A preparation device and method of a split bar chamfer for a radar radome

Abstract

The application belongs to the technical field of aviation composite materials, and provides a preparation device and method for chamfering of a radar antenna cover. The device comprises a right pressing block, a left pressing block, a main pressing block, a left auxiliary pressing block, a right auxiliary pressing block, a lower pressing block, a grinding wheel, a right error-proof block, a lower error-proof block, a main body table, a horizontal guide groove and a vertical guide groove. The shunt strip enters from the right side of the horizontal guide groove, and the groove of the shunt strip to be processed is clamped on the right error-proof block; the shunt strip to be processed moves to the P point along the horizontal guide groove, and the right edge is ground off by the grinding wheel to form a right chamfer, and the whole right side is continuously processed; the horizontal guide groove is rotated by 180 degrees, and the left edge is ground off by the grinding wheel in the same way to form a left chamfer; the shunt strip moves to the P point along the vertical guide groove, and the edge of the end face is ground off by the grinding wheel to form an end face chamfer. The application not only improves the chamfering preparation efficiency, but also improves the quality stability.

Description

Technical Field

[0001] This invention belongs to the field of aerospace composite materials technology, and relates to a preparation device and method for chamfering shunting strips for radar radomes. Background Technology

[0002] The applicant discovered through research that the splitter bar is a conductive component on the outer surface of the aircraft's radar dome. Under normal circumstances, it does not have chamfers, but in certain situations (for example, to enhance the stealth effect of the fuselage and the aerodynamic drag of the streamlined surface), the splitter bar needs to be prepared with some chamfers.

[0003] Because the manifold strips are long and thin, the consistency of the hand-beveling surface can vary, resulting in inconsistent quality. Currently, manifold strip beveling is typically done by hand with a file. The manifold strips are composite materials, approximately 1200mm long and 0.8mm thick. While the manifold strips are highly flexible, the material itself is not very strong, especially after a series of processes such as thickening, grooving, and drilling, making them prone to breakage due to poor flexural strength. Hand-beveling with a file is done section by section, resulting in discontinuous work and an inability to achieve uniform beveling. Inconsistent hand pressure due to labor intensity contributes to breakage, inconsistent quality, low efficiency, and long processing times. Furthermore, securing the manifold strips during processing is also a challenge, further contributing to inefficiency. Therefore, improving the current processing methods is imperative. Summary of the Invention

[0004] The technical problem of this invention is:

[0005] During the chamfering process, diverter strips are prone to a series of problems such as breakage and scrapping, inconsistent chamfer sizes, and low efficiency.

[0006] The purpose of this invention is:

[0007] This invention provides a device and method for preparing chamfered flow dividers. By effectively coordinating tooling and machine tools and changing the clamping state, the flow dividers can achieve the required angle as specified in the drawing. This ensures stable and reliable processing quality of the flow dividers, improves efficiency, and also has an error-proof function to prevent incorrect chamfering and simplifies the process.

[0008] The technical solution of this invention is:

[0009] On one hand, the present invention provides a device for preparing a chamfered shunt strip for a radar radome. The device includes: a right pressure block 1, a left pressure block 2, a main pressure block 3, a left auxiliary pressure block 4, a right auxiliary pressure block 5, a lower pressure block 6, a grinding wheel 7, a right anti-misalignment block 8, a lower anti-misalignment block 9, a main platform 10, a transverse guide groove 14, and a longitudinal guide groove 15.

[0010] The main table 10, tilted at a preset angle, is provided with a transverse guide groove 14 and a longitudinal guide groove 15, arranged in a "T" shape. The main pressure block 3 is located at the intersection P of the transverse guide groove 14 and the longitudinal guide groove 15. The lowest point of the chamfering grinding wheel 7 is located at the intersection P. The left pressure block 2 is located on the left side of the transverse guide groove 14. The left auxiliary pressure block 4 is located between the left pressure block 2 and the intersection P. The right auxiliary pressure block 5 is located between the right pressure block 1 and the intersection P. The lower pressure block 6 is located at the lower end of the longitudinal guide groove 15. The lower anti-misalignment block 9 is located in the middle of the bottom of the longitudinal guide groove 15. The right anti-misalignment block 8 is located in the transverse guide groove. The middle of the bottom of the groove 14; the diverter bar 100 enters from the right side of the transverse guide groove 14, and the groove of the diverter bar 100 to be processed is just stuck on the right anti-misalignment block 8; the diverter bar 100 to be processed moves along the transverse guide groove 14 to point P, and the right edge is ground off by the grinding wheel 7 to form a right chamfer 11, and continues to the left until the entire right side is processed; then rotate 180 degrees along the direction of the transverse guide groove 14, and the grinding wheel 7 grinds off the left edge in the same way to form a left chamfer 12; the diverter bar 100 moves along the longitudinal guide groove 15 to point P, and the transversely moving grinding wheel 7 grinds off the edge of the end face to form an end face chamfer 13.

[0011] On the other hand, the present invention provides a method for preparing a chamfered shunt strip for a radar radome, the method comprising the following steps:

[0012] S1, the diversion strip 100 enters from the right side of the transverse guide groove 14, and the groove of the diversion strip 100 to be processed is just stuck on the right anti-misalignment block 8;

[0013] S2, the flow divider 100 to be processed moves along the transverse guide groove 14 to point P, where the right edge is ground off by the grinding wheel 7 to form a right chamfer 11, and continues to the left until the entire right side is processed; then rotates 180 degrees along the transverse guide groove 14, and the left edge is ground off by the grinding wheel 7 in the same way to form a left chamfer 12.

[0014] S3, the diverter bar 100 moves along the longitudinal guide groove 15 to point P, and the transverse grinding wheel 7 grinds off the edge of the end face to form an end face chamfer 13.

[0015] The beneficial effects of this invention are:

[0016] This invention utilizes the effective coordination of tooling and machine tools to change the clamping state, enabling the flow divider to reach the angle required by the drawing, ensuring stable and reliable processing quality of the flow divider, improving efficiency, and also has an error-proof function to prevent incorrect chamfering, greatly simplifying the processing steps. Attached Figure Description

[0017] Figure 1 This is a schematic diagram of the structure of a fabrication apparatus for a radar radome with a chamfered 100mm shunting strip, according to an embodiment of the present invention.

[0018] Figure 2(a) is a side view of the main pressure block 3 according to an embodiment of the present invention;

[0019] Figure 2(b) is a front view of the main pressure block 3 according to an embodiment of the present invention;

[0020] Figure 2(c) is a three-dimensional schematic diagram of the main pressing block 3 according to an embodiment of the present invention;

[0021] Figure 3 This is a side view of the transverse guide groove 14, the right anti-misalignment block 8, and the right pressure block 1 according to an embodiment of the present invention;

[0022] Figure 4(a) is a side view of the radar radome shunt strip 100 after beveling according to an embodiment of the present invention;

[0023] Figure 4(b) is a three-dimensional schematic diagram of the radar radome shunt strip 100 after beveling according to an embodiment of the present invention.

[0024] Among them: flow divider 100, right pressure block 1, left pressure block 2, main pressure block 3, left auxiliary pressure block 4, right auxiliary pressure block 5, lower pressure block 6, grinding wheel 7, right anti-misalignment block 8, lower anti-misalignment block 9, main body 10, right chamfer 11, left chamfer 12, end face chamfer 13, transverse guide groove 14, longitudinal guide groove 15. Detailed Implementation

[0025] refer to Figure 1 Figures 4 and 5 illustrate a preparation apparatus for chamfering a shunt strip for a radar radome according to the present invention, used to process a shunt strip 100. The shunt strip 100 is a thin-walled, inverted, concave elongated structure. The apparatus includes: a right pressure block 1, a left pressure block 2, a main pressure block 3, a left auxiliary pressure block 4, a right auxiliary pressure block 5, a lower pressure block 6, a grinding wheel 7, a right anti-misalignment block 8, a lower anti-misalignment block 9, a main platform 10, a transverse guide groove 14, and a longitudinal guide groove 15.

[0026] In some embodiments, the assembly relationship of the various components is as follows: a transverse guide groove 14 and a longitudinal guide groove 15 are provided on the main body table 10, which is inclined at a preset angle and are distributed in a "T" shape; the main pressure block 3 is located at the intersection point P of the transverse guide groove 14 and the longitudinal guide groove 15; the lowest point of the grinding wheel 7 used for cutting and chamfering is located at the intersection point P; the left pressure block 2 is located on the left side of the transverse guide groove 14; the left auxiliary pressure block 4 is located between the left pressure block 2 and the intersection point P; the right auxiliary pressure block 5 is located between the right pressure block 1 and the intersection point P; the lower pressure block 6 is located at the lower end of the longitudinal guide groove 15; the lower anti-misalignment block 9 is located in the middle of the bottom of the longitudinal guide groove 15; the right anti-misalignment block 8 is located in the middle of the bottom of the transverse guide groove 14; the diverter strip 100 enters from the right side of the transverse guide groove 14, and the groove of the diverter strip 100 to be processed is precisely locked on the right anti-misalignment block 8.

[0027] In some embodiments, the diverter strip 100 to be processed moves along the transverse guide groove 14 to point P, where the right edge is ground off by the grinding wheel 7 to form a right chamfer 11, and continues to the left until the entire right side is processed; then it rotates 180 degrees along the transverse guide groove 14, and the grinding wheel 7 grinds off the left edge in the same way to form a left chamfer 12; the diverter strip 100 moves along the longitudinal guide groove 15 to point P, and the transversely moving grinding wheel 7 grinds off the edge of the end face to form an end face chamfer 13.

[0028] In some embodiments, the right anti-misalignment block 8 and the lower anti-misalignment block 9 are used to prevent the flow divider from being placed on the wrong side during the processing.

[0029] In some embodiments, the main pressure block 3 has an elastic "T" shaped structure with a protrusion near the diverter bar 100. The protrusion has two arcs, which serve to prevent excessive pressure from causing excessive clamping force and insufficient clamping force from causing insufficient clamping force.

[0030] In some embodiments, the radius of the arc is 50mm, and the boss protrudes 0.3mm above the main pressure block 3.

[0031] In some embodiments, the preset angle is 70-78 degrees; or, the preset angle is 74.4 degrees.

[0032] In some embodiments, the right pressure block 1 and the left pressure block 2 are both cuboid structures and are bonded to the main table surface 10; the left auxiliary pressure block 4, the right auxiliary pressure block 5, and the lower pressure block 6 are cuboid structures and are bonded to the main table surface 10.

[0033] In some embodiments, the grinding wheel 7 is mounted on an external machine tool; the lowest part of the grinding wheel 7 is at point P.

[0034] In some embodiments, the right anti-misalignment block 8 is a 0.2×3×10 thick cuboid bonded to the bottom of the transverse guide groove 14.

[0035] This invention proposes a method for preparing a chamfered shunt strip for a radar radome, which utilizes the aforementioned apparatus. The method comprises the following steps:

[0036] S1, the flow divider 100 enters from the right side of the transverse guide groove 14, and the groove of the flow divider 100 to be processed is just stuck on the right anti-misalignment block 8;

[0037] S2, the flow divider 100 to be processed moves along the transverse guide groove 14 to point P, where the right edge is ground off by the grinding wheel 7 to form a right chamfer 11, and continues to the left until the entire right side is processed; then rotates 180 degrees along the transverse guide groove 14, and the left edge is ground off by the grinding wheel 7 in the same way to form a left chamfer 12.

[0038] S3, the diverter bar 100 moves along the longitudinal guide groove 15 to point P, and the transverse grinding wheel 7 grinds off the edge of the end face to form an end face chamfer 13.

[0039] In some embodiments, the method further includes: adjusting the processing angle of the flow divider 100 and adjusting the position of the grinding wheel 7; the flow divider 100 to be processed moves along the transverse guide groove 14 to point P, where the right side edge is ground off by the grinding wheel 7 to form a right chamfer 11, and reaches the left end of the transverse guide groove 14, where a light pulling force is applied, and the right chamfer 11 can be formed with very little force; then it rotates 180 degrees along the transverse guide groove 14, and the left side edge is ground off in the same way to form a left chamfer 12.

[0040] In some embodiments, the chamfering process on both sides of the diverter bar enters from the right end of the transverse guide groove 14 and exits from the left end of the transverse guide groove 14. The clamping block 4 and clamping block 5 play an auxiliary clamping role. The clamping block 3 is a spring block that plays a clamping role during the chamfering process. The lower part of the clamping block 3 has a boss and rounded corners, so there will be no jamming when the diverter bar enters. The entire processing process can be completed by gently pulling the diverter bar by hand.

[0041] In some embodiments, the thickness of the diverter strip 100 is 0.75-0.8 mm and the width is 9.85-10 mm. Considering the smoothness of passage, we make the groove width 10.03 mm and the depth 0.82 mm. The boss on the clamping block 3 is to prevent gaps and to clamp the processed diverter strip.

[0042] In some embodiments, the angle between the slot for clamping the flow divider and the worktable is 74.4 degrees (preferred), calculated based on the chamfering dimensions of the flow divider.

[0043] In some embodiments, in order to prevent incorrect insertion of the diverter strip, the tooling is designed with error prevention devices at both stations. Based on the shape characteristics of the diverter strip, a 0.2×3.5 error prevention block 8 and error prevention block 9 are embedded at the bottom of the groove, so that clamping errors will not occur and waste products will not be generated.

[0044] In some embodiments, the chamfers on both sides of the diverter strip can be adjusted by pulling the diverter strip by hand, while the chamfers on the end face should be made from the direction of the arrow in the longitudinal guide groove, and the end face should be positioned on the upper side of the transverse guide groove 14, which is achieved by the longitudinal movement of the machine tool.

[0045] In some embodiments, the design of the clamping block 3 is different from that of other clamping blocks. It needs to perform the clamping function without causing jamming due to excessive clamping force. If the clamping block is too thin, the clamping force will be insufficient and it will not perform the clamping function, resulting in inconsistent chamfer sizes or even exceeding tolerances. If it is too thick, it will lack elasticity and cause the diverter strip to be jammed due to excessive pressure. After many experiments, a 1.3 mm thick composite material plate was selected as the one that best meets the requirements.

[0046] In some embodiments, the device has adjusted the processing angle of the flow divider and the position of the grinding wheel. The flow divider 100 to be processed moves along the transverse guide groove 14 to point P, where the right side edge is ground off by the grinding wheel 7 to form a right chamfer 11. When it reaches the left end of the guide groove, it can be chamfered by gently pulling it with a small amount of force. Then, it rotates 180 degrees along the transverse guide groove 14 and the left side edge is ground off in the same way to form a left chamfer 12.

[0047] In some embodiments, the two right anti-misalignment blocks 8 and the lower anti-misalignment block 9 are added to prevent the diverter strip from being placed on the wrong side during the processing. This anti-misalignment device will not be added even if there is negligence, because it cannot be placed in the wrong place.

[0048] In some embodiments, the clamping block 3 of the clamping device is a T-shaped design that can clamp in two directions. To prevent jamming during processing, an arc design is made when the diverter enters the clamping device, so that it can easily enter the processing area.

[0049] In some embodiments, the end face is machined. The diverter strip is first inserted from the longitudinal groove 15, and the end face will be stuck on the side wall of the transverse guide groove 14. The side wall of the transverse guide groove 14 also plays a positioning role. During machining, the machine tool is started by transverse movement to complete the machining. Since the end face has less allowance, the machining time is less compared to the two sides.

[0050] In some embodiments, adjusting the clamping method and improving the processing method enhances the machinability of such thin and easily broken materials, making what was originally difficult tasks simple and easy, and also improves processing efficiency and reduces processing time.

[0051] In some embodiments, the structural form and design concept are as follows: The T-shaped clamping block 3 can simultaneously solve the clamping in two directions, and both directions have rounded transitions, making the diverting strip very smooth when entering the processing area; the stop block at the bottom of the groove plays the role of preventing errors, and can 100% prevent the scrap caused by placing it on the wrong side.

[0052] This invention employs a machining method that combines tooling positioning with machine tool coordination, significantly improving the chamfering efficiency of the flow divider strip, ensuring consistent quality, and substantially reducing labor intensity, thereby increasing productivity. This saves considerable man-hours even with increasing production demands. Similar tooling can be applied to other flow divider strip models as needed to further improve productivity.

Claims

1. An apparatus for preparing a chamfered shunt strip for a radar radome, wherein the shunt strip (100) to be processed is a thin-walled, inverted, concave elongated structure, characterized in that, The device includes: a right pressure block (1), a left pressure block (2), a main pressure block (3), a left auxiliary pressure block (4), a right auxiliary pressure block (5), a lower pressure block (6), a grinding wheel (7), a right anti-misalignment block (8), a lower anti-misalignment block (9), a main table surface (10), a transverse guide groove (14), and a longitudinal guide groove (15), wherein: The main platform (10) is inclined at a preset angle and is provided with a horizontal guide groove (14) and a vertical guide groove (15), which are distributed in a "T" shape. The main pressure block (3) is located at the intersection P of the transverse guide groove (14) and the longitudinal guide groove (15); the lowest point of the grinding wheel (7) used for chamfering is located at the intersection P. The left pressure block (2) is located on the left side of the transverse guide groove (14); the left auxiliary pressure block (4) is located between the left pressure block (2) and the intersection point P; the right auxiliary pressure block (5) is located between the right pressure block (1) and the intersection point P; the lower pressure block (6) is located at the lower end of the longitudinal guide groove (15); The lower anti-misalignment block (9) is located in the middle of the bottom of the longitudinal guide groove (15); the right anti-misalignment block (8) is located in the middle of the bottom of the transverse guide groove (14); The flow divider (100) enters from the right side of the transverse guide groove (14), and the groove of the flow divider (100) to be processed is just stuck on the right anti-misalignment block (8); The feeder strip (100) to be processed moves along the transverse guide groove (14) to point P, where the right edge is ground off by the grinding wheel (7) to form a right chamfer (11). It continues to move to the left until the entire right side is processed. Then it rotates 180 degrees along the transverse guide groove (14) and the grinding wheel (7) grinds off the left edge in the same way to form a left chamfer (12). The diverter bar (100) moves along the longitudinal guide groove (15) to point P, and the grinding wheel (7) moves laterally to grind off the edge of the end face to form an end face chamfer (13). The right anti-misalignment block (8) and the lower anti-misalignment block (9) are used to prevent the flow divider from being placed on the wrong side during the processing. The main pressure block (3) is a flexible "T" shaped structure with a boss near the diverter strip (100). There are two arcs on the boss, which can be used to tighten the pressure too much or not tighten it at all.

2. The apparatus according to claim 1, characterized in that, in: The radius of the arc is 50mm, and the boss is 0.3mm higher than the main pressure block (3).

3. The apparatus according to claim 1, characterized in that, in: The preset angle is 70-78 degrees; Alternatively, the preset angle is 74.4 degrees.

4. The apparatus according to claim 1, characterized in that, in: Both the right pressure block (1) and the left pressure block (2) are cuboid structures and are bonded to the main table surface (10); The left auxiliary pressure block (4), right auxiliary pressure block (5), and lower pressure block (6) are cuboid structures and are bonded to the main table surface (10).

5. The apparatus according to claim 1, characterized in that, in: The grinding wheel (7) is mounted on an external machine tool; The bottom part of the grinding wheel (7) is at point (P).

6. The apparatus according to any one of claims 1-5, characterized in that, in: The right anti-misalignment block (8) is a 0.2×3×10 thick cuboid bonded to the bottom of the transverse guide groove (14).

7. A method for preparing a chamfered shunt strip for a radar radome, utilizing the apparatus as described in any one of claims 1-6, characterized in that, The method steps are as follows: S1, the flow divider (100) enters from the right side of the transverse guide groove (14), and the groove of the flow divider (100) to be processed is just stuck on the right anti-misalignment block (8); S2, the flow divider (100) to be processed moves to point P along the transverse guide groove (14), and the right edge is ground off by the grinding wheel (7) to form a right chamfer (11). Continue to the left until the entire right side is processed; then rotate 180 degrees along the transverse guide groove (14), and the left edge is ground off by the grinding wheel (7) in the same way to form a left chamfer (12). S3, the flow divider (100) moves along the longitudinal guide groove (15) to point P, and the horizontally moving grinding wheel (7) grinds off the edge of the end face to form an end face chamfer (13).

8. The method according to claim 7, characterized in that, Also includes: Adjust the machining angle of the flow divider (100) and adjust the position of the grinding wheel (7); The processing strip (100) moves along the transverse guide groove (14) to point P, where the right side edge is ground off by the grinding wheel (7) to form a right chamfer (11). When it reaches the left end of the transverse guide groove (14), a light pulling force is applied, and the right chamfer (11) can be formed with very little force. Then, it rotates 180 degrees along the transverse guide groove (14) and the left side edge is ground off in the same way to form a left chamfer (12).

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