WO2011009425A1 - Vorrichtung zum walzen eines exzentrischen rotationsbauteils, walzmaschine und verfahren sowie exzentrisches rotationsbauteil - Google Patents
Vorrichtung zum walzen eines exzentrischen rotationsbauteils, walzmaschine und verfahren sowie exzentrisches rotationsbauteil Download PDFInfo
- Publication number
- WO2011009425A1 WO2011009425A1 PCT/DE2010/000601 DE2010000601W WO2011009425A1 WO 2011009425 A1 WO2011009425 A1 WO 2011009425A1 DE 2010000601 W DE2010000601 W DE 2010000601W WO 2011009425 A1 WO2011009425 A1 WO 2011009425A1
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- rolling
- eccentric
- tool according
- tool
- eccentric rotary
- Prior art date
Links
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B24—GRINDING; POLISHING
- B24B—MACHINES, DEVICES, OR PROCESSES FOR GRINDING OR POLISHING; DRESSING OR CONDITIONING OF ABRADING SURFACES; FEEDING OF GRINDING, POLISHING, OR LAPPING AGENTS
- B24B27/00—Other grinding machines or devices
- B24B27/003—Other grinding machines or devices using a tool turning around the work-piece
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21H—MAKING PARTICULAR METAL OBJECTS BY ROLLING, e.g. SCREWS, WHEELS, RINGS, BARRELS, BALLS
- B21H3/00—Making helical bodies or bodies having parts of helical shape
- B21H3/12—Making helical bodies or bodies having parts of helical shape articles with helicoidal surface
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23P—METAL-WORKING NOT OTHERWISE PROVIDED FOR; COMBINED OPERATIONS; UNIVERSAL MACHINE TOOLS
- B23P9/00—Treating or finishing surfaces mechanically, with or without calibrating, primarily to resist wear or impact, e.g. smoothing or roughening turbine blades or bearings; Features of such surfaces not otherwise provided for, their treatment being unspecified
- B23P9/02—Treating or finishing by applying pressure, e.g. knurling
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B24—GRINDING; POLISHING
- B24B—MACHINES, DEVICES, OR PROCESSES FOR GRINDING OR POLISHING; DRESSING OR CONDITIONING OF ABRADING SURFACES; FEEDING OF GRINDING, POLISHING, OR LAPPING AGENTS
- B24B39/00—Burnishing machines or devices, i.e. requiring pressure members for compacting the surface zone; Accessories therefor
- B24B39/04—Burnishing machines or devices, i.e. requiring pressure members for compacting the surface zone; Accessories therefor designed for working external surfaces of revolution
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B24—GRINDING; POLISHING
- B24B—MACHINES, DEVICES, OR PROCESSES FOR GRINDING OR POLISHING; DRESSING OR CONDITIONING OF ABRADING SURFACES; FEEDING OF GRINDING, POLISHING, OR LAPPING AGENTS
- B24B39/00—Burnishing machines or devices, i.e. requiring pressure members for compacting the surface zone; Accessories therefor
- B24B39/04—Burnishing machines or devices, i.e. requiring pressure members for compacting the surface zone; Accessories therefor designed for working external surfaces of revolution
- B24B39/045—Burnishing machines or devices, i.e. requiring pressure members for compacting the surface zone; Accessories therefor designed for working external surfaces of revolution the working tool being composed of a plurality of working rolls or balls
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
- Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
- Y10T29/00—Metal working
- Y10T29/47—Burnishing
- Y10T29/476—Continuous feed
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
- Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
- Y10T428/00—Stock material or miscellaneous articles
- Y10T428/24—Structurally defined web or sheet [e.g., overall dimension, etc.]
- Y10T428/24628—Nonplanar uniform thickness material
Definitions
- the invention relates to a tool for rolling an eccentric rotary component with an eccentric component, in particular an eccentric screw shaft, a method for producing a rolled rotary component and a rotary component.
- eccentric screw shafts which are also called mono pump shafts, could hardly be larger. From the food industry, through crude oil production to vehicle construction, shipbuilding and a large number of other areas of application, eccentric screw shafts can be found, where they are used to convey a wide variety of media.
- Eccentric screw shafts are produced by whirling in lengths of up to 6 meters. In many cases, the surfaces become hardened or hard chromed. Subsequently, a complex polishing of the surface.
- the problem is solved according to a first aspect of the invention by a tool for rolling an eccentric rotary component with an eccentric portion, in particular for rolling an eccentric screw shaft, wherein the tool has a rotating device with a rolling device, so that the eccentric portion through the Rolling device is rollable.
- This tool can be used to smooth and reshape the surface. Furthermore, during rolling, solidification or improvement of compressive residual stresses with respect to corrosion and wear can be achieved. Thus, an eccentric worm shaft can be provided, in which an extension of the component life is ensured. [09] The following is explained:
- the "tool” can be operated with a rolling machine, such as a whirling machine or a lathe, in which tool the eccentric screw shaft to be machined can be inserted so that the eccentric portions are rolled.
- a rolling machine such as a whirling machine or a lathe, in which tool the eccentric screw shaft to be machined can be inserted so that the eccentric portions are rolled.
- the "eccentric portion" of the eccentric rotary component has a pitch, so that, for example, in the case of an eccentric worm shaft, a conveying principle can be realized as with an Archimedean screw this non-eccentric portion is used in particular for inclusion in a motor.
- rotation takes place in particular about an axis of rotation of the eccentric rotational component, which axis of rotation can be aligned axially or coaxially to the conveying direction of an eccentric screw shaft.
- the rolling device By rolling, particularly smoothing or rolling, the surface of the eccentric component can be deformed by the rolling device the rolling device carried out a circumferential rolling.
- a fixed stator is provided, which is configured statically in relation to the rotation device. About this stator, a flanging can be done to a rolling machine directly or via a tool holder.
- the rolling means may comprise a hydrostatic roll-flat member having a ball insert with a hard material component.
- Such hydrostatic smooth rolling elements can be configured, for example, according to DE 103 40 267 A1 or DE 101 33 314 A1.
- the hard material component consists wholly or partly of ceramic.
- the ball can be made of ceramic in the ball insert or coated with ceramics.
- the rolling device or the smooth rolling element has a stroke of approximately between 1 mm and 20 mm, wherein the stroke is in particular about 8.5 mm.
- the rolling means may have two, three, four or more inwardly directed rolling elements.
- the rotation device is coupled to a drive unit of another rolling machine.
- the rotation device can be impressed by means of the rolling machine, so that rolling on the eccentric screw shaft can take place completely.
- the tool preferably has a displacement device.
- surfaces can be rolled along a rotational axis direction of the rotary component.
- the rolling machine can also or alternatively have such a displacement device.
- a whirling machine the eccentric rotary member so lead by means of feed through the tool that a displacement of the hydrostatic smooth rolling elements in or against the feed direction can be omitted.
- the tool can have a centering device.
- This centering device can be designed so that a uniform adaptation to the eccentric rotary component takes place.
- the tool is configured so that a rolling force of between 1,000 N and 20,000 N acts on the eccentric rotary member. Depending on the intended use, a rolling force of about 4,000 N may be particularly preferred.
- the eccentric screw shaft advantageous properties can be impressed. This is below Another reason is that the rolling force can cause a change in the surface of the eccentric rotary component.
- the tool can be designed so that a hardening of a surface rim zone by 2% to 40%, in particular by 10% to 20%, takes place.
- the rotator may be capable of imparting a rotational speed of 100 revolutions per minute to 2,000 revolutions per minute, in particular between 500 revolutions per minute and 800 revolutions per minute.
- the rotational speed of rotation may be higher than the rotational speed imparted to the eccentric rotating member such that the entire surface of the eccentric rotating member is rollable.
- the rotator speed may be coupled via a transmission to the speed of the eccentric rotary member.
- the tool may have a peeling device for machining an original rotary component, so that the eccentric rotary component is produced by the machining.
- the object is achieved by a rolling machine, in particular a whirling machine or lathe, with a previously described tool.
- a machine can be provided by which a rolled eccentric rotary member can be produced. It should be noted that it can be in the vortex machines to standard machines for generating eccentric screw shafts.
- the object can be achieved by a method for producing a rolled eccentric rotary component, in which an eccentric rotary component is produced by means of the above-described rolling machine.
- the eccentric rotary component or the Urrotationsbauteil is mounted in the rolling machine with the tool described above so that by machining the eccentric rotary member can arise.
- the object is achieved by an eccentric rotary component, which can be produced by the method described above.
- the object can be achieved by an eccentric rotary component in which an eccentric portion is rolled.
- a surface peripheral zone of the eccentric portion may be solidified by 2% to 40%, particularly by 10% to 20%.
- the eccentric portion is rolled with a rolling force of between 1,000 N and 20,000 N, in particular with 4,000 N.
- a special way of machining the surface of the eccentric rotary member can be provided.
- a part of the eccentric rotating member may be hardened before rolling.
- prefabricated and hardened eccentric screw shafts can be rolled.
- the object can be achieved by a rolling process for producing a rolled eccentric rotary component, wherein in a first step, a peeling of a Urrotationsbauteils and in a second step, an eccentric rolling and the two steps in one Walzmaschinenaufposition done.
- the peeling can be carried out by means of a ceramic tool.
- an eccentric rotary component can be produced from a primary rotation component which is also rolled at the same time.
- a separate clamping and consequent errors or material or processing impairments can thus be omitted.
- the peeling tool can be combined with the rolling tool, or it can be a tool change without Aufspann thumbnail.
- a distance between the two tools is preferably adjustable.
- FIG. 1a is a schematic frontal view of a rotation device with a rolling device
- FIG. Ib is a further schematic frontal view of the rotation device with rolling device
- Fig. 2 is a schematic side view of the rotation device with
- FIG. 3 shows a schematic frontal view of a partial section of the rotary device
- FIG. 4 shows a schematic spatial view of the rotating device with rolling device and associated stator
- FIG. 5 shows a schematic spatial view of the rotating device with rolling device with an inserted eccentric screw shaft
- Fig. 6 in a schematic side view of a hydrostatic
- a tool A has a rotating device R with attached hydrostatic smooth rolling elements 410.
- the tool A is coupled to a whirling machine.
- an eccentric screw shaft B is conveyed by the tool A in a feed direction V by means of the swirling machine (not shown).
- the feed rate is 0.2 mm per revolution of the rotary device R.
- the whirling machine is designed so that eccentric portions of the eccentric screw shaft B are compensated at a contact feed position 510, so that a vertical and / or horizontal displacement of the hydrostatic smooth rolling elements 410 is omitted.
- the turbomachine ensures that at a certain position with respect to the feed direction, the eccentric screw shaft always has the same vertical and horizontal position perpendicular to the feed direction during the conveyance of the eccentric screw shaft B.
- the rotating device R rotates in the direction of the arrow around the eccentric screw shaft B.
- the hydrostatic smooth rolling elements 410 fastened with the rotating device act on the eccentric screw shaft B with a force of 4,000 N. This results in rolling of the eccentric screw shaft B.
- the eccentric screw shaft B is fully rolled at the contact feed position 510.
- the whirling machine conveys the eccentric worm shaft B further in the feed direction V, so that a non-rolled part of the eccentric screw shaft B abuts against the contact feed position 510.
- By rotating the rotary element R and the associated rolling by means of the smooth rolling elements of the previously non-rolled portion of the eccentric screw shaft B is rolled.
- the smooth rolling elements 410 have a spherical tip 630, 410.2. Due to the spherical shape, the smooth rolling element 410 of the eccentric screw pitch can be slightly adjusted. [45] The structure of the tool A will be explained below with reference to FIGS. 1 to 4.
- the rotation element R is connected to a stator.
- the stator comprises a receptacle 10 with three sealing pistons 270 and a threaded pin 40, as well as a bearing ring 100 and a cam ring 50 and two angular contact ball bearings 20, 80.
- the tool A is connected by means of the stator with a standing part of the whirling machine with its sealing piston 270 and the driver rotatably 250.
- the driver 250 secures the stator S against rotation.
- a cooling piston 270 which is required for the rolling process, is supplied via a sealing piston 270 and passed via bores B 1 of the receptacle 10 into a cavity H of the housing 70. As a coolant oil is used alternatively.
- the shaft sealing rings 150 prevent unwanted fluid loss from the cavity H.
- the threaded pin 40 prevents turning of the cam ring 50.
- the 7 mm lifting height of the cam ring 50 are converted into an axial stroke movement on the pistons of the pump elements 190.
- the sliders 170 prevent the generation of a transverse force on the pistons of the pump elements 190.
- the rotation device R comprises the housing 70 with the centering unit and six holes for screwing the tool A to the whirling machine.
- the five pump elements 190 are mounted in the housing 70.
- Sliders 170 prevent direct contact of the pistons of the pump elements 170 with the cam ring 50.
- the sealing flange 210 is in screwed the housing 270 and receives the shaft seal 150, which is held by the holding plate 230 in position.
- the intermediate piece 300 is screwed against the housing 70. This intermediate piece 300 receives the smooth rolling elements 410 in addition to the pressure limiting valve 370 via the adapter 350, which act here as a rolling device.
- the ring 470 is used to stabilize the smooth rolling elements 410. Between the housing 70 and the intermediate piece 300 there is the cover 130 screwed to the housing 70. The cover 130 absorbs the shaft sealing ring 150.
- the roller rolling elements 410 acting as rolling device drive the ball insert 410.1 within its stroke of 8.5 mm until the ball 410.2 has contact with the workpiece surface.
- the workpiece is continuously smoothed or firmly rolled. Due to the freely selectable pressure and feed, the roll results can be excellently influenced and optimized.
Abstract
Description
Claims
Priority Applications (5)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
CA2768622A CA2768622A1 (en) | 2009-07-21 | 2010-05-31 | A device for rolling an eccentric rotational component, a rolling machine and a method as well as an eccentric rotational component |
US13/384,991 US20120196092A1 (en) | 2009-07-21 | 2010-05-31 | Device for rolling an eccentric rotational component, rolling machine, method, and eccentric rotational component |
DE112010003041T DE112010003041A5 (de) | 2009-07-21 | 2010-05-31 | Vorrichtung zum Walzen eines exzentrischen Rotationsbauteils, Walzmaschine und Verfahren sowie exzentrisches Rotationsbauteil |
CN2010800421937A CN102666013A (zh) | 2009-07-21 | 2010-05-31 | 用于轧制偏心旋转构件的装置、轧机和方法以及偏心旋转构件 |
EP10734641A EP2456597A1 (de) | 2009-07-21 | 2010-05-31 | Vorrichtung zum walzen eines exzentrischen rotationsbauteils, walzmaschine und verfahren sowie exzentrisches rotationsbauteil |
Applications Claiming Priority (4)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE102009034291 | 2009-07-21 | ||
DE102009034291.5 | 2009-07-21 | ||
DE102010008694.0 | 2010-02-19 | ||
DE102010008694A DE102010008694A1 (de) | 2009-07-21 | 2010-02-19 | Vorrichtung zum Walzen eines exzentrischen Rotationsbauteils, Walzmaschine und Verfahren sowie exzentrisches Rotationsbauteil |
Publications (1)
Publication Number | Publication Date |
---|---|
WO2011009425A1 true WO2011009425A1 (de) | 2011-01-27 |
Family
ID=43430252
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
PCT/DE2010/000601 WO2011009425A1 (de) | 2009-07-21 | 2010-05-31 | Vorrichtung zum walzen eines exzentrischen rotationsbauteils, walzmaschine und verfahren sowie exzentrisches rotationsbauteil |
Country Status (7)
Country | Link |
---|---|
US (1) | US20120196092A1 (de) |
EP (1) | EP2456597A1 (de) |
KR (1) | KR20120068814A (de) |
CN (1) | CN102666013A (de) |
CA (1) | CA2768622A1 (de) |
DE (2) | DE102010008694A1 (de) |
WO (1) | WO2011009425A1 (de) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN105081673A (zh) * | 2015-07-31 | 2015-11-25 | 安庆市鼎立汽车配件有限公司 | 一种气门锁夹槽的滚压装置 |
Families Citing this family (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US10245628B2 (en) * | 2016-03-02 | 2019-04-02 | Mojtaba Pourbashiri | Ultra-fine wire fabricating apparatus and method |
CN109909675A (zh) * | 2019-03-12 | 2019-06-21 | 浙江工业大学 | 轴类零件滚压加工装置 |
CN115008208B (zh) * | 2022-06-20 | 2023-11-28 | 安徽工业大学 | 一种大型不锈钢环件切割装置 |
Citations (7)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE644268C (de) * | 1934-07-03 | 1937-04-28 | Ver Deutsche Metallwerke A G Z | Praegepoliervorrichtung |
SU880706A1 (ru) * | 1980-02-05 | 1981-11-15 | Московский Автомобильный Завод Им. И.А.Лихачева (Производственное Объединение "Зил") | Способ обработки цилиндрических деталей вращающимс инструментом |
DE19534631A1 (de) * | 1995-09-19 | 1997-03-20 | Hegenscheidt Werkzeugtechnik G | Verfahren und Vorrichtung zum Bearbeiten einer Werkstückoberfläche mit einem in einem hydrostatischen Lager gelagerten Walzkörper |
DE10133314A1 (de) | 2001-07-12 | 2003-01-23 | Ecoroll Ag | Verfahren und Werkzeug zum Walzen eines Werkstücks und Anordnung aus einem Walzwerkzeug und einem Werkstück |
DE10340267A1 (de) | 2003-08-29 | 2005-03-17 | Ecoroll Ag Werkzeugtechnik | Walzwerkzeug und Walzrolle zum Walzen, insbesondere Festwalzen, eines Werkstücks |
RU2354530C1 (ru) * | 2007-12-10 | 2009-05-10 | Государственное образовательное учреждение высшего профессионального образования "Орловский государственный технический университет" (ОрелГТУ) | Способ роторного упрочнения сложнопрофильных поверхностей |
EP2147746A2 (de) * | 2008-07-24 | 2010-01-27 | Artemis Kautschuk- und Kunststoff-Technik GmbH | Verfahren und Maschine zur Herstellung eines Rotors einer Exzenterschneckenpumpe |
Family Cites Families (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US2040347A (en) * | 1934-09-29 | 1936-05-12 | Lavine Gear Company | Means for finishing helical forms |
US3818559A (en) * | 1973-02-16 | 1974-06-25 | Deere & Co | Burnishing tool |
DE19919893A1 (de) * | 1999-04-30 | 2000-11-09 | Junker Erwin Maschf Gmbh | Vor- und Fertigschleifen einer Kurbelwelle in einer Aufspannung |
US20050107230A1 (en) * | 2003-08-29 | 2005-05-19 | Ecoroll Ag Werkzeugtechnik | Rolling tool and roller for rolling, particularly deep rolling, a work piece |
-
2010
- 2010-02-19 DE DE102010008694A patent/DE102010008694A1/de not_active Withdrawn
- 2010-05-31 CN CN2010800421937A patent/CN102666013A/zh active Pending
- 2010-05-31 CA CA2768622A patent/CA2768622A1/en not_active Abandoned
- 2010-05-31 DE DE112010003041T patent/DE112010003041A5/de not_active Withdrawn
- 2010-05-31 EP EP10734641A patent/EP2456597A1/de not_active Withdrawn
- 2010-05-31 US US13/384,991 patent/US20120196092A1/en not_active Abandoned
- 2010-05-31 KR KR1020127001560A patent/KR20120068814A/ko not_active Application Discontinuation
- 2010-05-31 WO PCT/DE2010/000601 patent/WO2011009425A1/de active Application Filing
Patent Citations (7)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE644268C (de) * | 1934-07-03 | 1937-04-28 | Ver Deutsche Metallwerke A G Z | Praegepoliervorrichtung |
SU880706A1 (ru) * | 1980-02-05 | 1981-11-15 | Московский Автомобильный Завод Им. И.А.Лихачева (Производственное Объединение "Зил") | Способ обработки цилиндрических деталей вращающимс инструментом |
DE19534631A1 (de) * | 1995-09-19 | 1997-03-20 | Hegenscheidt Werkzeugtechnik G | Verfahren und Vorrichtung zum Bearbeiten einer Werkstückoberfläche mit einem in einem hydrostatischen Lager gelagerten Walzkörper |
DE10133314A1 (de) | 2001-07-12 | 2003-01-23 | Ecoroll Ag | Verfahren und Werkzeug zum Walzen eines Werkstücks und Anordnung aus einem Walzwerkzeug und einem Werkstück |
DE10340267A1 (de) | 2003-08-29 | 2005-03-17 | Ecoroll Ag Werkzeugtechnik | Walzwerkzeug und Walzrolle zum Walzen, insbesondere Festwalzen, eines Werkstücks |
RU2354530C1 (ru) * | 2007-12-10 | 2009-05-10 | Государственное образовательное учреждение высшего профессионального образования "Орловский государственный технический университет" (ОрелГТУ) | Способ роторного упрочнения сложнопрофильных поверхностей |
EP2147746A2 (de) * | 2008-07-24 | 2010-01-27 | Artemis Kautschuk- und Kunststoff-Technik GmbH | Verfahren und Maschine zur Herstellung eines Rotors einer Exzenterschneckenpumpe |
Non-Patent Citations (2)
Title |
---|
OSTERTAG A ET AL: "Zerspanen und Glattwalzen in Kombination", WERKSTATT UND BETRIEB, CARL HANSER VERLAG GMBH & CO. KG, DE, vol. 142, no. 1/2, 1 February 2009 (2009-02-01), pages 24 - 27, XP001519978, ISSN: 0043-2792 * |
RÖTTGER K ET AL: "Festwalzen von Exzenterschneckenwellen", WERKSTATT UND BETRIEB, CARL HANSER VERLAG GMBH & CO. KG, DE, vol. 143, no. 1-2, 1 January 2010 (2010-01-01), pages 28 - 29, XP001551437, ISSN: 0043-2792 * |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN105081673A (zh) * | 2015-07-31 | 2015-11-25 | 安庆市鼎立汽车配件有限公司 | 一种气门锁夹槽的滚压装置 |
Also Published As
Publication number | Publication date |
---|---|
EP2456597A1 (de) | 2012-05-30 |
KR20120068814A (ko) | 2012-06-27 |
US20120196092A1 (en) | 2012-08-02 |
DE112010003041A5 (de) | 2012-06-06 |
DE102010008694A1 (de) | 2011-02-10 |
CN102666013A (zh) | 2012-09-12 |
CA2768622A1 (en) | 2011-01-27 |
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