CN107791123B - A kind of high revolving speed closed type static pressure rotary table - Google Patents
A kind of high revolving speed closed type static pressure rotary table Download PDFInfo
- Publication number
- CN107791123B CN107791123B CN201710877241.8A CN201710877241A CN107791123B CN 107791123 B CN107791123 B CN 107791123B CN 201710877241 A CN201710877241 A CN 201710877241A CN 107791123 B CN107791123 B CN 107791123B
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- pedestal
- static pressure
- hydrostatic bearing
- revolving speed
- ring
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Classifications
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- 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
- B24B13/00—Machines or devices designed for grinding or polishing optical surfaces on lenses or surfaces of similar shape on other work; Accessories therefor
-
- 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
- B24B41/00—Component parts such as frames, beds, carriages, headstocks
-
- 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
- B24B41/00—Component parts such as frames, beds, carriages, headstocks
- B24B41/06—Work supports, e.g. adjustable steadies
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Magnetic Bearings And Hydrostatic Bearings (AREA)
- Machine Tool Units (AREA)
Abstract
The invention discloses a kind of high revolving speed closed type static pressure rotary tables, including pedestal, the motor with the work top of base rotation cooperation and driving workbench rotation, the lower part of the work top is equipped with shaft fixed vertically, the air passage axially arranged is equipped in shaft, the lower section of the pedestal is equipped with pedestal, the pedestal is equipped with the venthole that can be connected to air passage, and the work top is equipped with the vacuum chuck being connected to air passage, and hydrostatic bearing is equipped between the work top and pedestal.The present invention is intended to provide a kind of compact-sized, higher high revolving speed closed type static pressure rotary table of positioning accuracy.
Description
Technical field
The invention belongs to mirror grinding and polishing field more particularly to a kind of high revolving speed closed type static pressure rotary tables.
Background technique
Eyeglass mirror surface in optical instrument needs to carry out high-precision grinding and polishing, needs to pass through in grinding and polishing
Grinding station is positioned in face of workpiece, and being ground table top at present is using pressure/dynamic-static pressure rotary table face, the dynamic and hydrostatic bearing of table top
Using open architecture, such as China Patent No.: CN201815876U discloses a kind of open-type static pressure revolution work for controlling floatation volume
Platform, the multi-head pump including work table rotation axis adjective-centre structure, hydraulic floating binding clasp, device for revolving and driving and hydraulic fuel feeding,
It is characterized in that workbench turntable body lower cylindrical and the inner hole of bull gear use coaxial basic hole system clearance fit, bull gear is consolidated
It is scheduled on workbench turntable body and falls on slide jointly, be positioned apart from the gap of bull gear protrusion workbench hydraulic floating
Dynamic binding clasp, the static-pressure oil chamber of slide upper surface are connected to the flowline of quantitative multi-head pump；With higher level degree and coarse
The bull gear bottom surface of degree and the static-pressure oil chamber of slide upper surface form hydrostatic slideway pair；Revolution centration axis is mounted on slide
Central part, centration axis and workbench turntable body centre bore use hole base system of fits, and lower spacer ring, upper spacer ring, disk are set in centration axis periphery
Axial thrust cylindrical bearing is disposed between chip type spring and Biserial cylindrical roller bearing, and end cap, disk type are passed down through by bolt
Spring and distribution ring are allowed to and centration axis major diameter upper end locking, realization positioning；Gear reduction box is mounted on slide side, thereon
Two gears and large ring gear meshing drive work table rotation；Circular gratings are installed on centration axis top, realize that workbench circumgyration is closed
Ring measurement.
However, since existing workbench using T-slot positions workpiece, come workpiece pressing in such a way that pressing plate compresses,
Thus need to by the diameter design of rotary table at the diameter for being greater than maximum grinding workpiece, while blank must also reserve compared with
Big precompressed position, and items precision is unstable when the structure of the dynamic and static pressure of open type then will lead to table top pressure-bearing or revolution
It is fixed, and since table top revolving speed is low so causing grinding efficiency low.
Summary of the invention
The present invention be in order to overcome above-mentioned deficiency in the prior art, provide it is a kind of it is compact-sized, positioning accuracy is higher
High revolving speed closed type static pressure rotary table.
To achieve the goals above, the invention adopts the following technical scheme:
A kind of high revolving speed closed type static pressure rotary table, including pedestal, the work top cooperated with base rotation and drive
The motor of dynamic workbench rotation, the lower part of the work top be equipped with shaft fixed vertically, is equipped in shaft and axially arranges
Air passage, the lower section of the pedestal are equipped with pedestal, and the pedestal is equipped with the venthole that can be connected to air passage, the workbench
Face is equipped with the vacuum chuck being connected to air passage, and hydrostatic bearing is equipped between the work top and pedestal.
In the prior art, in order to realize the steady positioning of workpiece, the diameter of workbench has to be larger than maximum grinding workpiece
Diameter, while also biggish precompressed position is reserved for workpiece blank, therefore higher for space requirement, to influence processing essence
Degree.Workpiece to be processed is compressed by T-slot and table positions by the pressing plate on workbench, so that workpiece holds
Easily deform.In the present solution, work is placed on vacuum chuck, using atmospheric pressure increase workpiece to the pressure of table top to
Increase frictional force between the two, may dispense in this way table top because of clamping increased workbench diameter and workpiece blank because
Required reserved position and increased diameter make aobvious more compact of entire table top.Vacuum suction suction is not uniformly and by workpiece
The variation of shape and change, there is no particular/special requirement to workpiece material, be conducive to improve machining accuracy.
Preferably, the vacuum chuck is equipped with the centre bore being connected to air passage, the upper surface of vacuum chuck is equipped with
The annular groove of several arranged concentrics and the radial slot for being connected to each annular groove with centre bore, one of described annular groove
Equipped with sealing ring.In this way, placing sealing ring according to workpiece size when workpiece is located on vacuum chuck, guarantee maximum limit
The covering sealing ring of degree forms the vacuum degree of maximum area, when the vacuum generator outside air passage connection is vacuumized, respectively
The annular groove of a arranged concentric is connected to by radial slot with centre bore, and centre bore is connected to air passage, the ring in sealing ring
Shape slot and radial slot form vacuum degree, generate vacuum adsorption force to workpiece.
Preferably, the hydrostatic bearing is annular in shape, the upper and lower surface of hydrostatic bearing is respectively equipped in hydrostatic bearing
Several static pressure supporting regions of heart arrangement, the static pressure supporting region is fan-shaped, and the inner ring of the hydrostatic bearing is equipped with static pressure
Several radial supporting regions of bearing centre arrangement.The upper and lower surface of hydrostatic bearing is equipped with static pressure supporting region, there is radial hold on inner ring
Area is carried, static pressure supporting region and radial supporting region are contactless bearing area, are had more compared to traditional open hydrostatic bearing
High carrying and stability, when so that workbench may operate at higher revolving speed, distal end bounce and diameter jump still be can control
Smaller range.
Preferably, the bottom of the work top is equipped with fixed bearer ring, the edge of the bearer ring be equipped with it is quiet
The lower acting surface that pressure underside bearing surface is slidably matched, the lower surface of the work top is equipped with matches with hydrostatic bearing upper surface slide
The upper acting surface closed, the pedestal are equipped with the side wall for accommodating hydrostatic bearing and bearer ring, and the side wall and hydrostatic bearing are solid
Fixed connection, the side wall be equipped with the upper through-hole being connected between hydrostatic bearing upper surface, upper acting surface and with static pressure axis
Hold the lower through-hole of lower surface, the connection of lower acting surface.In this way, oil liquid enters hydrostatic bearing upper surface, upper acting surface by upper through-hole
Between, entered between hydrostatic bearing lower surface, lower acting surface by lower through-hole, and enter the inner ring of hydrostatic bearing, thus
Secure support is provided for work top.
Preferably, the side wall upper part of the pedestal is equipped with the upper pressure chamber being connected to upper through-hole, the lower sidewall of pedestal
Equipped with the lower pressure chamber being connected to lower through-hole, the oilhole for being connected to upper through-hole and lower through-hole is equipped in the pedestal.Upper through-hole and
Lower through-hole is respectively equipped with pressure chamber, can play the role of stable oil liquid pressure, reduces pressure oscillation.Meanwhile upper through-hole is under
It is connected between through-hole by oilhole, is conducive to keep through-hole and lower through-hole pressure constant, guarantees the accurate positioning of work top.
Preferably, the oilhole runs through the top of base side wall, the top of the base side wall along vertical direction
Equipped with lower groove, the two sides of the groove are respectively equipped with lower convexity, and the bottom of the work top is equipped with to be cooperated with lower groove
Upper protrusion and the upper groove cooperated with lower convexity.In this way, oil liquid can also establish oil pressure simultaneously at the top of side wall, to assist
Work top is supported, the rotational stability of work top is improved.
Preferably, the bottom of the shaft is equipped with coaxially arranged rotary joint seat, rotary joint seat center is set
There is the central airway being connected to air passage, the side of rotary joint seat is equipped with several side stomatas corresponding with ventilation hole site, institute
The side stomata stated is connected to central airway.Rotary joint seat can opposite base rotation, rotary joint seat during rotation, works as side
Connection both when stomata is corresponding with ventilation hole site can both guarantee that vacuum was inhaled to constantly extract internal air out in this way
The vacuum degree of Pan Chu, and will not influence the rotation of work top.
Preferably, the motor includes stator and the rotor positioned at stator interior, the rotor is set in shaft
Bottom, is equipped with the transmission ring being fixedly connected between rotor bottom and shaft bottom, the stator is fixedly connected with pedestal.Motor
Stator is fixed with pedestal, and rotor is fixed with shaft, and after the structure and workbench of such motor are combined, structure is more tight
It gathers.Cast out retarder and shaft joint simultaneously, the tight-holding type mounting means of original shaft coupling is changed to flange form mounting means, greatly
Connection rigidity is strengthened greatly.
Preferably, the lower section of the pedestal is equipped with Circular gratings, the outer ring of the Circular gratings is fixedly connected with pedestal, described
The inner ring of Circular gratings is fixedly connected with rotary joint seat.Round grating is installed to be allowed to generate close loop control circuit with motor, so as to
Work top cooperation lifting shaft is set to carry out linkage grinding in grinding process.
Preferably, the middle part of the shaft is equipped with baffle ring, shaft is equipped with the locating slot of positioning baffle ring, the baffle ring
Positioned at the top of pedestal.Baffle ring plays acting on for positioning tool when assembly, in order to which component each in shaft carries out installation positioning.
The beneficial effects of the present invention are: suction is uniform when (1) positions workpiece and is not changed by the variation of workpiece shapes,
It avoids being deformed workpiece when locating clip clamping of workpieces, there is no particular/special requirement to workpiece material, positional flexibility is higher；(2) right
Reliable in the positioning stablity of workpiece, work top can still maintain lower distal end bounce and diameter to jump when high revolving speed is ground, and protect
Machining accuracy is demonstrate,proved；(3) retarder and shaft joint are eliminated, structure is more compact, and has greatly reinforced connection rigidity, improves
Transmission accuracy.
Detailed description of the invention
Fig. 1 is a kind of structural schematic diagram of the invention；
Fig. 2 is the structural schematic diagram of vacuum chuck in the present invention；
Fig. 3 is the structural schematic diagram of hydrostatic bearing in the present invention.
In figure: pedestal 1, lower through-hole 1a, oilhole 1b, upper through-hole 1c, upper pressure chamber 1d, side wall 1e, lower pressure chamber 1f, work
Table top 2, vacuum chuck 3, centre bore 3a, annular groove 3b, radial slot 3c, bearer ring 4, hydrostatic bearing 5, static pressure supporting region 5a, diameter
To supporting region 5b, baffle ring 6, motor 7, stator 7a, rotor 7b, transmission ring 8, rotary joint seat 9, central airway 9a, side stomata 9b,
Pedestal 10, venthole 10a, Circular gratings 11, bottom plate 12, shaft 13, air passage 13a.
Specific embodiment
The present invention will be further described with reference to the accompanying drawings and detailed description.
In embodiment as shown in Figure 1, a kind of high revolving speed closed type static pressure rotary table, including pedestal 1, work top 2
With motor 7, wherein work top is located above pedestal, and the lower part of work top is equipped with shaft 13, and the top of shaft is equipped with ladder
Face, the center of work top are equipped with perforative connecting hole, and shaft is carried out using cascaded surface with work top several with merga pass
Bolt is fixed, and fixed aftertable face is in a horizontal position, and shaft is in a vertical position.Air passage 13a is equipped in shaft,
Air passage is axially through shaft.The middle part of shaft is equipped with baffle ring 6, and shaft is equipped with the locating slot of positioning baffle ring, and baffle ring is located at
The top of pedestal.
The bottom of shaft is equipped with coaxially arranged rotary joint seat 9.Rotary joint seat center is equipped with central airway 9a, center
Air flue axially arranges that central airway is connected to air passage along rotary joint seat, the side of rotary joint seat set there are four side stomata
9b, along the radial direction arrangement of rotary joint seat, the inner end of side stomata is connected to side stomata with central airway.The lower section of pedestal is equipped with bottom plate
12 and pedestal 10, bottom plate be fixedly connected with the bottom of pedestal, the center of bottom plate, which penetrates through, to be simultaneously fixedly connected with pedestal, and pedestal is equipped with
The position of venthole 10a, venthole are corresponding with ventilation hole site.
Motor is arranged between pedestal and shaft, and motor includes the stator 7a and rotor 7b positioned at stator interior, rotor
It is set in the bottom of shaft, the transmission ring 8 being fixedly connected, stator and the fixed company of pedestal are equipped between rotor bottom and shaft bottom
It connects.The lower section of pedestal is equipped with Circular gratings 11, and the outer ring of Circular gratings is fixedly connected with pedestal, the inner ring and rotary joint seat of Circular gratings
It is fixedly connected.
Work top is equipped with the vacuum chuck 3 being connected to air passage, and as shown in connection with fig. 2, vacuum chuck is equipped with and ventilation
The centre bore 3a of road connection, the upper surface of vacuum chuck be equipped with several arranged concentrics annular groove 3b and by each annular groove with
The radial slot 3c of centre bore connection, one of annular groove are equipped with sealing ring.
The bottom of work top is equipped with fixed bearer ring 4, and hydrostatic bearing 5, static pressure are equipped between work top and pedestal
Bearing is annularly set on bearer ring.The edge of bearer ring is equipped with the lower acting surface being slidably matched with hydrostatic bearing lower surface,
The lower surface of work top is equipped with the upper acting surface that cooperate with hydrostatic bearing upper surface slide, pedestal be equipped with accommodate hydrostatic bearing with
The side wall 1e of bearer ring, side wall are fixedly connected with hydrostatic bearing, and side wall is equipped between hydrostatic bearing upper surface, upper acting surface
The upper through-hole 1c of the connection and lower through-hole 1a being connected to hydrostatic bearing lower surface, lower acting surface.As shown in connection with fig. 3, static pressure axis
The upper and lower surface held is respectively equipped with the centrally disposed eight static pressure supporting region 5a of hydrostatic bearing, and static pressure supporting region is fan-shaped, quiet
The inner ring that last item is held is equipped with hydrostatic bearing centrally disposed six radial supporting region 5b.
The side wall upper part of pedestal is equipped with the upper pressure chamber 1d being connected to upper through-hole, and the lower sidewall of pedestal is equipped with and lower through-hole
The lower pressure chamber 1f of connection, pedestal is interior to be equipped with the oilhole for being connected to upper through-hole and lower through-hole.Oilhole runs through pedestal along vertical direction
The top at the top of side wall, base side wall is equipped with lower groove, and the two sides of groove are respectively equipped with lower convexity, and the bottom of work top is set
There is the upper groove with the upper protrusion of lower groove cooperation and with lower convexity cooperation.
In actual moving process, workpiece to be ground is placed on the vacuum chuck of work top, chooses suitable ruler
Very little sealing ring is put into the annular groove of vacuum chuck, so that having good leakproofness between workpiece and vacuum chuck.Bottom
The upper through-hole and lower through-hole of seat are connect with external oil line pipe, by external oil line pipe to oil pressure is provided in pedestal, so that quiet
The upper surface that last item is held is separated with work top, and the inner ring of hydrostatic bearing and lower surface are separated with bearer ring.The venthole of pedestal
Vacuum generator outside connection, starting vacuum generator is evacuated outward, by absorption of workpieces on vacuum chuck.After electric motor starting
Work top rotation is driven, vacuum generator continues to generate vacuum degree at vacuum chuck when being ground, hydrostatic bearing
Upper and lower surface and inner ring generate oil pressure and carry out stablizing support to work top, guarantee the machining accuracy of workpiece.
Claims (8)
1. a kind of high revolving speed closed type static pressure rotary table, characterized in that including pedestal (1), the work being rotatably assorted with pedestal (1)
Make table top (2) and drive the motor (7) of workbench rotation, the lower part of the work top (2) is equipped with shaft fixed vertically
(13), the air passage (13a) axially arranged is equipped in shaft (13), the lower section of the pedestal (1) is equipped with pedestal (10), the base
Seat (10) is equipped with the venthole (10a) that can be connected to air passage (13a), and the work top (2) is equipped with and air passage
The vacuum chuck (3) of (13a) connection, is equipped with hydrostatic bearing (5) between the work top (2) and pedestal (1), the pedestal
(1) lower section is equipped with Circular gratings (11), and the outer ring of the Circular gratings (11) is fixedly connected with pedestal (10), the Circular gratings (11)
Inner ring be fixedly connected with rotary joint seat (9), the middle part of the shaft (13) is equipped with baffle ring (6), and shaft (13) is equipped with fixed
The locating slot of position baffle ring (6), the baffle ring (6) are located at the top of pedestal (1).
2. a kind of high revolving speed closed type static pressure rotary table according to claim 1, characterized in that the vacuum chuck
(3) it is equipped with the centre bore (3a) being connected to air passage (13a), the upper surface of vacuum chuck (3) is equipped with the ring of several arranged concentrics
Shape slot (3b) and the radial slot (3c) for being connected to each annular groove (3b) with centre bore (3a), the annular groove (3b) is wherein
One of be equipped with sealing ring.
3. a kind of high revolving speed closed type static pressure rotary table according to claim 1 or 2, characterized in that the static pressure
Annularly, the upper and lower surface of hydrostatic bearing (5) is respectively equipped with is held bearing (5) with the centrally disposed several static pressure of hydrostatic bearing (5)
It carries area (5a), the static pressure supporting region (5a) is fan-shaped, and the inner ring of the hydrostatic bearing (5) is equipped with hydrostatic bearing (5)
Centrally disposed several radial supporting regions (5b).
4. a kind of high revolving speed closed type static pressure rotary table according to claim 1 or 2, characterized in that the workbench
The bottom in face (2) is equipped with fixed bearer ring (4), and the edge of the bearer ring (4) is equipped with to be slided with hydrostatic bearing (5) lower surface
The lower acting surface of cooperation, the lower surface of the work top (2) are equipped with the upper effect cooperated with hydrostatic bearing (5) upper surface slide
Face, the pedestal (1) are equipped with the side wall (1e) for accommodating hydrostatic bearing (5) and bearer ring (4), the side wall (1e) and static pressure
Bearing (5) is fixedly connected, and the side wall (1e) is upper equipped with being connected between hydrostatic bearing (5) upper surface, upper acting surface
Through-hole (1c) and the lower through-hole (1a) being connected to hydrostatic bearing (5) lower surface, lower acting surface.
5. a kind of high revolving speed closed type static pressure rotary table according to claim 4, characterized in that the pedestal (1)
The side wall top (1e) is equipped with the upper pressure chamber (1d) being connected to upper through-hole (1c), and the side wall lower part (1e) of pedestal (1) is equipped with under
The lower pressure chamber (1f) of through-hole (1a) connection, the pedestal (1) is interior to be equipped with the oil for being connected to upper through-hole (1c) and lower through-hole (1a)
Hole.
6. a kind of high revolving speed closed type static pressure rotary table according to claim 5, characterized in that the oilhole along
Vertical direction runs through the top of pedestal (1) side wall (1e), and the top of pedestal (1) side wall (1e) is equipped with lower groove, described recessed
The two sides of slot are respectively equipped with lower convexity, and the bottom of the work top (2) is equipped with the upper protrusion cooperated with lower groove and under
The upper groove of male cooperation.
7. a kind of high revolving speed closed type static pressure rotary table according to claim 1 or 2, characterized in that the shaft
(13) bottom is equipped with coaxially arranged rotary joint seat (9), and rotary joint seat (9) center is equipped with and air passage (13a)
The side of the central airway (9a) of connection, rotary joint seat (9) is equipped with several side corresponding with the venthole position (10a) stomatas
(9b), the side stomata (9b) are connected to central airway (9a).
8. a kind of high revolving speed closed type static pressure rotary table according to claim 1 or 2, characterized in that the motor (7)
Including stator (7a) and it is located at stator (7a) internal rotor (7b), the rotor (7b) is set in the bottom of shaft (13),
The transmission ring (8) being fixedly connected is equipped between the rotor bottom (7b) and shaft (13) bottom, the stator (7a) and pedestal (1) are solid
Fixed connection.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710877241.8A CN107791123B (en) | 2017-09-25 | 2017-09-25 | A kind of high revolving speed closed type static pressure rotary table |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710877241.8A CN107791123B (en) | 2017-09-25 | 2017-09-25 | A kind of high revolving speed closed type static pressure rotary table |
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| Publication Number | Publication Date |
|---|---|
| CN107791123A CN107791123A (en) | 2018-03-13 |
| CN107791123B true CN107791123B (en) | 2019-06-07 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201710877241.8A Active CN107791123B (en) | 2017-09-25 | 2017-09-25 | A kind of high revolving speed closed type static pressure rotary table |
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Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108500648A (en) * | 2018-05-17 | 2018-09-07 | 深圳市湘聚实业有限公司 | A kind of axial brake rotary workbench with vacuum suction |
| CN109707723A (en) * | 2019-01-22 | 2019-05-03 | 上海提牛机电设备有限公司 | A kind of rotatory vacuum axis group |
| CN111390845B (en) * | 2019-11-26 | 2023-05-05 | 浙江杭机股份有限公司 | Static pressure rotary worktable |
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| CN205817307U (en) * | 2016-07-14 | 2016-12-21 | 贵州凯博机电科技有限公司 | The air supporting lathe of outer rotor motor driven |
| CN207272921U (en) * | 2017-09-25 | 2018-04-27 | 杭州杭机股份有限公司 | High rotating speed closed type static pressure rotary table |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1350907A (en) * | 2000-10-31 | 2002-05-29 | 莱卡照相机股份公司 | Support device for multiple chucks |
| JP2002172551A (en) * | 2000-12-05 | 2002-06-18 | Ricoh Co Ltd | Curved face grinding device and method |
| CN101407024A (en) * | 2008-11-25 | 2009-04-15 | 吴行飞 | High precision high rigidity closed type fluid static pressure / dynamic-static pressure rotary table |
| CN103801944A (en) * | 2014-03-10 | 2014-05-21 | 北京微纳精密机械有限公司 | Large-diameter aerostatic turntable structure |
| CN104526369A (en) * | 2014-12-26 | 2015-04-22 | 重庆斯凯迪轴瓦有限公司 | Workbench rotating control device of numerical control machine tool |
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| CN107791123A (en) | 2018-03-13 |
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Address after: 311305 No. 68 Qingshan Avenue, Linan Economic Development Zone, Hangzhou City, Zhejiang Province Applicant after: ZHEJIANG HANGJI Co.,Ltd. Address before: 311305 No. 68 Qingshan Avenue, Linan Economic Development Zone, Hangzhou City, Zhejiang Province Applicant before: HANGZHOU HANGJI MACHINE TOOL CO.,LTD. |
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| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| PE01 | Entry into force of the registration of the contract for pledge of patent right | ||
| PE01 | Entry into force of the registration of the contract for pledge of patent right |
Denomination of invention: A High Speed Closed Hydrostatic Rotary Table Effective date of registration: 20221216 Granted publication date: 20190607 Pledgee: Zhejiang Chongzhou Commercial Bank Co.,Ltd. Pujiang Sub branch Pledgor: ZHEJIANG HANGJI Co.,Ltd. Registration number: Y2022330003703 |