CN114799746B - Shafting machining method and assembly method of large-span radar turntable - Google Patents
Shafting machining method and assembly method of large-span radar turntable Download PDFInfo
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- CN114799746B CN114799746B CN202210372534.1A CN202210372534A CN114799746B CN 114799746 B CN114799746 B CN 114799746B CN 202210372534 A CN202210372534 A CN 202210372534A CN 114799746 B CN114799746 B CN 114799746B
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- 238000003754 machining Methods 0.000 title claims abstract description 35
- 238000000034 method Methods 0.000 title claims description 24
- 238000012545 processing Methods 0.000 claims abstract description 15
- 238000003672 processing method Methods 0.000 claims abstract description 6
- 238000013461 design Methods 0.000 claims description 7
- 238000003801 milling Methods 0.000 claims description 3
- 230000005484 gravity Effects 0.000 abstract description 7
- 238000004088 simulation Methods 0.000 abstract description 4
- 230000009471 action Effects 0.000 description 4
- 238000010586 diagram Methods 0.000 description 4
- 230000008859 change Effects 0.000 description 2
- 238000005259 measurement Methods 0.000 description 2
- 238000001514 detection method Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000007730 finishing process Methods 0.000 description 1
- 238000000227 grinding Methods 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
- 230000009466 transformation Effects 0.000 description 1
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23P—METAL-WORKING NOT OTHERWISE PROVIDED FOR; COMBINED OPERATIONS; UNIVERSAL MACHINE TOOLS
- B23P15/00—Making specific metal objects by operations not covered by a single other subclass or a group in this subclass
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01C—MEASURING DISTANCES, LEVELS OR BEARINGS; SURVEYING; NAVIGATION; GYROSCOPIC INSTRUMENTS; PHOTOGRAMMETRY OR VIDEOGRAMMETRY
- G01C1/00—Measuring angles
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02A—TECHNOLOGIES FOR ADAPTATION TO CLIMATE CHANGE
- Y02A90/00—Technologies having an indirect contribution to adaptation to climate change
- Y02A90/10—Information and communication technologies [ICT] supporting adaptation to climate change, e.g. for weather forecasting or climate simulation
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- Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Radar, Positioning & Navigation (AREA)
- Remote Sensing (AREA)
- Mechanical Engineering (AREA)
- Support Of Aerials (AREA)
- Variable-Direction Aerials And Aerial Arrays (AREA)
Abstract
The invention provides a shafting processing method of a large-span radar turntable, wherein the turntable can rotate along a vertical axis, two ends of the turntable are respectively provided with a pitching support arm which can be in rotary fit with two ends of an antenna array surface, and the inner hole processing of the pitching support arm comprises the following steps of S1: boring rough machining is respectively carried out on the pitching support arms, and then the pitching support arms are respectively arranged at two ends of the turntable; s2: semi-finishing the pitching support arms at the two ends of the turntable respectively; s3: load plates are applied to the upper ends of the two pitching support arms, and the inner holes of the pitching support arms at one end are subjected to finish machining; s4: rotating the turntable by 180 degrees, and carrying out finish machining on the inner hole of the pitching support arm at the other end. According to the invention, gravity is provided through the load board, the processing of the shaft holes is performed under the simulation using state, the precision in the using state is ensured to meet the requirement, the shaft holes on two sides are respectively processed through the rotation angle, the influence of the rotation shaft angle on the processing precision is avoided, and the pointing precision of the antenna array surface is improved.
Description
Technical Field
The invention relates to the technical field of machining and assembling of radar turntables, in particular to a shafting machining method and an assembling method of a large-span radar turntable.
Background
The measuring radar has the functions of trajectory tracking, weapon measurement and control and the like, and generally requires a two-dimensional turntable to provide azimuth and pitching two-dimensional rotary motion for an antenna array surface, and the perpendicularity error of an azimuth rotating shaft and a pitching rotating shaft is directly related to the angle measurement error of the radar. In order to provide detection power, the existing radar is developed towards a large-size array surface (more than 10 meters), for example, a precise turntable of the large-inertia radar disclosed in the patent application of the application number 2021114414820 is required to be respectively arranged at two ends of the turntable on pitching support arms which are in running fit with the array surface, and because the weight of the array surface is large, the pitching support arms can be inclined towards the inner side of the array surface after being assembled, and rotating shafts at two ends cannot be kept horizontal; and difficulties are brought to the processing and assembly of the azimuth and pitching axes of the radar turntable.
In the prior art, the processing of the azimuth axis and the pitching axis are separated independently, the positioning circle processing technology of the azimuth axis is mature, and the coaxiality of the two pitching support arms is ensured by processing the two pitching support arms with the standard. When the pitching shaft system is assembled, the equal heights of the two pitching support arms are generally ensured through grinding of the transition block, repeated adjustment and installation are needed, and the whole assembly time is long. In addition, the weight of the antenna array surface with a large span reaches more than ten tons, and the antenna array surface is assembled with two pitching support arms to generate gravity deformation on the turntable, so that the included angle between the axis of the pitching support arms and the horizontal plane is influenced, the perpendicularity error between the azimuth rotation axis and the pitching rotation axis is increased, and finally the pointing precision of the antenna array surface is reduced.
Disclosure of Invention
The invention aims to provide a shafting machining method and an assembling method for ensuring absolute coaxiality of pitching support arms at two ends of a large-span radar turntable.
The invention solves the technical problems through the following technical scheme: the shafting processing method of the large-span radar turntable comprises the following steps that the turntable can rotate along a vertical axis, two ends of the turntable are respectively provided with a pitching support arm which can be in rotary fit with two ends of an antenna array surface, the inner hole processing of the pitching support arm comprises the following steps,
s1: boring rough machining is respectively carried out on the pitching support arms, and then the pitching support arms are respectively arranged at two ends of the turntable;
s2: semi-finishing the pitching support arms at the two ends of the turntable respectively;
s3: load plates are applied to the upper ends of the two pitching support arms, and the inner holes of the pitching support arms at one end are subjected to finish machining;
s4: rotating the turntable by 180 degrees, and carrying out finish machining on the inner hole of the pitching support arm at the other end.
According to the invention, the precision is improved for the step-by-step boring of the pitching support arm, the gravity is provided by the load board, the angle change of the pitching support arm under the action of the gravity is simulated, the machining of the shaft holes is performed under the simulation use state, the precision in the use state is ensured to meet the requirement, the shaft holes on two sides are respectively machined through the rotation angle, the influence of the rotation shaft angle on the machining precision is avoided, and the pointing precision of the antenna array surface is improved.
Preferably, the pitch support arm boring rough machining has the machining precision grade of IT9, and the machining size is 0.5mm smaller than the design size.
Preferably, the semi-finished machining dimension is 0.1mm smaller than the design dimension.
Preferably, the weight of the load board is substantially the same as the weight of the antenna array face.
Preferably, the inner hole of the pitching support arm is finished by using a numerical control milling machine.
The invention also provides a shafting assembly method of the large-span radar turntable, which is used for processing the pitching support arm to obtain the pitching support arm, the assembly method comprises the following steps of,
s5: measuring an included angle between the axial direction and the horizontal direction of the pitching support arm after the load plate is removed;
s6: applying single-side loads on two sides of the turntable respectively to enable the axial direction of the pitching support arm to be parallel to the horizontal direction;
s7: removing one of the pitching support arms, and suspending the antenna array surface above the turntable, so that one end of the antenna array surface is fixedly matched with the shaft hole of the fixed pitching support arm;
s8: matching a pitching support arm on the other side with a rotating shaft of the antenna array surface, and then fixing the pitching support arm on a turntable; the single-sided load on both sides is removed.
Preferably, the angle of the pitch arm axis relative to the horizontal is measured by a laser tracker.
Preferably, the antenna array surface is lifted by at least one crane, and the crane is at least matched with two ends of the antenna array surface.
The shafting processing method and the assembly method of the large-span radar turntable provided by the invention have the advantages that: the precision is improved to every single move support arm bore hole step by step, provides gravity through the load board, and the angle change of simulation every single move support arm under the action of gravity carries out the processing in shaft hole under the simulation service condition, ensures that the precision under the service condition satisfies the requirement to through rotation angle processing both sides shaft hole respectively, avoid the influence of pivot angle to machining precision, improve the directional precision of antenna array face. During assembly, the shaft holes of the pitching support arms on two sides are kept horizontal through the single-side counterweight, so that the mismatch of angles of the pitching support arms and the antenna array surface is prevented, and the assembly precision is improved.
Drawings
FIG. 1 is a schematic illustration of a large-span radar turret provided by an embodiment of the present invention;
fig. 2 is a schematic diagram of a processing method of a large-span radar turntable according to an embodiment of the present invention;
fig. 3 is a schematic diagram of a shafting assembly method of a large-span radar turntable according to an embodiment of the present invention;
fig. 4 is a schematic diagram II of a shafting assembly method of a large-span radar turntable according to an embodiment of the present invention;
fig. 5 is a schematic diagram III of a shafting assembly method of a large-span radar turntable according to an embodiment of the present invention.
Detailed Description
For the purposes of making the objects, technical solutions and advantages of the present invention more apparent, the technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings, and it is apparent that the described embodiments are some embodiments of the present invention, not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the invention without making any inventive effort, are intended to be within the scope of the invention.
As shown in fig. 1, the present embodiment provides a shafting processing method of a large-span radar turntable, comprising a turntable 1 capable of rotating around a vertical axis and pitch support arms 2 fixed at both ends of the turntable 1, wherein the inner hole processing step of the pitch support arms 2 comprises,
s1: boring rough machining is respectively carried out on the pitching support arms 2, and then the pitching support arms are respectively arranged at two ends of the turntable 1;
the machining size of the rough machining is 0.5mm smaller than the design size of the inner hole, and the machining precision grade is IT9;
s2: semi-finishing the pitching support arms 2 at the two ends of the turntable 1 respectively; the processing size of the semi-finishing process is 0.1mm smaller than the design size,
s3: referring to fig. 2, a load plate 4 is applied to the upper ends of two pitch arms 2, and the inner holes of the pitch arms at one end are finished;
the load board 4 is designed according to the weight of the antenna array surface 3, the weight of the load board 4 is basically consistent with the weight of the antenna array surface 3, the load board 4 is pressed at the upper ends of the pitching support arms 2 at the two ends, the weight of the antenna array surface 3 is simulated to enable the pitching support arms 2 at the two ends to incline under the action of gravity, and then the inner hole of one pitching support arm 2 is finished by using the numerical control milling machine 5, so that the design size is met.
S4: rotating the turntable by 180 degrees, and carrying out finish machining on the inner hole of the pitching support arm 2 at the other end.
Through processing after rotation angle, can effectually eliminate the angle deviation that vertical axis relative vertical direction's skew leads to, ensure that every single move support arm 2 at both ends is absolute coaxial, improve machining precision.
Furthermore, the embodiment also provides a method for assembling the antenna array surface on the large-span radar turntable, after finishing boring finish of the pitching support arms 2 at the two ends, the load board 4 is removed, at this time, the pitching support arms 2 at the two sides can automatically reset to cause the shaft hole to incline from the horizontal direction, and in the final assembly, the antenna array surface is large in weight, and the inclination adjustment angle of the antenna array surface is inconvenient to control, so that direct assembly can be difficult.
The assembly method provided by the embodiment comprises the following steps:
s5: measuring the included angle between the axial direction and the horizontal direction of the pitching support arm 2 after the load plate 4 is removed;
in the embodiment, the included angle of the axial direction of the pitching support arm 2 relative to the horizontal direction is measured by a laser tracker;
s6: referring to fig. 3, a single-side load 6 is applied to both sides of the turntable 1, respectively, so that the axial direction of the pitch arm 2 is parallel to the horizontal direction;
the single-side load 6 is directly placed on the turntable 1, the angle transformation is detected by a laser tracker, and when the pitching support arm 2 axially returns to the horizontal direction under the action of the single-side load 6, the weight and the position of the single-side load 6 are determined;
s7: referring to fig. 4, one of the elevation arms 2 is removed, and the antenna array surface 3 is suspended above the turntable 1, so that one end of the antenna array surface 3 is fixedly matched with the shaft hole of the fixed elevation arm 2;
the antenna array surface 3 is lifted by the travelling crane 7, and the travelling crane 7 at least needs to be matched with two ends of the antenna array surface 3, and one travelling crane 7 or two travelling cranes 7 can be used separately;
s8: referring to fig. 5, the pitch arm 2 on the other side is fitted with the rotation shaft of the antenna array plane, and then the pitch arm is fixed on the turntable 1; removing the single-side loads on two sides;
the other pitching support arm 2 is suspended and fixed through the other travelling crane 7, is fixed with the rotating shaft of the antenna array surface 3, and then is installed on the turntable 1, the unilateral loads 6 on two sides are removed, and then the antenna array surface 3 and the pitching support arm 2 are respectively disengaged with the travelling crane 7.
According to the embodiment, the pitching support arms 2 on two sides are kept horizontal by respectively applying single-side load, then the antenna array surface 3 is installed, the antenna array surface 3 and the pitching support arms 2 are ensured to be matched in the horizontal direction, structural safety is prevented from being influenced by angle deviation, and the pointing precision of the antenna array surface is improved.
The above embodiments are only for illustrating the technical solution of the present invention, and are not limiting; although the invention has been described in detail with reference to the foregoing embodiments, it will be understood by those of ordinary skill in the art that: the technical scheme described in the foregoing embodiments can be modified or some technical features thereof can be replaced by equivalents; such modifications and substitutions do not depart from the spirit and scope of the technical solutions of the embodiments of the present invention.
Claims (7)
1. A shafting processing method of a large-span radar turntable is characterized by comprising the following steps of: the turntable can rotate along a vertical shaft, two ends of the turntable are respectively provided with a pitching support arm which can be in running fit with two ends of the antenna array surface, the inner hole processing of the pitching support arm comprises the following steps,
s1: boring rough machining is respectively carried out on the pitching support arms, and then the pitching support arms are respectively arranged at two ends of the turntable;
s2: semi-finishing the pitching support arms at the two ends of the turntable respectively;
s3: load plates are applied to the upper ends of the two pitching support arms, and the inner holes of the pitching support arms at one end are subjected to finish machining;
s4: rotating the turntable by 180 degrees, and carrying out finish machining on the inner hole of the pitching support arm at the other end;
the weight of the load board is basically the same as the weight of the antenna array surface.
2. The shafting machining method of the large-span radar turntable, according to claim 1, is characterized by comprising the following steps: the machining precision grade of the pitch support arm boring rough machining is IT9, and the machining size is 0.5mm smaller than the design size.
3. The shafting machining method of the large-span radar turntable, according to claim 1, is characterized by comprising the following steps: the machining size of the semi-finishing is 0.1mm smaller than the design size.
4. The shafting machining method of the large-span radar turntable, according to claim 1, is characterized by comprising the following steps: and (5) carrying out finish machining on the inner hole of the pitching support arm by using a numerical control milling machine.
5. A shafting assembly method of a large-span radar turntable is characterized by comprising the following steps of: a pitch arm manufactured by the method of any one of claims 1-4, the method comprising,
s5: measuring an included angle between the axial direction and the horizontal direction of the pitching support arm after the load plate is removed;
s6: applying single-side loads on two sides of the turntable respectively to enable the axial direction of the pitching support arm to be parallel to the horizontal direction;
s7: removing one of the pitching support arms, and suspending the antenna array surface above the turntable, so that one end of the antenna array surface is fixedly matched with the shaft hole of the fixed pitching support arm;
s8: matching a pitching support arm on the other side with a rotating shaft of the antenna array surface, and then fixing the pitching support arm on a turntable; the single-sided load on both sides is removed.
6. The shafting assembly method of a large-span radar turret according to claim 5, wherein: and measuring the included angle of the axial direction of the pitching support arm relative to the horizontal direction by a laser tracker.
7. The shafting assembly method of a large-span radar turret according to claim 6, wherein: the antenna array surface is lifted and carried by at least one travelling crane, and the travelling crane is at least matched with two ends of the antenna array surface.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
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| CN202210372534.1A CN114799746B (en) | 2022-04-11 | 2022-04-11 | Shafting machining method and assembly method of large-span radar turntable |
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| CN202210372534.1A CN114799746B (en) | 2022-04-11 | 2022-04-11 | Shafting machining method and assembly method of large-span radar turntable |
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| CN114799746B true CN114799746B (en) | 2023-05-02 |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN100509226C (en) * | 2007-04-29 | 2009-07-08 | 北京航天控制仪器研究所 | Finish machining method of the frame of the rotating table |
| CN102079045A (en) * | 2009-12-01 | 2011-06-01 | 贵州航天控制技术有限公司 | Processing method of parts with long shaft and thin wall and processing clamp thereof |
| GB2477573B (en) * | 2010-02-09 | 2012-05-30 | Azure Shine Int Inc | Antenna mount |
| CN102350617B (en) * | 2011-09-08 | 2013-07-10 | 中国航空工业第六一八研究所 | Method for processing high-accuracy easily-deformable U-shaped cantilever structural member |
| CN103769810B (en) * | 2013-12-20 | 2016-03-09 | 河北汉光重工有限责任公司 | U-shaped holder combination coaxial accuracy Controlling Technology |
| CN105752266B (en) * | 2016-02-29 | 2018-02-06 | 上海外高桥造船有限公司 | The process of large ship shafting segmentation bore hole installation |
| CN205950360U (en) * | 2016-07-22 | 2017-02-15 | 常州第四无线电厂有限公司 | Make frock of three -dimensional revolving stage |
| CN106428415B (en) * | 2016-09-20 | 2018-11-09 | 中交一航局第三工程有限公司 | Not bore hole method stern tube mounting process |
| CN111478015B (en) * | 2020-06-08 | 2021-05-04 | 中国电子科技集团公司第十四研究所 | High-precision driving and supporting integrated device for large heavy-load phased array antenna array surface |
| CN111740207A (en) * | 2020-07-03 | 2020-10-02 | 中国电子科技集团公司第十四研究所 | Three-point bearing large-scale heavy-load high-precision two-dimensional phase-scanning radar antenna pedestal |
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