CN102554278A - Evenly divided oil cavity static-dynamic pressure shafting unit for machine tool - Google Patents
Evenly divided oil cavity static-dynamic pressure shafting unit for machine tool Download PDFInfo
- Publication number
- CN102554278A CN102554278A CN2012100086075A CN201210008607A CN102554278A CN 102554278 A CN102554278 A CN 102554278A CN 2012100086075 A CN2012100086075 A CN 2012100086075A CN 201210008607 A CN201210008607 A CN 201210008607A CN 102554278 A CN102554278 A CN 102554278A
- Authority
- CN
- China
- Prior art keywords
- oil pocket
- bearing shell
- main shaft
- dynamic pressure
- equilibrium oil
- 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.)
- Granted
Links
Images
Abstract
The invention discloses an evenly divided oil cavity static-dynamic pressure shafting unit for a machine tool, which comprises a spindle box and a spindle. A front bearing bush, a rear bearing bush and a rear gland are mounted on the spindle box, the front bearing bush is provided with front evenly divided oil cavities, the rear bearing bush is provided with rear evenly divided oil cavities, and the number of the front evenly divided oil cavities and/or the rear evenly divided oil cavities is an odd number larger than or equal to three. An evenly divided oil cavity static-dynamic pressure shaft grinding unit is different from existing quadrant or sexenary evenly divided oil cavities, larger than or equal to three odd evenly divided oil cavities are used, and the rotating precision of the spindle is greatly improved and reaches 0.15 micrometer and even is higher.
Description
Technical field
The present invention relates to precision optical machinery and make the field, particularly a kind of quiet dynamic pressure axle of five equilibrium oil pocket that is used for lathe is the unit.
Background technology
Influencing the machined part factors of accuracy has a lot; But this wherein most important one is exactly the accuracy class of the lathe (for example grinding machine, lathe, machining center etc.) of processing equipment part itself; Along with to the machined part precision require increasingly high; Comprehensive rotating accuracy to the high speed rotary main shaft of lathe has also just proposed increasingly high requirement; Oneself reaches more than the 20000r/min like the speed of mainshaft of some high-speed high-power high precision numerical control grinding machines, machining center, require less than 0.2 μ m for the comprehensive rotating accuracy of main shaft, in addition higher.
The existing quiet dynamic pressure axle of the five equilibrium oil pocket grinding tool unit that is used for (grinding machine, the machining center etc.) of lathe; Comprise the main shaft casing, this main shaft casing is installed on the lathe, and the main shaft of rotation at a high speed is installed in the main shaft casing; Main shaft one end is connected with emery wheel (when being used for grinding machine); The other end is connected with drive, main axis rotation by the drive band, and preceding bearing shell, back bearing shell and rear pressing cover are installed in the main shaft casing; All be provided with the five equilibrium oil pocket in preceding bearing shell, back on the bearing shell, traditional mode is to adopt branch oil pockets such as even number such as four or six at preceding bearing shell, back bearing shell.Wherein, the most common with quartering oil pocket, use the most extensive; But, though branch oil pockets such as even number can satisfy the needs of general lathe for precision, for the high accuracy spindle rotation accuracy less than 0.2 μ m; Reach 0.15 μ m even higher the time, just do not reached.
Summary of the invention
The present invention be directed to the weak point of prior art, it is the unit that a kind of quiet dynamic pressure axle of five equilibrium oil pocket that is used for lathe is provided, and it can make the rotating accuracy of main shaft improve greatly.
For solving the problems of the technologies described above, technical scheme of the present invention is following; A kind of quiet dynamic pressure axle of five equilibrium oil pocket that is used for lathe is the unit; Comprise main shaft casing, main shaft; Preceding bearing shell, back bearing shell are installed on the described main shaft casing; Five equilibrium oil pocket before said preceding bearing shell is provided with, said back bearing shell is provided with the back and waits the branch oil pocket, and the quantity of branch oil pockets such as said preceding five equilibrium oil pocket and/or said back is the odd number more than or equal to three.
As preferably, said before the quantity of branch oil pockets such as five equilibrium oil pocket and/or said back be 3,5,7.
As preferably, said before the quantity of branch oil pockets such as five equilibrium oil pocket and/or said back be 5.
As preferably, the rear end of described main shaft is equipped with drive.
As preferably; Said rear-end of spindle has an axially loaded annulus; The trailing flank of said back bearing shell is provided with the annular groove that matches with the leading flank of said axially loaded annulus; Said main shaft box back is fixed with rear pressing cover, and the leading flank of said rear pressing cover is provided with the annular groove that matches with the trailing flank of said axially loaded annulus.
As preferably, said before bearing shell and/or back bearing shell assemble with described main spindle box body by integral forming or split.
As preferably, described main shaft have with said before bearing shell, back the bearing shell preceding shaft shoulder, the middle shaft shoulder that match.
As preferably, described lathe is lathe or grinding machine.
Beneficial effect of the present invention is: the quiet dynamic pressure axle of five equilibrium oil pocket of the present invention grinding tool unit; Different with the existing employing quartering or six five equilibrium oil pockets; What adopt is the branch chamber quantity such as odd number more than or equal to three, can make the rotating accuracy of main shaft improve greatly, reaches 0.15 μ m even higher.
Description of drawings
Below in conjunction with accompanying drawing the present invention is done further explanation
Fig. 1 is the structural representation of existing quartering oil pocket;
Fig. 2 is the structural representation of existing six five equilibrium oil pockets;
Fig. 3 is a structural representation of the present invention;
Fig. 4 is the A-A cutaway view of Fig. 3;
Fig. 5 is the B-B cutaway view of Fig. 3;
Fig. 6 is an I place partial enlarged drawing among Fig. 3.
Among the figure:
Bearing shell or back bearing shell before the A-; The A1-main shaft, A2-gap, branch oil pockets such as A3-;
1-main shaft casing;
The 2-main shaft, the shaft shoulder before the 201-axially loaded annulus, 202-, the shaft shoulder behind the 203-;
Five equilibrium oil pocket before the bearing shell before the 3-, 301-;
Bearing shell behind the 4-waits branch oil pocket, 402-annular groove behind the 401-;
The 5-rear pressing cover, the 501-annular groove;
The 6-drive;
The 7-emery wheel.
The specific embodiment
Embodiment sees accompanying drawing 3,4,5,6; A kind of quiet dynamic pressure axle of five equilibrium oil pocket that is used for lathe is the unit, and lathe can be lathe, grinding machine etc., and what this embodiment adopted is grinding machine, but is not limited only to this; It comprises main shaft casing 1, main shaft 2, and main shaft 2 is installed in the main shaft casing, and stretch out at two ends; Rear-end of spindle is fixed with drive 6, is used for being connected with outside power source, drives main axis rotation; Because be to be example with the grinding machine in this embodiment, so, at the front end of main shaft emery wheel 7 is installed; If lathe then can mounting cutter,, do not detail at this because be the known technology in this area; Bearing shell 3 before on main shaft casing 1, being equipped with, back bearing shell 4 and rear pressing cover 5, preceding bearing shell 3, back bearing shell 4 can with main shaft casing one or split assembling, in this embodiment; Preceding bearing shell, back bearing shell are what to separate with the main shaft casing, and preceding bearing shell is fixedly connected with the main shaft casing, and then bearing shell is not; Therefore in the main shaft casing, be provided with one and be positioned at the collar of bearing shell front end face afterwards, prevent that it from moving, in order to reduce the axial runout of main shaft when rotating at a high speed; In main shaft 2 rear ends one axially loaded annulus 201 is arranged, axially loaded annulus 201 is molded directly within on the main shaft, with integrated spindle axis; Then the trailing flank of bearing shell 4 is provided with the annular groove 402 that matches with the leading flank of axially loaded annulus 201, and the leading flank of rear pressing cover 5 is provided with the annular groove 501 that matches with the trailing flank of said axially loaded annulus 201, reduces axial the beating of main shaft through letting two annular grooves be full of hydraulic oil.
And, reach the process time of accelerating main shaft in order to reduce the cost of machining spindle, and to increase work efficiency, main shaft 2 has the preceding shaft shoulder 202, the middle shaft shoulder 203 that matches with said preceding bearing shell 3, back bearing shell 4.Like this, in machining spindle, only need the preceding shaft shoulder 202, the middle shaft shoulder 203 high-precision processing be got final product, the remainder required precision is not high, and process velocity is fast.
Five equilibrium oil pocket 301 before preceding bearing shell 3 is provided with, back bearing shell 4 is provided with the back and waits branch oil pocket 401, and the quantity of branch oil pockets 401 such as preceding five equilibrium oil pocket 301 and/or said back is the odd number more than or equal to three; The selection of quantity confirms according to the diameter and the actual conditions of main shaft, and is general, through our actual detection, experiment; In the present technique field, it is 3,5 or 7 that preceding five equilibrium oil pocket 301 waits the quantity of branch oil pocket 401 with the back, wherein; With quantity is 5 the bests, and in this embodiment, preceding five equilibrium oil pocket 301 waits the quantity of branch oil pocket 401 to be 5 with the back; Certainly, also can be that the quantity of branch oil pocket 401 such as preceding five equilibrium oil pocket 301 or back are odd numbers such as 3,5,7; Just like this, effect is not best.
See accompanying drawing 1,2, the setting of traditional five equilibrium oil pocket that two kinds of representing of these two accompanying drawings are modal, range of application is the widest is respectively that the quartering and six five equilibrium oil pockets are provided with figure; Among the figure; What A represented is preceding bearing shell or back bearing shell, and what the main shaft of the lathe that A1 representes, A2 were represented is the normal clearance between main shaft and preceding bearing shell or the back bearing shell; What A3 represented is exactly the five equilibrium oil pocket; The groove of bearing shell or back inner surface of bearing bush before just being opened in, can run through whole before bearing shell or back bearing shell length direction, can not run through yet.Main shaft is no matter adopt the machine tooling of which kind of precision to come out; Its cross section in fact all is an ellipse; Same, the endoporus cross section of preceding bearing shell or back bearing shell also is oval, Fig. 1, Fig. 2 understand in order to show convenient and to be convenient to; The ovality of the endoporus of main shaft and preceding bearing shell or back bearing shell is amplified, but this does not represent actual size.When present axle is cell operation; Be to inject hydraulic oil; Hydraulic oil forms oil film between main shaft and preceding bearing shell, back bearing shell; Make main shaft be in liquid bearing state,, on preceding bearing shell, back bearing shell, all be provided with four or six five equilibrium oil pockets in order to reduce the circular runout that main shaft produces when rotating at a high speed.See Fig. 1, as can be seen from the figure, five equilibrium oil pocket A3 is four; Main axis cross section is oval, and corresponding two the five equilibrium oil pockets of two major axis of its cross section, corresponding two the five equilibrium oil pockets of minor axis are because the five equilibrium oil pocket is the groove of beginning on preceding bearing shell, back bearing shell endoporus; So; Two of two major axis with and branch oil pocket such as corresponding between the gap, be greater than the gap A2 between normal condition lower main axis and preceding bearing shell, the back bearing shell endoporus, same; Two minor axises with and its two corresponding five equilibrium oil pockets between the gap, also be greater than the gap A2's between normal condition lower main axis and preceding bearing shell, the back bearing shell endoporus.
Like this, when main axis rotation to two major axis, when two minor axises are corresponding with four five equilibrium oil pocket positions, can cause small beating of main shaft because the change in gap is big, though the variation in gap is very little very little; It is also very little very little to beat, and still, know; The speed of main axis rotation is 20000r/min, even higher, is that 24000r/min is an example with the speed of mainshaft; That is to say, in a second, main axis rotation 300 change; And in each changes, main shaft all can produce because of the variation in gap four radially small unexpectedly beating (in each changes, the major axis of main shaft, end axle have four times with four positions that the five equilibrium oil pocket is corresponding; Be exactly that four gaps change four circular runouts), change a second 300; Be exactly 1200 small circular runouts, and the processing of so corresponding general precision of beating is in the normal scope; And the reply spindle rotation accuracy is required less than the lathe of 0.15 μ m even 0.1 μ m, just too big, these errors of beating accumulative total make spindle rotation accuracy not reach requirement; See accompanying drawing 2; And it is six for existing five equilibrium oil pocket A3; Main axis cross section is oval, and two major axis of its cross section corresponding two five equilibrium oil pockets, minor axises then do not have corresponding five equilibrium oil pocket, so; Two of two major axis with and branch oil pocket such as corresponding between the gap, be greater than the gap A2's between normal condition lower main axis and preceding bearing shell, the back bearing shell endoporus.
Like this, when main axis rotation to two major axis is corresponding with two five equilibrium oil pocket positions, can cause small beating of main shaft because the change in gap is big, though the variation in gap is very little very little; It is also very little very little to beat, but will know that the speed of main axis rotation is 20000r/min, even higher; With the speed of mainshaft is that 24000r/min is an example, that is to say, in a second, main axis rotation 300 change; And in each changes, main shaft all can produce because of the variation in gap six radially small unexpectedly beating (in each changes, the major axis of main shaft have six times with two positions that the five equilibrium oil pocket is corresponding; Be exactly that six gaps change, beat for six times), change seconds 300; Be exactly 1800 small circular runouts, and the processing of the corresponding general precision of such circular runout is in the normal scope; And the reply spindle rotation accuracy is required less than the lathe of 0.15 μ m even 0.1 μ m, just too big, these errors of beating accumulative total just make that spindle rotation accuracy does not reach requirement.
And axle of the present invention is the unit, sees accompanying drawing 4,5; Branch oil pocket 401 quantity such as preceding five equilibrium oil pocket 301, back all are 5, are odd numbers.Below before five equilibrium oil pocket 301 be example, time the present invention is detailed how improves spindle rotation accuracy.Because preceding five equilibrium oil pocket 301 is to be distributed on the preceding bearing shell, can know that so the major axis of main shaft or the corresponding preceding five equilibrium oil pocket 301 of end axle can only be one, rather than such to four, six five equilibrium oil pockets; Corresponding all is two, so in theory, the variation in its gap has only the former 1/2, and the main shaft circular runout that produces therefrom in theory also has only the former 1/2; With the speed of mainshaft is that 24000r/min is an example, in a second, main axis rotation 300 change; And in each commentaries on classics, main shaft all can produce five radially small unexpectedly beating because of the variation in gap, and (in each commentaries on classics, the major axis of main shaft or end axle have the position corresponding with the five equilibrium oil pocket five times; Be exactly that five gaps change five circular runouts), change a second 300; Be exactly 1500 small circular runouts, though compare with 1200 times of quartering oil pocket, quantity is to have increased; But the each small radial beat eccentricity of this embodiment only is 1/2 of a quartering oil pocket, so the axle of comparing four, six five equilibrium oil pockets is the unit; The axle of this embodiment is the unit, and the rotating accuracy of its main shaft improves greatly, can reach 0.15 μ m even more than the 0.1 μ m; And this spindle rotation accuracy waits branch oil pocket quantity to realize through change, and is with low cost, simple in structure.
The above is merely preferred embodiment of the present invention, is not to be used to limit protection scope of the present invention.All within spirit of the present invention and principle, any modification of being done, be equal to replacement and improvement etc., all should be included within protection scope of the present invention.
Claims (8)
1. the quiet dynamic pressure axle of five equilibrium oil pocket that is used for lathe is the unit; Comprise main shaft casing (1), main shaft (2); Preceding bearing shell (3), back bearing shell (4) are installed on the described main shaft casing (1); Five equilibrium oil pocket (301) before bearing shell (3) is provided with before said, said back bearing shell (4) is provided with the back and waits branch oil pocket (401), it is characterized in that: the quantity of branch oil pocket (401) such as five equilibrium oil pocket (301) and/or said back is the odd number more than or equal to three before said.
2. a kind of quiet dynamic pressure axle of five equilibrium oil pocket that is used for lathe according to claim 1 is the unit, it is characterized in that: the quantity of branch oil pocket (401) such as five equilibrium oil pocket (301) and/or said back is 3,5,7 before said.
3. a kind of quiet dynamic pressure axle of five equilibrium oil pocket that is used for lathe according to claim 1 and 2 is the unit, it is characterized in that: the quantity of branch oil pocket (401) such as five equilibrium oil pocket (301) and/or said back is 5 before said.
4. a kind of quiet dynamic pressure axle of five equilibrium oil pocket that is used for lathe according to claim 1 is the unit, and it is characterized in that: the rear end of described main shaft (2) is equipped with drive (6).
5. a kind of quiet dynamic pressure axle of five equilibrium oil pocket that is used for lathe according to claim 1 is the unit; It is characterized in that: there is an axially loaded annulus (201) said main shaft (2) rear end; The trailing flank of said back bearing shell (4) is provided with the annular groove (402) that matches with the leading flank of said axially loaded annulus (201); Said main shaft casing (1) rear end is fixed with rear pressing cover (5), and the leading flank of said rear pressing cover (5) is provided with the annular groove (501) that matches with the trailing flank of said axially loaded annulus (201).
6. a kind of quiet dynamic pressure axle of five equilibrium oil pocket that is used for lathe according to claim 1 is the unit, it is characterized in that: bearing shell (3) and/or back bearing shell (4) the one-body molded or split assembling with described main shaft casing (1) before said.
7. a kind of quiet dynamic pressure axle of five equilibrium oil pocket that is used for lathe according to claim 1 is the unit, it is characterized in that: described main shaft (2) has the preceding shaft shoulder (202), the middle shaft shoulder (203) that matches with said preceding bearing shell (3), back bearing shell (4).
8. a kind of quiet dynamic pressure axle of five equilibrium oil pocket that is used for lathe according to claim 1 is the unit, and it is characterized in that: described lathe is lathe or grinding machine.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201210008607.5A CN102554278B (en) | 2012-01-12 | 2012-01-12 | Evenly divided oil cavity static-dynamic pressure shafting unit for machine tool |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201210008607.5A CN102554278B (en) | 2012-01-12 | 2012-01-12 | Evenly divided oil cavity static-dynamic pressure shafting unit for machine tool |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN102554278A true CN102554278A (en) | 2012-07-11 |
| CN102554278B CN102554278B (en) | 2014-10-22 |
Family
ID=46401642
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201210008607.5A Active CN102554278B (en) | 2012-01-12 | 2012-01-12 | Evenly divided oil cavity static-dynamic pressure shafting unit for machine tool |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN102554278B (en) |
Citations (12)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| SU1202722A1 (en) * | 1984-03-12 | 1986-01-07 | Проектно-конструкторский технологический институт машиностроения | Spindle assembly |
| CN2051693U (en) * | 1988-12-23 | 1990-01-24 | 长春第一机床厂 | Double cone dynamic bearing |
| CN2671722Y (en) * | 2004-02-19 | 2005-01-19 | 应圣平 | Support mechanism of common high speed digital control lathe main shaft |
| CN2675340Y (en) * | 2004-02-11 | 2005-02-02 | 无锡开源机床集团有限公司 | Grinding wheel spindle structure of centerless grinding machine |
| CN2696746Y (en) * | 2004-04-23 | 2005-05-04 | 济南二机床集团有限公司 | Heavy load beared static pressure spindle bearing device |
| CN2928385Y (en) * | 2006-06-10 | 2007-08-01 | 上海机床厂有限公司 | Dynmaic and static pressure bearing grinder emergy wheel frame of axial reciprocating shivering |
| JP2009028803A (en) * | 2007-07-24 | 2009-02-12 | Nsk Ltd | Main spindle apparatus |
| CN201295774Y (en) * | 2008-11-11 | 2009-08-26 | 江苏牛牌精密机床有限公司 | Machine tool principal axis |
| JP2009190100A (en) * | 2008-02-13 | 2009-08-27 | Minoru Kanematsu | Tool spindle and chuck spindle with component commonality |
| CN201320706Y (en) * | 2008-11-07 | 2009-10-07 | 威海三韩精密机械有限公司 | Bearing for centerless grinder |
| CN201711544U (en) * | 2010-07-08 | 2011-01-19 | 宁波恒力汽配轴承有限公司 | Front end positioning structure of spindle of numerical control lathe headstock |
| CN202461543U (en) * | 2012-01-12 | 2012-10-03 | 浙江辛子精工机械股份有限公司 | Equant oil chamber static-dynamical pressure shafting unit for machine tool |
-
2012
- 2012-01-12 CN CN201210008607.5A patent/CN102554278B/en active Active
Patent Citations (12)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| SU1202722A1 (en) * | 1984-03-12 | 1986-01-07 | Проектно-конструкторский технологический институт машиностроения | Spindle assembly |
| CN2051693U (en) * | 1988-12-23 | 1990-01-24 | 长春第一机床厂 | Double cone dynamic bearing |
| CN2675340Y (en) * | 2004-02-11 | 2005-02-02 | 无锡开源机床集团有限公司 | Grinding wheel spindle structure of centerless grinding machine |
| CN2671722Y (en) * | 2004-02-19 | 2005-01-19 | 应圣平 | Support mechanism of common high speed digital control lathe main shaft |
| CN2696746Y (en) * | 2004-04-23 | 2005-05-04 | 济南二机床集团有限公司 | Heavy load beared static pressure spindle bearing device |
| CN2928385Y (en) * | 2006-06-10 | 2007-08-01 | 上海机床厂有限公司 | Dynmaic and static pressure bearing grinder emergy wheel frame of axial reciprocating shivering |
| JP2009028803A (en) * | 2007-07-24 | 2009-02-12 | Nsk Ltd | Main spindle apparatus |
| JP2009190100A (en) * | 2008-02-13 | 2009-08-27 | Minoru Kanematsu | Tool spindle and chuck spindle with component commonality |
| CN201320706Y (en) * | 2008-11-07 | 2009-10-07 | 威海三韩精密机械有限公司 | Bearing for centerless grinder |
| CN201295774Y (en) * | 2008-11-11 | 2009-08-26 | 江苏牛牌精密机床有限公司 | Machine tool principal axis |
| CN201711544U (en) * | 2010-07-08 | 2011-01-19 | 宁波恒力汽配轴承有限公司 | Front end positioning structure of spindle of numerical control lathe headstock |
| CN202461543U (en) * | 2012-01-12 | 2012-10-03 | 浙江辛子精工机械股份有限公司 | Equant oil chamber static-dynamical pressure shafting unit for machine tool |
Also Published As
| Publication number | Publication date |
|---|---|
| CN102554278B (en) | 2014-10-22 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN103286678B (en) | A kind of Multifunction internal formula dynamic/static piezoelectric main shaft for efficient high-speed precision machine tool | |
| CN105014480A (en) | Numerical control rotation working table | |
| CN104190959B (en) | There is the Aerostatic Spindle of turn error monitoring function | |
| CN207026496U (en) | A kind of power spindle head device processed with milling or mill for boring | |
| CN202317133U (en) | Boring lathe used for machining curve shaft holes of engine cylinder body | |
| CN110732887A (en) | ultra-precision hydrostatic pressure turntable | |
| CN104014823A (en) | Electric spindle of bidirectional herringbone groove hydrodynamic/hydrostatic integrated gas bearing support | |
| CN112108659A (en) | Electric spindle pre-tightening device for gantry machining center | |
| CN101123376A (en) | A high-speed woodworker power principle axis | |
| CN202461543U (en) | Equant oil chamber static-dynamical pressure shafting unit for machine tool | |
| CN202343961U (en) | Electric main shaft for lathe | |
| CN203304574U (en) | Multifunctional built-in dynamic and static pressure electric spindle for efficient high-speed precision machine tool | |
| CN208613762U (en) | A kind of microflute hole dynamic and static pressure air-floating main shaft | |
| CN107921547B (en) | Compound ball bearing and main shaft device and lathe | |
| CN202021707U (en) | Double-cutter head horizontal ultra-precision liquid static pressure electric spindle system | |
| CN103567861B (en) | Vertical grinding machine with double end faces high-precision grinder main shaft | |
| CN102528631B (en) | Floating centrifugal deep-hole polishing device | |
| CN102554278B (en) | Evenly divided oil cavity static-dynamic pressure shafting unit for machine tool | |
| CN101633120B (en) | Double-division auxiliary static-pressure bearing and turning worktable of machine tool | |
| CN202447679U (en) | Unloading type static and dynamic pressure shafting unit for machine tools | |
| CN102825268A (en) | Transmission main shaft structure of numerical control drilling and milling machine | |
| CN103100729A (en) | High-speed electric main shaft device using sliding bearing and rolling bearing for composite support | |
| CN104167889A (en) | Adjusting method of rotor mass center | |
| CN102581317A (en) | Unloading type static-dynamic pressure shafting unit for machine tool | |
| CN204052940U (en) | A kind of the Aerostatic Spindle with turn error monitoring function |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| TR01 | Transfer of patent right |
Effective date of registration: 20170310 Address after: Economic and Technological Development Zone, Zhejiang province Huzhou children 313000 Hong Kong Road No. 1958 Patentee after: Huzhou three lines Bearing Co., Ltd. Address before: 313000 Zhejiang Province Yang Huzhou City Economic Development Zone Town Fang Road No. 298 Patentee before: Zhejiang Eight Plus One Co., Ltd. |
|
| TR01 | Transfer of patent right |