Processing method and processing tooling for large radar elevation track

Abstract

The application relates to a machining method and machining tool of a large radar elevation orbit, and the method comprises the following steps: rough machining, rough machining of an orbit blank, machining allowance of each inner hole, outer circle and end face, machining allowance of two ends in the length direction of the orbit; quenching, quenching of five orbit faces in the order of orbit face three, orbit face five, orbit face one, orbit face two and orbit face four, tempering treatment after the quenching is completed, and cutting of the machining allowance of the two ends in the length direction of the orbit; non-orbit face machining, centering of the inner hole on the inner side according to the rough machining, and finish machining of the inner hole and the outer circle on the inner side matched with the support beam to the position according to the actually measured outer circle size of the support beam; orbit face machining, semi-finish machining of each orbit face and machining allowance, and finish machining of each orbit face to the position. The machining allowance of the two ends of the orbit guarantees that there is no soft belt in the full length after the quenching, the two symmetrical orbit faces are quenched in turn, the deformation in the quenching process of the orbit is offset, the deformation amount in the quenching process of the orbit is reduced, and the machining precision of the orbit is improved.

Description

Technical Field

[0001] This invention relates to the technical field of track processing, specifically to a processing method and tooling for a large radar elevation track. Background Technology

[0002] The pitch track is one of the main components of the radar antenna mount. It can simulate the pitch axis and enable the radar pitch section to move around the pitch axis, thereby enabling the radar to scan in the pitch angle direction. The cylindricity, roughness, and coaxiality of the various support surfaces of the pitch track need to meet the design requirements.

[0003] like Figure 1-2 The radar antenna elevation track shown is manufactured through rough machining, quenching, and finish machining. After rough machining, it undergoes quenching, during which the radar antenna elevation track is subjected to rough machining. Figure 2 The five track surfaces shown are quenched, and then finished by turning and grinding to obtain the finished product.

[0004] Because the pitch track workpiece is large, the deformation during quenching is significant, making it difficult to guarantee the track machining accuracy and causing the track accuracy to easily exceed tolerances. Summary of the Invention

[0005] Based on the above description, the present invention provides a method for processing large radar pitch tracks to solve the problem that the large size of the pitch track workpiece and the large deformation during quenching make it difficult to guarantee the track processing accuracy and cause the track accuracy to easily exceed the tolerance.

[0006] The technical solution of the present invention to solve the above-mentioned technical problems is as follows:

[0007] Firstly, this application provides a method for fabricating a large radar elevation track, the technical solution of which is as follows:

[0008] A method for fabricating a large radar elevation track, comprising:

[0009] Rough machining: Rough machining of the track blank, leaving machining allowances for each inner hole, outer circle and end face, and leaving machining allowances at both ends in the length direction of the track;

[0010] Quenching is performed on the five track surfaces in the order of track surface three, track surface five, track surface one, track surface two, and track surface four. After quenching, tempering is performed, and the machining allowance at both ends of the track length direction is removed.

[0011] For non-track surface machining, align the center according to the rough-machined inner hole, and precision machine the inner hole and outer circle that mate with the support beam according to the actual measured outer circle dimensions of the support beam.

[0012] The track surfaces are machined, with semi-finished machining of each track surface leaving machining allowance, and then finished machining of each track surface to the required level.

[0013] Based on the above technical solution, the present invention can be further improved as follows.

[0014] Preferably, before quenching, a support fixture is installed on the inner side of the track. The support fixture is used to limit the deformation of the track during quenching. The support fixture includes a crossbeam and multiple longitudinal beams. The crossbeam is used to connect the two ends of the track and is perpendicular to the central axis of the track. The longitudinal beams are perpendicular to the crossbeam and are connected to the crossbeam at one end. The multiple longitudinal beams are spaced apart along the length of the crossbeam. The end of the longitudinal beam away from the crossbeam is used to connect to the track and the longitudinal beam is perpendicular to the central axis of the track.

[0015] Preferably, the semi-finishing of each track surface with machining allowance includes:

[0016] Align the center of the inner hole after precision machining, and semi-finish machine the first, second, and third track surfaces, leaving machining allowances.

[0017] Realign the center using the semi-finished machining guide surface one, and leave machining allowances for semi-finished machining guide surfaces four and five.

[0018] Preferably, the finishing of each track surface includes:

[0019] Finish machining of rail surfaces 1, 4, and 5, leaving grinding allowance;

[0020] The track surfaces 1, 4, and 5 are now fully ground.

[0021] Align the center with the finely ground track surface one, and finish track surface two and track surface three with grinding allowance;

[0022] The second and third track surfaces are now in place.

[0023] Preferably, the precision turning of track surface one, track surface four, and track surface five with grinding allowance includes: precision turning of track surface one, track surface four, and track surface five with turning allowance, releasing machining stress and detecting track deformation, and precision turning of track surface one, track surface four, and track surface five with grinding allowance.

[0024] The aforementioned precision turning of track surface two and track surface three with grinding allowance includes: precision turning of track surface two and track surface three with turning allowance, releasing machining stress and detecting track deformation, and precision turning of track surface two and track surface three with grinding allowance.

[0025] Preferably, before machining the track surface, the support beam is assembled onto the track with the inner hole and outer circle already precision machined.

[0026] Preferably, the fixture has a horizontal support plane;

[0027] A positioning device, which is disposed on the support plane, includes a support frame and a positioning ring. The support frame is fixed on the fixture and is used to connect with the support beam. The positioning ring is fixed on the support frame and its axis is vertical.

[0028] Multiple support devices are connected to the support plane, and the multiple support devices are arranged circumferentially around the positioning ring axis. The support devices are used to support the track at the bottom of the track and restrict the track movement in the radial direction of the track.

[0029] A clamping assembly includes a plurality of clamping devices connected to the support plane, the plurality of clamping devices being arranged circumferentially spaced around the axis of the positioning ring, the clamping devices being used to clamp the track above the track.

[0030] Preferably, the support device includes a support base and a positioning block. The support base is fixed on the fixture, and the positioning block is located on the top of the support base. The top surface of the positioning block is a horizontal plane. The side of the positioning block near the positioning ring is an arc surface adapted to the outer circular surface of the inner side of the track, and the side of the positioning block away from the positioning ring is an arc surface adapted to the inner hole surface of the outer side of the track.

[0031] Preferably, the clamping device includes a pressure plate and a screw. The screw has a vertical axis and is threaded onto the fixture. The pressure plate is horizontally positioned and connected to the top of the screw. The pressure plate is rotatable relative to the screw about its axis.

[0032] Preferably, the clamping assembly is provided in two sets, one set of the clamping assembly is used to clamp the rail inside the rail, and the other set of the clamping assembly is used to clamp the rail outside the rail.

[0033] Compared with the prior art, the technical solution of this application has the following beneficial technical effects:

[0034] 1. The processing method of this application, by leaving machining allowance at both ends of the track length direction for quenching, and removing the machining allowance at both ends after quenching, can ensure that there is no soft strip along the entire length of the track after quenching. During quenching, the five track surfaces are quenched in the order of track surface three, track surface five, track surface one, track surface two, and track surface four. Track surface three and track surface five are symmetrical, and track surface two and track surface four are symmetrical. The two symmetrical track surfaces are quenched in this way, which can effectively offset the deformation during the track quenching process, reduce the amount of deformation during track quenching, and improve the machining accuracy of the track.

[0035] 2. The processing method of this application involves loosening the rail between two finishing turns of the rail surface to release the processing stress of the rail and detecting the deformation of the rail. This can reduce the amount of deformation during rail turning and make timely adjustments as needed when the deformation is too large, thereby ensuring the processing accuracy of the rail.

[0036] 3. This application utilizes a machining fixture mounted on a vertical lathe worktable that can rotate with the worktable. During the finishing and radius machining of the rail, the rail is supported by a support device, and the positioning ring in the positioning device serves as a reference center, facilitating the alignment of the rail and improving its positioning accuracy. After alignment, the rail is connected to the support beam on the rail via a support frame, and multiple clamping devices in the clamping assembly clamp the rail onto the support device, improving the positioning stability of the rail and its stability during the machining process, thereby ensuring the machining accuracy of the rail. Attached Figure Description

[0037] Figure 1 This is a schematic diagram of the track structure in this application;

[0038] Figure 2 This is a schematic diagram of the track surface in this application;

[0039] Figure 3 This is a schematic diagram of the assembly of the track and support beam in this application;

[0040] Figure 4 This is an assembly diagram of the supporting tooling and track in an embodiment of the present invention;

[0041] Figure 5 A schematic diagram of the machining fixture for a large radar elevation track provided in an embodiment of the present invention, with the track assembled.

[0042] Figure 6 A schematic diagram of the fixture used in the machining tooling for a large radar elevation track provided in an embodiment of the present invention;

[0043] Figure 7 A schematic diagram of the positioning device in the machining fixture for a large radar elevation track provided in an embodiment of the present invention;

[0044] Figure 8 This is a schematic diagram of the support device in the machining fixture for a large radar elevation track provided in an embodiment of the present invention.

[0045] The attached diagram lists the components represented by each number as follows:

[0046] 1. Support fixture; 11. Crossbeam; 12. Longitudinal beam; 2. Fixture; 21. Support plane; 3. Positioning device; 31. Support frame; 32. Positioning ring; 33. Positioning support; 4. Support device; 41. Support seat; 42. Positioning block; 5. Clamping device. Detailed Implementation

[0047] To facilitate understanding of this application, a more complete description will be provided below with reference to the accompanying drawings, which illustrate embodiments of the present application. However, the present application can be implemented in many different forms and is not limited to the embodiments described herein. Rather, these embodiments are provided so that the disclosure of this application will be thorough and complete.

[0048] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application belongs. The terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the application.

[0049] It is understood that spatial relation terms such as "below," "under," "below," "below," "above," "above," etc., can be used here to describe the relationship between one element or feature shown in the figure and other elements or features. It should be understood that, in addition to the orientation shown in the figure, spatial relation terms also include different orientations of the device in use and operation. For example, if the device in the figure is flipped, the element or feature described as "below" or "below" of the other element or feature will be oriented "above" the other element or feature. Therefore, the exemplary terms "below" and "below" can include both upper and lower orientations. Furthermore, the device may also include other orientations (e.g., rotated 90 degrees or other orientations), and the spatial descriptive terms used herein will be interpreted accordingly.

[0050] It should be noted that when one element is considered to be "connected" to another element, it can be directly connected to the other element or connected to the other element through an intermediary element. In the following embodiments, "connection" should be understood as "electrical connection," "communication connection," etc., if the connected circuits, modules, units, etc., have the transmission of electrical signals or data between them.

[0051] When used herein, the singular forms of “a,” “an,” and “the” may also include the plural forms unless the context clearly indicates otherwise. It should also be understood that the terms “comprising,” “including,” or “having,” etc., specify the presence of the stated feature, whole, step, operation, component, part, or combination thereof, but do not preclude the possibility of the presence or addition of one or more other features, wholes, steps, operations, components, parts, or combinations thereof.

[0052] Reference Figure 3As shown, the large radar elevation track in this application needs to be used in combination with its supporting beam. The supporting beam and the track are processed separately. The supporting beam can be processed according to the design parameters, while the track needs to be processed and adjusted according to the size of the supporting beam during the processing so that it can be smoothly assembled with the supporting beam.

[0053] This application provides a method for fabricating a large radar elevation track, including:

[0054] Rough machining: Roughly machine the track blank, leaving machining allowances for each inner hole, outer circle and end face, and leaving machining allowances at both ends in the length direction of the track.

[0055] Quenching is performed on the five track surfaces in the order of track surface three, track surface five, track surface one, track surface two, and track surface four. After quenching, tempering is performed, and the machining allowance at both ends of the track length direction is removed.

[0056] For non-track surface machining, align the center according to the rough-machined inner hole, and then precision machine the inner hole and outer circle that mate with the support beam according to the measured outer circle dimensions of the support beam.

[0057] The track surfaces are machined, with semi-finished machining of each track surface leaving machining allowance, and then finished machining of each track surface to the required level.

[0058] Before rough machining, the process includes material preparation and inspection. During material preparation, the raw steel ingot is forged into a single ring according to the design dimensions and shape. After overall heat treatment, it is machined, leaving machining allowances for each inner hole, outer circle, and end face. The single ring is then sawn into two semi-circular rings, leaving machining allowances at both ends of the track. The inspection process involves inspecting the track blank, taking samples for mechanical and chemical property testing, performing flaw detection on the track, and measuring the various dimensions and allowances of the track to ensure sufficiency.

[0059] After the track blank passes inspection, rough machining is performed. During rough machining, the two semi-circular tracks are joined together to form a complete circle for turning. Machining allowances are left for each inner hole, outer circle, and end face. These machining allowances are determined based on the quenching layer depth and the effective quenching layer depth to ensure that the effective quenching layer depth meets the requirements after the machining allowance is removed. Machining allowances are left at both ends of the track to ensure that there are no soft strips along the entire length of the track after subsequent quenching.

[0060] During quenching, the five track surfaces are quenched in the order of track surface three, track surface five, track surface one, track surface two, and track surface four. After quenching, tempering is performed, and the machining allowance at both ends of the track length direction is removed.

[0061] Specifically, before quenching, a support fixture 1 is installed on the inner side of the track. The support fixture 1 is used to limit the deformation of the track during quenching. (Refer to...) Figure 4As shown, the support fixture 1 includes a crossbeam 11 and multiple longitudinal beams 12. The crossbeam 11 connects the two ends of the track and is perpendicular to the central axis of the track. The longitudinal beams 12 are perpendicular to the crossbeam 11 and are connected to the crossbeam 11 at one end. The multiple longitudinal beams 12 are spaced apart along the length of the crossbeam 11. The end of the longitudinal beam 12 away from the crossbeam 11 is used to connect to the track, and the longitudinal beam 12 is perpendicular to the central axis of the track. The support fixture 1 can reduce the deformation of the track during quenching. In this embodiment, the support fixture 1 has one crossbeam 11 and three longitudinal beams 12. Connecting blocks are provided at both ends of the crossbeam 11 and at the connection ends of the longitudinal beams 12 with the track. The connecting blocks are machined into an arc shape that matches the track, and the connecting blocks are fixed to the holes designed on the track by bolts.

[0062] After the support fixture 1 is installed, place the rail flat on the quenching workbench and quench the rail using a surface hardening inductor. Specifically, first, quench rail surface three with rail surface three facing up, then flip the rail so that rail surface five is facing up and quench rail surface five. Next, quench rail surface one and rail surface two, and finally flip the rail again to quench rail surface four. After quenching, temper the rail, remove the machining allowance at both ends of the rail, and remove the support fixture 1.

[0063] After the track is quenched, non-destructive testing is performed on the track using dye penetrant testing to detect cracks on the track surface. Samples are also taken from the quenching head to test the hardness and quenching layer depth.

[0064] During the machining of non-track surfaces, the track is placed on leveling shims on the vertical lathe. The center is aligned according to the rough-machined inner hole, and the machining allowances for each inner hole, outer circle, and end face are checked. Based on the measured outer diameter data of the already machined support beam, the inner hole and outer circle of the track that mate with the support beam are precision machined to their correct positions. All end faces of the non-track surfaces are also precision machined to their correct positions. This ensures a precise fit between the track and the support beam. After this machining process, the track and support beam are assembled together for track surface machining.

[0065] Before machining the rail surface, a machining fixture is installed on the vertical lathe workbench to assist in the machining of the rail surface.

[0066] Specifically, refer to Figure 5-8As shown in the embodiment of this application, a machining fixture for a large radar pitch track is also provided, which includes a jig 2, a positioning device 3, a support device 4, and a clamping assembly. The jig 2 is used to fix itself on a vertical lathe workbench, and a horizontal support plane 21 is provided on the jig, with the support plane 21 located at the top of the jig 2. The positioning device 3 is provided on the support plane 21 and includes a support frame 31 and a positioning ring 32. The support frame 31 is fixed on the jig 2 and is used to connect with a support beam. The positioning ring 32 is fixed on the support frame 31 and its axis is vertical. The support device 4 is connected to the support plane 21 and is provided in multiples. The multiple support devices 4 are arranged circumferentially around the axis of the positioning ring 32. The support devices 4 are used to support the track at the bottom of the track and restrict the movement of the track in the radial direction of the track. The clamping assembly includes multiple clamping devices 5 connected to the support plane 21. The multiple clamping devices 5 are arranged circumferentially around the axis of the positioning ring 32 and are used to clamp the track above the track.

[0067] Reference Figure 5-7 As shown, specifically, the top support plane 21 of the jig 2 is circular, and for ease of assembly, the jig 2 is formed by splicing two symmetrical units. The jig 2 is fixed to the vertical car workbench by bolts. The positioning device 3 includes two support frames 31 and a positioning ring 32. The two support frames 31 are connected by bolts to form a support body. The positioning ring 32 is installed on the two support frames 31 and is coaxial with the circular support plane 21. The support body formed by the two support frames 31 is also provided with four positioning supports 33. The positioning supports 33 and the support frames 31 are connected by bolts for connecting with the support beam. The size of the positioning supports 33 is designed according to the size of the support beam. The function of the positioning supports 33 is to connect with the support beam after the track is aligned and to support the support beam and the track.

[0068] Reference Figure 8 As shown, the support device 4 includes a support base 41 and a positioning block 42. The support base 41 is fixed on the fixture 2, and the positioning block 42 is located on top of the support base 41. The top surface of the positioning block 42 is a horizontal plane. The side of the positioning block 42 near the positioning ring 32 is an arc surface adapted to the outer circular surface of the inner side of the track, and the side of the positioning block 42 away from the positioning ring 32 is an arc surface adapted to the inner hole surface of the outer side of the track. The positioning block 42 is used to be embedded between the inner and outer rings of the track. The top plane of the positioning block 42 serves as the track support surface. After the installation and processing fixture, the top surfaces of multiple positioning blocks 42 are precision machined to make the top surfaces of multiple positioning blocks 42 coplanar, ensuring that the track support surfaces are of equal height and providing stable support for the track. The arc surfaces on both sides of the positioning block 42 are designed to better fit the track, thereby limiting radial movement of the track during processing. Specifically, the positioning block 42 can be configured to move closer to or further away from the central axis of the positioning ring 32 and be locked with bolts. This allows the position of the positioning block 42 to be adjusted as needed to adjust the radial position of the track. After completion, the positioning block 42 is locked.

[0069] Reference Figure 5 As shown, the clamping device 5 includes a pressure plate and a screw. The screw axis is vertical and threaded onto the fixture 2. The pressure plate is horizontally set and connected to the top of the screw. The pressure plate can rotate relative to the screw around the screw axis. After the track is positioned, the pressure plate can be rotated to be above the track. By rotating the screw, the pressure plate is lowered to clamp the track. The track is clamped and fixed by multiple pressure plates so that the track can be turned and ground.

[0070] Furthermore, the clamping assembly is provided in two sets. One set of clamping assemblies is used to clamp the rail on the inside of the rail, and the other set of clamping assemblies is used to clamp the rail on the outside of the rail. Depending on the processing position of the rail, the clamping assembly on the outside of the rail clamps the rail when processing the outer rail surface, and the clamping assembly on the inside of the rail clamps the rail when processing the inner rail surface, so as to ensure the normal processing of the rail.

[0071] Before machining the track surface, the machining fixture for the large radar elevation track is first installed on the vertical lathe workbench. Then, the track and support beam assembly is assembled onto the machining fixture. After aligning the center according to the inner hole of the precision machining and leveling the track, the support beam is connected to the support frame 31.

[0072] Semi-finish machining of each track surface with machining allowance includes: centering the track according to the inner hole after finish machining, semi-finish machining track surface 1, track surface 2, and track surface 3 with machining allowance; re-centering the track according to track surface 1 after finish machining, semi-finish machining track surface 4 and track surface 5 with machining allowance. Specifically, first, assemble the track onto the machining fixture with track surface 3 facing upwards, tighten the track with the pressure plate, semi-finish machining track surface 1, track surface 2, and track surface 3 with machining allowance, then loosen the pressure plate, flip the track so that track surface 5 is facing upwards, center it according to track surface 1 after finish machining, and then semi-finish machining track surface 4 and track surface 5 with machining allowance.

[0073] The finishing process for each rail surface includes: precision turning rail surface 1, rail surface 4, and rail surface 5, leaving grinding allowance; precision grinding rail surface 1, rail surface 4, and rail surface 5; aligning the center based on the precision-ground rail surface 1; precision turning rail surface 2 and rail surface 3, leaving grinding allowance; precision grinding rail surface 2 and rail surface 3. After semi-precision turning rail surface 4 and rail surface 5, loosen the pressure plate, observe the rail deformation, and then re-tighten the rail and precision turn each rail surface.

[0074] Furthermore, the finishing of guide surfaces one, four, and five, with grinding allowances, includes: finishing guide surfaces one, four, and five, with turning allowances, releasing machining stress, and checking for guide deformation; finishing guide surfaces one, four, and five, with grinding allowances. The finishing of guide surfaces two and three, with grinding allowances, includes: finishing guide surfaces two and three, with turning allowances, releasing machining stress, and checking for guide deformation; finishing guide surfaces two and three, with grinding allowances. Specifically, guide surfaces one, four, and five are finished in two stages. Between the two finishing stages, the pressure plate is loosened to release machining stress, and guide deformation is checked. After finishing, the grinding head is changed to ensure proper grinding. After the track surfaces 1, 4, and 5 are finely ground to their final positions, loosen the pressure plate and flip the track over. Align the center of the finely ground track surface 1 and then finely grind track surfaces 2 and 3. Similarly, finely grind track surfaces 2 and 3 twice. Loosen the pressure plate between the two fine grinding processes to release the processing stress. After the fine grinding is completed, change the grinding head and finely grind to the final positions.

[0075] Furthermore, during the semi-finishing and finishing turning of the track surface, after each time the track is tightened, a dial indicator is fixed on the jig 2 to detect the deformation of the track surface to be inspected. After the pressure plate is released, the deformation of each track surface is judged based on the changes in the values ​​of each dial indicator, thereby judging the deformation of the track and achieving accurate detection of the track deformation.

[0076] Because the hardness of the track increases after quenching, a layered feed method is used when grinding the track surface to ensure the surface roughness and geometric tolerances.

[0077] After the track is processed, its dimensions and accuracy are inspected. The track is inspected using an optical instrument, a laser tracker, to measure its diameter. The roundness and dimensions of the circle are also checked using a circumferential distribution cross-hatching method.

[0078] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the protection scope of the present invention.

Claims

1. A method for fabricating a large radar elevation track, characterized in that, include: Rough machining: Rough machining of the track blank, leaving machining allowances for each inner hole, outer circle and end face, and leaving machining allowances at both ends in the length direction of the track; Quenching is performed on the five track surfaces in the order of track surface three, track surface five, track surface one, track surface two, and track surface four. After quenching, tempering is performed, and the machining allowance at both ends of the track length direction is removed. For non-track surface machining, align the center according to the rough-machined inner hole, and precision machine the inner hole and outer circle that mate with the support beam according to the actual measured outer circle dimensions of the support beam. Assemble the support beam onto the rail with the inner hole and outer circle of the precision-machined inner side; Track surface machining: semi-finish machining of each track surface with machining allowance, and finish machining of each track surface to the required position; The machining of the track surface is assisted by a large radar pitch track machining fixture, which includes: The fixture (2) has a horizontal support plane (21); The positioning device (3) is located on the support plane (21) and includes a support frame (31) and a positioning ring (32). The support frame (31) is fixed on the jig (2) and used to connect with the support beam. The positioning ring (32) is fixed on the support frame (31) and its axis is vertical. Multiple support devices (4) are connected to the support plane (21). The multiple support devices (4) are arranged circumferentially around the axis of the positioning ring (32). The support devices (4) are used to support the track at the bottom of the track and restrict the track movement in the radial direction of the track. The clamping assembly includes a plurality of clamping devices (5) connected to the support plane (21), the plurality of clamping devices (5) being arranged circumferentially spaced around the axis of the positioning ring (32), the clamping devices (5) being used to clamp the track above the track.

2. The method for processing a large radar elevation track according to claim 1, characterized in that: Before quenching, a support fixture (1) is installed on the inner side of the track. The support fixture (1) is used to limit the deformation of the track during quenching. The support fixture (1) includes a crossbeam (11) and multiple longitudinal beams (12). The crossbeam (11) is used to connect the two ends of the track and is perpendicular to the central axis of the track. The longitudinal beams (12) are perpendicular to the crossbeam (11) and one end is connected to the crossbeam (11). Multiple longitudinal beams (12) are spaced apart along the length of the crossbeam (11). The end of the longitudinal beam (12) away from the crossbeam (11) is used to connect the track and the longitudinal beam (12) is perpendicular to the central axis of the track.

3. The method for processing a large radar elevation track according to claim 1, characterized in that, The semi-finished machining of each track surface with machining allowance includes: Align the center of the inner hole after precision machining, and semi-finish machine the first, second, and third track surfaces, leaving machining allowances. Realign the center using the semi-finished machining guide surface one, and leave machining allowances for semi-finished machining guide surfaces four and five.

4. The method for processing a large radar elevation track according to claim 3, characterized in that, The aforementioned precision machining of each track surface includes: Finish machining of rail surfaces 1, 4, and 5, leaving grinding allowance; The track surfaces 1, 4, and 5 are now fully ground. Align the center with the finely ground track surface one, and finish track surface two and track surface three with grinding allowance; The second and third track surfaces are now in place.

5. The method for processing a large radar elevation track according to claim 4, characterized in that, The aforementioned precision turning of track surface one, track surface four, and track surface five with grinding allowance includes: precision turning of track surface one, track surface four, and track surface five with turning allowance, releasing machining stress and detecting track deformation, and precision turning of track surface one, track surface four, and track surface five with grinding allowance. The aforementioned precision turning of track surface two and track surface three with grinding allowance includes: precision turning of track surface two and track surface three with turning allowance, releasing machining stress and detecting track deformation, and precision turning of track surface two and track surface three with grinding allowance.

6. The method for processing a large radar elevation track according to claim 1, characterized in that: The support device (4) includes a support base (41) and a positioning block (42). The support base (41) is fixed on the fixture (2). The positioning block (42) is located on the top of the support base (41). The top surface of the positioning block (42) is a horizontal plane. The side of the positioning block (42) near the positioning ring (32) is an arc surface that matches the outer circular surface of the inner side of the track. The side of the positioning block (42) away from the positioning ring (32) is an arc surface that matches the inner hole surface of the outer side of the track.

7. The method for processing a large radar elevation track according to claim 1, characterized in that: The clamping device (5) includes a pressure plate and a screw. The screw axis is vertical and threaded onto the fixture (2). The pressure plate is horizontally arranged and connected to the top of the screw. The pressure plate can rotate relative to the screw around the screw axis.

8. The method for processing a large radar elevation track according to claim 1, characterized in that: The clamping assembly is provided in two sets: one set of the clamping assembly is used to clamp the rail inside the rail, and the other set of the clamping assembly is used to clamp the rail outside the rail.

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