CN101774031B - Ultrahigh speed precise pneumatic micro spindle unit - Google Patents
Ultrahigh speed precise pneumatic micro spindle unit Download PDFInfo
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- CN101774031B CN101774031B CN2010101169818A CN201010116981A CN101774031B CN 101774031 B CN101774031 B CN 101774031B CN 2010101169818 A CN2010101169818 A CN 2010101169818A CN 201010116981 A CN201010116981 A CN 201010116981A CN 101774031 B CN101774031 B CN 101774031B
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- gas bearing
- spindle
- ultrahigh speed
- spindle unit
- pneumatic micro
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Abstract
The invention relates to an ultrahigh speed precise pneumatic micro spindle unit which comprises a spindle, a turbine, a front end gas bearing, a rear end gas bearing, a box body, a micro elastic coupling, a shape memory alloy jacket, an execution shaft and an execution shaft gas bearing, wherein the turbine is arranged on the spindle and supported and arranged in a shaft hole of the box body through the front end gas bearing and the rear end gas bearing; the front end of the spindle is provided with an axial hole and the micro elastic coupling; the execution shaft is supported and arranged in the shaft hole of the box body through the execution shaft gas bearing, and one end of the execution shaft is arranged in the axial hole of the spindle; and the shape memory alloy jacket is arranged on the outer circumference at the front end of the spindle and clamps the execution shaft on the spindle. The invention has reasonable structure, simple manufacture process, high rotating speed and small run-out error, is suitable for industrial production and can be used as a micro spindle of a fine cutting and processing machine tool and a micro spindle unit of other electromechanical equipment doing high and ultrahigh speed and high precision rotary motions or hand tool machine.
Description
Technical field
The invention discloses a kind of ultrahigh speed precise pneumatic micro spindle unit, belong to machinery manufacturing technology field.
Background technology
The miniaturization of part and the high precision int of size have proposed more and more higher requirement to its process equipment.And the maximum speed that is used for the little electric main shaft on miniature lathe or the hand tool at present generally is no more than 300000rpm, and along with the raising of rotating speed, caloric value constantly increases, and causes spindle deformation, has a strong impact on the crudy of part.In addition, existing pneumatic micro spindle rotating speed is not high, and a little less than the bearing capacity, rigidity is low, and runout error is big, is difficult to satisfy micro part carried out fine machining requirements such as high speed/ultrahigh speed is littlely milled, little brill, little mill.
Summary of the invention
The objective of the invention is to overcome existing deficiency and a kind of rational in infrastructure, manufacturing process is simple, rotating speed is high, runout error is little ultrahigh speed precise pneumatic micro spindle unit is provided, to satisfy the demand of manufacturing industry ultrahigh rotating speed, the low little main shaft of runout error.
For achieving the above object, the present invention adopts following technical scheme:
Ultrahigh speed precise pneumatic micro spindle unit, comprise: main shaft, turbine, front end gas bearing, rear end gas bearing, casing, miniature elastic coupling, marmem chuck, execution axle, an execution axle gas bearing, described front-end of spindle is installed in the axis hole of described casing by the supporting of described rear end gas bearing by described front end gas bearing, rear end; Be provided with turbine room between described front end gas bearing and described rear end gas bearing, described turbine is arranged on the described main shaft and is in the described turbine room; Described front end gas bearing, described rear end gas bearing are made up of at least one pressurized air journal bearing and a pressurized air thrust bearing respectively; Described front-end of spindle is provided with axial hole and miniature elastic coupling; Described execution axle is installed in the axis hole of described casing by the supporting of described execution axle gas bearing, and the one end is installed in the axial hole of described front-end of spindle setting; Described marmem chuck is installed on the excircle of described front-end of spindle, and described execution axle clamp is held in the described main shaft; Described execution axle gas bearing is made up of at least one pressurized air journal bearing.
Among the present invention, described main shaft and turbine are made as one.
Among the present invention, described rear-end of spindle face is arranged with two holes or groove along described main-shaft axis.
Among the present invention, described casing is equipped with bonnet, on the described bonnet current vortex sensor is installed, and its installation site is corresponding with hole or groove position that described rear-end of spindle face is provided with.
Among the present invention, be respectively equipped with described front end gas bearing, rear end gas bearing on the described casing, carry out the air inlet of axle gas bearing and the air inlet of described turbine room.
Among the present invention, the bonnet of described casing is provided with the air discharge duct of described turbine room.
Among the present invention, be respectively equipped with the exhaust outlet of described front end gas bearing, rear end gas bearing, execution axle gas bearing on the described casing.
Among the present invention, an end of described main shaft is equipped with and emits lid, and described emitting between lid and the described execution axle gas bearing forms a cavity, and described marmem chuck is in the described cavity.
Among the present invention, between described execution axle and the described execution axle gas bearing lining is installed.
Among the present invention, described miniature elastic coupling is provided with at least one group of little grooving, and described one group of little grooving is made up of two pairs of orthogonal little groovings, described each to little grooving perpendicular to described shaft coupling axis and be symmetricly set on the described shaft coupling; Described shaft coupling center is provided with axial hole.
The present invention utilizes the turbine room air inlet, the air discharge duct that are provided with on the casing to realize the high-speed driving to turbine spindle, rotating speed height owing to adopt said structure; The bearing pair that utilizes pressurized air journal bearing and pressurized air thrust bearing to constitute supports the location respectively at front-end of spindle, rear-end of spindle to main shaft, frictional dissipation and runout error in the time of can effectively reducing described main shaft high speed rotating; Utilize the foozle, alignment error, runout error of the miniature elastic coupling compensation turbine spindle that the turbine spindle front end is provided with etc., make turbine spindle realize that zero error transmits rotating speed and moment of torsion; Utilize the supporting of pressurized air journal bearing to carry out axle and can effectively improve the rotating accuracy of carrying out axle, satisfy the requirement of high rotating accuracy under the micro spindle unit ultrahigh rotating speed; Utilizing marmem will carry out axle clamp is held in the main shaft, and in carrying out the axle gas bearing mounting bush, thereby can emit the temperature in the lid to change unclamping and clamped condition of marmem chuck by change easily, be convenient to carrying out installation, maintenance, the replacing of axle; Two holes that utilization is installed in that current vortex sensor on the bonnet and rear-end of spindle face be provided with or groove are realized the real-time measurement to the speed of mainshaft.
In sum, the present invention is rational in infrastructure, and manufacturing process is simple, the rotating speed height, and runout error is little, and is safe and reliable, and carrying out axle as this is min-cutter, just is particularly suitable for fine machining such as the high speed/ultrahigh speed of micro part is littlely milled, little brill, little mill; Be suitable for suitability for industrialized production, can be used as little main shaft of fine machining lathe and other makes high speed and ultrahigh speed, the electromechanical equipment of high-precision rotary motion or the micro spindle unit of hand tool.
Description of drawings
Accompanying drawing 1 is the main cutaway view of the embodiment of the invention.
Accompanying drawing 2 is A-A cutaway views of Fig. 1.
Accompanying drawing 3 is miniature elastic shaft coupling structural representation among the present invention.
In the accompanying drawing: 1--current vortex sensor, 2--bonnet, 3--rear end gas bearing, the 4--casing, 5--turbine room, 6--gas bearing air inlet, 7--front end gas bearing, 8--front end axial hole, 9--cap, the 10--baffle plate, 11--carries out axle gas bearing lining, and 12--carries out axle, 13--marmem chuck, 14--carries out the axle gas bearing, the 15--transection slot, 16--slitting slot, 17 shaft coupling axial holes, the 18--turbine, the 19--main shaft, 20--hole or groove, 21--air discharge duct, 22--turbine room air inlet, the 23--miniature elastic coupling.
The specific embodiment
Below in conjunction with embodiment and accompanying drawing the present invention is elaborated:
Referring to accompanying drawing 1,2,3, ultrahigh speed precise pneumatic micro spindle unit of the present invention comprises:
The 1--current vortex sensor, the 2--bonnet, 3--rear end gas bearing, 4--casing, the 5--turbine room, 6--gas bearing air inlet, 7--front end gas bearing, 9--cap, the 10--baffle plate, 11--carries out axle gas bearing lining, and 12--carries out axle, 13--marmem chuck, 14--carries out the axle gas bearing, the 18--turbine, 19--main shaft, 20--hole or groove, the 21--air discharge duct, 22--turbine room air inlet, the 23--miniature elastic coupling, described main shaft 19 rear end faces are arranged with two holes or groove 20 along described main shaft 19 axis; On the described bonnet 2 current vortex sensor 1 is installed, two holes or groove 20 positions that its installation site and described main shaft 19 rear end faces are provided with are corresponding; Be respectively equipped with the air inlet 6 and the exhaust outlet of described front end gas bearing 7, rear end gas bearing 3, execution axle gas bearing 14 on the described casing 4; Described main shaft 19 front ends are installed in the axis hole of described casing 4 by 3 supportings of described rear end gas bearing by described front end gas bearing 7, rear end; Described casing 4 is equipped with bonnet 2, is used to install current vortex sensor 1; Be provided with described turbine room 5 between described front end gas bearing 7 and described rear end gas bearing 3, described turbine 18 is arranged on the described main shaft 19 and is in the described turbine room 5; Described casing 4 is provided with the air inlet 22 of described turbine room 5, is provided with the air discharge duct 21 of described turbine room 5 on described bonnet 2; Described front end gas bearing 7, described rear end gas bearing 3 are made up of a pressurized air journal bearing and a pressurized air thrust bearing respectively; Described main shaft 19 front ends are provided with miniature elastic coupling 23, axial hole 8; Described execution axle 12 is installed in the axis hole of described casing 4 by described execution axle gas bearing 14, and the one end is installed in the axial hole 8 of described main shaft 19 front ends setting, between described execution axle 12 and described execution axle gas bearing 14 lining 11 is installed; Described marmem chuck 13 is installed on the excircle of described main shaft 19 front ends, and described execution axle 12 is clamped in the described main shaft 19; One end of described main shaft 19 is equipped with to emit and covers 9, described emit cover 9 and described execution axle gas bearing 12 between form a cavity, described marmem chuck 13 is in the described cavity; Described execution axle gas bearing 14 is made up of a pressurized air journal bearing.
Described miniature elastic coupling 23 is provided with at least one group of little grooving, described one group of little grooving is made up of two pairs of orthogonal little groovings 15,16, described each to little grooving 15,16 perpendicular to described miniature elastic coupling 23 axis and be symmetricly set on the described miniature elastic coupling 23; Described miniature elastic coupling 23 centers are provided with axial hole 17.
In the present embodiment, described main shaft 19 is made as one with turbine 18.
Operation principle of the present invention is sketched in down: source of the gas enters rear end gas bearing 3 drive shaft rear end pressurized air journal bearings and rear-end of spindle pressurized air thrust bearing and front-end of spindle pressurized air journal bearing and pressurized air thrust bearing through air inlet 6 and main shaft is supported the location, frictional dissipation and runout error in the time of can effectively reducing the main shaft high speed rotating; Source of the gas enters turbine room 5 through 2 air inlets 22, and promote turbine spindle and rotate at a high speed, and then the cutter of the central axial bore clamping of drive shaft front end setting, realize processing to workpiece.The present invention adopts miniature elastic coupling, and the foozle of compensation turbine spindle, alignment error, runout error etc. make turbine spindle transmit rotating speed and moment of torsion in zero error ground; Axle be will carry out and gas bearing supporting, rotating accuracy height adopted; Adopt the clamping of marmem chuck to carry out the tip of the axis, and in carrying out the axle gas bearing, increased lining, realized carrying out the replaceable requirement of axle.
Claims (10)
1. ultrahigh speed precise pneumatic micro spindle unit, comprise: main shaft, turbine, front end gas bearing, rear end gas bearing, casing, miniature elastic coupling, marmem chuck, execution axle, an execution axle gas bearing is characterized in that: described front-end of spindle is installed in the axis hole of described casing by the supporting of described rear end gas bearing by described front end gas bearing, rear end; Be provided with turbine room between described front end gas bearing and rear end gas bearing, described turbine is arranged on the described main shaft and is in the described turbine room; Described front end gas bearing, described rear end gas bearing are made up of at least one pressurized air journal bearing and a pressurized air thrust bearing respectively; Described front-end of spindle is provided with axial hole and miniature elastic coupling; Described execution axle is installed in the axis hole of described casing by the supporting of described execution axle gas bearing, and the one end is installed in the axial hole of described front-end of spindle setting; Described marmem chuck is installed on the excircle of described front-end of spindle, and described execution axle clamp is held in the described main shaft; Described execution axle gas bearing is made up of at least one pressurized air journal bearing.
2. ultrahigh speed precise pneumatic micro spindle unit according to claim 1 is characterized in that: described main shaft and turbine are made one.
3. ultrahigh speed precise pneumatic micro spindle unit according to claim 2 is characterized in that: described rear-end of spindle face is arranged with two holes or groove along described main-shaft axis.
4. ultrahigh speed precise pneumatic micro spindle unit according to claim 3 is characterized in that: described casing is equipped with bonnet, on the described bonnet current vortex sensor is installed, and its installation site is corresponding with hole or groove position that described rear-end of spindle face is provided with.
5. ultrahigh speed precise pneumatic micro spindle unit according to claim 4 is characterized in that: be respectively equipped with described front end gas bearing, rear end gas bearing on the described casing, carry out the air inlet of axle gas bearing and the air inlet of described turbine room.
6. ultrahigh speed precise pneumatic micro spindle unit according to claim 5 is characterized in that: the bonnet of described casing is provided with the air discharge duct of described turbine room.
7. ultrahigh speed precise pneumatic micro spindle unit according to claim 6 is characterized in that: the exhaust outlet that is respectively equipped with described front end gas bearing, rear end gas bearing, execution axle gas bearing on the described casing.
8. ultrahigh speed precise pneumatic micro spindle unit according to claim 7, it is characterized in that: an end of described main shaft is equipped with and emits lid, described emitting between lid and the described execution axle gas bearing forms a cavity, and described marmem chuck is in the described cavity.
9. ultrahigh speed precise pneumatic micro spindle unit according to claim 8 is characterized in that: between described execution axle and the described execution axle gas bearing lining is installed.
10. ultrahigh speed precise pneumatic micro spindle unit according to claim 9, it is characterized in that: described miniature elastic coupling is provided with at least one group of little grooving, described each organize little grooving and form by two pairs of orthogonal little groovings, described each to little grooving perpendicular to described shaft coupling axis and be symmetricly set on the described shaft coupling; Described shaft coupling center is provided with axial hole.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010101169818A CN101774031B (en) | 2010-03-03 | 2010-03-03 | Ultrahigh speed precise pneumatic micro spindle unit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010101169818A CN101774031B (en) | 2010-03-03 | 2010-03-03 | Ultrahigh speed precise pneumatic micro spindle unit |
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| Publication Number | Publication Date |
|---|---|
| CN101774031A CN101774031A (en) | 2010-07-14 |
| CN101774031B true CN101774031B (en) | 2011-11-30 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2010101169818A Expired - Fee Related CN101774031B (en) | 2010-03-03 | 2010-03-03 | Ultrahigh speed precise pneumatic micro spindle unit |
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Families Citing this family (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102615297B (en) * | 2012-04-18 | 2014-02-26 | 清华大学深圳研究生院 | Turbine pneumatic main shaft |
| CN103056397B (en) * | 2012-12-31 | 2014-12-17 | 哈尔滨工业大学 | Large-diameter ultra-precise air static pressure rotating shafting |
| CN103302316B (en) * | 2013-04-28 | 2015-09-23 | 湖南大学 | High speed and precision pneumatic micro spindle |
| CN106424771B (en) * | 2016-11-30 | 2018-03-13 | 湖南大学 | A kind of micro- main shaft of Fine Machinery processing |
| CN110202394B (en) * | 2019-04-19 | 2021-03-09 | 广州市昊志机电股份有限公司 | Ultra-precise air floatation motorized spindle |
Family Cites Families (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| TW200402344A (en) * | 2002-08-09 | 2004-02-16 | Hitachi Via Mechanics Ltd | Spindle device |
| JP4264731B2 (en) * | 2004-01-30 | 2009-05-20 | 株式会社安川電機 | Hydrostatic air bearing spindle |
| JP4912120B2 (en) * | 2005-11-22 | 2012-04-11 | 日立ビアメカニクス株式会社 | Spindle device |
| CN200991756Y (en) * | 2006-12-18 | 2007-12-19 | 广州市大族高精电机有限公司 | Main axle device |
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2010
- 2010-03-03 CN CN2010101169818A patent/CN101774031B/en not_active Expired - Fee Related
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| CN101774031A (en) | 2010-07-14 |
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