cavity of resorptions passes through the first inserted valve C1 and the 4th inserted valve C4 oil return boxes；Simultaneously the 5th solenoid directional control valve YV5 obtain it is electric so that the 7th inserted valve C7 is opened, the fluid warp in hydraulic die cushion plunger case 2b Cross the second inserted valve C2, the 4th inserted valve C4 and the 7th inserted valve C7 oil return boxes.Hydraulic die cushion stretches, and each cylinder is forced to retract：The One electromagnetic ball valve YV1, the second solenoid directional control valve YV2 are kept as electricity, and the first inserted valve C1 and the second inserted valve C2 is made to keep It opens；Right electromagnet YV3 dead electricity makes third solenoid directional control valve return to middle position, and the 4th inserted valve C4 is stayed open；5th electromagnetism changes The 7th inserted valve C7 is set to close to valve YV5 dead electricity, the fluid of hydraulic die cushion piston cylinder 2a cavity of resorptions passes through the first inserted valve C1 and the 4th Inserted valve C4 oil return boxes；Fluid in hydraulic die cushion plunger case 2b passes through the second inserted valve C2 and the 4th inserted valve C4 oil return boxes, draws The power stretched is controlled by the third pressure regulator valve F3 of the 4th inserted valve C4.

As further improvement of the invention, main oil pump export pipeline G2 is inserted with the 13rd inserted valve C13, the 14th respectively The entrance for filling valve C14 and the 15th inserted valve C15 is connected, the outlet of the 13rd inserted valve C13 and entering for the 12nd inserted valve C12 Mouth is connected, and the outlet of the 12nd inserted valve C12 is connected with the epicoele of sliding block plunger case 1b and sliding block master cylinder 1a；15th inserting The outlet of valve C15 is inserted with the 16th inserted valve C16, the 17th inserted valve C17, the 18th inserted valve C18 and the 19th respectively The entrance of valve C19 is connected, and the outlet of the 18th inserted valve C18 is connected with sliding block master cylinder cavity of resorption oil circuit G1, the 14th inserted valve The outlet of C14, the 16th inserted valve C16, the 17th inserted valve C17 and the 19th inserted valve C19 are connected with fuel tank respectively.Sliding block Under level-one is fast：13rd inserted valve C13 is opened, and fluid fills into sliding block master through the 13rd inserted valve C13 and the 12nd inserted valve C12 The epicoele and sliding block plunger case 1b of cylinder 1a；16th inserted valve C16, the 17th inserted valve C17 and the 18th inserted valve C18 are beaten It opens；19th inserted valve C19 supports；20th inserted valve C20 is opened, and the 11st inserted valve C11 is opened, sliding block master cylinder 1a rod cavities It is fuel-displaced accumulator AC is carried out by sliding block master cylinder cavity of resorption oil circuit G1, the 20th inserted valve C20 and the 11st inserted valve C11 it is pre- Pressurising.Under sliding block two level is fast：Remaining is remained unchanged, and the 16th inserted valve C16 is closed, and prepares to descend transition slowly to sliding block.Sliding block is slow Under：Remaining is remained unchanged, and the 20th inserted valve C20 is closed, and sliding block master cylinder cavity of resorption oil circuit G1 terminates the preacceleration inflation of accumulator AC； Continued from servopump B1 to accumulator AC pressurisings by the 11st inserted valve C11, after the completion of pressurising, the 11st inserted valve C11 and 17th inserted valve C17 is closed, and is prepared to enter into sliding block work into pressurization.Sliding block work is into pressurization：The support force of sliding block master cylinder 1a cavity of resorptions By the 19th inserted valve C19 controls.Pressure release after sliding block pressurize：13rd inserted valve C13, the 18th inserted valve C18 and the 19th Inserted valve C19 is closed, remaining inserted valve is kept.Sliding block backhaul：14th inserted valve C14 is closed, and main oil pump export pipeline G2 is built Pressure；15th inserted valve C15 is opened, and the pressure oil of main oil pump export pipeline G2 by the 15th inserted valve C15 and pushes the tenth open Eight inserted valve C18 enter the cavity of resorption of sliding block master cylinder 1a.

As further improvement of the invention, the A of the hydraulic control mouth and the 9th solenoid directional control valve YV9 of the 13rd inserted valve C13 Mouth is connected, and the P mouths of the 9th solenoid directional control valve YV9 are connected with the entrance of the 13rd inserted valve C13, the T of the 9th solenoid directional control valve YV9 Mouth is connected with fuel tank；The hydraulic control mouth of 14th inserted valve C14 is connected with the B mouths of the tenth solenoid directional control valve YV10；15th inserting The hydraulic control mouth of valve C15 is connected with the centre exit of the second shuttle valve SF2, the left entry and the 15th inserted valve C15 of the second shuttle valve SF2 Outlet be connected, the right entry of the second shuttle valve SF2 is connected with the A mouths of the 11st solenoid directional control valve YV11, the 11st electromagnetic switch The P mouths of valve YV11 are connected with the entrance of the 15th inserted valve C15；The hydraulic control mouth of 16th inserted valve C16 is changed with the 12nd electromagnetism It is connected to the A mouths of valve YV12, the P mouths of the 12nd solenoid directional control valve YV12 are connected with the entrance of the 16th inserted valve C16；17th The hydraulic control mouth of inserted valve C17 is connected with the A mouths of the 13rd solenoid directional control valve YV13, the P mouths of the 13rd solenoid directional control valve YV13 with The entrance of 17th inserted valve C17 is connected；The A of the hydraulic control mouth and the 14th electromagnetic ball valve YV14 of 18th inserted valve C18 Mouth is connected, and the P mouths of the 14th electromagnetic ball valve YV14 are connected with the outlet of the 18th inserted valve C18；18th inserted valve C18 Hydraulic control mouth be connected with the A mouths of the 15th solenoid directional control valve YV15, pass through the 9th pressure regulator valve F9 and the 15th solenoid directional control valve The P mouths of YV15 are connected, and are connected with the B mouths of the 15th solenoid directional control valve YV15 by the tenth pressure regulator valve F10；Tenth solenoid directional control valve YV10, the 11st solenoid directional control valve YV11, the 12nd solenoid directional control valve YV12, the electricity of the 13rd solenoid directional control valve YV13 and the 14th The T mouths of magnetic reversing globe valve YV14 are connected with fuel tank respectively, and the B mouths of the 15th solenoid directional control valve YV15 are connected with fuel tank；14th Electromagnetic ball valve YV14 is two-bit triplet solenoid directional control valve, and the solenoid directional control valve of the ten, the 11,12,13 and 15 is Two four-way electromagnetic reversing valves.Under sliding block level-one is fast：9th solenoid directional control valve YV9 obtain it is electric so that the 13rd inserted valve C13 is opened, oil Liquid fills into the epicoele and sliding block plunger case 1b of sliding block master cylinder 1a through the 13rd inserted valve C13 and the 12nd inserted valve C12；12nd Solenoid directional control valve YV12 obtain it is electric so that the 16th inserted valve C16 is opened, the 13rd solenoid directional control valve YV13, which is obtained, electric makes the 17th inserting Valve C17 is opened, and the 14th electromagnetic ball valve YV14, which is obtained, electric makes the 18th inserted valve C18 open；15th solenoid directional control valve YV15 obtains the electric support for making the 19th inserted valve C19 obtain the 9th pressure regulator valve F9；16th electromagnetic ball valve YV16 obtains electric make 20th inserted valve C20 is opened, and the 8th solenoid directional control valve YV8 obtains electric, the 11st inserted valve C11 openings, sliding block master cylinder 1a rod cavities It is fuel-displaced accumulator AC is carried out by sliding block master cylinder cavity of resorption oil circuit G1, the 20th inserted valve C20 and the 11st inserted valve C11 it is pre- Pressurising.Under sliding block two level is fast：Remaining is remained unchanged, and the 12nd solenoid directional control valve YV12 dead electricity makes the 16th inserted valve C16 close, Prepare to descend transition slowly to sliding block.Under sliding block is slow：Remaining is remained unchanged, and the 16th electromagnetic ball valve YV16 dead electricity makes the 20th to insert It fills valve C20 to close, sliding block master cylinder cavity of resorption oil circuit G1 terminates the preacceleration inflation of accumulator AC；11st inserting is passed through by servopump B1 Valve C11 continues to accumulator AC pressurisings, and after the completion of pressurising, the 8th solenoid directional control valve YV8 dead electricity, the 11st inserted valve C11 is closed It closes, the 13rd solenoid directional control valve YV13 dead electricity makes the 17th inserted valve C17 close, and is prepared to enter into sliding block work into pressurization.Sliding block work Into pressurization：The support force of sliding block master cylinder 1a cavity of resorptions passes through the 9th pressure regulator valve F9 controls by the 19th inserted valve C19.Sliding block pressurize Pressure release afterwards：9th solenoid directional control valve YV9 dead electricity makes the 13rd inserted valve C13 close, the 14th electromagnetic ball valve YV14 dead electricity The 18th inserted valve C18 is set to close, the 15th solenoid directional control valve YV15 dead electricity makes the 19th inserted valve C19 close, remaining each electricity Magnetic reversal valve is held in power failure state.Sliding block backhaul：Tenth solenoid directional control valve YV10, which is obtained, electric makes the 14th inserted valve C14 close It closes, main oil pump export pipeline G2 builds pressure；11st solenoid directional control valve YV11 obtains electric, the 15th inserted valve C15 openings；Main oil pump goes out The pressure oil of mouthful pipeline G2 is by the 15th inserted valve C15 and pushes the 18th inserted valve C18 open and enters under sliding block master cylinder 1a Chamber；Reverberation matrix method is by the tenth pressure regulator valve F10 controls；Prefill valve control oil pipe G3 builds pressure, each prefill valve CF1 is opened, sliding block master cylinder The fluid of 1a epicoeles and the fluid of sliding block plunger case 1b pass through prefill valve CF1 oil return boxes respectively.

As further improvement of the invention, the epicoele of hydraulic die cushion piston cylinder 2a is connected with the outlet of the 5th check valve D5, The entrance of 5th check valve D5 is connected with fuel tank；The outlet of servopump B1 is connected with the entrance of the tenth inserted valve C10, the tenth inserting The hydraulic control mouth of valve C10 is connected with the B mouths of the 6th solenoid directional control valve YV6, the outlet of the tenth inserted valve C10 and the 6th solenoid directional control valve The T mouths of YV6 are connected with fuel tank, and the 6th solenoid directional control valve YV6 is two four-way electromagnetic reversing valves.When hydraulic die cushion downlink, the Five check valve D5 are inhaled out, and the fluid in fuel tank enters the epicoele of hydraulic die cushion piston cylinder 2a through the 5th check valve D5.When the 6th electricity When magnetic reversal valve YV6 dead electricity, the tenth inserted valve C10 is opened, and the fluid of the outlets servopump B1 is followed through the tenth inserted valve C10 oil return boxes Ring；When hydraulic die cushion pushes up soon, the 6th solenoid directional control valve YV6 obtains electric, the tenth inserted valve C10 closings, the outlet oil circuit of servopump B1 Pressure is built, the hydraulic control mouth of the tenth inserted valve C10 ensures the operational safety of servopump B1 by the 6th pressure regulator valve F6 controls.Work as hydraulic die cushion It stretches, when each cylinder is forced to retract, the 6th solenoid directional control valve YV6 returns to power failure state, and the tenth inserted valve C10 is opened.

As further improvement of the invention, the servo motor M1 and each solenoid directional control valve of servopump B1 are controlled by control System, the control system include PLC controller and servo controller SDR, and accumulator AC and the 11st inserted valve C11 export it Between pipeline on be connected with pressure switch H1, the hydraulic pressure of the signal output end access PLC controller of hydraulic die cushion displacement sensor S1 The high-pressure closing normally open contact H1-1 of pad displacement signal input terminal IN1, pressure switch H1 are connected on the high-voltage signal of PLC controller Between 000 port of input terminal and DC power cathode VDC-, the low pressure of pressure switch H1 disconnects normally closed interlock H1-2 and is connected on PLC Between 001 port of low-voltage signal input terminal of controller and DC power cathode VDC-；The high-low pressure switching letter of PLC controller Number 002 port of output end is connected with the servopump switching signal input terminal MC of servo controller SDR；The flow of PLC controller increases Plus signal output end OUT1 increases signal input part AI3 with the flow of servo controller SDR and is connected, and the flow of PLC controller subtracts Small signal output end COM1 reduces signal input part FAC3 with the flow of servo controller SDR and is connected；The pressure of PLC controller increases Plus signal output end OUT2 increases signal input part AI2 with the pressure of servo controller SDR and is connected, and the pressure of PLC controller subtracts Small signal output end COM2 reduces signal input part FAC2 with the pressure of servo controller SDR and is connected；Servo enables button SB1 and connects It is connected between the enabling signal input terminal DI3 of servo controller SDR and common end COM；Detect the pump of servopump B1 output pressures Mouth pressure sensor P1 is connected with the servopump pressure signal input end AI1 of servo controller SDR.It presses servo and enables button SB1, servo controller SDR devote oneself to work.When under sliding block is fast, the fuel-displaced of sliding block master cylinder 1a rod cavities carries out preliminary filling to accumulator AC Pressure is continued from servopump B1 to accumulator AC pressurisings after sliding block turns slow lower, until the high-pressure closing normally open contact of pressure switch H1 H1-1 is closed, and the signal that accumulator AC is reached to high pressure is input to 000 port of high-voltage signal input terminal of PLC controller, PLC Controller makes the 8th solenoid directional control valve YV8 dead electricity, the 11st inserted valve C11 close, and is prepared to enter into sliding block work into pressurization.Hydraulic pressure When pad 2 quickly ejects, the pressure oil stored in accumulator AC quickly fills into four hydraulic die cushion plunger case 2b.Hydraulic die cushion pushes up slowly When, when hydraulic die cushion displacement sensor S1 is detected, hydraulic die cushion 2 rises to setting position or accumulator AC is reduced to low pressure, pressure The low pressure of switch H1 disconnects normally closed interlock H1-2 and disconnects, and PLC controller makes the 7th solenoid directional control valve YV7 dead electricity, the 9th inserted valve C9 is closed, and accumulator AC stops to four hydraulic die cushion plunger case 2b repairings；Second solenoid directional control valve YV2, which is obtained, electric makes the second inserted valve C2 is opened, and the pressure oil of servopump B1 outputs enters hydraulic die cushion piston cylinder 2a and four hydraulic die cushion plunger case 2b, hydraulic die cushion 2 simultaneously Switch to eject at a slow speed.Hydraulic die cushion can be realized by closing also operation control using servopump B1 combinations hydraulic die cushion displacement sensor S1 2 ejection positions accurately control, and improve the one-pass molding rate of part.Servopump B1 includes being driven by the same servo motor M1 Low-lift pump and high-pressure pump, when hydraulic die cushion pushes up soon and hydraulic die cushion pushes up slowly, the high-low pressure switching signal output end 002 of PLC controller The servopump switching signal input terminal MC of servopump B1 low pressure operation signals input servo controller SDR is kept servo electric by port Machine M1 drives low pressure pump operation.When each cylinder of hydraulic die cushion is retracted, 002 port of high-low pressure switching signal output end of PLC controller By the servopump switching signal input terminal MC of servopump B1 high-voltage operation signals input servo controller SDR, make servo motor M1 Drive high pressure pump operation.It is watched when flow increase analog signal is sent to by the flow increase signal output end OUT1 of PLC controller When taking the flow increase signal input part AI3 of controller SDR, servo motor M1 control servopumps B1 increases flow output.Work as PLC The flow that flow reduction analog signal is sent to servo controller SDR by the flow reduction signal output end COM1 of controller subtracts When small signal input part FAC3, servo motor M1 control servopumps B1 reduces flow output.When the pressure of PLC controller increases The pressure that pressure increase analog signal is sent to servo controller SDR by signal output end OUT2 increases signal input part AI2 When, servo motor M1 control servopumps B1 improves oil pressure.When the pressure of PLC controller reduces signal output end COM2 by pressure When the pressure that reduction analog signal is sent to servo controller SDR reduces signal input part FAC2, servo motor M1 controls servo Pumping B1 reduces oil pressure.

As further improvement of the invention, each working cycles of hydraulic press include following action successively：(1) sliding block one Under grade is fast：13rd inserted valve C13 is opened, and fluid fills into the epicoele and sliding block plunger case 1b of sliding block master cylinder 1a；11st inserting Valve C11, the 16th inserted valve C16, the 17th inserted valve C17, the 18th inserted valve C18 and the 20th inserted valve C20 are opened, sliding The fuel-displaced of block master cylinder 1a rod cavities carries out preacceleration inflation to accumulator AC；(2) under sliding block two level is fast：12nd solenoid directional control valve YV12 loses Electricity makes the 16th inserted valve C16 close；(3) under sliding block is slow：20th inserted valve C20 is closed, and the preacceleration inflation of accumulator AC terminates； Continued from servopump B1 to accumulator AC pressurisings, the 11st inserted valve C11 and the 17th inserted valve C17 are closed after the completion of pressurising； (4) sliding block work is into pressurization：The support force of sliding block master cylinder 1a cavity of resorptions is by the 9th pressure regulator valve F9 controls；(5) pressure release after sliding block pressurize：The 13 inserted valve C13, the 18th inserted valve C18 and the 19th inserted valve C19 are closed, remaining each solenoid directional control valve is held in mistake Electricity condition；(6) sliding block backhaul：14th inserted valve C14 is closed, and the 15th inserted valve C15 is opened, main oil pump export pipeline G2's Pressure oil enters the cavity of resorption of sliding block master cylinder 1a；Reverberation matrix method is by the tenth pressure regulator valve F10 controls；Each prefill valve CF1 is opened, sliding block master The fluid of cylinder 1a epicoeles and sliding block plunger case 1b pass through prefill valve CF1 oil return boxes respectively.The hydraulic press using sliding block it is fast under when bar The fuel-displaced of chamber carries out preacceleration inflation to accumulator AC, can the effectively save energy.

As further improvement of the invention, each working cycles of hydraulic press also include following action successively：(7) hydraulic pressure The fast top of pad：11st inserted valve C11 and the 20th inserted valve C20 are closed, and the 9th inserted valve C9 is opened, the pressure in accumulator AC Oil quickly fills into four hydraulic die cushion plunger case 2b；The first inserted valve C1, third inserted valve C3 are opened simultaneously, and servopump B1 is defeated The pressure oil gone out enters the cavity of resorption of hydraulic die cushion piston cylinder 2a, and the epicoele fluid of hydraulic die cushion piston cylinder 2a is through the 6th inserted valve C6 streams Oil return box；(8) hydraulic die cushion pushes up slowly：After hydraulic die cushion 2 rises to setting position, the 9th inserted valve C9 is closed, accumulator AC stop to Four hydraulic die cushion plunger case 2b repairings；Second inserted valve C2 is opened, and the pressure oil of servopump B1 outputs is lived into hydraulic die cushion simultaneously Plug cylinder 2a and four hydraulic die cushion plunger case 2b；(9) each cylinder of hydraulic die cushion is retracted：Third inserted valve C3 is closed, the 4th inserted valve C4 and the Seven inserted valve C7 are opened, the fluid oil return box in the fluid and hydraulic die cushion plunger case 2b of hydraulic die cushion piston cylinder 2a cavity of resorptions；(10) hydraulic pressure Pad stretches, and each cylinder is forced to retract：Third solenoid directional control valve returns to middle position, and the 7th inserted valve C7 is closed, hydraulic die cushion piston cylinder 2a The power of fluid oil return box in cavity of resorption and hydraulic die cushion plunger case 2b, stretching is controlled by third pressure regulator valve F3.It is quickly pushed up in hydraulic die cushion When going out, using accumulator AC to four quick repairings of hydraulic die cushion plunger case 2b, and eliminates quickly ejection and turn to eject at a slow speed at present It falls, break so that entire ejection movement realizes smooth transition.

Description of the drawings

The present invention will be further described in detail below with reference to the accompanying drawings and specific embodiments, attached drawing only provide with reference to Illustrate to use, it is non-limiting the present invention.

Fig. 1 is the hydraulic scheme of energy-saving type hydraulic press of the present invention.

Fig. 2 is the enlarged drawing of hydraulic pressure mattress system in Fig. 1.

Fig. 3 is the enlarged drawing of slip bocks system in Fig. 1.

Fig. 4 is the electric control theory figure of energy-saving type hydraulic press of the present invention.

In figure：1. sliding block；1a. sliding block master cylinders；1b. sliding block plunger cases；2. hydraulic die cushion；2a. hydraulic die cushion piston cylinders；2b. liquid Pressure pad plunger case；B1. servopump；M1. servo motor；AC. accumulator；C1. third inserted valve；C2. the second inserted valve；C3. Three inserted valves；C4. the 4th inserted valve；C5. the 5th inserted valve；C6. the 6th inserted valve；C7. the 7th inserted valve；C8. the 8th inserting Valve；C9. the 9th inserted valve；C10. the tenth inserted valve；C11. the 11st inserted valve；C12. the 12nd inserted valve；C13. the ten three Inserted valve；C14. the 14th inserted valve；C15. the 15th inserted valve；C16. the 16th inserted valve；C17. the 17th inserted valve； C18. the 18th inserted valve；C19. the 19th inserted valve；C20. the 20th inserted valve；CF1. prefill valve；D1. the first check valve； D2. the second check valve；D3. third check valve；D4. the 4th check valve；D5. the 5th check valve；H1. pressure switch；YV1. first Electromagnetic ball valve；YV2. the second solenoid directional control valve；YV3, YV4. third solenoid directional control valve；YV5. the 5th solenoid directional control valve； YV6. the 6th solenoid directional control valve；YV7. the 7th solenoid directional control valve；YV8. the 8th solenoid directional control valve；YV9. the 9th solenoid directional control valve； YV10. the tenth solenoid directional control valve；YV11. the 11st solenoid directional control valve；YV12. the 12nd solenoid directional control valve；YV13. the 13rd electricity Magnetic reversal valve；YV14. the 14th electromagnetic ball valve；YV15. the 15th solenoid directional control valve；YV16. the 16th electromagnetic switch ball Valve；G1. sliding block master cylinder cavity of resorption oil circuit；G2. main oil pump export pipeline；G3. prefill valve control oil pipe；SF1. the first shuttle valve；SF2. Second shuttle valve；S1. hydraulic die cushion displacement sensor；F1. the first pressure regulator valve；F2. the second pressure regulator valve；F3. third pressure regulator valve；F4. Four pressure regulator valves；F5. the 5th pressure regulator valve；F6. the 6th pressure regulator valve；F7. the 7th pressure regulator valve；F8. the 8th pressure regulator valve；F9. the 9th pressure regulation Valve；F10. the tenth pressure regulator valve；F11. the 11st pressure regulator valve；SDR. servo controller；PG. encoder；SB1. servo enables button； EM1. filter；R. braking resistor.

Specific implementation mode

As shown in Figure 1 to Figure 3, energy-saving type hydraulic press of the invention includes sliding block 1 and hydraulic die cushion 2, the top center of sliding block 1 It is connected to the lower end of sliding block plunger case 1b, sliding block master cylinder 1a, sliding block master cylinder 1a are arranged at left and right sides of sliding block plunger case 1b Piston be connected respectively with sliding block 1；The bottom centre of hydraulic die cushion 2 is connected with hydraulic die cushion piston cylinder 2a, four of hydraulic die cushion 2 Corner is connected with the top of hydraulic die cushion plunger case 2b respectively, and the entrance of servopump B1 is connected with fuel tank, the outlet of servopump B1 It is connected with the entrance of the first check valve D1, the outlet of the first check valve D1 controls oil circuit, the 11st inserted valve with hydraulic die cushion respectively The entrance of the entrance of C11 and the 20th inserted valve C20 are connected, the hydraulic control mouth and the 8th solenoid directional control valve of the 11st inserted valve C11 The P mouths of YV8 are connected, and the A mouths of the 8th solenoid directional control valve YV8 are connected with the entrance of the 20th inserted valve C20, the 8th solenoid directional control valve The B mouth connected tanks of YV8, the 8th solenoid directional control valve YV8 be two four-way electromagnetic reversing valves, the outlet of the 11st inserted valve C11 with Accumulator AC is connected；The outlet of 20th inserted valve C20 is connected with sliding block master cylinder cavity of resorption oil circuit G1, the 20th inserted valve C20's Hydraulic control mouth is connected with the A mouths of the 16th electromagnetic ball valve YV16, and the P mouths of the 16th electromagnetic ball valve YV16 are inserted with the 20th The outlet for filling valve C20 is connected, and the T mouths of the 16th electromagnetic ball valve YV16 are connected with the entrance of the 20th inserted valve C20, and the tenth Six electromagnetic ball valve YV16 are two-bit triplet solenoid directional control valve, and the 7th pressure regulator valve F7 is equipped between accumulator AC and fuel tank.

Hydraulic die cushion drive cylinder installs hydraulic pressure pad post respectively using centrally located hydraulic die cushion piston cylinder 2a and four corners The structure of plug cylinder 2b so that the drawing force of hydraulic die cushion 2 is evenly distributed, also can be real by the cooperation of hydraulic system and electric-control system The quadrangle difference of existing hydraulic die cushion drawing force is adjustable.The design feature for making full use of sliding block master cylinder 1a and sliding block plunger case 1b, in cunning When under block 1 is fast, the 16th electromagnetic ball valve YV16 obtains electric, the 20th inserted valve C20 openings；8th solenoid directional control valve simultaneously YV8 obtains electric, the 11st inserted valve C11 openings, the fuel-displaced process sliding block master cylinder cavity of resorption oil circuit G1 of sliding block master cylinder 1a rod cavities, the 20th Inserted valve C20 and the 11st inserted valve C11 carries out preacceleration inflation to accumulator AC, on the one hand realizes the effect of 1 weight of balance slide block, Play sliding block it is fast under change a job into smooth transition, on the other hand can fully realize the energy conversion use.

It includes the first to the 9th inserted valve, the entrance of the bottom of accumulator AC and the 9th inserted valve C9 that hydraulic die cushion, which controls oil circuit, It is connected, the outlet of the 9th inserted valve C9 is connected with the entrance of the 8th inserted valve C8, outlet and each hydraulic die cushion of the 8th inserted valve C8 The main oil pipe of plunger case 2b is connected；8th inserted valve C8 is equipped with opening regulation handle, the hydraulic control mouth and the 7th of the 9th inserted valve C9 The A mouths of solenoid directional control valve YV7 are connected, and the 7th solenoid directional control valve YV7 is two four-way electromagnetic reversing valves, the 7th solenoid directional control valve The P mouths of YV7 are connected with the entrance of the 9th inserted valve C9, and the T mouths of the 7th solenoid directional control valve YV7 are connected with fuel tank.In hydraulic die cushion 2 Quickly when ejection, the 8th solenoid directional control valve YV8 and the 16th equal dead electricity of electromagnetic ball valve YV16, the 11st inserted valve C11 and 20th inserted valve C20 is closed；7th solenoid directional control valve YV7 obtains electric, the 9th inserted valve C9 openings, by adjusting the 8th inserted valve The opening regulation handle of C8 adjusts uninterrupted, and the pressure oil stored in accumulator AC inserts by the 9th inserted valve C9 and the 8th Valve C8 is filled to enter in four hydraulic die cushion plunger case 2b, realize using accumulator AC to the hydraulic die cushion plunger case 2b positioned at surrounding into The quick repairing of row.Hydraulic die cushion plunger case 2b is eliminated quick using accumulator AC quick repairings with pressure when being run because of ejection It falls when ejection turns to eject at a slow speed, break so that entire ejection movement realizes smooth transition.In conjunction with using servopump Control technology is, it can be achieved that the accurately control of pressure and torque, the effectively save energy.

Third inserted valve C3 is connected with the outlet of the first check valve D1 respectively with the entrance of the 5th inserted valve C5, third inserting The outlet of valve C3 is connected with the entrance of the first inserted valve C1, the second inserted valve C2 and the 4th inserted valve C4 respectively, the first inserted valve The outlet of C1 is connected with the cavity of resorption of hydraulic die cushion piston cylinder 2a, the outlet of the second inserted valve C2 and the entrance difference of the 7th inserted valve C7 It is connected with the hydraulic fluid port of hydraulic die cushion plunger case 2b；5th inserted valve C5's exports the entrance and hydraulic die cushion with the 6th inserted valve C6 respectively The epicoele of piston cylinder 2a is connected, the outlet of the 4th inserted valve C4, the 6th inserted valve C6 and the 7th inserted valve C7 respectively with fuel tank phase Even, the side of hydraulic die cushion 2 is equipped with hydraulic die cushion displacement sensor S1, and the is equipped between the outlet and fuel tank of the first inserted valve C1 One pressure regulator valve F1, is equipped with the second pressure regulator valve F2 between the outlet and fuel tank of the second inserted valve C2.

The hydraulic control mouth of first inserted valve C1 is connected with the A mouths of the first electromagnetic ball valve YV1, the first electromagnetic ball valve YV1 is two-bit triplet solenoid directional control valve, and the P mouths of the first electromagnetic ball valve YV1 are connected with the outlet of the first inserted valve C1, first The T mouths of electromagnetic ball valve YV1 are connected with fuel tank；The A mouth phases of the hydraulic control mouth of second inserted valve C2 and the second solenoid directional control valve YV2 Even, the second solenoid directional control valve YV2 is two four-way electromagnetic reversing valves, P mouths and the second inserted valve C2 of the second solenoid directional control valve YV2 Entrance be connected, the T mouths of the second solenoid directional control valve YV2 are connected with fuel tank；The hydraulic control mouth of third inserted valve C3 and the first shuttle valve SF1 Centre exit be connected, the right end entrance of the first shuttle valve SF1 is connected with the outlet of third inserted valve C3, a left side of the first shuttle valve SF1 End entrance is connected with the A of third solenoid directional control valve mouths, and third solenoid directional control valve is that the 3-position 4-way electromagnetism that Median Function is p-type changes To valve, the B mouths of third solenoid directional control valve are connected with the hydraulic control mouth of the 5th inserted valve C5；The P mouths and the 4th of third solenoid directional control valve The outlet of inserted valve C4 is connected, and the T mouths of third solenoid directional control valve are connected with the outlet of third check valve D3, third check valve D3's Entrance is connected with the entrance of the 5th inserted valve C5；The B mouths of third solenoid directional control valve are connected with the entrance of the second check valve D2, and second The outlet of check valve D2 is connected with the hydraulic control mouth of the 4th inserted valve C4, and the hydraulic control mouth of the 4th inserted valve C4 also passes through third pressure regulator valve F3 is connected with fuel tank；The A mouths of third solenoid directional control valve are also connected with the outlet of the 4th check valve D4, the entrance of the 4th check valve D4 It is connected with the hydraulic control mouth of the 6th inserted valve C6, the hydraulic control mouth of the 6th inserted valve C6 is also connected by the 4th pressure regulator valve F4 with fuel tank； The hydraulic control mouth of 7th inserted valve C7 is connected with the B mouths of the 5th solenoid directional control valve YV5, and the 5th solenoid directional control valve YV5 is two four-ways The T mouths of solenoid directional control valve, the 5th solenoid directional control valve YV5 are connected with the outlet of the 7th inserted valve C7, the hydraulic control of the 7th inserted valve C7 Mouth is connected by the 5th pressure regulator valve F5 with fuel tank.

Main oil pump export pipeline G2 respectively with the 13rd inserted valve C13, the 14th inserted valve C14 and the 15th inserted valve The entrance of C15 is connected, and the outlet of the 13rd inserted valve C13 is connected with the entrance of the 12nd inserted valve C12, the 12nd inserted valve The outlet of C12 is connected with the epicoele of sliding block plunger case 1b and sliding block master cylinder 1a；The outlet of 15th inserted valve C15 is respectively with 16 inserted valve C16, the 17th inserted valve C17, the 18th inserted valve C18 and the 19th inserted valve C19 entrance be connected, the tenth The outlet of eight inserted valve C18 is connected with sliding block master cylinder cavity of resorption oil circuit G1, the 14th inserted valve C14, the 16th inserted valve C16, The outlet of 17 inserted valve C17 and the 19th inserted valve C19 is connected with fuel tank respectively, the hydraulic control mouth of the 14th inserted valve C14 with It is equipped with the 8th pressure regulator valve F8 between fuel tank, the 11st pressure regulator valve F11 is equipped between the outlet and fuel tank of the 18th inserted valve C18.

The hydraulic control mouth of 13rd inserted valve C13 is connected with the A mouths of the 9th solenoid directional control valve YV9, the 9th solenoid directional control valve YV9 P mouths be connected with the entrance of the 13rd inserted valve C13, the T mouths of the 9th solenoid directional control valve YV9 are connected with fuel tank；14th inserting The hydraulic control mouth of valve C14 is connected with the B mouths of the tenth solenoid directional control valve YV10；The hydraulic control mouth and the second shuttle valve of 15th inserted valve C15 The centre exit of SF2 is connected, and the left entry of the second shuttle valve SF2 is connected with the outlet of the 15th inserted valve C15, the second shuttle valve SF2 Right entry be connected with the A mouths of the 11st solenoid directional control valve YV11, the P mouths of the 11st solenoid directional control valve YV11 with the 15th inserting The entrance of valve C15 is connected；The hydraulic control mouth of 16th inserted valve C16 is connected with the A mouths of the 12nd solenoid directional control valve YV12, and the 12nd The P mouths of solenoid directional control valve YV12 are connected with the entrance of the 16th inserted valve C16；The hydraulic control mouth and the tenth of 17th inserted valve C17 The A mouths of three solenoid directional control valve YV13 are connected, the entrance phase of the P mouth and the 17th inserted valve C17 of the 13rd solenoid directional control valve YV13 Even；The hydraulic control mouth of 18th inserted valve C18 is connected with the A mouths of the 14th electromagnetic ball valve YV14, the 14th electromagnetic switch ball The P mouths of valve YV14 are connected with the outlet of the 18th inserted valve C18；The hydraulic control mouth of 18th inserted valve C18 is changed with the 15th electromagnetism It is connected to the A mouths of valve YV15, is connected with the P mouths of the 15th solenoid directional control valve YV15 by the 9th pressure regulator valve F9, is adjusted by the tenth Pressure valve F10 is connected with the B mouths of the 15th solenoid directional control valve YV15；Tenth solenoid directional control valve YV10, the 11st solenoid directional control valve The T mouths point of YV11, the 12nd solenoid directional control valve YV12, the 13rd solenoid directional control valve YV13 and the 14th electromagnetic ball valve YV14 It is not connected with fuel tank, the B mouths of the 15th solenoid directional control valve YV15 are connected with fuel tank；14th electromagnetic ball valve YV14 is two Three-way solenoid valve, the solenoid directional control valve of the ten, the 11,12,13 and 15 are two four-way electromagnetic reversing valves.

The epicoele of hydraulic die cushion piston cylinder 2a is connected with the outlet of the 5th check valve D5, the entrance and fuel tank of the 5th check valve D5 It is connected；The outlet of servopump B1 is connected with the entrance of the tenth inserted valve C10, the hydraulic control mouth and the 6th electromagnetism of the tenth inserted valve C10 The B mouths of reversal valve YV6 are connected, and the outlet of the tenth inserted valve C10 and the T mouths of the 6th solenoid directional control valve YV6 are connected with fuel tank, the Six solenoid directional control valve YV6 are two four-way electromagnetic reversing valves.When hydraulic die cushion downlink, the 5th check valve D5 is inhaled out, in fuel tank Fluid enter the epicoele of hydraulic die cushion piston cylinder 2a through the 5th check valve D5.When the 6th solenoid directional control valve YV6 dead electricity, the tenth inserts It fills valve C10 to open, the fluid of the outlets servopump B1 is recycled through the tenth inserted valve C10 oil return boxes；When hydraulic die cushion pushes up soon, the 6th electricity Magnetic reversal valve YV6 obtains electric, and the tenth inserted valve C10 is closed, and the outlet oil circuit of servopump B1 builds pressure, the hydraulic control of the tenth inserted valve C10 Mouth ensures the operational safety of servopump B1 by the 6th pressure regulator valve F6 controls.When hydraulic die cushion stretches, and each cylinder is forced to retract, the Six solenoid directional control valve YV6 return to power failure state, and the tenth inserted valve C10 is opened.

As shown in figure 4, the servo motor M1 and each solenoid directional control valve of servopump B1 are controlled by control system, control system Including PLC controller and servo controller SDR, it is connected on the pipeline between accumulator AC and the 11st outlets inserted valve C11 The hydraulic die cushion displacement signal input terminal of the signal output end access PLC controller of pressure switch H1, hydraulic die cushion displacement sensor S1 The high-pressure closing normally open contact H1-1 of IN1, pressure switch H1 be connected on 000 port of high-voltage signal input terminal of PLC controller with Between DC power cathode VDC-, the low pressure of pressure switch H1 disconnects the low pressure letter that normally closed interlock H1-2 is connected on PLC controller Number between 001 port of input terminal and DC power cathode VDC-；002 port of high-low pressure switching signal output end of PLC controller It is connected with the servopump switching signal input terminal MC of servo controller SDR.

The flow that the flow of PLC controller increases signal output end OUT1 and servo controller SDR increases signal input part AI3 is connected, and the flow of PLC controller reduces the flow reduction signal input part of signal output end COM1 and servo controller SDR FAC3 is connected；The pressure that the pressure of PLC controller increases signal output end OUT2 and servo controller SDR increases signal input part AI2 is connected, and the pressure of PLC controller reduces the pressure reduction signal input part of signal output end COM2 and servo controller SDR FAC2 is connected.

Servo enables button SB1 and is connected between the enabling signal input terminal DI3 of servo controller SDR and common end COM； Detect the servopump pressure signal input end of the pump intake pressure sensor P1 and servo controller SDR of servopump B1 output pressures AI1 is connected.

It presses servo and enables button SB1, servo controller SDR devotes oneself to work.When under sliding block is fast, sliding block master cylinder 1a rod cavities It is fuel-displaced that preacceleration inflation carried out to accumulator AC, sliding block turn it is slow it is lower after, continued from servopump B1 to accumulator AC pressurisings, until pressure is opened The high-pressure closing normally open contact H1-1 for closing H1 is closed, and the signal that accumulator AC is reached to high pressure is input to the height of PLC controller 000 port of signal input part, PLC controller is pressed to make the 8th solenoid directional control valve YV8 dead electricity, the 11st inserted valve C11 is closed, accurate The standby sliding block work that enters is into pressurization.

When hydraulic die cushion 2 quickly ejects, the pressure oil stored in accumulator AC quickly fills into four hydraulic die cushion plunger case 2b. When hydraulic die cushion pushes up slowly, when hydraulic die cushion displacement sensor S1 is detected, hydraulic die cushion 2 rises to setting position or accumulator AC has dropped To low pressure, the low pressure of pressure switch H1 disconnects normally closed interlock H1-2 and disconnects, and PLC controller makes the 7th solenoid directional control valve YV7 dead electricity, 9th inserted valve C9 is closed, and accumulator AC stops to four hydraulic die cushion plunger case 2b repairings；Second solenoid directional control valve YV2 obtains electric make Second inserted valve C2 is opened, and the pressure oil of servopump B1 outputs enters hydraulic die cushion piston cylinder 2a and four hydraulic die cushion plunger cases simultaneously 2b, hydraulic die cushion 2 switch to eject at a slow speed.Using servopump B1 combinations hydraulic die cushion displacement sensor S1 by closing also operation control It realizes accurately controlling for 2 ejection position of hydraulic die cushion, improves the one-pass molding rate of part.

Servopump B1 includes the low-lift pump and high-pressure pump driven by the same servo motor M1, when hydraulic die cushion pushes up and hydraulic pressure soon When pad pushes up slowly, servopump B1 low pressure operation signals are inputted servo by 002 port of high-low pressure switching signal output end of PLC controller The servopump switching signal input terminal MC of controller SDR makes servo motor M1 drive low pressure pump operation.

When each cylinder of hydraulic die cushion is retracted, 002 port of high-low pressure switching signal output end of PLC controller is by servopump B1 high The servopump switching signal input terminal MC for pressing run signal input servo controller SDR makes servo motor M1 driving high-pressure pump fortune Row.

Flow increase analog signal is sent to servo controller when the flow of PLC controller increases signal output end OUT1 When the flow of SDR increases signal input part AI3, servo motor M1 control servopumps B1 increases flow output.When PLC controller The flow reduction signal that flow reduction analog signal is sent to servo controller SDR by flow reduction signal output end COM1 is defeated When entering to hold FAC3, servo motor M1 control servopumps B1 reduces flow output.

Pressure increase analog signal is sent to SERVO CONTROL when the pressure of PLC controller increases signal output end OUT2 When the pressure of device SDR increases signal input part AI2, servo motor M1 control servopumps B1 improves oil pressure.When PLC controller The pressure reduction signal that pressure reduction analog signal is sent to servo controller SDR by pressure reduction signal output end COM2 is defeated When entering to hold FAC2, servo motor M1 control servopumps B1 reduces oil pressure.

The alarm signal input terminal 104 of PLC controller is connected with the alarm signal output ends DO3 of servo controller SDR.When When servo controller SDR detects failure, to PLC controller alarm signal input terminal 104 to sending out alarm signal, and stop Work.

AC power accesses the power end of servo controller SDR by filter EM1, and braking resistor R is connected on SERVO CONTROL The ports X4 of device SDR, the ports X3 of the encoder PG access servo controllers SDR of servo motor, PLC controller use Omron CP1H-XA40DR-A types, servo controller SDR use the NAS 4E45/81X type servos of Guilin stars Science and Technology Co., Ltd. Controller.

Each working cycles of the hydraulic press include following action successively：(1) under sliding block level-one is fast：9th solenoid directional control valve YV9 obtain it is electric so that the 13rd inserted valve C13 is opened, fluid fills into sliding block master through the 13rd inserted valve C13 and the 12nd inserted valve C12 The epicoele and sliding block plunger case 1b of cylinder 1a；12nd solenoid directional control valve YV12 obtain it is electric so that the 16th inserted valve C16 is opened, the 13rd Solenoid directional control valve YV13 obtain it is electric so that the 17th inserted valve C17 is opened, the 14th electromagnetic ball valve YV14, which is obtained, electric makes the 18th to insert Valve C18 is filled to open；15th solenoid directional control valve YV15 obtains the electric support for making the 19th inserted valve C19 obtain the 9th pressure regulator valve F9； 16th electromagnetic ball valve YV16 obtain it is electric so that the 20th inserted valve C20 is opened, the 8th solenoid directional control valve YV8 obtain it is electric, the 11st Inserted valve C11 is opened, sliding block master cylinder 1a rod cavities it is fuel-displaced by sliding block master cylinder cavity of resorption oil circuit G1, the 20th inserted valve C20 and the 11 inserted valve C11 carry out preacceleration inflation to accumulator AC.

(2) under sliding block two level is fast：Remaining is remained unchanged, and the 12nd solenoid directional control valve YV12 dead electricity makes the 16th inserted valve C16 It closes, prepares to descend transition slowly to sliding block.

(3) under sliding block is slow：Remaining is remained unchanged, and the 16th electromagnetic ball valve YV16 dead electricity makes the 20th inserted valve C20 close It closes, sliding block master cylinder cavity of resorption oil circuit G1 terminates the preacceleration inflation of accumulator AC；Continued by the 11st inserted valve C11 by servopump B1 To accumulator AC pressurisings, after the completion of pressurising, the 8th solenoid directional control valve YV8 dead electricity, the 11st inserted valve C11 is closed, the 13rd electricity Magnetic reversal valve YV13 dead electricity makes the 17th inserted valve C17 close, and is prepared to enter into sliding block work into pressurization.

(4) sliding block work is into pressurization：The support force of sliding block master cylinder 1a cavity of resorptions passes through the 9th pressure regulator valve by the 19th inserted valve C19 F9 is controlled.

(5) pressure release after sliding block pressurize：9th solenoid directional control valve YV9 dead electricity makes the 13rd inserted valve C13 close, the 14th electricity Magnetic reversing globe valve YV14 dead electricity makes the 18th inserted valve C18 close, and the 15th solenoid directional control valve YV15 dead electricity makes the 19th inserting Valve C19 is closed, remaining each solenoid directional control valve is held in power failure state.

(6) sliding block backhaul：Tenth solenoid directional control valve YV10 obtain it is electric so that the 14th inserted valve C14 is closed, main oil pump export pipeline G2 builds pressure；11st solenoid directional control valve YV11 obtains electric, the 15th inserted valve C15 openings；The pressure oil of main oil pump export pipeline G2 By the 15th inserted valve C15 and push the cavity of resorption that the 18th inserted valve C18 enters sliding block master cylinder 1a open；Reverberation matrix method is adjusted by the tenth Pressure valve F10 controls；Prefill valve control oil pipe G3 builds pressure, each prefill valve CF1 is opened, the fluid and sliding block of sliding block master cylinder 1a epicoeles The fluid of plunger case 1b passes through prefill valve CF1 oil return boxes respectively.

(7) hydraulic die cushion pushes up soon：8th solenoid directional control valve YV8 and the 16th equal dead electricity of electromagnetic ball valve YV16, the 11st inserts It fills valve C11 and the 20th inserted valve C20 is closed；7th solenoid directional control valve YV7 obtains electric, the 9th inserted valve C9 openings, by adjusting The opening regulation handle of 8th inserted valve C8 adjusts uninterrupted, and the pressure oil stored in accumulator AC passes through the 9th inserted valve C9 and the 8th inserted valve C8 enters in four hydraulic die cushion plunger case 2b, realizes using accumulator AC to the hydraulic die cushion positioned at surrounding Plunger case 2b carries out quick repairing.

The first electromagnetic ball valve YV1 is obtained electric simultaneously, and the first inserted valve C1 is opened；The left electromagnetism of third solenoid directional control valve Iron YV4 obtains electric, third inserted valve C3 openings；The pressure oil of servopump B1 outputs inserts followed by third inserted valve C3 and first Valve C1 enters the cavity of resorption of hydraulic die cushion piston cylinder 2a, and the epicoele fluid of hydraulic die cushion piston cylinder 2a flows back to fuel tank through the 6th inserted valve C6.

(8) hydraulic die cushion pushes up slowly：After hydraulic die cushion displacement sensor S1, which detects hydraulic die cushion 2, rises to setting position, the 7th electricity Magnetic reversal valve YV7 dead electricity makes the 9th inserted valve C9 close, and accumulator AC stops to four hydraulic die cushion plunger case 2b repairings；Second electricity Magnetic reversal valve YV2 obtain it is electric so that the second inserted valve C2 is opened, the pressure oil of servopump B1 outputs enters hydraulic die cushion piston cylinder 2a simultaneously With four hydraulic die cushion plunger case 2b, hydraulic die cushion 2 switchs to eject at a slow speed, and hydraulic die cushion 2 can be realized using the servopump B1 of small displacement Ejection control.Hydraulic die cushion 2 can be realized by closing also operation control using servopump B1 combinations hydraulic die cushion displacement sensor S1 Ejection position accurately controls, and improves the one-pass molding rate of part.

(9) each cylinder of hydraulic die cushion is retracted：First electromagnetic ball valve YV1 and the second solenoid directional control valve YV2 are kept as electricity, make One inserted valve C1 and the second inserted valve C2 are stayed open；The right electromagnet YV3 of third solenoid directional control valve, which is obtained, electric makes third inserted valve C3 is closed；4th inserted valve C4 is opened because of hydraulic control mouth release, and the fluid of hydraulic die cushion piston cylinder 2a cavity of resorptions passes through the first inserted valve C1 and the 4th inserted valve C4 oil return boxes；Simultaneously the 5th solenoid directional control valve YV5 obtain it is electric so that the 7th inserted valve C7 is opened, hydraulic die cushion plunger Fluid in cylinder 2b passes through the second inserted valve C2, the 4th inserted valve C4 and the 7th inserted valve C7 oil return boxes.

(10) hydraulic die cushion stretches, and each cylinder is forced to retract：First electromagnetic ball valve YV1, the second solenoid directional control valve YV2 are kept Must be electric, so that the first inserted valve C1 and the second inserted valve C2 is stayed open；Right electromagnet YV3 dead electricity makes third solenoid directional control valve return to Middle position, the 4th inserted valve C4 are stayed open；5th solenoid directional control valve YV5 dead electricity makes the 7th inserted valve C7 close, hydraulic die cushion piston The fluid of cylinder 2a cavity of resorptions passes through the first inserted valve C1 and the 4th inserted valve C4 oil return boxes；Fluid in hydraulic die cushion plunger case 2b passes through The power of second inserted valve C2 and the 4th inserted valve C4 oil return boxes, stretching is controlled by the third pressure regulator valve F3 of the 4th inserted valve C4.

The foregoing is merely the preferable possible embodiments of the present invention, non-therefore the limitation present invention patent protection model It encloses.In addition to the implementation, the present invention can also have other embodiment.All skills formed using equivalent substitution or equivalent transformation Art scheme, is all fallen within the protection domain of application claims.Technical characteristic of the present invention without description can be by or using now There is technology realization, details are not described herein.

Claims

1. a kind of energy-saving type hydraulic press, including sliding block (1) and hydraulic die cushion (2), the top center of sliding block (1) are connected to sliding block plunger The lower end of cylinder (1b) is arranged with sliding block master cylinder (1a), the piston of sliding block master cylinder (1a) at left and right sides of sliding block plunger case (1b) Lower end is connected with sliding block (1) respectively；The bottom centre of hydraulic die cushion (2) is connected with hydraulic die cushion piston cylinder (2a), it is characterised in that：Liquid The four corners of pressure pad (2) are connected with the top of hydraulic die cushion plunger case (2b) respectively, the entrance of servopump (B1) with fuel tank phase Even, the outlet of servopump (B1) is connected with the entrance of the first check valve (D1), the outlet of the first check valve (D1) respectively with hydraulic pressure Pad control oil circuit, the entrance of the 11st inserted valve (C11) and the entrance of the 20th inserted valve (C20) are connected, the 11st inserted valve (C11) hydraulic control mouth is connected with the P mouths of the 8th solenoid directional control valve (YV8), the A mouths and the 20th of the 8th solenoid directional control valve (YV8) The entrance of inserted valve (C20) is connected, the B mouth connected tanks of the 8th solenoid directional control valve (YV8), and the 8th solenoid directional control valve (YV8) is two Position four-way electromagnetic reversing valve, the outlet of the 11st inserted valve (C11) is connected with accumulator (AC)；20th inserted valve (C20) Outlet is connected with sliding block master cylinder cavity of resorption oil circuit (G1), the hydraulic control mouth and the 16th electromagnetic ball valve of the 20th inserted valve (C20) (YV16) A mouths are connected, and the P mouths of the 16th electromagnetic ball valve (YV16) are connected with the outlet of the 20th inserted valve (C20), the The T mouths of 16 electromagnetic ball valves (YV16) are connected with the entrance of the 20th inserted valve (C20), the 16th electromagnetic ball valve (YV16) it is two-bit triplet solenoid directional control valve.

2. energy-saving type hydraulic press according to claim 1, it is characterised in that：Hydraulic die cushion control oil circuit include first to 9th inserted valve, the bottom of accumulator (AC) are connected with the entrance of the 9th inserted valve (C9), the outlet of the 9th inserted valve (C9) with The entrance of 8th inserted valve (C8) is connected, the main oil pipe phase of the outlet of the 8th inserted valve (C8) and each hydraulic die cushion plunger case (2b) Even；8th inserted valve (C8) is equipped with opening regulation handle, the hydraulic control mouth and the 7th solenoid directional control valve (YV7) of the 9th inserted valve (C9) A mouths be connected, the 7th solenoid directional control valve (YV7) be two four-way electromagnetic reversing valves, P mouths of the 7th solenoid directional control valve (YV7) and The entrance of 9th inserted valve (C9) is connected, and the T mouths of the 7th solenoid directional control valve (YV7) are connected with fuel tank.

3. energy-saving type hydraulic press according to claim 2, it is characterised in that：Third inserted valve (C3) and the 5th inserted valve (C5) entrance is connected with the outlet of the first check valve (D1) respectively, the outlet of third inserted valve (C3) respectively with the first inserted valve (C1), the entrance of the second inserted valve (C2) and the 4th inserted valve (C4) is connected, and outlet and the hydraulic die cushion of the first inserted valve (C1) are lived The cavity of resorption of plug cylinder (2a) is connected, the entrance of the outlet of the second inserted valve (C2) and the 7th inserted valve (C7) respectively with hydraulic die cushion plunger The hydraulic fluid port of cylinder (2b) is connected；The outlet of 5th inserted valve (C5) entrance and hydraulic die cushion piston cylinder with the 6th inserted valve (C6) respectively The epicoele of (2a) is connected, the outlet of the 4th inserted valve (C4), the 6th inserted valve (C6) and the 7th inserted valve (C7) respectively with fuel tank It is connected, the side of hydraulic die cushion (2) is equipped with hydraulic die cushion displacement sensor (S1).

4. energy-saving type hydraulic press according to claim 3, it is characterised in that：The hydraulic control mouth and first of first inserted valve (C1) The A mouths of electromagnetic ball valve (YV1) are connected, and the first electromagnetic ball valve (YV1) is two-bit triplet solenoid directional control valve, the first electromagnetism The P mouths of reversing globe valve (YV1) are connected with the outlet of the first inserted valve (C1), the T mouths and fuel tank of the first electromagnetic ball valve (YV1) It is connected；The hydraulic control mouth of second inserted valve (C2) is connected with the A mouths of the second solenoid directional control valve (YV2), the second solenoid directional control valve (YV2) P mouths for two four-way electromagnetic reversing valves, the second solenoid directional control valve (YV2) are connected with the entrance of the second inserted valve (C2), and second The T mouths of solenoid directional control valve (YV2) are connected with fuel tank；Go out in the middle part of the hydraulic control mouth of third inserted valve (C3) and the first shuttle valve (SF1) Mouth is connected, and the right end entrance of the first shuttle valve (SF1) is connected with the outlet of third inserted valve (C3), the left end of the first shuttle valve (SF1) Entrance is connected with the A of third solenoid directional control valve mouths, and third solenoid directional control valve is the 3-position 4-way electromagnetic switch that Median Function is p-type The B mouths of valve, third solenoid directional control valve are connected with the hydraulic control mouth of the 5th inserted valve (C5)；The P mouths and the 4th of third solenoid directional control valve The outlet of inserted valve (C4) is connected, and the T mouths of third solenoid directional control valve are connected with the outlet of third check valve (D3), third check valve (D3) entrance is connected with the entrance of the 5th inserted valve (C5)；The B mouths of third solenoid directional control valve and entering for the second check valve (D2) Mouth is connected, and the outlet of the second check valve (D2) is connected with the hydraulic control mouth of the 4th inserted valve (C4), the hydraulic control of the 4th inserted valve (C4) Mouth is also connected by third pressure regulator valve (F3) with fuel tank；Outlet of the A mouths of third solenoid directional control valve also with the 4th check valve (D4) It is connected, the entrance of the 4th check valve (D4) is connected with the hydraulic control mouth of the 6th inserted valve (C6), the hydraulic control mouth of the 6th inserted valve (C6) Also it is connected with fuel tank by the 4th pressure regulator valve (F4)；The B of the hydraulic control mouth and the 5th solenoid directional control valve (YV5) of 7th inserted valve (C7) Mouth is connected, and the 5th solenoid directional control valve (YV5) is two four-way electromagnetic reversing valves, the T mouths and the 7th of the 5th solenoid directional control valve (YV5) The outlet of inserted valve (C7) is connected.

5. energy-saving type hydraulic press according to claim 4, it is characterised in that：Main oil pump export pipeline (G2) is respectively with the tenth Three inserted valves (C13), the 14th inserted valve (C14) are connected with the entrance of the 15th inserted valve (C15), the 13rd inserted valve (C13) outlet is connected with the entrance of the 12nd inserted valve (C12), outlet and the sliding block plunger case of the 12nd inserted valve (C12) (1b) is connected with the epicoele of sliding block master cylinder (1a)；The outlet of 15th inserted valve (C15) respectively with the 16th inserted valve (C16), the 17th inserted valve (C17), the 18th inserted valve (C18) are connected with the entrance of the 19th inserted valve (C19), and the 18th The outlet of inserted valve (C18) is connected with sliding block master cylinder cavity of resorption oil circuit (G1), the 14th inserted valve (C14), the 16th inserted valve (C16), the outlet of the 17th inserted valve (C17) and the 19th inserted valve (C19) is connected with fuel tank respectively.

6. energy-saving type hydraulic press according to claim 5, it is characterised in that：The hydraulic control mouth of 13rd inserted valve (C13) with The A mouths of 9th solenoid directional control valve (YV9) are connected, the 9th P mouths of solenoid directional control valve (YV9) and entering for the 13rd inserted valve (C13) Mouth is connected, and the T mouths of the 9th solenoid directional control valve (YV9) are connected with fuel tank；The hydraulic control mouth and the tenth electromagnetism of 14th inserted valve (C14) The B mouths of reversal valve (YV10) are connected；The hydraulic control mouth of 15th inserted valve (C15) is connected with the centre exit of the second shuttle valve (SF2), The left entry of second shuttle valve (SF2) is connected with the outlet of the 15th inserted valve (C15), the right entry of the second shuttle valve (SF2) and The A mouths of 11 solenoid directional control valves (YV11) are connected, P mouths and the 15th inserted valve (C15) of the 11st solenoid directional control valve (YV11) Entrance be connected；The hydraulic control mouth of 16th inserted valve (C16) is connected with the A mouths of the 12nd solenoid directional control valve (YV12), and the 12nd The P mouths of solenoid directional control valve (YV12) are connected with the entrance of the 16th inserted valve (C16)；The hydraulic control mouth of 17th inserted valve (C17) It is connected with the A mouths of the 13rd solenoid directional control valve (YV13), P mouths and the 17th inserted valve of the 13rd solenoid directional control valve (YV13) (C17) entrance is connected；The hydraulic control mouth of 18th inserted valve (C18) is connected with the A mouths of the 14th electromagnetic ball valve (YV14), The P mouths of 14th electromagnetic ball valve (YV14) are connected with the outlet of the 18th inserted valve (C18)；18th inserted valve (C18) Hydraulic control mouth be connected with the A mouths of the 15th solenoid directional control valve (YV15), pass through the 9th pressure regulator valve (F9) and the 15th electromagnetic switch The P mouths of valve (YV15) are connected, and are connected with the B mouths of the 15th solenoid directional control valve (YV15) by the tenth pressure regulator valve (F10)；Tenth electricity Magnetic reversal valve (YV10), the 11st solenoid directional control valve (YV11), the 12nd solenoid directional control valve (YV12), the 13rd solenoid directional control valve (YV13) it is connected respectively with fuel tank with the T mouths of the 14th electromagnetic ball valve (YV14), the B of the 15th solenoid directional control valve (YV15) Mouth is connected with fuel tank；14th electromagnetic ball valve (YV14) be two-bit triplet solenoid directional control valve, the ten, the 11,12,13 It is two four-way electromagnetic reversing valves with 15 solenoid directional control valves.

7. energy-saving type hydraulic press according to claim 6, it is characterised in that：The epicoele and the 5th of hydraulic die cushion piston cylinder (2a) The outlet of check valve (D5) is connected, and the entrance of the 5th check valve (D5) is connected with fuel tank；It is inserted with the tenth the outlet of servopump (B1) The entrance for filling valve (C10) is connected, and the hydraulic control mouth of the tenth inserted valve (C10) is connected with the B mouths of the 6th solenoid directional control valve (YV6), the The T mouths of the outlet of ten inserted valves (C10) and the 6th solenoid directional control valve (YV6) are connected with fuel tank, the 6th solenoid directional control valve (YV6) For two four-way electromagnetic reversing valves.

8. energy-saving type hydraulic press according to claim 7, it is characterised in that：The servo motor (M1) of servopump (B1) and each Solenoid directional control valve is controlled by control system, and the control system includes PLC controller and servo controller (SDR), accumulator (AC) pressure switch (H1), hydraulic die cushion displacement sensor are connected on the pipeline between the outlet of the 11st inserted valve (C11) (S1) the hydraulic die cushion displacement signal input terminal (IN1) of signal output end access PLC controller, the height of pressure switch (H1) press off Close high-voltage signal input terminal (000 port) and DC power cathode that normally open contact (H1-1) is connected on PLC controller（VDC-） Between, the low pressure of pressure switch (H1) disconnects the low-voltage signal input terminal (001 that normally closed interlock (H1-2) is connected on PLC controller Port) between DC power cathode (VDC-)；The high-low pressure switching signal output end (002 port) and servo of PLC controller The servopump switching signal input terminal (MC) of controller (SDR) is connected；The flow of PLC controller increases signal output end (OUT1) Increase signal input part (AI3) with the flow of servo controller (SDR) to be connected, the flow of PLC controller reduces signal output end (COM1) reduce signal input part (FAC3) with the flow of servo controller (SDR) to be connected；The pressure of PLC controller increases signal Output end (OUT2) increases signal input part (AI2) with the pressure of servo controller (SDR) and is connected, and the pressure of PLC controller subtracts Small signal output end (COM2) reduces signal input part (FAC2) with the pressure of servo controller (SDR) and is connected；Servo is enabled to press Button (SB1) is connected between the enabling signal input terminal (DI3) of servo controller (SDR) and common end (COM)；Detect servopump (B1) the servopump pressure signal input end (AI1) of the pump intake pressure sensor (P1) of output pressure and servo controller (SDR) It is connected.

9. energy-saving type hydraulic press according to claim 8, it is characterised in that：Each working cycles of hydraulic press include successively Following action：(1) under sliding block level-one is fast：13rd inserted valve (C13) is opened, and fluid fills into the epicoele and cunning of sliding block master cylinder (1a) Block plunger case (1b)；11st inserted valve (C11), the 16th inserted valve (C16), the 17th inserted valve (C17), the 18th inserting Valve (C18) and the 20th inserted valve (C20) are opened, and the fuel-displaced of sliding block master cylinder (1a) rod cavity carries out preacceleration inflation to accumulator (AC)； (2) under sliding block two level is fast：12nd solenoid directional control valve (YV12) dead electricity makes the 16th inserted valve (C16) close；(3) under sliding block is slow： 20th inserted valve (C20) is closed, and the preacceleration inflation of accumulator (AC) terminates；Continue to fill to accumulator (AC) from servopump (B1) Pressure, the 11st inserted valve (C11) and the 17th inserted valve (C17) are closed after the completion of pressurising；(4) sliding block work is into pressurization：Sliding block master cylinder The support force of (1a) cavity of resorption is controlled by the 9th pressure regulator valve (F9)；(5) pressure release after sliding block pressurize：13rd inserted valve (C13), the tenth Eight inserted valves (C18) and the 19th inserted valve (C19) are closed, remaining each solenoid directional control valve is held in power failure state；(6) sliding block Backhaul：14th inserted valve (C14) is closed, and the 15th inserted valve (C15) is opened, the pressure oil of main oil pump export pipeline (G2) into Enter the cavity of resorption of sliding block master cylinder (1a)；Reverberation matrix method is controlled by the tenth pressure regulator valve (F10)；Each prefill valve (CF1) is opened, sliding block master cylinder The fluid of (1a) epicoele and sliding block plunger case (1b) passes through prefill valve (CF1) oil return box respectively.

10. energy-saving type hydraulic press according to claim 9, it is characterised in that：Each working cycles of the hydraulic press are also Include following action successively：(7) hydraulic die cushion pushes up soon：11st inserted valve (C11) and the 20th inserted valve (C20) are closed, and the 9th inserts It fills valve (C9) to open, the inner pressure oil of accumulator (AC) quickly fills into four hydraulic die cushion plunger cases (2b)；First inserting simultaneously Valve (C1), third inserted valve (C3) are opened, and the pressure oil of servopump (B1) output enters the cavity of resorption of hydraulic die cushion piston cylinder (2a), The epicoele fluid of hydraulic die cushion piston cylinder (2a) flows back to fuel tank through the 6th inserted valve (C6)；(8) hydraulic die cushion pushes up slowly：When hydraulic die cushion (2) After rising to setting position, the 9th inserted valve (C9) is closed, and accumulator (AC) stops to four hydraulic die cushion plunger case (2b) repairings； Second inserted valve (C2) is opened, and the pressure oil of servopump (B1) output enters hydraulic die cushion piston cylinder (2a) and four hydraulic die cushions simultaneously Plunger case (2b)；(9) each cylinder of hydraulic die cushion is retracted：Third inserted valve (C3) is closed, the 4th inserted valve (C4) and the 7th inserted valve (C7) It opens, the fluid oil return box in the fluid and hydraulic die cushion plunger case (2b) of hydraulic die cushion piston cylinder (2a) cavity of resorption；(10) hydraulic die cushion is drawn It stretches, each cylinder is forced to retract：Third solenoid directional control valve returns to middle position, and the 7th inserted valve (C7) is closed, under hydraulic die cushion piston cylinder (2a) The power of fluid oil return box in chamber and hydraulic die cushion plunger case (2b), stretching is controlled by third pressure regulator valve (F3).