A milling device and a honeycomb core structure forming method

Abstract

The application provides a milling device and a honeycomb core structure forming method, and relates to the technical field of composite material forming. The method comprises the following steps: fixing a honeycomb core blank at a working position; using a vertical milling cutter to mill the honeycomb core blank to obtain a honeycomb core structure base body with a preset structure; using the cutting edge of an insert milling cutter head to align the honeycomb core edge on one side of the honeycomb core structure base body, and performing insert milling along the honeycomb core axial direction to cut off the burrs of the honeycomb core edge; moving the insert milling cutter along the arrangement direction of the honeycomb core to completely remove the burrs on the outer side of the honeycomb core structure base body to obtain a honeycomb core structure, wherein the head of the insert milling cutter is located at one end of the honeycomb core axial direction, so that the cutting edge corresponds to the burrs. Therefore, the burr removal no longer depends on manual trimming, but is automatically completed through insert milling cutter processing, so that the edge processing quality can be improved, and the production efficiency of the aramid paper honeycomb core structure is improved.

Description

Technical Field

[0001] This application relates to the field of composite material molding technology, and more specifically, to a milling device and a method for molding honeycomb core structures. Background Technology

[0002] With the rapid development of modern aviation technology and the urgent need for low cost and environmental protection in the aviation industry, composite materials are highly favored by the aviation industry due to their superior comprehensive performance. Among many composite materials, aramid paper is one of the lightweight composite materials widely used in the aviation industry. Aramid paper honeycomb core structures prepared from aramid paper have high axial strength, specific stiffness, and lower density, good axial compressive strength, and excellent sound insulation performance. In addition, the chemical inertness brought by the fiber load-bearing and pulp filling characteristics of aramid paper allows it to self-extinguish immediately after being removed from a fire source, and it has good thermal insulation, temperature resistance, electrical insulation, and electromagnetic wave transmission properties. Therefore, it is widely used in the leading edge, trailing edge, tail, flaps, and other structural components of aircraft.

[0003] Currently, aramid paper honeycomb core structures are formed by milling on machine tools. After processing, the edges of the aramid paper honeycomb core structures are rough, which requires manual trimming to remove the rough edges, thus reducing the production efficiency of aramid paper honeycomb core structures. Summary of the Invention

[0004] The purpose of this application is to address the shortcomings of the prior art by providing a milling device and a method for forming honeycomb core structures, thereby solving the problem of low burr removal efficiency and reduced production efficiency in the prior art.

[0005] To achieve the above objectives, the technical solutions adopted in the embodiments of this application are as follows: One aspect of this application provides a method for forming a honeycomb core structure, comprising: fixing a honeycomb core blank in a working position; milling the honeycomb core blank with an end mill to obtain a honeycomb core structure substrate with a preset structure; using a plunge milling cutter to align the cutting edge of the plunge milling cutter with the edge of the honeycomb core on one side of the honeycomb core structure substrate, and plunge milling along the honeycomb core axis to remove burrs from the edge of the honeycomb core; moving the plunge milling cutter along the arrangement direction of the honeycomb core to completely remove burrs from the outer side of the honeycomb core structure substrate to obtain a honeycomb core structure, wherein the plunge milling cutter head is located at one end of the honeycomb core axis so that the cutting edge corresponds to the burrs.

[0006] Optionally, the cutting edge is in the form of a ring with its ends connected, and a chip cavity is formed inside the ring. The cutting edge of the end mill is aligned with the edge of the honeycomb core on one side of the honeycomb core structure substrate, and the end mill is milled along the honeycomb core axis to remove the burrs on the edge of the honeycomb core. The method further includes: some of the debris generated by the cutting edge removing the burrs is placed in the chip cavity.

[0007] Optionally, before using a dip milling cutter to cut the burrs on the edge of the honeycomb core on one side of the honeycomb core structure substrate and dip milling along the honeycomb core axis to remove the burrs on the edge of the honeycomb core, the method further includes: using a disc milling cutter to cut the burrs radially along the honeycomb core to cut the burrs into multiple segments.

[0008] Optionally, the cutting edge of a plunger is aligned with the edge of the honeycomb core on one side of the honeycomb core structure substrate, and plunge milling is performed along the honeycomb core axis to remove burrs from the edge of the honeycomb core. After moving the plunger along the arrangement direction of the honeycomb core to completely remove the burrs on the outside of the honeycomb core structure substrate to obtain the honeycomb core structure, the method further includes: using high-pressure gas to blow away the burrs that have fallen off during the plunge milling.

[0009] In another aspect of this application, a milling apparatus is provided for use in the above-described honeycomb core structure forming method. The milling apparatus includes a milling cutter, which includes a fixedly connected shank and a cutter head, and the end of the cutter head away from the shank has a cutting edge.

[0010] Optionally, the cutting edge is arc-shaped.

[0011] Optionally, the cutting edge is in the form of a ring with its ends connected, and a chip cavity is formed inside the ring.

[0012] Optionally, the milling cutter also includes multiple chip removal holes, which are located at the end of the cutter head away from the cutting edge and are all connected to the chip cavity. The multiple chip removal holes are evenly distributed along the periphery of the cutter head.

[0013] Optionally, the cutting edge has an outer sidewall and an inner sidewall, with the angle between the outer sidewall and the inner sidewall being 10° to 20°.

[0014] Optionally, the milling device also includes a base, an end mill, a wafer cutter, a tool changer assembly, and a purging assembly. The end mill, end mill, and wafer cutter are fixedly connected to the tool changer assembly, which is connected to the base and drives the tool changer assembly to move, thereby switching between the end mill, end mill, or wafer cutter. The purging assembly is connected to the base.

[0015] The beneficial effects of this application include: This application provides a method for forming a honeycomb core structure, comprising: fixing a honeycomb core blank in a working position; milling the honeycomb core blank with an end mill to obtain a honeycomb core structure substrate with a preset structure; using a plunge milling cutter, aligning the cutting edge of the plunge milling cutter with the edge of the honeycomb core on one side of the honeycomb core substrate, and plunge milling along the honeycomb core axis to remove burrs from the edge of the honeycomb core; moving the plunge milling cutter along the arrangement direction of the honeycomb core to completely remove burrs from the outer side of the honeycomb core substrate to obtain a honeycomb core structure, wherein the plunge milling cutter head is located at one end of the honeycomb core axis so that the cutting edge corresponds to the burrs. As can be seen from the above process, this application integrates the burr removal operation into the forming process of the honeycomb core structure, and uses plunge milling to align the cutting edge of the plunge milling cutter head with the burrs at the edge of the honeycomb core, removing the burrs along the honeycomb core axis. Thus, burr removal no longer relies on manual trimming, but is automatically completed by the plunge milling cutter, thereby improving the edge processing quality and increasing the production efficiency of aramid paper honeycomb core structures. Attached Figure Description

[0016] To more clearly illustrate the technical solutions of the embodiments of this application, the accompanying drawings used in the embodiments will be briefly introduced below. It should be understood that the following drawings only show some embodiments of this application and should not be regarded as a limitation of the scope. For those skilled in the art, other related drawings can be obtained based on these drawings without creative effort.

[0017] Figure 1 One of the schematic flowcharts of a method for forming a honeycomb core structure is provided in an embodiment of this application; Figure 2 This is one of the structural schematic diagrams of a honeycomb core structure molding method provided in the embodiments of this application; Figure 3 A second schematic flowchart illustrating a method for forming a honeycomb core structure according to an embodiment of this application; Figure 4 This is a schematic diagram of the structure of the end mill provided in the embodiments of this application; Figure 5 This is a second structural schematic diagram of a method for forming a honeycomb core structure provided in an embodiment of this application.

[0018] Icons: 100-Honeycomb core structure base; 200-End mill; 210-Cutter head; 211-Cutting edge; 211a-Outer wall; 211b-Inner wall; 212-Chip cavity; 220-Tool holder; 230-Chip removal hole; 300-End mill; 400-Bulk; 410-Sub-bulk. Detailed Implementation

[0019] To make the objectives, technical solutions, and advantages of the embodiments of this application clearer, the technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this application, and not all embodiments. The components of the embodiments of this application described and shown in the accompanying drawings can generally be arranged and designed in various different configurations.

[0020] Therefore, the following detailed description of the embodiments of this application provided in the accompanying drawings is not intended to limit the scope of the claimed application, but merely to illustrate selected embodiments of the application. It should be noted that, unless otherwise specified, the various features in the embodiments of this application can be combined with each other, and the combined embodiments are still within the protection scope of this application.

[0021] It should be noted that similar labels and letters in the following figures indicate similar items. Therefore, once an item is defined in one figure, it does not need to be further defined and explained in subsequent figures.

[0022] In the description of this application, it should be noted that the terms "center," "upper," "lower," "vertical," "horizontal," "inner," and "outer," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, or the orientation or positional relationship commonly used when the product is in use. They are used only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this application. In addition, the terms "first," "second," and "third," etc., are used only to distinguish descriptions and should not be construed as indicating or implying relative importance.

[0023] In the description of this application, it should also be noted that, unless otherwise expressly specified and limited, the terms "set up," "install," "connect," and "link" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this application based on the specific circumstances.

[0024] One aspect of the embodiments of this application, such as Figure 1 and Figure 2 As shown, a method for molding a honeycomb core structure is provided, including: S100: The honeycomb core blank is fixed in the working position.

[0025] The honeycomb core blank is made of aramid paper through processes such as gluing, lamination, stretching, and shaping. It has an overall honeycomb structure with numerous cells extending along the axial direction of the honeycomb core. Because the aramid paper honeycomb core blank will be subjected to cutting forces during subsequent milling, it is prone to displacement, vibration, or localized collapse if not securely fixed. Therefore, the honeycomb core blank needs to be fixed in a working position beforehand. This working position can be a machine tool table, a special fixture, a vacuum adsorption platform, or other devices that can reliably support and position the honeycomb core blank.

[0026] During fixation, an appropriate clamping or adsorption method can be selected based on the shape and size of the honeycomb core blank to maintain its positional stability during milling and plunge milling. This step provides a stable machining foundation for subsequent milling and edge deburring. For example, the honeycomb core blank can be bonded to the worktable with double-sided adhesive, and static pressure from a heavy object can further secure the honeycomb core blank to the worktable.

[0027] S200: Use an end mill to mill the honeycomb core blank to obtain the honeycomb core structure substrate with a preset structure.

[0028] After the honeycomb core blank is fixed, it is milled using an end mill. The end mill is suitable for cutting and shaping the shape, contour, steps, or other pre-defined structures of the honeycomb core blank. During milling, the end mill removes excess material according to the pre-defined machining path, gradually forming the honeycomb core structure substrate 100 that meets the size and shape requirements. Due to the thin walls, lightweight, and anisotropic characteristics of aramid paper honeycomb core material, burrs 400 easily appear on the edges of the honeycomb core structure substrate 100 after milling. These burrs 400 typically manifest as fiber breakage, folding, loose, or incompletely cut aramid paper residue at the edges of the honeycomb cell walls. Although the resulting honeycomb core structure substrate 100 already has the basic shape of the pre-defined structure, its outer honeycomb core edges have not yet met the final quality requirements.

[0029] S300: Using a plunger, the cutting edge of the plunger is aligned with the edge of the honeycomb core on one side of the honeycomb core structure substrate. Plunging is performed along the honeycomb core axis to remove the burrs on the edge of the honeycomb core. The plunger is moved along the arrangement direction of the honeycomb core to completely remove the burrs on the outside of the honeycomb core structure substrate to obtain the honeycomb core structure. The plunger tip is located at one end of the honeycomb core axis so that the cutting edge corresponds to the burrs.

[0030] After obtaining the honeycomb core structure substrate 100, the plunge cutter 200 is moved to the machining position. The cutter head 210 of the plunge cutter 200 is located at one end along the axial direction of the honeycomb core, so that the cutting edge 211 on the cutter head 210 corresponds to the burr 400 at the edge of the honeycomb core. During machining, the cutting edge 211 of the plunge cutter head 210 is aligned with the edge of the honeycomb core on one side of the honeycomb core structure substrate 100, and plunge milling is performed along the axial direction of the honeycomb core. For example, the plunge milling direction is as follows: Figure 2 The arrow at point A points in the diagram. This means that the insert milling cutter 200 enters and cuts along the axial direction of the honeycomb core cells. Since the burr 400 forms at the edge of the honeycomb core and is connected to the cell wall, insert milling along the axial direction allows the cutting edge 211 to directly act on the burr 400, removing it from the edge of the honeycomb core. This method avoids the inefficiency and inconsistency caused by relying solely on manual trimming, while also reducing damage to the cell wall.

[0031] After the plunge cutter 200 completes the axial plunge milling of a specific honeycomb core (for example, the first one at the edge of the honeycomb core structure substrate 100), the plunge cutter 200 is moved along the honeycomb core arrangement direction. The honeycomb core arrangement direction refers to the direction in which the honeycomb cells are repeatedly arranged within the honeycomb core plane; for example, along... Figure 2 The cutter moves in the direction indicated by the arrow at point B. When the end mill 200 moves in this direction, it can continuously mill the outer edge of the honeycomb core structure substrate 100, causing the cutting edge 211 to act sequentially on the burrs 400 at different positions. Taking the first and second honeycomb cores arranged side-by-side as an example, both the first and second honeycomb cores are arranged vertically, meaning the axial direction is vertical. After the end mill 200 finishes milling the burrs 400 of the first honeycomb core from top to bottom in the vertical direction, it retracts to the top of the first honeycomb core, then moves to the second honeycomb core, aligning the cutting edge 211 of the end mill 200 tip 210 with the burrs 400 on the edge of the second honeycomb core, and again mills the burrs 400 of the second honeycomb core from top to bottom in the vertical direction, thus completing the removal of the burrs 400 from both the first and second honeycomb cores.

[0032] By combining milling and movement along the honeycomb core arrangement direction, the burrs 400 on the outer side of the honeycomb core structure substrate 100 can be gradually and continuously removed, ultimately resulting in a honeycomb core structure with neat edges. Thus, the edges of the honeycomb core structure no longer exhibit obvious burrs 400, eliminating or significantly reducing subsequent manual trimming work.

[0033] As can be seen from the above process, this application addresses the technical problems of burrs 400 appearing on the edges of aramid paper honeycomb core structures after milling, requiring manual trimming, and reducing production efficiency. It proposes a forming method that first uses an end mill to mill the honeycomb core structure substrate 100, and then uses a plunge mill 200 to plunge mill along the honeycomb core axis and move along the honeycomb core arrangement direction to remove the burrs 400. The key is that the burr removal operation is integrated into the forming process of the honeycomb core structure, and a plunge milling method is used to align the cutting edge 211 of the plunge mill 200 cutter head 210 with the burr 400 on the edge of the honeycomb core, removing the burr 400 along the honeycomb core axis. In this way, the removal of the burrs 400 no longer relies on manual trimming, but is automatically completed by the plunge mill 200, thus improving the production efficiency of aramid paper honeycomb core structures, improving edge processing quality, and helping to ensure the consistency and stability of batch processing.

[0034] Optionally, such as Figure 4 As shown, the cutting edge 211 is an annular shape with its ends connected, and a chip cavity 212 is formed inside the annular shape; the cutting edge 211 of the end mill 200 is aligned with the edge of the honeycomb core on one side of the honeycomb core structure substrate 100, and end milling is performed along the honeycomb core axis to remove the burrs 400 of the honeycomb core edge. The method also includes: S400: The cutting edge 211 removes some of the debris generated by the burr 400 and places it in the chip cavity 212.

[0035] Specifically, when the annular cutting edge 211 of the plunger 200 tip 210 is aligned with the edge of the honeycomb core on one side of the honeycomb core structure substrate 100 and plunges along the honeycomb core axis, the cutting edge 211 directly contacts the burr 400 at the edge of the honeycomb core and cuts the burr 400 from the edge of the honeycomb core cell wall. During the removal of the burr 400, debris is generated, including cut strips of aramid paper, small paper scraps, or partially broken honeycomb wall material. Because the cutting edge 211 is annular with its ends connected, and a chip-receiving cavity 212 is formed inside the annular shape, at least some of the debris generated during the cutting process (such as strips of aramid paper) will not immediately fall outside the machining area, but will enter and be temporarily contained within the chip-receiving cavity 212. The chip-receiving cavity 212 is located inside the annular cutting edge 211, which can collect and constrain some of the debris, reducing the chance of debris scattering randomly, adhering to the honeycomb core surface, or falling into the honeycomb cell. As the plunger 200 moves along the honeycomb core's arrangement direction, the chip chamber 212 continuously collects some of the chips generated by the cutting edge 211 removing the burrs 400, thus keeping the machining area relatively clean during continuous deburring 400. By setting the chip chamber 212, the interference of chips on the cutting effect of the subsequent cutting edge 211 and the edge quality of the honeycomb core can be reduced, which is conducive to the stable operation of the plunge milling deburring 400 process, further reduces the workload of subsequent cleaning processes, and improves the forming efficiency of honeycomb core structural parts.

[0036] Optionally, such as Figure 3 and Figure 5 As shown, before using a plunge milling cutter 200 with its cutting edge 211 aligned with the edge of the honeycomb core on one side of the honeycomb core structure substrate 100 to plunge mill along the honeycomb core axis to remove the burrs 400 at the edge of the honeycomb core, the method further includes: S500: Use a disc milling cutter to cut the burrs radially along the honeycomb core to cut the burrs into multiple segments.

[0037] Specifically, after the honeycomb core blank is milled with an end mill, the burrs 400 formed on the outer edge of the honeycomb core are often not completely independent single fibers or individual small pieces, but rather interconnected or attached in sheets at the edge of the honeycomb cell walls. If a plunge mill 200 is used directly for plunge milling along the axial direction of the honeycomb core, the cutting edge 211 needs to remove a relatively long or large burr 400 in one go, resulting in relatively high cutting resistance. Furthermore, the burrs 400 are prone to being pulled, folded, or locally torn during the cutting process, thus affecting the machining quality of the honeycomb core edge. Therefore, before plunge milling to remove the burrs 400, a disc mill 300 is used to cut the burrs 400 radially along the honeycomb core.

[0038] The end mill 300 has a thin, blade-shaped cutter body, suitable for cutting burrs 400 along a predetermined path. By making the end mill 300 cut into the burrs 400 radially along the honeycomb core, it can cut off the originally continuous or long burrs 400, dividing them into multiple segments 410. Radial cutting along the honeycomb core means that the end mill 300 cuts from the outside of the honeycomb core edge towards the honeycomb core, and then along the arrangement direction of the honeycomb core (e.g., ...). Figure 5 (Moving in the direction indicated by the arrow at point C) the burrs 400 of the honeycomb core structure substrate 100 are all cut into sub-burrs 410. Through this cutting action, the longer burrs 400 are cut into multiple shorter, independent sub-burrs 410. The cutting area corresponding to each sub-burr 410 is small, so when the subsequent milling cutter 200 mills along the honeycomb core axis, the cutting edge 211 only needs to remove these sub-burrs 410 individually.

[0039] Since the burrs 400 have been pre-segmented, the cutting resistance during the plunge milling process is reduced, and the burrs 400 are less likely to be pulled as a whole. The edges of the honeycomb core cell walls are also less likely to tear or deform due to the stress on the continuous burrs 400. At the same time, the segmented sub-burrs 410 are easier to be accurately aligned and removed by the cutting edge 211 of the plunge milling cutter 200, which helps to improve the efficiency of deburring 400 and the neatness of the edges.

[0040] Optionally, such as Figure 3As shown, the cutting edge 211 of the end mill 200 is aligned with the edge of the honeycomb core on one side of the honeycomb core structure substrate 100, and end milling is performed along the honeycomb core axis to remove the burrs 400 at the edge of the honeycomb core. After moving the end mill 200 along the arrangement direction of the honeycomb core to completely remove the burrs 400 on the outside of the honeycomb core structure substrate 100 to obtain the honeycomb core structure, the method further includes: S600: Uses high-pressure gas to blow away burrs that have fallen off during milling.

[0041] Specifically, after the plunge milling cutter 200 plunges along the axial direction of the honeycomb core and moves along the honeycomb core arrangement direction, the burrs 400 on the outer side of the honeycomb core structure substrate 100 have been removed, resulting in a honeycomb core structure. However, during the plunge milling process to remove the burrs 400, some of the debris generated when the cutting edge 211 removes the burrs 400 can be contained in the chip cavity 212, but some of the removed burrs 400 and debris remain and fall onto the surface of the honeycomb core structure, inside the honeycomb cells, or on the working position. If not removed, these fallen burrs 400 and debris may adhere to the honeycomb core structure, affecting subsequent processes.

[0042] Therefore, after obtaining the honeycomb core structure, high-pressure gas is used to blow away the burrs 400 that fell off during milling. High-pressure gas can be directed through nozzles or air pipes to the surface, edges, and cell areas of the honeycomb core structure, causing the burrs 400 and remaining debris to detach and be blown away. Because the honeycomb core structure is a thin-walled, porous structure, high-pressure gas blowing can complete the cleaning without contacting the cell walls. This step removes the burrs 400 and debris remaining after milling from the honeycomb core structure and the working area, keeping the edges of the honeycomb core structure clean, further reducing subsequent manual cleaning work, and improving the molding quality and production efficiency of the honeycomb core structure.

[0043] Another aspect of the embodiments of this application, such as Figure 4 As shown, a milling apparatus is provided for use in the above-mentioned honeycomb core structure forming method. The milling apparatus includes a milling cutter 200, which includes a fixedly connected shank 220 and a cutter head 210. The end of the cutter head 210 away from the shank 220 has a cutting edge 211.

[0044] Specifically, the plunge cutter 200 is used to remove burrs 400 from the outer edge of the honeycomb core structure after the honeycomb core structure substrate 100 has been formed. The plunge cutter 200 includes a fixedly connected shank 220 and a cutter head 210. The shank 220 is used to connect to the spindle of the milling device to drive the entire plunge cutter 200 to perform plunge milling and feed movements. The end of the cutter head 210 away from the shank 220 has a cutting edge 211, which is located at the axial end of the cutter head 210 and is used to directly contact and remove the burrs 400 from the edge of the honeycomb core during the plunge milling process.

[0045] When the plunge cutter 200 plunges along the honeycomb core axial direction, the cutting edge 211 at the front end of the cutter head 210 first contacts the burr 400 at the edge of the honeycomb core, thereby removing the burr 400 along the honeycomb core axial direction. Since the cutting edge 211 is located at the end of the cutter head 210 away from the tool holder 220, the cutting edge 211 can correspond to the edge of the honeycomb core on one side of the honeycomb core structure substrate 100, and continuously remove the burr 400 on the outer side of the honeycomb core structure substrate 100 as the plunge cutter 200 moves along the honeycomb core arrangement direction. With this plunge cutter 200, the burr 400 generated after vertical milling can be removed by machining during the honeycomb core structure forming process, reducing manual trimming operations and improving the production efficiency of aramid paper honeycomb core structures.

[0046] In some embodiments, the cutting edge 211 is arc-shaped. The cutting edge 211 extends axially around the cutter head 210, thereby contacting the burrs 400 at the edge of the honeycomb core with an arc profile during the plunge milling process. In this way, the cutting edge 211 can gradually cut into the burrs 400 during axial feed, reducing instantaneous cutting resistance and allowing the burrs 400 to be cut off smoothly. The arc-shaped cutting edge 211 also helps to disperse the cutting force along the arc direction, reduce local stress concentration, and reduce tearing, crushing, or deformation of the honeycomb core cell walls due to sudden changes in cutting force.

[0047] In some implementations, such as Figure 4 As shown, the cutting edge 211 is an annular shape with its ends connected, forming a chip-receiving cavity 212 within the annular shape. The annular cutting edge 211 extends continuously along the end of the cutter head 210 away from the tool holder 220 and connects end to end, forming an annular cutting profile at the front end of the cutter head 210. The space inside the annular shape constitutes the chip-receiving cavity 212, which is used to accommodate some of the debris generated during the cutting edge 211's removal of the burr 400. When the plunger 200 plunges along the axial direction of the honeycomb core, the annular cutting edge 211 directly acts on the burr 400 at the edge of the honeycomb core, removing some of the debris generated by the burr 400 and allowing it to enter the chip-receiving cavity 212, thereby reducing debris scattering and adhesion, and keeping the machining area relatively clean.

[0048] In some implementations, such as Figure 4As shown, the milling cutter 200 also includes a plurality of chip removal holes 230. The plurality of chip removal holes 230 are located at the end of the cutter head 210 away from the cutting edge 211 and are all connected to the chip cavity 212. The plurality of chip removal holes 230 are evenly arranged along the periphery of the cutter head 210.

[0049] Specifically, the end of the cutter head 210 away from the tool holder 220 has a cutting edge 211, and multiple chip removal holes 230 are provided at the end of the cutter head 210 away from the cutting edge 211, and each chip removal hole 230 communicates with the chip cavity 212. That is to say, chips in the chip cavity 212 can be discharged through these chip removal holes 230. Since the chip removal holes 230 are located at the end of the cutter head 210 away from the cutting edge 211, the chips generated by the cutting edge 211 removing the burr 400 during the plunge milling process enter the chip cavity 212, and under the pushing action of subsequent chips, move along the chip cavity 212 towards the tool holder 220, and are finally discharged through the chip removal holes 230. In this way, the chip cavity 212 is not easily blocked by continuous accumulation of chips, and the cutting edge 211 can maintain a stable cutting state.

[0050] In some implementations, such as Figure 4 As shown, the cutting edge 211 has an outer side wall 211a and an inner side wall 211b, with the angle between the outer side wall 211a and the inner side wall 211b being between 10° and 20°. Specifically, the outer side wall 211a and the inner side wall 211b respectively constitute the two sides of the cutting edge 211 in the thickness direction. The angle between the outer side wall 211a and the inner side wall 211b is the cutting edge angle of the cutting edge 211. Within this angle range, the cutting edge 211 can form a relatively sharp cutting edge. For example, the angle can be 10°, 15°, or 20°, without any specific limitation.

[0051] Optionally, the milling device also includes a base, an end mill, a wrench 300, a tool changer assembly, and a purging assembly. The end mill 200, the end mill, and the wrench 300 are fixedly connected to the tool changer assembly, which is connected to the base and drives the tool changer assembly to move, thereby switching between the end mill 200, the end mill, or the wrench 300. The purging assembly is connected to the base.

[0052] Specifically, the base provides a mounting foundation for the various components of the milling device, allowing the end mill, face mill 300, plunge mill 200, tool changer assembly, and blow-off assembly to be integrated onto the same device. The end mill is used to mill the honeycomb core blank fixed in the working position to obtain a honeycomb core structural component base 100 with a predetermined structure. The face mill 300 is used to radially cut the burrs 400 of the honeycomb core before the plunge mill 200 removes them, cutting the burrs 400 into multiple burr segments 410. After the honeycomb core structural component base 100 is formed, the plunge mill 200, with its cutting edge 211 at the end of its tip 210 away from the shank 220, aligns with the edge of the honeycomb core, plunges along the honeycomb core axial direction, and moves along the honeycomb core arrangement direction to completely remove the burrs 400 on the outer side of the honeycomb core structural component base 100, obtaining the honeycomb core structural component. Therefore, the end mill, the planer cutter 300, and the plunger 200 respectively undertake the functions of milling and shaping the honeycomb core blank, pre-cutting and segmenting the burrs 400, and deburring the burrs 400.

[0053] The plunger 200, end mill, and wafer cutter 300 are fixedly connected to the tool changer assembly, which is connected to the base. The tool changer assembly is used to mount the plunger 200, end mill, and wafer cutter 300, and to switch one of them to the machining position when needed. Driving the tool changer assembly allows switching between machining positions for the plunger 200, end mill, or wafer cutter 300. For example, when milling a honeycomb core blank into a honeycomb core structure base 100, the tool changer assembly switches the end mill to the machining position; when cutting burrs 400 into multiple burr segments 410, the tool changer assembly switches the wafer cutter 300 to the machining position; when axial milling along the honeycomb core is needed to remove burrs 400, the tool changer assembly switches the plunger 200 to the machining position. The movement of the tool changing assembly enables the switching between different tools without disassembling and reinstalling the tools. This allows milling, 400-degree deburring, and 400-degree deburring to be performed continuously on the same milling device, reducing the time spent transferring and reclamping workpieces between different devices and improving the processing efficiency of aramid paper honeycomb core structures.

[0054] The blowing assembly is connected to the base and is used to remove the burrs 400 that fell off the honeycomb core structure substrate 100 after the end mill 200 removes the burrs 400. The blowing assembly can be mounted on the base and positioned towards the workstation or the honeycomb core structure to blow away the burrs 400 and debris from the surface, edges, and honeycomb grid areas of the honeycomb core structure after deburring. By connecting the blowing assembly to the base, the blowing function can be integrated into the milling machine, allowing for direct cleaning after machining without transferring the honeycomb core structure to a separate cleaning station, further reducing subsequent manual cleaning operations.

[0055] Therefore, the milling device of this application can sequentially complete the milling and forming of the honeycomb core blank, radial cutting and segmentation of the 400mm burr, deburring of the 400mm burr, and high-pressure gas purging and cleaning. When applied to the honeycomb core structure forming method, this device can reduce manual trimming and cleaning steps, making the forming process of aramid paper honeycomb core structure more continuous, automatic, and efficient, thereby solving the problems of existing aramid paper honeycomb core structure components having 400mm burrs on the edge after milling, requiring manual trimming, and reducing production efficiency.

[0056] The above description is merely a preferred embodiment of this application and is not intended to limit this application. Various modifications and variations can be made to this application by those skilled in the art. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this application should be included within the protection scope of this application.

Claims

1. A method for molding a honeycomb core structure, characterized in that, include: The honeycomb core blank is fixedly set in the working position; The honeycomb core blank is milled with an end mill to obtain a honeycomb core structure substrate with a preset structure. Using a plunger cutter, the cutting edge of the plunger is aligned with the edge of the honeycomb core on one side of the honeycomb core structure substrate. Plunging is performed along the honeycomb core axis to remove burrs from the edge of the honeycomb core. The plunger is then moved along the arrangement direction of the honeycomb core to completely remove the burrs from the outer side of the honeycomb core structure substrate to obtain the honeycomb core structure. The plunger cutter head is located at one end of the honeycomb core axis so that the cutting edge corresponds to the burrs.

2. The method for forming a honeycomb core structure as described in claim 1, characterized in that, The cutting edge is in the shape of a ring with its ends connected, and a chip cavity is formed inside the ring. The method of using a plunge milling cutter to align the cutting edge of the honeycomb core on one side of the honeycomb core structure substrate and plunge mill along the honeycomb core axis to remove burrs from the edge of the honeycomb core, further comprising: The cutting edge removes some of the debris generated during the removal of the burrs, which is then contained in the chip cavity.

3. The method for forming a honeycomb core structure as described in claim 1, characterized in that, Before using a plunge milling cutter to mill along the honeycomb core axial direction at the edge of the honeycomb core on one side of the honeycomb core structure substrate to remove burrs from the edge of the honeycomb core, the method further includes: The burrs are cut radially along the honeycomb core using a chip milling cutter to cut the burrs into multiple segments.

4. The method for forming a honeycomb core structure as described in claim 1, characterized in that, After the method involves aligning the cutting edge of a plunger with the edge of a honeycomb core on one side of the honeycomb core structure substrate and plunge-milling along the honeycomb core axial direction to remove burrs from the edge of the honeycomb core, and then moving the plunger along the arrangement direction of the honeycomb core to completely remove the burrs from the outer side of the honeycomb core structure substrate to obtain the honeycomb core structure, the method further includes: High-pressure gas is used to blow away the burrs that fall off during milling.

5. A milling apparatus, characterized in that, The milling device, applied to the honeycomb core structure forming method according to any one of claims 1 to 4, includes a milling cutter, the milling cutter including a fixedly connected shank and a cutter head, and the end of the cutter head away from the shank having a cutting edge.

6. The milling apparatus as described in claim 5, characterized in that, The cutting edge is arc-shaped.

7. The milling apparatus as described in claim 5, characterized in that, The cutting edge is in the shape of a ring with its ends connected, and a chip cavity is formed inside the ring.

8. The milling apparatus as described in claim 7, characterized in that, The milling cutter also includes a plurality of chip removal holes, which are located at the end of the cutter head away from the cutting edge and are all connected to the chip cavity. The plurality of chip removal holes are evenly arranged along the periphery of the cutter head.

9. The milling apparatus according to any one of claims 5 to 8, characterized in that, The cutting edge has an outer side wall and an inner side wall, and the angle between the outer side wall and the inner side wall is 10° to 20°.

10. The milling apparatus according to any one of claims 5 to 8, characterized in that, The milling device further includes a base, an end mill, a wafer cutter, a tool changing assembly, and a purging assembly. The end mill, the end mill, and the wafer cutter are fixedly connected to the tool changing assembly. The tool changing assembly is connected to the base and drives the tool changing assembly to move, thereby switching between the end mill, the end mill, or the wafer cutter. The purging assembly is connected to the base.

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