CN105157500A - Gyroscope frame part high-precision online measuring device and method - Google Patents
Gyroscope frame part high-precision online measuring device and method Download PDFInfo
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- CN105157500A CN105157500A CN201510219974.3A CN201510219974A CN105157500A CN 105157500 A CN105157500 A CN 105157500A CN 201510219974 A CN201510219974 A CN 201510219974A CN 105157500 A CN105157500 A CN 105157500A
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Abstract
The invention discloses a gyroscope frame part high-precision online measuring device and method. The device comprises a spiral micrometer (1) with precision above 0.001m, a first measuring head mounting block (3), a second measuring head mounting block (2) and a calibration column (4). The first measuring head mounting block (3) is mounted on a fixed rod end of the spiral micrometer (1), and the second measuring head mounting block (2) is mounted on a movable rod end of the spiral micrometer. The spiral micrometer (1) is adjusted to allow the first measuring head mounting block (3) and the second measuring head mounting block (2) to clamp the calibration column (4), so as to complete the calibration of the spiral micrometer (1). The spiral micrometer (1) is adjusted to allow the first measuring head mounting block (3) and the second measuring head mounting block (2) to clamp a portion to be measured of a gyroscope frame part so as to obtain the size of the portion to be measured of the gyroscope frame part. The invention has the advantages of low cost, simple structure, easy operation and easy maintenance and service.
Description
Technical field
The present invention relates to a kind of gyro gimbal part high-precision on-line measurement device and method
Background technology
Framework is gyroscope main components, is also the vital part during gyroscope manufactures.As the reference for installation platform of hemisphere hydrodynamic gas bearing gyro motor, magnetic levitation element, torquer holder assembly, sensor holder assembly, its machining precision is larger to instrumentation comprehensive performance impact.Relative-position error and the dimension precision requirement of framework upper sensor rotor, torquer rotor installation shaft and installed surface etc. are very high, to determine the exact position of frame system and to meet the disturbance torque of bolster generation minimum.Accuracy requirement is that face verticality, the depth of parallelism are within 0.001mm, symmetry is within 0.01mm, dimensional accuracy is ± 0.003, axial length is 1.3 ± 0.01, during measurement, because radial dimension is large, less or measured of axial length is the spacing of the face of cylinder and plane, and employing master screw dial gauge cannot on-line measurement.Along with the development of space flight inertial technology, the demand of high precision framework increases gradually, require that production unit possesses the ability of production in enormous quantities, traditional detection method uses import high precision three-dimensional coordinates measurement instrument, and this equipment is not only expensive, high to environmental requirement, maintaining difficulty is large, and measuring period is long, needs professional testing staff to operate, greatly have impact on the detection efficiency of framework.
Summary of the invention
The object of the invention is the deficiency in order to overcome available frame dimensional accuracy line Measurement Technique, proposing that a kind of cost is low, structure is simple, easy and simple to handle, care and maintenance is easy to gyro gimbal part high-precision on-line measurement device and method.
The object of the invention is to be achieved through the following technical solutions.
A kind of gyro gimbal part high-precision on-line measurement device, comprises spiral dial gauge, the first gauge head fixed block, the second gauge head fixed block and check and correction post that precision is more than 0.001m;
First gauge head fixed block is right cylinder or hemisphere, and material is wimet; Surfaceness is less than Ra0.05, hardness HRC55-60;
Second gauge head fixed block is right cylinder, and material is wimet, and cylindricity is less than 0.001mm, and the both ends of the surface depth of parallelism is less than 0.001mm, and surfaceness is less than Ra0.05, hardness HRC50-60;
Check and correction post is right cylinder, and material is wimet, and surfaceness is less than Ra0.002mm, and cylindricity is less than 0.005mm, and length is 10mm-35mm, and diameter is Φ 8-Φ 10mm;
First gauge head fixed block is arranged on spiral dial gauge and fixes rod end, and the second gauge head fixed block is arranged on the movable rod end of spiral dial gauge;
After the tested part of gyro gimbal part machines, adjustable screw dial gauge makes the first gauge head fixed block and the second gauge head fixed block clamping check and correction post, completes the check and correction of spiral dial gauge; Adjustable screw dial gauge makes the first gauge head fixed block and the tested part of the second gauge head fixed block clamping gyro gimbal part, obtains the tested portion size of gyro gimbal part.
When the tested part of described gyro gimbal part is that diameter is greater than 25mm, when axial length is less than the face of cylinder of 2mm, the first gauge head fixed block is right cylinder, and the first gauge head fixed block cylindricity is less than 0.001mm, and the depth of parallelism of both ends of the surface is less than 0.001mm.
When the tested portion size of described gyro gimbal part is the distance between FRAME COMPONENTS left or right end face and inner chamber circular hole, the first gauge head fixed block is hemisphere, and hemisphere five cross section circularity are less than 0.002mm, and the flatness of hemispherical plane is less than 0.001mm.
Length and the diameter of check and correction post is selected according to the length of the tested part of gyro gimbal part.
The method utilizing above-mentioned gyro gimbal part high-precision on-line measurement device to carry out on-line measurement is as follows: comprise the steps:
(1) process the tested part of gyro gimbal part, measure requirement to ensure to meet;
(2) adjustable screw dial gauge makes the first gauge head fixed block and the second gauge head fixed block clamping check and correction post, completes the check and correction of spiral dial gauge;
(3) adjustable screw dial gauge makes the first gauge head fixed block and the tested part of the second gauge head fixed block clamping gyro gimbal part, obtains this tested portion size of gyro gimbal part measured according to spiral dial gauge reading;
(4) repeat step and obtain repetitive measurement value, be averaging by repetitive measurement value and obtain the final tested portion size of gyro gimbal part.
When the tested portion size of described gyro gimbal part be rotor sensor or torquer rotor installation shaft time, the first gauge head fixed block is right cylinder, and the first gauge head fixed block cylindricity is less than 0.001mm, and the depth of parallelism of both ends of the surface is less than 0.001mm; Described step (one) be specially: the center hole of lappingout rotor sensor and torquer rotor installation shaft, ensure gyro gimbal part outer and top between right alignment be 0.001mm; Two are adopted toply to hold mode processed sensor rotor installation shaft and torquer rotor installation shaft, to ensure that two installation axis right alignmenies are within 0.003mm.
When the tested portion size of described gyro gimbal part is the distance between framework left or right end face and inner chamber circular hole, the first gauge head fixed block is for being hemisphere, and hemisphere five cross section circularity are less than 0.002mm, and the flatness of hemispherical plane is less than 0.001mm; Described step (one) be specially: the large cylindrical of finish turning gyro gimbal part two, ensures gyro gimbal part outer consistance 0.002mm, right alignment 0.001mm; The large cylindrical of gyro gimbal part one adopts frock clamping, and another large cylindrical of centering, to ensure that two cylindrical axis coaxle degree are within 0.003mm, then processes gyro gimbal part left or right end face.
The present invention compared with prior art, has following beneficial effect:
(1) gyro gimbal part high-precision on-line measurement device of the present invention adopts high-precision spiral dial gauge, and fix rod end and gauge head fixed block installed respectively by movable rod end at high-precision spiral dial gauge, structure is simple, and it is convenient to assemble, capable of automatic assembling, can on-line measurement be realized; Relative to the import high accuracy three coordinate tester of costliness, low price, total price be import high accuracy three coordinate tester ten thousand/; Accuracy of detection is high, and full accuracy can reach 0.001mm, suitable with the accuracy of detection of import high accuracy three coordinate; A kind of FRAME COMPONENTS high precision online measuring device of the present invention, without the need to special care and maintenance, only needs simple wiping before test, keeps each table top to clean; And import high accuracy three coordinate tester needs periodic calibration and maintenance, have impact on manufacturing schedule and result of use; Gyro gimbal part high-precision on-line measurement device method of operating of the present invention is simple, easy to use, can detect FRAME COMPONENTS online, and testing staff that need not be professional, those skilled in the art can use through brief study.
(2) measuring method of the present invention can realize the on-line measurement of gyro gimbal part high-precision, and detection time is short, and detection efficiency is high; The morpheme relation of one group of plane only needs 3 minutes detection time, and import high accuracy three coordinate tester is about more than 30 minutes detection time, and detection efficiency improves more than 10 times; The present invention can measure diameter large (D > Φ 25mm) and axial dimension little (L≤2mm) time radial dimension precision, and the axial distance between end face and inner chamber circular hole.
Accompanying drawing explanation
Fig. 1 is the structural representation of the first embodiment of on-line measurement device of the present invention;
Fig. 2 is the structural representation of the second embodiment of on-line measurement device of the present invention;
Fig. 3 is the structural representation of check and correction post of the present invention.
Embodiment
Below in conjunction with drawings and Examples, the invention will be further described.
Embodiment 1
As shown in Figure 1, the gyro gimbal part high-precision on-line measurement device of the present embodiment, comprises high-precision spiral dial gauge 1 (precision is more than 0.001m), the first gauge head fixed block 3, second gauge head fixed block 2 and check and correction post 4.First gauge head fixed block 3 is right cylinder, and right cylinder uses Hardmetal materials, and diameter is Φ 8mm, requires that cylindricity is less than 0.001mm, and the both ends of the surface depth of parallelism is less than 0.001mm, and surfaceness is less than Ra0.05, Rockwell's hardness HRC50-60; Second gauge head fixed block 2 is right cylinder, and right cylinder uses Hardmetal materials, and diameter is Φ 8mm, requires that cylindricity is less than 0.001mm, and the both ends of the surface depth of parallelism is less than 0.001mm, and surfaceness is less than Ra0.05, Rockwell's hardness HRC50-60; Check and correction post 4 is wimet cylinder, and surface smoothness is less than Ra0.002mm, and cylindricity is less than 0.005mm, and length is 25mm, and diameter is Φ 8mm.
The tested part of gyro gimbal part 5 is rotor sensor, torquer rotor installation shaft, and its diameter can be Φ 27.5 ± 0.003mm, also can be other size; First gauge head fixed block 3 is arranged on spiral dial gauge 1 and fixes rod end, is used for contacting with rotor installation shaft periphery during measurement; Second gauge head fixed block 2 is arranged on the movable rod end of spiral dial gauge 1, is used for contacting with rotor installation shaft periphery during measurement.
The gyro gimbal part high-precision On-line Measuring Method of the present embodiment can be used in the diameter of survey sensor rotor installation shaft 52 or torquer rotor installation shaft 51; Specifically comprise the steps:
(1) need lappingout two axial ends center hole before gyro gimbal part 5 finishing, ensure right alignment 0.001mm between FRAME COMPONENTS cylindrical and top 6,7;
(2) framework 5 upper sensor rotor installation shaft 52 and torquer rotor installation shaft 51 adopt two ends to hold mode to process, to ensure that two installation axis right alignmenies are within 0.003mm;
(3) use check and correction post 4 to calibrate spiral dial gauge 1 before gage frame 5 upper sensor rotor installation shaft or torquer rotor installation shaft radial dimension, guarantee to measure accurately;
(4) resupination framework part 5, first gauge head fixed block 3 and the second side head fixed block 2 are contacted with rotor sensor installation shaft 52, torquer rotor installation shaft 51 cylindrical respectively, read installation shaft radial dimension according to spiral dial gauge 1 index, repetitive measurement is averaged;
Known by test result, rotor sensor installation shaft diameter is respectively Φ 27.501mm, Φ 27.501mm, Φ 27.502mm, Φ 27.502mm, Φ 27.501mm, Φ 27.5015mm, adopt the mode that repetitive measurement is averaged, measurement result is Φ 27.5013mm.
Embodiment 2
As shown in Figure 2, the FRAME COMPONENTS high precision online measuring device of the present embodiment, comprises high-precision spiral dial gauge 1, first gauge head fixed block 3, second gauge head fixed block 2 and check and correction post 4.
The tested part of FRAME COMPONENTS 5 to be measured is the spacing of left and right end face and center pit, and left and right end face and center pit distance are 14.25 ± 0.002mm.
First gauge head fixed block 3 is hemisphere according to test side shape, and hemisphere adopts Hardmetal materials, and hemispherical diameter is Φ 10mm, five cross section circularity are less than 0.002mm, surfaceness is less than Ra0.05, and hemispherical plane requires that flatness is less than 0.001mm, Rockwell's hardness HRC55-60;
Second gauge head fixed block 2 is according to being right cylinder, and right cylinder uses Hardmetal materials, and diameter is Φ 10mm, requires that cylindricity is less than 0.001mm, and the both ends of the surface depth of parallelism is less than 0.001mm, and surfaceness is less than Ra0.05, Rockwell's hardness HRC50-60;
Check and correction post 4 is hard alloy columnar, and surface smoothness is less than Ra0.002mm, and cylindricity is less than 0.005mm, and length is 10mm, and diameter is Φ 10mm;
First gauge head fixed block 3 is arranged on spiral dial gauge 1 and fixes rod end, is used for contacting with framework inner chamber circular hole face during measurement;
Second gauge head fixed block 2 is arranged on the movable rod end of spiral dial gauge 1, is used for contacting with frame plane face during measurement.
The FRAME COMPONENTS high precision online measuring method of the present embodiment, for the axial distance between gage frame part right side and inner chamber circular hole, step is:
(1) need the large cylindrical 53,54 of finish turning two before gyro gimbal part 5 right side finishing, ensure gyro gimbal part 5 cylindrical consistance 0.002mm, right alignment 0.001mm;
(2) one of FRAME COMPONENTS 5 large cylindrical 54 adopts frock 7 to clamp, and the large cylindrical in the processed side of centering is to ensure that two cylindrical axis coaxle degree are within 0.003mm; Then gyro gimbal part right side is processed;
(3) use check and correction post 4 to calibrate spiral dial gauge 1 before measuring, guarantee to measure accurately;
(4) make the first gauge head fixed block 3 contact with the center pit face of cylinder, right side respectively with the second side head fixed block 2, read according to spiral dial gauge 1 index and install axial dimension, repetitive measurement is averaged.
Known by test result, framework 5 right side and center pit cylindrical axes are to being of a size of 14.252mm, and 14.2515mm, 14.252mm, 14.252mm, 14.2525mm, 14.252mm, adopt the mode that repetitive measurement is averaged, measurement result is 14.252mm.
Gyro gimbal part high-precision measurement mechanism of the present invention by increase by two gauge head fixed blocks, can the precision (0.001mm) that namely realizes on lathe FRAME COMPONENTS of the online precision measurement of implementation framework part detect.The repeatedly centering of part on lathe and on three-dimensional weigh-bridge and clamping time are saved in the on-line measurement of gyro gimbal part high-precision, measure efficiency and can improve 3-5 doubly.
The unspecified part of the present invention belongs to general knowledge as well known to those skilled in the art.
Claims (7)
1. a gyro gimbal part high-precision on-line measurement device, it is characterized in that, comprise spiral dial gauge (1) that precision is more than 0.001m, the first gauge head fixed block (3), the second gauge head fixed block (2) and check and correction post (4);
First gauge head fixed block (3) is right cylinder or hemisphere, and material is wimet; Surfaceness is less than Ra0.05, hardness HRC55-60;
Second gauge head fixed block (2) is right cylinder, and material is wimet, and cylindricity is less than 0.001mm, and the both ends of the surface depth of parallelism is less than 0.001mm, and surfaceness is less than Ra0.05, hardness HRC50-60;
Check and correction post is right cylinder (4), and material is wimet, and surfaceness is less than Ra0.002mm, and cylindricity is less than 0.005mm, and length is 10mm-35mm, and diameter is Φ 8-Φ 10mm;
First gauge head fixed block (3) is arranged on the fixing rod end of spiral dial gauge (1), and the second gauge head fixed block (2) is arranged on the movable rod end of spiral dial gauge;
After the tested part of gyro gimbal part machines, adjustable screw dial gauge (1) makes the first gauge head fixed block (3) and the second gauge head fixed block (2) clamping check and correction post (4), completes spiral dial gauge (1) check and correction; Adjustable screw dial gauge (1) makes the first gauge head fixed block (3) and the tested part of the second gauge head fixed block (2) clamping gyro gimbal part, obtains the tested portion size of gyro gimbal part.
2. a kind of gyro gimbal part high-precision on-line measurement device according to claim 1, it is characterized in that: when the tested part of described gyro gimbal part is that diameter is greater than 25mm, when axial length is less than the face of cylinder of 2mm, first gauge head fixed block (3) is right cylinder, first gauge head fixed block (3) cylindricity is less than 0.001mm, and the depth of parallelism of both ends of the surface is less than 0.001mm.
3. a kind of gyro gimbal part high-precision on-line measurement device according to claim 1, it is characterized in that: when the tested portion size of described gyro gimbal part is the distance between FRAME COMPONENTS left or right end face and inner chamber circular hole, first gauge head fixed block (3) is hemisphere, hemisphere five cross section circularity are less than 0.002mm, and the flatness of hemispherical plane is less than 0.001mm.
4. a gyro gimbal part high-precision on-line measurement, is characterized in that: length and the diameter of selecting check and correction post according to the length of the tested part of gyro gimbal part.
5. utilize the gyro gimbal part high-precision on-line measurement device described in claim 1 to carry out the method for on-line measurement as follows: to it is characterized in that, comprise the steps:
(1) process the tested part of gyro gimbal part, measure requirement to ensure to meet;
(2) adjustable screw dial gauge (1) makes the first gauge head fixed block (3) and the second gauge head fixed block (2) clamping check and correction post (4), completes spiral dial gauge (1) check and correction;
(3) adjustable screw dial gauge (1) makes the first gauge head fixed block (3) and the tested part of the second gauge head fixed block (2) clamping gyro gimbal part, obtains this tested portion size of gyro gimbal part measured according to spiral dial gauge (1) reading;
(4) repeat step (3) and obtain repetitive measurement value, be averaging by repetitive measurement value and obtain the final tested portion size of gyro gimbal part.
6. method according to claim 5, it is characterized in that, when the tested portion size of described gyro gimbal part be rotor sensor or torquer rotor installation shaft time, first gauge head fixed block (3) is right cylinder, first gauge head fixed block (3) cylindricity is less than 0.001mm, and the depth of parallelism of both ends of the surface is less than 0.001mm; Described step (one) be specially: the center hole of lappingout rotor sensor and torquer rotor installation shaft, ensure gyro gimbal part outer and top between right alignment be 0.001mm; Two are adopted toply to hold mode processed sensor rotor installation shaft and torquer rotor installation shaft, to ensure that two installation axis right alignmenies are within 0.003mm.
7. method according to claim 5, it is characterized in that, when the tested portion size of described gyro gimbal part is the distance between FRAME COMPONENTS left or right end face and inner chamber circular hole, first gauge head fixed block (3) is for being hemisphere, hemisphere five cross section circularity are less than 0.002mm, and the flatness of hemispherical plane is less than 0.001mm; Described step (one) be specially: the large cylindrical of finish turning gyro gimbal part (5) two, ensures gyro gimbal part (5) cylindrical consistance 0.002mm, right alignment 0.001mm; The large cylindrical of gyro gimbal part (5) adopts frock (7) clamping, and another large cylindrical of centering, to ensure that two cylindrical axis coaxle degree are within 0.003mm, then processes gyro gimbal part left or right end face.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201510219974.3A CN105157500A (en) | 2015-04-30 | 2015-04-30 | Gyroscope frame part high-precision online measuring device and method |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201510219974.3A CN105157500A (en) | 2015-04-30 | 2015-04-30 | Gyroscope frame part high-precision online measuring device and method |
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| CN105157500A true CN105157500A (en) | 2015-12-16 |
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| CN201510219974.3A Pending CN105157500A (en) | 2015-04-30 | 2015-04-30 | Gyroscope frame part high-precision online measuring device and method |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107138916A (en) * | 2017-04-20 | 2017-09-08 | 西安北方光电科技防务有限公司 | A kind of method for improving the Thin-wall Aluminum Parts machining accuracy for gyro gimbal |
| CN112556609A (en) * | 2020-10-29 | 2021-03-26 | 北京航天控制仪器研究所 | Batch detection device for frame workpieces |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US2344498A (en) * | 1942-12-22 | 1944-03-21 | Coward William Harvey | Micrometer |
| CN2166411Y (en) * | 1993-04-24 | 1994-05-25 | 天津起重设备总厂 | Special globe shape measuring head micrometer |
| CN101614512A (en) * | 2009-08-13 | 2009-12-30 | 沈阳飞机工业（集团）有限公司 | Multifunctional digital micrometer |
| CN201748875U (en) * | 2009-09-09 | 2011-02-16 | 孙生强 | Multipurpose outside micrometer |
| CN202083296U (en) * | 2011-06-15 | 2011-12-21 | 株洲精工硬质合金有限公司 | Micrometer for measuring external diameter of breakable member |
-
2015
- 2015-04-30 CN CN201510219974.3A patent/CN105157500A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US2344498A (en) * | 1942-12-22 | 1944-03-21 | Coward William Harvey | Micrometer |
| CN2166411Y (en) * | 1993-04-24 | 1994-05-25 | 天津起重设备总厂 | Special globe shape measuring head micrometer |
| CN101614512A (en) * | 2009-08-13 | 2009-12-30 | 沈阳飞机工业（集团）有限公司 | Multifunctional digital micrometer |
| CN201748875U (en) * | 2009-09-09 | 2011-02-16 | 孙生强 | Multipurpose outside micrometer |
| CN202083296U (en) * | 2011-06-15 | 2011-12-21 | 株洲精工硬质合金有限公司 | Micrometer for measuring external diameter of breakable member |
Non-Patent Citations (2)
| Title |
|---|
| 杨武成 等: "《互换性与技术测量实验指导书（含实验报告）》", 30 April 2009, 西安电子科技大学出版社 * |
| 王健石: "《机械加工常用量具、量仪数据速查手册》", 30 April 2006, 机械工业出版社 * |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107138916A (en) * | 2017-04-20 | 2017-09-08 | 西安北方光电科技防务有限公司 | A kind of method for improving the Thin-wall Aluminum Parts machining accuracy for gyro gimbal |
| CN107138916B (en) * | 2017-04-20 | 2019-04-26 | 西安北方光电科技防务有限公司 | A method of improving the Thin-wall Aluminum Parts machining accuracy for being used for gyro gimbal |
| CN112556609A (en) * | 2020-10-29 | 2021-03-26 | 北京航天控制仪器研究所 | Batch detection device for frame workpieces |
| CN112556609B (en) * | 2020-10-29 | 2023-02-03 | 北京航天控制仪器研究所 | Batch detection device for frame workpieces |
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