CN202377448U - Multifunctional horizontal ring rolling machine - Google Patents
Multifunctional horizontal ring rolling machine Download PDFInfo
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- CN202377448U CN202377448U CN201220028841XU CN201220028841U CN202377448U CN 202377448 U CN202377448 U CN 202377448U CN 201220028841X U CN201220028841X U CN 201220028841XU CN 201220028841 U CN201220028841 U CN 201220028841U CN 202377448 U CN202377448 U CN 202377448U
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- rolling machine
- horizontal ring
- ring rolling
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Abstract
The utility model relates to a multifunctional horizontal ring rolling machine which maintains main structures of a common horizontal ring rolling machine, such as a machine body, a main rolling wheel, a core roller, a guide roller, a centering mechanism, a core roller supporting rack, a detection mechanism, an axial rolling mechanism and the like; two auxiliary rolling wheels are symmetrically distributed at the two sides of the movement central line of the core roller and the opposite side of the guide roller, the rolling wheels are pushed by an oil cylinder through a lever or directly towed by the oil cylinder to feed and apply pressure in the radial direction of a workpiece at a certain trace, and equipment can be simply and quickly adjusted. According to the multifunctional horizontal ring rolling machine, besides all the functions of the common horizontal ring rolling machine, the machine is also suitable for producing large rings with different rolling widths and complex shapes, so that the application range of the common horizontal ring rolling machine is expanded; and the newly-increased parts have simple structures, low manufacture costs, reliable performances and long service lives. The machine disclosed by the utility model is used for creation as well as transformation of the existing horizontal ring rolling machine.
Description
One, technical field:
The utility model multipurpose horizontal Ring Rolling Machine relates to a kind of large-scale swaging equipment; Be the development of common horizontal Ring Rolling Machine, can be used for roll over expanding the common large ring bigger, can be used to roll over the shaping of expanding again than very little and complex-shaped large ring than (roll over the back workpiece diameter and roll over before the ratio of workpiece diameter).Belong to mechanical design field.
Two, background technology:
Ring Rolling Machine (staving press) is the permanent swaging equipment of a kind of history; Classify according to ring rolling device structure characteristics; Can be divided into two types of vertical Ring Rolling Machine and horizontal Ring Rolling Machines, the former is applicable to medium and small ring, and the latter is applicable to the manufacturing of large-scale and super-huge ring.Their appearance fork-like farm tools used in ancient China decades; Be widely used in the Plastic Forming of rings such as bearing inner and outer ring, wheel rim, railway rim, steam turbine, aircraft engine, space equipment, vertical Ring Rolling Machine is the main roll milling wheel by the motor driven rotation, and the core roller that in descending process of exerting pressure, changes with passive belt forms a pair roller; Circulation to the ring blank that is enclosed within on the core roller goes round and begins again is rolling; External diameter expansion in the ring, wall thickness reduction and progressively be shaped, it is applicable to the better simply ring of section, to complex-shaped and roll over and expand that (especially profile has the ring of dark groove than circlet spare again; Like connector of bilateral flange, duplicate gear and bilateral thrust wheel, all kinds of ball valves etc.) common vertical Ring Rolling Machine is powerless; Multifunctional ring rolling machine (patent No.: ZL200820057348.4 and ZL200810203822.4) is exactly should this demand and occur, and it continues to exert pressure after the ring internal diameter expands periphery and three roll milling wheels to and all touches; Three roll milling wheels are when restriction ring internal diameter enlarges; Metal to ring periphery top layer is rotated backward extrusion, makes it be full of mold cavity, can make to roll over the ring shaping of expanding than very little and complex contour.Be the conveniently assemble and disassemble workpiece, the lever that the secondary roll milling wheel of both sides needs to promote by oil cylinder gets into or leaves the operating position around the fulcrum rotation.Though multi-functional rivet bucker is successfully used to produce the special ring of this type; Enlarged the function of common vertical Ring Rolling Machine, the ring that common vertical Ring Rolling Machine can't be accomplished is shaped, but is not applied to as yet on the horizontal Ring Rolling Machine that main roll milling wheel original place rotates, core roller radial feed is exerted pressure; In the manufacturing of the ring of large and medium-sized compound section, do not make a breakthrough as yet at present; Can only be configured as the ring of simple section, the means with metal cutting further are shaped again, have expended a large amount of metals and machined expense.
Three, utility model content:
The utility model multipurpose horizontal Ring Rolling Machine purpose provides a kind of novel horizontal Ring Rolling Machine; It is except that the repertoire that possesses common horizontal Ring Rolling Machine; Can also implement the rotation backward extrusion to ring, be suitable for big, different spreading ratio of ring size range and complex-shaped large and medium-sized ring.
The multipurpose horizontal Ring Rolling Machine has kept lathe bed, main roll milling wheel 2, core roller 5, guide roller (embracing roller) 7 and centering machine, core roller bearing support (not expression in the accompanying drawing), testing agency 16 and the axially rolled mechanism primary structures such as (not expressions in the accompanying drawing) of common horizontal Ring Rolling Machine; Place on the work top of ring 6, the both sides of core roller 5 centre of motion lines, the offside of guide roller 7; Set up two secondary roll milling wheels 15 of symmetric arrangement, they are promoted or are directly promoted by oil cylinder 24 by lever 14 by oil cylinder 18.When adopting the lever mode; Respectively laying a secondary roll milling wheel 15 that structure is identical on two symmetrically arranged levers 14; One end of lever 14 links to each other with lever hinge 10 on being fixed on lathe bed; The other end links to each other with the piston rod that can implement the earrings formula oil cylinder 18 that radial feed exerts pressure; The earrings of the cylinder body afterbody of oil cylinder 18 then with lathe bed on hinge 19 link to each other; Oil cylinder 18 promotes lever 14 and all rotates around lever hinge 10 with secondary roll milling wheel 15 mounted thereto, gets into or leave the operating position with the track of big camber line and with stressed than angle with rational, and the feeding final position of secondary roll milling wheel 15 is set or adjusted with adjustment screw rod 13 by the nut 12 that is fixed on the lathe bed of projection on the lever 14 11 and one of which side.
An outlet controlling the three position four-way directional control valve 21 of oil cylinder 18 motions communicates with the big chamber of oil cylinder 18 through hydraulic control one-way valve 20, and another outlet is led to the loculus of oil cylinder 18 and linked to each other with the control mouth of hydraulic control one-way valve 20.Control reversal valve 21, the pressure oil forward backs down the big chamber that hydraulic control one-way valve 20 gets into oil cylinder 18, and piston rod promotes secondary roll milling wheel 15 radial feeds and exerts pressure; Till when the projection 11 of lever contacts adjustment screw rod 13; After reversal valve 21 switching-overs, pressure oil leads to the loculus of oil cylinder 18 and the control mouth of hydraulic control one-way valve 20, and reverse opening hydraulic control one-way valve 20 refluxes the oil in the big chamber of oil cylinder; The piston rod of oil cylinder 18 drives secondary roll milling wheel 15 and retreats, until the oil cylinder final position.When reversal valve was in meta, 18 of oil cylinders were locked it.
Multipurpose horizontal Ring Rolling Machine working mechanism is following:
When (1) being used as common horizontal Ring Rolling Machine, two secondary roll milling wheels are retreated to off-position (or remove two secondary roll milling wheel mechanisms), by the procedure operation of common horizontal Ring Rolling Machine; After ring base 6 is enclosed within on the core roller 5; Fall core roller bearing support, core roller oil cylinder 17 promotes core roller 5, and the main roll milling wheel 2 that ring base 6 and original place are rotated contacts; And changeed by the frictional force band; Two guide rollers 7 also contact with the periphery of ring 6, stable to roll over the ring process, to prevent to beat, axially Roller compaction device near ring and with the upper and lower contacts side surfaces of ring 6.Roll over the ring process and begin, when testing agency's contact 16 is run in the external diameter expansion of ring 6, the 5 stop feedings of core roller, and in fallback procedures, unclamp bearing support, guide roller withdraws from axial calendering roller, takes off ring 6, rolles over the completion of ring operation.
(2) when the large ring of processing reaming than smaller and complex-shaped (dark groove is particularly arranged), common horizontal Ring Rolling Machine is powerless to this, and at this moment, the multipurpose horizontal Ring Rolling Machine can be shaped because of its function that has had both the rotation backward extrusion easily.Its course of work is following: with two side cylinders 18 left and right two secondary roll milling wheels 15 are delivered to the operating position of forged piece size, the adjustment screw rod 13 of adjustment both sides makes it contact respectively with the plush copper 11 of both sides lever 14 and locatees.Control two reversal valves 21 during operation earlier, with two secondary roll milling wheels 15 retreat leave the operating position after, red-hot ring base 6 is inserted in core roller 5; Relend and help oil cylinder 18 to promote levers 14 two secondary roll milling wheel 15 low-pressure states to be abutted in play on the periphery of ring base centering effect (former centering machine can), after this promote core rollers 5 and drive ring base 6 with core roller oil cylinder 17 again, rely on the main roll milling wheel 2 of original place rotation; Be with change base 6 and core roller 5, and ring base 6 is exerted pressure, the distortion of ring base 6 has two stages; Phase I is common reaming process (this process can form more shallow further groove), and after ring 6 internal diameters expanded forging requirement size to, core roller 5 became the low pressure feeding; Abut in ring 6 bore areas and do not exert pressure, the secondary roll milling wheel 15 that both sides recline changes radial feed into exerts pressure, and rolles over the ring process and gets into second stage; This moment, three places of ring 6 periphery further groove contacted with three roll milling wheels (2 and 15) respectively, and along with the radial feed of secondary roll milling wheel 15, they have constituted the rotation backward extrusion; Extrude darker further groove and form the flange of both sides, thicker when ring 6 wall thickness, when radial rigidity is big, ring 6 can keep the garden degree; Because of the rotation backward extrusion only occurs on the ring outer surface, the endoporus of this stage ring 6 does not have significant change, is full of until mold cavity; Ring outer surface center dant is shaped; Till external diameter met the requirements, rotation backward extrusion process was accomplished, and two secondary roll milling wheels this moment (15) are in the feeding final position.Then, operate two secondary roll milling wheels, core roller, guide roller and axial calendering rollers and all retreat, unclamp core roller bearing support, unload the ring that is shaped the sixth of the twelve Earthly Branches and get final product.As long as the mould design is correct, blocking spare size and dimension is reasonable, just can be shaped smoothly, during the mould design draw taper should be arranged.In the second stage of rolling over ring, this moment two side cylinders 18 thrust should with the thrust of core roller oil cylinder 17 quite or bigger, could guarantee to rotate the completion of backward extrusion process.If endoporus also is darker non-garden cylindricality; Then core roller 5 should be made respective shapes; This moment, core roller 5 changes radial feed again into exerted pressure, and makes the darker non-garden cylindricality backward extrusion of endoporus in the phase III of distortion under three roll milling wheels (2 and 15) location and restriction ring external diameter condition of enlarged.
Multifunctional vertical Ring Rolling Machine forming process and multipurpose horizontal Ring Rolling Machine are inequality; The former is motionless because of main spreading crop rotation radial feed core roller; Carry out the reaming process earlier, to the ring periphery with get into sizing position and fixed secondary roll milling wheel and contact after, get into again and rotate the backward extrusion stage; Accomplish until deformation, two stages are all exerted pressure by the feeding of main roll milling wheel and realize.And the main roll milling wheel 2 of multipurpose horizontal Ring Rolling Machine rotation is not do the feeding motion of exerting pressure; The reaming process of ring and the non-garden of endoporus post shapes are to be exerted pressure by the radial feed of core roller 5 to realize, the outside concave shape of ring then is to be exerted pressure by the radial feed of secondary roll milling wheel 15 to accomplish.
The advantage of the utility model:
(1) the multipurpose horizontal Ring Rolling Machine has enlarged the scope of application of common horizontal Ring Rolling Machine, and the ring of compound section is shaped, and has realized a tractor serves several purposes.
(2) ring of compound section can heat processing and forming, and forge weight is greatly alleviated, and has saved material; And reduced the machined expense; Thereby significantly reduced part manufacturing cost, the metallic fiber flow direction because of part has profiling property in addition, and has improved the mechanical performance of part.
(3) newly-increased parts be for can adorn removable individual components, and it is simple in structure, reliable in action, low cost of manufacture.
Four, description of drawings:
Fig. 1, multipurpose horizontal Ring Rolling Machine structural representation (oil cylinder lever).
Fig. 2, multipurpose horizontal Ring Rolling Machine structural representation (oil cylinder Direct Action Type).
Fig. 3, multipurpose horizontal Ring Rolling Machine structural representation (secondary roll milling wheel double as guiding roll-type).
The various ring section configurations that Fig. 4, multipurpose horizontal Ring Rolling Machine can be shaped.
A is an ordinary rectangular section ring; B, c, d are all kinds of compound section rings; E, f are cut to two flange-type ring again after being shaped.
Five, the specific embodiment: the embodiment that further specifies the utility model below in conjunction with accompanying drawing:
The multipurpose horizontal Ring Rolling Machine has kept lathe bed, main roll milling wheel 2, core roller 5, guide roller (embracing roller) 7 and centering machine, core roller bearing support (not expression in the accompanying drawing), testing agency 16 and the axially rolled mechanism primary structures such as (not expressions in the accompanying drawing) of common horizontal Ring Rolling Machine; (each one control respectively in two guide wheels shared one or both sides) 1 of centering machine oil cylinder by lever 3 around fulcrum 4 drive two guide rollers 7 near or leave the outer surface of ring 6; Core roller oil cylinder 17 promotes slide block 8 and core roller 5; Implementing radial feed along guide rail 9 moves; In the both sides of core roller 5 centre of motion lines, the offside of guide roller 7; Two secondary roll milling wheels 15 of symmetric arrangement, they are promoted or are directly promoted by oil cylinder 24 by lever 14 by oil cylinder 18.
(1) adopt oil cylinder lever scheme as shown in Figure 1; Respectively laying a secondary roll milling wheel 15 that structure is identical on the prong of two symmetrically arranged levers 14; One end of lever 14 links to each other with lever hinge 10 on being fixed on lathe bed; The other end links to each other with the piston rod of the earrings formula oil cylinder 18 that can implement radially to exert pressure; The earrings of the cylinder body afterbody of oil cylinder 18 then with lathe bed on hinge 19 link to each other; Oil cylinder 18 promotes lever 14 and all rotates around lever hinge 10 with secondary roll milling wheel 15 mounted thereto, gets into or leave the operating position with the track of big camber line and with stressed than angle with rational, and the feeding final position of secondary roll milling wheel 15 is set or adjusted with adjustment screw rod 13 by the nut 12 that is fixed on the lathe bed of projection on the lever 14 11 and one of which side.
(2) it is as shown in Figure 2 to adopt oil cylinder directly to promote scheme; The secondary roll milling wheel 15 of two symmetric arrangement is installed in respectively on the cylinder body extension of the portable oil cylinder of cylinder body (being that piston is motionless) 24; When oil cylinder 24 big chamber oil-feeds, cylinder body moves along guide rail 25 together with the secondary roll milling wheel 15 on it, together near ring 6; Then leave ring 6 during the loculus oil-feed, the feeding final position of secondary roll milling wheel 15 is set and adjustment by block 23, nut 12 and adjustment screw 13 fork-like farm tools used in ancient China.
(3) scheme of secondary roll milling wheel double as directive wheel as shown in Figure 3; It is the offside that guide roller and centering machine is arranged into main roll milling wheel 2; And oil cylinder 27 (each one control respectively of two secondary roll milling wheels shared one or a side), connecting rod 28 and lever 14 all strengthened; Make it can apply enough radial loads, and make strong secondary roll milling wheel mechanism's double as guide roller and play the centering effect.When rolling over the ring beginning, oil cylinder 27 is under the control of Hydrawlic Slave System 26, and two secondary roll milling wheels 15 are by connecting rod 28 and lever 14 (rotating around hinge 10); On the periphery that is attached to ring base 6, phase I that core roller 5 radial feeds are exerted pressure along with ring 6 external diameters enlarge, oil cylinder 27 is retreated under follower 26 controls; Make two secondary roll milling wheels 15 steadily embrace ring 6 and move back, play a part centering and guiding, when the ring internal diameter expands to when requiring size while changeing; Core roller 5 transfers on the endoporus that low pressure abuts in ring 6, and hydraulic control system 26 makes the big chamber high pressure oil-feed of oil cylinder 27, and two secondary roll milling wheels 15 transfer radial feed to and exert pressure; They and main roll milling wheel 2 form 3 rotation backward extrusion; Make this top layer metal be rotated backward extrusion and flow to the die cavity of mould and progressively shaping, when flange outside diameter contacts testing agency 16, roll over the round trip preface and accomplish; Withdraw from core roller and secondary roll milling wheel etc., hang away ring.
Multipurpose horizontal Ring Rolling Machine of the present invention is applicable to all kinds of rings of different spreading ratios, and particularly the complicated large special ring of section configuration is as shown in Figure 4.This technology has not only reduced raw-material consume (reaching more than 20%) significantly, has saved the machined expense, but also is the mechanical performance that profiling property has improved part because of forging fibre flow.But this machine a tractor serves several purposes and ring size range change greatly, thereby have enlarged the scope of application of Ring Rolling Machine, have improved the operating efficiency of Ring Rolling Machine.The newly-increased modular construction of multipurpose horizontal Ring Rolling Machine is simple, low cost of manufacture, dependable performance life-span are long.This new architecture not only can be used for newly making; Thereby become a kind of new architecture of the horizontal Ring Rolling Machine of current widely used all size, model; And can carry out add-assembly to existing horizontal Ring Rolling Machine easily, make its upgrading be updated to the multipurpose horizontal Ring Rolling Machine.
Claims (2)
1. multipurpose horizontal Ring Rolling Machine; Primary structures such as the lathe bed of common horizontal Ring Rolling Machine, main roll milling wheel, core roller, guide roller and centering machine, core roller bearing support, testing agency and axially rolled mechanism have been kept; It is characterized in that: on the work top of placing ring (6), the both sides of core roller (5) centre of motion line, the offside of guide roller (7); Set up two secondary roll milling wheels (15) of symmetric arrangement, they are promoted or are directly promoted by oil cylinder (24) by lever (14) by oil cylinder (18).
2. by the described multipurpose horizontal Ring Rolling Machine of claim 1; It is characterized in that: the scheme that adopts secondary roll milling wheel double as guide roller; Guide roller and centering machine are arranged into the offside of main roll milling wheel (2); And oil cylinder (27), connecting rod (28) and lever (14) all strengthened, make it can apply enough radial loads, and make strong secondary roll milling wheel mechanism's double as guide roller and play the centering effect.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201220028841XU CN202377448U (en) | 2011-11-21 | 2012-01-06 | Multifunctional horizontal ring rolling machine |
Applications Claiming Priority (3)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201120464992 | 2011-11-21 | ||
| CN201120464992.5 | 2011-11-21 | ||
| CN201220028841XU CN202377448U (en) | 2011-11-21 | 2012-01-06 | Multifunctional horizontal ring rolling machine |
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| Publication Number | Publication Date |
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| CN202377448U true CN202377448U (en) | 2012-08-15 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201220028841XU Expired - Lifetime CN202377448U (en) | 2011-11-21 | 2012-01-06 | Multifunctional horizontal ring rolling machine |
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| CN (1) | CN202377448U (en) |
Cited By (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102974634A (en) * | 2012-12-04 | 2013-03-20 | 中国航天科技集团公司长征机械厂 | Method for carrying out progressive precision extrusion forming of thin-shelled parts with internal and external teeth based on generating method |
| WO2013075573A1 (en) * | 2011-11-21 | 2013-05-30 | Qian Dongsheng | Multi-functional horizontal-type ring rolling machine |
| CN105642799A (en) * | 2016-03-24 | 2016-06-08 | 邯郸鸿力轴承有限公司 | Planetary multi-station precision cold ring rolling machine |
| CN106270317A (en) * | 2016-08-17 | 2017-01-04 | 黄石哈特贝尔精密锻造有限公司 | Double-piece cold rolling moulding process and mould |
| CN108772514A (en) * | 2018-05-02 | 2018-11-09 | 西北工业大学 | A kind of method that roller instantaneous position is embraced in determining special-shaped ring roll off |
| CN109277505A (en) * | 2018-09-25 | 2019-01-29 | 武汉理工大学 | Middle-size and small-size ring saddle support reaming control device for pivoting and its application method |
| CN111026040A (en) * | 2019-12-29 | 2020-04-17 | 江苏金源高端装备股份有限公司 | Ring rolling intelligent forging control system |
| TWI746243B (en) * | 2020-11-03 | 2021-11-11 | 惠亞工程股份有限公司 | Forming machine for waffle barrel |
| TWI773511B (en) * | 2021-09-03 | 2022-08-01 | 惠亞工程股份有限公司 | Forming machine for waffle barrel |
| TWI780889B (en) * | 2021-09-03 | 2022-10-11 | 惠亞工程股份有限公司 | Macufacturing method for waffle barrel and shaping device |
-
2012
- 2012-01-06 CN CN201220028841XU patent/CN202377448U/en not_active Expired - Lifetime
Cited By (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2013075573A1 (en) * | 2011-11-21 | 2013-05-30 | Qian Dongsheng | Multi-functional horizontal-type ring rolling machine |
| CN102974634A (en) * | 2012-12-04 | 2013-03-20 | 中国航天科技集团公司长征机械厂 | Method for carrying out progressive precision extrusion forming of thin-shelled parts with internal and external teeth based on generating method |
| CN105642799A (en) * | 2016-03-24 | 2016-06-08 | 邯郸鸿力轴承有限公司 | Planetary multi-station precision cold ring rolling machine |
| CN106270317A (en) * | 2016-08-17 | 2017-01-04 | 黄石哈特贝尔精密锻造有限公司 | Double-piece cold rolling moulding process and mould |
| CN108772514A (en) * | 2018-05-02 | 2018-11-09 | 西北工业大学 | A kind of method that roller instantaneous position is embraced in determining special-shaped ring roll off |
| CN109277505A (en) * | 2018-09-25 | 2019-01-29 | 武汉理工大学 | Middle-size and small-size ring saddle support reaming control device for pivoting and its application method |
| CN111026040A (en) * | 2019-12-29 | 2020-04-17 | 江苏金源高端装备股份有限公司 | Ring rolling intelligent forging control system |
| TWI746243B (en) * | 2020-11-03 | 2021-11-11 | 惠亞工程股份有限公司 | Forming machine for waffle barrel |
| TWI773511B (en) * | 2021-09-03 | 2022-08-01 | 惠亞工程股份有限公司 | Forming machine for waffle barrel |
| TWI780889B (en) * | 2021-09-03 | 2022-10-11 | 惠亞工程股份有限公司 | Macufacturing method for waffle barrel and shaping device |
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Owner name: OU GUOSHENG JIANG SHAOCHENG HUA LIN QIAN DONGSHENG Free format text: FORMER OWNER: HUA LIN QIAN DONGSHENG Effective date: 20150729 Owner name: CHENGDU CHENGHUA MACHINERY MANUFACTURING CO., LTD. Free format text: FORMER OWNER: JIANG SHAOCHENG Effective date: 20150729 |
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| C41 | Transfer of patent application or patent right or utility model | ||
| C53 | Correction of patent for invention or patent application | ||
| CB03 | Change of inventor or designer information |
Inventor after: Jiang Shaocheng Inventor after: Hua Lin Inventor after: Qian Dongsheng Inventor after: Ou Guosheng Inventor after: Xia Huashun Inventor before: Jiang Shaocheng Inventor before: Hua Lin Inventor before: Qian Dongsheng |
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| COR | Change of bibliographic data |
Free format text: CORRECT: INVENTOR; FROM: JIANG SHAOCHENG HUA LIN QIAN DONGSHENG TO: JIANG SHAOCHENG HUA LIN QIAN DONGSHENG OU GUOSHENG XIA HUASHUN |
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| TR01 | Transfer of patent right |
Effective date of registration: 20150729 Address after: 610300 Chengdu Industrial Development Zone, Qingbaijiang District Tongji Road (next to the sewage treatment plant), Sichuan Patentee after: CHENGDU CHENGHUA MACHINERY MANUFACTURING CO., LTD. Patentee after: Ou Guosheng Patentee after: Jiang Shaocheng Patentee after: Hua Lin Patentee after: Qian Dongsheng Address before: 200442 Shanghai City, Baoshan District Hua Ling Road 1681 Lane 35, Room 102 Patentee before: Jiang Shaocheng Patentee before: Hua Lin Patentee before: Qian Dongsheng |
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| CX01 | Expiry of patent term |
Granted publication date: 20120815 |
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| CX01 | Expiry of patent term |