CN106424771A - Micro spindle for fine machining - Google Patents
Micro spindle for fine machining Download PDFInfo
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- CN106424771A CN106424771A CN201611082459.6A CN201611082459A CN106424771A CN 106424771 A CN106424771 A CN 106424771A CN 201611082459 A CN201611082459 A CN 201611082459A CN 106424771 A CN106424771 A CN 106424771A
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23Q—DETAILS, COMPONENTS, OR ACCESSORIES FOR MACHINE TOOLS, e.g. ARRANGEMENTS FOR COPYING OR CONTROLLING; MACHINE TOOLS IN GENERAL CHARACTERISED BY THE CONSTRUCTION OF PARTICULAR DETAILS OR COMPONENTS; COMBINATIONS OR ASSOCIATIONS OF METAL-WORKING MACHINES, NOT DIRECTED TO A PARTICULAR RESULT
- B23Q1/00—Members which are comprised in the general build-up of a form of machine, particularly relatively large fixed members
- B23Q1/70—Stationary or movable members for carrying working-spindles for attachment of tools or work
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- Mechanical Engineering (AREA)
- Magnetic Bearings And Hydrostatic Bearings (AREA)
Abstract
The invention discloses a micro spindle for fine machining. A turbine 19 is arranged in the middle of a spindle rotor 16 and is driven by a high-speed airflow provided by a turbine nozzle 18, the spindle rotor 16 adopts a front-end porous static pressure gas radial bearing 13 and a rear-end porous static pressure gas radial bearing 14 radial support, a baffle 21 is arranged at the rear end of the spindle rotor 16, a front-end porous static pressure gas thrust bearing 3, a rear-end porous static pressure gas thrust bearing 2 axial support, a rear-end bearing supporting part 20, the turbine nozzle 18 and a front-end bearing supporting part 17 are sequentially installed in a box body 1 and are fixed through an installing plate 11, and a micro cutter 15 is clamped at the front end of the spindle rotor 16 through a thermal expansion and cold contraction effect. The micro spindle is reasonable in design, simple in structure, small in size, convenient to manufacture, high in rotating speed and small in bounce error, can serve as the micro spindle for a micro machine tool for fine machining and can be also used as the micro spindle for other high-speed high-precision micro electro mechanical devices or manual tool machines and the like.
Description
Technical field
The present invention relates to a kind of main shaft, more particularly to a kind of Fine Machinery processing ultrahigh speed precise pneumatic micro spindle,
Belong to machine-building equipment field.
Background technology
The high precision int of the miniaturization of part and size proposes higher and higher requirement to its process equipment.Micro- main shaft is made
For the critical component of microcomputer bed, directly determine the Fine Machinery process technologies such as performance and the fine grinding of micro-cutting of microcomputer bed
Development and application.Existing micro- main shaft is divided into micro- electro spindle and two kinds of micro- pneumatic main shaft, is primarily present three below aspect problem：
One is complex structure, and volume is largerLimit the miniaturization of microcomputer bed.Meeting microcomputer bed will
Ask,Draw ratio is not more than 3:1；Two is that loss by motor in micro- electro spindle is sent out
Heat and using rolling bearing frictional heating or using hole throttle type hydrostatic gas-lubricated bearing rigidity low problem impact, turn
Speed is relatively low (mostly<Below 200000r/min), not only have impact on Fine Machinery working (machining) efficiency and crudy, and exacerbate micro-
The abrasion of cutter and more slip velocity degree.The micro-cutting fine grinding external diameter of micro- cutter typically several microns to hundreds of micron it
Between, 500000r/min should be exceeded according to the rotating speed that the micro-cutting speed that material property is recommended can be derived from micro- main shaft；Three
It is that existing micro- main shaft adopts the micro- cutter of collet clamping, manufacture alignment error of collet etc. can be directly delivered to cutter
On, the runout error of cutter is significantly increased.If runout error during micro- main shaft ultrahigh speed rotation is up to 10 μm, greatly exceed micro-
The Fine Machinery processing thickness of meter level.Therefore actual Fine Machinery processing in order to avoid micro- main shaft big runout error often
Micro- speed of mainshaft can be limited.
If only weighed from volume size, micro- main shaft is ratio conventional master spindle small volume.But in fact, with volume
Significantly reduce, the continuous improvement of rotating speed, its thermal deformation, rigidity, frequency, amplitude etc. and conventional master spindle exist very big different.For
This, it is necessary to start with from innovation structure design, develops the micro- main shaft of ultra-speed precise for Fine Machinery processing.And micro- electro spindle
Complex structure, and limited by radiating condition, rotating speed is relatively low；Using air stream drives and the air floatation turbine that supports declines main shaft due to gas
The friction factor of body is low, temperature rise is little, flow velocity is high, can reach very high rotating speed, theoretically disclosure satisfy that high speed micro-cutting
Processing request.Inventor herein has designed two new ultrahigh speed precise pneumatic micro spindles (see patent：
ZL201010116981.8, ZL201310157777.4), but volume is larger, and rotating speed can't fully meet requirement.For this reason,
Design the new micro- main shaft for Fine Machinery processing, its external structure<Diameter 30mm × long 60mm, maximum speed exceedes
400000r/min.
Content of the invention
The technical problem to be solved is that a kind of rotating speed of offer is high, runout error is little and simple and compact for structure, system
Make conveniently, for the micro- main shaft of ultra-speed precise of the Fine Machineries such as minuteness milling, fine drilling, fine grinding processing.
In order to solve the above problems, the present invention provide Fine Machinery processing use micro- main shaft, including casing, equal pressing plate, after
End bearing supporting member, turbine nozzle, front end bearing support, spindle rotor, micro- cutter and installing plate, described turbine is directly in institute
State and process in the middle of spindle rotor, the blade on described turbine is regular cylindrical face shape, and just to the aperture on turbine nozzle,
Described turbine nozzle is provided with two circle apertures in order to provide high velocity air drive shaft rotor high-speed rotation, described spindle rotor
Front and back ends are respectively adopted front end Porous pressurized air journal bearing, rear end Porous pressurized air journal bearing radial support
Install, described spindle rotor rear end is provided with baffle plate, and described baffle plate front and back ends are respectively adopted front end Porous pressurized air thrust
Axially supporting is installed for bearing, rear end Porous pressurized air thrust bearing, and described spindle rotor rear end is additionally provided with rear end bearing
In order to discharge air-flow, described front end Porous pressurized air journal bearing is arranged in the bearing support of front end exhaust duct, described
Front end bearing support circumference is evenly equipped with 4 front end air-flow air intake ducts, described rear end Porous pressurized air journal bearing and institute
State " L " shape that front end Porous pressurized air thrust bearing is formed integrally, and be arranged in rear end bearing supporting member, described rear end
Bearing support circumference is evenly equipped with 4 rear end air-flow air intake ducts, and described rear end Porous pressurized air thrust bearing passes through all to press
Plate provides air-flow, and described equal pressing plate, rear end Porous pressurized air thrust bearing are sequentially arranged at box back, described rear end axle
Hold supporting member, turbine nozzle, front end bearing support are sequentially arranged in casing, and by installing plate, screw fixed installation, institute
State casing and be provided with rear end Porous pressurized air thrust bearing air supply opening and corresponding thrust bearing air intake duct, thrust bearing row
Air flue, thrust bearing air vent, rear end Porous hydrostatic gas-lubricated bearing air supply opening, turbine rear end air vent, nozzle air supply opening, whirlpool
Wheel front end air vent, front end Porous pressurized air journal bearing air supply opening, it is provided with axle at the axis of described spindle rotor front end
Xiang Kong, clamps micro- cutters such as micro- milling cutter, micro drill, micro- frotton or other microactuator by effect of expanding with heat and contract with cold, and axially
Hole depth is more than micro- knife handle length, thus scalable micro- cutter cantilevered length.
Described turbine nozzle is not limited to arrange two circle apertures, can arrange single-turn or multi-turn according to output speed, torque request
Aperture.
Described front end bearing support is not limited to uniform 4 front end air-flow air intake ducts, and described rear end bearing supporting member does not limit
In uniform 4 rear end air-flow air intake ducts, described equal pressing plate is also not necessarily limited to uniform 4 balancing orifices, can be uniformly arranged it as needed
The air intake duct of its quantity or balancing orifice.
Micro- main shaft is used in Fine Machinery processing using technique scheme, impacts whirlpool by the high velocity air that turbine nozzle provides
Wheel drive spindle rotor high-speed rotation, realizes micro- main shaft ultrahigh rotating speed performance；It is quiet that spindle rotor front and back ends are respectively adopted Porous
Pressure gas lubricated journal bearing supporting positioning, spindle rotor rear end is provided with baffle plate, and baffle plate front and back ends are respectively adopted Porous static pressure gas
Body thrust bearing supporting positioning, realizes the ultra-precise revolving of micro- main shaft；It is provided with axial hole at the axis of spindle rotor front end, pass through
Effect of expanding with heat and contract with cold clamps micro- cutter.
Micro- main shaft is used in Fine Machinery processing using technique scheme, compared with prior art its advantage and good effect
It is significant, major embodiment is in the following areas：
1. the nozzle arrangements of liang circle or multi-turn aperture.In the pneumatic microturbines of impact type, in order to obtain ultrahigh rotating speed, nozzle
In orifice size typically little.But orifice size is less, its impact forces is less.If little using conventional individual pen
Hole arrangement, by micro- main axle structure size limitation, its limited amount, thus results in the torque of microturbines generation and power relatively
Little it is difficult to meet Fine Machinery processing request.And just the week of turbo blade is being set up in nozzle with two circles or multi-turn aperture,
Can be multiplied nozzle orifice quantity, not only can achieve the ultrahigh rotating speed performance of pneumatic microturbines, and can effectively lift its turn
Square and power.
2. the integral structure of spindle rotor and turbine.After in existing rotating machinery, supporting rotor and turbine are much processing
It is assembled together, the manufacture of turbine is installed equal error and can be directly delivered on supporting rotor, exacerbates the imbalance of rotor.Especially
It is the micro- main shaft of ultra-speed precise, under macro-scale, the amount of unbalance of very little is possible to lead to very big runout error.And it is existing
Dynamic balancing technique also cannot solve the dynamic balance calibration that grade rotor hundreds of thousands turns, and machining accuracy therefore can only be relied on to protect
Card.And spindle rotor and turbine are formed integrally by the technical program, not only avoid the alignment error of turbine, and the leaf on turbine
Piece is regular cylindrical face shape, and machining accuracy easily ensures, therefore balance quality is good, thus being conducive to micro- speed of mainshaft and rotating accuracy
Raising.
3. microminiature Porous hydrostatic gas-lubricated bearing supporting structure.The micro- main shaft of ultra-speed precise is subject to physical dimension and small zero
Part processing conditionss limit, and mainly adopt rolling bearing and the supporting of hole throttle type hydrostatic gas-lubricated bearing at present.Rolling bearing is at a high speed
Temperature rise during operation is higher, need to arrange cooling system, and this just makes micro- main axle structure complicated.Hole throttle type hydrostatic gas-lubricated bearing holds
Load is little, rigidity is low, causes beating with the raising of rotating speed of main shaft constantly to aggravate.The technical program adopts microminiature Porous
Hydrostatic gas-lubricated bearing supports, and not only avoid problem of temperature rise, and bearing capacity and stiffness is all lifted it is ensured that micro- main shaft superelevation
High rotating accuracy under rotating speed.
4. the method for clamping that expands with heat and contract with cold of micro- cutter.Existing micro- main shaft clamps micro- cutter, bullet frequently with small collet
The manufacture alignment error of spring chuck not only can be directly delivered on micro- cutter, leads to the runout error of micro- cutter to increase, and
Increase the amount of unbalance of spindle rotor, affect the rotating speed of micro- main shaft.And the technical program sets at the axis of spindle rotor front end
It is equipped with axial hole, effect clamps micro- cutter by expanding with heat and contract with cold, and realizes clamping and the replacing of cutter by the change of temperature
Requirement, the manufacture alignment error avoiding collet with this and its amount of unbalance brought into, thus be conducive to micro- main shaft gyration essence
Degree and its raising of rotating speed.
5. micro- cutter cantilevered length adjustable structure.Axial hole depth at the axis of spindle rotor front end is more than micro- cutter knife
Handle length, not only can adjust micro- cutter cantilevered length according to processing request, to meet the processing request in larger size range, more
It is important that before and after the baffle plate that can be arranged with spindle rotor rear end by adjusting micro- cutter cantilevered length is coordinated to ensure spindle rotor
End mass balance, reduces the runout error of spindle rotor.
6. spindle rotor structure is simple and symmetrical.Turbo blade on spindle rotor is the cylindrical of even number rule,
The axial hole of the baffle plate and front end setting of spindle rotor rear end setting be all cylinder or columnar structured it is seen that whole spindle rotor
Structure is very simple and symmetrical, and machining accuracy is easily guaranteed that is to say, that easily ensureing spindle rotor by processing and manufacturing precision
Amount of unbalance, thus being advantageously implemented the ultrahigh rotating speed of micro- main shaft and low runout error performance.
In sum, the present invention is novel in design rationally, structure is simple, small volume (<Diameter 30mm × long 45mm), manufacturer
Just, meet the product requirement of the marketization, and rotating speed is high, runout error is little, is particularly suitable for the fine of ultraprecise micro parts
The Fine Machineries such as milling, fine drilling, fine grinding process, can as micro- main shaft of microcomputer bed and other make high speed and ultrahigh speed,
The electromechanical equipment of high-precision rotary motion or micro- main shaft of hand tool.
Brief description
Fig. 1 is the main sectional view of the embodiment of the present invention.
Fig. 2 is the A-A sectional view (i.e. the equal pressure passageway of rear end Porous pressurized air thrust bearing air inlet) of Fig. 1 of the present invention.
Fig. 3 is the B-B sectional view (i.e. Porous pressurized air thrust bearing exhaust passage) of Fig. 1 of the present invention.
Fig. 4 is the C-C sectional view (i.e. rear end Porous pressurized air journal bearing inlet channel) of Fig. 1 of the present invention.
Fig. 5 is the D-D sectional view (i.e. turbine rear end exhaust passage) of Fig. 1 of the present invention.
Fig. 6 is the E-E sectional view (i.e. turbine inflow passages) of Fig. 1 of the present invention.
Fig. 7 is the F-F sectional view (i.e. turbine front end exhaust passage) of Fig. 1 of the present invention.
Fig. 8 is the G-G sectional view (i.e. spindle rotor rear end bearing exhaust duct) of Fig. 1 of the present invention
In accompanying drawing 1-8：1 casing, 2 rear end Porous pressurized air thrust bearings, 3 front end Porous pressurized airs
Thrust bearing, 4 rear end Porous pressurized air journal bearings, 5 rear end air-flow air intake ducts, 6 rear end Porous static pressure gas
Body bearing air supply opening, 7 apertures, 8 nozzle air supply openings, 9 front end Porous pressurized air journal bearing air supply openings, before 10
End air-flow air intake duct, 11 installing plates, 12 screws, 13 front end Porous pressurized air journal bearings, 14 axial hole,
15 micro- cutters, 16 spindle rotors, 17 front end bearing supports, 18 turbine nozzles, 19 turbines, 20 rear end bearings
Supporting member, 21 baffle plates, 22 rear end Porous pressurized air thrust bearing air supply openings, 23 thrust bearing air vents, 24
Turbine rear end air vent, 25 turbine rear end exhaust ducts, 26 turbine front end air vents, 27 turbine front end exhaust ducts, 28
Thrust bearing air intake duct, 29 blades, 30 equal pressing plates, 31 balancing orifices, 32 thrust bearing exhaust ducts, 33 rear end bearings
Exhaust duct.
Specific embodiment
With reference to embodiment and accompanying drawing, the present invention is elaborated.
Referring to accompanying drawing 1, Fig. 2, Fig. 3, Fig. 4, Fig. 5, Fig. 6, Fig. 7 and Fig. 8, described turbine 19 is directly in described spindle rotor 16
Centre processes, that is, turbine 19 and spindle rotor 16 are formed integrally, it is to avoid the alignment error of turbine 16, on described turbine 19
Blade 29 be regular cylindrical face shape, and just to the aperture 7 on turbine nozzle 18, described turbine nozzle 18 is provided with two circle apertures
7, in order to provide high velocity air drive shaft rotor 16 high-speed rotation, are returned using the ultrahigh speed that pneumatic microturbines realize micro- main shaft
Turn, described spindle rotor 16 front and back ends are respectively adopted front end Porous pressurized air journal bearing 13, rear end Porous static pressure gas
Body journal bearing 4 radial support, described spindle rotor 16 rear end is provided with baffle plate 21, and described baffle plate 21 front and back ends are respectively adopted
Front end Porous pressurized air thrust bearing 3, rear end Porous pressurized air thrust bearing 2 axially support, that is, adopt Porous
Hydrostatic gas-lubricated bearing realizes the ultra-precise revolving of micro- main shaft, and described spindle rotor 16 rear end is additionally provided with rear end bearing exhaust duct 33
In order to discharge air-flow, described front end Porous pressurized air journal bearing 13 is arranged in front end bearing support 17, described before
End bearing supporting member 17 circumference is evenly equipped with 4 front end air-flow air intake ducts 10, described rear end Porous pressurized air journal bearing 4 with
" L " shape that described front end Porous pressurized air thrust bearing 3 is formed integrally, and be arranged in rear end bearing supporting member 20, institute
State rear end bearing supporting member 20 circumference and be evenly equipped with 4 rear end air-flow air intake ducts 5, described rear end Porous pressurized air thrust bearing
2 pass through equal pressing plate 30 provides air-flow, and described equal pressing plate 30, rear end Porous pressurized air thrust bearing 2 are sequentially arranged at casing 1
Rear end, described rear end bearing supporting member 20, turbine nozzle 18, front end bearing support 17 are sequentially arranged in casing 1, and pass through
Installing plate 11, screw 12 fixedly mount it is seen that entirely the number of parts of micro- main shaft is few, structure is simple, processing cost is low, are conducive to
The marketization requirement of product, described casing 1 be provided with rear end Porous pressurized air thrust bearing air supply opening 22 and corresponding only
Thrust bearing air intake duct 28, thrust bearing exhaust duct 32, thrust bearing air vent 23, rear end Porous hydrostatic gas-lubricated bearing air supply opening
6th, turbine rear end air vent 24, nozzle air supply opening 8, turbine front end air vent 26, front end Porous pressurized air journal bearing supplies
QI KOU 9, is provided with axial hole 14 at described spindle rotor 16 front end axis, and by expanding with heat and contract with cold, effect clamps micro- milling cutter, micro- brill
Micro- cutters 15 such as head, micro- frotton or other microactuator, it is to avoid using the manufacture alignment error of collet, and axial hole
14 depth are more than micro- cutter 15 shank length, thus the micro- cutter of scalable 15 cantilevered length, not only can achieve larger size range
Fine Machinery processing it is often more important that can with spindle rotor 16 rear end setting baffle plate 21 coordinate ensure spindle rotor 16 before and after
End mass balance, reduces the runout error of spindle rotor 16, lifts the rotating accuracy of micro- cutter 15.
Referring to accompanying drawing 1 and Fig. 6, described turbine nozzle 18 is not limited to arrange two circle apertures 7, and more undersized aperture is certain
In the range of be provided that the air-flow of more speed, but active force is little, therefore can according to output speed, torque request setting individual pen or
Multi-turn aperture 7, that is, while realizing turbine 19 ultrahigh rotating speed, output torque also to be ensured, will to meet Fine Machinery processing
Ask.
Referring to accompanying drawing 1 and Fig. 4, described front end bearing support 17 is not limited to uniform 4 front end air-flow air intake ducts 10, described
Rear end bearing supporting member 20 is also not necessarily limited to uniform 4 rear end air-flow air intake ducts 5, and described equal pressing plate 30 is also not necessarily limited to uniform 4 all
Pressure hole 31, can be arranged as required to air intake duct or the balancing orifice of other quantity, but need circumference to be uniformly arranged it is therefore an objective to reduce superelevation
The impact to porous bearings deformation for the fast airflow asymmetry impact, and then ensure the high rotating accuracy of spindle rotor.
The operation principle of the present invention is briefly described as below：Source of the gas enters in turbine nozzles 18 through two nozzle air supply openings 8, with after warp
Aperture 7 forms ultrahigh speed air-flow, acts on the blade 29 on turbine 19, promotes spindle rotor 16 to rotate, the air-flow thereafter letting out
, through turbine front end exhaust duct 27, turbine front end air vent 26, another part is through turbine rear end exhaust duct 25, turbine rear end for a part
Air vent 24 is discharged, thus realizing the ultrahigh speed rotation performance of micro- main shaft；The radial support of spindle rotor 16 front end is in source of the gas
Enter in front end bearing support 17 through front end Porous pressurized air journal bearing air supply opening 9, subsequently through front end air-flow air inlet
Road 10 flows in front end Porous pressurized air journal bearing 13, by hydrostatic pressure supporting spindle rotor 16 rear portion air-flow
It is expelled directly out, another part air-flow is discharged through turbine front end exhaust duct 27, turbine front end air vent 26, spindle rotor 16 rear end
Radial support be source of the gas through rear end Porous hydrostatic gas-lubricated bearing air supply opening 6 enter rear end bearing supporting member 20 in, with after warp
Rear end air-flow air intake duct 5 enters in rear end Porous pressurized air journal bearing 4, after hydrostatic pressure supporting spindle rotor 16
A part of air-flow is discharged through turbine rear end exhaust duct 25, turbine rear end air vent 24, and another part air-flow is through rear end bearing aerofluxuss
Road 33, thrust bearing exhaust duct 32 are discharged, thus realizing the radial support positioning to spindle rotor 16；The axial direction of spindle rotor 16
Supporting is to be realized by the baffle plate 21 of setting, and a part of air-flow specifically entering in rear end bearing supporting member 20 can enter gear
In plate 21 front end Porous pressurized air thrust bearing 3, by baffle plate 21 rear portion of hydrostatic pressure supporting spindle rotor 16
Flow out through thrust bearing air vent 23, another part is discharged through rear end bearing exhaust duct 33, thrust bearing exhaust duct 32, baffle plate 21
The supporting of rear end is from rear end Porous pressurized air thrust bearing air supply opening 22, thrust bearing air intake duct 28 in source of the gas, all presses
After balancing orifice 31 on plate 30, enter in rear end Porous pressurized air thrust bearing 2, by hydrostatic pressure supporting spindle rotor
After 16 baffle plate 21, a part of air-flow is discharged through thrust bearing air vent 23, and another part air-flow is through thrust bearing exhaust duct 32
Discharge, thus realizing the axial direction supporting positioning to spindle rotor 16, using the supporting of Porous hydrostatic gas-lubricated bearing, not only can be effective
Reduce using frictional power loss during rolling bearing supporting, and compare hole throttle type hydrostatic gas-lubricated bearing, bearing capacity is more
High, rigidity is bigger, therefore can effectively solving micro- main shaft ultrahigh speed rotation when big runout error problem；Micro- cutter 15 passes through flatulence of heat type
Shrinkage effect is clamped in the axial hole 14 of spindle rotor 16, it is to avoid using the manufacture alignment error of collet, Er Qieyou
In axial hole 14 depth be more than micro- cutter 15 handle of a knife length, the therefore cantilevered length of the micro- cutter of scalable 15, so not only
The processing request in larger size range can be met it is often more important that reality can be coordinated with the baffle plate 21 of spindle rotor 16 rear end setting
The fine balance of existing spindle rotor 16 front and back end requires, and is very beneficial for the realization of micro- main shaft ultra-precise revolving requirement.
Claims (3)
1. a kind of Fine Machinery processing uses micro- main shaft, including casing 1, equal pressing plate 30, rear end bearing supporting member 20, turbine nozzle
18th, front end bearing support 17, spindle rotor 16, micro- cutter 15 and installing plate 11, is characterized in that：Described turbine 19 is directly in institute
State and process in the middle of spindle rotor 16, the blade 29 on described turbine 19 is regular cylindrical face shape, and just to turbine nozzle 18
On aperture 7, described turbine nozzle 18 is provided with two circle apertures 7 in order to provide high velocity air drive shaft rotor 16 to revolve at a high speed
Turn, described spindle rotor 16 front and back ends are respectively adopted front end Porous pressurized air journal bearing 13, rear end Porous static pressure gas
Body journal bearing 4 radial support is installed, and described spindle rotor 16 rear end is provided with baffle plate 21, and described baffle plate 21 front and back ends are respectively
Using front end Porous pressurized air thrust bearing 3, rear end Porous pressurized air thrust bearing 2, axially supporting is installed, described
Spindle rotor 16 rear end is additionally provided with rear end bearing exhaust duct 33 in order to discharge air-flow, and described front end Porous pressurized air is radially
Bearing 13 is arranged in front end bearing support 17, and described front end bearing support 17 circumference is evenly equipped with 4 front end air-flow air inlets
Road 10, described rear end Porous pressurized air journal bearing 4 and described front end Porous pressurized air thrust bearing 3 are formed integrally
" L " shape, and be arranged in rear end bearing supporting member 20, described rear end bearing supporting member 20 circumference is evenly equipped with 4 rear end air-flows
Air intake duct 5, described rear end Porous pressurized air thrust bearing 2 passes through equal pressing plate 30 provides air-flow, described equal pressing plate 30, rear end
Porous pressurized air thrust bearing 2 is sequentially arranged at casing 1 rear end, described rear end bearing supporting member 20, turbine nozzle 18, front
End bearing supporting member 17 is sequentially arranged in casing 1, and is fixedly mounted by installing plate 11, screw 12, and described casing 1 is provided with
Rear end Porous pressurized air thrust bearing air supply opening 22 and corresponding thrust bearing air intake duct 28, thrust bearing exhaust duct 32,
Thrust bearing air vent 23, rear end Porous hydrostatic gas-lubricated bearing air supply opening 6, turbine rear end air vent 24, nozzle air supply opening 8,
Turbine front end air vent 26, front end Porous pressurized air journal bearing air supply opening 9, set at described spindle rotor 16 front end axis
It is equipped with axial hole 14, effect clamps micro- cutter 15 or other micro- execution machines such as micro- milling cutter, micro drill, micro- frotton by expanding with heat and contract with cold
Structure, and axial hole 14 depth is more than micro- cutter 15 shank length, thus the cantilevered length of the micro- cutter of scalable 15.
2. micro- main shaft is used in a kind of Fine Machinery processing according to claim 1, it is characterized in that：Described turbine nozzle 18 does not limit
In setting two circle aperture 7, single-turn or multi-turn aperture 7 can be arranged according to output speed, torque request.
3. micro- main shaft is used in a kind of Fine Machinery processing according to claim 2, it is characterized in that described front end bearing support
17 are not limited to uniform 4 front end air-flow air intake ducts 10, and described rear end bearing supporting member 20 is not limited to uniform 4 rear end air-flow air inlets
Road 5, described equal pressing plate 30 is also not necessarily limited to uniform 4 balancing orifices 31, can be uniformly arranged as needed other quantity air intake duct or
Balancing orifice.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201611082459.6A CN106424771B (en) | 2016-11-30 | 2016-11-30 | A kind of micro- main shaft of Fine Machinery processing |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201611082459.6A CN106424771B (en) | 2016-11-30 | 2016-11-30 | A kind of micro- main shaft of Fine Machinery processing |
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| Publication Number | Publication Date |
|---|---|
| CN106424771A true CN106424771A (en) | 2017-02-22 |
| CN106424771B CN106424771B (en) | 2018-03-13 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201611082459.6A Active CN106424771B (en) | 2016-11-30 | 2016-11-30 | A kind of micro- main shaft of Fine Machinery processing |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107322013A (en) * | 2017-08-29 | 2017-11-07 | 孙嘉骏 | The noncontact driven using air motor supports rotary main shaft device |
| CN108188417A (en) * | 2018-02-06 | 2018-06-22 | 中国计量大学 | A kind of multiple throttle type static pressure air-bearing electro spindle and its application method |
| CN114542324A (en) * | 2022-02-28 | 2022-05-27 | 北京盈天航空动力科技有限公司 | Porous two-phase bearing of micro turbojet engine and rotor supporting structure thereof |
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| CN103302316A (en) * | 2013-04-28 | 2013-09-18 | 湖南大学 | High-speed precision pneumatic micro main shaft |
Cited By (4)
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| CN107322013A (en) * | 2017-08-29 | 2017-11-07 | 孙嘉骏 | The noncontact driven using air motor supports rotary main shaft device |
| CN108188417A (en) * | 2018-02-06 | 2018-06-22 | 中国计量大学 | A kind of multiple throttle type static pressure air-bearing electro spindle and its application method |
| CN108188417B (en) * | 2018-02-06 | 2024-03-08 | 中国计量大学 | Multiple throttling type static pressure air floatation motorized spindle and application method thereof |
| CN114542324A (en) * | 2022-02-28 | 2022-05-27 | 北京盈天航空动力科技有限公司 | Porous two-phase bearing of micro turbojet engine and rotor supporting structure thereof |
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