CN105834885B - Dome-type hydrodynamic bearing part Ginding process - Google Patents
Dome-type hydrodynamic bearing part Ginding process Download PDFInfo
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- CN105834885B CN105834885B CN201610284160.2A CN201610284160A CN105834885B CN 105834885 B CN105834885 B CN 105834885B CN 201610284160 A CN201610284160 A CN 201610284160A CN 105834885 B CN105834885 B CN 105834885B
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- main shaft
- hemisphere
- dome
- balance staff
- grinder
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Classifications
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B24—GRINDING; POLISHING
- B24B—MACHINES, DEVICES, OR PROCESSES FOR GRINDING OR POLISHING; DRESSING OR CONDITIONING OF ABRADING SURFACES; FEEDING OF GRINDING, POLISHING, OR LAPPING AGENTS
- 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
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Grinding And Polishing Of Tertiary Curved Surfaces And Surfaces With Complex Shapes (AREA)
Abstract
The present invention, which provides a kind of dome-type hydrodynamic bearing part grinding tool and Ginding process, wherein grinding tool, includes retainer, frock main shaft and locating piece；Retainer is uniformly distributed on peripheries with pin, and soket head cap screw is provided with the outside of pin；The bottom of frock main shaft is arranged at the center of retainer, and the top of frock main shaft is provided with locating piece；The horn mouth for placing steel ball is provided with the locating piece.Ginding process is：1) precision of grinder main shaft rotation center is adjusted；2) precision that adjustment grinder balance staff is overlapped with vertical major axis；3) grinder main shaft centre of sphere height is adjusted；4) grind.The present invention solves the technical barrier of dome-type machine parts'precise grinding, compared with traditional manual polishing, with higher processing efficiency, at the same time during precise finiss, machining state is stablized, higher processing quality is can reach, machining accuracy can reach 0.02 micron, meet that the hydrodynamic bearing working clearance requires.
Description
Technical field
The invention belongs to sphere precise finiss application field, for high accuracy, high rigidity, high unmanageable dome-type dynamic pressure
The Ultra-precision Turning of bearing parts, is related to a kind of dome-type hydrodynamic bearing part grinding tool and Ginding process.
Background technology
Dome-type hydrodynamic bearing is the core component of gyro machine using opposed dome-type structure, by convex hemisphere and
Recessed hemisphere composition, to increase the physical and chemical properties such as hardness, wearability and the corrosion resistance of piece surface, convex hemisphere sphere spray
Titanium-nitride film+diamond-film-like, recessed hemisphere sphere spraying plating titanium nitride film；To ensure that dome-type hydrodynamic bearing has good move
Press effect and bearing capacity, the working clearance of hydrodynamic bearing and dimensional accuracy are micron order, the circle of hemisphere part different directions
Degree is not more than 0.3 micron；Meanwhile hydrodynamic bearing, in starting and contacting taxiing procedures, there are friction wear to show for bearing contact surfaces
As in order to reduce the abrasion of material, improving the service life of bearing, the surface roughness requirements of bearing are not more than 0.012 micron, to expire
Foot so high precision index is, it is necessary to take the method for grinding to complete.
The equipment that this method mainly uses is accurate sphere grinding machine.Mainly from grinder mechanism, Ginding process and grinding
Parameter etc. is carried out.In process of lapping, vertical major drives part to rotate about the z axis in XY horizontal planes, with
At the same time Y-direction balance staff preload tension spring under the action of through compression bar by steel ball transmission drive lap tool handle on, along lap tool axis pressure
The part centre of sphere is directed at, lap tool makees the swing of set angle with balance staff in ZY planes, and lap tool is in part rotation and the swing of balance staff
Relative mistake speed is formed under compound action with part sphere to move.Abrasive sand is smeared between lap tool and part, is achieved that grinding zero
Part sphere transforms into processing.
The content 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, hemisphere is which solved
Type hydrodynamic bearing machine parts'precise grinding technique problem, it is ensured that the circularity of hemisphere part different directions is not more than 0.3 micron, dynamic pressure shaft
The working clearance and dimensional accuracy held reach micron order requirement.
The technical solution of the present invention：
The dome-type hydrodynamic bearing part grinding tool, including retainer, frock main shaft and locating piece；The retainer
Pin is uniformly distributed on peripheries with, soket head cap screw is provided with the outside of pin；The bottom of the frock main shaft is arranged in retainer
The heart, the top of frock main shaft are provided with locating piece；The horn mouth for placing steel ball is provided with the locating piece.
The quantity of above-mentioned pin and soket head cap screw is 4.
Clamp device is socketed with the outside of above-mentioned frock main shaft.
The dome-type hydrodynamic bearing part Ginding process, comprises the following steps：
1) precision of grinder main shaft rotation center is adjusted：
1.1) the frock main shaft of frock is placed concentrically in retainer；
1.2) retainer of frock and grinder main shaft are fixed；
1.3) relative displacement of four pins is adjusted by adjusting the soket head cap screw of four circumference uniform distributions in retainer,
Rotate grinder main shaft；
1.4) the hemisphere horizontal rotation center above amesdial detecting tool main shaft is used, if the deviation of the centre of gyration exists
In 2um, then terminate to adjust, otherwise return to step 1.3；
2) precision that adjustment grinder balance staff is overlapped with frock main-shaft axis：
2.1) 18 standard steel balls of Φ are placed in the horn mouth of the frock main shaft after step 1 is adjusted；
2.2) ten ten thousandth micrometers are installed on balance staff, and 18 standard ball surfaces of Φ is carried out with vertical direction pressure table；
2.3) gap of balance staff positioning screw is adjusted, then rotates grinder main shaft, while drive balance staff to be pressed in ZY planes
The swing of the swing angle of setting；
If 2.4) ten ten thousandth micrometer indicator values corresponding to maximum pendulum angle point 1,3 of the balance staff in 18 standard ball surfaces of Φ
Difference is within 2um, cylindrical pins positioning and fastening balance staff, otherwise return to step 2.3；
3) grinder main shaft centre of sphere height is adjusted：
3.1) adjusting bolt below frock main shaft is adjusted；
3.2) grinder main shaft is rotated, while drives balance staff to make the swing of set angle in ZY planes；
If 3.3) maximum pendulum angle point 1 or 3 and Φ 18 standard ball surfaces of the balance staff in 18 standard ball surfaces of Φ
Peak 2 corresponding to ten ten thousandth micrometer indicator values it is consistent, then adjust finish, remove 18 standard steel balls of Φ, otherwise return to step
3.1；
4) grind：
4.1) hemisphere to be ground is put into the horn mouth of frock main shaft and fixed；
4.2) using boron carbide abrasive pastes grinding hemisphere once, 20 minutes；
4.3) ground with abrasive pastes, until roundness measurement is qualified；
4.4) hemisphere, storage are cleaned.
Further include the step of improving sphere finish：The hemisphere of roundness measurement qualification is ground again, until bright and clean
Degree detection is qualified.
The above-mentioned hemisphere to roundness measurement qualification is ground again to be comprised the following steps that：
Ground, ground 3 times, 20 minutes/time with W0.25 diamond pastes.
The abrasive parameters of above-mentioned steps 4.3 are as follows：
Thrust 6N~20N of the grinding rod to hemisphere；
Swing angle ± 45 ° of grinding rod；
Back and forth draw 57 frequency/minute of journey frequency.
Above-mentioned steps 4.3 are specific as follows：
With white fused alumina abrasive pastes, W14 boron carbides abrasive pastes or W5 diamond pastes grinding hemisphere once first, 20 minutes；
Ground again with W1 diamond pastes, front and rear to grind 3~5 times, 20 minutes/time, remove the grinding marks of half smooth grinding；
Above-mentioned steps 4.4 are specific as follows：
After gasoline cleaning, ultrasonic cleaning is clean, is put into turnover box.
Advantages of the present invention：
The present invention solve dome-type machine parts'precise grinding technical barrier, compared with traditional manual polishing, have compared with
High processing efficiency, while during precise finiss, machining state is stablized, and can reach higher processing quality, machining accuracy
0.02 micron is can reach, meets that the hydrodynamic bearing working clearance requires.
Brief description of the drawings
Fig. 1 is grinder main shaft gyration aligning schematic diagram；
Fig. 2 is grinder main shaft gyration aligning sectional view；
Fig. 3 is that the Z axis centre of sphere highly adjusts schematic diagram.
Reference numeral is as follows：
1- gauge heads；2- retainers；3- pins；4- soket head cap screws；5- frock main shafts；6- hemisphere；7- locating pieces；8- standards
Steel ball.
Embodiment
Dome-type hydrodynamic bearing part grinding tool as depicted in figs. 1 and 2, including retainer 2, frock main shaft 5 and fixed
Position block 7；Retainer 2 is uniformly distributed on peripheries with four pins 3, and the outside of four pins 3 is respectively arranged with four soket head cap screws 4；
The bottom of frock main shaft 5 is arranged at the center of retainer 2, and the top of frock main shaft 5 is provided with locating piece 7；Set on locating piece 7
It is useful for placing the horn mouth of steel ball, clamp device is socketed with the outside of frock main shaft.
The dome-type hydrodynamic bearing part Ginding process, comprises the following steps：
1) precision of grinder main shaft rotation center is adjusted：
1.1) the frock main shaft of frock is placed concentrically in retainer 2；
1.2) retainer 2 of frock is fixed with grinder main shaft；
1.3) the opposite position of four pins 3 is adjusted by adjusting the soket head cap screw 4 of four circumference uniform distributions in retainer 2
Move, rotate grinder main shaft；
1.4) the 6 horizontal rotation center of hemisphere above amesdial detecting tool main shaft is used, if the deviation of the centre of gyration exists
In 2um, then terminate to adjust, otherwise return to step 1.3；
2) precision that adjustment grinder balance staff is overlapped with frock main-shaft axis：
2.1) the frock main shaft of locating piece 7 is placed concentrically in retainer, 18 standard steel balls 8 of Φ are placed on step 1 adjusts
In the horn mouth of frock main shaft after section；
2.2) ten ten thousandth micrometers are installed on balance staff, and vertical direction pressure table is carried out to 18 standard steel balls of Φ, 8 surface；
2.3) gap of balance staff positioning screw is adjusted, then rotates grinder main shaft, while drive balance staff to be pressed in ZY planes
The swing of the swing angle of setting；
If 2.4) ten ten thousandth micrometer indicators corresponding to maximum pendulum angle point 1,3 of the balance staff on 18 standard steel balls of Φ, 8 surface
Value difference is within 2um, cylindrical pins positioning and fastening balance staff, otherwise return to step 2.3；
3) grinder main shaft centre of sphere height is adjusted：
3.1) adjusting bolt below frock main shaft is adjusted；
3.2) grinder main shaft is rotated, while drives balance staff to make the swing of set angle in ZY planes；
If 3.3) maximum pendulum angle point 1 or 3 and Φ 18 standard steel ball 8 table of the balance staff on 18 standard steel balls of Φ, 8 surface
Ten ten thousandth micrometer indicator values corresponding to the peak 2 in face are consistent, then adjust and finish, remove 18 standard steel balls 8 of Φ, otherwise return to step
Rapid 3.1；
4) grind：
4.1) hemisphere 6 to be ground is put into the horn mouth of frock main shaft and fixed；
4.2) using boron carbide abrasive pastes grinding hemisphere 6 once, 20 minutes；
4.3) ground with abrasive pastes, until roundness measurement is qualified；
4.4) hemisphere 6, storage are cleaned.
Further include the step of improving sphere finish：The hemisphere 6 of roundness measurement qualification is ground again, until bright and clean
Degree detection is qualified.
The hemisphere 6 of roundness measurement qualification is ground again and is comprised the following steps that：Ground with W0.25 diamond pastes
Mill, grinds 3 times, 20 minutes/time.
Step 4.3 is specific as follows：First ground with white fused alumina abrasive pastes or W14 boron carbides abrasive pastes, W5 diamond pastes
Hemisphere 6 once, 20 minutes；Ground again with W1 diamond pastes, front and rear to grind 3~5 times, 20 minutes/time, remove half smooth grinding
Grinding marks；
Step 4.4 is specific as follows：After gasoline cleaning, ultrasonic cleaning is clean, is put into turnover box.
The concrete technology of the dome-type hydrodynamic bearing part Ginding process is as follows：
1st, the adjustment of grinder main shaft rotation center precision
4 aligning frocks are devised according to lathe chuck centering principle, as shown in Figure 1, by adjusting mutually orthogonal
4 points, with 6 horizontal rotation center of amesdial detection hemi-sphere, control can be adjusted within 2um；Amesdial carries out gauge head 1
Measurement.
2nd, grinder balance staff and main-shaft axis registration accuracy determine
Manufacture and design detecting tool, machine horizontal rotation frock main shaft 5 and balance staff axis are ground using 18 standard steel balls of Φ
Line adjusts (as shown in Figure 2) in the precision that vertical direction intersects, and table, adjustment balance staff positioning are pressed in vertical direction using ten ten thousandth micrometers
Screw clearances, measure and ensure 1, and ten ten thousandth micrometer indicator values are within 2um between 3 points, balance staff axis and main-shaft axis weight at this time
Close, cylindrical pins positioning and fastening balance staff.
3rd, the measurement of grinder main shaft centre of sphere height
As shown in Fig. 2, it is poor using ten ten thousandth micrometer detection hemi-spheres, 6 beat radius size, adjust centre of sphere height by screwing bolt
Degree, ten ten thousandth micrometer indicator values are consistent between ensureing at 1,2 point, and the frock centre of sphere is overlapped with the grinder centre of sphere at this time, and metering frock is always high
Degree and steel ball radius, you can draw grinder centre of sphere height., it is necessary to adjust the height and grinder of clamping tooling when part is ground
The centre of sphere highly overlaps.
4th, abrasive parameters
White fused alumina abrasive pastes, boron carbide abrasive pastes, diamond paste；
Thrust 6N~20N of the grinding rod to semi-products；
Swing angle ± 45 ° of grinding rod；
Back and forth draw 57 frequency/minute of journey frequency；
5th, technological process
1) hemisphere 6 is fastened, 6 centre of gyration of hemisphere is measured within 0.002 with amesdial, is ground using boron carbide abrasive pastes
Hemisphere 6,20 minutes is once；
2) ground with diamond paste, front and rear to grind 3~5 times, 20 minutes/time, remove the grinding marks of half smooth grinding；
3) ground, ground 3 times, 20 minutes/time with precision diamond abrasive pastes, improve the finish of sphere；
4) after gasoline cleaning, ultrasonic cleaning is clean, is put into 6 turnover box of hemisphere.
6th, embodiment
Certain model left side (right side) hemisphere 6 belongs to typical dome-type hydrodynamic bearing part, can solve to add by this Ginding process
Work technical barrier, machining accuracy can reach 0.3um.
6.1 abrasive parameters
--- W14 boron carbides abrasive pastes, W5, W1, W0.25 diamond paste；
--- thrust 8N of the grinding rod to semi-products；
--- swing angle ± 45 ° of grinding rod；
--- back and forth draw 57 frequency/minute of journey frequency；
6.2 technological process
1) hemisphere 6 is fastened, 6 centre of gyration of hemisphere is measured within 0.002 with amesdial, is successively ground using W14 boron carbides
Grind cream, W5 diamond pastes grind hemisphere 6,20 minutes once；
2) ground with W1 diamond pastes, front and rear to grind 3~5 times, 20 minutes/time, remove the grinding marks of half smooth grinding；
3) ground, ground 3 times, 20 minutes/time with W0.25 diamond pastes, improve the finish of sphere；
4) after gasoline cleaning, ultrasonic cleaning is clean, is put into 6 turnover box of hemisphere, detection turnover.
Claims (5)
- A kind of 1. dome-type hydrodynamic bearing part Ginding process, it is characterised in that：Comprise the following steps：1) precision of grinder main shaft rotation center is adjusted：1.1) the frock main shaft of positioning tool is placed concentrically in retainer；1.2) retainer and grinder main shaft are fixed；1.3) relative displacement of four pins is adjusted by adjusting the soket head cap screw of four circumference uniform distributions in retainer, rotated Grinder main shaft；1.4) with the hemisphere horizontal rotation center above amesdial detecting tool main shaft, if the deviation of the centre of gyration in 2um, Then terminate to adjust, otherwise return to step 1.3；2) precision that adjustment grinder balance staff is overlapped with frock main-shaft axis：2.1) the frock main shaft of locating piece is placed concentrically in retainer, 18 standard steel balls of Φ are placed on the loudspeaker after step 1 is adjusted In mouth；2.2) ten ten thousandth micrometers are installed on balance staff, and 18 standard ball surfaces of Φ is carried out with vertical direction pressure table；2.3) gap of balance staff positioning screw is adjusted, then rotates grinder main shaft, while drive balance staff in ZY planes by setting Swing angle swing；2.4) if ten ten thousandth micrometer indicator value differences corresponding to maximum pendulum angle point 1,3 of the balance staff in 18 standard ball surfaces of Φ exist Within 2um, cylindrical pins positioning and fastening balance staff, otherwise return to step 2.3；3) grinder main shaft centre of sphere height is adjusted：3.1) adjusting bolt below frock main shaft is adjusted；3.2) grinder main shaft is rotated, while drives balance staff to make the swing of set angle in ZY planes；If 3.3) balance staff 18 standard ball surfaces of Φ maximum pendulum angle point 1 or 3 and 18 standard ball surfaces of Φ most Ten ten thousandth micrometer indicator values corresponding to high point 2 are consistent, then adjust and finish, remove 18 standard steel balls of Φ, otherwise return to step 3.1；4) grind：4.1) hemisphere to be ground is put into the horn mouth of frock main shaft and fixed；4.2) using boron carbide abrasive pastes grinding hemisphere once, 20 minutes；4.3) ground with abrasive pastes, until roundness measurement is qualified；4.4) hemisphere, storage are cleaned.
- 2. dome-type hydrodynamic bearing part Ginding process according to claim 1, it is characterised in that：Further include and improve sphere light The step of cleanliness：The hemisphere of roundness measurement qualification is ground again, until finish detection is qualified.
- 3. dome-type hydrodynamic bearing part Ginding process according to claim 2, it is characterised in that：It is described that roundness measurement is closed The hemisphere of lattice is ground again to be comprised the following steps that：Ground, ground 3 times, 20 minutes/time with W0.25 diamond pastes.
- 4. according to the dome-type hydrodynamic bearing part Ginding process of claim 1 or 2 or 3, it is characterised in that：The step 4.3 abrasive parameters are as follows：Thrust 6N~20N of the grinding rod to hemisphere；Swing angle ± 45 ° of grinding rod；Back and forth draw 57 frequency/minute of journey frequency.
- 5. dome-type hydrodynamic bearing part Ginding process according to claim 4, it is characterised in that：The step 4.3 is specific as follows：With white fused alumina abrasive pastes, W14 boron carbides abrasive pastes or W5 diamond pastes grinding hemisphere once first, 20 minutes；Use again W1 diamond pastes are ground, front and rear to grind 3~5 times, 20 minutes/time, remove the grinding marks of half smooth grinding；The step 4.4 is specific as follows：After gasoline cleaning, ultrasonic cleaning is clean, is put into turnover box.
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| CN201511031446 | 2015-12-31 | ||
| CN2015110314461 | 2015-12-31 |
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| CN105834885B true CN105834885B (en) | 2018-04-13 |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| 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 |
| CN113134754B (en) * | 2021-05-21 | 2022-06-28 | 南京王行航空附件维修工程有限公司 | Method for repairing worn oil distributing surface of oil cylinder of PTU rotor assembly |
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 |
-
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 |
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