Device and method for manufacturing defects of reference blocks for nondestructive testing of carbon fiber parts

Abstract

The invention belongs to the technical field of manufacturing and detection of composite material parts, and particularly relates to a device and a method for manufacturing defects of a reference block for nondestructive testing of a carbon fiber part. The punches are integrated through the stretchable supporting rod, the stamping rod and the tool rotating disc, rapid replacement of the punches is achieved, meanwhile, stamping-wrapping integration is achieved, the outline precision of the cutting edge of a polytetrafluoroethylene film is guaranteed by pressing the punches downwards, the polytetrafluoroethylene film directly falls into tinfoil above a wrapping pressing nozzle after a partition plate is opened, and the production efficiency is improved. The wrapping pressing nozzle is controlled by the knob, and the tightening degree can be adjusted according to different diameters, so that the defect precision and the defect quality can be ensured by adopting the tool structure. By the adoption of the method, hard mistake proofing in the combined process is optimized, the efficiency of manufacturing the defects, especially the small-diameter defects, is improved, meanwhile, the shape follow-up degree and the wrapping compactness of the tinfoil wrapping polytetrafluoroethylene film are guaranteed, the internal quality of the defects is improved, and the manufacturing stability is improved.

Description

Technical Field

[0001] The invention belongs to the technical field of composite material parts manufacturing and detection, and particularly relates to a device and method for manufacturing carbon fiber parts and nondestructively detecting defects of comparison test blocks. Background Art

[0002] With the extensive application of carbon fiber composite materials in the field of aircraft manufacturing, the demand for ultrasonic non-destructive testing of internal damage of carbon fiber laminate structures is increasing. Non-destructive testing of composite materials mainly uses comparison test blocks to verify the reliability and repeatability of the non-destructive testing system, adjust the detection sensitivity, verify the detection resolution of the upper and lower surfaces, and evaluate defects. Therefore, the design, production and evaluation of comparison test blocks can directly affect the accuracy of non-destructive testing results. At present, the common method of artificially simulating the delamination and debonding defects between carbon fiber laminates is to use two layers of polytetrafluoroethylene films of the same thickness and size and closed circumference (or four sides) with an air gap in the middle to simulate the contents (i.e., air) wrapped between the layers, and then use two layers of tin foil slightly larger than the polytetrafluoroethylene film to wrap it tightly together according to the shape of the polytetrafluoroethylene film. However, based on different acceptance technical standards, artificial defects of different sizes, especially those with a diameter of less than 5mm and different shapes, are often cut first and then wrapped in the process. In this process, multiple tools are used and a large amount of labor costs are consumed, resulting in low preparation efficiency, and the quality of defects wrapped by hand is also not stable. Therefore, it is necessary to explore a method for producing artificial defects that can realize the integration of multi-size and multi-shape tools and the integrated cutting and packaging of tin foil and polytetrafluoroethylene film.

[0003] The present invention aims to solve the problems of multiple tool replacement and low efficiency of manual defect packaging in the process of artificial defect production. The present invention provides a punching device with replaceable punches for cutting polytetrafluoroethylene film and tin foil. The device can realize the integrated cutting and packaging of polytetrafluoroethylene film and tin foil while punching artificial defects. A method for preparing artificial defects of composite material comparison test blocks is provided. The method can solve the problems of frequent tool replacement and poor effect of manual defect packaging in the process of artificial defect production, especially low efficiency and poor qualified rate of small diameter defects.

[0004] The technical solution adopted by the present invention is as follows:

[0005] The device is used for manufacturing carbon fiber parts nondestructive testing comparison test block defects. By using the pressing force of the stamping as the power, the replaceable punch is used to cut the polytetrafluoroethylene film with a certain toughness and thickness, and then the tin foil and the polytetrafluoroethylene film are wrapped by the stretchable clamping device. It includes a stamping handle, a bracket, a support rod, a stamping tray lifting button, a stamping structure, a wrapping structure and a base.

[0006] The punching handle includes a downward pressing handle, a handle shaft, a pressing block connecting shaft, and a pressing block. The downward pressing handle is connected to one end of the handle shaft by screws; the handle shaft is inserted into the bracket and connected by a bearing so that it can rotate freely; the pressing block connecting shaft connects the handle shaft and the pressing block by screws to play a transmission role; the pressing block passes through the bracket and is connected to the punch wheel suspension rod through internal threads and rubber pads, and is the main working component in the punching process. The function of the component punching handle is to provide downward punching power for the defective packaging when the upper polytetrafluoroethylene film and the lower polytetrafluoroethylene film are punched;

[0007] The bracket is inserted into the support rod by the hole on the bracket, and is clamped in the installation position by the rubber ring and rubber pad inside the hole on the bracket, and is fastened to the support rod by screws, so as to balance the linkage of the pressing handle, the handle shaft and the pressing block, provide stability for the entire pressing process, and provide support for the suspension of the stamping structure;

[0008] The support rod inserts one end of the support rod with thread into the blind hole of the base, and rotates the support rod to fasten it with the base, so that it is connected with the base and placed on a stable plane as a positioning reference for all other components;

[0009] The punching tray lifting button is connected to the bracket through a bearing and a sleeve. By adjusting the tightness of the lifting button, it is convenient to manually adjust the lifting of the punching tray. Then tighten the knob to give the tray a tightening force, thereby providing sufficient operating space for the upper tin foil and the upper polytetrafluoroethylene film, the lower polytetrafluoroethylene film to fall, the packaging process, and the removal of finished products with artificial defects;

[0010] The stamping structure includes a punch-changing wheel hanging rod, a punch-changing roller, a round punch and a square punch, a stamping tray and a drop-mouth switch; the punch-changing wheel hanging rod is connected to the center of the punch-changing roller disc by screws, and the punch-changing wheel hanging rod serves to connect the bracket and the punch-changing roller disc, and the punch-changing roller disc is integrated with round punches, square punches and other punches; the punch has a hollow structure at the head, which plays a role in controlling the shape of the defect; the internal structure of the stamping tray is a cam, a spring and a spring sensor, and a baffle, wherein the spring is adhered to the sensor on one side and in contact with the cam direction, and the other side is adhered to the baffle, and by turning the drop-mouth switch, the convex point of the cam is pressed on the sensor, and the spring is compressed to pop out the baffle; the drop-mouth switch is connected to the cam inside the stamping tray by screws, and by turning the drop-mouth switch, the opening and closing of the drop-mouth baffle can be controlled, and at the same time, whether the defect falls onto the packaging operation table can be controlled. The function of the component stamping structure is to provide replaceable punches for the production needs of defects of multiple sizes and shapes, and the metal punch can be quickly replaced by rotating the punch-changing roller disc;

[0011] The wrapping structure includes a wrapping nozzle switch, a wrapping nozzle and a wrapping tray. The wrapping nozzle switch controls the tightening and loosening of the wrapping nozzle. The wrapping nozzle is a multi-tooth annular baffle. When a defect falls on the nozzle, the defect can be wrapped by tightening the nozzle. The wrapping tray plays the role of tightening the wrapping nozzle under the control of the wrapping nozzle switch. Its internal structure is a cam, a spring and a spring sensor, wherein the spring is attached to the sensor on one side and in contact with the cam direction, and the other side is attached to the wrapping nozzle. By turning the wrapping nozzle switch, the convex point of the cam is pressed on the sensor, and the compression spring pops out and closes the nozzle; the wrapping nozzle switch is connected to the cam inside the wrapping tray by screws. The function of the wrapping structure is to control the opening and closing of the wrapping nozzle by adjusting the wrapping nozzle switch, so as to achieve a tight and conformable wrapping of the lower layer of tin foil in the artificial defect.

[0012] The base is placed on a horizontal operating surface and is threadedly connected to the bracket through a rubber pad and the bracket end, and is connected to the support rod and placed on a stable plane as a positioning reference for all other components.

[0013] The punching handle, the component bracket, the punching tray lifting button, the component punching structure, and the component packaging structure are connected and assembled together on the component support rod and the component base fixed together on the horizontal operating table through adjustable screws.

[0014] Based on different ultrasonic testing requirements, the shapes and sizes of artificial defects are also different. For artificial defects of larger or thicker materials, the punch drop height can be adjusted by adjusting the punch tray, combined with multiple pulls on the punch handle to achieve precise cutting of the material.

[0015] The tooling realizes the automatic cutting of the upper polytetrafluoroethylene film and the lower polytetrafluoroethylene film, and the automatic packaging of the upper tin foil and the lower tin foil by using a punching rod, and all the parts are connected by adjustable screws.

[0016] The method for using the nondestructive testing comparison test block defect device for manufacturing carbon fiber parts is as follows:

[0017] Step 1: Assemble the components together according to the tool structure, and place the base on a stable plane with a handheld bracket to ensure that the cutting accuracy of the polytetrafluoroethylene film will not be affected by tilt or vibration during work.

[0018] Step 2: Adjust the punch changing roller, select a round punch or square punch of appropriate shape and size according to the requirements of the target artificial defect, align it with the sunken part of the punching tray, and place a layer of tin foil and a double layer of polytetrafluoroethylene film on the punching tray.

[0019] Step 3: When cutting the polytetrafluoroethylene film with a round punch or a square punch, the cutting depth of the punch is different due to the different single-layer thickness of the tin foil and the film. The punch tray lifting button is used to adjust the punch's falling cutting depth. At the same time, the pressing handle in the punch handle is repeatedly operated to complete the overall cutting.

[0020] Step 4: Adjust the packaging nozzle switch to open the packaging nozzle, place the lower tin foil on the packaging tray, embed it in the depression of the packaging nozzle, rotate the drop switch to make the upper tin foil, upper polytetrafluoroethylene film, and lower polytetrafluoroethylene film fall on the lower tin foil, adjust the punching tray lifting button to raise the punching tray to the maximum height, adjust the packaging nozzle switch to close the packaging nozzle, and complete the overall packaging of artificial defects.

[0021] The tool integrates the punch through a stretchable support rod, a punching rod, and a tool turntable, which enables rapid replacement of the punch and realizes punching-wrapping integration. The punch is pressed down to ensure the contour accuracy of the cutting edge of the polytetrafluoroethylene film. After opening the partition, the polytetrafluoroethylene film falls directly into the tin foil above the wrapping nozzle. The wrapping nozzle is controlled by a knob and the tightening degree can be adjusted according to different diameters. Therefore, the use of this tool structure can ensure both the accuracy and quality of defects.

[0022] Advantages and effects of the present invention:

[0023] The present invention integrates the punch through a stretchable support rod, a punching rod and a tool turntable, thereby realizing rapid replacement of the punch and realizing punching-wrapping integration. The punch is pressed down to ensure the contour accuracy of the cutting edge of the polytetrafluoroethylene film. After the partition is opened, the polytetrafluoroethylene film directly falls into the tin foil above the wrapping nozzle. The wrapping nozzle is controlled by a knob and the tightening degree can be adjusted according to different diameters. Therefore, the use of this tool structure can ensure both the accuracy of the defect and the quality of the defect.

[0024] Compared with the traditional manual defect packaging process, the use of this tool not only optimizes the combined process to achieve hard error prevention, but also improves the efficiency of defect production, especially small-diameter defects. At the same time, it ensures the conformality and wrapping tightness of the tin foil wrapped polytetrafluoroethylene film, improves the internal quality of the defect, and improves the stability of production. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] Figure 1 Tool diagram;

[0026] Figure 2 Schematic diagram of the punch handle structure;

[0027] Figure 3 Schematic diagram of stamping structure;

[0028] Figure 4 Schematic diagram of packaging structure;

[0029] Figure 5 Schematic diagram of artificial defect structure.

[0030] Among them: 1 stamping handle; 1-1 pressing handle; 1-2 handle shaft; 1-3 pressing block connecting shaft; 1-4 pressing block; 2 bracket; 3 support rod; 4 stamping tray lifting button; 5 stamping structure; 5-1 punch wheel hanging rod; 5-2 punch roller; 5-3 round punch; 5-4 square punch; 5-5 stamping tray; 5-6 drop mouth switch; 6 packaging structure; 6-1 packaging nozzle switch; 6-2 packaging nozzle; 6-3 packaging tray; 7 base; 8 artificial defects; 8-1 upper tin foil; 8-2 upper polytetrafluoroethylene film; 8-3 lower polytetrafluoroethylene film; 8-4 lower tin foil. DETAILED DESCRIPTION

[0031] Embodiment 1:

[0032] The present invention provides a tool structure for manufacturing a nondestructive testing and comparison test block defect device for carbon fiber parts. The tool mainly uses the pressing force of the punch as the power to cut the polytetrafluoroethylene film with a certain toughness and thickness with a replaceable punch, and then uses a stretchable clamping device to wrap the tin foil and the polytetrafluoroethylene film. The tool includes a punching handle 1, a bracket 2, a support rod 3, a punching tray lifting button 4, a punching structure 5, a wrapping structure 6 and a base 7.

[0033] The stamping handle 1 includes a pressing handle 1-1, a handle shaft 1-2, a pressure block connecting shaft 1-3, and a pressure block 1-4. The pressing handle 1-1 is connected to one end of the handle shaft 1-2 by screws; the handle shaft 1-2 is inserted into the bracket 2 and connected by a bearing so that it can rotate freely; the pressure block connecting shaft 1-3 connects the handle shaft 1-2 and the pressure block 1-4 by screws to play a transmission role; the pressure block 1-4 passes through the bracket 2 and is connected to the punch wheel suspension rod 5-1 through internal threads and rubber pads, and is the main working component of the stamping process. The function of the component stamping handle 1 is to provide downward stamping power for the defect packaging when the upper polytetrafluoroethylene film 8-2 and the lower polytetrafluoroethylene film 8-3 are completed;

[0034] The bracket 2 is inserted into the support rod 3 by inserting the hole on the bracket 2, and after being clamped in the installation position by the rubber ring and rubber pad inside the hole on the bracket 2, it is fastened to the support rod by screws, and its function is to balance the linkage of the pressing handle 1-1, the handle shaft 1-2 and the pressing block 1-4, provide stability for the entire pressing process, and provide support for the suspension of the stamping structure 5;

[0035] The support rod 3 inserts one end of the support rod 3 with a thread into the blind hole of the base 7, and rotates the support rod to fasten it with the base 7, so that it is connected with the base 7 and placed on a stable plane as a positioning reference for all other components;

[0036] The punching tray lifting button 4 is connected to the bracket 2 through a bearing and a sleeve. By adjusting the tightness of the lifting button, it is convenient to manually adjust the lifting of the punching tray 5-5, and then tighten the knob to give the tray a tightening force, thereby providing sufficient operating space for the upper tin foil 8-1 and the upper polytetrafluoroethylene film 8-2, the lower polytetrafluoroethylene film 8-3 to fall, the packaging process, and the removal of the finished product of the artificial defect 8;

[0037] The punching structure 5 includes a punch-changing wheel hanging rod 5-1, a punch-changing roller 5-2, a round punch 5-3 and a square punch 5-4, a punching tray 5-5 and a drop-off switch 5-6; the punch-changing wheel hanging rod 5-1 is connected to the center of the punch-changing roller 5-2 disc by screws, and the punch-changing wheel hanging rod 5-1 serves to connect the bracket 2 and the punch-changing roller 5-2 disc, and the punches such as the round punch 5-3 and the square punch 5-4 are integrated on the punch-changing roller 5-2 disc; the punch has a hollow structure at the head, which plays a role in controlling The role of defect shape; the internal structure of the stamping tray 5-5 is a cam, a spring and a spring sensor, and a baffle, wherein the spring is adhered to the sensor on one side and in contact with the cam direction, and the other side is adhered to the baffle. By turning the drop-mouth switch 5-6, the cam protrusion is pressed on the sensor, and the spring is compressed to pop out the baffle; the drop-mouth switch 5-6 is connected to the internal cam of the stamping tray 5-5 by screws. By turning the drop-mouth switch, the opening and closing of the drop-mouth baffle can be controlled, and at the same time, whether the defect falls onto the packaging operation table can be controlled. The function of the component stamping structure 5 is to provide replaceable punches for the production needs of defects of multiple sizes and shapes. The metal punch can be quickly replaced by rotating the punch-changing roller 5-2 disc;

[0038] The packaging structure 6 includes a packaging nozzle switch 6-1, a packaging nozzle 6-2 and a packaging tray 6-3. The packaging nozzle switch 6-1 controls the tightening and loosening of the packaging nozzle. The packaging nozzle 6-2 is a multi-tooth annular baffle. When a defect falls on the nozzle, the defect can be tightened by tightening the nozzle. The packaging tray 6-3 plays the role of tightening the packaging nozzle 6-2 under the control of the packaging nozzle switch 6-1. Its internal structure is a cam, a spring and a spring sensor, wherein the spring is adhered to the sensor on one side and contacts with the cam direction, and the other side is adhered to the packaging nozzle 6-2. By toggling the packaging nozzle switch 6-1, the convex point of the cam is pressed on the sensor, and the spring is compressed to pop out and close the nozzle; the packaging nozzle switch 6-1 is connected to the internal cam of the packaging tray 6-3 by screws. The function of the wrapping structure 6 is to control the opening and closing of the wrapping nozzle 6-2 by adjusting the wrapping nozzle switch 6-1, so as to achieve tight and conformable wrapping of the lower layer of tin foil 8-4 in the artificial defect 8.

[0039] The base 7 is placed on a horizontal operating surface and is threadedly connected to the bracket 2 through a rubber pad and the bracket end, and is connected to the support rod 3 and placed on a stable plane as a positioning reference for all other components.

[0040] The punching handle 1, the component bracket 2, the punching tray lifting button 4, the component punching structure 5, and the component packaging structure 6 are connected and assembled together on the component support rod 3 and the component base 7 fixed together on the horizontal operating table through adjustable screws.

[0041] Based on different ultrasonic testing requirements, the shapes and sizes of artificial defects are also different. For artificial defects of larger or thicker materials, the punch drop height can be adjusted by adjusting the punch tray 5-5, and the material can be accurately cut by pulling the punch handle 1 multiple times.

[0042] The tooling realizes the automatic cutting of the upper polytetrafluoroethylene film 8-2 and the lower polytetrafluoroethylene film 8-3, and the automatic packaging of the upper tin foil 8-1 and the lower tin foil 8-4 by using a punching rod, and all parts are connected by adjustable screws.

[0043] Embodiment 2:

[0044] The method for using the nondestructive testing comparison test block defect device for manufacturing carbon fiber parts is as follows:

[0045] The first step: assemble the components together according to the tool structure, hold the bracket 2 and place the base 7 on a stable plane to ensure that the cutting accuracy of the polytetrafluoroethylene film will not be affected by tilt or vibration during the working process.

[0046] Step 2: Adjust the punch changing roller 5-2, select the round punch 5-3 and the square punch 5-4 of appropriate shape and size according to the requirements of the target artificial defect 8, align them with the sunken part of the punching tray 5-5, and place a layer of tin foil and a double layer of polytetrafluoroethylene film on the punching tray 5-5.

[0047] Step 3: During the process of cutting the polytetrafluoroethylene film, the cutting depth of the round punch 5-3 and the square punch 5-4 is different due to the different single-layer thickness of the tin foil and the film. The cutting depth of the punch is adjusted by pressing the punch tray lifting button 4. At the same time, the pressing handle 1-1 in the punch handle 1 is repeatedly operated to complete the overall cutting.

[0048] Step 4: adjust the wrapping nozzle switch 6-1 to open the wrapping nozzle 6-2, place the lower tin foil 8-4 on the wrapping tray 6-3, embed it in the depression of the wrapping nozzle 6-2, rotate the drop mouth switch 5-6 to make the upper tin foil 8-1, the upper polytetrafluoroethylene film 8-2, and the lower polytetrafluoroethylene film 8-3 fall on the lower tin foil 8-4, adjust the punching tray lifting button 4 to raise the punching tray 5-5 to the maximum height, adjust the wrapping nozzle switch 6-1 to close the wrapping nozzle 6-2, and complete the overall wrapping of the artificial defect 8.

Claims

1. A device for manufacturing carbon fiber parts for nondestructive testing of comparison test block defects, characterized in that: It comprises a punching handle (1), a bracket (2), a support rod (3), a punching tray lifting button (4), a punching structure (5), a packaging structure (6) and a base (7); The punching handle (1), the component bracket (2), the punching tray lifting button (4), the punching structure (5), and the packaging structure (6) are connected and assembled together on the support rod (3) and the base (7) fixed together on the horizontal operating table through adjustable screws; The punching handle (1) comprises a pressing handle (1-1), a handle shaft (1-2), a pressing block connecting shaft (1-3), and a pressing block (1-4); the pressing handle (1-1) is connected to one end of the handle shaft (1-2) by means of a screw; the handle shaft (1-2) is inserted into a bracket (2) and connected by means of a bearing so that it can rotate freely; the pressing block connecting shaft (1-3) connects the handle shaft (1-2) and the pressing block (1-4) by means of a screw to play a transmission role; the pressing block (1-4) passes through the bracket (2) and is connected to the punching wheel suspension rod (5-1) by means of an internal thread and a rubber pad; The bracket (2) is mounted on the support rod (3) through the hole on the bracket (2), and after being clamped in the installation position by the rubber ring and rubber pad inside the hole on the bracket (2), it is fastened to the support rod by screws, and its function is to balance the linkage of the downward pressing handle (1-1), the handle shaft (1-2) and the pressing block (1-4); The support rod (3) inserts one end of the support rod (3) with a thread into the blind hole of the base (7), and rotates the support rod to fasten it to the base (7), so that it is connected to the base (7) and placed on a stable plane as a positioning reference for all other components; The punching tray lifting button (4) is connected to the bracket (2) via a bearing and a sleeve. By adjusting the tightness of the lifting button, the lifting of the punching tray (5-5) can be manually adjusted. Then, the knob is tightened to give the tray a tightening force. The punching structure (5) comprises a punch-changing wheel hanging rod (5-1), a punch-changing roller (5-2), a round punch (5-3), a square punch (5-4), a punching tray (5-5) and a drop-off switch (5-6); the punch-changing wheel hanging rod (5-1) is connected to the center of the punch-changing roller (5-2) disc by screws, the punch-changing wheel hanging rod (5-1) plays the role of connecting the bracket (2) and the punch-changing roller (5-2) disc, and the punches of the round punch (5-3) and the square punch (5-4) are integrated on the punch-changing roller (5-2) disc; The packaging structure (6) comprises a packaging nozzle switch (6-1), a packaging nozzle (6-2) and a packaging tray (6-3). The packaging tray (6-3) is controlled by the packaging nozzle switch (6-1) to tighten the packaging nozzle (6-2). Its internal structure comprises a cam, a spring and a spring sensor. One side of the spring sensor is in contact with the cam direction and the other side is attached to the packaging nozzle (6-2). By turning the packaging nozzle switch (6-1), the convex point of the cam is pressed on the sensor, and the spring is compressed to pop out and close the nozzle. The packaging nozzle switch (6-1) is connected to the cam inside the packaging tray (6-3) by screws.

2. The device for manufacturing carbon fiber parts and nondestructive testing of comparison test block defects according to claim 1, characterized in that: The wrapping pressure nozzle (6-2) is a multi-tooth annular baffle. When a defect falls on the pressure nozzle, the purpose of wrapping the defect can be achieved by tightening the pressure nozzle.

3. The device for manufacturing carbon fiber parts and nondestructive testing of comparison test block defects according to claim 1 or 2, characterized in that: The punch has a hollow structure at the head, which plays a role in controlling the shape of defects.

4. The device for manufacturing carbon fiber parts and nondestructive testing of comparison test block defects according to claim 1 or 2, characterized in that: The internal structure of the punching tray (5-5) is a cam, a spring and a spring sensor, and a baffle, wherein one side of the spring is adhered to the sensor and contacts the cam, and the other side is adhered to the baffle. By turning the drop-off switch (5-6), the convex point of the cam is pressed on the sensor, compressing the spring to eject the baffle.

5. The device for manufacturing carbon fiber parts and nondestructive testing of comparison test block defects according to claim 3, characterized in that: The internal structure of the punching tray (5-5) is a cam, a spring and a spring sensor, and a baffle, wherein one side of the spring is adhered to the sensor and contacts the cam, and the other side is adhered to the baffle. By turning the drop-off switch (5-6), the convex point of the cam is pressed on the sensor, compressing the spring to eject the baffle.

6. The device for manufacturing carbon fiber parts and nondestructive testing of comparison test block defects according to claim 1, 2 or 5, characterized in that: The drop-off switch (5-6) is screw-connected to the internal cam of the punching tray (5-5). By turning the drop-off switch, the opening and closing of the drop-off baffle can be controlled, and at the same time, whether the defect falls onto the packaging operation table can be controlled.

7. The device for manufacturing carbon fiber parts and nondestructive testing of comparison test block defects according to claim 3, characterized in that: The drop-off switch (5-6) is screw-connected to the internal cam of the punching tray (5-5). By turning the drop-off switch, the opening and closing of the drop-off baffle can be controlled, and at the same time, whether the defect falls onto the packaging operation table can be controlled.

8. The device for manufacturing carbon fiber parts and nondestructive testing of comparison test block defects according to claim 4, characterized in that: The drop-off switch (5-6) is screw-connected to the internal cam of the punching tray (5-5). By turning the drop-off switch, the opening and closing of the drop-off baffle can be controlled, and at the same time, whether the defect falls onto the packaging operation table can be controlled.

9. The method for using the device for manufacturing nondestructive testing comparison test block defects of carbon fiber parts according to any one of claims 1 to 8, characterized in that: Here are the steps: The first step is to assemble the components together according to the tool structure, hold the bracket (2) and place the base (7) on a stable plane to ensure that the cutting accuracy of the polytetrafluoroethylene film will not be affected by tilt or vibration during the working process; Step 2: Adjust the punch changing roller (5-2), select a round punch (5-3) and a square punch (5-4) of suitable shape and size according to the requirements of the target artificial defect (8), align them with the sunken part of the punching tray (5-5), and place a layer of tin foil and a double layer of polytetrafluoroethylene film on the punching tray (5-5); Step 3: When the round punch (5-3) and the square punch (5-4) are cutting the polytetrafluoroethylene film, the cutting depth of the punch is different due to the different single-layer thickness of the tin foil and the film. The punch tray lifting button (4) is used to adjust the falling cutting depth of the punch; at the same time, the pressing handle (1-1) in the punch handle (1) is repeatedly operated to complete the overall cutting; Step 4: adjust the packaging nozzle switch (6-1) to open the packaging nozzle (6-2), place the lower tin foil (8-4) on the packaging tray (6-3), embed it in the concave part of the packaging nozzle (6-2), rotate the lower drop switch (5-6), so that the upper tin foil (8-1), the upper polytetrafluoroethylene film (8-2), and the lower polytetrafluoroethylene film (8-3) fall on the lower tin foil (8-4), adjust the punching tray lifting button (4) to raise the punching tray (5-5) to the maximum height, adjust the packaging nozzle switch (6-1) to close the packaging nozzle (6-2), and complete the overall packaging of the artificial defect (8).

10. The method for using the device for manufacturing nondestructive testing of comparison test blocks for carbon fiber parts according to claim 9, characterized in that: The base (7) is placed on a horizontal operating surface and is threadedly connected to the bracket (2) via a rubber pad and the bracket end.

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