CN110014064A - The fluid power system of high-accuracy punching press numerically-controlled machine tool - Google Patents
The fluid power system of high-accuracy punching press numerically-controlled machine tool Download PDFInfo
- Publication number
- CN110014064A CN110014064A CN201910300938.8A CN201910300938A CN110014064A CN 110014064 A CN110014064 A CN 110014064A CN 201910300938 A CN201910300938 A CN 201910300938A CN 110014064 A CN110014064 A CN 110014064A
- Authority
- CN
- China
- Prior art keywords
- valve
- punching press
- numerically
- power system
- fluid power
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
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Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21D—WORKING OR PROCESSING OF SHEET METAL OR METAL TUBES, RODS OR PROFILES WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21D22/00—Shaping without cutting, by stamping, spinning, or deep-drawing
- B21D22/02—Stamping using rigid devices or tools
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21D—WORKING OR PROCESSING OF SHEET METAL OR METAL TUBES, RODS OR PROFILES WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21D37/00—Tools as parts of machines covered by this subclass
- B21D37/10—Die sets; Pillar guides
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B30—PRESSES
- B30B—PRESSES IN GENERAL
- B30B1/00—Presses, using a press ram, characterised by the features of the drive therefor, pressure being transmitted directly, or through simple thrust or tension members only, to the press ram or platen
- B30B1/32—Presses, using a press ram, characterised by the features of the drive therefor, pressure being transmitted directly, or through simple thrust or tension members only, to the press ram or platen by plungers under fluid pressure
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B30—PRESSES
- B30B—PRESSES IN GENERAL
- B30B15/00—Details of, or accessories for, presses; Auxiliary measures in connection with pressing
- B30B15/02—Dies; Inserts therefor; Mounting thereof; Moulds
- B30B15/026—Mounting of dies, platens or press rams
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B30—PRESSES
- B30B—PRESSES IN GENERAL
- B30B15/00—Details of, or accessories for, presses; Auxiliary measures in connection with pressing
- B30B15/16—Control arrangements for fluid-driven presses
Abstract
A kind of fluid power system of high-accuracy punching press numerically-controlled machine tool, the high-accuracy punching press numerically-controlled machine tool includes machine body, lower lathe bed and upper bed, described leave the bed is equipped with workbench with it, lower punch assembly is connected on the workbench, punch assembly is connected with below the lower lathe bed, the fluid power system includes fuel tank, filter, drive valve group and pressure maintaining valve group, the driving valve group is connected to filter and fuel tank by driving gear pump and driving motor and supplies hydraulic oil to hydraulic-driven part, the pressure maintaining valve group is connected to filter and fuel tank by pressure maintaining gear pump and pressure maintaining motor and hydraulic oil is supplied supreme support hydraulic pressure part and lower support hydraulic pressure part；The configuration of the present invention is simple as a result, it is easy to operate, effective buffering when punching press can be provided, and adaptation function can be provided in punching press, adaptation is more extensive, and punching press acceptance rate is higher.
Description
Technical field
The present invention relates to the technical field of press machine more particularly to a kind of hydraulic-drivens of high-accuracy punching press numerically-controlled machine tool
System.
Background technique
Punching press is that depended on pressure machine and mold apply external force to plate, band, tubing and profile etc., is allowed to generate plastic deformation
Or separation, thus the forming and machining method of the workpiece (stamping parts) of shape and size needed for obtaining.Punching press and forging belong to plasticity
It processes (or pressure processing), is collectively referred to as forging and pressing.The blank of punching press is mainly the steel plate and steel band of hot rolling and cold rolling.Global steel
In material, 60~70% be plate, and finished product is made by punching press in wherein most.Vehicle body, chassis, fuel tank, the radiator of automobile
Piece, the drum of boiler, the shell of container, motor, iron core silicon-steel sheet of electric appliance etc. are all punch process.Instrument and meter, household
In the products such as electric appliance, bicycle, office machinery, household utensil, also there are a large amount of stamping parts.
Punch process is to make plate in mold directly by deformation force by means of the power of conventional or dedicated stamping equipment
And deformed, so that certain shapes is obtained, the production technology of the product parts of size and performance.Plate, mold and equipment are
The three elements of punch process.It is divided into drop stamping and cold stamping by punch process temperature.The former is suitble to resistance of deformation high, and plasticity is poor
Sheet Metal Processing；The latter then carries out at room temperature, is the common process for stamping of thin plate.It is that (or pressure adds for Metal Forming
Work) one of main method, be also under the jurisdiction of material molding engineering technology.
However, present stamping device often has certain defect in use: present stamping die is relatively fixed,
It cannot be adapted to according to the intensity and hardness of stamping parts, punching press is easy to cause to fail.
For this purpose, designer of the invention, in view of drawbacks described above, by concentrating on studies and designing, synthesis is engaged in for many years for a long time
The experience and achievement of related industry, researching and designing goes out a kind of fluid power system of high-accuracy punching press numerically-controlled machine tool, on overcoming
State defect.
Summary of the invention
The purpose of the present invention is to provide a kind of fluid power systems of high-accuracy punching press numerically-controlled machine tool, and structure is simple,
It is easy to operate, effective buffering when punching press can be provided, and adaptation function can be provided in punching press, adapt to more extensive, punching press
Acceptance rate is higher.
To solve the above problems, the invention discloses a kind of fluid power system of high-accuracy punching press numerically-controlled machine tool, the height
Precision stamping numerically-controlled machine tool includes machine body, lower lathe bed and upper bed, and described leave the bed is equipped with workbench, the workbench with it
On be connected with lower punch assembly, be connected with punch assembly below the lower lathe bed, the lower punch assembly includes to be fixed to
The lower cushion cap of workbench, the lower cushion cap be equipped with lower mold, be additionally provided with it is multiple positioned at lower mold and lower cushion cap between it is lower oneself
Component is adapted to, the lower adaptive component includes multiple spaced lower support hydraulic pressure parts, and the upper punch assembly includes solid
The fixed upper cushion cap to upper bed, the upper cushion cap are equipped with upper mold, and the upper cushion cap is equipped with the liquid that driving upper mold carries out punching press
Actuator is pressed, upper adaptive component is equipped between the hydraulic-driven part and upper mold, the upper adaptive component includes multiple
Upper support hydraulic pressure part, it is characterised in that:
The fluid power system includes that fuel tank, filter, driving valve group and pressure maintaining valve group, the driving valve group pass through drive
Movable tooth wheel pump and driving motor are connected to filter and fuel tank and supply hydraulic oil to hydraulic-driven part, and the pressure maintaining valve group is logical
It crosses pressure maintaining gear pump and pressure maintaining motor is connected to filter and fuel tank and hydraulic oil is supplied supreme support hydraulic pressure part and lower support
Hydraulic part.
Wherein: it is single that the driving valve group includes at least the solenoid directional control valve for being sequentially connected in series setting, the first check valve and first
To throttle valve, the front end of the solenoid directional control valve is connected to driving gear pump, and the end of first one-way throttle valve passes through pipe
Road is connected to the rodless cavity of hydraulic-driven part.
Wherein: being additionally provided with ball valve and the first overflow valve between first one-way throttle valve and hydraulic-driven part.
Wherein: being additionally provided with accumulator between the solenoid directional control valve and driving gear pump.
Wherein: the pressure maintaining valve group includes that electromagnetism supports valve, and the front end of the electromagnetism support valve passes through throttle valve and second
Overflow valve is connected to pressure maintaining gear pump, and rear end is connected to the upper support liquid for needing pressure maintaining by multiple second one-way throttle valves respectively
Casting die and lower support hydraulic pressure part.
Wherein: the electromagnetism support valve is parallel with a second one-way valve.
Wherein: the electromagnetism support valve is additionally provided with manual lever.
Wherein: the output end of the pressure maintaining gear pump is additionally provided with pressure detector to provide real-time monitoring and control.
By above structure it is found that the configuration of the present invention is simple, flexible operation can be provided adaptive by fluid power system
Buffering effect, bolster passes through adaptive component and is supported, hydraulic regulation easy to accomplish, provides preferably buffering effect
Fruit can be realized real-time accordingly to the progress such as the intensity of different stamping parts and material by the hydraulic self-adapting function of control system
Adjustment provides better punching press basis for the efficient stable of stamping die.
Detailed content of the invention can be obtained by aftermentioned explanation and institute's attached drawing.
Detailed description of the invention
Fig. 1 shows the structural schematic diagram of high-accuracy punching press numerically-controlled machine tool of the invention.
Fig. 2 shows the concrete structure schematic diagram of punch assembly of the present invention.
Fig. 3 shows the schematic diagram of the fluid power system of high-accuracy punching press numerically-controlled machine tool of the invention.
Appended drawing reference:
1, machine body；2, lower lathe bed；3, workbench；4, lower punch assembly；5, upper bed；6, upper punch assembly；7, even
Connect column；11, lower cushion cap；12, lower mold；13, lower support element；14, lower bolster；15, upper cushion cap；16, upper mold；17, hydraulic
Actuator；18, upper junction plate；19, lower connecting plate；20, middle connecting column；21, outer connecting column；22, upper supporting piece；23, upper buffering
Part；101, fuel tank；102, filter；103, gear pump is driven；104, driving motor；105, accumulator；106, solenoid directional control valve；
107, the first check valve；108, the first one-way throttle valve；109, the first overflow valve；110, pressure maintaining gear pump；111, pressure maintaining motor；
112, pressure detector；113, the second overflow valve；114, electromagnetism supports valve；115, throttle valve；116, second one-way valve；117, hand
Dynamic operating stick；118, the second one-way throttle valve.
Specific embodiment
Referring to Fig. 1 and 2, it is shown that apply high-accuracy punching press numerically-controlled machine tool of the invention.
The high-accuracy punching press numerically-controlled machine tool includes machine body 1, lower lathe bed 2 and upper bed 5, in the machine body 1
Equipped with electric component, fluid power system, digital control system etc., the lower lathe bed 2 is equipped with workbench 3, connects on the workbench 3
It is connected to lower punch assembly 4, the lower section of the lower lathe bed 5 is connected with punch assembly 6, to realize by those structures to work
Make the workpiece on platform 3 and realize digital stamping operation, wherein can also be equipped with multiple connecting columns between the upper bed 5 and lower lathe bed 2
7, the multiple connecting column 7 can around around upper punch assembly 6 and lower punch assembly 4, provide in punching press upper bed 5 and under
It is relatively stable between lathe bed 2, wherein the multiple connecting column 7 can be fixed to lower lathe bed for buffering connecting column, lower end, on
End is fixed to upper bed 5 by flexible connectors such as buffer springs, to provide the integrated buffer and stabilization function in punching press.
Wherein, in order to realize that adaptive and pooling feature, punch assembly up and down of the invention have carried out special setting, with
It realizes to the adaptive of workpiece, and the buffering in punching course is provided.
Referring to fig. 2, it is shown that the present invention in punch assembly concrete structure schematic diagram, punch assembly of the invention mainly by
Upper punch assembly 6 and lower punch assembly 4 composition, the lower punch assembly includes the lower cushion cap 11 for being fixed to workbench 3, under described
Cushion cap 11 can be fixed to workbench 3 by multiple fixing bolts of periphery, specifically, the workbench 3 is also affixed to down
Lathe bed 2, the lower cushion cap 11 are equipped with lower mold 12, the lower appearance that the upper surface setting of the lower cushion cap 11 is placed in for lower mold 12
Groove is set, under being set to that the lower mold 12 floats in containing groove, and is equipped under multiple be located in the lower containing groove
The lower bolster 14 of 12 lower section of mold, to provide effective pooling feature, mold 12 is to lower containing groove under avoiding in punching press
Rigid shock is generated, in a preferred embodiment, the lower bolster 14 can be rubber bumper, wherein to realize lower mold
12 is adaptive in lower containing groove, is additionally provided with multiple lower adaptive components between lower mold 12 and lower cushion cap 11,
Wherein in the embodiment shown in FIG., the lower adaptive component include multiple spaced lower support elements 13, it is described it is each under
Supporting element 13 is fixed in lower cushion cap 11 and upper end is connected to the lower surface of lower mold 12, wherein preferably adaptive to provide
Function, each lower support element 13 can be lower support hydraulic pressure part, and each lower support hydraulic pressure part is connected to the hydraulic-driven system in machine body 1
System and digital control system, the digital control system control fluid power system provide corresponding hydraulic pressure support pressure for each lower support hydraulic pressure part
Power.
The upper punch assembly 6 includes the upper cushion cap 15 for being fixed to upper bed 5, and the upper cushion cap 15 can pass through the more of periphery
A fixing bolt is fixed to upper bed 5, and the upper cushion cap 15 is equipped with upper mold 16, is arranged on the upper cushion cap 15 for upper mold 16
The upper containing groove of merging, and equipped with multiple upper bolsters 23 positioned at 16 top of upper mold in the upper containing groove, thus
Effective pooling feature is provided, avoids upper mold 16 in punching press from generating rigid shock to upper containing groove, the upper cushion cap 15 is set
There is driving upper mold 16 to carry out the hydraulic-driven part 17 of punching press, the hydraulic-driven part 17 is connected to fluid power system and numerical control
System is equipped with upper adaptive component to provide required stamping press and stroke between the hydraulic-driven part 17 and upper mold 16,
To provide adaptation function, in the embodiment shown in FIG., the upper adaptive component includes multiple spaced upper supports
The lower end of part 22, each upper supporting piece 22 is connected to the upper surface of upper mold 16, wherein to provide better adaptive function
Can, each upper supporting piece 22 can be upper support hydraulic pressure part, and each upper support hydraulic pressure part is connected to the fluid power system in machine body 1
And digital control system, the digital control system control fluid power system provide corresponding hydraulic pressure support pressure for each upper support hydraulic pressure part
Power.
Wherein, the upper adaptive component also may include upper junction plate 18 and lower connecting plate 19,18 He of upper junction plate
By the connection of middle connecting column 20 and periphery is attached by more outer connecting columns 21 between the middle part of lower connecting plate 19, it is described on
Connecting plate 18 is connected to hydraulic-driven part 17, and the lower connecting plate 19 is connected to upper supporting piece 22, thus in hydraulic-driven part 17
It is formed and is stably connected between upper supporting piece 22, and the middle connecting column 20 is that buffering hydraulic connects with multiple outer connecting columns 21
Column, and the fluid power system and digital control system being connected in machine body 1, the digital control system control fluid power system are
Each upper connecting column provides corresponding hydraulic pressure support pressure.
Wherein, the hydraulic of upper supporting piece 22 and lower support element 13, while digital control system are supplied to by fluid power system
The oil pump controlled in fluid power system supplies corresponding pressure, can adjust the branch bulging of upper supporting piece 22 and lower support element 13 in real time
Power, it is real so as to provide different support pressure when the workpiece to unlike material, different hardness, varying strength carries out punching press
Existing adaptation function, meanwhile, real-time pressure adjustment function is also provided.
Referring to Fig. 3, it is shown that the fluid power system of high-accuracy punching press numerically-controlled machine tool of the invention, it includes fuel tank 101,
Filter 102, driving valve group and pressure maintaining valve group, the driving valve group are connected to by driving gear pump 103 and driving motor 104
Filter 102 and fuel tank 101, and hydraulic oil is supplied to hydraulic-driven part 17, the pressure maintaining valve group passes through pressure maintaining gear pump 110
It is connected to filter 102 and fuel tank 101 with pressure maintaining motor 111, and hydraulic oil is supplied into supreme support hydraulic pressure part and lower support liquid
Casting die.
Wherein, the driving valve group includes at least solenoid directional control valve 106,107 and of the first check valve for being sequentially connected in series setting
First one-way throttle valve 108, the front end of the solenoid directional control valve 106 are connected to driving gear pump 103, first one-way throttle
The end of valve 108 passes through the rodless cavity of piping connection to hydraulic-driven part 17, first one-way throttle valve 108 and hydraulic-driven
It is additionally provided with ball valve and the first overflow valve 109 between part 17, and is also set between the solenoid directional control valve 106 and driving gear pump 103
There is accumulator 105.
Wherein, the pressure maintaining valve group includes that electromagnetism supports valve 114, and the front end of the electromagnetism support valve 114 passes through throttle valve
115 and second overflow valve 113 be connected to pressure maintaining gear pump 110, rear end passes through multiple second one-way throttle valves 118 respectively and is connected to
Need the upper support hydraulic pressure part and lower support hydraulic pressure part of pressure maintaining.
Wherein, the electromagnetism support valve 114 is parallel with a second one-way valve 116, to provide safety assurance, the electromagnetism branch
Support valve 114 is additionally provided with manual lever 117, to provide the artificial cut-off operation when state of emergency.
Wherein, the output end of the pressure maintaining gear pump 110 is additionally provided with pressure detector 112, to carry out to the pressure of pressure maintaining
Detection and signal return, to provide real-time monitoring and control.
It is readily apparent that above description and record is only illustrated in the disclosure being not intended to be limiting of the invention
Appearance, application or use.Although describing and being described in the accompanying drawings embodiment in embodiment, the present invention is not limited
Be described as by attached drawing example and in embodiment it is now recognized that optimal mode to implement the particular case of the teachings of the present invention
Son, the scope of the present invention will include any embodiment for falling into the description and appended claims of front.
Claims (8)
1. a kind of fluid power system of high-accuracy punching press numerically-controlled machine tool, the high-accuracy punching press numerically-controlled machine tool include machine body,
Lower lathe bed and upper bed, described leave the bed are equipped with workbench with it, are connected with lower punch assembly, the lower lathe bed on the workbench
Lower section be connected with punch assembly, the lower punch assembly includes the lower cushion cap for being fixed to workbench, is set in the lower cushion cap
There is lower mold, be additionally provided with multiple lower adaptive components between lower mold and lower cushion cap, the lower adaptive component includes
Multiple spaced lower support hydraulic pressure parts, the upper punch assembly include the upper cushion cap for being fixed to upper bed, the upper cushion cap
Equipped with upper mold, the upper cushion cap is equipped with the hydraulic-driven part that driving upper mold carries out punching press, the hydraulic-driven part and upper mold
Upper adaptive component is equipped between tool, the upper adaptive component includes multiple upper support hydraulic pressure parts, it is characterised in that:
The fluid power system includes that fuel tank, filter, driving valve group and pressure maintaining valve group, the driving valve group pass through sliding tooth
Wheel pump and driving motor are connected to filter and fuel tank and supply hydraulic oil to hydraulic-driven part, and the pressure maintaining valve group passes through guarantor
Knob wheel pump and pressure maintaining motor are connected to filter and fuel tank and hydraulic oil are supplied supreme support hydraulic pressure part and lower support hydraulic pressure
Part.
2. the fluid power system of high-accuracy punching press numerically-controlled machine tool as described in claim 1, it is characterised in that: the driving valve
Group includes at least the solenoid directional control valve, the first check valve and the first one-way throttle valve for being sequentially connected in series setting, the solenoid directional control valve
Front end be connected to driving gear pump, the end of first one-way throttle valve is by piping connection to hydraulic-driven part without bar
Chamber.
3. the fluid power system of high-accuracy punching press numerically-controlled machine tool as claimed in claim 2, it is characterised in that: described first is single
To being additionally provided with ball valve and the first overflow valve between throttle valve and hydraulic-driven part.
4. the fluid power system of high-accuracy punching press numerically-controlled machine tool as claimed in claim 2, it is characterised in that: the electromagnetism changes
Accumulator is additionally provided between valve and driving gear pump.
5. the fluid power system of high-accuracy punching press numerically-controlled machine tool as described in claim 1, it is characterised in that: the pressure retaining valve
Group supports valve comprising electromagnetism, and the front end of the electromagnetism support valve is connected to pressure maintaining gear pump by throttle valve and the second overflow valve,
Rear end is connected to the upper support hydraulic pressure part and lower support hydraulic pressure part for needing pressure maintaining by multiple second one-way throttle valves respectively.
6. the fluid power system of high-accuracy punching press numerically-controlled machine tool as claimed in claim 5, it is characterised in that: the electromagnetism branch
Support valve is parallel with a second one-way valve.
7. the fluid power system of high-accuracy punching press numerically-controlled machine tool as claimed in claim 5, it is characterised in that: the electromagnetism branch
Support valve is additionally provided with manual lever.
8. the fluid power system of high-accuracy punching press numerically-controlled machine tool as claimed in claim 5, it is characterised in that: the pressure maintaining tooth
The output end of wheel pump is additionally provided with pressure detector to provide real-time monitoring and control.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910300938.8A CN110014064B (en) | 2019-04-15 | 2019-04-15 | Hydraulic driving system of high-precision stamping numerical control machine tool |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910300938.8A CN110014064B (en) | 2019-04-15 | 2019-04-15 | Hydraulic driving system of high-precision stamping numerical control machine tool |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN110014064A true CN110014064A (en) | 2019-07-16 |
| CN110014064B CN110014064B (en) | 2021-09-03 |
Family
ID=67191365
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201910300938.8A Active CN110014064B (en) | 2019-04-15 | 2019-04-15 | Hydraulic driving system of high-precision stamping numerical control machine tool |
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Citations (7)
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|---|---|---|---|---|
| JPH10323722A (en) * | 1997-03-26 | 1998-12-08 | Amada Co Ltd | Fabrication of punch press and device therefor |
| CN200988312Y (en) * | 2006-11-10 | 2007-12-12 | 佛山市顺德区荣兴锻压设备有限公司 | Real time controlled hydraulic press |
| CN201026671Y (en) * | 2007-01-25 | 2008-02-27 | 重庆工学院 | Economic fine blanking hydraulic press |
| CN101175585A (en) * | 2005-05-16 | 2008-05-07 | 会田工程技术有限公司 | Die cushion device for press machine |
| CN101224635A (en) * | 2007-01-19 | 2008-07-23 | 北京机电研究所 | Flashing precise planning and cutting hydropress |
| CN105538571A (en) * | 2016-01-21 | 2016-05-04 | 合肥良骏汽车材料有限公司 | Automotive interior trim forming hydraulic machine |
| CN106739122B (en) * | 2016-11-22 | 2018-10-23 | 宣城托新精密科技有限公司 | The electrichydraulic control press of mechanical signal commutation |
-
2019
- 2019-04-15 CN CN201910300938.8A patent/CN110014064B/en active Active
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|---|---|---|---|---|
| JPH10323722A (en) * | 1997-03-26 | 1998-12-08 | Amada Co Ltd | Fabrication of punch press and device therefor |
| CN101175585A (en) * | 2005-05-16 | 2008-05-07 | 会田工程技术有限公司 | Die cushion device for press machine |
| CN200988312Y (en) * | 2006-11-10 | 2007-12-12 | 佛山市顺德区荣兴锻压设备有限公司 | Real time controlled hydraulic press |
| CN101224635A (en) * | 2007-01-19 | 2008-07-23 | 北京机电研究所 | Flashing precise planning and cutting hydropress |
| CN201026671Y (en) * | 2007-01-25 | 2008-02-27 | 重庆工学院 | Economic fine blanking hydraulic press |
| CN105538571A (en) * | 2016-01-21 | 2016-05-04 | 合肥良骏汽车材料有限公司 | Automotive interior trim forming hydraulic machine |
| CN106739122B (en) * | 2016-11-22 | 2018-10-23 | 宣城托新精密科技有限公司 | The electrichydraulic control press of mechanical signal commutation |
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Effective date of registration: 20210730 Address after: 541000 plot d-03, information industry park, Guilin National High tech Zone, Chaoyang Road, Qixing District, Guilin City, Guangxi Zhuang Autonomous Region Applicant after: Guilin Hongbo Machine Tool Co.,Ltd. Address before: 400000 2-2-1-61 319 Haier Road, Jiangbei District, Chongqing. Applicant before: Chongqing Steady Technology Co.,Ltd. |
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