CN105598334B - A kind of hydraulic system of elastomeric material forging and stamping - Google Patents
A kind of hydraulic system of elastomeric material forging and stamping Download PDFInfo
- Publication number
- CN105598334B CN105598334B CN201610090593.4A CN201610090593A CN105598334B CN 105598334 B CN105598334 B CN 105598334B CN 201610090593 A CN201610090593 A CN 201610090593A CN 105598334 B CN105598334 B CN 105598334B
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- Prior art keywords
- valve
- hydraulic fluid
- fluid port
- oil
- master cylinder
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Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21J—FORGING; HAMMERING; PRESSING METAL; RIVETING; FORGE FURNACES
- B21J9/00—Forging presses
- B21J9/10—Drives for forging presses
- B21J9/12—Drives for forging presses operated by hydraulic or liquid pressure
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21J—FORGING; HAMMERING; PRESSING METAL; RIVETING; FORGE FURNACES
- B21J9/00—Forging presses
- B21J9/10—Drives for forging presses
- B21J9/20—Control devices specially adapted to forging presses not restricted to one of the preceding subgroups
Abstract
The present invention relates to a kind of hydraulic system for forging and pressing elastomeric material, it includes crescent gear pump, servomotor, inserted valve valve group, executing agency；Wherein described servomotor drives inside engaged gear pump work by power transmission shaft, and described inserted valve valve group, between the leakage fluid dram of crescent gear pump and the executing agency of hydraulic press, the pressure fluid flowed out from described crescent gear pump leakage fluid dram does work through inserted valve valve group and by the control of inserted valve valve group to the executing agency of the hydraulic press at a flow way.The invention further relates to the hydraulic press for including the hydraulic system.
Description
Technical field
The present invention relates to a kind of hydraulic press system, the hydraulic pressure system of more particularly to a kind of hydraulic press for elastomeric material processing
System.
Background technology
The present invention is using on the hydraulic press of the post of three beam four, and for the processing of elastomeric material, in general is used to process elasticity
The hydraulic system that the hydraulic press of material uses is relatively simple, and a processing side for dynamic formula is substantially when processing elastomeric material
Method, this hydraulic system more optimize in control system, and a dynamic formula processing method and auto-manual system system of processing are combined, made
The material of processing is more convenient, and can control the step of processing at any time, while is easily put into and is taken out, and improves processing elastomeric material
Speed.
The content of the invention
The technical problem to be solved in the present invention is to provide a kind of hydraulic system that can be easy to process elastomeric material.
In order to solve the above technical problems, the technical scheme is that：
A kind of hydraulic system of elastomeric material forging and stamping, its innovative point are：Including crescent gear pump, servomotor, hold
Row mechanism and inserted valve valve group；Servomotor drives inside engaged gear pump work by power transmission shaft, and inserted valve valve group is positioned at interior
Between the leakage fluid dram of intermeshing gear pump and the executing agency of hydraulic press；
The executing agency includes master cylinder and taken blame for others, and master cylinder is connected in the oil circuit of inserted valve valve group with taking blame for others, main
Cylinder includes hydraulic fluid port A1, hydraulic fluid port B1, is connected with a replenishing valve a on master cylinder, takes blame for others including hydraulic fluid port A2, hydraulic fluid port B2；
The inserted valve valve group includes master cylinder oil circuit and oil circuit of taking blame for others, and master cylinder oil circuit includes middle closed 3-position 4-way electricity
Magnet valve, overflow valve, replenishing valve, two-position two-way solenoid valve, fuel tank and adjustable throttling, middle closed three position four-way electromagnetic valve bag
Oil scraper port a, hydraulic fluid port b, hydraulic fluid port c and hydraulic fluid port d, hydraulic fluid port c are connected with the oil-out of crescent gear pump, and replenishing valve c and overflow valve c is simultaneously
Connection, the oil circuit one end in parallel are connected on hydraulic fluid port a by oil pipe, and the other end is connected to the A1 oil ports of master cylinder, the B1 oil of master cylinder
A replenishing valve b is in series with behind mouthful, replenishing valve b is connected on by oil pipe at the hydraulic fluid port b of middle closed three position four-way electromagnetic valve,
An overflow valve is parallel between the middle closed three-position four-way electromagnetic directional valve oil circuit in parallel with replenishing valve c, overflow valve c
D, connected between overflow valve d and replenishing valve a, an oil is parallel between overflow valve c, replenishing valve c parallel connections oil circuit and master cylinder A1 hydraulic fluid ports
Road, its one end are connected between on the hydraulic fluid port c of closed three position four-way electromagnetic valve, and replenishing valve d and two has been sequentially connected in series on oil circuit
Position four-way solenoid valve a, one is connected with the oil pipe between master cylinder B1 hydraulic fluid ports and replenishing valve b by adjustable throttling and bi-bit bi-pass electricity
The oil circuit of magnet valve series connection；
The oil circuit of taking blame for others includes intermediary press formula three position four-way electromagnetic valve, replenishing valve e and two-position four-way solenoid valve b, in
Between adding pressure type three position four-way electromagnetic valve include hydraulic fluid port e, hydraulic fluid port f, hydraulic fluid port g and hydraulic fluid port h, intermediary press formula three position four-way electromagnetic valve
Hydraulic fluid port g is connected with the hydraulic fluid port d of intermediate seal formula three position four-way electromagnetic valve, the hydraulic fluid port h of intermediary press formula three position four-way electromagnetic valve with
Crescent gear pump is connected, and the hydraulic fluid port e of intermediary press formula three position four-way electromagnetic valve is connected with the B2 hydraulic fluid ports taken blame for others, the A2 oil taken blame for others
Mouth is connected with a replenishing valve e, and replenishing valve e is connected with the hydraulic fluid port f of intermediary press formula three position four-way electromagnetic valve, in intermediary press formula three
An overflow valve b is parallel with oil circuit between the hydraulic fluid port e of position four-way solenoid valve and the B2 hydraulic fluid ports taken blame for others, in A2 hydraulic fluid ports of taking blame for others with filling
An overflow valve a is parallel between liquid valve e, two-position four-way solenoid valve c is also being parallel between A2 hydraulic fluid ports and replenishing valve e taking blame for others,
A non-adjustable restrictor is in series with two-position four-way solenoid valve c, two-position four-way solenoid valve b is in parallel with an overflow valve e, and this is simultaneously
Connection oil circuit one end is connected in parallel between crescent gear pump and middle closed three position four-way electromagnetic valve hydraulic fluid port c, and the other end is connected in parallel on
Between cooler and middle closed three position four-way electromagnetic valve hydraulic fluid port d.
Further, in addition to 4 pressure gauges, it is connected in parallel on respectively at the oil-out of crescent gear pump, the B2 oil taken blame for others
At mouthful, the A2 oil ports taken blame for others, the B1 oil ports of master cylinder；Pressure sensor has 2, is parallel to going out for crescent gear pump respectively
The B1 oil ports of liquid mouth and master cylinder；
Further, the cooler is arranged on the side of crescent gear pump.
Further, it is in series with a remote control overflow valve on the ejection pressure adjustment relief valve a to take blame for others.
The advantage of the invention is that：
The hydraulic system, it is more convenient in terms of elastomeric material is processed by the combination of crawl and semi-automatic processing mode,
Pressure release electromagnetic valve and pressure adjustment relief valve in hydraulic system can adjust the pressure taken blame for others with master cylinder, the electromagnetism of system pressure at any time
The pressure that valve can be reacted by pressure gauge at any time increases the security of system regulation, inserted valve valve group come the pressure of control system
System level is clearly demarcated, and travelling mechanism is convenient, easy to operate, improves production efficiency.
Brief description of the drawings
The present invention is further detailed explanation with reference to the accompanying drawings and detailed description.
The schematic diagram of Fig. 1 hydraulic systems.
Fig. 2 is magnetic valve action schedule.
Shown in Fig. 1：1st, crescent gear pump；2nd, servomotor；3rd, inserted valve valve group；4th, remote control overflow valve；8、
Cooler；11st, middle closed three position four-way electromagnetic valve；12nd, two-position two-way solenoid valve；14th, adjustable throttling；15th, it is middle to add
Pressure type three position four-way electromagnetic valve；
Embodiment
The following examples can make professional and technical personnel that the present invention be more fully understood, but therefore not send out this
It is bright to be limited among described scope of embodiments.
A kind of hydraulic pressure machining system as shown in Figure 1 includes：
A kind of hydraulic system of elastomeric material forging and stamping, including crescent gear pump 1, servomotor 2, executing agency and inserting
Valve valve group 3；Servomotor 2 drives crescent gear pump 1 to work by power transmission shaft, and inserted valve valve group 3 is located inside engaged gear
Between the leakage fluid dram of pump 2 and the executing agency of hydraulic press.
Executing agency includes master cylinder 9a and the 9b that takes blame for others, master cylinder 9a are connected to the oil circuit of inserted valve valve group 3 with the 9b that takes blame for others
In, master cylinder includes hydraulic fluid port A1, hydraulic fluid port B1, is connected with a replenishing valve 5a on master cylinder, takes blame for others including hydraulic fluid port A2, hydraulic fluid port B2.
Inserted valve valve group 3 includes master cylinder oil circuit and oil circuit of taking blame for others, and master cylinder oil circuit includes middle closed 3-position 4-way electromagnetism
Valve 11, overflow valve 13, replenishing valve, two-position two-way solenoid valve 12, fuel tank and adjustable throttling 14, middle closed 3-position 4-way electricity
Magnet valve 11 includes hydraulic fluid port a, hydraulic fluid port b, hydraulic fluid port c and hydraulic fluid port d, and hydraulic fluid port c is connected with the oil-out of crescent gear pump 1, replenishing valve 5c
In parallel with overflow valve 13c, the oil circuit one end in parallel is connected on hydraulic fluid port a by oil pipe, and the other end is connected to master cylinder 9a A1 oil
At mouthful, a replenishing valve 5b is in series with behind master cylinder 9a B1 hydraulic fluid ports, replenishing valve 5b is connected on middle closed three by oil pipe
It is in parallel with replenishing valve 5c, overflow valve 13c in middle closed three position four-way electromagnetic valve 11 at the hydraulic fluid port b of four way solenoid valve 11
An overflow valve 13d is parallel between oil circuit, is connected between overflow valve 13d and replenishing valve 5a, overflow valve 13c, replenishing valve 5c are simultaneously
An oil circuit is parallel between connection oil circuit and master cylinder A1 hydraulic fluid ports, its one end is connected between the oil of closed three position four-way electromagnetic valve 11
On mouth c, replenishing valve 5d and two-position four-way solenoid valve 10a are sequentially connected in series on oil circuit, between master cylinder B1 hydraulic fluid ports and replenishing valve 5b
An oil circuit connected by adjustable throttling 14 with two-position two-way solenoid valve 12 is connected with oil pipe；
Oil circuit of taking blame for others includes intermediary press formula three position four-way electromagnetic valve 15, replenishing valve 5e and two-position four-way solenoid valve 10b, in
Between adding pressure type three position four-way electromagnetic valve 15 include hydraulic fluid port e, hydraulic fluid port f, hydraulic fluid port g and hydraulic fluid port h, intermediary press formula three position four-way electromagnetic valve
15 hydraulic fluid port g is connected with the hydraulic fluid port d of intermediate seal formula three position four-way electromagnetic valve 11, intermediary press formula three position four-way electromagnetic valve 15
Hydraulic fluid port h is connected with crescent gear pump 1, and the hydraulic fluid port e of intermediary press formula three position four-way electromagnetic valve 15 is connected with the B2 hydraulic fluid ports taken blame for others,
The 9b A2 hydraulic fluid ports of taking blame for others are connected with a replenishing valve 5e, replenishing valve 5e and intermediary press formula three position four-way electromagnetic valve 15 hydraulic fluid port f phases
Even, one is parallel with the oil circuit between the hydraulic fluid port e and the 9b that takes blame for others of intermediary press formula three position four-way electromagnetic valve 15 B2 hydraulic fluid ports to overflow
Valve 13b is flowed, an overflow valve 13a is parallel between A2 hydraulic fluid ports and replenishing valve 5e taking blame for others, in A2 hydraulic fluid ports and the replenishing valve 5e of taking blame for others
Between be also parallel with two-position four-way solenoid valve 10c, be in series with a non-adjustable restrictor on two-position four-way solenoid valve 10c, two
Position four-way solenoid valve 10b is in parallel with an overflow valve 13e, and the oil circuit one end in parallel is connected in parallel on crescent gear pump 1 and closed with middle
Between the hydraulic fluid port c of formula three position four-way electromagnetic valve 11, the other end is connected in parallel on cooler and the middle closed oil of three position four-way electromagnetic valve 11
Between mouth d.
Pressure gauge has 4, is connected in parallel on respectively at the oil-out of crescent gear pump 1, and the B2 oil ports for the 9b that takes blame for others, take blame for others 9b
A2 oil ports, master cylinder 9a B1 oil ports.
Pressure sensor has 2, is parallel to the liquid outlet of crescent gear pump 1 and master cylinder 9a B1 oil ports respectively.
Cooler 8 is arranged on the side of crescent gear pump, and the servo-drive system of hydraulic system is cooled down.
Remote control overflow valve 4, it is connected on the ejection pressure adjustment relief valve 13a for the 9b that takes blame for others, remote control overflow valve.
The operation principle of hydraulic system of elastomeric material forging and stamping is：
Hydraulic system at work, master cylinder oil circuit control master cylinder 9a it is fast under, compacting, the action of backhaul 3.
The running situation of action master cylinder oil circuit is under fast：The effect for the crescent gear pump 1 that liquid drives in servomotor 2
After be divided into two-way, two-position four-way solenoid valve 10a is entered by conveyance conduit all the way, another way by hydraulic fluid port c enter among it is closed
Three position four-way electromagnetic valve 11, electromagnet YA1 open electric, and liquid is by middle closed three position four-way electromagnetic valve 11 by hydraulic fluid port b
Outflow, hydraulic oil are eventually entered into master cylinder 9a, liquid top, which is opened, all the way fills by the replenishing valve 5b behind magnetic valve by B1 mouths
Liquid valve 5d, electromagnet YA5 open electric, control replenishing valve 5d opening, and liquid is from the outspoken speed outflows of A1, by replenishing valve 5d,
Rapidly enter fuel tank, electromagnet YA8 open electric control system pressure, other electromagnet must not be turned off electricity, realize master cylinder
9a fast lower action.
Compacting action master cylinder oil circuit running situation be：The effect for the crescent gear pump 1 that liquid drives in servomotor 2
After be divided into two-way, two-position four-way solenoid valve 10a is entered by conveyance conduit all the way, another way by hydraulic fluid port c enter among it is closed
Three position four-way electromagnetic valve 11, electromagnet YA1 open electric, and liquid is by middle closed three position four-way electromagnetic valve 11 by hydraulic fluid port b
Outflow, then the replenishing valve 5b by being connected to behind magnetic valve, finally entered by B1 mouths in master cylinder 9a, electromagnet YA5 is closed not
Must be electric, replenishing valve 5d is not turned on so that liquid can not pass through overflow by two-position four-way valve 10a, liquid after the outflow of A1 mouths
Valve 13c, then pass through middle closed three position four-way electromagnetic valve 11 and fuel tank is directly entered by hydraulic fluid port d outflows, electromagnet YA8 is opened
The pressure of electric control system, other electromagnet must not be turned off electricity, realize master cylinder 9a compacting action.
The running situation of backhaul action master cylinder oil circuit is：The effect for the crescent gear pump 1 that liquid drives in servomotor 2
Afterwards, by conveyance conduit by hydraulic fluid port c enter among closed three position four-way electromagnetic valve 11, electromagnet YA2 opens electric, liquid from
The middle closed hydraulic fluid port a of three position four-way electromagnetic valve 11 outflows are divided into two-way, and a-road-through crosses replenishing valve 5c and enters master cylinder 9a by A1 mouths,
Replenishing valve 5a is opened on another way top, and the liquid in master cylinder 9a is entered in fuel tank by replenishing valve 5a, and electromagnet YA8 opens to obtain electric control
The pressure of system, other electromagnet must not be turned off electricity, realize master cylinder 9a backhaul action.
Oil circuit take blame for others operationally, oil circuit of taking blame for others controls the ejection for the 9b that takes blame for others and retracts 2 actions.
The take blame for others running situation of oil circuit of ejection action is：The effect for the crescent gear pump 1 that liquid drives in servomotor 2
Afterwards, liquid enters intermediary press formula three position four-way electromagnetic valve 15 by hydraulic fluid port g, and electromagnet YA3 opens electric, and liquid is added by centre
Pressure type three position four-way electromagnetic valve 15 is flowed out by hydraulic fluid port f, and liquid flow crosses replenishing valve 5e, is finally entered by A2 mouths in the 9b that takes blame for others, liquid
Flowed out by B2 mouths, by the hydraulic fluid port e of intermediary press formula three position four-way electromagnetic valve 15 and the liquid joint from hydraulic fluid port g entrance, from hydraulic fluid port f
Circulation outflow, electromagnet YA8 open electric control system pressure, other electromagnet must not be turned off electricity, realize and take blame for others 9b's
Ejection acts.
Retracting the take blame for others running situation of oil circuit of action is：The effect for the crescent gear pump 1 that liquid drives in servomotor 2
Afterwards, liquid enters intermediary press formula three position four-way electromagnetic valve 15 by hydraulic fluid port g, and electromagnet YA4 opens electric, and liquid is by intermediary press
The hydraulic fluid port e of formula three position four-way electromagnetic valve 15 flows out, and enters the 9b that takes blame for others by B2 mouths, liquid is flowed out by A2 mouths, the fliud flushing valve opened by top
5e, the liquid joint entered by the hydraulic fluid port f of intermediary press formula three position four-way electromagnetic valve 15 and hydraulic fluid port g, circulate and flowed out from hydraulic fluid port e,
Electromagnet YA8 open electric control system pressure, other electromagnet must not be turned off electricity, realize the fallback action for the 9b that takes blame for others.
Claims (4)
- A kind of 1. hydraulic system of elastomeric material forging and stamping, it is characterised in that：Including crescent gear pump, servomotor, machine is performed Structure and inserted valve valve group；Servomotor drives inside engaged gear pump work by power transmission shaft, and inserted valve valve group is located at internal messing Between the leakage fluid dram of gear pump and the executing agency of hydraulic press；The executing agency includes master cylinder and taken blame for others, and master cylinder is connected in the oil circuit of inserted valve valve group with taking blame for others, master cylinder bag Oil scraper port A1, hydraulic fluid port B1, a replenishing valve a is connected with master cylinder, is taken blame for others including hydraulic fluid port A2, hydraulic fluid port B2；The inserted valve valve group includes master cylinder oil circuit and oil circuit of taking blame for others, and master cylinder oil circuit includes middle closed 3-position 4-way electromagnetism Valve, overflow valve, replenishing valve, two-position two-way solenoid valve, fuel tank and adjustable throttling, middle closed three position four-way electromagnetic valve include Hydraulic fluid port a, hydraulic fluid port b, hydraulic fluid port c and hydraulic fluid port d, hydraulic fluid port c are connected with the oil-out of crescent gear pump, and replenishing valve c and overflow valve c is simultaneously Connection, the oil circuit one end in parallel are connected on hydraulic fluid port a by oil pipe, and the other end is connected to the A1 oil ports of master cylinder, the B1 oil of master cylinder A replenishing valve b is in series with behind mouthful, replenishing valve b is connected on by oil pipe at the hydraulic fluid port b of middle closed three position four-way electromagnetic valve, An overflow valve d is parallel between the middle closed three position four-way electromagnetic valve oil circuit in parallel with replenishing valve c, overflow valve c, is overflow Connected between stream valve d and replenishing valve a, an oil circuit is parallel between overflow valve c, replenishing valve c parallel connections oil circuit and master cylinder A1 hydraulic fluid ports, its One end is connected between on the hydraulic fluid port c of closed three position four-way electromagnetic valve, and replenishing valve d and two-position four-way have been sequentially connected in series on oil circuit Magnetic valve a, one is connected with by adjustable throttling and two-position two-way solenoid valve string on the oil pipe between master cylinder B1 hydraulic fluid ports and replenishing valve b The oil circuit of connection；The oil circuit of taking blame for others includes intermediary press formula three position four-way electromagnetic valve, replenishing valve e and two-position four-way solenoid valve b, and centre adds Pressure type three position four-way electromagnetic valve includes hydraulic fluid port e, hydraulic fluid port f, hydraulic fluid port g and hydraulic fluid port h, the hydraulic fluid port of intermediary press formula three position four-way electromagnetic valve G is connected with the hydraulic fluid port d of intermediate seal formula three position four-way electromagnetic valve, and the hydraulic fluid port h of intermediary press formula three position four-way electromagnetic valve nibbles with interior Close gear pump be connected, the hydraulic fluid port e of intermediary press formula three position four-way electromagnetic valve is connected with the B2 hydraulic fluid ports taken blame for others, the A2 hydraulic fluid ports taken blame for others and One replenishing valve e is connected, and replenishing valve e is connected with the hydraulic fluid port f of intermediary press formula three position four-way electromagnetic valve, in intermediary press formula three four An overflow valve b is parallel with oil circuit between the hydraulic fluid port e of three-way electromagnetic valve and the B2 hydraulic fluid ports taken blame for others, in A2 hydraulic fluid ports and the replenishing valve of taking blame for others An overflow valve a is parallel between e, two-position four-way solenoid valve c is also being parallel between A2 hydraulic fluid ports and replenishing valve e taking blame for others, at this A non-adjustable restrictor is in series with two-position four-way solenoid valve c, two-position four-way solenoid valve b is in parallel with an overflow valve e, the parallel oil Road one end is connected in parallel between crescent gear pump and middle closed three position four-way electromagnetic valve hydraulic fluid port c, and the other end is connected in parallel on cooling Between device and middle closed three position four-way electromagnetic valve hydraulic fluid port d.
- 2. the hydraulic system of elastomeric material forging and stamping according to claim 1, it is characterised in that：Also include 4 pressure gauges, be connected in parallel on respectively at the oil-out of crescent gear pump, the B2 oil ports taken blame for others, the A2 to take blame for others Oil port, the B1 oil ports of master cylinder, pressure sensor have 2, is connected to the liquid outlet and master cylinder of crescent gear pump B1 oil ports.
- 3. the hydraulic system of elastomeric material forging and stamping according to claim 1, it is characterised in that：Cooler is arranged on the side of crescent gear pump.
- 4. the hydraulic system of elastomeric material forging and stamping according to claim 1, it is characterised in that：Overflow in the ejection pressure regulation taken blame for others A remote control overflow valve is in series with stream valve a.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610090593.4A CN105598334B (en) | 2016-02-18 | 2016-02-18 | A kind of hydraulic system of elastomeric material forging and stamping |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610090593.4A CN105598334B (en) | 2016-02-18 | 2016-02-18 | A kind of hydraulic system of elastomeric material forging and stamping |
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| Publication Number | Publication Date |
|---|---|
| CN105598334A CN105598334A (en) | 2016-05-25 |
| CN105598334B true CN105598334B (en) | 2017-12-01 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201610090593.4A Expired - Fee Related CN105598334B (en) | 2016-02-18 | 2016-02-18 | A kind of hydraulic system of elastomeric material forging and stamping |
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Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2017219337A1 (en) * | 2016-06-24 | 2017-12-28 | 邵正国 | Hydraulic system for hydraulic machine for forging and pressing elastic material |
| US11173644B2 (en) | 2017-09-26 | 2021-11-16 | Davis-Standard, Llc | Casting apparatus for manufacturing polymer film |
Family Cites Families (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN201144909Y (en) * | 2007-12-29 | 2008-11-05 | 江苏国力锻压机床有限公司 | Hydraulic control system of hydraulic machine |
| CN101704059B (en) * | 2009-09-30 | 2011-06-15 | 浙江大学 | Hydraulic system of horizontal buffer cylinder of forging and pressing operating machine |
| JP5471476B2 (en) * | 2010-01-14 | 2014-04-16 | トヨタ自動車株式会社 | Closure device and closure method |
| CN201632573U (en) * | 2010-04-01 | 2010-11-17 | 德谦杭重锻造有限公司 | Free forging hydraulic power system |
| JP2012106267A (en) * | 2010-11-18 | 2012-06-07 | Negami Kosakusho:Kk | Double control system |
| CN103042147B (en) * | 2012-12-31 | 2014-07-02 | 中国重型机械研究院股份公司 | Heavy forging and pressing device and high-speed hydraulic control method |
| CN203599448U (en) * | 2013-12-03 | 2014-05-21 | 太原重工股份有限公司 | Hot die forging press sliding block action hydraulic control system |
| CN105298945B (en) * | 2015-11-27 | 2018-02-27 | 南通锻压设备股份有限公司 | Quick pressing hydraulic machine hydraulic system |
| CN205763584U (en) * | 2016-02-18 | 2016-12-07 | 南通皋液液压机有限公司 | A kind of hydraulic system of the hydraulic press forging and pressing elastomeric material |
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| CB02 | Change of applicant information | ||
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Address after: Bai Pu town Rugao City, Jiangsu province 226500 Nantong Tongyang Road No. 111 Applicant after: Nantong gaoye heavy Limited by Share Ltd Address before: Bai Pu town Rugao City, Jiangsu province 226500 Nantong Tongyang Road No. 111 Applicant before: Nantong Gaoye Hydraulic Press Machine Co., Ltd. |
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| CF01 | Termination of patent right due to non-payment of annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20171201 Termination date: 20210218 |