CN114264270A - High-precision measurement method for coaxiality of large-span split structure - Google Patents
High-precision measurement method for coaxiality of large-span split structure Download PDFInfo
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Abstract
The invention relates to a high-precision measurement method for coaxiality of a large-span split structure. The requirement of large span coaxiality and high precision is met, the problem that the connected antenna array surface is damaged due to the fact that the rotation axes at the two ends of the automatic attitude adjusting equipment are not coaxial is effectively solved, the antenna array surface is safely and stably produced on the automatic attitude adjusting equipment, accordingly, the major quality problem and the economic loss of products are avoided, and the automatic attitude adjusting equipment has a high technical application value and a high economic value.
Description
Technical Field
The invention relates to a method for measuring coaxiality, in particular to a method for measuring the coaxiality of a large-span split structure with high precision.
Background
With the continuous progress of radar technology, the modern phased array radar develops towards the direction of structural size lightness and thinness and function high integration, and the antenna array surface of the phased array radar has the characteristics of large caliber and high precision. The antenna array surface equipment is large in quantity and high in density, a large number of electronic components and interconnected cables are contained in the antenna array surface equipment, and the assembling difficulty of the antenna array surface is greatly increased. Meanwhile, the current radar product is fast in iteration updating and short in development period, the assembly period allocated to the antenna array surface is further compressed, the production rhythm is accelerated particularly for the radars produced in batches, and new higher requirements are provided for efficient assembly of the antenna array surface.
In order to realize the efficient assembly of the antenna array surface, on the premise of optimal process flow, the proper posture of the antenna array surface is selected according to the change of an assembly object so as to achieve the most comfortable ergonomics. For this purpose, an automatic posture adjusting device is proposed, which is connected with two ends of an antenna array surface in the length direction of the antenna array surface, and realizes the posture change of the antenna array surface through the rotation of a rotating shaft of the automatic posture adjusting device. Practice proves that the automatic posture adjusting equipment can greatly improve the assembly efficiency of the antenna array surface, but because the split structure is large in span at two ends, the span can reach tens of meters, the problem that the coaxiality of rotating shafts at two ends is large exists in the building process, the antenna array surface is easily twisted in the subsequent rotating process, and the framework of the antenna array surface is seriously damaged, so that the great quality problem and the economic loss are caused. Therefore, a method for measuring the coaxiality of the large-span split structure with high precision is needed to be invented.
Disclosure of Invention
The invention provides a high-precision measurement method for coaxiality of a large-span split structure, aiming at the problems. The method is used for solving the problem that the coaxiality of a large-span split structure similar to automatic posture adjusting equipment is difficult to meet the requirement of high precision, so that the connected antenna array surface is damaged, and the safe and stable production of the antenna array surface on the automatic posture adjusting equipment is realized.
In order to realize the purpose of the invention, the fixing technical scheme is as follows:
a high-precision measurement method for coaxiality of a large-span split structure comprises an auxiliary measurement device serving as a measurement reference, wherein the top of the auxiliary measurement device is provided with two mutually vertical auxiliary measurement reference surfaces, and the method comprises the following steps:
1) building a driving end and a driven end of the automatic posture adjusting equipment, and installing an auxiliary measuring device to the driving end and the driven end of the automatic posture adjusting equipment;
2) adjusting the verticality requirement of the two auxiliary measuring reference surfaces to be 0.02 mm; the bottom plate is fixedly connected with a base of the equipment, and the upright posts are used for elevating the top plate, so that subsequent calibration and measurement of a reference surface are facilitated;
3) the adjusting reference surface is parallel to and equidistant from the rotation axis;
4) leveling a horizontal reference surface;
5) accurately calibrating the coaxiality of the driving end and the driven end;
6) and after the coaxiality of the rotation axes at the two ends of the automatic attitude adjusting equipment meets the requirement, hoisting the antenna array surface to fall into the equipment, and connecting and fixing the antenna array surface.
Further, the reference plane is adjusted to be parallel to the rotation axis in the step 3, the reference plane and the rotation axis are equidistant, the measuring device is installed at corresponding positions of the driving end and the driven end of the automatic posture adjusting equipment, the flexible three-coordinate measuring instrument is adopted for measuring on the basis of the rotation axis of the driving end, the two auxiliary reference planes are enabled to be parallel to the rotation axis through adjustment, and measuring data are recorded; and measuring by using a flexible three-coordinate measuring instrument according to the measurement data of the reference surface of the driving end measuring device relative to the rotation axis, and adjusting to enable the parameters of the auxiliary measurement reference surface of the driven end relative to the rotation axis to be consistent with those of the driving end.
Further, the leveling horizontal reference surface in the step 4 is that a close-image level meter is adopted to measure the horizontal reference surfaces of the driving end and the driven end, and the horizontal reference surfaces at the two ends are made to be horizontal and the levelness is controlled within 5 ″ by adjusting an adjusting screw rod at the bottom of the base and the like.
Further, the coaxiality of the driving end and the driven end is accurately calibrated in the step 5, a moving target ball collects a plurality of points on the reference surfaces of the measuring devices at the two ends to perform fitting plane, and the height difference of the horizontal reference surface and the misalignment amount of the vertical reference surface are calculated in a fitting mode; according to the measurement deviation result, the driven end is adjusted by taking the driving end as a reference, so that the two ends tend to be consistent as much as possible; re-measuring the height difference of the horizontal reference surfaces at the two ends and the misalignment amount of the vertical reference surface to control the deviation to be 0.05 mm; and measuring the coaxiality of the intersecting lines of the reference surfaces of the driving end and the driven end.
Further, after the coaxiality of the rotation axes at the two ends of the automatic posture adjusting equipment meets the requirement, the antenna array surface 3 is hoisted and dropped into the equipment, and is connected and fixed.
The high-precision measurement method for the coaxiality of the large-span split structure realizes the high-precision requirement of the large-span coaxiality, and effectively solves the problem that the connected antenna array surface is damaged due to the fact that the rotation axes at the two ends of the automatic attitude adjusting equipment are not coaxial, so that the major quality problem and the economic loss of products are avoided, and the high-precision measurement method has high technical application value and economic value.
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Drawings
1. FIG. 1 is a schematic structural diagram of a main body of an automatic posture adjusting device of the present invention;
2. FIG. 2 is a schematic view of an auxiliary measuring device according to the present invention;
3. FIG. 3 is a schematic view of the auxiliary measuring device of the present invention mounted to an equipment base;
4. FIG. 4 is a schematic view of the laser tracker of the present invention accurately calibrating both ends of the rotation axis coaxiality;
5. FIG. 5 is a schematic view of the hoisting adapter of the present invention;
6. fig. 6 is a schematic diagram of the automatic posture adjustment device with the antenna array surface falling.
Description of reference numerals: 1. an active end; 2. a driven end; 3. an antenna array plane; 4. an auxiliary measuring device; 5. a laser tracker; 6. hoisting the adapter device; 7. a front connecting device; 8. and a rear connecting device.
Detailed Description
The following detailed description of embodiments of the invention refers to the accompanying drawings.
In the invention, the automatic posture adjusting equipment consists of a driving end 1 and a driven end 2, an antenna array surface 3 is driven to rotate by the rotation of a motor of the driving end 1, the posture adjustment of the connected antenna array surface 3 is realized, and the structural layout is shown in figure 1; when the equipment is built, the position of the automatic posture adjusting equipment is fixed firstly, then the antenna array surface 3 is hoisted to be connected with the equipment, if rotating shafts at two ends of the automatic posture adjusting equipment are not coaxial, the antenna array surface 3 is easily twisted in the rotating process, and the framework of the antenna array surface is seriously damaged, so that the serious quality problem and the economic loss are caused; in order to realize the high-precision requirement of the coaxiality of the rotating shafts at the two ends of the automatic posture adjusting equipment, an auxiliary measuring device which meets the design requirement is designed as a measuring reference, then a flexible three-coordinate instrument is adopted to calibrate the measuring reference to be parallel to and equidistant to the rotating shafts, and finally a method for accurately calibrating the measuring reference at the two ends by adopting a laser tracker is adopted, so that the installation and adjustment of the automatic posture adjusting equipment are efficiently guided, and the high-precision requirement of the coaxiality of the rotating shafts at the two ends is effectively ensured;
as shown in fig. 2, an auxiliary measuring device 4 is designed as a measuring reference, the top of the auxiliary measuring device 4 is two mutually perpendicular auxiliary measuring reference surfaces, and the perpendicularity requirement of the two reference surfaces is 0.02 mm; the bottom plate is fixedly connected with a base of the device, and the upright posts are used for elevating the top plate, so that subsequent calibration and measurement on a reference surface are facilitated. The method comprises the following steps:
1) building a driving end 1 and a driven end 2 of the automatic posture adjusting equipment, as shown in figure 1; mounting the auxiliary measuring device to a driving end 1 and a driven end 2 of the automatic posture adjusting equipment;
2) adjusting the verticality requirement of the two auxiliary measuring reference surfaces to be 0.02 mm; the bottom plate is fixedly connected with a base of the equipment, and the upright posts are used for elevating the top plate, so that subsequent calibration and measurement of a reference surface are facilitated;
3) the adjusting reference surface is parallel to and equidistant from the rotation axis;
4) leveling a horizontal reference surface;
5) accurately calibrating the coaxiality of the driving end and the driven end by using a laser tracker;
6) and after the coaxiality of the rotation axes at the two ends of the automatic posture adjusting equipment meets the requirement, hoisting the antenna array surface 3 into the equipment, and connecting and fixing the equipment.
Further, the adjustment reference plane in step 3 is parallel to the rotation axis and equidistant, and the measuring device is mounted to the driving end 1 and the driven end 2, as shown in fig. 3. In order to realize that the reference surfaces at the two ends are parallel to and equidistant from the rotation axis, a flexible three-coordinate instrument is adopted to measure the position relation between the reference surfaces and the rotation axis so as to guide the adjustment of the measuring device. The specific method comprises the following steps: the measuring device is arranged at the corresponding positions of a driving end 1 and a driven end 2 of the automatic posture adjusting equipment, a flexible three-coordinate instrument is adopted for measuring on the basis of the rotation axis of the driving end 1, two auxiliary reference surfaces are enabled to be parallel to the rotation axis through adjustment, and measuring data are recorded; according to the measurement data of the reference surface of the measuring device of the driving end 1 relative to the rotation axis, a flexible three-coordinate measuring instrument is adopted for measurement, and the parameters of the auxiliary measurement reference surface of the driven end 2 relative to the rotation axis are made to be consistent with those of the driving end 1 through adjustment.
Setting the distance between the driving end and the driven end according to the overall dimension of the antenna array surface; adjusting a screw at the bottom of the base, and adjusting the height of a rotation center of the equipment to meet the requirement that an operator can comfortably carry out mechanical mounting and electrical mounting work in both a vertical state and a horizontal state of an antenna array surface;
further, the leveling horizontal reference surface in the step 4 is that a close-image level meter is adopted to measure the horizontal reference surfaces of the driving end and the driven end, and the horizontal reference surfaces at the two ends are made to be horizontal and the levelness is controlled within 5 ″ by adjusting an adjusting screw rod at the bottom of the base and the like.
Further, the coaxiality of the driving end 1 and the driven end 2 is accurately calibrated in the step 5, and after the parameters of the reference surfaces at the two ends relative to the rotation axis are adjusted to be consistent, the intersection line of the reference surfaces is used for replacing the rotation axis to perform coaxial measurement. Theoretically, the intersecting lines of the reference planes are coaxial, and the rotating axes at the two ends are coaxial. The position layout of the laser tracker calibration is shown in fig. 4, and the specific calibration measurement method is as follows: a plurality of points are collected on the reference surfaces of the measuring devices at the two ends by the movable target ball to carry out fitting on a plane, and the height difference of the horizontal reference surface and the misalignment amount of the vertical reference surface are calculated in a fitting manner; according to the measurement deviation result, the driven end is adjusted by taking the driving end 1 as a reference, so that the two ends tend to be consistent as much as possible; re-measuring the height difference of the horizontal reference surfaces at the two ends and the misalignment amount of the vertical reference surface to control the deviation to be 0.05 mm; and measuring the coaxiality of the intersecting lines of the reference surfaces of the driving end 1 and the driven end 2.
Hoisting interfaces are generally reserved at two ends of a large antenna array surface, in order to improve the flexibility of equipment, a hoisting switching device is designed between the antenna array surface 3 and a rotary connecting device for transition, and different antenna array surfaces 3 can be efficiently connected with the equipment only through different hoisting switching devices, as shown in fig. 5; after the accurate calibration is carried out until the coaxiality of the rotation axes at the two ends of the automatic attitude adjusting equipment meets the requirement, the antenna array surface 3 is hoisted and dropped into the equipment, and is connected and fixed, and the front connecting device of the rotary connecting device and the two ends of the antenna array surface 3 are assembled into a whole, as shown in fig. 6; the hoisting antenna array surface 3 and the front connecting device fall into the rear connecting devices at two ends of the automatic posture adjusting equipment and are tightly connected by a pressing plate.
So far, the technical solutions of the present invention have been described in connection with the preferred embodiments, but it is easily understood by those skilled in the art that the scope of the present invention is obviously not limited to these specific embodiments. Equivalent changes or substitutions of related technical features can be made by those skilled in the art without departing from the principle of the invention, and the technical scheme after the changes or substitutions can fall into the protection scope of the invention.
Claims (5)
1. A high-precision measurement method for coaxiality of a large-span split structure comprises an auxiliary measurement device serving as a measurement reference, wherein the top of the auxiliary measurement device is provided with two mutually vertical auxiliary measurement reference surfaces, and the method comprises the following steps:
1) building a driving end and a driven end of the automatic posture adjusting equipment, and installing an auxiliary measuring device to the driving end and the driven end of the automatic posture adjusting equipment;
2) adjusting the verticality of the two auxiliary measuring reference surfaces to be 0.02 mm; connecting and fixing the bottom plate and a base of the equipment, and erecting a top plate by using the upright posts;
3) the adjusting reference surface is parallel to and equidistant from the rotation axis;
4) leveling a horizontal reference surface;
5) accurately calibrating the coaxiality of the driving end and the driven end;
6) and after the coaxiality of the rotation axes at the two ends of the automatic attitude adjusting equipment meets the requirement, hoisting the antenna array surface to fall into the equipment, and connecting and fixing the antenna array surface.
2. The method for high-precision measurement of the coaxiality of the large-span split structure according to claim 1, wherein the method comprises the following steps: adjusting the reference surfaces to be parallel to the rotation axis and have equal distance, installing a measuring device at corresponding positions of a driving end and a driven end of the automatic posture adjusting equipment, measuring by adopting a flexible three-coordinate instrument based on the rotation axis of the driving end, adjusting to enable the two auxiliary reference surfaces to be parallel to the rotation axis, and recording measurement data; and measuring by using a flexible three-coordinate measuring instrument according to the measurement data of the reference surface of the driving end measuring device relative to the rotation axis, and adjusting to enable the parameters of the auxiliary measurement reference surface of the driven end relative to the rotation axis to be consistent with those of the driving end.
3. The method for high-precision measurement of the coaxiality of the large-span split structure according to claim 1, wherein the method comprises the following steps: the leveling horizontal reference surface in the step 4 is that a close image level meter is adopted to measure the horizontal reference surfaces of the driving end and the driven end, and the horizontal reference surfaces at the two ends are made to be horizontal by adjusting screws at the bottom of the base and the like, and the levelness is controlled within 5 ″.
4. The method for high-precision measurement of the coaxiality of the large-span split structure according to claim 1, wherein the method comprises the following steps: in the step 5, the coaxiality of the driving end and the driven end is accurately calibrated, a plurality of points are collected on the reference surfaces of the measuring devices at the two ends by the moving target ball to carry out fitting on a plane, and the height difference of the horizontal reference surface and the misalignment amount of the vertical reference surface are calculated in a fitting manner; according to the measurement deviation result, the driven end is adjusted by taking the driving end as a reference, so that the two ends tend to be consistent as much as possible; re-measuring the height difference of the horizontal reference surfaces at the two ends and the misalignment amount of the vertical reference surface to control the deviation to be 0.05 mm; and measuring the coaxiality of the intersecting lines of the reference surfaces of the driving end and the driven end.
5. The method for high-precision measurement of the coaxiality of the large-span split structure according to claim 1, wherein the method comprises the following steps: after the coaxiality of the rotation axes at the two ends of the automatic posture adjusting equipment meets the requirement, the antenna array surface 3 is hoisted and dropped into the equipment and is connected and fixed.
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114719790A (en) * | 2022-04-08 | 2022-07-08 | 包头钢铁（集团）有限责任公司 | Method for adjusting horizontal straightness of split equipment by using laser tracker |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN108036758A (en) * | 2017-11-17 | 2018-05-15 | 北京理工大学 | One kind is suitable for the detection of aero-engine casing concentricity and method of adjustment |
| CN108955629A (en) * | 2018-08-03 | 2018-12-07 | 中国电子科技集团公司第三十八研究所 | A kind of antenna attitude accuracy measurement system and measurement method |
| CN113381186A (en) * | 2021-06-24 | 2021-09-10 | 中国电子科技集团公司第十四研究所 | Coaxiality adjusting method for large-span split type automatic posture adjusting equipment |
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- 2021-12-26 CN CN202111606605.1A patent/CN114264270A/en active Pending
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108036758A (en) * | 2017-11-17 | 2018-05-15 | 北京理工大学 | One kind is suitable for the detection of aero-engine casing concentricity and method of adjustment |
| CN108955629A (en) * | 2018-08-03 | 2018-12-07 | 中国电子科技集团公司第三十八研究所 | A kind of antenna attitude accuracy measurement system and measurement method |
| CN113381186A (en) * | 2021-06-24 | 2021-09-10 | 中国电子科技集团公司第十四研究所 | Coaxiality adjusting method for large-span split type automatic posture adjusting equipment |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114719790A (en) * | 2022-04-08 | 2022-07-08 | 包头钢铁（集团）有限责任公司 | Method for adjusting horizontal straightness of split equipment by using laser tracker |
| CN114719790B (en) * | 2022-04-08 | 2024-01-30 | 包头钢铁（集团）有限责任公司 | Method for adjusting horizontal straightness of split equipment by using laser tracker |
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