CN204267432U - Steel pipe finishing machine electric-hydraulic proportion hydraulic control system - Google Patents
Steel pipe finishing machine electric-hydraulic proportion hydraulic control system Download PDFInfo
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- CN204267432U CN204267432U CN201420696283.3U CN201420696283U CN204267432U CN 204267432 U CN204267432 U CN 204267432U CN 201420696283 U CN201420696283 U CN 201420696283U CN 204267432 U CN204267432 U CN 204267432U
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Abstract
The utility model provides a kind of steel pipe finishing machine electric-hydraulic proportion hydraulic control system, this system adopts big orifice proportional reversing valve to be connected with plunger case with two fast cylinders respectively with two logical cartridge valves, moving element part is equipped with the position that boom guy type encoder detects moving element in real time, feed back to numerical control system, numerical control system controls the flow direction and the size of fluid by control ratio selector valve, the position of final controlled motion parts, finally reach pinpoint object, this system can highi degree of accuracy resetting, decrease manual operation, realization carries out finishing piecemeal to steel pipe, reach the object improving steel pipe roundness, the adjustment adoption rate relief valve of system pressure, realize the stepless changing of pressure, operating process is simplified further, the linear performance of proportion of utilization selector valve, realize the acceleration to moving element, retarded motion and function of stepless speed regulation, the reversing impact of minimizing system, inertia impact and off-load time impacting with high pressure, realize the Flexible Control of lathe.
Description
Technical field
The utility model belongs to steel pipe manufacture field, relates to hydraulic control system, is specifically related to a kind of steel pipe finishing machine electric-hydraulic proportion hydraulic control system.
Background technique
At present, steel-tube finishing machine hydraulic system is by adjustment hydraulic system remote pressure regulating valve, and adjust system pressure controls the up distance of mould.Concerning the steel pipe of same specification, pressure is higher, and distance during mould up compacting steel pipe is larger, and distance during the less mould of pressure up compacting steel pipe is less.This kind of control mode needs workman first to go measurement to find out steel pipe to need finishing set round section by artificial, secondly continuous adjust system pressure, makes the circularity that steel pipe reaches required gradually.This hydraulic control system not only requires higher to workman's qualification, and any one section of a steel pipe all needs to take multiple measurements, then successively repeatedly carry out finishing set round, operation easier is large, and manufacturing efficiency is low, low precision, be difficult to adapt to mass production, and the finishing machine hydraulic control system of the switch valve used at present and logical valve composition, cause complete machine Impact in Hydraulic System large, shorten the working life of equipment.
Model utility content
The utility model, in order to solve the problem, provides a kind of steel pipe finishing machine electric-hydraulic proportion hydraulic control system.
The utility model adopts following technological scheme:
A kind of steel pipe finishing machine electric-hydraulic proportion hydraulic control system, comprise fuel tank, described fuel tank is provided with pair vane pump Oil pump electrical machinery group and plunger pump Oil pump electrical machinery group, pair vane pump Oil pump electrical machinery group respectively pump high pressure filter little of pair vane pump and the large pump high pressure filter of pair vane pump is connected, the large pump high pressure filter of pair vane pump respectively with the A mouth of the second one-way valve, the large pump unloading valve of pair vane pump is connected, fuel tank is connected to after the large pump unloading valve of pair vane pump is connected with cooler, the B mouth of the second one-way valve respectively with the P mouth of proportional reversing valve, the B mouth of the first one-way valve connects, the A mouth of the first one-way valve respectively with plunger pump high pressure filter, plunger pump unloading valve is connected, plunger pump unloading valve is connected to fuel tank, plunger pump high pressure filter is connected to fuel tank after connecting with described plunger pump Oil pump electrical machinery group, the P mouth of proportional reversing valve is also connected with the A mouth of proportional pressure control valve, the T mouth of proportional reversing valve is connected to fuel tank, the B mouth of proportional reversing valve connects with the epicoele of safety valve, two fast cylinders respectively, and the A mouth of proportional reversing valve connects with the A mouth of plunger case oiling valve, the A mouth of the 3rd one-way valve, the B mouth of back pressure valve respectively, the A mouth of back pressure valve connects with the K mouth of one-way valve, and the B mouth of the 3rd one-way valve is connected with the cavity of resorption of two fast cylinders respectively by pipeline, is provided with the first pressure transducer in this pipeline, the B mouth of plunger case oiling valve is connected to the cavity of resorption of plunger case by pipeline, be provided with the second pressure transducer in this pipeline, and another B mouth of plunger case oiling valve connects with the A mouth of unloading valve and K mouth respectively, and the B mouth of unloading valve connects with low pressure direct-acting overflow valve, plunger case is provided with liquid-filling valve, liquid-filling valve respectively with damping larynx, one-way throttle valve connects, fuel tank is passed to after damping larynx is connected with stop valve, one-way throttle valve connects with the B mouth of solenoid valve, the T mouth of solenoid valve is connected to fuel tank, the P mouth of solenoid valve divides two-way, the first via connects with the K mouth of plunger case oiling valve, second tunnel connects with accumulator, accumulator respectively with accumulator stop valve, accumulator safety valve, 3rd pressure transducer connects, pressure transducer connects with pressure gauge, accumulator stop valve connects with one-way valve, one-way valve is the little pump high pressure filter with pair vane pump respectively, the little pump unloading valve of vane pump connects, the little pump unloading valve of vane pump is connected to fuel tank.
Be provided with in the A mouth connecting pipeline of plunger pump high pressure filter and the first one-way valve in the A mouth connecting pipeline of pressure testing point M1, pair vane pump large pump high pressure filter and the second one-way valve in the connecting pipeline being provided with pressure testing point M2, the little pump high pressure filter of pair vane pump and one-way valve and be provided with pressure testing point M3; Install in the pipeline that pipeline is provided with pressure testing point MX1, the B mouth of proportional reversing valve connects with the epicoele of two fast cylinders of the first pressure transducer in the pipeline being provided with pressure testing point MX3 and installing the second pressure transducer and be provided with pressure testing point MX2.
The beneficial effects of the utility model are: system of the present utility model adopts big orifice proportional reversing valve to be connected with plunger case with two fast cylinders respectively with two logical cartridge valves, moving element part is equipped with the position that boom guy type encoder detects moving element in real time, feed back to numerical control system, numerical control system controls the flow direction and the size of fluid by control ratio selector valve, the position of final controlled motion parts, finally reach pinpoint object, this system can highi degree of accuracy resetting, decrease manual operation, realization carries out finishing piecemeal to steel pipe, reach the object improving steel pipe roundness, precision is high, the adjustment adoption rate relief valve of system pressure, realizes the stepless changing of pressure, further reduces manual operation, operating process is simplified further, improves manufacturing efficiency, the linear performance of the utility model proportion of utilization selector valve, realizes the function of the acceleration to moving element, retarded motion and stepless speed regulation, can reduce the reversing impact of system, inertia impact and off-load time impacting with high pressure, the Flexible Control of lathe can be realized.
Accompanying drawing explanation
Fig. 1. be control system figure of the present utility model.
Reference character: 1-plunger pump unloading valve; 2-plunger pump high pressure filter; 3-plunger pump Oil pump electrical machinery group;
4-first one-way valve; The large pump unloading valve of 5-pair vane pump; 6-cooler; The large pump high pressure filter of 7-pair vane pump; 8-second one-way valve; 9-pair vane pump Oil pump electrical machinery group; The little pump high pressure filter of 10-pair vane pump; The little pump unloading valve of 11-vane pump; 12-one-way valve; 13-accumulator stop valve; 14-accumulator safety valve; 15-the 3rd pressure transducer; 16-pressure gauge; 17-proportional pressure control valve; 18-accumulator; 19-back pressure valve; 20-solenoid valve; 21-the 3rd one-way valve; 22-one-way throttle valve; 23-first pressure transducer; 24-stop valve; 25-damping larynx; 26-liquid-filling valve; 27,30-fast cylinder; 28-plunger case; 29-moved cross beam and finishing mold; 31-boom guy type encoder; 32-pressure gauge; 33-second pressure transducer; 34-plunger case oiling valve; 35-unloading valve; 36-low pressure direct-acting overflow valve; 37-safety valve; 38-proportional reversing valve; 39-pressure gauge; 40-fuel tank; M1, M2, M3, MX1, MX2, MX3 are pressure testing point.
Embodiment
Below in conjunction with accompanying drawing, the utility model is described in further detail:
A kind of steel pipe finishing machine electric-hydraulic proportion hydraulic control system, comprise fuel tank, described fuel tank is provided with pair vane pump Oil pump electrical machinery group and plunger pump Oil pump electrical machinery group, pair vane pump Oil pump electrical machinery group is connected with the large pump high pressure filter of pair vane pump respectively at pair vane pump little pump high pressure filter, the large pump high pressure filter of pair vane pump respectively with the A mouth of the second one-way valve, the large pump unloading valve of pair vane pump is connected, fuel tank is connected to after the large pump unloading valve of pair vane pump is connected with cooler, the B mouth of the second one-way valve respectively with the P mouth of proportional reversing valve, the B mouth of the first one-way valve connects, the A mouth of the first one-way valve is respectively at plunger pump high pressure filter, plunger pump unloading valve is connected, plunger pump unloading valve is connected to fuel tank, plunger pump high pressure filter is connected to fuel tank after connecting with plunger pump Oil pump electrical machinery group, the P mouth of proportional reversing valve is also connected with the A mouth of proportional pressure control valve, the T mouth of proportional reversing valve is connected to fuel tank, the B mouth of proportional reversing valve connects with the epicoele of safety valve, two fast cylinders respectively, and the A mouth of proportional reversing valve connects with the A mouth of plunger case oiling valve, the A mouth of the 3rd one-way valve, the B mouth of back pressure valve respectively, the A mouth of back pressure valve connects with the K mouth of one-way valve, and the B mouth of the 3rd one-way valve is connected with the cavity of resorption of two fast cylinders respectively by pipeline, is provided with the first pressure transducer in this pipeline, the B mouth of plunger case oiling valve is connected to the cavity of resorption of plunger case by pipeline, be provided with the second pressure transducer in this pipeline, and another B mouth of plunger case oiling valve connects with the A mouth of unloading valve and K mouth respectively, and the B mouth of unloading valve connects with low pressure direct-acting overflow valve, plunger case is provided with liquid-filling valve, liquid-filling valve is respectively at damping larynx, one-way throttle valve connects, fuel tank is passed to after damping larynx is connected with stop valve, one-way throttle valve connects with the B mouth of solenoid valve, the T mouth of solenoid valve is connected to fuel tank, the P mouth of solenoid valve divides two-way, the first via connects with the K mouth of plunger case oiling valve, second tunnel connects with accumulator, accumulator respectively with accumulator stop valve, accumulator safety valve, 3rd pressure transducer connects, 3rd pressure transducer connects with pressure gauge, accumulator stop valve connects with one-way valve, one-way valve is the little pump high pressure filter with pair vane pump respectively, the little pump unloading valve of vane pump connects, the little pump unloading valve of vane pump is connected to fuel tank.In the A mouth connecting pipeline of plunger pump high pressure filter and the first one-way valve, in the A mouth connecting pipeline of pair vane pump large pump high pressure filter and the second one-way valve, in the connecting pipeline of the little pump high pressure filter of pair vane pump and one-way valve, be equipped with pressure testing point; The pipeline of the first pressure transducer is installed, is equipped with pressure testing point in the pipeline of pipeline that the B mouth of proportional reversing valve connects with the epicoele of two fast cylinders and setting pressure sensor.
Complete steel pipe finishing machine finishing mold fast on, work is entered, suppress, pressurize, off-load and return.
Fast upper: proportional pressure control valve 1Y1, proportional reversing valve 1Y3, solenoid valve YV1, YV2 obtains electric, the vane pump of pair vane pump Oil pump electrical machinery group 9, the fluid that the plunger pump of plunger pump Oil pump electrical machinery group 3 is got, A mouth through the second one-way valve 8 and the first one-way valve 4 enters B mouth and enters the P mouth of proportional reversing valve 38 and the A mouth of proportional pressure control valve 17, because now proportional pressure control valve 17 is in closed condition, so the A mouth of proportional pressure control valve 17 is different from B mouth, so fluid enters the P mouth of proportional reversing valve 38, now because proportional reversing valve is in commutation position, namely P and A leads to, the state that B and T is logical, therefore fluid passing ratio selector valve P mouth enters proportional reversing valve A mouth, proportional reversing valve A mouth and valve 21 A mouth, valve 19B mouth is connected, valve 21 is opened, valve 19 is in closed condition.Fluid enters the 3rd one-way valve 21B mouth by the 3rd one-way valve 21A mouth, 3rd one-way valve 21B mouth is connected with two fast cylinders 27,30 rodless cavity, fluid enters two fast cylinder rodless cavities, fast cylinder fast uplink, fast cylinder drives plunger case 28 fast uplink, and liquid-filling valve 26 self-priming is opened, and fluid a large amount of in fuel tank 40 enters plunger case through stop valve 24, damping larynx 25, liquid-filling valve 26, the fluid of fast cylinder epicoele, through proportional reversing valve B mouth oil sump tank, realizes the fast uplink of finishing mold.
Work is entered: proportional pressure control valve 1Y1, proportional reversing valve 1Y3, solenoid valve YV1, YV2, YV4 obtains electric, plunger case oiling valve 34 is opened, the vane pump that pair vane pump Oil pump electrical machinery group 9 drives, the fluid that the plunger pump that plunger pump Oil pump electrical machinery group 3 drives is got, a part is through the second one-way valve 8, first one-way valve 4, 3rd one-way valve 21, proportional reversing valve 38 right A mouths enter two fast cylinder rodless cavities, the fluid of fast cylinder rod chamber is through the B mouth oil sump tank of proportional reversing valve 38, because proportional reversing valve A mouth is connected with valve 34A mouth, valve 34 is opened, the A mouth of valve 34 and two B mouths are connected, fluid also enters plunger case through plunger case oiling valve 34 simultaneously, plunger case pressure raises, liquid-filling valve cuts out, finishing mold enters work and enters state.Unloading valve 35 is now in closed condition, and therefore the A mouth of unloading valve 35 and B mouth are obstructed, and fluid all enters plunger case.
Compacting: finishing mold continues up under work enters state, after touching steel pipe, system pressure raises gradually, when reaching the pressure set by the first pressure transducer 23 of being connected with fast cylinder, electromagnet YV2 power-off, the large pump unloading valve 5 of pair vane pump is opened, the fluid that vane pump is got enters B mouth through the A mouth of the large pump unloading valve 5 of pair vane pump, B mouth is communicated with fuel tank, the direct oil sump tank of fluid that vane pump is got, vane pump off-load.Second one-way valve 8 is in high pressure conditions due to K mouth, the second one-way valve 8B mouth and A mouth obstructed, the second one-way valve 8 is closed.Plunger pump 3 continues to two fast cylinders 27,30 and plunger case 28 fuel feeding, and system pressure continues to raise, and finishing mold press against steel pipe and continues up, until when reaching desired value set by numerical control system, steel-tube finishing is complete, and system enters packing state.
Pressurize: during pressurize, plunger pump continues to each oil cylinder fuel feeding, now on numerical control system and moved cross beam 29, institute's anchoring encoder 31 interacts, finishing mold is made to remain on set position by proportional reversing valve in adjust system 38, the unnecessary fluid of system falls through proportional pressure control valve 17 overflow, finishing mold press against steel pipe in set position, keep a bit of time (0-3 second), realize the pressurize of system, after pressurize completes, system enters unloading condition.
Off-load: when off-load starts, solenoid valve YV1, proportional pressure control valve 1Y1, solenoid valve YV4 power-off, rear electromagnetic valve YV3, YV5 obtain electric, back pressure valve 19 is opened, and A mouth is communicated with B mouth; Unloading valve 35 is opened, and A mouth is communicated with B mouth.Opening of the reverse pointwise of proportional reversing valve 38 simultaneously, namely commutates to left position gradually, and the high pressure oil of two fast cylinder rodless cavities is through back pressure valve 19, proportional reversing valve (A and T leads to) oil sump tank.Plunger case high pressure oil through unloading valve 35, low pressure direct-acting overflow valve 36 oil sump tank.When the pressure of plunger case is discharged to the pressure set by the pressure transducer 33 be connected with plunger case, YV4 obtains electric, the pressure oil of plunger case enters into Proportional valve A mouth, along with the increase gradually of Proportional valve opening, three further releases of oil cylinder until a very low force value time, off-load complete (unloading time 0-1 second), system enters return state.
Return: off-load terminates, solenoid valve YV4, YV5 power-off, plunger case oiling valve 34, unloading valve 35 are closed, solenoid valve YV3 obtains electric, proportional reversing valve 1Y2 obtains electric, commutate to left position gradually, namely P and B leads to, A and T leads to, and reaches rapidly maximum, simultaneously solenoid valve YV1, YV2, YV6, proportional pressure control valve 1Y1 obtain electric, and the fluid got of oil pump enters two fast cylinder epicoeles (rod chamber) through proportional reversing valve left position P and B is logical, and the fluid of rodless cavity leads to oil sump tank through back pressure valve 19, proportional reversing valve A and T simultaneously; Solenoid valve 20 commutates to left position, P and B leads to, high pressure oil in accumulator, enter liquid-filling valve and control mouth, liquid-filling valve 26 is opened, and the fluid of plunger case returns fuel tank 40 via liquid-filling valve, damping larynx 25, stop valve 24 under the drive of fast cylinder, and three oil cylinders are retracted, finishing mold throws off steel pipe, and a finishing procedure is finished.
In whole finishing mold course of action, numerical control system, electric-hydraulic proportion hydraulic control system, boom guy type encoder 31 three combines closely formation closed loop control system, finishing machine mould 29 position data detected in real time is constantly fed back to numerical control system by boom guy type encoder, numerical control system by with the comparing of desired value, then control command is sent to electric-hydraulic proportion hydraulic control system, adjustment finishing mold position, position data is fed back to again a closed loop control system of numerical control system by boom guy type encoder, therefore the utility model has higher repetitive positioning accuracy.For the steel pipe of same specification, not round dot is found out after steel pipe is transported to finishing mold by step feeding device, just can carry out finishing set round to it, this reduces tubulation line finishing machine in the past, be repeated measurement and adjustment by people, the complex process of final certainty annuity parameters, simplifies workflow, increases work efficiency.Accumulator 18 provides stable control power oil sources for proportional reversing valve and plunger case oiling valve 34.The 3rd pressure transducer 15 be connected with accumulator, be used to control electromagnet YV7 electric and dead electricity, control the little pump unloading valve 11 of vane pump and open and close, finally control the little pump of pair vane pump to accumulator whether repairing with this.Accumulator safety valve 14 pairs of accumulators play the effect of safety protection.Accumulator and the little pump unloading valve 11 of vane pump cut off by one-way valve 12, play the effect of pressurize; The effect of buffering is played in the open and close of two one-way throttle valves, 22 pairs of topping ups.What in figure, three pressure gauges 16,32,39 showed respectively is energy storage pressure, plunger case, fast cylinder rodless cavity pressure.Linear performance during Proportional valve work, Proportional valve commutation is opening or closedown gradually gradually, this just distinguishes the open and close of switch valve in the past, finishing machine can be realized, in finishing set round process, above fast and work enters smooth transition, inertia impact when release rate changes suddenly, and the opening procedure that during off-load, Proportional valve valve port is ascending gradually, realize the steady off-load of system, because the transition between operating mode each in the middle of whole finishing is stable, so off-load is steady, realize the Flexible Control to whole finishing.
Claims (2)
1. a steel pipe finishing machine electric-hydraulic proportion hydraulic control system, it is characterized in that: comprise fuel tank, described fuel tank is provided with pair vane pump Oil pump electrical machinery group (9) and plunger pump Oil pump electrical machinery group (3), pair vane pump Oil pump electrical machinery group (9) respectively pump high pressure filter (10) little of pair vane pump and the large pump high pressure filter (7) of pair vane pump is connected, the large pump high pressure filter (7) of pair vane pump respectively with the A mouth of the second one-way valve (8), the large pump unloading valve (5) of pair vane pump is connected, fuel tank is connected to after the large pump unloading valve (5) of pair vane pump is connected with cooler (6), the B mouth of the second one-way valve (8) respectively with the P mouth of proportional reversing valve (38), the B mouth of the first one-way valve (4) connects, the A mouth of the first one-way valve (4) respectively with plunger pump high pressure filter (2), plunger pump unloading valve (1) is connected, plunger pump unloading valve (1) is connected to fuel tank, plunger pump high pressure filter (2) is connected to fuel tank after connecting with described plunger pump Oil pump electrical machinery group (3), the P mouth of proportional reversing valve (38) is also connected with the A mouth of proportional pressure control valve (17), the T mouth of proportional reversing valve (38) is connected to fuel tank, the B mouth of proportional reversing valve (38) connects with the epicoele of safety valve (37), two fast cylinders respectively, and the A mouth of proportional reversing valve (38) connects with the A mouth of plunger case oiling valve (34), the A mouth of the 3rd one-way valve (21), the B mouth of back pressure valve (19) respectively, the A mouth of back pressure valve (19) connects with the K mouth of one-way valve (21), and the B mouth of the 3rd one-way valve (21) is connected with the cavity of resorption of two fast cylinders respectively by pipeline, is provided with the first pressure transducer (23) in this pipeline, the B mouth of plunger case oiling valve (34) is connected to the cavity of resorption of plunger case (28) by pipeline, second pressure transducer (33) is installed in this pipeline, another B mouth of plunger case oiling valve (34) connects with the A mouth of unloading valve (35) and K mouth respectively, and the B mouth of unloading valve (35) connects with low pressure direct-acting overflow valve (36), plunger case (28) is provided with liquid-filling valve (26), liquid-filling valve (26) respectively with damping larynx (25), one-way throttle valve (22) connects, damping larynx (25) passes to fuel tank (40) after being connected with stop valve (24), one-way throttle valve (22) connects with the B mouth of solenoid valve (20), the T mouth of solenoid valve (20) is connected to fuel tank, the P mouth of solenoid valve (20) divides two-way, the first via connects with the K mouth of plunger case oiling valve (34), second tunnel connects with accumulator (18), accumulator (18) respectively with accumulator stop valve (13), accumulator safety valve (14), 3rd pressure transducer (15) connects, pressure transducer (15) connects with pressure gauge (16), accumulator stop valve (13) connects with one-way valve (12), one-way valve (12) is the little pump high pressure filter (10) with pair vane pump respectively, the little pump unloading valve (11) of vane pump connects, the little pump unloading valve (11) of vane pump is connected to fuel tank.
2. a kind of steel pipe finishing machine electric-hydraulic proportion hydraulic control system according to claim 1, is characterized in that: be provided with in the A mouth connecting pipeline of plunger pump high pressure filter (2) and the first one-way valve (4) in pressure testing point M1, pair vane pump large pump high pressure filter (7) and the A mouth connecting pipeline of the second one-way valve (8) to be provided with in pressure testing point M2, the little pump high pressure filter (10) of pair vane pump and the connecting pipeline of one-way valve (12) and be provided with pressure testing point M3; Install in the pipeline that pipeline is provided with pressure testing point MX1, the B mouth of proportional reversing valve (38) connects with the epicoele of two fast cylinders of the first pressure transducer (23) in the pipeline being provided with pressure testing point MX3 and installing the second pressure transducer (33) and be provided with pressure testing point MX2.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420696283.3U CN204267432U (en) | 2014-11-19 | 2014-11-19 | Steel pipe finishing machine electric-hydraulic proportion hydraulic control system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420696283.3U CN204267432U (en) | 2014-11-19 | 2014-11-19 | Steel pipe finishing machine electric-hydraulic proportion hydraulic control system |
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| Publication Number | Publication Date |
|---|---|
| CN204267432U true CN204267432U (en) | 2015-04-15 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201420696283.3U Expired - Fee Related CN204267432U (en) | 2014-11-19 | 2014-11-19 | Steel pipe finishing machine electric-hydraulic proportion hydraulic control system |
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| CN (1) | CN204267432U (en) |
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105221497A (en) * | 2015-10-27 | 2016-01-06 | 天津市天锻压力机有限公司 | High speed pre-shaping hydraulic press hydraulic control system |
| CN105298945A (en) * | 2015-11-27 | 2016-02-03 | 南通锻压设备股份有限公司 | Hydraulic system of quick pressing type hydraulic press |
| CN107288959A (en) * | 2017-08-09 | 2017-10-24 | 江苏理工学院 | A kind of large hydraulic press crossbeam leveling hydraulic system |
| CN107344424A (en) * | 2017-04-17 | 2017-11-14 | 扬力集团股份有限公司 | The hydraulic control system of two point high-speed blanking press |
| CN110486342A (en) * | 2019-07-25 | 2019-11-22 | 太原重工股份有限公司 | Prebending machine hydraulic control system and method |
| CN114183415A (en) * | 2021-12-13 | 2022-03-15 | 杭州越达图谱科技有限公司 | Efficient heavy-load press-fitting machine hydraulic system |
-
2014
- 2014-11-19 CN CN201420696283.3U patent/CN204267432U/en not_active Expired - Fee Related
Cited By (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105221497A (en) * | 2015-10-27 | 2016-01-06 | 天津市天锻压力机有限公司 | High speed pre-shaping hydraulic press hydraulic control system |
| CN105221497B (en) * | 2015-10-27 | 2017-07-14 | 天津市天锻压力机有限公司 | High speed preformation type hydraulic machine hydraulic control system |
| CN105298945A (en) * | 2015-11-27 | 2016-02-03 | 南通锻压设备股份有限公司 | Hydraulic system of quick pressing type hydraulic press |
| CN107344424A (en) * | 2017-04-17 | 2017-11-14 | 扬力集团股份有限公司 | The hydraulic control system of two point high-speed blanking press |
| CN107344424B (en) * | 2017-04-17 | 2023-06-02 | 扬力集团股份有限公司 | Hydraulic control system of double-point high-speed press |
| CN107288959A (en) * | 2017-08-09 | 2017-10-24 | 江苏理工学院 | A kind of large hydraulic press crossbeam leveling hydraulic system |
| CN107288959B (en) * | 2017-08-09 | 2019-06-11 | 江苏理工学院 | A kind of large hydraulic press crossbeam leveling hydraulic system |
| CN110486342A (en) * | 2019-07-25 | 2019-11-22 | 太原重工股份有限公司 | Prebending machine hydraulic control system and method |
| CN114183415A (en) * | 2021-12-13 | 2022-03-15 | 杭州越达图谱科技有限公司 | Efficient heavy-load press-fitting machine hydraulic system |
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| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20150415 Termination date: 20151119 |
|
| EXPY | Termination of patent right or utility model |