A repair system for peri-hole defects - adhesive and a self-repair method for damage

Abstract

The present invention provides a repair system for adhesives around holes and a self-repair method for damage. The system includes a numerically controlled (CNC) machine tool, a current or voltage control device, a temperature measurement system, brushes, a temperature control system, and a temperature-controlled tool. During machining, the current or voltage control device energizes the temperature control system, which controls the tool temperature. Based on the technical solution of the present invention, the intelligent temperature-controlled tool can, to a certain extent, reduce the drilling force required for the material, lower the difficulty of drilling and reaming the material, significantly improve tool quality and lifespan stability, improve the efficiency of the hole-making process, expand the hole diameter, eliminate burrs, and enhance hole-making accuracy and quality.

Description

Technical Field

[0001] The present invention relates to the technical field of CNC machine tool tools, and in particular to a repair system for adhesives that are defects around holes and a damage self-repair method. Background Art

[0002] Thermoset / thermoplastic composites have become a focus of attention for the international advanced materials industry and cutting-edge scientific research institutions, playing a vital role in the performance upgrade of the next generation of aerospace vehicles. When composite materials are used in primary load-bearing structural components, bolt connections are usually used due to the requirements of resistance to peeling, shearing, and torsion. The connection holes are complex and subject to severe stress concentration, which is a key part affecting the life of the component. This requires high-precision drilling and hole making in the composite materials. During the drilling process, the fibers are simultaneously subjected to shear and tension, as well as the axial force of the drill bit pushing outward. The constantly worn tool cannot instantly cut the fibers, resulting in poor hole quality in the initial drilling, which is always accompanied by burrs, delamination, tearing and other circumferential defects around the hole, and it is difficult to accurately control the inner diameter of the hole. In addition, the intense friction between the chips, the hole wall and the tool causes damage to the tool quality and shortens its life. After drilling, it is often necessary to expand the hole diameter, improve the processing accuracy and surface quality of the hole by reaming, boring, or grinding. Summary of the Invention

[0003] In response to the above-mentioned problems in the prior art, the present application proposes a repair system for peri-hole defects - adhesives.

[0004] A repair system for adhesive defects around holes includes a CNC machine tool, a current or voltage control device, a temperature measurement system, a brush, a temperature control system, and a temperature control tool. During machining on the CNC machine tool, the current or voltage control device energizes the temperature control system, which controls the tool temperature.

[0005] The temperature-controlled cutter has a hollow structure inside, and the hollow structure accommodates a temperature control device.

[0006] The opening direction of the hollow structure is toward the tail of the temperature-controlled tool.

[0007] The tool comprises a tool handle and a tool head, wherein the tool head is a solid structure or a partially solid structure.

[0008] The temperature control system is a ceramic heating rod, which is controlled by a current or voltage control device and can heat the thermoplastic matrix to the melting temperature and intelligently regulate the cooling process of the thermoplastic matrix to recrystallize the thermoplastic matrix.

[0009] The hollow structure also contains adhesive and a pressure tester. The side of the temperature-controlled tool is provided with holes for allowing the adhesive to flow out and detecting the adhesive pressure.

[0010] The output of the adhesive and the repair process are controlled by the repair device, and the glue-applying device responds to at least one of a temperature measurement system, a pressure detection system and a tool speed control system.

[0011] A self-repair method for a peri-hole defect-adhesive repair system includes the following steps:

[0012] Step S1, after drilling a hole in the composite material, detecting and locating the degree and position of defects around the hole;

[0013] Step S2: Select an intelligent temperature-controlled tool with a corresponding diameter and cutting edge according to the degree of damage around the hole and the hole diameter, preheat it to a certain temperature in advance, and insert it into the hole before the defects around the hole recrystallize;

[0014] Step S3, performing recrystallization of the peri-pore defects according to the preset heat preservation and gradient cooling modes of the intelligent temperature control box.

[0015] A method for self-repairing recrystallization damage of a pore-peripheral matrix comprises the following steps:

[0016] Step S1: Select an intelligent temperature-controlled tool with a corresponding diameter and cutting edge according to the hole diameter, and preheat it to above the substrate crystallization temperature in advance;

[0017] Step S2: After drilling a hole in the composite material, the intelligent temperature-controlled tool is quickly inserted into the hole, and the temperature is lowered according to the gradient cooling mode preset by the intelligent temperature-controlled box. The temperature is kept in the crystallization temperature range of the thermoplastic matrix for 10 minutes, and then naturally cooled to room temperature.

[0018] Step S3, after drilling the composite material, detecting and locating the degree and position of defects around the hole;

[0019] Step S4: Select an intelligent temperature-controlled tool with a corresponding diameter and cutting edge according to the degree of damage around the hole and the hole diameter, preheat it to above the melting temperature of the substrate, and then insert it into the hole;

[0020] Step S5: The matrix melt-recrystallization damage self-repair reaction is performed according to the preset heat preservation and gradient cooling mode of the intelligent temperature control box, and at the same time, the CNC machine tool applies a certain drilling force for extrusion and coating.

[0021] A method for repairing peri-hole damage, comprising the following steps:

[0022] Step S1, after drilling a hole in the composite material, detecting and locating the degree and position of defects around the hole;

[0023] Step S2: Select an intelligent temperature-controlled tool with a corresponding diameter and cutting edge according to the degree of damage around the hole and the hole diameter, preheat it to a certain temperature in advance, and then insert it into the hole;

[0024] Step S3, controlling the adhesive output rate through the adhesive repair device to apply a thermoplastic resin adhesive with high efficiency in repairing the peri-hole defect to the peri-hole defect;

[0025] Step S4: The adhesive reaction is carried out according to the heat preservation and gradient cooling mode preset by the intelligent temperature control box, and at the same time, the CNC machine tool applies a certain drilling force for extrusion and coating.

[0026] A method for repairing peri-hole damage, comprising the following steps:

[0027] Step S1, after drilling a hole in the composite material, detecting and locating the degree and position of defects around the hole;

[0028] Step S2, applying a thermoplastic resin adhesive having high efficiency in repairing peri-hole defects to the peri-hole defects;

[0029] Step S3: Select an intelligent temperature-controlled tool with a corresponding diameter and cutting edge according to the degree of damage around the hole and the hole diameter, preheat it to a certain temperature in advance, and then insert it into the hole;

[0030] Step S4: The adhesive reaction is carried out according to the heat preservation and gradient cooling mode preset by the intelligent temperature control box, and at the same time, the CNC machine tool applies a certain drilling force for extrusion and coating.

[0031] The glue coating control mechanism responds to a combination of a pressure sensor, a temperature sensor and a tool speed controller; while the tool speed controller adjusts the tool speed, it sends a first pressure adjustment signal to the glue coating control mechanism in advance of the pressure sensor and / or temperature sensor. After the glue coating control mechanism adjusts the glue coating pressure according to the first pressure adjustment signal of the tool speed controller, the pressure sensor and / or temperature sensor sends a second pressure adjustment signal to the glue coating control mechanism to correct the glue coating pressure.

[0032] The above technical features can be combined in various suitable ways or replaced by equivalent technical features, as long as the purpose of the present invention can be achieved.

[0033] The repair system for the hole defect-adhesive provided by the present invention has at least the following beneficial effects compared with the existing technology: This article develops an intelligent temperature-controlled tool for drilling, hole-making, hole-reaming and burr removal of difficult-to-process materials, especially fiber-reinforced materials. Its working principle is to use the tool and the workpiece to form a circuit, and pass an electric current to generate Joule heat and soften the material around the hole, thereby making the drilling and hole-reaming process smoother and eliminating burrs around the hole. The intelligent temperature-controlled tool can reduce the drilling force required for the material to a certain extent, reduce the difficulty of drilling and hole-reaming and hole-reaming of the material, greatly improve the quality and life stability of the tool, improve the efficiency of the hole-making process, expand the aperture, eliminate burrs, improve the accuracy and quality of hole-making, etc., improve the quality and life stability of the tool, and save production costs. BRIEF DESCRIPTION OF THE DRAWINGS

[0034] The present invention will be described in more detail below based on embodiments and with reference to the accompanying drawings, wherein:

[0035] Figure 1 Shows a schematic diagram of the cross-sectional structure of the tool of the present invention;

[0036] Figure 2 A schematic diagram showing the structure of a tool with blades of different depths according to the present invention is shown;

[0037] Figure 3 Shows a schematic diagram of a multi-channel current and voltage intelligent control device of the present invention;

[0038] Figure 4 Shows a schematic diagram of the ceramic heating rod device of the present invention;

[0039] Figure 5 shows a schematic diagram of the brush device of the present invention;

[0040] Figure 6 Shows the working diagram of the intelligent temperature control tool of the present invention;

[0041] Figure 7 A schematic diagram of the drilling and hole-reaming finishing working system of the intelligent temperature-controlled tool of the present invention is shown. DETAILED DESCRIPTION

[0042] The present invention will be further described below with reference to the accompanying drawings.

[0043] The present invention provides a temperature-controlled tool. In one embodiment, Figure 1 As shown, the temperature-controlled tool has a total length of 100mm, a tool diameter of 6mm, a hollow structure from the handle to the tip 10mm away, an internal diameter of 3mm, a chip groove length of 50mm, an angle of 30°, and the chip groove depth can be set according to the characteristics of the processed material. First, place the electrically controlled ceramic heating rod (such as Figure 4 As shown) put it into the tool from the handle, Figure 3 As shown, the ceramic heating rod is connected to a multi-channel current and voltage intelligent control device to achieve heating. Secondly, the tool has the functions of drilling, hole making and hole expansion, with small cutting volume and good guidance, such as Figure 2 As shown in the figure, two depths of chip grooves are designed to improve chip removal performance. The tool can also be used only for periphery heating without chip grooves. Figure 6 As shown, the multi-channel current and voltage intelligent control device can perform PID control on multiple power supplies at the same time and set the output voltage and current according to experimental needs.

[0044] In one embodiment, Figure 7As shown, the present invention provides an intelligent temperature-controlled tool drilling and hole-making and hole-reaming finishing system. The intelligent temperature-controlled tool drilling and hole-reaming finishing system includes: a CNC machine tool, a multi-channel current and voltage intelligent control device, an intelligent temperature-controlled tool, an infrared temperature measurement system, a brush (such as Figure 5 (as shown) and ceramic heating rods. The intelligent temperature-controlled tool drilling and reaming finishing system functions to power a multi-channel current and voltage intelligent control device during the CNC machine tool drilling and reaming finishing process. This heat is then transferred to the thermally conductive temperature-controlled tool, enabling intelligent temperature control of the drilling and reaming finishing process. This reduces the difficulty of drilling and reaming finishing, improves tool quality and lifespan, improves reaming efficiency, increases aperture, eliminates burrs, enhances drilling accuracy and quality, and reduces production costs.

[0045] In one embodiment, the present invention provides a method for temperature control of the recrystallization process of the matrix around the hole and its damage self-repair based on mechanical and thermal coupling analysis. During the drilling process of thermoplastic composite materials, the low thermal conductivity of the thermoplastic matrix and the semi-enclosed space inside the hole easily cause heat accumulation along the axial direction, causing the thermoplastic matrix to undergo a phase transition, and the matrix interface bonding force decreases, leading to the initiation of damage such as delamination and debonding. In addition, during the cooling process after drilling, the matrix around the hole will exhibit recrystallization behavior, and the crystallization process is closely related to the cooling rate. Conventional cooling methods rapidly cool the thermoplastic matrix around the hole, shortening the optimal crystallization time of the thermoplastic matrix, reducing the degree of crystallinity, initiating crystallization defects, resulting in loss of stiffness around the hole, and significantly reducing the bearing capacity of the structural connection hole, seriously affecting the mechanical properties of the structure, and burying major hidden dangers in the service process of aerospace products.

[0046] To improve the crystallinity during the cooling process around the hole, ensure the quality around the hole, and guarantee the load-bearing capacity of the connecting hole, a temperature control method for the recrystallization process of the matrix around the hole and its mechanical-thermal coupling damage self-repair method are proposed for drilling holes in thermoplastic composite materials. This method provides intelligent temperature control technology to ensure the recrystallization behavior of the thermoplastic matrix, and also provides technical support for the timely mechanical-thermal coupling damage self-repair of the matrix around the hole, thereby minimizing the generation of crystal defects in the matrix around the hole and improving the load-bearing capacity and structural mechanical properties around the hole. To a certain extent, it solves the damage problems such as delamination, tearing, and debonding around the hole, improves the load-bearing capacity and structural mechanical properties of the connecting hole, improves the hole-making quality and material service life, saves material and labor production costs, and generates certain economic benefits.

[0047] The working principle of the temperature control and damage self-repair method for the recrystallization process of the matrix around the hole based on mechanical-thermal coupling analysis is as follows: Thermoplastic matrices have the advantage of melt recrystallization. That is, after the matrix reaches the melting temperature (Tm), the matrix can be recrystallized by intelligently controlling the cooling process, thereby improving the matrix crystallinity and the stiffness of the matrix around the hole, thereby obtaining a structural component with a high load-bearing capacity around the hole. During the drilling process, damage such as burrs, delamination, and tears around the hole are inevitable. It is necessary to use an intelligent temperature-controlled tool to recrystallize the matrix around the hole of the thermoplastic composite material while also considering the self-repair of burrs, delamination, and tears around the hole. Therefore, combining the intelligent temperature control performance of the temperature-controlled tool with the characteristics of melt recrystallization of the thermoplastic matrix, after drilling the thermoplastic composite hole, the intelligent temperature-controlled tool, preheated to the melting temperature of the thermoplastic matrix, is quickly inserted into the hole. The temperature is then cooled according to the gradient cooling mode preset by the intelligent temperature-controlled box. The temperature is maintained in the crystallization temperature range of the thermoplastic matrix for 10 minutes, and then naturally cooled to room temperature.

[0048] In addition to using the intelligent temperature-controlled tool to regulate the temperature of the recrystallization process of the matrix around the hole, it is also possible to select an intelligent temperature-controlled tool with corresponding cutting toughness to perform drilling and hole making at a certain temperature according to the processing difficulty of thermoplastic resin fiber reinforced composite materials. It is also possible to select an intelligent temperature-controlled tool with corresponding diameter and cutting toughness to perform hole expansion finishing according to the hole making accuracy and quality requirements. And according to the degree of mechanical and thermal coupling damage around the hole, select the corresponding intelligent temperature-controlled tool to perform self-repair coating of the matrix damage around the hole under a certain temperature and pressure. This can not only make the drilling and hole making and hole expansion processes smoother and easier to meet the product's precision requirements, but also can perform temperature control on the recrystallization process of the matrix around the hole based on mechanical and thermal coupling analysis, and can also make the matrix around the hole be extruded and coated under the drilling force and temperature of the intelligent temperature-controlled tool to achieve self-repair of mechanical and thermal coupling damage, thereby ensuring hole making accuracy and quality and improving production efficiency.

[0049] This method provides intelligent temperature control technology guarantee for the recrystallization behavior of the thermoplastic matrix, avoiding the generation of crystal defects in the matrix around the pores. It also provides technical support for the timely self-repair of mechanical and thermal coupling damage of the matrix around the pores, thereby improving the bearing capacity around the pores and the mechanical properties of the structure.

[0050] In one embodiment, a system for controlling the temperature during the recrystallization process of a substrate around a hole and for controlling its mechanical-thermal coupled damage self-repair comprises a CNC machine tool, a multi-channel current and voltage intelligent control device, an infrared temperature sensing device, an intelligent temperature-controlled tool, an electric brush, and a ceramic heating rod. The system functions to promptly and intelligently control and cool the area around the hole after drilling a hole in a thermoplastic composite material. The infrared temperature sensing device monitors the temperature around the hole in real time, providing feedback to assist the intelligent temperature-controlled tool in precise temperature control. The multi-channel current and voltage intelligent control device energizes the ceramic heating rod, which is then transferred to the intelligent temperature-controlled tool. This intelligent temperature-controlled tool intelligently controls the temperature during the post-drilling process, eliminates burrs, performs hole enlargement and finishing, and extrudes and smears the substrate around the hole under the drilling force and temperature of the intelligent temperature-controlled tool to self-repair. This effectively improves the crystallinity of the substrate, the rigidity of the substrate around the hole, and the load-bearing capacity around the hole. It also reduces the difficulty of drilling and finishing the hole, improving tool quality and tool life stability.

[0051] The present invention relates to a method for repairing peri-hole defects using thermoplastic resin adhesives. Thermosetting / thermoplastic composite materials are currently widely used in various fields due to their excellent performance. However, during the drilling process and product use, thermal, mechanical, and chemical corrosion factors inevitably cause peri-hole damage, such as cracking, delamination, and debonding. This degrades the overall structure and mechanical properties of the material, not only affecting its normal use but also increasing safety risks and maintenance costs. Therefore, timely repair of peri-hole defects after drilling or during product use is a practical and important issue.

[0052] To improve the quality of the perimeter of holes, eliminate safety hazards, enhance the strength of connecting holes, and extend their service life, a repair method for perimeter defects caused by drilling holes in thermosetting / thermoplastic composite materials, or perimeter defects generated during product service, using thermoplastic resin adhesive, is proposed based on the intelligent temperature-controlled tool developed in the previous article.

[0053] The working principle of the repair method for peri-hole defects using thermoplastic resin adhesives: Utilizing the heating and reshaping properties of thermoplastic resins, after drilling holes in the composite material, the degree and location of peri-hole defects are detected and located, and a thermoplastic resin adhesive (prepared according to the properties of the repair material) with high efficiency in repairing peri-hole defects is applied to the peri-hole defects. An intelligent temperature-controlled tool with the corresponding diameter and cutting toughness is selected according to the degree of damage around the hole and the hole diameter. After preheating to a certain temperature (lower than the operating temperature of the adhesive) in advance, the tool is inserted into the hole. The adhesive reaction is carried out according to the insulation and gradient cooling mode preset by the intelligent temperature-controlled box. At the same time, the CNC machine tool applies a certain drilling force for extrusion and coating. This not only provides the thermoplastic resin adhesive with the temperature required for heating, melting, reshaping, and physical and chemical reactions at the interface, but also enables the thermoplastic resin adhesive to be extruded and coated under the drilling force of the intelligent temperature-controlled tool, making the peri-hole defect repair reaction more complete. For example, it can increase the interface bonding strength and area under drilling force, fill cracks and delamination caused by damage around the hole, and reduce the occurrence of problems such as pores, bubbles, uneven adhesive distribution, and insufficient physical and chemical reactions inside the thermoplastic resin adhesive.

[0054] The repair method of thermoplastic resin adhesive for hole defects can solve the damage problems such as delamination, tearing, and debonding around the hole to a certain extent, improve the bearing capacity and structural mechanical properties of the connecting hole, improve the hole making quality and material service life, save material and labor production costs, and generate certain economic benefits.

[0055] In one embodiment, a system for repairing peri-hole defects with thermoplastic resin adhesive includes: a CNC machine tool, a thermoplastic resin adhesive (prepared), a multi-channel current and voltage intelligent control device, an infrared temperature sensing device, an intelligent temperature-controlled tool, a brush, and a ceramic heating rod. The infrared temperature sensing device monitors the peri-hole temperature in real time, providing feedback to assist the intelligent temperature-controlled tool in precise temperature control. The multi-channel current and voltage intelligent control device energizes the ceramic heating rod, which then transmits heat to the intelligent temperature-controlled tool. This allows the intelligent temperature-controlled tool to intelligently control the peri-hole temperature while simultaneously generating a certain drilling force under the control of the CNC machine tool, thereby extruding and smearing the thermoplastic resin adhesive to repair the peri-hole defect.

[0056] In one embodiment, after drilling holes in a composite material, the degree and position of defects around the holes are detected and located, and a thermoplastic resin adhesive (prepared according to the properties of the repair material) with high efficiency in repairing defects around the holes is applied to the defects around the holes. An intelligent temperature-controlled tool with corresponding diameter and cutting toughness is selected according to the degree of damage around the holes and the hole diameter. The tool is preheated to a certain temperature (lower than the operating temperature of the adhesive) in advance and then inserted into the hole. The adhesive is controlled to flow out from the side hole of the intelligent temperature-controlled tool under a predetermined pressure, and the adhesive reaction is carried out according to the preset insulation and gradient cooling modes of the intelligent temperature-controlled box. At the same time, the CNC machine tool applies a certain drilling force for extrusion and coating.

[0057] In one embodiment, during the extrusion and application of thermoplastic resin adhesive, the application pressure varies with tool temperature, tool speed, workpiece material, and workpiece structure. Therefore, a gluing control device or a gluing pressure control medium can be placed within the tool cavity. The gluing control device includes a pressure sensor, a temperature sensor, and a gluing control mechanism. The gluing control mechanism responds to at least one of the pressure sensor, the temperature sensor, and the tool speed controller to maintain the application of the thermoplastic resin adhesive at a predetermined pressure. Preferably, the gluing pressure control medium is compressed air.

[0058] In one embodiment, the gluing control mechanism responds to a combination of a pressure sensor, a temperature sensor, and a tool speed controller. Preferably, the tool speed controller sends a first pressure adjustment signal to the gluing control mechanism before the pressure sensor and / or the temperature sensor adjusts the tool speed. After the gluing control mechanism adjusts the gluing pressure based on the first pressure adjustment signal from the tool speed controller, the pressure sensor and / or the temperature sensor sends a second pressure adjustment signal to the gluing control mechanism to correct the gluing pressure.

[0059] Although the present invention is described herein with reference to specific embodiments, it should be understood that these embodiments are merely illustrative of the principles and applications of the invention. It should be understood that many modifications may be made to the illustrative embodiments, and that other arrangements may be devised, without departing from the spirit and scope of the invention as defined by the appended claims. It should be understood that the various dependent claims and features described herein may be combined in ways other than those described in the original claims. It should also be understood that features described in conjunction with individual embodiments may be employed in conjunction with other described embodiments.

Claims

1. A repair system for peri-hole defects - adhesive, characterized in that: The invention comprises a numerically controlled machine tool, a current or voltage control device, a temperature measurement system, a brush, a temperature control system, and a temperature-controlled tool. During machining on the numerically controlled machine tool, the current or voltage control device energizes the temperature control system, which is used to control the tool temperature. The temperature-controlled tool has a hollow structure inside, which houses a temperature control device. The hollow structure also houses an adhesive. A hole is provided on the side of the temperature-controlled tool for allowing the adhesive to flow out. The temperature control system is a ceramic heating rod, which is controlled by a current or voltage control device and can heat the thermoplastic matrix to the melting temperature and intelligently regulate the cooling process of the thermoplastic matrix to recrystallize the thermoplastic matrix; The output of the adhesive is controlled by a gluing device, and the gluing device responds to at least one of a temperature measuring system, a pressure detecting system and a tool speed control system.

2. The hole defect-adhesive repair system according to claim 1, characterized in that: The opening direction of the hollow structure is toward the tail of the temperature-controlled tool.

3. A self-repairing method for damage based on the peri-hole defect-adhesive repair system according to claim 1, characterized in that: The following steps are involved: Step S1, after drilling a hole in the composite material, detecting and locating the degree and position of defects around the hole; Step S2: Select an intelligent temperature-controlled tool with a corresponding diameter and cutting edge based on the degree of damage around the hole and the hole diameter, preheat it to a temperature lower than the operating temperature of the adhesive, and insert it into the hole before the defects around the hole recrystallize; Step S3, performing recrystallization of the peri-pore defects according to the preset heat preservation and gradient cooling modes of the intelligent temperature control box.

4. A self-repairing method for damage based on the peri-hole defect-adhesive repair system according to claim 1, characterized in that: The following steps are involved: Step S1, after drilling a hole in the composite material, detecting and locating the degree and position of defects around the hole; Step S2: Select an intelligent temperature-controlled tool with a corresponding diameter and cutting edge based on the degree of damage around the hole and the hole diameter, preheat it to a temperature lower than the operating temperature of the adhesive, and then insert it into the hole; Step S3, applying a thermoplastic resin adhesive having high efficiency in repairing peri-hole defects to the peri-hole defects; Step S4: The adhesive reaction is carried out according to the heat preservation and gradient cooling mode preset by the intelligent temperature control box, and at the same time, the CNC machine tool applies a certain drilling force for extrusion and coating.

5. The damage self-repair method according to claim 4, characterized in that: The glue coating control mechanism responds to a combination of a pressure sensor, a temperature sensor and a tool speed controller; while the tool speed controller adjusts the tool speed, it sends a first pressure adjustment signal to the glue coating control mechanism in advance of the pressure sensor and / or temperature sensor. After the glue coating control mechanism adjusts the glue coating pressure according to the first pressure adjustment signal of the tool speed controller, the pressure sensor and / or temperature sensor sends a second pressure adjustment signal to the glue coating control mechanism to correct the glue coating pressure.

6. A self-repairing method for damage based on the peri-hole defect-adhesive repair system according to claim 1, characterized in that: The following steps are involved: Step S1, after drilling a hole in the composite material, detecting and locating the degree and position of defects around the hole; Step S2, applying a thermoplastic resin adhesive having high efficiency in repairing peri-hole defects to the peri-hole defects; Step S3: Select an intelligent temperature-controlled tool with a corresponding diameter and cutting edge based on the degree of damage around the hole and the hole diameter, preheat it to a temperature lower than the operating temperature of the adhesive, and then insert it into the hole; Step S4: The adhesive reaction is carried out according to the heat preservation and gradient cooling mode preset by the intelligent temperature control box, and at the same time, the CNC machine tool applies a certain drilling force for extrusion and coating.

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