Rapid multi-angle position adjustment tool for radome and method of using the same

Abstract

This application provides a fixture for rapid multi-angle pose adjustment of a radome and its usage method. The rapid adjustment fixture includes a zero-point quick-change component, a yaw angle adjustment component, a pitch angle adjustment component, and a tilt adjustment component. The yaw angle adjustment component and the zero-point quick-change component are rotatably connected via a Z-axis fixing pin. The pitch angle adjustment component and the yaw angle adjustment component are rotatably hinged via a Y-axis support axis. The tilt adjustment component and the pitch angle adjustment component are rotatably connected via an X-axis rotation axis. The multi-axial rotational hinge connection method provided in this application enables rapid adjustment of the radome's multi-angle pose. The usage method provided in this application enables rapid positioning of the radome and high-precision adjustment of multiple angles of the radome, greatly improving the pose adjustment efficiency of the radome.

Description

Technical Field

[0001] This application relates to the field of ceramic material machining technology, specifically to a tooling for rapid adjustment of the multi-angle pose of an antenna radome and its usage method. Background Technology

[0002] The radome is a crucial functional structural component protecting the seeker antenna from harsh environments, playing vital roles in high-temperature wave transmission, heat protection, and thermal insulation. Irregularly shaped, enclosed, deep-cavity radomes typically utilize quartz fiber-reinforced ceramic matrix composites. The high brittleness, hardness, and wear resistance of ceramic materials make them prone to defects such as chipping and cracking during processing. Irregularly shaped radomes are complex curved, thin-walled structures with deep, enclosed, and narrow internal cavities. Their length-to-diameter ratio is generally greater than 2:1, and the lack of accurate positioning reference surfaces and reliable clamping profiles all affect the radome's machining accuracy. The main machining challenges are as follows:

[0003] (1) Traditional two-axis machining equipment for turning and grinding is only suitable for machining rotating radomes and cannot meet the high-precision machining requirements of radomes with irregular and complex structures. In particular, the inner cavity is deep, closed and narrow, and there are thickness variations in both the circumferential and axial directions. Existing equipment needs to be modified according to the structure of the radome.

[0004] (2) Most radomes are made of quartz fiber reinforced ceramic matrix composites. These composite radomes have the characteristics of high brittleness, high hardness and high wear resistance. They require high-precision cutting tools for processing. They also need to have high wear resistance while having high dimensional and shape accuracy, so as to meet the continuous processing requirements of large-size complex surfaces.

[0005] (3) During the processing, the lengthening of the grinding device, tooling clamping, reference surface transfer, cutting tools, and measurement links will all affect the processing progress of the radome. Moreover, each single-factor error source has certain fluctuations depending on the processing conditions. Therefore, it is necessary to optimize and modify the radome tooling to reduce the impact of tooling vibration, deformation, incomplete positioning, and tedious and time-consuming adjustment and alignment on the overall processing cycle and radome quality, thereby improving the radome quality. Summary of the Invention

[0006] To address one of the aforementioned technical deficiencies, this application provides a multi-angle pose rapid adjustment fixture for radomes and its usage method. The improved fixture can effectively solve the problems of large deformation during workpiece processing, difficulty in determining positioning references, long radome alignment time, mutual interference and influence between multiple angles, and difficulty in guaranteeing the accuracy of radome adjustment and alignment. It can achieve precise processing of large enclosed deep cavity radomes, thus providing important support for the development and production of a series of key aircraft models.

[0007] According to an embodiment of this application, a fixture for rapid multi-angle pose adjustment of an radome is provided, including a null-point quick-change component, a yaw angle adjustment component, a pitch angle adjustment component, and a tilt adjustment component. The yaw angle adjustment component is mounted on the null-point quick-change component and is rotatably engaged with the null-point quick-change component via a Z-axis fixing pin. The pitch angle adjustment component is mounted on the yaw angle adjustment component, with one end of the pitch angle adjustment component rotatably hinged to the yaw angle adjustment component via a Y-axis support axis, and a wedge adjustment mechanism is provided between the other end of the pitch angle adjustment component and the yaw angle adjustment component. The tilt adjustment component is mounted on the pitch angle adjustment component and is rotatably engaged with the pitch angle adjustment component via an X-axis rotation axis. The tilt adjustment component is provided with a clamping mechanism adapted to the radome.

[0008] Preferably, the zero-point quick-change assembly includes a lower base plate and an upper base plate. The lower base plate is provided with a fixing block and a quick-change chuck. The fixing block is tightly fitted to the machine tool platform by bolts. A pull stud is installed on the lower surface of the upper base plate. The pull stud corresponds to the position of the quick-change chuck. The pull stud is fixedly connected to the upper base plate by fastening bolts. The Z-axis fixing pin is installed on the upper base plate.

[0009] More preferably, the upper base plate is provided with a lifting ring.

[0010] Preferably, the yaw angle adjustment assembly includes a yaw angle adjustment plate, which is disposed on the zero-point quick-change assembly. The yaw angle adjustment plate is provided with a first pin hole, and the Z-axis fixing pin passes through the first pin hole and is connected to the zero-point quick-change assembly. Two symmetrical bases are provided at one end of the yaw angle adjustment plate, and the bases are rotatably engaged with the pitch angle adjustment assembly through the Y-axis support shaft.

[0011] More preferably, the yaw angle adjustment assembly further includes a first yaw adjustment bolt, a second yaw adjustment bolt, a first irregular nut, and a second irregular nut. Two symmetrical fixing plates are provided on both sides of the other end of the yaw angle adjustment plate. The first irregular nut and the second irregular nut are symmetrically arranged on both sides of the yaw angle adjustment plate and are fixedly connected to the zero-point quick-change assembly. After the first yaw adjustment bolt is threadedly connected to the first irregular nut, it abuts against one side fixing plate of the yaw angle adjustment plate. After the second yaw adjustment bolt is threadedly connected to the second irregular nut, it abuts against the other side fixing plate of the yaw angle adjustment plate.

[0012] Preferably, the yaw angle adjustment assembly includes a slide rail, and the pitch angle adjustment assembly includes a pitch angle adjustment bracket and a wedge adjustment mechanism. The pitch angle adjustment bracket is disposed on the yaw angle adjustment assembly, and the end of the pitch angle adjustment bracket near the Z-axis fixing pin is rotatably hinged to the yaw angle adjustment assembly via a Y-axis support shaft. The wedge adjustment mechanism includes a wedge, a third shaped nut, and a pitch adjustment bolt. The wedge is located between the pitch angle adjustment bracket and the slide rail, and the wedge slides with the slide rail. The third shaped nut is installed on the slide rail at the end away from the Z-axis fixing pin, and the pitch adjustment bolt is threadedly connected to the third shaped nut and then fixedly connected to the wedge.

[0013] More preferably, the bottom of the pitch angle adjustment bracket is provided with a wear-resistant block, which is located between the wedge block and the pitch angle adjustment bracket.

[0014] More preferably, both ends of the pitch angle adjustment bracket have adjustment seats, and the adjustment seats are rotatably connected to the tilt adjustment assembly via the X-axis rotation axis.

[0015] Preferably, the tilt adjustment assembly includes a tilt adjustment bracket and a first screw jack. The tilt adjustment bracket is disposed on the pitch angle adjustment assembly, and the tilt adjustment bracket and the pitch angle adjustment assembly are rotatably connected via the X-axis rotation axis. The tilt adjustment bracket is provided with a clamping mechanism adapted to the radome. The first screw jack is mounted on the zero-point quick-change assembly, and the upper end of the first screw jack is movably abutting against the tilt adjustment bracket.

[0016] More preferably, the number of the first spiral jacks is four, with two first spiral jacks located on both sides of the end of the pitch angle adjustment component away from the Z-axis fixing pin, and the other two first spiral jacks located on both sides of the end of the pitch angle adjustment component closer to the Z-axis fixing pin.

[0017] More preferably, the clamping mechanism includes a base, a lower clamp, and an upper clamp. The lower clamp and the upper clamp are connected by clamping bolts, and a clamping space adapted to the radome is formed between the lower clamp and the upper clamp. The lower clamp is connected to the base by fixing bolts.

[0018] More preferably, the tilt adjustment bracket is further provided with a limiting baffle, which is located at the end of the tilt adjustment bracket away from the wedge adjustment mechanism.

[0019] Preferably, the multi-angle pose quick adjustment fixture for the radome further includes a pressure plate assembly, which includes a pressure plate and a second spiral jack. The second spiral jack is mounted on the zero-point quick-change assembly. One end of the pressure plate is fixedly connected to the upper end of the second spiral jack, and the lower surface of the pressure plate is in movable contact with the tilt adjustment assembly.

[0020] More preferably, the pressure plate assembly further includes a positioning bolt. The pressure plate is provided with a through hole. The positioning bolt passes through the through hole of the pressure plate and is threadedly connected to the zero-point quick-change assembly. The pressure plate and the positioning bolt are in sliding engagement. The positioning bolt is located between the second spiral jack and the tilt adjustment bracket.

[0021] Based on the above-mentioned radome multi-angle pose rapid adjustment fixture, this application embodiment provides a method for using the radome multi-angle pose rapid adjustment fixture, which can realize rapid adjustment of the multi-angle pose of a face-symmetric contour-following radome without reference.

[0022] According to an embodiment of this application, a method for using a fixture for rapid multi-angle pose adjustment of an antenna radome is provided, comprising the following steps:

[0023] (1) After hoisting the multi-angle pose quick adjustment fixture of the radome, place it on the machine tool platform and fix the radome in the clamping mechanism;

[0024] (2) Install the ball head measuring rod, run the internal surface inspection program, measure the blank allowance of the radome on different cross-sectional coordinate axes, calculate the radome's sway angle and the direction to be adjusted based on the difference in allowance, and drive the radome to rotate around the Z-axis through the sway angle adjustment component so that the radome's sway angle meets the processing requirements.

[0025] (3) Run the internal surface inspection program to measure the blank allowance of the radome on different cross-sectional coordinate axes. Based on the difference in allowance, calculate the pitch angle of the radome and the direction to be adjusted. Drive the radome to rotate around the Y-axis through the pitch angle adjustment component so that the pitch angle of the radome meets the processing requirements.

[0026] (4) Run the internal surface inspection program to measure the blank allowance of the radome on different cross-sectional coordinate axes. Based on the difference in allowance, calculate the pitch angle of the radome and the direction to be adjusted. Drive the radome to rotate around the X-axis through the tilt adjustment component so that the tilt angle of the radome meets the processing requirements.

[0027] Step (4) is followed by clamping and fixing the yaw angle adjustment component, pitch angle adjustment component and tilt adjustment component using the pressure plate assembly and the zero point quick-change assembly.

[0028] Steps (2) to (4) further include: after the angle is adjusted, using a dial indicator to detect the angle adjustment result.

[0029] This application embodiment, taking into account the structural characteristics of irregularly shaped enclosed deep cavity radomes, designs a specific quick adjustment fixture. It abandons the multiple fixed support columns in traditional fixtures and adopts a multi-axial rotational hinge connection method, which can realize the rapid adjustment of the radome's multi-angle pose.

[0030] This application embodiment addresses the structural characteristics of irregularly shaped enclosed deep cavity radomes by designing a specific radome pose adjustment method (i.e., the usage method provided in this application embodiment), which enables rapid radome positioning. This method changes the traditional approach, which involves mutual interference and time-consuming adjustments of the radome angle along the X, Y, and Z axes. It significantly improves the radome pose adjustment efficiency and shortens the pose adjustment time by approximately 4 hours.

[0031] Traditional methods of adjusting the radome's position using crowbars, hammers, etc., can easily damage the machine tool or fixture. Compared with traditional methods, the fixture usage method provided in this application embodiment can achieve high-precision adjustment of the radome at multiple angles, avoiding damage to the fixture, radome, and machine tool transmission system caused by using crowbars and hammers. Attached Figure Description

[0032] The accompanying drawings, which are included to provide a further understanding of this application and form part of this application, illustrate exemplary embodiments and are used to explain this application, but do not constitute an undue limitation of this application. In the drawings:

[0033] Figure 1 A perspective view of the multi-angle pose rapid adjustment fixture for the radome provided in the embodiments of this application;

[0034] Figure 2 An exploded view of the zero-point quick-change component provided in the embodiments of this application;

[0035] Figure 3 This is a schematic diagram of the yaw angle adjustment component provided in the embodiments of this application;

[0036] Figure 4 A schematic diagram of the installation of the yaw angle adjustment component provided in the embodiments of this application;

[0037] Figure 5 A schematic diagram of the pitch angle adjustment bracket provided in the embodiments of this application;

[0038] Figure 6 A schematic diagram of the installation of the pitch angle adjustment component provided in the embodiments of this application;

[0039] Figure 7This is a split schematic diagram of the tilt adjustment component provided in an embodiment of this application;

[0040] Figure 8 This is a schematic diagram of the installation of the pressure plate assembly provided in an embodiment of this application.

[0041] In the diagram, 1-Zero point quick-change assembly, 11-Lower base plate, 12-Upper base plate, 13-Fixing pressure block, 14-Quick-change chuck, 15-Pull stud, 16-Fastening bolt, 17-Lifting eye, 18-Z-axis fixing pin, 2-Yaw angle adjustment assembly, 21-Yaw angle adjustment plate, 22-First pin hole, 23-Base, 24-Fixing plate, 25-First yaw adjustment bolt, 26-Second yaw adjustment bolt, 27-First irregular nut, 28-Second irregular nut, 29-Slide rail, 3-Pitch angle adjustment assembly, 3 1-Pitch angle adjustment bracket, 32-Wedge block, 33-Third irregular nut, 34-Pitch adjustment bolt, 35-Wear-resistant block, 36-Y-axis support shaft, 37-Adjustment seat, 38-Second pin hole, 4-Tilting adjustment assembly, 41-Tilting adjustment bracket, 42-X-axis rotation shaft, 43-First spiral jack, 44-Lower clamp, 45-Upper clamp, 46-Clamping bolt, 47-Fixing bolt, 48-Limiting baffle, 5-Pressure plate assembly, 51-Pressure plate, 52-Second spiral jack, 53-Positioning bolt. Detailed Implementation

[0042] To make the technical solutions and advantages of the embodiments of this application clearer, the exemplary embodiments of this application will be described in further detail below with reference to the accompanying drawings. Obviously, the described embodiments are only a part of the embodiments of this application, and not an exhaustive list of all embodiments. It should be noted that, unless otherwise specified, the embodiments and features in the embodiments of this application can be combined with each other.

[0043] It should be noted that the radome described in the embodiments of this application refers to a surface-symmetrical contour-following radome without a reference, characterized by an irregularly shaped closed deep cavity, complex inner and outer surfaces, a large taper, and no reference plane orthogonal to the coordinate system.

[0044] In the process of realizing this application, the inventors discovered that since most existing tooling uses pry bars and copper hammers to adjust the position of the radome, this method is prone to damage to the machine tool or tooling and has the following drawbacks: the position adjustment takes a long time, there is a lot of repetitive work, the angle adjustment detection of the radome is difficult to control, and it is not easy to achieve the ideal position adjustment requirements.

[0045] To address the aforementioned problems, this application proposes a multi-angle pose adjustment fixture for irregularly shaped enclosed deep cavity radomes, which features complex inner and outer surfaces, large taper, and the absence of a plane reference orthogonal to the coordinate system. The fixture's structure is as follows: Figures 1-8 .

[0046] like Figures 1-8 As shown in the embodiment of this application, the radome multi-angle pose quick adjustment fixture includes a zero-point quick-change component 1, a yaw angle adjustment component 2, a pitch angle adjustment component 3, a tilt adjustment component 4, and a pressure plate component 5. Yaw angle adjustment component 2 is mounted on null quick-change component 1 and rotates with null quick-change component 1 via Z-axis fixing pin 18; pitch angle adjustment component 3 is mounted on yaw angle adjustment component 2, one end of pitch angle adjustment component 3 is rotatably hinged to yaw angle adjustment component 2 via Y-axis support shaft 36, and the other end of pitch angle adjustment component 3 is provided with wedge adjustment mechanism between it and yaw angle adjustment component 2; tilt adjustment component 4 is mounted on pitch angle adjustment component 3, and tilt adjustment component 4 rotates with pitch angle adjustment component 3 via X-axis rotation shaft 42; tilt adjustment component 4 is provided with clamping mechanism adapted to radome; one end of pressure plate component 5 is fixedly connected to null quick-change component 1, and pressure plate component 5 cooperates with null quick-change component 1 to fix yaw angle adjustment component 2, pitch angle adjustment component 3 and tilt adjustment component 4.

[0047] In this embodiment of the application, the structure of the zero-point quick-change component 1 is as follows: Figure 2 As shown, the zero-point quick-change assembly 1 includes a lower base plate 11 and an upper base plate 12. The lower base plate 11 is provided with a fixing block 13 and a quick-change chuck 14. The fixing block 13 is fitted to the machine tool platform by bolts. The lower surface of the upper base plate 12 is equipped with a pull stud 15, which corresponds to the position of the quick-change chuck 14. The pull stud 15 is fixedly connected to the upper base plate 12 by fastening bolts 16. The upper base plate 12 is provided with a lifting ring 17 and a Z-axis fixing pin 18. The zero-point quick-change assembly 1 and the yaw angle adjustment assembly 2 are rotatably engaged by the Z-axis fixing pin 18.

[0048] In this embodiment of the application, the structure of the yaw angle adjustment component 2 is shown in Figures 3 and 4. The yaw angle adjustment component 2 includes a yaw angle adjustment plate 21, which is disposed on the zero-point quick-change component 1. The yaw angle adjustment plate 21 is provided with a first pin hole 22, and the Z-axis fixing pin 18 passes through the first pin hole 22 and is connected to the zero-point quick-change component 1. Two symmetrical bases 23 are provided at one end of the yaw angle adjustment plate 21.

[0049] This application embodiment is designed with a specific zero-point quick-change component to address the structural characteristics of irregularly shaped enclosed deep cavity radomes. This component allows for product interchangeability between any two machine tools without changing the special cutting tools.

[0050] The yaw angle adjustment assembly 2 also includes a first yaw adjustment bolt 25, a second yaw adjustment bolt 26, a first irregular nut 27, and a second irregular nut 28. Two symmetrical fixing plates 24 are provided on both sides of the other end of the yaw angle adjustment plate 21. The first irregular nut 27 and the second irregular nut 28 are symmetrically arranged on both sides of the yaw angle adjustment plate 21 and are fixedly connected to the zero point quick-change assembly 1. After the first yaw adjustment bolt 25 is threadedly connected to the first irregular nut 27, it abuts against one side of the fixing plate 24 of the yaw angle adjustment plate 21. After the second yaw adjustment bolt 26 is threadedly connected to the second irregular nut 28, it abuts against the other side of the fixing plate 24 of the yaw angle adjustment plate 21.

[0051] In use, the first adjusting bolt 25 and the first irregular nut 27, and the second yaw adjustment bolt 26 and the second irregular nut 28 are used to push the yaw angle adjustment plate 21 to rotate around the Z-axis fixing pin 18, thereby realizing the yaw angle adjustment assembly 2 to adjust the yaw angle around the Z-axis.

[0052] A slide 29 is provided between the two fixed plates 24. The base 23 and the slide 29 cooperate to install the pitch angle adjustment component 3. The base 23 and the pitch angle adjustment component 3 are rotatably connected through the Y-axis support shaft 36.

[0053] In this embodiment, the structure of the pitch angle adjustment component 3 is as follows: Figures 5-6 As shown, the pitch angle adjustment assembly 3 includes a pitch angle adjustment bracket 31 and a wedge adjustment mechanism. The pitch angle adjustment bracket 31 is placed on the yaw angle adjustment plate 21. A wear-resistant block 35 is provided at the bottom of the pitch angle adjustment bracket 31 at the end away from the Z-axis fixing pin 18. The other end of the pitch angle adjustment bracket 31 is rotatably connected to the base 23 through the Y-axis support shaft 36.

[0054] The wedge adjustment mechanism includes a wedge 32, a third shaped nut 33, and a pitch adjustment bolt 34. The wedge 32 is located below the pitch angle adjustment bracket 31 and is in contact with the wear-resistant block 35. The wedge 32 and the wear-resistant block 35 form a friction pair. The wedge 32 is installed in the slide rail 28 and is slidably adapted to the slide rail 28. The second shaped nut 33 is installed at the end of the slide rail 28 away from the Z-axis fixing pin 18. The pitch adjustment bolt 34 is threadedly connected to the third shaped nut 33 and then fixedly connected to the wedge 32.

[0055] The pitch angle adjustment bracket 31 has adjustment seats 37 at both ends, and each adjustment seat 37 has a second pin hole 38 adapted to the X-axis rotation axis 42. It is understood that those skilled in the art can design the shape and size of the two adjustment seats 37 according to the actual situation. For example, the size of the adjustment block closer to the wear-resistant block 35 is smaller than the size of the other adjustment block.

[0056] The third irregular nut 33 and the pitch adjustment bolt 34 form a mating pair. The pitch adjustment bolt 34 pushes the wedge 32, causing the wedge 32 to slide within the slide rail 29, which in turn causes the pitch angle adjustment bracket 31 to rotate around the Y-axis support shaft 36, thereby realizing the pitch angle adjustment function of the pitch angle adjustment assembly 3. The wedge 32 and the wear-resistant block 35 form a friction pair, which can reduce the movement resistance of the wedge 32.

[0057] In this embodiment of the application, the structure of the tilt adjustment component 4 is as follows: Figure 7 As shown, the tilt adjustment assembly 4 includes a tilt adjustment bracket 41, a rotating shaft 42, and a first screw jack 43. The tilt adjustment bracket 41 is located above the pitch angle adjustment bracket 31. The tilt adjustment bracket 41 has a shaft hole corresponding to the second pin hole 38. One end of the rotating shaft 42 is threadedly connected to the second pin hole 38, and the other end of the rotating shaft 42 is rotatably engaged with the shaft hole of the tilt adjustment bracket 41. The rotating shaft 42 and the shaft hole of the tilt adjustment bracket 41 form a mating pair, and the tilt adjustment bracket 41 can rotate around the rotating shaft 42. The first screw jack 43 is mounted on the upper base plate 12, and the upper end of the first screw jack 43 is movably abutting against the tilt adjustment bracket 41.

[0058] It is understood that those skilled in the art can design the number and distribution of the first spiral jacks 43 according to the actual situation. Preferably, there are four first spiral jacks 43, with two of them located on both sides of the end of the pitch angle adjustment component 3 away from the Z-axis fixing pin, and the other two located on both sides of the end of the pitch angle adjustment component 3 closer to the Z-axis fixing pin.

[0059] The tilt adjustment bracket 41 is equipped with a clamping mechanism, which includes a base, a lower clamp 44 and an upper clamp 45. The lower clamp 44 and the upper clamp 45 are connected by a clamping bolt 46, and a clamping space adapted to the radome is formed between the lower clamp 44 and the upper clamp 45. The lower clamp 44 is connected to the base by a fixing bolt 47. The number of clamping mechanisms is not less than three and they are evenly distributed.

[0060] The tilt adjustment bracket 41 is also provided with a limiting baffle 48. The limiting baffle 48 is located close to the lowest point of the clamping space. The limiting baffle 48 is used to block the radome and prevent the radome from tilting and displacing when the pitch angle adjustment bracket 31 rotates around the Y-axis support axis 36.

[0061] In actual use, the first spiral jack 43 on the same side pushes upward, causing the tilt adjustment bracket 41 to rotate around the rotation axis 42, that is, the tilt adjustment bracket 41 rotates around the X-axis, thereby realizing the tilt adjustment function of the tilt adjustment component 4. The clamping mechanism serves to fix the radome. Tightening the clamping bolt 46 can press the upper clamp 45 into the direction of the lower clamp 44, thereby clamping the radome.

[0062] In this embodiment of the application, the structure of the pressure plate assembly 5 is as follows: Figure 8 As shown, the pressure plate assembly 5 includes a pressure plate 51, a second spiral jack 52, and a positioning bolt 53. The second spiral jack 52 is mounted on the upper base plate 12. The pressure plate 51 has a through hole. The positioning bolt 53 passes through the through hole of the pressure plate 51 and is threadedly connected to the upper base plate 12. The pressure plate 51 and the positioning bolt 53 are in sliding fit. The screw of the second spiral jack 52 is fixedly connected to the pressure plate 51. The lower surface of the pressure plate 51 is in movable contact with the upper surface of the tilt adjustment bracket 41. The positioning bolt 53 is located between the second spiral jack 52 and the tilt adjustment bracket 41.

[0063] It is understood that those skilled in the art can set multiple pressure plate assemblies 5 according to actual conditions and place the pressure plate assemblies 5 in appropriate positions. For example, the number of pressure plate assemblies 5 is four, and the four pressure plates 51 correspond to the four corner positions of the tilt adjustment bracket 41.

[0064] After the radome's position is adjusted, the second spiral jack 52 retracts and resets, causing the pressure plate 51 to move downwards, making the lower surface of the pressure plate 51 in close contact with the tilt adjustment bracket 41, thus making the yaw angle adjustment component 2, the pitch angle adjustment component 3, and the tilt adjustment component 4 more stable and playing the role of positioning the radome.

[0065] The working principle of the radome multi-angle pose rapid adjustment fixture provided in this application embodiment is as follows:

[0066] Place the radome in the clamping space between the lower clamp 44 and the upper clamp 45, and then tighten the clamping bolt 46 to clamp the radome with the clamping assembly.

[0067] When adjusting the radome's tilt angle, the zero-point quick-change assembly 1 is fixed on the machine tool table. By rotating the first adjusting bolt 25 and the second tilt adjusting bolt 26, the tilt angle adjustment assembly 2 is driven to rotate around the Z-axis fixing pin 18, causing the pitch angle adjustment assembly 3, the tilt adjustment assembly 4 and the radome to rotate accordingly, thereby realizing the adjustment of the radome's tilt angle.

[0068] When adjusting the pitch angle of the radome, push the wedge 32 to move it within the slide 28, causing the pitch angle adjustment bracket 31 to rotate around the Y-axis support shaft 36, which in turn drives the tilt adjustment component 4 and the radome to rotate, thereby achieving the adjustment of the radome's pitch angle.

[0069] When adjusting the tilt angle of the radome, the first screw jack 43 drives the tilt adjustment component 4 to rotate around the X-axis rotation axis 42, causing the radome to rotate accordingly, thereby realizing the adjustment of the radome tilt angle.

[0070] After adjustment, the second spiral jack 52 retracts, causing the pressure plate 51 to move downwards, so that the pressure plate 51 presses tightly against the tilt adjustment bracket 41, thereby fixing the yaw angle adjustment component 2, the pitch angle adjustment component 3 and the tilt adjustment component 4 on the zero point quick change component 1, making the entire tooling structure stable.

[0071] This application embodiment, taking into account the structural characteristics of irregularly shaped enclosed deep cavity radomes, designs a specific quick adjustment fixture. It abandons the multiple fixed support columns in traditional fixtures and adopts a multi-axial rotational hinge connection method, which can realize the rapid adjustment of the radome's multi-angle pose.

[0072] In this embodiment, adjustment components are provided in the three dimensions of X-axis, Y-axis and Z-axis. Each dimension has an adjustment axis and a fixed adjustment mechanism for angle adjustment, which also avoids mutual interference between the adjustment processes of each dimension.

[0073] In the process of realizing this application, the inventors found that since most of the existing tooling uses pry bars and copper hammers to adjust the position of the radome, this method is prone to damage to the machine tool or tooling and has the following defects: (1) The position adjustment takes a long time and involves a lot of repetitive work; (2) The angle adjustment detection of the radome is difficult to control and it is not easy to achieve the ideal position adjustment requirements; (3) When using traditional tooling to adjust the position of the radome, it is necessary to repeatedly use copper hammers to strike the traditional tooling and use pry bars to pry up the traditional tooling and pad paper, which is inefficient; (4) When the special tool of the processing machine tool needs to be replaced, the traditional tooling is not easy to disassemble and reassemble, and processing can only be carried out after the tool is replaced.

[0074] To address the aforementioned problems, based on the above-mentioned multi-angle pose adjustment fixture for radomes, this application embodiment also provides a method for using the multi-angle pose adjustment fixture for radomes, specifically including the following steps:

[0075] (1) After hoisting the tooling, place it on the machine tool platform, fix the radome in the clamping mechanism, and the limiting baffle 48 abuts against the large end face of the radome.

[0076] (2) Install the ball head measuring rod, run the internal surface inspection program, measure the blank allowance of the coordinate axis of different sections of the radome, calculate the radome's sway angle and the direction to be adjusted based on the difference in allowance (the qualified allowance deviation is ≤0.10mm), drive the radome to rotate around the Z-axis through the sway angle adjustment component 2, so that the radome's sway angle meets the processing requirements; during the angle adjustment process, use a dial indicator to check the angle adjustment result.

[0077] (3) Run the internal surface inspection program to measure the blank allowance of the coordinate axis of different sections of the radome. Based on the difference of the allowance (the qualified allowance deviation is ≤0.10mm), calculate the pitch angle of the radome and the direction to be adjusted. Drive the radome to rotate around the Y axis through the pitch angle adjustment component 3 so that the pitch angle of the radome meets the processing requirements. During the angle adjustment process, use a dial indicator to check the angle adjustment result.

[0078] (4) Run the inner surface inspection program to measure the blank allowance of the coordinate axis of different sections of the radome. Based on the difference of the allowance (the qualified allowance deviation is ≤0.10mm), calculate the pitch angle of the radome and the direction to be adjusted. Drive the radome to rotate around the X-axis through the tilt adjustment component 4. After the angle is adjusted, use a dial indicator to check the angle adjustment result.

[0079] (5) After the angle adjustment is completed, adjust the height of the second spiral jack 52 and tighten the positioning bolt 53 so that the pressure plate 53 is in close contact with the tilt adjustment bracket 41 to ensure that the tooling is stable and reliable after the angle is adjusted.

[0080] If the radome needs to be adjusted counterclockwise in step (2), rotate the first yaw adjustment bolt 25 in the loosening direction and the second yaw adjustment bolt 26 in the tightening direction, so that the yaw angle adjustment plate 21 rotates counterclockwise around the Z-axis until the yaw angle of the radome meets the requirements. If the radome needs to be adjusted clockwise in step (2), rotate the second yaw adjustment bolt 26 in the loosening direction and the first yaw adjustment bolt 25 in the tightening direction, so that the yaw angle adjustment plate 21 rotates clockwise around the Z-axis until the yaw angle of the radome meets the requirements. During the rotation, the first yaw adjustment bolt 25 and the second yaw adjustment bolt 26 maintain close contact with the corresponding fixing plate 24.

[0081] If the direction the radome needs to be adjusted in step (3) is to decrease the radome's pitch angle, rotate the pitch adjustment bolt 34, causing the wedge block 32 to move away from the support shaft 36. Under its own weight, the pitch angle adjustment bracket 31 rotates downward around the support shaft 36, thereby reducing the radome's pitch angle. If the direction the radome needs to be adjusted in step (3) is to increase the radome's pitch angle, rotate the pitch adjustment bolt 34, causing the wedge block 32 to move closer to the support shaft 36, thereby pushing the pitch angle adjustment bracket 31 to rotate upward around the support shaft 36. When the radome's pitch angle is found to meet the requirements, tighten the pitch adjustment bolt 34.

[0082] If the direction of adjustment required for the radome in step (4) is to adjust the tilt angle of the radome clockwise, first adjust the first spiral jacks 43 located on both sides of the small end of the radome and on the right side of the large end of the radome downwards to leave adjustment space between them and the tilt adjustment bracket 41. Then, according to the loosened angle, adjust the first spiral jack 44 located on the left side of the large end of the radome upwards to make the tilt adjustment bracket 41 rotate clockwise around the rotation axis 42, thereby causing the radome to rotate clockwise. When the tilt angle of the radome meets the requirements, adjust the first spiral jacks 43 located on both sides of the small end of the radome and on the right side of the large end of the radome upwards to make them contact the tilt adjustment bracket 41, but not to lift the tilt adjustment bracket 41. Then, tighten the locking nuts of the four first spiral jacks 43 to prevent loosening. If the direction of adjustment required for the radome in step (4) is to adjust the tilt angle of the radome counterclockwise, first adjust the first spiral jacks 43 located on both sides of the small end of the radome and on the left side of the large end of the radome downwards to leave adjustment space between them and the tilt adjustment bracket 41. Then, according to the loosened angle, adjust the first spiral jack 44 located on the right side of the large end of the radome upwards to make the tilt adjustment bracket 41 rotate clockwise around the rotation axis 42, thereby causing the radome to rotate clockwise. When the tilt angle of the radome meets the requirements, adjust the first spiral jacks 43 located on both sides of the small end of the radome and on the left side of the large end of the radome upwards to make them contact the tilt adjustment bracket 41, but not to lift the tilt adjustment bracket 41. Then, tighten the locking nuts of the four first spiral jacks 43 to prevent loosening.

[0083] This application embodiment addresses the structural characteristics of irregularly shaped enclosed deep cavity radomes by designing a specific radome pose adjustment method (i.e., the tooling usage method of this application embodiment). This method enables rapid radome positioning, changing the traditional method's tendency to cause mutual interference and long time consumption when adjusting the radome angle along the X, Y, and Z axes. This significantly improves the radome pose adjustment efficiency and shortens the pose adjustment time by approximately 4 hours.

[0084] Traditional methods use crowbars, hammers, etc. to adjust the position of the radome, which can easily damage the machine tool or tooling. The adjustment angle is difficult to control and it is not easy to meet the processing requirements. The tooling method provided in this application can achieve high-precision adjustment of the radome at multiple angles, avoiding damage to the tooling, radome and machine tool transmission system caused by using crowbars and hammers. The adjustment results can be detected by dial indicator during and after the adjustment process to ensure that the error of the angle adjustment drop value is controlled within 0.05mm.

[0085] This application embodiment utilizes a zero-point quick-change component with a specific structure, which allows for the replacement of the radome on any two machine tools without changing the special tool, flexibly adjusting the processing steps and saving the time (approximately 1.5 hours) required to change the special tool.

[0086] In the description of this application, it should be understood that the terms "upper", "lower", "inner", "outer", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this application.

[0087] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of this application, "multiple" means at least two, such as two, three, etc., unless otherwise explicitly specified.

[0088] In this application, unless otherwise expressly specified and limited, the terms "installation," "connection," "linking," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection, an electrical connection, or a connection that allows communication between them; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication between two components or the interaction between two components. Those skilled in the art can understand the specific meaning of the above terms in this application according to the specific circumstances.

[0089] Although preferred embodiments of this application have been described, those skilled in the art, upon learning the basic inventive concept, can make other changes and modifications to these embodiments. Therefore, the appended claims are intended to be interpreted as including the preferred embodiments as well as all changes and modifications falling within the scope of this application.

[0090] Obviously, those skilled in the art can make various modifications and variations to this application without departing from the spirit and scope of this application. Therefore, if such modifications and variations fall within the scope of the claims of this application and their equivalents, this application also intends to include such modifications and variations.

Claims

1. A radome multi-angle pose rapid adjustment tool, characterized in that, The antenna cover multi-angle pose rapid adjustment tool includes a zero-point quick change assembly, a yaw angle adjustment assembly, a pitch angle adjustment assembly and a tilt adjustment assembly; the yaw angle adjustment assembly is installed on the zero-point quick change assembly and is rotationally connected with the zero-point quick change assembly through a Z-axis fixing pin; the pitch angle adjustment assembly is installed on the yaw angle adjustment assembly, one end of the pitch angle adjustment assembly is rotationally connected with the yaw angle adjustment assembly through a Y-axis support shaft, and a wedge block adjustment mechanism is arranged between the other end of the pitch angle adjustment assembly and the yaw angle adjustment assembly; the tilt adjustment assembly is installed on the pitch angle adjustment assembly, and the tilt adjustment assembly is rotationally connected with the pitch angle adjustment assembly through an X-axis rotating shaft; a clamping mechanism adapted to the antenna cover is arranged on the tilt adjustment assembly. The zero-point quick change assembly includes a lower bottom plate and an upper bottom plate, a fixed pressing block and a quick change chuck are arranged on the lower bottom plate, the fixed pressing block is tightly pressed and adapted to a machine tool platform through a bolt, a draw bolt is installed on the lower surface of the upper bottom plate, the draw bolt corresponds to the position of the quick change chuck, the draw bolt is fixedly connected with the upper bottom plate through a fastening bolt, and the Z-axis fixing pin is installed on the upper bottom plate. The tilt adjustment assembly includes a tilt adjustment bracket and a first screw jack, the tilt adjustment bracket is arranged on the pitch angle adjustment assembly, the tilt adjustment bracket is rotationally connected with the pitch angle adjustment assembly through the X-axis rotating shaft, a clamping mechanism adapted to the antenna cover is arranged on the tilt adjustment bracket, and the first screw jack is installed on the zero-point quick change assembly and movably abuts against the upper end of the tilt adjustment bracket. The antenna cover multi-angle pose rapid adjustment tool further includes a pressing plate assembly, the pressing plate assembly includes a pressing plate and a second screw jack, the second screw jack is installed on the zero-point quick change assembly, one end of the pressing plate is fixedly connected with the upper end of the second screw jack, and the lower surface of the pressing plate movably abuts against the tilt adjustment assembly.

2. The antenna radome multi-angle pose quick adjustment tooling of claim 1, wherein, The yaw angle adjustment assembly includes a yaw angle adjustment plate, the yaw angle adjustment plate is arranged on the zero-point quick change assembly, a first pin hole is arranged on the yaw angle adjustment plate, and the Z-axis fixing pin is connected with the zero-point quick change assembly after penetrating through the first pin hole; one end of the yaw angle adjustment plate is provided with two symmetrical bases, and the bases are rotationally connected with the pitch angle adjustment assembly through the Y-axis support shaft.

3. The antenna radome multi-angle pose quick adjustment tooling of claim 2, wherein, The yaw angle adjustment assembly further includes a first yaw adjustment bolt, a second yaw adjustment bolt, a first special-shaped nut and a second special-shaped nut, two symmetrical fixed plates are arranged on the other end of the yaw angle adjustment plate; the first special-shaped nut and the second special-shaped nut are symmetrically arranged on the two sides of the yaw angle adjustment plate and are fixedly connected with the zero-point quick change assembly, the first yaw adjustment bolt is threadedly connected with the first special-shaped nut and abuts against one side of the fixed plate of the yaw angle adjustment plate, and the second yaw adjustment bolt is threadedly connected with the second special-shaped nut and abuts against the other side of the fixed plate of the yaw angle adjustment plate.

4. The antenna radome multi-angle pose quick adjustment tooling of claim 1, wherein, The yaw angle adjusting assembly comprises a slide, the pitch angle adjusting assembly comprises a pitch angle adjusting bracket and a wedge adjusting mechanism, the pitch angle adjusting bracket is arranged on the yaw angle adjusting assembly, one end of the pitch angle adjusting bracket close to the Z-axis fixed pin is rotationally connected with the yaw angle adjusting assembly through a Y-axis support shaft, the wedge adjusting mechanism comprises a wedge, a third special-shaped nut and a pitch adjusting bolt, the wedge is located between the pitch angle adjusting bracket and the slide, the wedge is in sliding fit with the slide, the third special-shaped nut is installed on the slide at an end away from the Z-axis fixed pin, and the pitch adjusting bolt is in threaded connection with the third special-shaped nut and is fixedly connected with the wedge.

5. The antenna radome multi-angle pose quick adjustment tooling of claim 4, wherein, The bottom of the pitch angle adjusting bracket is provided with a wear-resistant block, and the wear-resistant block is located between the wedge and the pitch angle adjusting bracket.

6. The antenna radome multi-angle pose quick adjustment tooling of claim 4, wherein, Both ends of the pitch angle adjusting bracket are provided with adjusting seats, and the adjusting seats are in rotationally connected with the tilt adjusting assembly through the X-axis rotating shaft.

7. A method for using an antenna cover multi-angle pose rapid adjustment tool, characterized in that, The method comprises the following steps: (1) hoist the antenna cover multi-angle position quick adjusting tooling according to any one of claims 1-6 and place it on the machine tool platform, fix the antenna cover in the clamping mechanism; (2) install a ball head measuring rod, run the inner surface detection program, measure the blank allowance of the antenna cover on different cross-section coordinate axis, calculate the yaw angle of the antenna cover and the direction to be adjusted according to the difference of the allowance, drive the antenna cover to rotate around the Z-axis through the yaw angle adjusting assembly, so that the yaw angle of the antenna cover meets the processing requirement; (3) run the inner surface detection program, measure the blank allowance of the antenna cover on different cross-section coordinate axis, calculate the pitch angle of the antenna cover and the direction to be adjusted according to the difference of the allowance, drive the antenna cover to rotate around the Y-axis through the pitch angle adjusting assembly, so that the pitch angle of the antenna cover meets the processing requirement; (4) run the inner surface detection program, measure the blank allowance of the antenna cover on different cross-section coordinate axis, calculate the pitch angle of the antenna cover and the direction to be adjusted according to the difference of the allowance, drive the antenna cover to rotate around the X-axis through the tilt adjusting assembly, so that the tilt angle of the antenna cover meets the processing requirement.

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