CN113008899A - Method for pre-screening laser gyroscope clamping jackscrew - Google Patents
Method for pre-screening laser gyroscope clamping jackscrew Download PDFInfo
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- CN113008899A CN113008899A CN202110214151.7A CN202110214151A CN113008899A CN 113008899 A CN113008899 A CN 113008899A CN 202110214151 A CN202110214151 A CN 202110214151A CN 113008899 A CN113008899 A CN 113008899A
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N21/00—Investigating or analysing materials by the use of optical means, i.e. using sub-millimetre waves, infrared, visible or ultraviolet light
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- G01N21/88—Investigating the presence of flaws or contamination
- G01N21/8803—Visual inspection
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01B—MEASURING LENGTH, THICKNESS OR SIMILAR LINEAR DIMENSIONS; MEASURING ANGLES; MEASURING AREAS; MEASURING IRREGULARITIES OF SURFACES OR CONTOURS
- G01B11/00—Measuring arrangements characterised by the use of optical techniques
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01B—MEASURING LENGTH, THICKNESS OR SIMILAR LINEAR DIMENSIONS; MEASURING ANGLES; MEASURING AREAS; MEASURING IRREGULARITIES OF SURFACES OR CONTOURS
- G01B11/00—Measuring arrangements characterised by the use of optical techniques
- G01B11/28—Measuring arrangements characterised by the use of optical techniques for measuring areas
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01L—MEASURING FORCE, STRESS, TORQUE, WORK, MECHANICAL POWER, MECHANICAL EFFICIENCY, OR FLUID PRESSURE
- G01L3/00—Measuring torque, work, mechanical power, or mechanical efficiency, in general
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Abstract
The invention relates to a method for pre-screening a laser gyroscope clamping jackscrew, which comprises the following steps: preparing a jackscrew screening tool; the jackscrew screening tool comprises a tool lower part, a tool upper part and quartz glass; the lower part of the tool is of a grid groove-shaped structure, the frame and the inner cross support beam of the tool are higher than the plane of the groove, the upper part of the tool is of a flat structure and is fixed on the lower part of the tool, and threaded holes which are arranged in a matrix manner are arranged in the area, corresponding to the groove on the lower part of the tool, on the upper part of the tool and are used for fixing a ball head jackscrew; quartz glass is arranged in the groove; step two: determining a torque set value of the jackscrew pre-screening; step three: and (4) using the jackscrew screening tool and the determined set value of the moment of the jackscrew pre-screening to complete screening of the bulb jackscrew. The invention can complete the workload of the original method for two days only in 4-5 hours, and can meet the requirement of pre-screening pre-tightening force of the jackscrew. The method lays a processing foundation for the development of the laser gyroscope to low cost and high precision.
Description
Technical Field
The invention relates to a method for grabbing and clamping jackscrews for pre-screening by a laser gyroscope, and belongs to the technical field of laser gyroscopes.
Background
The laser gyro is a high-precision inertia sensitive instrument, has the advantages of short starting time, large dynamic range, high reliability, long service life, digital output and the like, and is an ideal sensor of a new generation of strapdown inertial navigation system with high sensitivity, high precision and large dynamic range.
The laser gyro is a ring-shaped laser resonant cavity consisting of a square cavity, 1 cathode, 2 anodes, 2 spherical mirrors and 2 plane pieces. The stability of the light path is one of the important factors influencing the long-term stability of the laser gyro. The main function of the grabbing clamp is to finely adjust the length of a resonant cavity of the laser gyroscope, the length of the resonant cavity of the laser gyroscope is changed due to the change of factors such as environmental temperature, internal stress and the like in the working process of the laser gyroscope, the grabbing clamp adhered with piezoelectric ceramics is needed to stabilize the length of the resonant cavity of the laser gyroscope so as to stabilize output, and the length of the resonant cavity of the laser gyroscope is controlled through a spherical mirror with an elastic function.
The laser gyro is swept by adjusting a ball head jackscrew on the grabbing clamp so as to achieve the effect of stabilizing a light path; the screening of the ball head jackscrew plays a vital role in sweeping the laser gyro and stabilizing the light path.
The method comprises the steps of turning on a sweep generator, a computer and a 300V power supply, entering a gyro mold sweeping module, selecting a technical gyro, lighting the gyro, installing the cleaned top wire to be screened on a gyro grab card, and slowly adjusting the top wire by a screwdriver to enable the top wire to prop against a spherical mirror to achieve the required pre-tightening force.
Disclosure of Invention
The technical problem to be solved by the invention is as follows: the defects in the prior art are overcome, the method for pre-screening the clamping jackscrew of the laser gyroscope is provided, and the technical problems of high cost, long time consumption and high personnel technical requirements of the existing method are solved.
The technical solution of the invention is as follows:
a method for pre-screening a laser gyroscope clamping jackscrew comprises the following steps:
the method comprises the following steps: preparing a jackscrew screening tool;
the jackscrew screening tool comprises a tool lower part (1), a tool upper part (2) and quartz glass (4); the lower part (1) of the tool is of a grid groove-shaped structure, a frame and an inner cross support beam of the lower part are higher than a groove plane, the upper part (2) of the tool is of a flat structure and is fixed on the lower part (1) of the tool, and threaded holes which are arranged in a matrix mode are formed in the area, corresponding to the groove of the lower part (1), of the upper part (2) of the tool and are used for fixing the ball head jackscrew (3); quartz glass (4) is arranged in the groove;
step two: determining a torque set value of the jackscrew pre-screening;
step three: and (4) using the jackscrew screening tool and the determined set value of the moment of the jackscrew pre-screening to complete screening of the bulb jackscrew.
Furthermore, the quartz glass (4) has a plurality of pieces, the number of the quartz glass (4) placed in each groove of the lower part (1) of the tool is the same, and the quartz glass (4) is circular, square or oval.
Furthermore, the flatness of the upper bottom surface and the lower bottom surface of the quartz glass (4) is not more than 0.005 mm.
Further, the cleaned quartz glass (4) is adhered to the inner surface of the groove of the lower part (1) of the tool through glue, the upper surface of the quartz glass (4) is cleaned through acetone, the flatness of the contact between the lower part (1) of the tool and the upper part (2) of the tool is not more than 0.01mm, and the cleaned lower part (1) of the tool is connected with the upper part (2) of the tool through screws.
Furthermore, the flatness of the contact surface of the groove of the lower part (1) of the tool and the quartz glass (4) is not more than 0.005 mm.
Further, the lower part (1) and the upper part (2) of the tool adopt 304 stainless steel or 2Cr 13.
Further, the width of the cross-shaped support beam is set to be 5-10 mm; the depth of the groove does not exceed 2/3 and is not lower than 1/2 of the ball head jackscrew.
Further, the second step of determining the torque value of the top thread pre-screening is specifically performed through the following steps:
step a: when the adjusting ball head jackscrew meets the technical requirement of the process gyro mold sweeping and pre-tightening process, the observation standard under a microscope specifically comprises the following steps:
the process gyroscope is used, the ball head jackscrew is adjusted to meet the requirements of a process gyroscope mold sweeping and pre-tightening process, the scratch condition of the head of the ball head jackscrew is observed under a microscope, the jacking area of the ball head jackscrew is recorded, the scratch condition is observed by adjusting the ball head jackscrew for multiple times, the jacking area is recorded, and the observation standard is obtained after observation and recording: the top flat position has no scratch, the number of the scratch lanes at other positions is not more than 2, the length of the scratch lane is not more than 0.5mm, and the top flat area is 0.07-0.125mm2Within the range;
step b: adjusting a ball head jackscrew on the technical gyro grab clamp by using an electronic torque wrench to enable the ball head jackscrew to reach the mould sweeping pre-tightening requirement, namely observing that the ball head jackscrew is adjusted by the electronic torque wrench under a microscope to reach the observation standard: the scratch-free ball head has the advantages that the scratch-free ball head is not caused at the top flat position, no more than 2 scratch paths are arranged at other positions of the ball head, the length of each scratch path is not more than 0.5mm, and the top flat area is 0.07-0.125mm2Within the range, recording the torque value of the electronic torque wrench;
step c: and c, repeating the step b, adjusting the ball head jackscrew by using the electronic torque wrench for multiple times, and averaging all the obtained torque values of the electronic torque wrench to be used as the torque set value of the electronic torque wrench.
Further, the moment setting value that the jackscrew screening frock and the jack screw of confirming were sieved in advance is used, accomplishes screening bulb jackscrew, specifically is:
80 ball head jackscrews are arranged in threaded holes which are arranged on the upper part (2) of the tool in a matrix manner;
adjusting the mode of the electronic torque wrench, and setting the torque value of the electronic torque wrench as the set value in the second step;
sequentially pre-tightening 80 bulb jackscrews by using an electronic torque wrench, wherein the torque wrench reaches a set value during pre-tightening, so that the bulb jackscrews are screwed into the threaded holes in the lower part (1) of the tool, and the bulbs of the bulb jackscrews are propped against the quartz glass (4);
observing the top flat area of the jackscrew ball head and the condition of no scratch on the surface of the ball head under a microscope, so that no scratch is caused at the top flat position, no more than 2 scratch channels are arranged at other positions of the ball head, the length of each scratch channel is not more than 0.5mm, and the top flat area is 0.07-0.125mm2Within the range, the requirements are met.
Compared with the prior art, the invention has the beneficial effects that:
(1) the invention designs the convenient and operable top wire pre-screening, realizes the rapid pre-screening of the top wire pre-screening on the laser gyro grab clamp, and can complete the rapid pre-screening of 80 top wires in 4-5 hours.
(2) The invention realizes the technical problems of low cost, short time consumption and less personnel demand.
Drawings
FIG. 1 is a schematic structural view of a lower portion of a jackscrew screening tool;
FIG. 2 is a schematic structural diagram of the upper part of a jackscrew screening tool;
fig. 3 is a schematic view of the overall structure of the jackscrew screening tool.
Detailed Description
The following further describes the embodiments of the present invention with reference to the drawings.
The laser gyro is subjected to mould sweeping through adjustment of a ball head jackscrew on the grabbing clamp so as to achieve the effect of light path stabilization. Because the jackscrew is a bulb jackscrew made of soft metal, the jackscrew needs to be pre-screened in order to avoid scratching a spherical mirror because a pit and the like are arranged on the bulb of the jackscrew when the top is installed on the jackscrew, however, the very important point of jackscrew screening is the pretightening force of the jackscrew, the screening of the bulb jackscrew sweeps a laser gyro, and the stability of a light path has a crucial effect.
The method comprises the steps of turning on a sweep generator, a computer and a 300V power supply, entering a gyro mold sweeping module, selecting a technical gyro, lighting the gyro, installing the cleaned top wire to be screened on a gyro grab card, and slowly adjusting the top wire by a screwdriver to enable the top wire to prop against a spherical mirror to achieve the required pre-tightening force. The existing method can meet the requirement of screening jackscrews by sweeping and pre-tightening the process gyroscope, but has the disadvantages of long damage to the gyroscope, long time consumption, high personnel technical requirement and high cost.
In order to improve the production efficiency of the laser gyroscope and reduce the cost, for the screening of important parts of the stable light path of the laser gyroscope and the clamping jackscrew, the prior method can meet the requirement of screening the jackscrew by sweeping and pre-tightening the process gyroscope, but the gyroscope is damaged for a long time, the time consumption is long, the technical requirement of personnel is high, and the cost is high. The method for grabbing and clamping the top wire and pre-screening the top wire of the laser gyroscope solves the technical problem of the existing top wire and pre-screening of the top wire of the gyroscope.
The invention provides a method for pre-screening a laser gyroscope clamping jackscrew, which comprises the following steps:
the method comprises the following steps: preparing a jackscrew screening tool;
as shown in fig. 1, 2 and 3, the jackscrew screening tool comprises a tool lower part 1, a tool upper part 2 and quartz glass 4; the lower part 1 of the tool is of a grid groove-shaped structure, the frame and the inner cross support beam of the lower part are higher than the plane of the groove, the upper part 2 of the tool is of a flat structure and is fixed on the lower part 1 of the tool, and threaded holes which are arranged in a matrix manner are arranged in the area, corresponding to the groove of the lower part 1 of the tool, on the upper part 2 of the tool and are used for fixing the ball head jackscrew 3; quartz glass 4 is arranged in the groove;
the quartz glass 4 has a plurality of pieces, the number of the quartz glass 4 placed in each groove at the lower part 1 of the tool is the same, and the quartz glass 4 is circular, square or oval.
Preferably, the flatness of the upper and lower bottom surfaces of the silica glass 4 is not more than 0.005 mm.
The clean quartz glass 4 is adhered to the inner surface of the groove of the lower part 1 of the tool through glue, the upper surface of the quartz glass 4 is cleaned through acetone, the flatness of the lower part 1 of the tool, which is in contact with the upper part 2 of the tool, is not more than 0.01mm, and the clean lower part 1 of the tool is connected with the upper part 2 of the tool through screws.
The flatness of the contact surface of the groove of the lower part 1 of the tool and the quartz glass 4 is not more than 0.005 mm.
The lower part 1 and the upper part 2 of the tool are made of 304 stainless steel or 2Cr13, and are not easy to deform and rust.
The cross-shaped supporting beam is used for reducing the weight and meeting the supporting strength, and the width of the cross-shaped supporting beam is set to be 5-10 mm; the depth of the groove does not exceed 2/3 and is not lower than 1/2 of the ball head jackscrew.
Step two: determining a torque set value of the jackscrew pre-screening;
the method specifically comprises the following steps:
step a: when the adjusting ball head jackscrew meets the technical requirement of the process gyro mold sweeping and pre-tightening process, the observation standard under a microscope specifically comprises the following steps:
the process gyroscope is used, the ball head jackscrew is adjusted to meet the requirements of a process gyroscope mold sweeping and pre-tightening process, the scratch condition of the head of the ball head jackscrew is observed under a microscope, the jacking area of the ball head jackscrew is recorded, the scratch condition is observed by adjusting the ball head jackscrew for multiple times, the jacking area is recorded, and the observation standard is obtained after observation and recording: the top flat position has no scratch, the number of the scratch lanes at other positions is not more than 2, the length of the scratch lane is not more than 0.5mm, and the top flat area is 0.07-0.125mm2Within the range;
step b: adjusting a ball head jackscrew on the technical gyro grab clamp by using an electronic torque wrench to enable the ball head jackscrew to reach the mould sweeping pre-tightening requirement, namely observing that the ball head jackscrew is adjusted by the electronic torque wrench under a microscope to reach the observation standard: the scratch-free ball head has the advantages that the scratch-free ball head is not caused at the top flat position, no more than 2 scratch paths are arranged at other positions of the ball head, the length of each scratch path is not more than 0.5mm, and the top flat area is 0.07-0.125mm2Within the range, recording the torque value of the electronic torque wrench;
step c: and c, repeating the step b, adjusting the ball head jackscrew by using the electronic torque wrench for multiple times, and averaging all the obtained torque values of the electronic torque wrench to be used as the torque set value of the electronic torque wrench.
Step three: and (4) using the jackscrew screening tool and the determined set value of the moment of the jackscrew pre-screening to complete screening of the bulb jackscrew. The method specifically comprises the following steps:
80 ball head jackscrews are arranged in threaded holes which are arranged on the upper part 2 of the tool in a matrix manner;
adjusting the mode of the electronic torque wrench, and setting the torque value of the electronic torque wrench as the set value in the second step;
sequentially pre-tightening 80 bulb jackscrews by using an electronic torque wrench, wherein the torque wrench reaches a set value during pre-tightening, so that the bulb jackscrews are screwed into the threaded holes in the lower part 1 of the tool, and the bulbs of the bulb jackscrews are propped against the quartz glass 4;
observing the top flat area of the jackscrew ball head and the condition of no scratch on the surface of the ball head under a microscope, so that no scratch is caused at the top flat position, no more than 2 scratch channels are arranged at other positions of the ball head, the length of each scratch channel is not more than 0.5mm, and the top flat area is 0.07-0.125mm2Within the range, the requirements are met.
The invention designs the top wire pre-screening mechanism to ensure that the top wire pre-screening can complete the workload of the original method for two days only for 4 to 5 hours, and can meet the pre-tightening force requirement of the top wire pre-screening. The method lays a processing foundation for the development of the laser gyroscope to low cost and high precision.
Those skilled in the art will appreciate that those matters not described in detail in the present specification are well known in the art.
Claims (9)
1. A method for pre-screening a laser gyroscope clamping jackscrew is characterized by comprising the following steps:
the method comprises the following steps: preparing a jackscrew screening tool;
the jackscrew screening tool comprises a tool lower part (1), a tool upper part (2) and quartz glass (4); the lower part (1) of the tool is of a grid groove-shaped structure, a frame and an inner cross support beam of the lower part are higher than a groove plane, the upper part (2) of the tool is of a flat structure and is fixed on the lower part (1) of the tool, and threaded holes which are arranged in a matrix mode are formed in the area, corresponding to the groove of the lower part (1), of the upper part (2) of the tool and are used for fixing the ball head jackscrew (3); quartz glass (4) is arranged in the groove;
step two: determining a torque set value of the jackscrew pre-screening;
step three: and (4) using the jackscrew screening tool and the determined set value of the moment of the jackscrew pre-screening to complete screening of the bulb jackscrew.
2. The method for pre-screening the laser gyro catching jackscrew according to claim 1, characterized in that: the quartz glass (4) is provided with a plurality of pieces, the number of the quartz glass (4) placed in each groove of the lower part (1) of the tool is the same, and the quartz glass (4) is circular, square or oval.
3. The method for pre-screening the laser gyro catching jackscrew according to claim 2, characterized in that: the flatness of the upper and lower bottom surfaces of the quartz glass (4) is not more than 0.005 mm.
4. The method for pre-screening the laser gyro catching jackscrew according to claim 1, characterized in that: the inner surfaces of the grooves of the lower part (1) of the tool are bonded with the cleaned quartz glass (4) through glue, the upper surface of the quartz glass (4) is cleaned through acetone, the flatness of the contact part of the lower part (1) of the tool and the upper part (2) of the tool is not more than 0.01mm, and the lower part (1) of the tool and the upper part (2) of the tool are connected through screws.
5. The method for pre-screening the laser gyro catching jackscrew according to claim 4, wherein: the flatness of the contact surface between the groove at the lower part (1) of the tool and the quartz glass (4) is not more than 0.005 mm.
6. The method for pre-screening the laser gyro catching jackscrew according to claim 1, characterized in that: the lower part (1) and the upper part (2) of the tool adopt 304 stainless steel or 2Cr 13.
7. The method for pre-screening the laser gyro catching jackscrew according to claim 1, characterized in that: the width of the cross-shaped support beam is set to be 5-10 mm; the depth of the groove does not exceed 2/3 and is not lower than 1/2 of the ball head jackscrew.
8. The method for pre-screening the laser gyro catching jackscrew according to claim 1, characterized in that: the second step of determining the torque value of the top thread pre-screening is specifically carried out through the following steps:
step a: when the adjusting ball head jackscrew meets the technical requirement of the process gyro mold sweeping and pre-tightening process, the observation standard under a microscope specifically comprises the following steps:
the process gyroscope is used, the ball head jackscrew is adjusted to meet the requirements of a process gyroscope mold sweeping and pre-tightening process, the scratch condition of the head of the ball head jackscrew is observed under a microscope, the jacking area of the ball head jackscrew is recorded, the scratch condition is observed by adjusting the ball head jackscrew for multiple times, the jacking area is recorded, and the observation standard is obtained after observation and recording: the top flat position has no scratch, the number of the scratch lanes at other positions is not more than 2, the length of the scratch lane is not more than 0.5mm, and the top flat area is 0.07-0.125mm2Within the range;
step b: adjusting a ball head jackscrew on the technical gyro grab clamp by using an electronic torque wrench to enable the ball head jackscrew to reach the mould sweeping pre-tightening requirement, namely observing that the ball head jackscrew is adjusted by the electronic torque wrench under a microscope to reach the observation standard: the scratch-free ball head has the advantages that the scratch-free ball head is not caused at the top flat position, no more than 2 scratch paths are arranged at other positions of the ball head, the length of each scratch path is not more than 0.5mm, and the top flat area is 0.07-0.125mm2Within the range, recording the torque value of the electronic torque wrench;
step c: and c, repeating the step b, adjusting the ball head jackscrew by using the electronic torque wrench for multiple times, and averaging all the obtained torque values of the electronic torque wrench to be used as the torque set value of the electronic torque wrench.
9. The method for pre-screening the laser gyro catching jackscrew according to claim 1, characterized in that: the method comprises the following steps of using a jackscrew screening tool and a determined jackscrew pre-screening torque set value to complete screening of the bulb jackscrew, and specifically comprises the following steps:
80 ball head jackscrews are arranged in threaded holes which are arranged on the upper part (2) of the tool in a matrix manner;
adjusting the mode of the electronic torque wrench, and setting the torque value of the electronic torque wrench as the set value in the second step;
sequentially pre-tightening 80 bulb jackscrews by using an electronic torque wrench, wherein the torque wrench reaches a set value during pre-tightening, so that the bulb jackscrews are screwed into the threaded holes in the lower part (1) of the tool, and the bulbs of the bulb jackscrews are propped against the quartz glass (4);
observing the top flat area of the jackscrew ball head and the condition of no scratch on the surface of the ball head under a microscope, so that no scratch is caused at the top flat position, no more than 2 scratch channels are arranged at other positions of the ball head, the length of each scratch channel is not more than 0.5mm, and the top flat area is 0.07-0.125mm2Within the range, the requirements are met.
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Citations (7)
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| GB8608771D0 (en) * | 1985-04-10 | 1986-05-14 | Hamamatsu Photonics Kk | Laser gyrosystem |
| CN1603747A (en) * | 2004-11-08 | 2005-04-06 | 金世龙 | Laser gyro light path and path length control mirror |
| CN106342023B (en) * | 2010-03-08 | 2011-11-09 | 中国航空工业第六一八研究所 | A kind of assembled tool of deep camber spherical area and processing method of spherical area of processing |
| CN106507911B (en) * | 2010-08-27 | 2014-04-23 | 中国航空工业第六一八研究所 | Laser gyro is without telescopic shaker mechanism |
| CN106123886A (en) * | 2016-08-23 | 2016-11-16 | 中国航空工业集团公司西安飞行自动控制研究所 | A kind of laser gyro ring resonator beam path alignment device and method |
| CN109084744A (en) * | 2018-09-07 | 2018-12-25 | 中国人民解放军国防科技大学 | Processing method of dynamic locking area of laser gyroscope |
| CN212320731U (en) * | 2020-07-14 | 2021-01-08 | 常悦 | Cavity adjusting mechanism of laser gyroscope |
-
2021
- 2021-02-25 CN CN202110214151.7A patent/CN113008899B/en active Active
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB8608771D0 (en) * | 1985-04-10 | 1986-05-14 | Hamamatsu Photonics Kk | Laser gyrosystem |
| CN1603747A (en) * | 2004-11-08 | 2005-04-06 | 金世龙 | Laser gyro light path and path length control mirror |
| CN106342023B (en) * | 2010-03-08 | 2011-11-09 | 中国航空工业第六一八研究所 | A kind of assembled tool of deep camber spherical area and processing method of spherical area of processing |
| CN106507911B (en) * | 2010-08-27 | 2014-04-23 | 中国航空工业第六一八研究所 | Laser gyro is without telescopic shaker mechanism |
| CN106123886A (en) * | 2016-08-23 | 2016-11-16 | 中国航空工业集团公司西安飞行自动控制研究所 | A kind of laser gyro ring resonator beam path alignment device and method |
| CN109084744A (en) * | 2018-09-07 | 2018-12-25 | 中国人民解放军国防科技大学 | Processing method of dynamic locking area of laser gyroscope |
| CN212320731U (en) * | 2020-07-14 | 2021-01-08 | 常悦 | Cavity adjusting mechanism of laser gyroscope |
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