CN105834885A - Hemispherical dynamic pressure bearing part grinding tool and grinding method - Google Patents
Hemispherical dynamic pressure bearing part grinding tool and grinding method Download PDFInfo
- Publication number
- CN105834885A CN105834885A CN201610284160.2A CN201610284160A CN105834885A CN 105834885 A CN105834885 A CN 105834885A CN 201610284160 A CN201610284160 A CN 201610284160A CN 105834885 A CN105834885 A CN 105834885A
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- Prior art keywords
- grinding
- main shaft
- hemisphere
- bearing part
- grind
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Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B24—GRINDING; POLISHING
- B24B—MACHINES, DEVICES, OR PROCESSES FOR GRINDING OR POLISHING; DRESSING OR CONDITIONING OF ABRADING SURFACES; FEEDING OF GRINDING, POLISHING, OR LAPPING AGENTS
- B24B37/00—Lapping machines or devices; Accessories
- B24B37/02—Lapping machines or devices; Accessories designed for working surfaces of revolution
- B24B37/025—Lapping machines or devices; Accessories designed for working surfaces of revolution designed for working spherical surfaces
-
- 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
- B24B37/00—Lapping machines or devices; Accessories
- B24B37/34—Accessories
-
- 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
- B24B41/04—Headstocks; Working-spindles; Features relating thereto
Abstract
The invention provides a hemispherical dynamic pressure bearing part grinding tool and grinding method. The grinding tool comprises a transmission base, a tool main shaft and a positioning block; pins are evenly distributed on the periphery of the transmission base, and socket head cap screws are arranged on the outer sides of the pins; the bottom end of the tool main shaft is arranged in the center of the transmission base, and a positioning block is arranged at the top end of the tool main shaft; and a horn opening used for containing steel balls is arranged on the positioning block. The grinding method includes the steps that (1) the accuracy of the gyration center of a main shaft of a grinding machine is adjusted; (2) the coincident accuracy of a swing shaft of the grinding machine and the perpendicular main shaft axis is adjusted; (3) the height of the sphere centre of the main shaft of the grinding machine is adjusted; and (4) grinding is carried out. By means of the hemispherical dynamic pressure bearing part grinding tool and grinding method, the technical problems in hemispherical part premise grinding are solved; compared with traditional manual grinding and polishing, the high machining efficiency is achieved; and meanwhile, in the premise grinding process, the machining state is stable, the high machining quality can be achieved, the machining accuracy can reach 0.02 micrometer, and the requirement for a working gap of a dynamic pressure bearing is met.
Description
Technical field
The invention belongs to sphere precise finiss application, for high accuracy, high rigidity, high unmanageable hemisphere
The Ultra-precision Turning of type hydrodynamic bearing part, relates to a kind of dome-type hydrodynamic bearing part grinding tool and grinding
Method.
Background technology
Dome-type hydrodynamic bearing uses opposed dome-type structure, for the core component of gyro machine, by convex
Hemisphere and recessed hemisphere composition, for increasing physics and the chemistry such as the hardness of piece surface, wearability and corrosion resistance
Performance, convex hemisphere sphere spraying plating titanium nitride film+diamond-film-like, recessed hemisphere sphere spraying plating titanium nitride film；For protecting
Card dome-type hydrodynamic bearing has good dynamic pressure effect and bearing capacity, the working clearance of hydrodynamic bearing and chi
Very little precision is micron order, and the circularity of hemisphere part different directions is not more than 0.3 micron；Meanwhile, hydrodynamic bearing
Starting and contacting in taxiing procedures, there is friction wear phenomenon in bearing contact surfaces, in order to reduce the mill of material
Damaging, improve the life-span of bearing, the surface roughness requirements of bearing is not more than 0.012 micron, will meet such height
Precision index, need take grind method complete.
The equipment that this method mainly uses is precision ball surface grinding.Main from grinder mechanism, Ginding process
And the aspect such as abrasive parameters carries out.In process of lapping, vertical major drives part about the z axis at XY water
Rotating in plane, concurrently Y-direction balance staff is passed by steel ball through depression bar under the effect of preloading extension spring
Passing on drive lap tool handle, direct at the part centre of sphere along lap tool axis pressure, lap tool sets in ZY plane with balance staff
The swing of angle, lap tool rotates at part and is formed relative with part sphere under the compound action of the swing of balance staff
Differential motion.Between lap tool and part, smear abrasive sand, be achieved that the generated processing grinding part sphere.
Summary of the invention
It is an object of the present invention to provide a kind of dome-type hydrodynamic bearing part grinding tool and Ginding process, it solves
A dome-type hydrodynamic bearing machine parts'precise grinding technique difficult problem, it is ensured that the circularity of hemisphere part different directions is little
In 0.3 micron, the working clearance of hydrodynamic bearing and dimensional accuracy reach micron order requirement.
The technical solution of the present invention:
This dome-type hydrodynamic bearing part grinding tool, including retainer, frock main shaft and locating piece；Described
Retainer be uniformly distributed on peripheries with pin, the outside of pin is provided with soket head cap screw；The end of described frock main shaft
End is arranged at the center of retainer, and the top of frock main shaft is provided with locating piece；It is provided with on described locating piece
For placing the horn mouth of steel ball.
The quantity of above-mentioned pin and soket head cap screw is 4.
The outer sheath of above-mentioned frock main shaft is connected to clamp device.
This dome-type hydrodynamic bearing part Ginding process, comprises the following steps:
1) precision of adjustment grinder main shaft rotation center:
1.1) vertical major of frock is placed concentrically in retainer；
1.2) retainer of frock is fixed with grinder main shaft；
1.3) the relative of four pins is regulated by the soket head cap screw of four circumference uniform distributions in regulation retainer
Displacement, rotates grinder main shaft；
1.4) the hemisphere horizontal rotation center above vertical major is detected, if the centre of gyration is inclined with amesdial
Difference in 2um, then terminates to adjust, otherwise returns step 1.3；
2) adjustment grinder balance staff and the precision of vertical major dead in line:
2.1) Φ 18 standard steel ball is placed in the horn mouth of the vertical major after step 1 regulates；
2.2) ten ten thousandth micrometers are arranged on balance staff, and Φ 18 standard steel bead surface is carried out vertical direction pressure table；
2.3) adjust the gap of balance staff location screw, then rotate grinder main shaft, simultaneously drive balance staff at ZY
Plane is by the swing of the pendulum angle set；
2.4) if balance staff ten corresponding to the maximum pendulum angle point 1,3 of Φ 18 standard steel bead surface very much
Table indicator value difference within 2um, cylindrical pins positioning and fastening balance staff, otherwise return step 2.3；
3) grinder main shaft centre of sphere height is adjusted:
3.1) the regulation bolt below regulation vertical major；
3.2) rotate grinder main shaft, simultaneously drive balance staff and make the swing of set angle in ZY plane；
3.3) if balance staff is at maximum pendulum angle point 1 or 3 and Φ 18 standard steel of Φ 18 standard steel bead surface
The ten ten thousandth micrometer indicator values corresponding to peak 2 of bead surface are consistent, then regulate complete, take off Φ 18 standard
Steel ball, otherwise returns step 3.1；
4) grind:
4.1) hemisphere to be ground put into the horn mouth of vertical major and fix；
4.2) boron carbide abrasive pastes are used to grind hemisphere once, 20 minutes；
4.3) grind, until roundness measurement is qualified with abrasive pastes；
4.4) hemisphere is cleaned, warehouse-in.
Also include the step improving sphere fineness: the hemisphere that roundness measurement is qualified is ground again, directly
Qualified to fineness detection.
The above-mentioned hemisphere qualified to roundness measurement is ground specifically comprising the following steps that again
Grind with W0.25 diamond paste, grind 3 times, 20 minutes/time.
The abrasive parameters of above-mentioned steps 4.3 is as follows:
Grinding rod is to thrust 6N of hemisphere～20N；
Pendulum angle ± 45 ° of grinding rod；
Back and forth draw journey frequency 57 frequency/minute.
Above-mentioned steps 4.3 is specific as follows:
First use white fused alumina abrasive pastes or W14 boron carbide abrasive pastes, W5 diamond paste grinding hemisphere once,
20 minutes；Grind with W1 diamond paste again, front and back grind 3～5 times, 20 minutes/time, remove half
The grinding marks of smooth grinding；
Above-mentioned steps 4.4 is specific as follows:
After gasoline cleans, ultrasonic waves for cleaning is clean, puts into Turnover Box.
Advantages of the present invention:
The present invention solves the technical barrier that dome-type machine parts'precise is ground, compared with traditional manual polishing,
Having higher working (machining) efficiency, simultaneously during precise finiss, machining state is stable, can reach higher
Crudy, machining accuracy can reach 0.02 micron, meets the requirement of hydrodynamic bearing working clearance.
Accompanying drawing explanation
Fig. 1 is grinder main shaft gyration regulation of mental activities schematic diagram；
Fig. 2 is grinder main shaft gyration regulation of mental activities sectional view；
Fig. 3 is Z axis centre of sphere height adjustment schematic diagram.
Reference is as follows:
1-gauge head；2-retainer；3-pin；4-soket head cap screw；5-frock main shaft；6-hemisphere；7-locating piece；
8-standard steel ball.
Detailed description of the invention
Dome-type hydrodynamic bearing part grinding tool as depicted in figs. 1 and 2, including retainer 2, frock master
Axle 5 and locating piece 7；Retainer 2 be uniformly distributed on peripheries with four pins 3, the outside of four pins 3 sets respectively
It is equipped with four soket head cap screws 4；The bottom of frock main shaft 5 is arranged at the center of retainer 2, frock main shaft 5
Top be provided with locating piece 7；The horn mouth for placing steel ball it is provided with on locating piece 7, frock main shaft
Outer sheath is connected to clamp device.
This dome-type hydrodynamic bearing part Ginding process, comprises the following steps:
1) precision of adjustment grinder main shaft rotation center:
1.1) vertical major of frock is placed concentrically in retainer 2；
1.2) retainer 2 of frock is fixed with grinder main shaft；
1.3) four pins 3 are regulated by the soket head cap screw 4 of regulation interior four circumference uniform distributions of retainer 2
Relative displacement, rotates grinder main shaft；
1.4) the hemisphere 6 horizontal rotation center above vertical major is detected with amesdial, if the centre of gyration
Deviation in 2um, then terminates to adjust, otherwise returns step 1.3；
2) adjustment grinder balance staff and the precision of vertical major dead in line:
2.1) vertical major of locating piece 7 is placed concentrically in retainer, Φ 18 standard steel ball 8 is placed on
In the horn mouth of the vertical major after step 1 regulation；
2.2) ten ten thousandth micrometers are arranged on balance staff, and Φ 18 standard steel ball 8 surface is carried out vertical direction pressure
Table；
2.3) adjust the gap of balance staff location screw, then rotate grinder main shaft, simultaneously drive balance staff at ZY
Plane is by the swing of the pendulum angle set；
2.4) if corresponding to the balance staff maximum pendulum angle point 1,3 on Φ 18 standard steel ball 8 surface 100,000
Point table indicator value difference within 2um, cylindrical pins positioning and fastening balance staff, otherwise return step 2.3；
3) grinder main shaft centre of sphere height is adjusted:
3.1) the regulation bolt below regulation vertical major；
3.2) rotate grinder main shaft, simultaneously drive balance staff and make the swing of set angle in ZY plane；
3.3) if balance staff maximum pendulum angle point 1 or 3 and Φ 18 standard on Φ 18 standard steel ball 8 surface
The ten ten thousandth micrometer indicator values corresponding to peak 2 on steel ball 8 surface are consistent, then regulate complete, take off Φ 18
Standard steel ball 8, otherwise returns step 3.1；
4) grind:
4.1) hemisphere 6 to be ground is put into the horn mouth of vertical major and fixed；
4.2) boron carbide abrasive pastes are used to grind hemisphere 6 once, 20 minutes；
4.3) grind, until roundness measurement is qualified with abrasive pastes；
4.4) hemisphere 6 is cleaned, warehouse-in.
Also include the step improving sphere fineness: the hemisphere 6 that roundness measurement is qualified is ground again,
Until fineness detection is qualified.
Again it is ground specifically comprising the following steps that to the hemisphere 6 that roundness measurement is qualified and grinds with W0.25 diamond
Mill cream grinds, and grinds 3 times, 20 minutes/time.
Step 4.3 is specific as follows: first grind with white fused alumina abrasive pastes or W14 boron carbide abrasive pastes, W5 diamond
Mill cream grinds hemisphere 6 once, 20 minutes；Grind with W1 diamond paste again, front and back grind 3～5 times,
20 minutes/time, remove the grinding marks of half smooth grinding；
Step 4.4 is specific as follows: after gasoline cleans, and ultrasonic waves for cleaning is clean, puts into Turnover Box.
The concrete technology of this dome-type hydrodynamic bearing part Ginding process is as follows:
1, the adjustment of grinder main shaft rotation center precision
4 regulation of mental activities frocks according to lathe chuck centering principle design, as it is shown in figure 1, by adjusting
4 mutually orthogonal points, with amesdial detection hemi-sphere 6 horizontal rotation center, can adjust control 2um with
In；Gauge head 1 is measured by amesdial.
2, grinder balance staff and the determination of main-shaft axis registration accuracy
Manufacture and design detecting tool, use Φ 18 standard steel ball to be ground machine horizontal rotation frock main shaft 5 He
The precision that balance staff axis intersects in vertical direction adjusts (as shown in Figure 2), uses ten ten thousandth micrometers in vertical direction
Pressure table, adjusts balance staff location screw clearances, measures and ensure 1, and between 3, ten ten thousandth micrometer indicator values are at 2um
Within, now balance staff axis overlaps with main-shaft axis, cylindrical pins positioning and fastening balance staff.
3, the measurement of grinder main shaft centre of sphere height
As in figure 2 it is shown, use ten ten thousandth micrometer detection hemi-sphere 6 beat radius size poor, adjust by screwing bolt
Whole centre of sphere height, it is ensured that 1, ten ten thousandth micrometer indicator values are consistent between 2, the now frock centre of sphere and grinder ball
The heart overlaps, metering frock total height and steel ball radius, can draw grinder centre of sphere height.When part grinds,
The height adjusting clamping tooling is needed to overlap with grinder centre of sphere height.
4, abrasive parameters
White fused alumina abrasive pastes, boron carbide abrasive pastes, diamond paste；
Grinding rod is to thrust 6N of semi-products～20N；
Grinding rod pendulum angle ± 45 °；
Back and forth draw journey frequency 57 frequency/minute；
5, technological process
1) fastening hemisphere 6, with amesdial measurement hemisphere 6 centre of gyration within 0.002, uses boron carbide
Abrasive pastes grind hemisphere 6,20 minutes once；
2) grind with diamond paste, front and back grind 3～5 times, 20 minutes/time, remove half smooth grinding
Grinding marks；
3) grind with precision diamond abrasive pastes, grind 3 times, 20 minutes/time, improve the fineness of sphere；
4), after gasoline cleans, ultrasonic waves for cleaning is clean, puts into hemisphere 6 Turnover Box.
6, embodiment
Left (right) hemisphere 6 of certain model belongs to typical dome-type hydrodynamic bearing part, can by this Ginding process
To solve a process technology difficult problem, machining accuracy can reach 0.3um.
6.1 abrasive parameters
W14 boron carbide abrasive pastes, W5, W1, W0.25 diamond paste；
Grinding rod thrust 8N to semi-products；
Grinding rod pendulum angle ± 45 °；
Back and forth draw journey frequency 57 frequency/minute；
6.2 technological process
1) fastening hemisphere 6, with amesdial measurement hemisphere 6 centre of gyration within 0.002, successively uses W14
Boron carbide abrasive pastes, W5 diamond paste grind hemisphere 6,20 minutes once；
2) grind with W1 diamond paste, front and back grind 3～5 times, 20 minutes/time, remove half lappingout
The grinding marks of mill；
3) grind with W0.25 diamond paste, grind 3 times, 20 minutes/time, improve the bright and clean of sphere
Degree；
4) after gasoline cleans, ultrasonic waves for cleaning is clean, puts into hemisphere 6 Turnover Box, detection turnover.
Claims (8)
1. a dome-type hydrodynamic bearing part grinding tool, it is characterised in that: include retainer, frock
Main shaft and locating piece；Described retainer be uniformly distributed on peripheries with pin, the outside of pin is provided with interior hexagonal spiral shell
Nail；The bottom of described frock main shaft is arranged at the center of retainer, and the top of frock main shaft is provided with location
Block；The horn mouth for placing steel ball it is provided with on described locating piece.
Dome-type hydrodynamic bearing part grinding tool the most according to claim 1, it is characterised in that:
The quantity of described pin and soket head cap screw is 4.
Dome-type hydrodynamic bearing part grinding tool the most according to claim 2, it is characterised in that:
The outer sheath of described frock main shaft is connected to clamp device.
4. a dome-type hydrodynamic bearing part Ginding process, it is characterised in that: comprise the following steps:
1) precision of adjustment grinder main shaft rotation center:
1.1) vertical major of positioning tool is placed concentrically in retainer；
1.2) retainer is fixed with grinder main shaft；
1.3) phase of four pins is regulated by the soket head cap screw of four circumference uniform distributions in regulation retainer
To displacement, rotate grinder main shaft；
1.4) the hemisphere horizontal rotation center above vertical major is detected with amesdial, if the centre of gyration
Deviation in 2um, then terminates to adjust, otherwise returns step 1.3；
2) adjustment grinder balance staff and the precision of vertical major dead in line:
2.1) vertical major of locating piece being placed concentrically in retainer, Φ 18 standard steel ball is placed on step
In horn mouth after 1 regulation；
2.2) ten ten thousandth micrometers are arranged on balance staff, and Φ 18 standard steel bead surface is carried out vertical direction pressure
Table；
2.3) adjust the gap of balance staff location screw, then rotate grinder main shaft, simultaneously drive balance staff and exist
ZY plane is by the swing of the pendulum angle set；
2.4) if balance staff is in 100,000 corresponding to the maximum pendulum angle point 1,3 of Φ 18 standard steel bead surface
Point table indicator value difference within 2um, cylindrical pins positioning and fastening balance staff, otherwise return step 2.3；
3) grinder main shaft centre of sphere height is adjusted:
3.1) the regulation bolt below regulation vertical major；
3.2) rotate grinder main shaft, simultaneously drive balance staff and make the swing of set angle in ZY plane；
3.3) if balance staff is in maximum pendulum angle point 1 or 3 and Φ 18 standard of Φ 18 standard steel bead surface
The ten ten thousandth micrometer indicator values corresponding to peak 2 of ball surfaces are consistent, then regulate complete, take off Φ 18
Standard steel ball, otherwise returns step 3.1；
4) grind:
4.1) hemisphere to be ground put into the horn mouth of vertical major and fix；
4.2) boron carbide abrasive pastes are used to grind hemisphere once, 20 minutes；
4.3) grind, until roundness measurement is qualified with abrasive pastes；
4.4) hemisphere is cleaned, warehouse-in.
Dome-type hydrodynamic bearing part Ginding process the most according to claim 4, it is characterised in that: also
Step including improving sphere fineness: the hemisphere that roundness measurement is qualified is ground again, until light
Cleanliness detection is qualified.
Dome-type hydrodynamic bearing part Ginding process the most according to claim 5, it is characterised in that: institute
State and be again ground specifically comprising the following steps that to the hemisphere that roundness measurement is qualified
Grind with W0.25 diamond paste, grind 3 times, 20 minutes/time.
7. according to dome-type hydrodynamic bearing part Ginding process described in claim 4 or 5 or 6, its feature
It is: the abrasive parameters of described step 4.3 is as follows:
Grinding rod is to thrust 6N of hemisphere～20N；
Pendulum angle ± 45 ° of grinding rod；
Back and forth draw journey frequency 57 frequency/minute.
Dome-type hydrodynamic bearing part Ginding process the most according to claim 7, it is characterised in that:
Described step 4.3 is specific as follows:
First with white fused alumina abrasive pastes or W14 boron carbide abrasive pastes, W5 diamond paste grinding hemisphere one
Secondary, 20 minutes；Grind with W1 diamond paste again, front and back grind 3～5 times, 20 minutes/time,
Remove the grinding marks of half smooth grinding；
Described step 4.4 is specific as follows:
After gasoline cleans, ultrasonic waves for cleaning is clean, puts into Turnover Box.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2015110314461 | 2015-12-31 | ||
| CN201511031446 | 2015-12-31 |
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| Publication Number | Publication Date |
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| CN105834885A true CN105834885A (en) | 2016-08-10 |
| CN105834885B CN105834885B (en) | 2018-04-13 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201610284160.2A Active CN105834885B (en) | 2015-12-31 | 2016-04-29 | Dome-type hydrodynamic bearing part Ginding process |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109483394A (en) * | 2018-09-13 | 2019-03-19 | 西安航晨机电科技股份有限公司 | Hemispherical resonator ultraprecise device for machining spherical surface and processing method |
| CN113134754A (en) * | 2021-05-21 | 2021-07-20 | 南京王行航空附件维修工程有限公司 | Method for repairing abraded oil distributing surface of oil cylinder of PTU rotor assembly |
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| JPH01163058U (en) * | 1988-04-27 | 1989-11-14 | ||
| JP2011177873A (en) * | 2010-03-03 | 2011-09-15 | Konica Minolta Opto Inc | Grinding device and grinding method |
| CN103264303A (en) * | 2013-05-16 | 2013-08-28 | 大连理工大学 | Pneumatic precise clamping device of low-rigidity thin-wall cavity part |
| CN104690563A (en) * | 2015-02-04 | 2015-06-10 | 超达阀门集团股份有限公司 | Work fixture with flashboard positioning height regulating mechanism for processing sealing surface of flashboard |
| CN205703712U (en) * | 2015-12-31 | 2016-11-23 | 西安航天精密机电研究所 | Dome-type hydrodynamic bearing part grinding tool |
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2016
- 2016-04-29 CN CN201610284160.2A patent/CN105834885B/en active Active
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH01163058U (en) * | 1988-04-27 | 1989-11-14 | ||
| JP2011177873A (en) * | 2010-03-03 | 2011-09-15 | Konica Minolta Opto Inc | Grinding device and grinding method |
| CN103264303A (en) * | 2013-05-16 | 2013-08-28 | 大连理工大学 | Pneumatic precise clamping device of low-rigidity thin-wall cavity part |
| CN104690563A (en) * | 2015-02-04 | 2015-06-10 | 超达阀门集团股份有限公司 | Work fixture with flashboard positioning height regulating mechanism for processing sealing surface of flashboard |
| CN205703712U (en) * | 2015-12-31 | 2016-11-23 | 西安航天精密机电研究所 | Dome-type hydrodynamic bearing part grinding tool |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109483394A (en) * | 2018-09-13 | 2019-03-19 | 西安航晨机电科技股份有限公司 | Hemispherical resonator ultraprecise device for machining spherical surface and processing method |
| CN109483394B (en) * | 2018-09-13 | 2023-12-12 | 西安航晨机电科技股份有限公司 | Ultra-precise spherical surface machining device and method for hemispherical harmonic oscillator |
| CN113134754A (en) * | 2021-05-21 | 2021-07-20 | 南京王行航空附件维修工程有限公司 | Method for repairing abraded oil distributing surface of oil cylinder of PTU rotor assembly |
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| CN105834885B (en) | 2018-04-13 |
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