CN205703712U - Dome-type hydrodynamic bearing part grinding tool - Google Patents

Dome-type hydrodynamic bearing part grinding tool Download PDF

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Publication number
CN205703712U
CN205703712U CN201620389061.6U CN201620389061U CN205703712U CN 205703712 U CN205703712 U CN 205703712U CN 201620389061 U CN201620389061 U CN 201620389061U CN 205703712 U CN205703712 U CN 205703712U
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Prior art keywords
main shaft
dome
hydrodynamic bearing
retainer
grinding tool
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CN201620389061.6U
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Chinese (zh)
Inventor
鲁军
韩健
赵娟莉
李京宏
邓金刚
孟华
陈雨沼
郭宇帆
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Xian Aerospace Precision Electromechanical Institute
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Xian Aerospace Precision Electromechanical Institute
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Abstract

This utility model provides a kind of dome-type hydrodynamic bearing part grinding tool, and wherein grinding tool includes retainer, frock main shaft and locating piece;Retainer be uniformly distributed on peripheries with pin, the outside of pin is provided with soket head cap screw;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 it is provided with on locating piece.This utility model solves the technical barrier that dome-type machine parts'precise is ground, compared with traditional manual polishing, there is 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.

Description

Dome-type hydrodynamic bearing part grinding tool
Technical field
This utility model belongs to sphere precise finiss application, for high accuracy, high rigidity, height unmanageable The Ultra-precision Turning of dome-type hydrodynamic bearing part, relates to a kind of dome-type hydrodynamic bearing part grinding tool.
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
This utility model purpose is to provide a kind of dome-type hydrodynamic bearing part grinding tool, which solves hemisphere A type hydrodynamic bearing machine parts'precise grinding technique difficult problem, it is ensured that it is micro-that the circularity of hemisphere part different directions is not more than 0.3 Rice, the working clearance of hydrodynamic bearing and dimensional accuracy reach micron order requirement.
Technical solution of the present utility model:
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.
Advantage of the present utility model:
This utility model solves the technical barrier that dome-type machine parts'precise is ground, with traditional manual polishing phase Ratio, has higher working (machining) efficiency, and simultaneously during precise finiss, machining state is stable, can reach relatively High 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 (3)

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.
CN201620389061.6U 2015-12-31 2016-04-29 Dome-type hydrodynamic bearing part grinding tool Active CN205703712U (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
CN201521139862 2015-12-31
CN2015211398629 2015-12-31

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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN105834885A (en) * 2015-12-31 2016-08-10 西安航天精密机电研究所 Hemispherical dynamic pressure bearing part grinding tool and grinding method

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN105834885A (en) * 2015-12-31 2016-08-10 西安航天精密机电研究所 Hemispherical dynamic pressure bearing part grinding tool and grinding method
CN105834885B (en) * 2015-12-31 2018-04-13 西安航天精密机电研究所 Dome-type hydrodynamic bearing part Ginding process

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