CN204436893U - Plastic deformation squeezes the hydraulic system of forging molding equipment - Google Patents
Plastic deformation squeezes the hydraulic system of forging molding equipment Download PDFInfo
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- CN204436893U CN204436893U CN201420405159.7U CN201420405159U CN204436893U CN 204436893 U CN204436893 U CN 204436893U CN 201420405159 U CN201420405159 U CN 201420405159U CN 204436893 U CN204436893 U CN 204436893U
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- 238000005242 forging Methods 0.000 title claims abstract description 38
- 238000000465 moulding Methods 0.000 title claims abstract description 34
- 239000003921 oil Substances 0.000 claims abstract description 249
- 239000010720 hydraulic oil Substances 0.000 claims abstract description 3
- 230000008676 import Effects 0.000 claims description 4
- 238000004519 manufacturing process Methods 0.000 abstract description 6
- 230000008901 benefit Effects 0.000 abstract description 3
- 238000005516 engineering process Methods 0.000 description 7
- 239000002184 metal Substances 0.000 description 7
- 230000009471 action Effects 0.000 description 4
- 239000010727 cylinder oil Substances 0.000 description 4
- 238000010586 diagram Methods 0.000 description 4
- 238000000034 method Methods 0.000 description 4
- 238000000926 separation method Methods 0.000 description 3
- 230000006835 compression Effects 0.000 description 2
- 238000007906 compression Methods 0.000 description 2
- 238000005520 cutting process Methods 0.000 description 2
- 230000007423 decrease Effects 0.000 description 2
- 230000006872 improvement Effects 0.000 description 2
- 230000008569 process Effects 0.000 description 2
- 238000003860 storage Methods 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000015572 biosynthetic process Effects 0.000 description 1
- 230000008859 change Effects 0.000 description 1
- 238000006243 chemical reaction Methods 0.000 description 1
- 230000006837 decompression Effects 0.000 description 1
- 230000007812 deficiency Effects 0.000 description 1
- 238000007599 discharging Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000005265 energy consumption Methods 0.000 description 1
- 238000004146 energy storage Methods 0.000 description 1
- 239000000446 fuel Substances 0.000 description 1
- 238000002347 injection Methods 0.000 description 1
- 239000007924 injection Substances 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 230000021715 photosynthesis, light harvesting Effects 0.000 description 1
- 239000007787 solid Substances 0.000 description 1
- 239000000243 solution Substances 0.000 description 1
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Abstract
The utility model discloses the hydraulic system that a kind of plastic deformation squeezes forging molding equipment, comprise pressure oil-source, oil pressure pressurizing elements, executive component and low pressure accumulator, pressure oil-source is connected with oil pressure pressurizing elements by working oil path, oil pressure pressurizing elements is connected with executive component, executive component connects the first unloading valve group being used for carrying out off-load when oil pressure reaches setting value, and the drain tap of the first unloading valve group is communicated with low pressure accumulator and lets out hydraulic oil in low pressure accumulator.The advantages such as the utility model has that capacity usage ratio is high, working stability is reliable, energy-conserving and environment-protective, cost of production are low.
Description
Technical field
The utility model relates to a kind of hydraulic system, is specifically related to the hydraulic system that a kind of plastic deformation squeezes forging molding equipment.
Background technique
It is a kind of method utilizing Principles of Metal Forming to carry out pressure processing that metal squeezes forging molding technology, mould will be put into through pretreated metal blank, then on metal blank, apply pressure makes metal blank generation be out of shape and be full of mold cavity, thus the part required for obtaining.It is a kind of few cutting or the advanced technologies without cutting that metal squeezes forging molding technology, be beneficial to the quality improving goods, improve goods interior microscopic structure and properties, and also have and save that material, energy consumption are low, applied range, production chains is large, the feature that technological process is simple and equipment investment is few.
At present, also there is a lot of application technology bottleneck in crowded forging molding technology and crowded forging molding equipment both at home and abroad, and this technology can not be developed fully.
Crowded forging power needed for metal blank plastic deformation is very large, and hydraulic system needs to ensure to provide enough energy, could meet and squeeze forging requirement.For reaching the requirement of crowded forging power, the hydraulic system pressure squeezed in forging molding equipment can reach dozens or even hundreds of MPa, therefore the following problem of hydraulic system ubiquity of forging molding equipment is squeezed: 1, the Power supply of hydraulic system requires high, and high to the performance requirement of equipment, the investment of equipment is also large; 2, squeeze forging again to the process of discharging for completing from being fed to, system needs to carry out release, and existing way is directly discharged in mailbox by the pressure oil of system, causes a large amount of energy dissipations; 3, because system working pressure reaches dozens or even hundreds of MPa, this will certainly increase the loss of hydraulic element and the requirement of performance thereof, require also high to the Reliability of Microprocessor of hydraulic element, but hydraulic element selectable range is few in existing crowded forging molding equipment, especially for system decompression aspect, the generation of the situation of building the pressure can't be avoided completely when existing unloading valve is used in crowded forging molding equipment, once occur building the pressure, very likely cause the damage of hydraulic component, high pressure oil ejection also easily causes casualties, and there are major safety risks.And in existing crowded forging molding equipment, being all adopt Combined valve group to carry out pressure release, there is complex structure, controls the problems such as difficulty is large, action is insensitive, easily break down in it.
Model utility content
The technical problems to be solved in the utility model overcomes the deficiency that prior art exists, and provides that a kind of capacity usage ratio is high, working stability is reliable, hydraulic system that energy-conserving and environment-protective, plastic deformation that cost of production is low squeeze forging molding equipment.
For solving the problems of the technologies described above, the utility model by the following technical solutions:
A kind of plastic deformation squeezes the hydraulic system of forging molding equipment, comprise pressure oil-source, oil pressure pressurizing elements, executive component and low pressure accumulator, described pressure oil-source is connected with oil pressure pressurizing elements by working oil path, described oil pressure pressurizing elements is connected with executive component, described executive component connects the first unloading valve group being used for carrying out off-load when oil pressure reaches setting value, and the drain tap of described first unloading valve group is communicated with described low pressure accumulator and is let out by hydraulic oil in described low pressure accumulator.
As further improvement of the utility model:
Described first unloading valve group comprises the on-off valve being controlled break-make by pressure gauge with electric contact.
Described oil pressure pressurizing elements is pressurized cylinder group, described pressurized cylinder group comprises pressurizing cylinder and performs oil cylinder, the cross-section area of the piston of described pressurizing cylinder is greater than the cross-section area of the piston of described execution oil cylinder, be provided with the charged piston matched in the rodless cavity of described execution oil cylinder, the piston rod of described pressurizing cylinder is connected with described charged piston.
Described execution oil cylinder is connected with the second unloading valve group, and the drain tap of described second unloading valve group is communicated with described low pressure accumulator, and described second unloading valve group is the on-off valve being controlled break-make by pressure gauge with electric contact; Described execution oil cylinder is also connected with and controls by pressure oil the passive type overpressure unloading valve that off-load is carried out in spool slip, and the drain tap of described passive type overpressure unloading valve is communicated with described working oil path or described low pressure accumulator.
Described executive component is unidirectional oil cylinder, and described unidirectional oil cylinder is located on the piston rod of described execution oil cylinder, and the import of described first unloading valve group is communicated with bottom the rodless cavity of described unidirectional oil cylinder.
Described executive component is connected with and controls by pressure oil the passive type overpressure unloading valve that off-load is carried out in spool slip, and the drain tap of described passive type overpressure unloading valve is communicated with described working oil path or described low pressure accumulator.
Described passive type overpressure unloading valve comprises valve body and is slidedly arranged on the spool in described valve body, described spool is provided with the first hydraulic driving portion vertically successively, second hydraulic driving portion and the 3rd hydraulic driving portion, described valve body is provided with and is communicated with working oil path and drives first pressure oil cavity in the first hydraulic driving portion, be communicated with the working oil chamber of executive component and drive second pressure oil cavity in the second hydraulic driving portion and be communicated with working oil path and drive the 3rd pressure oil cavity in the 3rd hydraulic driving portion, the driving direction in described second hydraulic driving portion and the 3rd hydraulic driving portion is in the same way and contrary with the driving direction in the first hydraulic driving portion, the oil pressure active area that the oil pressure active area in described first hydraulic driving portion is greater than described second hydraulic driving portion adds the oil pressure active area sum in described 3rd hydraulic driving portion, described spool makes the working oil chamber of described executive component be communicated with working oil path or disconnect by sliding.
Described spool comprises the slide bar portion be slidedly arranged in described valve body, the one end in described slide bar portion forms described 3rd hydraulic driving portion, the middle part in described slide bar portion arranges boss and forms described second hydraulic driving portion, and described first hydraulic driving portion is removably connected to the other end in described slide bar portion; Described first pressure oil cavity and the 3rd pressure oil cavity lay respectively at the two ends of described spool, and described second pressure oil cavity is positioned at the middle part of described spool.
Described valve body is provided with oil drain passage, and described oil drain passage is communicated with the inner chamber that described valve body coordinates with slide bar portion; Described oil drain passage is located at the position near the first pressure oil cavity; The elastic element by elastic force pressed spool is provided with between described valve body and spool.
Described 3rd pressure oil cavity is provided with the break-make mouth that the working oil chamber of described executive component can be made to be communicated with working oil path, slides with spool and described break-make mouth is opened or closes in the end in described 3rd hydraulic driving portion; The end in described 3rd hydraulic driving portion is coordinated by conical surface contact with described break-make mouth.
Compared with prior art, the utility model has the advantage of: the utility model plastic deformation squeezes the hydraulic system of forging molding equipment, by oil pressure pressurizing elements, supercharging is carried out to executive component, executive component in the course of the work, when its operating oil pressure superpressure reaches setting value, first unloading valve group can carry out off-load to executive component, to ensure the reliability of work, and avoids damaging hydraulic system; Meanwhile, the high pressure oil that the first unloading valve group draws off drains in the low pressure accumulator of system, is stored and the operating on low voltage element of supply system by low pressure accumulator, high pressure oil is reused, decrease the energy supply requirement to system, reach the object of energy-conserving and environment-protective, also reduce cost of production.Especially squeeze the high pressure working environment of forging molding equipment for plastic deformation, this hydraulic system can put forward high-octane utilization ratio greatly.
Accompanying drawing explanation
Fig. 1 is the schematic diagram that the utility model plastic deformation squeezes the hydraulic system of forging molding equipment.
Fig. 2 is the sectional structure schematic diagram that the utility model plastic deformation squeezes oil pressure pressurizing elements and executive component in the hydraulic system of forging molding equipment.
Fig. 3 is the sectional structure schematic diagram that the utility model plastic deformation squeezes passive type overpressure unloading valve in the hydraulic system of forging molding equipment.
Fig. 4 is the main sectional structure schematic diagram that the utility model plastic deformation squeezes the spool of passive type overpressure unloading valve in the hydraulic system of forging molding equipment.
Marginal data:
1, passive type overpressure unloading valve; 11, valve body; 111, the first pressure oil cavity; 112, the second pressure oil cavity; 113, the 3rd pressure oil cavity; 114, break-make mouth; 12, spool; 121, the first hydraulic driving portion; 122, the second hydraulic driving portion; 123, the 3rd hydraulic driving portion; 13, elastic element; 14, oil drain passage; 2, pressure oil-source; 3, oil pressure pressurizing elements; 31, pressurizing cylinder; 32, oil cylinder is performed; 33, charged piston; 4, executive component; 5, working oil path; 6, the first unloading valve group; 7, the second unloading valve group; 8, low pressure accumulator.
Embodiment
Below in conjunction with the drawings and specific embodiments, the utility model is described in further detail.
As depicted in figs. 1 and 2, the utility model plastic deformation squeezes the hydraulic system of forging molding equipment, comprises pressure oil-source 2, oil pressure pressurizing elements 3, executive component 4 and low pressure accumulator 8, and wherein, pressure oil-source 2 is oil pump or hydraulic station; Oil pressure pressurizing elements 3 is pressurized cylinder group, pressurized cylinder group comprises pressurizing cylinder 31 and performs oil cylinder 32, the cross-section area of the piston of pressurizing cylinder 31 is greater than the cross-section area of the piston performing oil cylinder 32, be provided with the charged piston 33 matched in the rodless cavity of execution oil cylinder 32, the piston rod of pressurizing cylinder 31 is connected with charged piston 33; Executive component 4 is unidirectional oil cylinder, and unidirectional oil cylinder is located on the piston rod of execution oil cylinder 32, and the import of the first unloading valve group 6 is communicated with bottom the rodless cavity of unidirectional oil cylinder; The energy-storage pressure of low pressure accumulator 8 is less than the pressure of working oil path 5, low pressure oil can be supplied to the operating on low voltage element of system, it is existing pneumohydraulic accumulator, it arranges the separation plate that piston type coordinates in the cavity closed, cavity is separated into two chambers by separation plate, a chamber is the air storing cavity injecting pressurized gas wherein, and another chamber is the oil storage cavity for pressure store oil; Executive component 4 is unidirectional oil cylinder, and unidirectional oil cylinder is located on the piston rod of execution oil cylinder 32, and the import of the first unloading valve group 6 is communicated with bottom the rodless cavity of unidirectional oil cylinder.Pressure oil-source 2 to be connected with the rodless cavity of pressurizing cylinder 31 by working oil path 5 and to carry out fuel feeding, executive component 4 connects the first unloading valve group 6 being used for carrying out off-load when oil pressure reaches setting value, the drain tap of the first unloading valve group 6 is communicated with low pressure accumulator 8, when off-load, high pressure oil is discharged in the oil storage cavity of low pressure accumulator 8, this the first unloading valve group 6 is the on-off valve being controlled break-make by pressure gauge with electric contact, such as, adopt the combination of pressure gauge with electric contact, solenoid valve and cartridge valve, by pressure gauge with electric contact detected pressures, then by electromagnetic valve cartridge valve break-make.
Opening on-off valve can inject in unidirectional oil cylinder by pressure oil, the flexible rod of unidirectional oil cylinder stretches out, closing on-off valve again can make the flexible rod of unidirectional oil cylinder keep stretching out state, pressure gauge with electric contact can detect the oil pressure in the pressure oil cavity of unidirectional oil cylinder, the break-make of the next corresponding control on-off valve of force value (force value of this setting sets according to actual conditions) of setting whether is reached again according to this oil pressure, during work unidirectional oil cylinder pressure oil cavity in oil pressure can raise, effect due to oil pressure pressurizing elements 3 makes the oil pressure of unidirectional in-oil cylinder oil pressure ratio system works oil circuit 5 large, when after the setting value reaching pressure gauge with electric contact, pressure gauge with electric contact control on-off valve is opened and is carried out off-load to unidirectional oil cylinder, to ensure the reliability of work, and avoid damaging hydraulic system, pressure oil is directly discharged in low pressure accumulator 8 by on-off valve, is again utilized the operating on low voltage element of drive hydraulic system principle, like this, decreases the energy supply requirement to system, reaches the object of energy-conserving and environment-protective, also reduce cost of production.Especially squeeze the high pressure working environment of forging molding equipment for plastic deformation, this hydraulic system can put forward high-octane utilization ratio greatly.
In the present embodiment, perform oil cylinder 32 and be connected with the second unloading valve group 7, second unloading valve group 7 is the on-off valve being controlled break-make by pressure gauge with electric contact, and its working principle is identical with the first unloading valve group 6, and it also adopts the combination of pressure gauge with electric contact, solenoid valve and cartridge valve.By arranging the second unloading valve group 7, protection can being implemented to execution oil cylinder 32, avoiding the various problems occurring causing because building the pressure.The drain tap of this second unloading valve group 7 is also communicated with low pressure accumulator 8, and pressure oil when performing oil cylinder 32 superpressure is discharged in low pressure accumulator 8 by it.
In the present embodiment, executive component 4 is connected with and controls by pressure oil the passive type overpressure unloading valve 1 that off-load is carried out in spool 12 slip, and the drain tap of passive type overpressure unloading valve 1 is communicated with working oil path 5.As shown in Figure 3 and Figure 4, above-mentioned passive type overpressure unloading valve 1 comprises spool 12 and valve body 11, and spool 12 is slidedly arranged in valve body 11, and spool 12 is solid of rotation, and the inner chamber that valve body 11 coordinates with spool 12 is cylindrical cavity.Spool 12 is provided with the first hydraulic driving portion 121 vertically successively, second hydraulic driving portion 122 and the 3rd hydraulic driving portion 123, valve body 11 is provided with the first pressure oil cavity 111, second pressure oil cavity 112 and the 3rd pressure oil cavity 113, wherein, first pressure oil cavity 111 is communicated with working oil path 5, first pressure oil cavity 111 coordinates with the first hydraulic driving portion 121 and drives spool 12 to slide, second pressure oil cavity 112 is communicated with the working oil chamber (rodless cavity of unidirectional oil cylinder) of executive component 4, second pressure oil cavity 112 coordinates with the second hydraulic driving portion 122 and drives spool 12 to slide, 3rd pressure oil cavity 113 is communicated with working oil path 5, 3rd pressure oil cavity 113 coordinates driving the 3rd hydraulic driving portion 123 to drive spool 12 to slide with the 3rd hydraulic driving portion 123.The driving direction of the second pressure oil cavity 112 and the 3rd pressure oil cavity 113 is in the same way, and contrary with the driving direction of the first pressure oil cavity 111, and the hydraulic driving area that the hydraulic driving area in the first hydraulic driving portion 121 is greater than the second hydraulic driving portion 122 adds the hydraulic driving area sum in the 3rd hydraulic driving portion 123.The driving force situation corresponding slip of spool 12 suffered by the first hydraulic driving portion 122 of hydraulic driving portion 121, second and the 3rd hydraulic driving portion 123, spool 12 makes the working oil chamber of executive component 4 be communicated with working oil path 5 or disconnect by sliding.Above-mentioned oil pressure active area refers to that each pressure oil cavity drives the actual driving area in corresponding hydraulic driving portion.
In the present embodiment, slide with spool 12 and make break-make mouth 114 open or close in the end that the 3rd pressure oil cavity 113 is provided with break-make mouth the 114, three hydraulic driving portion 123 that the working oil chamber of executive component 4 can be made to be communicated with working oil path 5.Specifically, break-make mouth 114 is between the 3rd pressure oil cavity 113 and the second pressure oil cavity 112, end and the break-make mouth 114 in the 3rd hydraulic driving portion 123 are equipped with conical surface, when spool 12 slides, the conical surface of the end in the 3rd hydraulic driving portion 123 and the conical surface of break-make mouth 114 can be made to fit formation ring seal face, break-make mouth 114 is closed, or makes the end in the 3rd hydraulic driving portion 123 away from break-make mouth 114, break-make mouth 114 is opened.When the driving force suffered by the first hydraulic driving portion 121 is greater than the driving force suffered by the second hydraulic driving portion 122 and the driving force sum suffered by the 3rd hydraulic driving portion 123, spool 12 slides to the direction closing break-make mouth 114, the end face in the 3rd hydraulic driving portion 123 and break-make mouth 114 are fitted to be closed by break-make mouth 114, the second pressure oil cavity 112 is not communicated with the 3rd pressure oil cavity 113; When the driving force suffered by the first hydraulic driving portion 121 is less than the driving force suffered by the second hydraulic driving portion 122 and the driving force sum suffered by the 3rd hydraulic driving portion 123, spool 12 slides to the direction of opening break-make mouth 114, end face and the break-make mouth 114 in the 3rd hydraulic driving portion 123 depart from, second pressure oil cavity 112 is communicated with the 3rd pressure oil cavity 113 by break-make mouth 114, now, passive type overpressure unloading valve 1 carries out off-load, and the high pressure oil in the working oil chamber of executive component 4 is discharged in working oil path 5 by the second pressure oil cavity 112.
In the present embodiment, elastic element 13 is provided with between valve body 11 and spool 12, elastic element 13 is coil tension spring, between the inwall that this coil tension spring is pressed on the first pressure oil cavity 111 and spool 12, when the first pressure oil cavity 111, second pressure oil cavity 112 and the 3rd pressure oil cavity 113 do not pass into pressure oil, coil tension spring elastic compression spool 12, makes spool 12 be in the position closing break-make mouth 114.
In the present embodiment, spool 12 comprises the slide bar portion be slidedly arranged in valve body 11, the one end in slide bar portion forms the 3rd hydraulic driving portion 123, the middle part in slide bar portion arranges annular boss and forms the second hydraulic driving portion 122, first hydraulic driving portion 121 and slide bar portion are Split type structure, first hydraulic driving portion 121 is installed in the first pressure oil cavity 111, and the first hydraulic driving portion 121 the other end that is direct and slide bar portion offsets.First pressure oil cavity 111 and the 3rd pressure oil cavity 113 lay respectively at the two ends of spool 12, and the second pressure oil cavity 112 is positioned at the middle part of spool 12.
In the present embodiment, valve body 11 is also provided with oil drain passage 14, oil drain passage 14 is communicated with the inner chamber that valve body 11 coordinates with slide bar portion, and oil drain passage 14 is located at the position near the first pressure oil cavity 111.The high pressure oil oozed from the second pressure oil cavity 112 to the first pressure oil cavity 111 can be discharged by this oil drain passage 14, carries out release, avoids affecting the pressure in the first pressure oil cavity 111, ensure that reliability and the accuracy of work.
The working principle of passive type overpressure unloading valve 1:
As shown in Figure 4, the oil pressure active area in the first hydraulic driving portion 121 is S
1, the oil pressure active area in the second hydraulic driving portion 122 is (S
2-S
3), the oil pressure active area in the 3rd hydraulic driving portion 123 is S
3.The oil pressure of supposing the system pressure oil circuit (working oil path 5) is P
1, the operating oil pressure of executive component 4 is P
2, do not consider the 3rd hydraulic driving portion 123 and the fitting area of boss and the elastic compression power of elastic element 13.
The pass valve power of passive type overpressure unloading valve 1 is P
1s
1, valve opening force is P
2(S
2-S
3)+P
1s
3, spool 12 be made to open, just must make P
1s
1< P
2(S
2-S
3)+P
1s
3, the oil pressure active area that the oil pressure active area due to the first hydraulic driving portion 121 is greater than the second hydraulic driving portion 122 adds the oil pressure active area sum in the 3rd hydraulic driving portion 123, also i.e. S
1> (S
2-S
3)+S
3, therefore, only at P
2> P
1when just can make P
1s
1< P
2(S
2-S
3)+P
1s
3.Like this, passive type overpressure unloading valve 1 can make executive component 4 have the operating oil pressure higher than the oil pressure of system pressure oil circuit, as the operating oil pressure P of executive component 4
2reach enough high, make P
1s
1< P
2(S
2-S
3)+P
1s
3time, spool 12 just can be driven to open and to carry out off-load.The size of executive component 4 back pressure is by S
1, S
2, S
3size determine, but when designing and producing, only can change S
1size, this is also the object the first hydraulic driving portion 121 of spool 12 being made the slider of separation, is convenient to make the passive type overpressure unloading valve 1 with different back pressure.
Above-mentioned passive type overpressure unloading valve 1, adopting three pressure oil cavities to coordinate with three hydraulic driving portions drives spool 12 to slide to control off-load, the pressure of off-load can be controlled by the hydraulic driving area rationally arranging each hydraulic driving portion, also the Maximum operating pressure of executive component 4 is namely controlled, both can ensure that executive component 4 had the working pressure higher than working oil path 5, again can high pressure oil superpressure in the working oil chamber of executive component 4 time, slide by driving spool 12 and carry out off-load; Meanwhile, its off-load is discharged in working oil path 5 by the high pressure oil in the working oil chamber of executive component 4, hydraulic energy reused, reduces the requirement of system energy supply, reach the object of energy-conserving and environment-protective, also reduce cost of production; It realizes opening and closing action by hydraulically powered mechanical structure, there will not be the situation of being failure to actuate or botching routines, ensure that the reliability of work.This passive type overpressure unloading valve 1 can directly be installed to be applied to be needed the high pressure oil off-load of high-pressure oil passage in the hydraulic system of low pressure oil way, only each pressure oil cavity directly need be connected with the pressure oil in hydraulic system, do not need to arrange other auxiliary hydraulic element and electric elementss, have structure simple, be easy to make, be active in one's movements, safe and reliable, control advantages such as facilitating.
In the present embodiment, as shown in Figure 1, perform oil cylinder 32 and be also connected with passive type overpressure unloading valve 1, the Placement of the passive type overpressure unloading valve 1 of its Placement and unidirectional oil cylinder is similar, the drain tap of passive type overpressure unloading valve 1 is also communicated with working oil path 5 simultaneously, does not repeat them here.In other embodiments, the drain tap of unidirectional oil cylinder and execution oil cylinder 32 also all can be connected to low pressure accumulator 8.
Plastic deformation of the present utility model squeezes the working principle of the hydraulic system of forging molding equipment:
The oil pump of system or hydraulic station work are by working oil path 5 pairs of pressurizing cylinder 31 injection pressure oil, pressurizing cylinder 31 action also drives the action of execution oil cylinder 32 by charged piston 33, cross-section area due to the piston of pressurizing cylinder 31 is greater than the cross-section area of the piston performing oil cylinder 32, performing its oil pressure when oil cylinder 32 drives unidirectional cylinder efficient can be supercharged to higher than the oil pressure in working oil path 5, and unidirectional in-oil cylinder oil pressure is also higher than the oil pressure in working oil path 5.Under normal circumstances, when unidirectional in-oil cylinder oil pressure is elevated to the force value of pressure gauge with electric contact setting, pressure gauge with electric contact control on-off valve is opened and is carried out release, is discharged in low pressure accumulator 8 by unidirectional in-oil cylinder high pressure oil.When pressure gauge with electric contact or on-off valve break down cannot carry out normal off-load time, namely in unidirectional oil cylinder, oil pressure can exceed the force value of pressure gauge with electric contact setting when occurring building the pressure, along with the continuation of oil pressure in unidirectional oil cylinder raises, after reaching the pressure unloading value (force value that this pressure unloading value sets than pressure gauge with electric contact is large) of passive type overpressure unloading valve 1, the spool 12 of passive type overpressure unloading valve 1 is opened, and then unidirectional in-oil cylinder high pressure oil is discharged in working oil path 5, make unidirectional in-oil cylinder oil pressure can not exceed the pressure unloading value of its setting.
The above is only preferred implementation of the present utility model, and protection domain of the present utility model is also not only confined to above-described embodiment.For those skilled in the art, do not departing from the improvement that obtains under the utility model technical conceive prerequisite and conversion also should be considered as protection domain of the present utility model.
Claims (10)
1. a plastic deformation squeezes the hydraulic system of forging molding equipment, comprise pressure oil-source (2), oil pressure pressurizing elements (3), executive component (4) and low pressure accumulator (8), described pressure oil-source (2) is connected with oil pressure pressurizing elements (3) by working oil path (5), described oil pressure pressurizing elements (3) is connected with executive component (4), it is characterized in that: described executive component (4) connects the first unloading valve group (6) being used for carrying out off-load when oil pressure reaches setting value, the drain tap of described first unloading valve group (6) is communicated with described low pressure accumulator (8) and is let out by hydraulic oil in described low pressure accumulator (8).
2. plastic deformation according to claim 1 squeezes the hydraulic system of forging molding equipment, it is characterized in that: described first unloading valve group (6) comprises the on-off valve being controlled break-make by pressure gauge with electric contact.
3. plastic deformation according to claim 1 squeezes the hydraulic system of forging molding equipment, it is characterized in that: described oil pressure pressurizing elements (3) is pressurized cylinder group, described pressurized cylinder group comprises pressurizing cylinder (31) and performs oil cylinder (32), the cross-section area of the piston of described pressurizing cylinder (31) is greater than the cross-section area of the piston of described execution oil cylinder (32), be provided with the charged piston (33) matched in the rodless cavity of described execution oil cylinder (32), the piston rod of described pressurizing cylinder (31) is connected with described charged piston (33).
4. plastic deformation according to claim 3 squeezes the hydraulic system of forging molding equipment, it is characterized in that: described execution oil cylinder (32) is connected with the second unloading valve group (7), the drain tap of described second unloading valve group (7) is communicated with described low pressure accumulator (8), and described second unloading valve group (7) is the on-off valve being controlled break-make by pressure gauge with electric contact; Described execution oil cylinder (32) is also connected with and controls by pressure oil the passive type overpressure unloading valve (1) that off-load is carried out in spool (12) slip, and the drain tap of described passive type overpressure unloading valve (1) is communicated with described working oil path (5) or described low pressure accumulator (8).
5. plastic deformation according to claim 3 squeezes the hydraulic system of forging molding equipment, it is characterized in that: described executive component (4) is unidirectional oil cylinder, described unidirectional oil cylinder is located on the piston rod of described execution oil cylinder (32), and the import of described first unloading valve group (6) is communicated with bottom the rodless cavity of described unidirectional oil cylinder.
6. plastic deformation as claimed in any of claims 1 to 5 squeezes the hydraulic system of forging molding equipment, it is characterized in that: described executive component (4) is connected with and controls by pressure oil the passive type overpressure unloading valve (1) that off-load is carried out in spool (12) slip, and the drain tap of described passive type overpressure unloading valve (1) is communicated with described working oil path (5) or described low pressure accumulator (8).
7. plastic deformation according to claim 6 squeezes the hydraulic system of forging molding equipment, it is characterized in that: described passive type overpressure unloading valve (1) comprises valve body (11) and is slidedly arranged on the spool (12) in described valve body (11), described spool (12) is provided with the first hydraulic driving portion (121) vertically successively, second hydraulic driving portion (122) and the 3rd hydraulic driving portion (123), described valve body (11) is provided with and is communicated with working oil path (5) and drives first pressure oil cavity (111) in the first hydraulic driving portion (121), be communicated with the working oil chamber of executive component (4) and drive second pressure oil cavity (112) in the second hydraulic driving portion (122) and be communicated with working oil path (5) and drive the 3rd pressure oil cavity (113) in the 3rd hydraulic driving portion (123), the driving direction in described second hydraulic driving portion (122) and the 3rd hydraulic driving portion (123) is in the same way and contrary with the driving direction in the first hydraulic driving portion (121), the oil pressure active area that the oil pressure active area in described first hydraulic driving portion (121) is greater than described second hydraulic driving portion (122) adds the oil pressure active area sum in described 3rd hydraulic driving portion (123), described spool (12) makes the working oil chamber of described executive component (4) be communicated with working oil path (5) by slip or disconnects.
8. plastic deformation according to claim 7 squeezes the hydraulic system of forging molding equipment, it is characterized in that: described spool (12) comprises the slide bar portion be slidedly arranged in described valve body (11), the one end in described slide bar portion forms described 3rd hydraulic driving portion (123), the middle part in described slide bar portion arranges boss and forms described second hydraulic driving portion (122), and described first hydraulic driving portion (121) is removably connected to the other end in described slide bar portion; Described first pressure oil cavity (111) and the 3rd pressure oil cavity (113) lay respectively at the two ends of described spool (12), and described second pressure oil cavity (112) is positioned at the middle part of described spool (12).
9. plastic deformation according to claim 7 squeezes the hydraulic system of forging molding equipment, it is characterized in that: described valve body (11) is provided with oil drain passage (14), and described oil drain passage (14) is communicated with the inner chamber that described valve body (11) coordinates with slide bar portion; Described oil drain passage (14) is located at the position near the first pressure oil cavity (111); The elastic element (13) by elastic force pressed spool (12) is provided with between described valve body (11) and spool (12).
10. plastic deformation according to claim 7 squeezes the hydraulic system of forging molding equipment, it is characterized in that: described 3rd pressure oil cavity (113) is provided with the break-make mouth (114) that the working oil chamber of described executive component (4) can be made to be communicated with working oil path (5), slides with spool (12) and described break-make mouth (114) is opened or closes in the end in described 3rd hydraulic driving portion (123); The end in described 3rd hydraulic driving portion (123) is coordinated by conical surface contact with described break-make mouth (114).
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| Application Number | Priority Date | Filing Date | Title |
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| CN201420405159.7U CN204436893U (en) | 2014-07-22 | 2014-07-22 | Plastic deformation squeezes the hydraulic system of forging molding equipment |
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| CN201420405159.7U CN204436893U (en) | 2014-07-22 | 2014-07-22 | Plastic deformation squeezes the hydraulic system of forging molding equipment |
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| CN204436893U true CN204436893U (en) | 2015-07-01 |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104088824A (en) * | 2014-07-22 | 2014-10-08 | 株洲市文佳实业有限公司 | Hydraulic system of metal plasticity swaging forming equipment |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104088824A (en) * | 2014-07-22 | 2014-10-08 | 株洲市文佳实业有限公司 | Hydraulic system of metal plasticity swaging forming equipment |
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Granted publication date: 20150701 |