A molding die and method for a hat-shaped reinforced all-carbon fiber radar servo base

Abstract

This invention relates to a molding die and method for a cap-shaped reinforced all-carbon fiber radar servo base. It consists of four parts: a base plate mold, a lower shell mold, an upper shell mold, and an upper shell mold. These four mold parts are positioned together by locating pins. The lower and upper shell molds are combined molds, each composed of six separate molds and their connecting rings. The molding process includes the following steps: mold cleaning; screwing together the separate molds; laying the cap reinforcement skin and foam; laying the base skin; positioning and assembling the molding die; laying the outer ring reinforcement foam and the base outer skin; sealing and curing; demolding; and post-processing such as hole making and polishing. This invention utilizes the modular design and combined use of the molding die, through a layering design method of partitioned layering followed by overall layering, effectively solving the technical difficulties of difficult overall layering, demolding, and co-curing of internally reinforced carbon fiber components.

Description

Technical Field

[0001] This invention belongs to the field of radar servo mechanism processing and manufacturing, and relates to a molding die and molding method for a radar all-carbon fiber servo base with a hat-shaped and T-shaped longitudinal and transverse stiffening structure. It is mainly used in servo transmission structural components such as radar and seeker heads that require lightweight and high strength. Background Technology

[0002] The servo mechanism is an important component of radar, an electronic device that controls the radar's position, azimuth, and pitch motion parameters. The servo base is the main structural component of the servo mechanism, providing support and mounting interfaces for various electrical and mechanical transmission components within the mechanism, and ensuring that it has reliable structural rigidity, excellent impact resistance, weather resistance, and other functional requirements. It is an integrated structural and functional component.

[0003] The servo base contains numerous interface surfaces and mounting surfaces for electrical and structural components, all requiring machining precision of IT6 or higher. To balance weight and rigidity, the servo base incorporates numerous longitudinal and transverse stiffening structures, resulting in a complex structure and significant manufacturing challenges. Currently, servo bases are mostly manufactured using metal cutting methods. The machining process typically includes turning, rough milling, heat treatment, finish milling, and electrical discharge machining (EDM), which is cumbersome and time-consuming. Furthermore, because the servo base is made of metals such as aluminum alloys, it results in a heavy structure, poor corrosion resistance, and poor impact resistance, making it unsuitable for use in airborne radar servo bases requiring significant weight reduction and operating in harsh environments.

[0004] The radar servo base of a certain product is a conical structure with an external flange, and its external dimensions are as follows: The design requires the weight to be controlled within 2.5kg, and the components must meet the requirements of 40g overload impact and 40kg load capacity. The existing metal servo base can no longer meet the requirements of product lightweighting and high strength. Summary of the Invention

[0005] Technical problems to be solved

[0006] To address the issues of heavy weight and complex processing procedures in existing metal servo base structures, this invention employs lightweight, high-strength carbon fiber composite materials to replace metal as the molding material for the servo base. Through the combined use of multiple sets of molds and a zoned layup and overall curing process, this invention proposes a new co-curing molding technology for radar all-carbon fiber servo bases with cap-shaped, T-shaped, and ring-reinforced structures, meeting the requirements for lightweight and high overload performance of airborne radar electronic chassis.

[0007] Technical solution

[0008] A molding die for a hat-shaped reinforced all-carbon fiber radar servo base is disclosed. The servo base consists of an outer flange, outer ring ribs, and a shell. The shell includes a lower shell end, a middle-lower shell end, a middle-upper shell end, an upper shell end, three circumferential T-ribs, and five axial hat-shaped ribs. The die is characterized by comprising four parts: a base plate mold, a middle-lower shell end mold, a middle-upper shell end mold, and a upper shell end mold. These four molding dies are assembled and positioned using locating pins. The base plate mold is a stepped cylindrical structure, comprising a bottom platform and a middle step. The bottom platform has a diameter 120mm larger than the outer flange diameter of the servo base and a thickness of 30mm. The geometry of the middle step matches the geometry of the inner surface of the lower shell end. The middle-lower shell end mold and the middle-upper shell end mold are both composite molds. Based on the structural shape of the middle-lower shell end and the spatial layout of the five hat-shaped ribs, each mold is radially divided into six separate molds. The six separate molds of the middle-lower shell end mold are assembled into a whole by screwing together two connecting rings. The middle-upper shell end mold... Six separate molds are assembled into a whole by screwing together a lower connecting ring 30. The external dimensions of the combined lower and upper molds are consistent with the geometric shapes of the inner surfaces of the lower and upper ends of the shell, respectively. To ensure demolding after part forming, a hollow inner ring structure with a diameter of r is provided in the middle of the lower and upper molds. When demolding after part forming, all the separate molds of the lower and upper molds are demolded along the direction from the center of the cap-shaped rib to the origin of the coordinate system. The sequence is as follows: Define the split mold facing one of the cap-shaped ribs as the X-axis. First, disassemble the split mold corresponding to the -X-axis, then disassemble the split mold corresponding to the X-axis, then disassemble the split molds corresponding to the left and right sides of the X-axis, and finally disassemble the remaining two split molds. The upper mold of the shell is a stepped cylindrical integral mold, including a lower stepped part and an upper stepped part. The outer dimensions of the upper step are consistent with the geometry of the inner surface of the upper shell, and the diameter of the upper stepped cylinder is consistent with the diameter of the outer surface of the upper shell, with a height of 30mm.

[0009] A further technical solution of the present invention: the base plate mold, the lower end mold of the shell, the upper end mold of the shell, and the upper end mold of the shell are all made of 45 steel.

[0010] A further technical solution of the present invention: The lower mold and the upper mold of the housing are provided with an inner ring structure of diameter r at their centers, where r is determined by the following formula:

[0011] And it satisfies:

[0012]

[0013] Where: R 外 R is the diameter of the inner surface of the lower or upper end of the shell, in mm.内 α is the inner diameter of the T-shaped rib at the lower or upper end of the shell, in mm; α is the angle between the lines connecting the two outermost points of the split mold and the center point in the X-axis direction, in degrees.

[0014] A method for molding a hat-shaped reinforced all-carbon fiber radar servo base, characterized by the following steps:

[0015] Step 1: Clean the base plate mold, the lower part of the six shell molds, the upper part of the six shell molds, the upper part of the shell mold, the lower connecting ring of the lower part of the shell mold, the upper connecting ring of the lower part of the shell mold, the lower connecting ring of the upper part of the shell mold, and the mold positioning pin with alcohol. After drying at room temperature, apply release agent to the surface at least twice, with an interval of at least 10 minutes.

[0016] Step 2: The lower split molds of the 6 housings are assembled by screwing together the lower connecting ring and the upper connecting ring; the upper split molds of the 6 housings are assembled by screwing together the lower connecting ring.

[0017] Step 3: After assembly, the lower mold and the upper mold of the shell are individually covered with cap-shaped inner skin, and the layering sequence is: (±45°) (织物) / 03 / 03 / (±45°) (织物) After the layering is completed, the processed cap-shaped foam is then laid on the cap-shaped rib skin;

[0018] Step 4: Lay the base inner skin separately on the bottom plate mold, the lower end mold of the shell, the upper end mold of the shell, and the upper end mold of the shell. The layering sequence is 90° / 0°3 / (±45°) / 0°3 / (±45°) / 0°3 / 90° / 0°. After the layering is completed, perform pre-compaction treatment.

[0019] Step 5: The base plate mold, the lower end mold of the shell, the upper end mold of the shell, and the upper end mold of the shell are assembled into a whole mold by positioning pins;

[0020] Step 6: First, lay the processed outer ring reinforcement foam on the overall mold assembled in Step 5, and then lay the base outer skin on the whole. The layering sequence is 0° / 90° / 0°3 / (±45°) / 0°3 / (±45°) / 0°3 / 90° / (±45°).

[0021] Step 7: Place the release film and breathable felt, make a vacuum bag, and autoclave it according to the curing parameters of the skin material;

[0022] Step 8: Remove the vacuum bag, breathable felt, and isolation film, and demold the molded servo base.

[0023] Step 9: Perform post-processing such as drilling and polishing on the demolded part to finally prepare the servo base.

[0024] A further technical solution of the present invention: the prepreg of the fabric in the layup is T300 carbon fiber epoxy material with a layer thickness of 0.25mm.

[0025] A further technical solution of the present invention: the unidirectional tape in the layup is T800 carbon fiber epoxy material with a layer thickness of 0.12mm.

[0026] Beneficial effects

[0027] This invention provides a molding die and method for a full carbon fiber radar servo base with a hat-shaped reinforced structure. By using a carbon fiber skin and rigid foam structure, the design accessibility and manufacturability of the internal hat-shaped ribs and external circumferential ribs carbon fiber structure within the servo base are achieved. Through a layering design method of partitioned layup followed by overall layup, the problem of difficult overall layup and co-curing of internal longitudinal and transverse reinforced carbon fiber components is effectively solved. The modular design and combined use of the molding die effectively solves the problem of difficult demolding of longitudinal and transverse reinforced carbon fiber components. Ultimately, a new co-curing molding technique for a full carbon fiber radar servo base with internal hat-shaped and T-shaped longitudinal and transverse reinforced structures and external circumferential rib structures is achieved. Verification using multiple sets of electronic chassis for a military product demonstrates that the full carbon fiber servo base prepared by this method is lightweight, has high mechanical strength, and exhibits stable and reliable quality. Attached Figure Description

[0028] The accompanying drawings are for illustrative purposes only and are not intended to limit the invention. Throughout the drawings, the same reference numerals denote the same parts.

[0029] Figure 1 Servo base structure diagram: (a) 3D view of the base; (b) cross-sectional view of the base layer;

[0030] Figure 2 Base plate mold structure diagram;

[0031] Figure 3 Lower end mold of the shell: (c) Exploded view of the lower end mold; (d) Assembled view of the lower end mold;

[0032] Figure 4 (e) Structural diagram of the upper part of the shell mold; (f) Detailed diagram of the upper part of the shell mold; (c) Assembly diagram of the upper part of the shell mold.

[0033] Figure 5 upper mold of the shell;

[0034] Figure 6 Schematic diagram of demolding the lower part of the shell split mold or the upper part of the shell mold;

[0035] Figure 7 The present invention relates to a molding schematic diagram.

[0036] In the diagram, 1-servo base; 2-outer flange; 3-outer ring rib; 4-shell; 5-lower end of shell; 6-lower middle end of shell; 7-upper middle end of shell; 8-upper end of shell; 9-first circumferential rib; 10-second circumferential rib; 11-third circumferential rib; 12-first cap-shaped rib; 13-second cap-shaped rib; 14-third cap-shaped rib; 15-fourth cap-shaped rib; 16-fifth cap-shaped rib; 17-base plate mold; 18-lower middle end mold of shell; 19-upper middle end mold of shell; 20-upper end of shell Mold; 21-Assembly positioning pin between molds; 22-Bottom platform of base plate mold; 23-Middle step of base plate mold; 24-Lower split mold of housing corresponding to negative X-axis; 25-Lower split mold of housing corresponding to positive X-axis; 26-Lower split mold of housing corresponding to the left side of positive X-axis; 27-Lower split mold of housing corresponding to the right side of positive X-axis; 28-Lower split mold of housing corresponding to the left side of negative X-axis; 29-Lower split mold of housing corresponding to the right side of negative X-axis; 30-Lower split mold of housing... 31-Lower connecting ring of the lower mold in the housing; 32-Upper split mold in the housing corresponding to the negative X-axis; 33-Upper split mold in the housing corresponding to the positive X-axis; 34-Upper split mold in the housing corresponding to the left side of the positive X-axis; 35-Upper split mold in the housing corresponding to the right side of the positive X-axis; 36-Upper split mold in the housing on the left side of the negative X-axis; 37-Upper split mold in the housing on the right side of the negative X-axis; 38-Lower connecting ring of the upper mold in the housing; 39-Upper mold of the housing. 40 - The lower step portion; 41 - The upper step portion of the upper mold of the shell; 42 - The inner skin of the cap rib; 43 - The foam of the cap rib; 44 - The inner skin of the base; 45 - The foam of the outer ring rib; 46 - The outer skin of the base; R_outer - The inner surface diameter of the lower or upper end of the shell; R_inner - The inner diameter of the circumferential T-shaped rib of the lower or upper end of the shell; α - The angle between the lines connecting the two outermost points and the center point on the split mold corresponding to the X-axis direction; Ⅰ, Ⅱ, Ⅲ, Ⅳ - The demolding sequence of the lower or upper mold of the shell. Detailed Implementation

[0037] To make the objectives, technical solutions, and advantages of this invention clearer, the invention will be further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative and not intended to limit the invention. Furthermore, the technical features involved in the various embodiments of this invention described below can be combined with each other as long as they do not conflict with each other.

[0038] This invention provides a molding die for a hat-shaped reinforced all-carbon fiber radar servo base. The servo base 1 consists of an outer flange 2, outer ring ribs 3, and a shell 4. The shell 4 includes a lower shell end 5, a lower middle shell end 6, a middle upper shell end 7, an upper shell end 8, three circumferential T-shaped ribs 9-11, and five axial hat-shaped ribs 12-16. The die includes four parts: a base plate die 17, a lower middle shell end die 18, a middle upper shell end die 19, and an upper shell end die 20. The four parts of the molding die are assembled and positioned by positioning pins 21. The base plate die 17 is a stepped cylindrical structure, including a bottom platform 22 and a middle step 23. The diameter of the bottom platform 22 is 120 mm larger than the diameter of the outer flange 2 of the servo base 1, and its thickness is 30 mm. The geometry of the middle step 23 is consistent with the geometry of the inner surface of the lower shell end 5. The lower end mold 18 of the shell is a combined mold. Based on the structural shape of the lower end 6 of the shell and the spatial layout of the five cap-shaped ribs 12-16, the lower end mold 18 is radially divided into six separate molds 24-29. These are then assembled into a whole by screwing together a lower connecting ring 30 and an upper connecting ring 31. The external dimensions of the assembled lower end mold 18 are consistent with the geometric shape of the inner surface of the lower end 6 of the shell. To achieve mold demolding capability, an inner ring structure with a diameter of r is provided at the center of the lower end mold 18. When demolding after the part is formed, the six separate molds 24 to 29 of the lower mold 18 in the shell are demolded along the direction from the center of their respective cap ribs (or the center of the separate molds) to the origin of the coordinate system. The demolding sequence is as follows: the separate mold facing one of the cap ribs is defined as the X-axis, that is, the direction pointed to by the separate mold 25 is the X-axis. First, the separate mold 24 corresponding to the -X-axis is disassembled, then the separate mold 25 corresponding to the X-axis is disassembled, then the separate molds 26 to 27 corresponding to the left and right sides of the X-axis are disassembled, and finally the remaining two separate molds 28 to 29 are disassembled. The upper mold 19 in the shell is a combined mold. According to the structural shape of the upper part 7 in the shell and the spatial layout of the five cap-shaped ribs 12 to 16, the upper mold 19 in the shell is divided into six separate molds 32 to 37 in the radial direction, and assembled into a whole by screwing together the connecting ring 38. The external dimensions of the combined upper mold 19 in the shell are consistent with the geometric shape of the inner surface of the upper part 7 in the shell. The middle part of the upper mold 19 in the shell is also provided with an inner ring structure with a diameter of r. Its demolding direction is the same as that of the lower mold 18 in the shell. The demolding sequence is as follows: first disassemble the separate mold 32 corresponding to the -X axis, then disassemble the separate mold 33 corresponding to the X axis, then disassemble the separate molds 34 to 35 corresponding to the left and right sides of the X axis, and finally disassemble the remaining two separate molds 36 to 37. The upper mold 20 of the shell is a stepped cylindrical integral mold, including a lower step part 39 and an upper step part 40. The outer dimensions of the upper step 39 are consistent with the geometry of the inner surface of the upper shell 8, and the diameter of the upper step 40 is consistent with the outer surface diameter of the upper shell 8, with a height of 30mm.The base plate mold 17, the lower end mold 18 of the shell, the upper end mold 19 of the shell, the upper end mold 20 of the shell, and the positioning pin 21 are all made of 45 steel.

[0039] This invention also provides a method for molding a hat-shaped reinforced all-carbon fiber radar servo base, comprising the following steps:

[0040] Step 1: Clean the base plate mold 17, the lower end split molds 24-29 of the 6 shells, the upper end split molds 32-37 of the 6 shells, the upper end mold 20 of the shell, the lower connecting ring 30 of the lower end mold 18 of the shell, the upper connecting ring 31 of the lower end mold 18 of the shell, the lower connecting ring 38 of the upper end mold 19 of the shell, and the mold positioning pin 21 with alcohol. After drying at room temperature, apply release agent to the surface at least twice, with an interval of at least 10 minutes.

[0041] Step 2: The lower split molds 24-29 of the 6 housings are assembled by screwing together the lower connecting ring 30 and the upper connecting ring 31; the upper split molds 32-37 of the 6 housings are assembled by screwing together the lower connecting ring 38.

[0042] Step 3: After assembly, the lower mold 18 and the upper mold 19 of the shell are individually covered with cap-shaped inner skin 41, and the layering sequence is: (±45°) (织物) / 03 / 03 / (±45°) (织物) After the layering is completed, the processed cap-shaped foam 42 is then laid on the cap-shaped foam skin 41.

[0043] Step 4: The base inner skin 43 is laid separately on the bottom plate mold 17, the lower end mold 18 of the shell, the upper end mold 19 of the shell, and the upper end mold 20 of the shell. The laying sequence is 90° / 0°3 / (±45°) / 0°3 / (±45°) / 0°3 / 90° / 0°. After the laying is completed, pre-compaction is performed.

[0044] Step 5: The base plate mold 17, the lower end mold 18 of the shell, the upper end mold 19 of the shell, and the upper end mold 20 of the shell are assembled into an integral mold by positioning pins 21;

[0045] Step 6: First, lay the processed outer ring reinforcement foam 44 on the overall mold assembled in Step 5, and then lay the base outer skin 45 as a whole. The layering sequence is 0° / 90° / 0°3 / (±45°) / 0°3 / (±45°) / 0°3 / 90° / (±45°).

[0046] Step 7: Make vacuum bags and autoclave them according to the curing parameters of the skin material;

[0047] Step 8: Remove the vacuum bag, breathable felt, isolation film and other auxiliary materials, and demold the formed servo base 1. The demolding sequence is as follows: first remove the bottom plate mold 17 downwards, then remove the upper shell mold 20 upwards, then remove the middle and lower mold 18, and finally remove the middle and upper mold 19. The demolding method and sequence of the middle and lower mold 18 is as follows: first remove the lower connecting ring 30, then remove the upper connecting ring 31, and disassemble the split molds 24, 25, 26-27, and 28-29 in sequence along the direction from the center of the cap rib to the coordinate origin. The demolding method and sequence of the middle and upper mold 19 is as follows: first remove the lower connecting ring 38, and disassemble the split molds 32, 33, 34-35, and 36-37 in sequence along the direction from the center of the cap rib to the coordinate origin.

[0048] Step 9: Perform post-processing such as drilling and polishing on the demolded part to finally prepare the servo base 1.

[0049] The prepreg of the fabric is T300 carbon fiber epoxy material with a single layer thickness of 0.25 mm.

[0050] The unidirectional tape is made of T800 carbon fiber epoxy material, with a single layer thickness of 0.12mm.

[0051] Example:

[0052] See appendix Figure 1 As shown, the servo base 1 is a carbon fiber laminated cylindrical structure with an internal cap-shaped and T-shaped longitudinal and transverse stiffening structure and an external ring-rib structure. It consists of an outer flange 2, an outer ring rib 3, and a shell 4. The shell 4 includes a lower shell end 5, a lower middle shell end 6, a middle upper shell end 7, an upper shell end 8, circumferential T-shaped ribs 9-11, and axial cap-shaped ribs 12-16. The external dimensions of the servo base 1 are as follows: The design requires the weight to be controlled within 2.5kg, and the parts must meet the requirements of 40g overload impact and 40kg load capacity.

[0053] See appendix Figure 2 As shown, the base plate mold 17 is a stepped cylindrical structure, including a bottom platform 22 and a middle step 23. The diameter of the bottom platform 22 is 120mm larger than the diameter of the outer flange 2 of the servo base 1, and the thickness is 30mm. The geometry of the middle step 23 is consistent with the geometry of the inner surface of the lower end 5 of the housing.

[0054] See appendix Figure 3As shown, the lower end mold 18 of the shell is a combined mold. According to the structural shape of the lower end 6 of the shell and the spatial layout of the five cap-shaped ribs 12 to 16, the lower end mold 18 is divided into six separate molds 24 to 29 in the radial direction, and assembled into a whole by screwing together the lower connecting ring 30 and the upper connecting ring 31. The external dimensions of the combined lower end mold 18 of the shell are consistent with the geometric shape of the inner surface of the lower end 6 of the shell.

[0055] See appendix Figure 4 As shown, the upper mold 19 in the shell is a combined mold. According to the structural shape of the upper part 7 in the shell and the spatial layout of the five cap-shaped ribs 12 to 16, the upper mold 19 in the shell is divided into six separate molds 32 to 37 in the radial direction, and assembled into a whole by screwing together the connecting ring 38. The external dimensions of the combined upper mold 19 in the shell are consistent with the geometric shape of the inner surface of the upper part 7 in the shell.

[0056] See appendix Figure 5 As shown, the upper mold 20 of the shell is a stepped cylindrical integral mold, including a lower step part 39 and an upper step part 40. The outer dimensions of the upper step 39 are consistent with the geometry of the inner surface of the upper shell 8, and the diameter of the upper step 40 is consistent with the outer surface diameter of the upper shell 8, with a height of 30mm.

[0057] See appendix Figure 6 and attached Figure 7 As shown, the demolding sequence of the servo base 1 molding mold is as follows: first, remove the bottom plate mold 17 downwards, then remove the upper shell mold 20 upwards, then remove the middle and lower mold 18, and finally remove the middle and upper mold 19. The demolding method and sequence of the middle and lower mold 18 is as follows: first, remove the lower connecting ring 30, then remove the upper connecting ring 31, and then, along the direction from the center of the cap-shaped rib to the coordinate origin, disassemble the split molds 24, 25, 26-27, and 28-29 in sequence. The demolding method and sequence of the middle and upper mold 19 is as follows: first, remove the lower connecting ring 38, and along the direction from the center of the cap-shaped rib to the coordinate origin, disassemble the split molds 32, 33, 34-35, and 36-37 in sequence.

[0058] In this embodiment, the inner ring diameter r of the lower middle mold 18 and the upper middle mold 19 is determined by the following formula:

[0059] And it satisfies:

[0060]

[0061] In the formula: R 外 R is the inner surface diameter (in mm) of the lower end 6 or the upper end 7 of the shell; 内α is the inner diameter of the T-shaped rib at the lower end 6 or the upper end 7 of the shell (unit: mm); α is the angle between the lines connecting the two outermost points of the split mold 25 or 33 and the center point in the X-axis direction (unit: degrees).

[0062] The base plate mold 17, the lower end mold 18 of the shell, the upper end mold 19 of the shell, the upper end mold 20 of the shell, and the positioning pin 21 are all made of 45 steel.

[0063] The preparation process used to achieve the purpose of this invention includes the following steps:

[0064] Step 1: Clean the base plate mold 17, the lower part of the shell split mold 24-29, the upper part of the shell split mold 32-37, the upper part of the shell mold 20, the lower connecting ring 30, the upper connecting ring 31, the lower connecting ring 38, and the mold positioning pin 21 with alcohol. After drying at room temperature, apply release agent to the surface at least twice, with an interval of at least 10 minutes.

[0065] Step 2: The middle and lower split molds 24-29 are assembled by screwing together the lower connecting ring 30 and the upper connecting ring 31, and the middle and upper split molds 32-37 are assembled by screwing together the lower connecting ring 38.

[0066] Step 3: After assembly, the lower mold 18 and the upper mold 19 of the shell are individually covered with cap-shaped inner skin 41, and the layering sequence is: (±45°) (织物) / 03 / 03 / (±45°) (织物) After the layering is completed, the processed cap-shaped foam 42 is then laid on the cap-shaped foam skin 41.

[0067] Step 4: The base inner skin 43 is laid separately on the bottom plate mold 17, the lower end mold 18 of the shell, the upper end mold 19 of the shell, and the upper end mold 20 of the shell. The laying sequence is 90° / 0°3 / (±45°) / 0°3 / (±45°) / 0°3 / 90° / 0°. After the laying is completed, pre-compaction is performed.

[0068] Step 5: The base plate mold 17, the lower end mold 18 of the shell, the upper end mold 19 of the shell, and the upper end mold 20 of the shell are assembled into an integral mold by positioning pins 21;

[0069] Step 6: First, lay the processed outer ring reinforcement foam 44 on the overall mold assembled in Step 5, and then lay the base outer skin 45 as a whole. The layering sequence is 0° / 90° / 0°3 / (±45°) / 0°3 / (±45°) / 0°3 / 90° / (±45°).

[0070] Step 7: Place the release film and breathable felt, make a vacuum bag, and autoclave it according to the curing parameters of the skin material;

[0071] Step 8: Remove the vacuum bag, breathable felt, and isolation film, and demold the molding mold. The demolding sequence is as follows: first, remove the bottom plate mold 17 downwards, then remove the upper shell mold 20 upwards, then remove the middle and lower mold 18, and finally remove the middle and upper mold 19. The demolding method and sequence for the middle and lower mold 18 is as follows: first, remove the lower connecting ring 30, then remove the upper connecting ring 31, and disassemble the split molds 24, 25, 26-27, and 28-29 in sequence along the direction from the center of the cap-shaped rib to the coordinate origin. The demolding method and sequence for the middle and upper mold 19 is as follows: first, remove the lower connecting ring 38, and disassemble the split molds 32, 33, 34-35, and 36-37 in sequence along the direction from the center of the cap-shaped rib to the coordinate origin.

[0072] Step 9: Perform post-processing such as drilling and polishing on the demolded part to finally prepare the servo base 1.

[0073] The fabric prepreg (±45°) in the layup is T300 carbon fiber epoxy material with a single layer thickness of 0.25mm.

[0074] The unidirectional strip (0° / 90° / 0°3 / ) in the layup is made of T800 carbon fiber epoxy material, with a single layer thickness of 0.12 mm.

[0075] The above description is merely a specific embodiment of the present invention, but the scope of protection of the present invention is not limited thereto. Any person skilled in the art can easily conceive of various equivalent modifications or substitutions within the scope of the technology disclosed in the present invention, and such modifications or substitutions should all be covered within the scope of protection of the present invention.

Claims

1. A molding die for a hat-shaped reinforced all-carbon fiber radar servo base, wherein the servo base comprises an outer flange, an outer ring rib, and a shell, wherein the shell includes a lower end, a lower middle end, an upper middle end, an upper end, three circumferential T-ribs, and five axial hat-shaped ribs; characterized in that... The system comprises four parts: a base plate mold (17), a lower end mold (18), an upper end mold (19), and an upper end mold (20). The four mold parts are assembled and positioned by positioning pins. The base plate mold (17) is a stepped cylindrical structure, consisting of a bottom platform and a middle step. The diameter of the bottom platform is 120mm larger than the diameter of the outer flange of the servo base, and the thickness is 30mm. The geometry of the middle step is consistent with the geometry of the inner surface of the lower end of the shell. The lower end mold (18) and the upper end mold (19) are both combined molds. According to the structural shape of the lower end and upper end of the shell and the spatial layout of the five cap-shaped ribs, each mold is divided into six separate molds in the radial direction. The six separate molds of the lower end mold (18) are assembled into a whole by screwing together the upper and lower connecting rings. The six separate molds of the upper end mold (19) are assembled into a whole by screwing together the lower connecting ring. The combined lower end mold and upper end mold are assembled into a whole by screwing together the outer surface of the upper end mold. The dimensions are consistent with the geometric shape of the inner surface of the lower end and the upper end of the shell, respectively. In order to achieve the demoldability of the mold after the part is formed, a hollow inner ring structure is set in the middle part of the lower end mold (18) and the upper end mold (19) of the shell. The inner ring diameter is r. When the part is demolded after forming, all the split molds of the lower end mold (18) and the upper end mold (19) of the shell are demolded along the direction from the center of the cap rib to the origin of the coordinate. The demolding sequence is as follows: the split mold facing one of the cap ribs is defined as the X-axis. First, the split mold corresponding to the -X-axis is disassembled, then the split mold corresponding to the X-axis is disassembled, then the split molds corresponding to the left and right sides of the X-axis are disassembled, and finally the remaining two split molds are disassembled. The upper end mold (20) of the shell is a stepped cylindrical integral mold, including a lower step part and an upper step part. The outer dimensions of the upper step are consistent with the geometric shape of the inner surface of the upper end of the shell. The diameter of the upper step cylinder is consistent with the diameter of the outer surface of the upper end of the shell, and the height is 30mm. The lower mold (18) and upper mold (19) of the housing are provided with an inner ring structure of diameter r at their center, where r is determined by the following formula: And satisfy: Where: R 外 R is the inner surface diameter of the lower end (6) or upper end (7) of the shell, in mm. 内 α is the inner diameter of the T-shaped rib at the lower end (6) or upper end (7) of the shell, in mm; α is the angle between the line connecting the two outermost points of the split mold and the center point in the X-axis direction, in degrees.

2. The molding die for a hat-shaped reinforced all-carbon fiber radar servo base according to claim 1, characterized in that: The base plate mold (17), the lower end mold (18), the upper end mold (19), and the upper end mold (20) of the shell are all made of 45 steel.

3. A method for forming a hat-shaped reinforced all-carbon fiber radar servo base using the mold described in claim 1, characterized in that... The steps are as follows: Step 1: Clean the base plate mold (17), the six lower split molds of the shell, the six upper split molds of the shell, the upper mold (20) of the shell, the lower connecting ring (30) of the lower mold (18) of the shell, the upper connecting ring (31) of the lower mold (18) of the shell, the lower connecting ring (38) of the upper mold (19) of the shell, and the mold positioning pin (21) with alcohol. After drying at room temperature, apply release agent to the surface at least twice, with an interval of at least 10 minutes. Step 2: The lower split molds of the 6 housings are assembled by screwing together the lower connecting ring (30) and the upper connecting ring (31), and the upper split molds of the 6 housings are assembled by screwing together the lower connecting ring (38); Step 3: After assembly, the lower mold (18) and upper mold (19) of the shell are respectively covered with cap-shaped inner skin (41), and the layering sequence is: (±45°) （织物） / 03 / 03 / (±45°) （织物） After the layering is completed, the processed cap-shaped rib skin (41) is then laid on the cap-shaped rib skin (42). Step 4: The base inner skin (43) is laid separately on the bottom plate mold (17), the lower end mold (18) of the shell, the upper end mold (19) of the shell and the upper end mold (20) of the shell. The laying sequence is 90° / 0°3 / (±45°) / 0°3 / (±45°) / 0°3 / 90° / 0°. After the laying is completed, pre-compaction treatment is performed. Step 5: The base plate mold (17), the lower end mold of the shell (18), the upper end mold of the shell (19), and the upper end mold of the shell (20) are assembled into an integral mold by positioning pins (21); Step 6: First, lay the processed outer ring reinforcement foam (44) on the overall mold after Step 5 assembly, and then lay the base outer skin (45) as a whole. The layering sequence is 0° / 90° / 0°3 / (±45°) / 0°3 / (±45°) / 0°3 / 90° / (±45°). Step 7: Place the release film and breathable felt, make a vacuum bag, and autoclave it according to the curing parameters of the skin material; Step 8: Remove the vacuum bag, breathable felt, and isolation film, and demold the molded servo base (1); Step 9: Perform post-processing such as drilling and polishing on the demolded part to finally prepare the servo base (1).

4. The molding method of a hat-shaped reinforced all-carbon fiber radar servo base according to claim 3, characterized in that: The prepreg in the layup is T300 carbon fiber epoxy material with a layer thickness of 0.25mm.

5. The molding method of a hat-shaped reinforced all-carbon fiber radar servo base according to claim 4, characterized in that: The unidirectional tape in the layup is made of T800 carbon fiber epoxy material with a layer thickness of 0.12 mm.

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