A support device for CFRP rotary body side hole making

Abstract

The utility model provides a kind of support device for CFRP rotary body side face hole making, belong to the machining technical field of carbon fiber reinforced composite material (CFRP).It solves the delamination, wire drawing, splitting defects and other problems that appear in the process of punching CFRP parts, especially CFRP rotary body pipe parts side face in prior art.This kind of support device for CFRP rotary body side face hole making, it includes: base, as the processing platform of workpiece to be processed;Support frame, located inside workpiece to be processed, and connected to base, and the end of the side wall of workpiece to be processed on support frame is connected end;Power source, installed on the connected end of support frame;Support plate, one side is connected with the output end of power source, the other side of support plate is provided with elastic part, and support plate is driven by power source to approach and adhere to the side wall of workpiece to be processed.The utility model has the advantages of preventing delamination, splitting defects in the process of side face hole making of CFRP rotary body, effectively removing burr.

Description

Technical Field

[0001] This utility model belongs to the field of machining technology of carbon fiber reinforced composite materials (CFRP), specifically relating to a support device for drilling holes on the side of a CFRP rotating body. Background Technology

[0002] In modern manufacturing, carbon fiber reinforced polymer (CFRP) composites have been widely used in aerospace, automotive, military, and other cutting-edge fields due to their numerous superior properties, including light weight, high specific modulus, high specific strength, low coefficient of thermal expansion, high corrosion resistance, fatigue resistance, and strong designability. For example, in the aerospace field, CFRP structural components often need to be riveted or bolted to other parts, making drilling essential.

[0003] However, CFRP is an anisotropic laminate material. Its heterogeneity, anisotropy, and low interlayer properties make it highly susceptible to various defects during drilling. Among these, splitting, delamination, and burrs at the drill exit are particularly prominent. Delamination defects can significantly shorten the service life of structural components, and in severe cases, even render them unusable, becoming one of the key factors restricting the widespread application of CFRP. At the drill exit, due to the limited interlayer bonding strength of CFRP, excessive drilling axial force can exceed the interlayer bonding force, leading to delamination. Simultaneously, tool wear during drilling can dull the cutting edge, making it difficult to effectively cut the fiber bundles, thus forming burrs at the drill exit. Furthermore, the material may split under the pressure of the drill bit, severely affecting the drilling quality.

[0004] To address the drilling defects in CFRP (Crystal Reinforced Plastic) surfaces, most existing technologies are effective for drilling flat CFRP plates. However, they have not yet completely and effectively solved the problems of splitting and delamination, as well as burrs at the drill exit, in CFRP drilling on curved or arc surfaces. Utility Model Content

[0005] The purpose of this invention is to provide a support device for drilling holes on the side of CFRP rotating bodies, so as to solve the problems of delamination, burrs, and splitting defects that occur in the process of drilling holes on the side of CFRP parts, especially CFRP rotating tubular parts, in the prior art.

[0006] This utility model can be achieved through the following technical solutions:

[0007] A support device for drilling holes in the side wall of a CFRP rotating body, suitable for drilling holes in the side wall of a hollow workpiece, comprising:

[0008] The base serves as a processing platform for the workpiece to be processed;

[0009] The support frame is located inside the workpiece to be processed and is connected to the base, with the end of the support frame facing the side wall of the workpiece to be processed being the connection end;

[0010] The power source is installed at the connecting end of the support frame, and the output end of the power source can be close to or far from the side wall of the workpiece to be processed.

[0011] The support plate is connected to the output end of the power source on one side and has an elastic part on the other side. The power source drives the support plate to approach and fit against the side wall of the workpiece to be processed. The deformation of the elastic part causes the contact area between the support plate and the side wall of the workpiece to be processed to be greater than the hole area in the current area of ​​the side wall of the workpiece to be processed.

[0012] The aforementioned support device for drilling holes on the side of a CFRP rotating body has two connecting ends on the same side of the support frame, and the two connecting ends are arranged vertically along the axis of the workpiece to be processed. Each connecting end is equipped with a power source, and the tilt angle of the surface of the elastic part that is in contact with the side wall of the workpiece to be processed can be changed by adjusting the output stroke of the output ends of the two power sources.

[0013] The aforementioned support device for drilling holes on the side of a CFRP rotating body has a power source output end on the connection end furthest from the base connected to the upper part of the support plate, and a power source output end on the connection end closest to the base connected to the middle part of the support plate.

[0014] The aforementioned support device for drilling holes on the side of a CFRP rotating body includes a support frame comprising a column and two support arms connected to both ends of the column, with the connecting end located at the end of the support arm. The two power sources connected to both ends of the support arm are symmetrically arranged along the column.

[0015] The aforementioned support device for drilling holes on the side of a CFRP rotating body has two support plates, which are located at both ends of a support arm. Each support plate includes a support frame connected to the output end of a power source and an elastic part connected to the support frame.

[0016] The aforementioned support device for drilling holes on the side of a CFRP rotating body has an elastic part that is arranged in an arc shape.

[0017] The aforementioned support device for drilling holes on the side of a CFRP rotating body includes the following power source:

[0018] The cylinder body is connected to the connecting arm, and a slide rail is provided on the cylinder body;

[0019] The piston rod is movably connected to the cylinder block at one end;

[0020] The movable block is connected at one end to the other end of the piston rod, and the other end of the movable block slides and engages with the cylinder body via a slide rail.

[0021] The aforementioned support device for drilling holes on the side of a CFRP rotating body has a support frame movably connected to a base via bearings, and a drive structure causes the support frame to rotate circumferentially within the workpiece to be processed.

[0022] The aforementioned support device for drilling holes on the side of a CFRP rotating body includes a drive structure comprising:

[0023] The base gear is fixedly connected to the base and is coaxially arranged with the bearing;

[0024] The motor is fixedly connected to the support frame. The output end of the motor is equipped with a motor gear, which meshes with the base gear.

[0025] The aforementioned support device for drilling holes on the side of a CFRP rotating body also includes a chassis at the bottom of the support frame. The chassis is fixedly connected to the column and the motor, and the chassis is movably connected to the base via bearings.

[0026] Compared with the prior art, the beneficial effects of this utility model are as follows:

[0027] 1. The support device for drilling holes on the side of CFRP rotary bodies can provide stable support force through the cooperation of cylinder and support plate, and interact with the drill bit to prevent delamination and splitting defects of CFRP rotary bodies during side drilling. By the support plate being in contact with the workpiece to be processed, burrs are cut off due to lack of movement space, which can effectively remove burrs.

[0028] 2. When the workpiece to be processed is a rotating body, the symmetrically arranged support plates can achieve uniform support for the rotating body, further improving the stability of the support and the processing accuracy.

[0029] 3. The support frame is rotatably connected to the base via bearings and, in conjunction with a rotating mechanism, allows for flexible adjustment of the support angle to adapt to the processing requirements of different hole positions, thereby improving processing flexibility and efficiency.

[0030] 4. The side of the support plate that abuts against the workpiece is the elastic part, and the other side is the support frame. The elastic part is controlled by a cylinder and fits against the curved surface of the workpiece to provide uniform support force. At the same time, the elastic characteristics of the elastic part can effectively absorb cutting vibration and reduce the risk of delamination. The support frame can ensure the strength and stability of the support. Attached Figure Description

[0031] Figure 1 This is a schematic diagram of the structure of a support device for drilling holes on the side of a CFRP rotating body according to the present invention.

[0032] Figure 2 This is a structural schematic diagram of the support frame in this utility model.

[0033] In the diagram, 100 represents the base; 110 represents the base gear.

[0034] 200. Support plate; 210. Support frame; 220. Rubber sheet;

[0035] 300. Support frame; 310. Support arm; 320. Power source; 321. Slide rail; 322. Moving block; 323. Cylinder block; 324. Piston rod; 330. Column; 340. Chassis; 350. Bearing;

[0036] 400. Electric motor; 410. Electric motor gear;

[0037] 500. Workpiece to be processed. Detailed Implementation

[0038] The following are specific embodiments of the present invention, which are described in conjunction with the accompanying drawings. However, the present invention is not limited to these embodiments.

[0039] It should be noted that all directional indicators (such as up, down, left, right, front, back, etc.) in this utility model embodiment are only used to explain the relative positional relationship and movement of each component in a certain specific posture (as shown in the figure). If the specific posture changes, the directional indicator will also change accordingly.

[0040] like Figures 1 to 2 As shown, this utility model provides a support device for drilling holes on the side of a CFRP rotating body, suitable for drilling holes in the side wall of a hollow workpiece 500, including:

[0041] The base 100 serves as a processing platform for the workpiece 500 to be processed;

[0042] The support frame 300 is located inside the workpiece 500 to be processed and is connected to the base 100. The end of the support frame 300 facing the side wall of the workpiece 500 to be processed is the connection end.

[0043] The power source 320 is installed at the connecting end of the support frame 300, and the output end of the power source 320 can be close to or far away from the side wall of the workpiece 500 to be processed.

[0044] The support plate 200 is connected to the output end of the power source 320 on one side, and an elastic part 220 is provided on the other side of the support plate 200. The power source 320 drives the support plate 200 to approach and fit against the side wall of the workpiece 500 to be processed. The deformation of the elastic part 220 causes the contact area between the support plate 200 and the side wall of the workpiece 500 to be processed to be greater than the hole area in the current area of ​​the side wall of the workpiece 500 to be processed.

[0045] It is worth mentioning that the base 100, as a positioning structure, is firmly connected to the workpiece 500 to be processed, providing a reference positioning for the entire support device and ensuring the relative positional accuracy between the device and the workpiece 500 during subsequent processing. The workpiece 500 to be processed is generally a curved surface. One side of the support plate 200 is in contact with the workpiece 500. The side of the support plate 200 that abuts against the workpiece 500 is the elastic part 220, and the other side is the support frame 210. The elastic part 220 is a rubber plate, and the support frame 210 is sheet metal. Its elastic part 220 contacts the curved contour of the surface to be processed, and the other side is connected to the output end of the power source 320. During operation, the power source 320 is fixed by the support frame 300. After starting, the output end of the power source 320 applies a supporting force to the support plate 200. At the same time, by controlling the stroke of the output end, the support plate 200 is evenly pressed against the surface to be processed, resulting in a tight fit between the support plate 200 and the surface to be processed. The fiber bundles at the drill exit lack room to move during the cutting process and are effectively cut by the drill bit, thus preventing burr formation. Simultaneously, the supporting force is evenly distributed across the processing area, suppressing the tendency of material delamination and splitting under drill bit pressure. From the perspective of force balance and material constraint, the three core problems of delamination, burrs, and splitting during CFRP rotary drilling are solved. After drilling, the rubber plate of the 200mm support plate shows wear and needs to be disassembled and replaced promptly.

[0046] Preferably, in this invention, two connecting ends are arranged vertically along the axis of the workpiece 500 on the same side of the support frame 300, and each connecting end is equipped with a power source 320. By flexibly adjusting the stroke of the output ends of the two power sources 320, the contact force between the elastic part 220 and the side wall of the workpiece 500 can be precisely changed. When processing workpieces with different tilt angles, the stroke of the output ends of the two power sources 320 can be adjusted according to actual needs to tilt the elastic part 220 to a suitable angle, ensuring that the support plate 200 is tightly fitted with the side wall of the workpiece, providing stable support for drilling operations, and enhancing the adaptability of the support device to different processing requirements.

[0047] Preferably, in the specific structural layout, the output end of the power source 320, which is farther from the base 100, is connected to the upper part of the support plate 200, and the output end of the power source 320, which is closer to the base 100, is connected to the middle part of the support plate 200. This connection method can achieve stable driving of the support plate 200, so that the support plate 200 fits against the side wall of the workpiece with a reasonable force distribution under the action of the power source 320, effectively avoiding the offset or shaking of the support plate 200 caused by uneven force.

[0048] Preferably, the support frame 300 adopts a structure in which a column 330 is connected to two support arms 310, with the connecting end located at the end of the support arm 310, and the power sources 320 corresponding to both ends of the support arm 310 are symmetrically distributed along the column 330. This symmetrical layout gives the entire support device mechanical balance characteristics. When drilling holes on the side of the CFRP rotating body, the symmetrically arranged power sources 320 can output supporting force simultaneously and equally, ensuring that the support plate 200 will not twist or tilt due to uneven force during the process of adhering to the side wall of the workpiece, effectively ensuring the accuracy of the drilling operation.

[0049] Preferably, two support plates 200 are located at both ends of the support arm 310, and each support plate 200 consists of a support frame 210 and an elastic part 220. The support frame 210, as the rigid skeleton of the support plate 200, can withstand the supporting force transmitted by the power source 320 and evenly distribute it to the elastic part 220, ensuring the strength and stability of the support structure. The elastic part 220, with its own deformation characteristics, can closely conform to the curved sidewalls of the CFRP rotating body. During the drilling process, the elastic part 220 can adaptively adjust its conformation according to the workpiece's curved surface contour, providing uniform supporting force and effectively offsetting the drilling axial force. Furthermore, its elastic buffering effect can absorb processing vibrations, reducing the impact on the material's interlayer structure and lowering the risk of delamination. The two work together to achieve efficient and stable support for the CFRP rotating body.

[0050] Preferably, the elastic portion 220 is arc-shaped, conforming to the curved shape of the CFRP rotating body. In actual hole-making, the arc-shaped elastic portion 220 can form a larger area and a tighter fit with the sidewall of the rotating body. At the same time, the arc-shaped elastic portion 220 can adaptively adjust according to the curvature changes of different parts of the rotating body, ensuring stable and effective support throughout the entire hole-making process.

[0051] Preferably, the power source 320 includes a cylinder 323 connected to the support arm 310, with a slide rail 321 on the cylinder 323; a piston rod 324, one end of which is movably connected to the cylinder 323; and a moving block 322, one end of which is connected to the other end of the piston rod 324, the other end of which slides with the cylinder 323 via the slide rail 321. The power source 320, with its cylinder 323, piston rod 324, and moving block 322, provides a stable and controllable power output for the support device. The sliding engagement between the slide rail 321 on the cylinder 323 and the moving block 322 makes the extension and retraction of the piston rod 324 smoother. Simultaneously, a row of through holes arranged along the sliding direction is provided at corresponding positions on the moving block 322 and the slide rail 321. By placing locating pins on different through holes, the stroke of the piston rod 324 is controlled, thereby changing the stroke of the piston rod 324. Before drilling, the operator can adjust the stroke of the piston rod 324 according to the material characteristics and processing requirements of the workpiece, so that the support plate 200 fits the workpiece at a suitable pressure angle, which can ensure the support effect without damaging the workpiece due to excessive pressure.

[0052] Preferably, the support frame 300 is movably connected to the base 100 via a bearing 350, and is equipped with a drive structure consisting of a base gear 110, a motor 400, and a motor gear 410. The base gear 110 is fixedly connected to the base 100, and the motor gear 410 is fixedly connected to the output end of the motor 400. The base gear 110 and the bearing 350 are coaxially arranged. When holes need to be drilled at different parts of the rotating body, simply starting the motor 400 and engaging the motor gear 410 with the base gear 110 will drive the support frame 300 to rotate smoothly inside the workpiece, quickly adjusting to the required machining angle. This eliminates the need for frequent manual disassembly and reassembly of the workpiece, significantly improving processing efficiency.

[0053] Preferably, the support frame 300 further includes a chassis 340, which is fixedly connected to the column 330 and the motor 400, and connected to the base 100 via a bearing 350, further enhancing the structural stability of the entire support device. As the basic component of the support device, the chassis 340 can distribute the gravity from the column 330 and the motor 400, as well as various forces generated during processing, preventing the support frame 300 from tilting or swaying due to uneven force distribution. Simultaneously, the fixed connection method of the chassis 340 strengthens the connection between the column 330 and the motor 400, making the entire support device a robust whole.

[0054] It is worth mentioning that the base 100 serves as the positioning foundation to ensure the relative accuracy between the device and the workpiece. The support frame 300 forms a rigid skeleton through the column 330 and the symmetrical support arm 310. The power source 320 adjusts the stroke of the piston rod 324 through the structure of the cylinder 323 and the slide rail 321, thereby precisely controlling the contact force of the support plate 200. The curved elastic part 220 fits tightly with the curved surface of the workpiece through deformation to suppress delamination and burrs, and can also absorb vibration to reduce the risk of defects. The drive structure realizes the circumferential rotation of the support frame 300 through gear meshing. With the chassis 340 connected by the bearing 350, the device can flexibly adapt to the processing requirements of different hole positions. It solves the defects of curved surface hole making in the prior art from three aspects: force balance, curved surface contact, and dynamic adjustment, and significantly improves processing quality and efficiency.

[0055] It should be noted that in this utility model, the use of terms such as "first," "second," and "a" is for descriptive purposes only and should not be construed as indicating or implying their relative importance or implicitly specifying the number of technical features indicated. Therefore, a feature defined as "first" or "second" may explicitly or implicitly include at least one of those features. In the description of this utility model, "multiple" means at least two, such as two, three, etc., unless otherwise explicitly defined. The terms "connection," "fixed," etc., should be interpreted broadly. For example, "fixed" can mean a fixed connection, a detachable connection, or an integral part; it can mean a mechanical connection or an electrical connection; it can mean a direct connection or an indirect connection through an intermediate medium; it can mean the internal communication of two elements or the interaction between two elements, unless otherwise explicitly defined. Those skilled in the art can understand the specific meaning of the above terms in this utility model according to the specific circumstances.

[0056] Furthermore, the technical solutions of the various embodiments of this utility model can be combined with each other, but only if they are based on the ability of those skilled in the art to implement them. When the combination of technical solutions is contradictory or cannot be implemented, it should be considered that such combination of technical solutions does not exist and is not within the scope of protection claimed by this utility model.

[0057] The specific embodiments described herein are merely illustrative examples illustrating the spirit of this utility model. Those skilled in the art to which this utility model pertains may make various modifications or additions to the described specific embodiments or use similar methods to substitute them, without departing from the spirit of this utility model or exceeding the scope defined by the appended claims.

Claims

1. A support device for drilling holes in the side wall of a CFRP rotating body, suitable for drilling holes in the side wall of a hollow workpiece, characterized in that, include: The base serves as a processing platform for the workpiece to be processed; The support frame is located inside the workpiece to be processed and is connected to the base, with the end of the support frame facing the side wall of the workpiece to be processed being the connection end; The power source is installed at the connecting end of the support frame, and the output end of the power source can be close to or far from the side wall of the workpiece to be processed. The support plate is connected to the output end of the power source on one side and has an elastic part on the other side. The power source drives the support plate to approach and fit against the side wall of the workpiece to be processed. The deformation of the elastic part causes the contact area between the support plate and the side wall of the workpiece to be processed to be greater than the hole area in the current area of ​​the side wall of the workpiece to be processed.

2. The support device for drilling holes on the side of a CFRP rotating body according to claim 1, characterized in that, The support frame has two connecting ends on the same side, and the two connecting ends are arranged vertically along the axis of the workpiece to be processed. Each connecting end is equipped with a power source. The tilt angle of the surface of the elastic part that is in contact with the side wall of the workpiece to be processed can be changed by adjusting the output stroke of the output end of the two power sources.

3. A support device for drilling holes on the side of a CFRP rotating body according to claim 2, characterized in that, The power source output of the connection end furthest from the base is connected to the upper part of the support plate, while the power source output of the connection end closest to the base is connected to the middle part of the support plate.

4. A support device for drilling holes on the side of a CFRP rotating body according to claim 1, characterized in that, The support frame includes a column and two support arms connected to both ends of the column, with the connecting ends located at the ends of the support arms. The two power sources connected to both ends of the support arms are symmetrically arranged along the column.

5. A support device for drilling holes on the side of a CFRP rotating body according to claim 1, characterized in that, There are two support plates, which are located at both ends of the support arm. Each support plate includes a support frame connected to the output end of the power source and an elastic part connected to the support frame.

6. A support device for drilling holes on the side of a CFRP rotating body according to claim 1, characterized in that, The elastic part is designed with an arc surface.

7. A support device for drilling holes on the side of a CFRP rotating body according to claim 1, characterized in that, The power source includes: The cylinder body is connected to the connecting arm, and a slide rail is provided on the cylinder body; The piston rod is movably connected to the cylinder block at one end; The movable block is connected at one end to the other end of the piston rod, and the other end of the movable block slides and engages with the cylinder body via a slide rail.

8. A support device for drilling holes on the side of a CFRP rotating body according to claim 1, characterized in that, The support frame is movably connected to the base via bearings, and the drive structure causes the support frame to rotate circumferentially within the workpiece to be processed.

9. A support device for drilling holes on the side of a CFRP rotating body according to claim 8, characterized in that, The drive structure includes: The base gear is fixedly connected to the base and is coaxially arranged with the bearing; The motor is fixedly connected to the support frame. The output end of the motor is equipped with a motor gear, which meshes with the base gear.

10. A support device for drilling holes on the side of a CFRP rotating body according to claim 4 or 9, characterized in that, The support frame is also equipped with a chassis at the bottom, which is fixedly connected to the column and motor. The chassis is movably connected to the base through bearings.

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