A correction tool and method for wave-absorbing honeycomb manufacturing

Abstract

The application belongs to the technical field of aviation honeycomb manufacturing, and discloses a correcting tool and method for wave-absorbing honeycomb manufacturing, which comprises a base frame, a clamping and fixing unit, a three-dimensional adjusting mechanism and an X-direction adjusting module. The base frame comprises four X-direction aluminum profiles, eight Y-direction aluminum profiles, five Z-direction aluminum profiles and four groups of high-temperature universal wheels, and the wave-absorbing honeycomb is arranged in the base frame. The clamping and fixing unit comprises eight angle aluminum profiles and is used for positioning the wave-absorbing honeycomb. The three-dimensional adjusting mechanism comprises 16 groups of Z-direction adjusting modules and is used for clamping and fixing the wave-absorbing honeycomb together with the clamping and fixing unit. The X-direction adjusting module comprises six Z-direction stainless steel rollers, and the wave-absorbing honeycomb slides in parallel in the X direction by means of the stainless steel rollers.

Description

Technical Field

[0001] This invention belongs to the field of aerospace cellular manufacturing technology, and relates to a correction tooling and method for absorbing cellular manufacturing. Background Technology

[0002] Aramid paper honeycomb composites, with their low density, high strength, and good impact resistance, along with advantages such as vibration reduction, wave transmission, and strong design flexibility, are now widely used in aerospace and high-speed trains, gradually replacing earlier metal honeycomb materials in certain structural components to achieve weight reduction and speed improvement. With the widespread application of aramid honeycomb composites, researchers are increasingly focusing on multifunctional honeycomb materials, such as radar-absorbing honeycombs and thermally conductive honeycombs with high thermal conductivity. As the core material for many stealth structural components of aircraft, radar-absorbing honeycombs play a crucial role in improving the overall stealth performance of aircraft; therefore, the related manufacturing technology for radar-absorbing honeycombs is strictly controlled by foreign countries. Domestic radar-absorbing honeycombs have made significant progress over the past few decades. Most of these honeycombs are produced using a solution impregnation method, which is simple, stable, and economical. Impregnated radar-absorbing honeycombs: using a wave-transparent honeycomb as the substrate, radar-absorbing adhesives with different electromagnetic properties are prepared by adjusting the ratio of absorbents. The distribution of the radar-absorbing adhesive on the surface of the honeycomb substrate is controlled by regulating the impregnation process. This type of absorbing cell technology is relatively mature, has less dependence on cell substrate, can be quickly transferred between different substrates, has a short production cycle, is suitable for large-scale production of large-size cells, and has already been widely used.

[0003] However, for multifunctional honeycomb structures such as microwave absorbing honeycombs, various fillers need to be added to the impregnation solution to achieve the aforementioned functions such as microwave absorption and heat conduction. Repeated impregnation and drying, under high-temperature conditions and after cooling, can cause instability in the honeycomb pore state and varying stress levels, resulting in inconsistent pore regularity and different bending patterns throughout the entire honeycomb structure. This affects the uniformity of the honeycomb's density. This deformation not only affects the honeycomb's processability but, in severe cases, can even impair its functionality.

[0004] Traditional orthodontic methods typically fall into the following categories, but each has its drawbacks. For example: (1) The honeycomb deformation is manually bent and corrected before entering the oven. Disadvantage: It is impossible to confirm in real time whether the honeycomb deformation has been effectively corrected.

[0005] (2) Physical intervention is carried out by pressing against the area with the greatest deformation during the purification process. Disadvantage: Not suitable for thicker honeycomb structures with high stress.

[0006] (3) Use tape to bind the deformed area and push it into the oven for correction. Disadvantage: This method can effectively correct the deformation during the heating process of the honeycomb drying rod, but it does not meet the requirement that the circulating air direction of the existing oven is perpendicular to the L-direction of the honeycomb. Summary of the Invention

[0007] This invention addresses the problem of deformation caused by temperature changes during the impregnation and drying processes of absorbing honeycomb, which affects the uniformity of the honeycomb's density, mechanical properties, and the feasibility of subsequent machining. It provides a correction fixture and method for manufacturing absorbing honeycomb, which applies correction pressure during high-temperature drying and cooling after impregnation to prevent significant deformation of the honeycomb under temperature changes, thereby maintaining the uniformity of the honeycomb's density and the manufacturability of the machining process.

[0008] In a first aspect, the technical solution of the present invention provides a correction fixture for the manufacturing of absorbing cell, comprising: a base frame, a set of clamping and fixing units, a set of three-dimensional adjustment mechanisms, and an X-axis adjustment module; A base frame includes 4 X-direction aluminum profiles 3, 8 Y-direction aluminum profiles 2, 5 Z-direction aluminum profiles 1, 4 sets of high-temperature universal wheels 6, and a wave-absorbing honeycomb placed inside the base frame; A set of clamping and fixing units includes 8 angle aluminum 4, which are used to position the absorbing cell; A set of three-dimensional adjustment mechanisms includes 16 sets of Z-axis adjustment modules 7, which are used together with the clamping and fixing components to clamp and fix the absorbing cell. The X-axis adjustment module includes six Z-axis stainless steel rollers 5, and the wave-absorbing honeycomb slides parallel in the X-axis by means of the stainless steel rollers.

[0009] Furthermore, the Z-axis adjustment module 7 consists of a 405mm long M16 threaded rod with a stainless steel end welded to the top and matching fastening components. The fastening components are used to install the Z-axis adjustment module onto the base frame.

[0010] Furthermore, the X-axis aluminum profile 3 is a 40mm*40mm aluminum profile with a length of 2500mm; The Y-axis aluminum profile 2 is a 40mm*40mm aluminum profile with a length of 1300mm; The Z-direction aluminum profile 1 is a 40mm*40mm aluminum profile with a length of 470mm.

[0011] Furthermore, the angle aluminum 4 is L40*40mm, used to clamp and fix the absorbing honeycomb, and to limit its movement in the Z direction.

[0012] Furthermore, the stainless steel roller 5 has a roller surface length of 460mm and a shaft diameter of φ8mm.

[0013] Furthermore, the high-temperature omnidirectional wheel 6 has a height of 110mm and a wheel diameter of 75mm.

[0014] On the other hand, the present invention also provides a correction method for manufacturing absorbing cell structures, which is implemented using the aforementioned correction fixture, the method comprising: (1) Place the absorbing cell vertically in the L direction into the straightening fixture, and adjust the X direction position of the absorbing cell with the help of the stainless steel roller; (2) Make one end of the absorbing honeycomb contact the L40*40mm angle aluminum to limit it in the Z direction; (3) Tighten the M16 threaded rod in the Z-axis adjustment module so that its stainless steel end contacts the other end of the absorbing cell to clamp and fix the absorbing cell; (4) Based on the deformation and verticality of the absorbing honeycomb, the deformation and verticality of the absorbing honeycomb are finely adjusted by screwing the threaded rods of each Z-axis adjustment module into different sizes. (5) After adjustment, the wave-absorbing honeycomb along with the straightening fixture is pushed into the drying oven for drying and curing process using the casters.

[0015] Furthermore, the method also includes: After the drying and curing process is completed, the microwave absorbing honeycomb along with the straightening fixture is pushed out of the oven using casters. The M16 threaded rod of the Z-axis adjustment module is loosened, and the microwave absorbing honeycomb is removed from the side of the straightening fixture using stainless steel rollers for the next step.

[0016] The technical solution provided by this invention can solve the problems of appearance quality and performance degradation caused by deformation of absorbing honeycomb cells. It can greatly improve product yield, save costs, and increase production efficiency. Attached Figure Description

[0017] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. The drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0018] Figure 1 This is a schematic diagram of the overall structure of a straightening fixture used in the manufacture of absorbing cell membranes. Figure 2 This is a rear view of a straightening fixture used in the manufacture of absorbing cell structures; Figure 3 This is a bottom view of a straightening fixture used in the manufacture of microwave absorbing cells; Figure 4 This is a rear view of a straightening fixture used in the manufacture of absorbing cell structures. Detailed Implementation

[0019] The present invention will be further described in detail below with reference to the embodiments and accompanying drawings, but the embodiments of the present invention are not limited thereto.

[0020] This invention provides a straightening fixture for use in the manufacturing of absorbing cell structures, such as... Figure 1-4 As shown, the fixture includes one base frame, one set of clamping and fixing units, and one set of three-dimensional adjustment mechanisms. The base frame consists of four 40mm*40mm aluminum profiles 3 (approximately 2500mm long in the X direction), eight 40mm*40mm aluminum profiles 2 (approximately 1300mm long in the Y direction), five 40mm*40mm aluminum profiles 1 (approximately 470mm long in the Z direction), and four sets of 3-inch 200°C high-temperature resistant casters 6 for supporting the movement and straightening of the fixture. These components together form the base frame. The clamping and fixing unit includes eight L40*40mm angle aluminum profiles 4, used to clamp and fix the absorbing cell and provide Z-axis limiting. One set of three-dimensional adjustment mechanisms includes 16 sets of Z-axis adjustment modules 7. Each Z-axis adjustment module consists of a 405mm long M16 threaded rod with a stainless steel end welded to the top and matching fastening components. The fastening components are used to install the Z-axis adjustment module onto the base frame. The X-axis adjustment module includes 6 Z-axis φ25 stainless steel rollers 5 with a roller surface length of 460mm and a shaft diameter of φ8mm. The honeycomb structure can slide parallel in the X-axis direction with the help of the stainless steel rollers.

[0021] After using this fixture, the method for correcting and fixing the microwave absorbing honeycomb before it enters the drying oven is as follows: (1) Place the honeycomb vertically in the L direction into the straightening fixture, and adjust the X direction position of the honeycomb with the help of the stainless steel roller; (2) Make one end of the honeycomb contact the L40*40mm angle aluminum to limit it in the Z direction; (3) Screw in the M16 threaded rod in the Z-axis adjustment module so that its stainless steel end contacts the other end of the honeycomb to clamp and fix the honeycomb; (4) Based on the deformation and perpendicularity of the honeycomb, the deformation and perpendicularity of the honeycomb are finely adjusted by screwing the threaded rods of each Z-axis adjustment module into different sizes; (5) After all adjustments are completed, the honeycomb and the straightening fixture are pushed into the oven for drying and curing with the help of the casters.

[0022] The overall structure is capable of withstanding high temperatures up to 200℃, and can be used for deformation correction during the drying and curing process of microwave absorbing honeycomb at temperatures of 200℃ and below.

[0023] The above detailed embodiments are a description of the present invention. It should not be considered that the specific embodiments of the present invention are limited to these descriptions. For those skilled in the art, several simple deductions and substitutions can be made without departing from the concept of the present invention, and all of these should be considered to fall within the protection scope of the present invention.

Claims

1. A straightening fixture for use in the manufacture of absorbing cell structures, characterized in that, include: A base frame, a set of clamping and fixing units, a set of three-dimensional adjustment mechanisms, and an X-axis adjustment module; A base frame includes 4 X-direction aluminum profiles (3), 8 Y-direction aluminum profiles (2), 5 Z-direction aluminum profiles (1), 4 sets of high-temperature universal wheels (6), and a wave-absorbing honeycomb placed inside the base frame; A set of clamping and fixing units includes 8 angle aluminum (4) for positioning the absorbing cell; A set of three-dimensional adjustment mechanisms includes 16 sets of Z-axis adjustment modules (7) for clamping and fixing the absorbing cell together with the clamping and fixing components; The X-axis adjustment module includes six Z-axis stainless steel rollers (5), and the wave-absorbing honeycomb slides parallel to each other in the X-axis by means of the stainless steel rollers.

2. The straightening fixture for absorbing cell manufacturing according to claim 1, characterized in that, The Z-axis adjustment module (7) consists of a stainless steel end welded to the top of an M16 threaded rod with a length of 405mm and matching fastening components. The fastening components are used to install the Z-axis adjustment module onto the base frame.

3. The straightening fixture for absorbing cell manufacturing according to claim 1, characterized in that, The X-direction aluminum profile (3) is a 40mm*40mm aluminum profile with a length of 2500mm; The Y-axis aluminum profile (2) is a 40mm*40mm aluminum profile with a length of 1300mm; The Z-direction aluminum profile (1) is a 40mm*40mm aluminum profile with a length of 470mm.

4. A straightening fixture for manufacturing absorbing cell structures according to claim 1, characterized in that, The angle aluminum (4) is L40*40mm and is used to clamp and fix the absorbing honeycomb and to limit it in the Z direction.

5. A straightening fixture for manufacturing absorbing cell according to claim 1, characterized in that, The stainless steel roller (5) has a roller surface length of 460mm and a shaft diameter of φ8mm.

6. A straightening fixture for manufacturing absorbing cell structures according to claim 1, characterized in that, The high-temperature universal wheel (6) has a height of 110mm and a wheel diameter of 75mm.

7. A correction method for use in the manufacture of absorbing cell structures, characterized in that, The method, implemented using the straightening fixture as described in any one of claims 1-6, comprises: (1) Place the absorbing cell vertically in the L direction into the straightening fixture, and adjust the X direction position of the absorbing cell with the help of the stainless steel roller; (2) Make one end of the absorbing honeycomb contact the L40*40mm angle aluminum to limit it in the Z direction; (3) Tighten the M16 threaded rod in the Z-axis adjustment module so that its stainless steel end contacts the other end of the absorbing cell to clamp and fix the absorbing cell; (4) Based on the deformation and verticality of the absorbing honeycomb, the deformation and verticality of the absorbing honeycomb are finely adjusted by screwing the threaded rods of each Z-axis adjustment module into different sizes. (5) After adjustment, the wave-absorbing honeycomb along with the straightening fixture is pushed into the drying oven for drying and curing process using the casters.

8. A correction method for absorbing cell manufacturing according to claim 7, characterized in that, The method further includes: After the drying and curing process is completed, the microwave absorbing honeycomb along with the straightening fixture is pushed out of the oven using casters. The M16 threaded rod of the Z-axis adjustment module is loosened, and the microwave absorbing honeycomb is removed from the side of the straightening fixture using stainless steel rollers for the next step.

Images