CN207454419U - A kind of hydraulic plate shears and its hydraulic system - Google Patents

A kind of hydraulic plate shears and its hydraulic system Download PDF

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Publication number
CN207454419U
CN207454419U CN201721581222.2U CN201721581222U CN207454419U CN 207454419 U CN207454419 U CN 207454419U CN 201721581222 U CN201721581222 U CN 201721581222U CN 207454419 U CN207454419 U CN 207454419U
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China
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hydraulic
oil
cylinder
valve
fuel tank
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CN201721581222.2U
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石贤锋
石贤林
郑盼盼
王露
陶树任
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ANHUI DONGHAI MACHINE TOOL Co Ltd
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ANHUI DONGHAI MACHINE TOOL Co Ltd
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Abstract

The utility model discloses a kind of hydraulic plate shears and its hydraulic systems, belong to plate shearing machine technical field.A kind of hydraulic system of the hydraulic plate shears of the utility model, including oil pump, fuel tank, master cylinder and auxiliary oil cylinder, further include electro-hydraulic reversing valve, two position three way directional control valve and pressure switch, wherein, the oil inlet of the oil pump is connected with fuel tank, and oil outlet is connected with the epicoele of master cylinder, the B mouths of electro-hydraulic reversing valve and pressure switch;The P mouths of the electro-hydraulic reversing valve are connected with auxiliary oil cylinder inner cavity, and A mouthfuls are connected with the cavity of resorption of master cylinder, and T mouthfuls are connected with fuel tank;The P mouths of the two position three way directional control valve are connected with the oil outlet of oil pump, and B mouthfuls are connected with auxiliary oil cylinder inner cavity.The circuit of hydraulic system can be automatically switched according to the requirement for treating shear material using the plate shearing machine of the utility model, so as to meet thin plate THE ADIABATIC SHEAR IN, slab is sheared at a slow speed.

Description

A kind of hydraulic plate shears and its hydraulic system
Technical field
The utility model belongs to plate shearing machine technical field, more specifically to a kind of hydraulic plate shears and its hydraulic pressure system System.
Background technology
Plate shearing machine (English name:plate shears;Guillotine shear) belong to one kind in metal forming machinery, be It is done reciprocating linear motion with relatively another blade of a blade and shears the machine of plate.Plate shearing machine by means of movement cutter and Fixed bottom knife using rational gap blade, applies shearing force to the sheet metal of various thickness, makes plate by required Size fracture separation.At present, plate shearing machine product is widely used in aviation, light industry, metallurgy, chemical industry, building, ship, automobile, electricity The industries such as power, electric appliance, decoration provide required special-purpose machinery and complete set of equipments.
Plate shearing machine is divided into mechanical plate shearing machine and fluid pressure type plate shearing machine, and wherein hydraulic plate shears uses hydraulic drive, makes machine Device is steady when working, and noise is small, securely and reliably, can carry out single continuous shear stress, shear thickness compared with machine driving also compared with Thickness, therefore, hydraulic plate shears are mainly used for the THE ADIABATIC SHEAR IN of big specification shear.Due to the shearing number requirement now to plate shearing machine Higher and higher, in addition also increasingly thicker to the thickness for shearing plate, the hydraulic system oil cylinder of plate shearing machine is divided into master cylinder and pair oil Cylinder, the lower anchor ring product and the area of auxiliary oil cylinder epicoele of master cylinder cavity of resorption are closer to.When shearing the plate of small dimension, plate shearing machine Generally use parallel oil cylinder is sheared, i.e., the oil of cylinder hydraulic system oil pump discharge in parallel supplies two oil cylinders simultaneously, and parallel oil cylinder is cut The shearing force of cutting plate material is larger, but since two oil cylinders need fuel feeding simultaneously, therefore shear velocity is slower.When the plate for shearing big specification When, plate shearing machine generally use serial oil cylinders shearing, master cylinder cavity of resorption is cascaded with secondary cylinder epicoele, cylinder hydraulic system oil pump of connecting The oil of discharge only supplies master cylinder simultaneously, therefore shear velocity is improved, but is reduced with the shearing force of oil cylinder cylinder diameter.
Such as, Chinese Patent Application No. is:201610798743.7 the applying date is:On 08 31st, 2016, innovation and creation name Referred to as:A kind of lock formula hydraulic system of cutting machine, the master cylinder, auxiliary oil cylinder and backhaul oil cylinder of this application are connected with knife rest;Oil The inlet port connection fuel tank of pump, the import connection of oil outlet and sequence valve, the outlet of sequence valve is connected with master cylinder;Electromagnetism overflow The import of valve I and the oil outlet of oil pump connect, the outlet connection fuel tank of electromagnetic relief valve I;The rod chamber and auxiliary oil cylinder of master cylinder Rodless cavity be connected, and the oil outlet of oil pump is connected by switch valve, is provided on the pipeline that switch valve is connected with master cylinder Shut-off valve II;Accumulator is connected by shut-off valve I with the oil outlet of oil pump, and accumulator is connected with the rod chamber of backhaul oil cylinder, is returned The rodless cavity connection air of journey oil cylinder.The hydraulic system of this application is sheared using serial oil cylinders, and shear velocity is very fast, but Shearing force is smaller, when shearing thicker plate material, it is difficult to meet shearing demand.
For another example, Chinese patent 201410415397.0 discloses a kind of hydraulic system of cutting machine, the hydraulic pressure system of this application System includes hydraulic pressure pump group, system oil pressure control block, binder cylinder control valve block, several binder cylinders, main hydraulic cylinder control valve block and one To main hydraulic cylinder, the output terminal of hydraulic pressure pump group respectively with system oil pressure control block, binder cylinder control valve block input terminal, main hydraulic cylinder Control valve block input terminal is connected, and system oil pressure control block output terminal leads to fuel tank, binder cylinder control valve block output terminal respectively with it is several Binder cylinder back cavity is connected, and main hydraulic cylinder control valve block output terminal is connected with a pair of of main hydraulic cylinder back cavity, a pair of of main hydraulic cylinder piston Rod end head on the upside of knife rest respectively with being connected.This application is sheared using parallel oil cylinder, therefore its shearing force is larger, energy It is enough that slab is sheared well, but its shear velocity is relatively slow, so as to influence shear efficiency.
Therefore, how to meet requirement of the plate shearing machine to shearing force and shear velocity simultaneously, different rule can be suitable for The shearing of panel material has great importance.
Utility model content
1. utility model technical problems to be solved
The purpose of the utility model is to overcome existing plate shearing machines can not meet simultaneously to shearing force and shear velocity requirement Deficiency, provide a kind of hydraulic plate shears and its hydraulic system.It can be according to treating shear using the plate shearing machine of the utility model The circuit of hydraulic system is automatically switched in the requirement of material, so as to meet the shearing of different size plate.
2. technical solution
In order to achieve the above objectives, technical solution provided by the utility model is:
A kind of hydraulic system of hydraulic plate shears of the utility model including oil pump, fuel tank, master cylinder and auxiliary oil cylinder, is gone back Including electro-hydraulic reversing valve, two position three way directional control valve and pressure switch, wherein, the oil inlet of the oil pump is connected with fuel tank, Oil outlet is connected with the epicoele of master cylinder, the B mouths of electro-hydraulic reversing valve and pressure switch;The P mouths of the electro-hydraulic reversing valve with Auxiliary oil cylinder inner cavity is connected, and A mouthfuls are connected with the cavity of resorption of master cylinder, and T mouthfuls are connected with fuel tank;The P of the two position three way directional control valve Mouth is connected with the oil outlet of oil pump, and B mouthfuls are connected with auxiliary oil cylinder inner cavity.
Further, which includes two return cylinders, and the cavity of resorption of the return cylinder is connected with accumulator.
Further, the accumulator is also connected by pipeline with the oil outlet of oil pump, and above-mentioned pipeline is equipped with Gate valve.
Further, the inlet/outlet pipe road of the accumulator is also associated with pressure gauge, pressure meter switch and overflow valve.
Further, the A mouths of the electro-hydraulic reversing valve are connected by pressure measuring tie-in with fuel tank.
Further, the oil outlet of the oil pump is connected with binder cylinder, and passes through electromagnetic relief valve and be connected with fuel tank.
Further, the oil outlet of the oil pump is also connected with pressure gauge and pressure meter switch, and its oil outlet pipeline It is equipped with check valve.
Further, the oil pump is connected with motor, and oil filter is equipped between its oil inlet and fuel tank.
A kind of hydraulic plate shears of the utility model, including above-mentioned hydraulic system.
Further, the master cylinder and auxiliary oil cylinder are symmetrically distributed in the top both sides of knife rest.
3. advantageous effect
Using technical solution provided by the utility model, compared with prior art, there is following remarkable result:
(1) hydraulic system of a kind of hydraulic plate shears of the utility model, by adding electro-hydraulic reversing valve, two-position three way changes It is optimized to valve and pressure switch, and to the connection of fluid pressure line, so as to automatically switch difference as needed Fluid pressure line, and then meet the shearing demand of different size plate.
(2) hydraulic system of a kind of hydraulic plate shears of the utility model, when institute's shear material is relatively thin, system pressure compared with Low, the oil of oil pump discharge only supplies master cylinder simultaneously, and two oil cylinders are sheared using series system, so as to improve shear velocity;And When institute's shear material is thicker, when system pressure reaches pressure switch setting value, cylinder in parallel can be automatically switched into down cut, from And shearing force can be effectively improved, the shearing force with oil cylinder cylinder diameter adds 70% or so, and then advantageously ensures that shear effect.
(3) shear history, can be designed as by the hydraulic system of a kind of hydraulic plate shears of the utility model as needed Soon, slow double speed shearing, so as to farthest improve work efficiency on the basis of shearing force needed for guarantee, overcome because Plate shearing machine one velocity reduces the deficiency of work efficiency to lower shearing plate.
(4) hydraulic system of a kind of hydraulic plate shears of the utility model compared with existing series connection cylinder cut mode, can have The phenomenon that imitating the pressure of reduction master cylinder cavity of resorption and auxiliary oil cylinder chamber, and then avoiding causing oil leak or damage sealing ring due to high pressure.
Description of the drawings
Fig. 1 is a kind of structure diagram of the hydraulic system of hydraulic plate shears of the utility model;
Label declaration in schematic diagram:
1st, oil pump;2nd, motor;3rd, oil filter;4th, check valve;5th, electromagnetic relief valve;6th, knife rest;7th, return cylinder;8th, main oil Cylinder;9th, auxiliary oil cylinder;10th, pressure gauge;11st, pressure meter switch;12nd, accumulator;13rd, binder cylinder;14th, fuel tank;15th, two-position three way changes To valve;16th, gate valve;17th, pressure measuring tie-in;18th, electro-hydraulic reversing valve;19th, overflow valve;20th, pressure switch.
Specific embodiment
To further appreciate that the content of the utility model, the utility model is made in conjunction with the drawings and specific embodiments detailed Description.
Embodiment 1
As shown in Figure 1, a kind of hydraulic system of hydraulic plate shears of the present embodiment, including oil pump 1, fuel tank 14, master cylinder 8 With auxiliary oil cylinder 9, electro-hydraulic reversing valve 18, two position three way directional control valve 15 and pressure switch 20 are further included.Wherein, the oil pump 1 It is connected with motor 2, the oil inlet of the oil pump 1 is connected with fuel tank 14, and oil filter 3 is equipped between its oil inlet and fuel tank 14.Institute State the oil outlet of the oil pump 1 and epicoele of master cylinder 8, the B mouths of electro-hydraulic reversing valve 18 and pressure switch 20 is connected.It is described electro-hydraulic The P mouths of reversal valve 18 are connected with 9 inner cavity of auxiliary oil cylinder, and A mouthfuls are connected with the cavity of resorption of master cylinder 8, and T mouthfuls are connected with fuel tank 14;Institute The P mouths for stating two position three way directional control valve 15 are connected with the oil outlet of oil pump 1, and B mouthfuls are connected with 9 inner cavity of auxiliary oil cylinder.The present embodiment Hydraulic system includes two return cylinders 7, and the cavity of resorption of the return cylinder 7 is connected with accumulator 12.The accumulator 12 passes through pipe Road is connected with the oil outlet of oil pump 1, and above-mentioned pipeline is equipped with gate valve 16.The inlet/outlet pipe road of the accumulator 12 is also connected with There are pressure gauge 10, pressure meter switch 11 and overflow valve 19.
Since the hydraulic system of plate shearing machine in the prior art is directly using cylinder shearing in parallel or series connection cylinder cut mode, so as to Requirement of the different size plate to shear velocity and shearing force can not be met, in order to meet the use demand of different size plate, Enterprise needs to buy the plate shearing machine of different cylinder connecting ways, and financial cost is higher.In view of the above problems, inventor passes through experiment Design is optimized to the hydraulic system of plate shearing machine in research.It is with being cut due to the size of the shear shearing force of plate shearing machine The increase of thickness of slab and raise, therefore the hydraulic system of the present embodiment can when shearing thin plate for serial oil cylinders shear, improve shearing Speed, and when clipping to thick blanks, hydraulic system then automatically switches into parallel oil cylinder shearing, so as to increase shearing force, improves Work efficiency.Therefore, different size plate can be met to shear velocity and shearing force using the hydraulic system of the present embodiment It is required that and system stability it is preferable.In addition, when the cut mode using existing series connection cylinder, in shearing thick blanks in auxiliary oil cylinder one During the stress of side, when reaching full load such as the system pressure of master cylinder epicoele, then the pressure of master cylinder cavity of resorption and auxiliary oil cylinder epicoele will It is 1.7 times of master cylinder epicoele, easy oil leakage or damage sealing ring after high pressure.And use the hydraulic system of the present embodiment that can effectively drop Low system pressure reduces the oil leakage fault generated due to high pressure.
Embodiment 2
As shown in Figure 1, a kind of hydraulic system of hydraulic plate shears of the present embodiment, structure is substantially the same as embodiment 2, area It is not:The A mouths of the electro-hydraulic reversing valve 18 are connected by pressure measuring tie-in 17 with fuel tank 14.The oil outlet and pressure of the oil pump 1 Material cylinder 13 is connected, and treating shear material by the setting of binder cylinder 13 carries out binder positioning, so as to prevent plate from shearing It is moved in journey, influences shearing quality.The oil outlet of the oil pump 1 is connected by electromagnetic relief valve 5 with fuel tank 14, and with pressure Power table 10 and pressure meter switch 11 are connected, and its oil outlet pipeline is equipped with check valve 4.Pass through pressure gauge 10 and pressure meter switch 11 can monitor the oil outlet pressure of oil pump 1 in real time, advantageously ensure that system just by the setting of electromagnetic relief valve 5 Normal trouble free service.
Embodiment 3
A kind of hydraulic plate shears of the present embodiment, for hydraulic system with embodiment 3, the master cylinder 8 and auxiliary oil cylinder 9 are symmetrical It is distributed in the top both sides of knife rest 6.When carrying out shear using the hydraulic plate shears of the present embodiment, process is:
THE ADIABATIC SHEAR IN:Solenoid valve YV1 obtains electric, and the hydraulic oil that oil pump 1 is confessed leads directly to 8 epicoele of master cylinder through check valve 4, promotes Descent of piston, A mouth of the fluid through electro-hydraulic reversing valve 19 of 8 cavity of resorption of master cylinder arrives 9 intracavitary of auxiliary oil cylinder again to P mouthfuls, due to master cylinder The lower anchor ring product of cavity of resorption is no better than the area of auxiliary oil cylinder epicoele, and oil pump is only for master cylinder epicoele, so two oil cylinders make series system Band movable knife rack 6 is quickly to down cut;Return cylinder 7 is subject to the downstream pressure of 6 downlink of knife rest, is expelled from the fluid of intracavitary to accumulator 12 times intracavitary;
It shears at a slow speed:When 6 fast downlink of knife rest clips to plate, hydraulic system pressure rise, when system pressure reaches pressure During the setting value of power relay 20, feedback signal is to electric system, then to obtain YV3 electric, and electro-hydraulic reversing valve 19 commutates at this time, makes master A mouth of the fluid of 8 cavity of resorption of oil cylinder through electro-hydraulic reversing valve 19 arrives fuel tank 14 again to T mouthfuls, and the pressure oil that oil pump 1 is confessed changes again through electro-hydraulic 9 intracavitary of auxiliary oil cylinder is arrived again to the B mouths of valve 19 to P mouthfuls, and band movable knife rack 6 is at a slow speed to down cut;Return cylinder 7 is subject to 6 downlink of knife rest Pressure is expelled from the fluid of intracavitary to 12 times intracavitary of accumulator;
Return:Solenoid valve YV2 obtains electric, and the hydraulic oil that oil pump 1 is confessed flows back to fuel tank 14 through check valve 4 and electromagnetic relief valve 5, 8 epicoele of master cylinder does not have pressure at this time, due to the pressure oil release in accumulator 12, promotes return cylinder 7 with 6 backhaul of movable knife rack, The cavity of resorption that P mouth of the oil of 9 intracavitary of auxiliary oil cylinder again through electro-hydraulic reversing valve 19 again returns to master cylinder 8 to A mouthfuls, 8 epicoele of master cylinder Oil flows back to fuel tank 14 from electromagnetic relief valve 5 again;Solenoid valve 15 it is electric after 8 cavity of resorption of master cylinder and 9 intracavitary of auxiliary oil cylinder is made to carry out poor association Repairing;
Filling liquid:Gate valve 16 is opened, presses filling liquid button, solenoid valve YV1 obtains electric, and the hydraulic oil that oil pump 1 is confessed is straight through check valve 4 8 epicoele of logical master cylinder, promotes descent of piston, and A mouth of the fluid through electro-hydraulic reversing valve 19 of 8 cavity of resorption of master cylinder arrives secondary oil again to P mouthfuls 9 intracavitary of cylinder, band movable knife rack 6 is quickly to down cut;Return cylinder 7 is subject to the downstream pressure of 6 downlink of knife rest, is expelled from the fluid of intracavitary To 12 times intracavitary of accumulator, when knife rest 6 goes downwards to after bottom dead center or shears slab, hydraulic system pressure rise, oil pump is confessed Fluid through gate valve 16 until 12 times intracavitary of accumulator, give accumulator 12 filling liquid, after required pressure value is reached, closing gate valve 16, filling liquid knob, 6 return of knife rest are unclamped again, filling liquid is completed.
I.e. when shearing thin plate material using the plate shearing machine of the present embodiment, master cylinder 8 and auxiliary oil cylinder 9 make series system quickly to Down cut;When shearing thick blanks, master cylinder 8 first makees series system quickly to down cut with auxiliary oil cylinder 9, when cutter touches During institute's shear material, the pressure rise of hydraulic system, when reaching pressure switch setting pressure, feedback signal makes again to electrical system The YV2 of electro-hydraulic reversing valve 18 obtains electric, and master cylinder 8 and auxiliary oil cylinder 9 make parallel way at a slow speed to down cut at this time, increase shearing Power, the downward shearing force of cylinder in parallel improve 70% or so than series connection cylinder.Using the hydraulic system of the present embodiment, user can basis Need shear history being designed as the shearing of fast, slow double speed, so as on the basis of shearing force needed for guarantee farthest Work efficiency is improved, overcomes the deficiency that work efficiency is reduced due to plate shearing machine one velocity is to lower shearing plate.It is specific to cut soon and slow shear Setting pressure of the switching selection of mode depending on pressure switch 20.
Schematically the utility model and embodiments thereof are described above, this describes no restricted, attached drawing Shown in be also the utility model one of embodiment, actual structure is not limited thereto.So if this field Those of ordinary skill enlightened by it, without deviating from the purpose of the present invention, not inventively design The frame mode similar to the technical solution and embodiment, all should belong to the protection range of the utility model.

Claims (10)

1. a kind of hydraulic system of hydraulic plate shears, special including oil pump (1), fuel tank (14), master cylinder (8) and auxiliary oil cylinder (9) Sign is:Electro-hydraulic reversing valve (18), two position three way directional control valve (15) and pressure switch (20) are further included, wherein, the oil pump (1) oil inlet is connected with fuel tank (14), epicoele, the B mouths and pressure of electro-hydraulic reversing valve (18) of oil outlet and master cylinder (8) Relay (20) is connected;The P mouths of the electro-hydraulic reversing valve (18) are connected with auxiliary oil cylinder (9) inner cavity, A mouthfuls and master cylinder (8) Cavity of resorption be connected, T mouthfuls are connected with fuel tank (14);The oil outlet phase of the P mouths and oil pump (1) of the two position three way directional control valve (15) Even, B mouthfuls are connected with auxiliary oil cylinder (9) inner cavity.
2. a kind of hydraulic system of hydraulic plate shears according to claim 1, it is characterised in that:The hydraulic system includes two A return cylinder (7), the cavity of resorption of the return cylinder (7) are connected with accumulator (12).
3. a kind of hydraulic system of hydraulic plate shears according to claim 2, it is characterised in that:The accumulator (12) Also it is connected by pipeline with the oil outlet of oil pump (1), and above-mentioned pipeline is equipped with gate valve (16).
4. a kind of hydraulic system of hydraulic plate shears according to Claims 2 or 3, it is characterised in that:The accumulator (12) inlet/outlet pipe road is also associated with pressure gauge (10), pressure meter switch (11) and overflow valve (19).
5. a kind of hydraulic system of hydraulic plate shears according to any one of claim 1-3, it is characterised in that:The electricity The A mouths of liquid reversal valve (18) are connected by pressure measuring tie-in (17) with fuel tank (14).
6. a kind of hydraulic system of hydraulic plate shears according to any one of claim 1-3, it is characterised in that:Described Oil pump (1) is connected by electromagnetic relief valve (5) with fuel tank (14).
7. a kind of hydraulic system of hydraulic plate shears according to claim 6, it is characterised in that:Oil pump (1) goes out Hydraulic fluid port pipeline is equipped with check valve (4).
8. a kind of hydraulic system of hydraulic plate shears according to claim 7, it is characterised in that:The oil pump (1) with Motor (2) is connected, and oil filter (3) is equipped between its oil inlet and fuel tank (14).
9. a kind of hydraulic plate shears, it is characterised in that:Including the hydraulic system any one of claim 1-8.
10. a kind of hydraulic plate shears according to claim 9, it is characterised in that:The master cylinder (8) and auxiliary oil cylinder (9) It is symmetrically distributed in the top both sides of knife rest (6).
CN201721581222.2U 2017-11-23 2017-11-23 A kind of hydraulic plate shears and its hydraulic system Active CN207454419U (en)

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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN107795530A (en) * 2017-11-23 2018-03-13 安徽东海机床制造有限公司 A kind of hydraulic plate shears and its hydraulic system

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN107795530A (en) * 2017-11-23 2018-03-13 安徽东海机床制造有限公司 A kind of hydraulic plate shears and its hydraulic system

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