An anti-delamination device for drilling holes on the end face of CFRP rotating bodies

Abstract

This invention provides an anti-delamination device for drilling holes on the end face of a CFRP rotary body, belonging to the field of CFRP technology. It includes: a substrate with a positioning part that engages with a positioning hole on the end face of the CFRP rotary body; a clamping structure with an open end into which the end face of the CFRP rotary body and the substrate are inserted and abutted against both sides of the open end; and a cylinder connected to the substrate, with a buffer part connected to its output end. One end of the buffer part penetrates the substrate and extends or retracts under the action of the cylinder output end. This anti-delamination device for drilling holes on the end face of a CFRP rotary body effectively absorbs and disperses the cutting force generated by the cutting tool during the drilling process by abutting against the buffer part below the hole to be processed. This significantly reduces the shear stress between the layers of the CFRP rotary body material, thereby significantly reducing the possibility of delamination and improving the drilling quality.

Description

Technical Field

[0001] This utility model belongs to the field of CFRP (carbon fiber reinforced composite material) processing technology, and relates to an anti-delamination device, particularly an anti-delamination device for drilling holes on the end face of a CFRP rotating body. Background Technology

[0002] CFRP (Chemical Fluorescent Reinforced Polymer) is widely used in aerospace, automotive manufacturing, and many other fields due to its excellent properties such as high specific strength, high specific modulus, high temperature resistance, and corrosion resistance. In practical applications, drilling holes in CFRP is a common machining operation. However, CFRP is a typical orthotropic material with low interlaminar shear strength. In traditional mechanical drilling processes, the cutting force of the drill bit easily leads to delamination between CFRP layers. Delamination not only severely affects the quality of the hole drilling, reduces the mechanical properties and service life of the CFRP component, but may also cause safety hazards during the use of the entire component.

[0003] Currently, to address the interlayer delamination problem in CFRP hole drilling, existing technologies generally employ two approaches: First, improving drill bit design. However, specially designed drill bits are expensive, and while they can reduce delamination caused by cutting forces to some extent, they cannot fundamentally eliminate the risk of interlayer delamination. Second, optimizing machining process parameters. However, this approach is often affected by factors such as equipment performance and machining efficiency, making it difficult to implement comprehensively. Utility Model Content

[0004] The purpose of this invention is to address the aforementioned problems in existing technologies by proposing an anti-peeling device that can completely eliminate peeling caused by cutting forces and improve the quality of hole-making processes.

[0005] The objective of this utility model can be achieved through the following technical solution: A device for preventing interlayer peeling during hole making on the end face of a CFRP rotating body, comprising:

[0006] An anti-delamination device for drilling holes on the end face of CFRP rotating bodies, suitable for drilling holes on the end face of CFRP rotating bodies, including:

[0007] The substrate has a positioning part provided on it, and the positioning part is inserted into the positioning hole on the end face of the CFRP rotating body.

[0008] The clamping structure has an open end, into which the end face of the CFRP rotating body and the substrate are inserted and abutted against the two sides of the open end respectively.

[0009] A cylinder is connected to a base plate, and a buffer is connected to the output end of the cylinder. One end of the buffer penetrates the base plate and extends or retracts under the action of the cylinder output end.

[0010] In the above-mentioned anti-delamination device for drilling holes on the end face of CFRP rotating bodies, there are two positioning parts and two cylinders, and the two positioning parts and the two cylinders are symmetrically distributed with the clamping part as the center.

[0011] In the above-mentioned anti-delamination device for drilling holes on the end face of CFRP rotating body, the positioning part is a positioning member, and the two ends of the positioning member along its axial direction are a first connecting end and a second connecting end, wherein the first connecting end is connected to the substrate, and the second connecting end is connected to the positioning hole on the end face of the CFRP rotating body.

[0012] In the above-mentioned anti-delamination device for drilling holes on the end face of CFRP rotating bodies, the positioning element is arranged in a stepped shape, and the diameter of the middle part of the positioning element is larger than the diameter of the first connecting end and the diameter of the second connecting end.

[0013] In the above-mentioned anti-delamination device for drilling holes on the end face of CFRP rotary bodies, the clamping structure includes a C-shaped clamping member and a locking member connected to one side wall of the opening end of the clamping member. The end face of the CFRP rotary body and the substrate are both inserted into the clamping member, and the substrate abuts against the other side wall of the opening end of the clamping member by rotating the locking member. The end face of the CFRP rotary body abuts against the locking member.

[0014] In the above-mentioned anti-delamination device for drilling holes on the end face of CFRP rotating bodies, one end of the locking member is threadedly connected to the clamping member, and the other end of the locking member is provided with a pad.

[0015] In the above-mentioned anti-delamination device for drilling holes on the end face of CFRP rotary bodies, the buffer part is a buffer member. One end of the buffer member passes through the substrate along the output direction of the cylinder and is connected to the output end of the cylinder. The other end of the buffer member is a free end. In the initial state, there is a gap between the free end of the buffer member and the end face of the CFRP rotary body.

[0016] In the above-mentioned anti-delamination device for drilling holes on the end face of CFRP rotary bodies, the buffer is arranged in a stepped shape, and the diameter of the end of the buffer connected to the cylinder output end is smaller than the diameter of the end of the buffer that abuts against the end face of the CFRP rotary body.

[0017] In the above-mentioned anti-delamination device for drilling holes on the end face of CFRP rotating bodies, the output end of the cylinder is provided with a top plate, and a buffer is screwed onto the top plate. There are two buffers, which are screwed onto the two ends of the top plate respectively.

[0018] In the aforementioned anti-delamination device for drilling holes on the end face of a CFRP rotating body, the buffer element is made of rubber.

[0019] Compared with the prior art, the beneficial effects of this utility model are as follows:

[0020] (1) The present invention provides an anti-delamination device for drilling holes on the end face of a CFRP rotary body. By abutting a buffer portion below the hole to be processed, it can effectively absorb and disperse the cutting force generated by the cutting tool during the drilling process, significantly reducing the shear stress between the layers of the CFRP rotary body material, thereby significantly reducing the possibility of delamination and improving the drilling quality. In addition, due to the significantly improved drilling quality, the risk of damage to the CFRP rotary body caused by drilling defects during use is reduced, thereby effectively extending the service life of the CFRP rotary body.

[0021] (2) By setting up a positioning part, the positional accuracy of the CFRP rotating body during the hole making process can be ensured, and the hole making deviation caused by the displacement of the CFRP rotating body can be avoided, thereby improving the hole making quality.

[0022] (3) Since the diameter of the middle part of the positioning component is larger than the diameter of both ends, the contact area between the positioning component and the substrate and the end face of the CFRP rotating body is increased when the substrate and the end face of the CFRP rotating body are clamped and fixed, thereby improving the positioning effect and preventing the CFRP rotating body from moving during hole making, thus improving the hole making quality.

[0023] (4) By setting a pad at one end of the locking part, the hard contact is changed to a flexible contact when the locking part abuts against the end face of the CFRP rotating body, so as to avoid scratches or dents on the surface of the end face of the CFRP rotating body and realize the protection of the end face of the CFRP rotating body. Attached Figure Description

[0024] Figure 1 This is a schematic diagram of the structure of a CFRP rotating body in the prior art.

[0025] Figure 2 This is a schematic diagram of the structure of an anti-delamination device for drilling holes on the end face of a CFRP rotating body according to this utility model.

[0026] Figure 3 This is a diagram showing the usage status of an anti-delamination device for drilling holes on the end face of a CFRP rotating body, according to this utility model.

[0027] In the picture,

[0028] 100. CFRP rotating body end face; 110. Positioning hole;

[0029] 200. Substrate;

[0030] 300, Positioning part; 310, First connecting end; 320, Second connecting end;

[0031] 400. Clamping structure; 410. Clamping component; 420. Locking component; 430. Pad block;

[0032] 500, cylinder; 510, top plate;

[0033] 600. Buffer section. Detailed Implementation

[0034] 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.

[0035] 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.

[0036] like Figures 1 to 3 As shown, this utility model provides an anti-delamination device for drilling holes on the end face of a CFRP rotating body, suitable for drilling holes 100mm on the end face of a CFRP rotating body, comprising:

[0037] The substrate 200 has a positioning part 300 provided on it, and the positioning part 300 is inserted into the positioning hole 110 on the end face 100 of the CFRP rotating body.

[0038] The clamping structure 400 has an open end, into which the CFRP rotating body end face 100 and the substrate 200 are inserted and abutted against the two sides of the open end respectively.

[0039] A cylinder 500 is connected to a base plate 200, and a buffer 600 is connected to the output end of the cylinder 500. One end of the buffer 600 passes through the base plate 200 and extends or retracts under the action of the output end of the cylinder 500.

[0040] It is worth mentioning that the working principle of the anti-delamination device for drilling holes on the end face of a CFRP rotating body provided by this utility model is as follows: First, the entire device is placed inside the CFRP rotating body and positioned below the end face 100 of the CFRP rotating body; then, the positioning part 300 on the substrate 200 is aligned with the positioning hole 110 on the end face 100 of the CFRP rotating body, and the two form an insertion fit to complete the positioning of the device on the end face 100 of the CFRP rotating body; then, the substrate 200 is clamped by the clamping structure 400. The connection between the buffer part 600 and the CFRP rotating body end face 100 fixes the entire device on the CFRP rotating body end face 100. At this time, the buffer part 600 does not contact the CFRP rotating body end face 100, but the buffer part 600 is aligned with the hole to be processed on the CFRP rotating body end face 100. Then, the buffer part 600 is extended by the cylinder 500 and abuts against the lower surface of the CFRP rotating body end face 100. Finally, the cutting tool is used to drill holes in the hole to be processed on the CFRP rotating body end face 100.

[0041] This invention provides an anti-delamination device for drilling holes on the end face of a CFRP rotary body. By abutting a buffer portion 600 below the hole to be machined, it effectively absorbs and disperses the cutting force generated by the cutting tool during the drilling process, significantly reducing the shear stress between the layers of the CFRP rotary body material. This significantly reduces the possibility of delamination and improves the drilling quality. Furthermore, the significantly improved drilling quality reduces the risk of damage to the CFRP rotary body due to drilling defects during use, thereby effectively extending the service life of the CFRP rotary body.

[0042] It is worth mentioning that by setting the positioning part 300, the positional accuracy of the CFRP rotating body during the hole-making process can be ensured, and hole-making deviation caused by the displacement of the CFRP rotating body can be avoided, thereby improving the hole-making quality.

[0043] Preferably, there are two positioning parts 300 and two cylinders 500, and the two positioning parts 300 and the two cylinders 500 are symmetrically distributed with the clamping part as the center.

[0044] Preferably, the positioning part 300 is a positioning member, and the two ends of the positioning member along its axial direction are a first connecting end 310 and a second connecting end 320, wherein the first connecting end 310 is connected to the substrate 200, and the second connecting end 320 is connected to the positioning hole 110 on the end face 100 of the CFRP rotating body.

[0045] It is worth mentioning that different combinations can be formed depending on whether the outer surfaces of the first connecting end 310 and the second connecting end 320 are provided with threads, namely: both the outer surfaces of the first connecting end 310 and the second connecting end 320 are provided with external threads; the outer surface of the first connecting end 310 is provided with external threads and the outer surface of the second connecting end 320 is not provided with external threads; the outer surface of the first connecting end 310 is not provided with external threads and the outer surface of the second connecting end 320 is provided with external threads; and neither the outer surfaces of the first connecting end 310 nor the second connecting end 320 are provided with external threads.

[0046] Specifically, when both the outer surfaces of the first connecting end 310 and the second connecting end 320 are provided with external threads, the first connecting end 310 is threadedly connected to the substrate 200, and the second connecting end 320 is plugged into the positioning hole 110 on the CFRP rotating body end face 100. In this case, the connection between the second connecting end 320 and the CFRP rotating body end face 100 can be locked by a nut. Under this structure, the clamping structure 400 can be omitted. If the nut is not used for locking, the second connecting end 320 and the positioning hole 110 are only plugged into each other. In this case, the clamping structure 400 is still required to lock the connection between the substrate 200 and the CFRP rotating body end face 100.

[0047] When the outer surface of the first connecting end 310 is provided with external threads and the outer surface of the second connecting end 320 is not provided with external threads, the first connecting end 310 and the substrate 200 are connected by threads, and the second connecting end 320 and the positioning hole 110 on the CFRP rotating body end face 100 are connected by insertion. At this time, although the entire device can be positioned with the CFRP rotating body end face 100, it cannot be fixed relatively. Therefore, the clamping structure 400 is needed to fix the two together.

[0048] When the outer surface of the first connecting end 310 has no external thread and the outer surface of the second connecting end 320 has an external thread, the first connecting end 310 and the substrate 200 are in a plug-in fit, and the second connecting end 320 and the positioning hole 110 on the CFRP rotating body end face 100 are also in a plug-in fit. Although the second connecting end 320 and the CFRP rotating body end face 100 can be connected by a nut, since the first connecting end 310 and the substrate 200 are in a plug-in fit and are not locked, the clamping structure 400 is still required to fix the substrate 200 and the CFRP rotating body end face 100.

[0049] When neither the outer surface of the first connecting end 310 nor the second connecting end 320 has external threads, the first connecting end 310 is plugged into the substrate 200, and the second connecting end 320 is plugged into the positioning hole 110 on the end face 100 of the CFRP rotating body. At this time, the clamping structure 400 is required to fix the substrate 200 and the end face 100 of the CFRP rotating body.

[0050] Based on the above description, the preferred method is to provide external threads on the outer surface of the first connecting end 310, and whether or not external threads are provided on the outer surface of the second connecting end 320 has no effect. If external threads are provided, the clamping structure 400 can be omitted; if external threads are not provided, the clamping structure 400 can be used to fix the substrate 200 and the CFRP rotating body end face 100.

[0051] More preferably, the positioning element is arranged in a stepped shape, and the diameter of the middle part of the positioning element is greater than the diameter of the first connecting end 310 and the diameter of the second connecting end 320.

[0052] In this embodiment, since the diameter of the middle part of the positioning member is larger than the diameter of both ends, the contact area between the positioning member and the substrate 200 and the CFRP rotating body end face 100 is increased when the substrate 200 and the CFRP rotating body end face 100 are clamped and fixed, thereby improving the positioning effect and preventing the CFRP rotating body from moving during hole making, thereby improving the hole making quality.

[0053] It is worth mentioning that the positioning component is made of metal. Since the positioning component is detachably connected to the substrate 200, it can be adapted to different positioning holes 110 by replacing the positioning component.

[0054] Preferably, the clamping structure 400 includes a C-shaped clamping member 410 and a locking member 420 connected to one side wall of the opening end of the clamping member 410. The CFRP rotating body end face 100 and the substrate 200 are both inserted into the clamping member 410, and the substrate 200 abuts against the other side wall of the opening end of the clamping member 410 by rotating the locking member 420. The CFRP rotating body end face 100 abuts against the locking member 420.

[0055] It is worth mentioning that one end of the locking member 420 is threadedly connected to the clamping member 410, and the other end of the locking member 420 is provided with a pad 430.

[0056] In this embodiment, by providing a pad 430 at one end of the locking member 420, the rigid contact is changed to a flexible contact when the locking member 420 abuts against the CFRP rotating body end face 100, so as to avoid scratches or dents on the surface of the CFRP rotating body end face 100 and achieve protection of the CFRP rotating body end face 100.

[0057] Preferably, the buffer part 600 is a buffer member. One end of the buffer member passes through the substrate 200 along the output direction of the cylinder 500 and is connected to the output end of the cylinder 500. The other end of the buffer member is a free end. In the initial state, there is a gap between the free end of the buffer member and the end face 100 of the CFRP rotating body.

[0058] More preferably, the buffer is arranged in a stepped shape, and the diameter of the end of the buffer connected to the output end of the cylinder 500 is smaller than the diameter of the end of the buffer that abuts against the end face 100 of the CFRP rotating body.

[0059] It is worth mentioning that the cushioning component is made of a flexible material, such as rubber.

[0060] In addition, the buffer is a disposable component. Since the hole to be machined on the end face 100 of the CFRP rotating body is a through hole, the cutting tool will penetrate through the end face 100 of the CFRP rotating body when drilling the hole, causing the cutting tool to be inserted into the buffer and rendering the buffer unusable.

[0061] More preferably, the output end of the cylinder 500 is provided with a top plate 510, and a buffer is screwed onto the top plate 510. There are two buffers, which are screwed onto the two ends of the top plate 510 respectively.

[0062] 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.

[0063] 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.

[0064] 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. An interlaminar delamination prevention device for CFRP rotary body end face hole making, suitable for CFRP rotary body end face hole making, characterized in that, include: The substrate has a positioning part provided on it, and the positioning part is inserted into the positioning hole on the end face of the CFRP rotating body. The clamping structure has an open end, into which the end face of the CFRP rotating body and the substrate are inserted and abutted against the two sides of the open end respectively. A cylinder is connected to a base plate, and a buffer is connected to the output end of the cylinder. One end of the buffer penetrates the base plate and extends or retracts under the action of the cylinder output end.

2. The device for CFRP rotary body end face hole drilling according to claim 1, characterized in that, There are two positioning parts and two cylinders, and the two positioning parts and two cylinders are symmetrically distributed with the clamping part as the center.

3. The device for CFRP rotary body end face hole drilling according to claim 1 or 2, characterized in that, The positioning part is a positioning component, and the two ends of the positioning component along its axial direction are a first connecting end and a second connecting end, wherein the first connecting end is connected to the substrate, and the second connecting end is connected to the positioning hole on the end face of the CFRP rotating body.

4. The device for CFRP rotary body end face hole drilling according to claim 3, characterized in that, The positioning element is arranged in a stepped shape, and the diameter of the middle part of the positioning element is larger than the diameter of the first connecting end and the diameter of the second connecting end.

5. The device for CFRP rotary body end face hole drilling according to claim 1 or 2, characterized in that, The clamping structure includes a C-shaped clamping member and a locking member connected to one side wall of the opening end of the clamping member. The end face of the CFRP rotating body and the substrate are both inserted into the clamping member. By rotating the locking member, the substrate abuts against the other side wall of the opening end of the clamping member, and the end face of the CFRP rotating body abuts against the locking member.

6. The device for CFRP rotary body end face hole drilling according to claim 5, characterized in that, One end of the locking element is threaded to the clamping element, and the other end of the locking element is provided with a pad.

7. The device for CFRP revolution body end face hole drilling according to claim 1 or 2, characterized in that, The buffer part is a buffer component. One end of the buffer component passes through the base plate along the output direction of the cylinder and is connected to the output end of the cylinder. The other end of the buffer component is a free end. In the initial state, there is a gap between the free end of the buffer component and the end face of the CFRP rotating body.

8. The device for CFRP rotary body end face hole drilling according to claim 7, characterized in that, The buffer is arranged in a stepped shape, and the diameter of the end of the buffer connected to the cylinder output end is smaller than the diameter of the end of the buffer that abuts against the end face of the CFRP rotating body.

9. The device for CFRP rotary body end face hole drilling according to claim 7, characterized in that, The cylinder output end is provided with a top plate, and a buffer is screwed onto the top plate. There are two buffers, which are screwed onto the two ends of the top plate respectively.

10. The anti-delamination device for drilling holes on the end face of a CFRP rotating body according to claim 7, characterized in that, The cushioning component is made of rubber.

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