A Laser-Assisted Drilling Device for Composite Materials and Its Usage Method

Abstract

The present invention discloses a laser-assisted hole-making device for composite materials and a method for using the same, which includes a tool hole-making mechanism, a laser-assisted hole-making mechanism, and a composite material workpiece to be hole-made; the composite material workpiece is installed in the hole-making working area through a workpiece clamping mechanism, the laser-assisted hole-making mechanism is used for pre-drilling the composite material workpiece, and the tool hole-making mechanism is used for drilling the composite material workpiece. By combining traditional tool hole-making with laser hole-making, with laser hole-making as an auxiliary, the pre-drilled hole cuts the surface of the composite material, and then tool hole-making is carried out. To a certain extent, the resistance at the cutting edge of the composite material is reduced, the wear of the hole-making tool is alleviated, the occurrence frequency of interlayer tearing and burrs is reduced, while improving the hole-making quality, it is beneficial to the batch operation of hole-making, realizes on-line connection and automation on the production line, and has good practical value.

Description

Technical Field

[0001] The present invention relates to a laser-assisted hole-making device for composite materials and a method for using the same. Background Art

[0002] In the field of machining technology, various hole-making technologies have developed rapidly, and the corresponding hole-making requirements and levels have also become higher and higher. For example, in the aerospace field, the hole-making technology for aircraft curved skins directly determines the performance of the aircraft and shoulders the important responsibility of solving scientific research problems. At present, hole-making technologies mainly include mechanical hole-making and laser hole-making. Mechanical hole-making is a relatively traditional hole-making technology that uses a tool to punch holes. The laser hole-making process is a thermophysical process that uses the interaction between laser and matter to make holes. Since laser hole-making has a fast speed, high efficiency, simple requirements for workpiece clamping, easy to achieve on-line and automation in the production line, and can realize hole-making for inclined surfaces and complex-shaped parts, its application is becoming more and more extensive.

[0003] However, since the laser hole-making process is a thermophysical process that uses the interaction between laser and matter, it also has certain limitations. For example, when using the laser hole-making method to make holes in composite materials with fibers as the reinforcing material, the high temperature of the laser easily affects the performance of the composite material around the hole. And since the quality of laser hole-making is affected by parameters such as the energy of the laser pulse, pulse width, defocus amount, repetition frequency of the pulsed laser, and the properties of the processed material, the holes made often have a certain taper, especially for composite parts with a high thickness ratio, the taper is more obvious.

[0004] The requirements for hole-making in the aviation field are particularly high, including the requirement for the perpendicularity of the hole wall, and fiber composite materials are increasingly widely used in the aviation field. Therefore, at present, the hole-making for composite materials such as aircraft curved skins mostly still adopts the traditional mechanical hole-making method. However, most composite materials (such as carbon fiber materials) are difficult-to-machine materials, and the tool wears severely during the hole-making process. And it is easy to generate problems such as interlayer tearing and burrs during the hole-making process in the later stage of the tool life, which not only affects the performance of the composite material, but also directly affects the fatigue life, safety performance and other related performances of the aircraft.

[0005] Therefore, how to achieve high-efficiency and high-quality hole-making for composite materials has become a key problem that urgently needs to be solved in the production and manufacturing of composite parts. Summary of the Invention

[0006] In view of the above problems, the present invention provides a composite material laser-assisted hole-making device and its usage method. By combining the methods of laser hole-making and mechanical hole-making, the advantages of laser hole-making are utilized to cut the fiber layer on the surface of the composite material, reducing the resistance at the cutting edge of the composite material to a certain extent and decreasing the degree of tool damage. At the same time, since the surface fibers have been broken, the occurrence frequency of interlayer tearing and burrs is reduced. The specific technical solutions are as follows:

[0007] First of all, the present invention provides a composite material laser-assisted hole-making device, which includes a tool hole-making mechanism, a laser-assisted hole-making mechanism, and a composite material workpiece to be hole-made. The composite material workpiece is installed in the hole-making working area through a workpiece clamping mechanism. The laser-assisted hole-making mechanism is used to pre-drill the composite material workpiece, and the tool hole-making mechanism is used to make holes in the composite material workpiece.

[0008] For the above-mentioned composite material laser-assisted hole-making device, both the tool hole-making mechanism and the laser-assisted hole-making mechanism include industrial robots. The tool of the tool hole-making mechanism and the laser emitter of the laser-assisted hole-making mechanism are respectively installed at the end of the robotic arm of the industrial robot through robotic grippers, and the composite material workpiece is hole-made by controlling the industrial robot.

[0009] Preferably, for the above-mentioned composite material laser-assisted hole-making device, both the tool hole-making mechanism and the laser-assisted hole-making mechanism further include a vision recognition system for identifying the position of the composite material workpiece and detecting the processing quality of the hole-making. And the tool hole-making mechanism further includes a pressure sensor for real-time detecting the magnitude of the hole-making feed force.

[0010] For the above-mentioned composite material laser-assisted hole-making device, the workpiece clamping mechanism includes a clamping seat fixed in the hole-making working area and an AGV intelligent vehicle for transporting the composite material workpiece. The AGV intelligent vehicle is provided with a workpiece clamping tooling for clamping the composite material workpiece. The clamping seat is used to clamp and fix the AGV intelligent vehicle.

[0011] Preferably, for the above-mentioned composite material laser-assisted hole-making device, the workpiece clamping tooling includes a positioning stop block and a positioning groove. The composite material workpiece is erected on the AGV intelligent vehicle through the positioning stop block and the positioning groove and is locked and fixed by a C-type clamp. The tool hole-making mechanism and the laser-assisted hole-making mechanism are located on one side or both sides of the composite material workpiece.

[0012] Preferably, for the aforementioned composite material laser-assisted hole-making device, the clamping seat includes a supporting bottom rod and a clamping arm arranged at the upper end of the supporting bottom rod; the supporting bottom rod is fixed to the ground in the hole-making working area by bolts, and a motor is installed at its upper end; the clamping arm is located at the top of the supporting bottom rod and is installed in an inverted L shape with the supporting bottom rod, and it can rotate around the top of the supporting bottom rod driven by the motor, and the rotation angle is not less than 90°.

[0013] More preferably, for the aforementioned composite material laser-assisted hole-making device, there are four clamping seats, which are respectively arranged at both ends on both sides of the AGV intelligent vehicle; a clamping pad is also provided at the end of the clamping arm for clamping contact with the AGV intelligent vehicle.

[0014] Secondly, the present invention provides a method for using the aforementioned composite material laser-assisted hole-making device, including the following steps:

[0015] 1) Workpiece positioning: After cleaning the composite material workpiece to be processed, it is fixed on the AGV intelligent vehicle through the workpiece clamping tooling; drive the AGV intelligent vehicle to transport the composite material workpiece to the hole-making working area, start the clamping seat, fix the AGV intelligent vehicle, and wait for hole-making;

[0016] 2) Hole-making tool positioning: Start the tool hole-making mechanism and the laser-assisted hole-making mechanism, select a suitable hole-making tool for installation, and input predetermined laser processing parameters;

[0017] 3) Laser pre-drilling: Control the laser-assisted hole-making mechanism to perform pre-drilling. The movement trajectory of laser scanning is concentric with the hole to be drilled, and the diameter of the pre-drilled hole is 0.1 - 2 mm smaller than the diameter of the hole to be drilled, and the depth of the pre-drilled hole is 3 - 10 layer plies;

[0018] 4) Tool hole-making: Control the tool hole-making mechanism to perform cutting hole-making. The diameter of the hole made is equal to the diameter of the hole to be drilled, and the depth of the hole made is 10 - 64 layer plies;

[0019] 5) Hole-making method: When the thickness of the composite material workpiece ≤ 8 mm, the two-side simultaneous hole-making method is adopted; when the thickness of the composite material workpiece ≥ 8 mm, the same-side spaced hole-making method is adopted until it is drilled through or reaches the designed hole depth;

[0020] 6) Workpiece completion: Repeat steps 3), 4), and 5) to complete the required number of holes to be made, then start the clamping seat to release the AGV intelligent vehicle, and drive the AGV intelligent vehicle to transport the composite material workpiece with holes made out of the hole-making working area.

[0021] As a preferred technical solution, in the laser-assisted hole-making mechanism described in step 3), the laser generated by the laser emitter is any one of femtosecond laser, picosecond laser, nanosecond laser or millisecond laser; the wavelength of the laser is 300-1000 nm, the diameter of the focused spot is 12-20 μm, the power is 5-20 W, the pulse width is 8-12 picoseconds, the repetition frequency is 400-4000 kHz, and the scanning speed is 2000-5000 mm / s.

[0022] As a preferred technical solution, in the tool hole-making mechanism described in step 4), the feed rate of the tool cutting is 0.1-0.3 mm / r, and the magnitude of the cutting force is controlled to be 1-200 N.

[0023] Advantages of the present invention:

[0024] In the present invention, the traditional mechanical hole-making (tool hole-making) is combined with laser hole-making. With laser hole-making as an assistance, the pre-drilled hole cuts the surface of the composite material, and then tool hole-making is carried out. To a certain extent, the resistance at the exit of the composite material is reduced, the wear of the hole-making tool is alleviated, and the occurrence frequency of interlayer tearing and burrs is reduced.

[0025] The method of the present invention alternates laser hole-making and tool hole-making to solve the problem of ultra-thick ratio composite material parts. Moreover, the diameter of the laser pre-drilled hole is 0.1-2 mm smaller than the theoretical aperture of the hole to be drilled to prevent affecting the hole-making quality; and because the traditional tool hole-making is combined with laser hole-making, and the laser is only used for assisting hole-making, the power of laser hole-making is greatly reduced, which effectively controls the thermal radiation area of laser hole-making, gives full play to the advantage that laser processing hole-making has no contact with the product, and provides convenience for tool hole-making to ensure the hole-making quality.

[0026] The device of the present invention makes holes by means of an industrial robot and an AGV intelligent vehicle, realizes intelligent operation, improves the hole-making quality, is conducive to batch operation of hole-making, realizes online connection and automation on the production line, and has good practical value. Description of the drawings

[0027] Figure 1 It is a schematic structural diagram of the laser-assisted hole-making device for composite materials of the present invention;

[0028] Figure 2 It is a schematic structural diagram of the tool hole-making mechanism of the present invention;

[0029] Figure 3 It is a schematic structural diagram of the laser-assisted hole-making mechanism of the present invention;

[0030] Figure 4 It is a schematic structural diagram of the workpiece clamping mechanism of the present invention;

[0031] Figure 5Schematic structural diagram of the clamping seat of the present invention;

[0032] Figure 6 Schematic diagram of the running track of the laser pre-drilling holes of the present invention.

[0033] In the figure: 1. Tool hole-making mechanism; 101. Tool; 2. Laser-assisted hole-making mechanism; 201. Laser emitter; 3. Composite material workpiece; 4. Workpiece clamping mechanism; 41. Clamping seat; 411. Support bottom rod; 412. Clamping arm; 413. Clamping pad; 414. Motor; 42. AGV intelligent vehicle; 43. Workpiece clamping tooling; 431. Positioning stop block; 432. Positioning groove; 44. C-type clamp; 5. Hole-making working area; 6. Industrial robot; 601. Manipulator; 7. Robot gripper; 8. Visual recognition system; 9. Pressure sensor. Specific embodiments

[0034] Next, the technical solutions of the present invention will be clearly and completely described in conjunction with the embodiments and the accompanying drawings. Obviously, the described embodiments are only the preferred embodiments of the present invention, rather than all the embodiments, nor are they other forms of limitation to the present invention. Any person skilled in the art may make changes or modifications equivalent to the disclosed technical content. However, any simple modification, equivalent change, and modification made to the above embodiments based on the technical essence of the present invention without departing from the technical solution content of the present invention still fall within the protection scope of the technical solution of the present invention.

[0035] Embodiment 1

[0036] This embodiment is a composite material laser-assisted hole-making device and its usage method. The device, as Figures 1 to 6 shown, includes a tool hole-making mechanism 1, a laser-assisted hole-making mechanism 2, and a composite material workpiece 3 to be hole-made; the composite material workpiece 3 is installed in the hole-making working area 5 through the workpiece clamping mechanism 4, the laser-assisted hole-making mechanism 2 is used to pre-drill holes in the composite material workpiece 3, and the tool hole-making mechanism 1 is used to drill holes in the composite material workpiece 3; laser hole-making is used as an auxiliary, and its pre-drilled holes cut the surface of the composite material, and then tool hole-making is carried out, so as to combine traditional mechanical hole-making (tool hole-making) with laser hole-making, reducing the resistance at the cutting edge of the composite material to a certain extent, reducing the wear of the hole-making tool, and reducing the occurrence frequency of interlayer tearing and burrs.

[0037] The laser-assisted hole-making device for composite materials according to this embodiment, both the tool hole-making mechanism 1 and the laser-assisted hole-making mechanism 2 include an industrial robot 6. The tool 101 of the tool hole-making mechanism 1 and the laser emitter 201 of the laser-assisted hole-making mechanism 2 are respectively installed at the end of the robotic arm 601 of the industrial robot 6 through a robotic gripper 7, and the composite material workpiece 3 is hole-made by controlling the industrial robot 6. In addition, both the tool hole-making mechanism 1 and the laser-assisted hole-making mechanism 2 further include a vision recognition system 8 for identifying the position of the composite material workpiece 3 and detecting the processing quality of the hole-making, and the tool hole-making mechanism 1 further includes a pressure sensor 9 for real-time detecting the magnitude of the hole-making feed force.

[0038] In this embodiment, the workpiece clamping mechanism 4 includes a clamping seat 41 fixed in the hole-making working area 5 and an AGV intelligent vehicle 42 for transporting the composite material workpiece 3; a workpiece clamping tooling 43 is provided on the AGV intelligent vehicle 42, and the clamping seat 41 is used to clamp and fix the AGV intelligent vehicle 42. The workpiece clamping tooling 43 includes a positioning stop 431 and a positioning groove 432 for installing the composite material workpiece 3; the composite material workpiece 3 is erected on the AGV intelligent vehicle 42 through the positioning stop 431 and the positioning groove 432 and is locked and fixed by a C-type clamp 44. The clamping seat 41 includes a support bottom rod 411 and a clamping arm 412 provided at the upper end of the support bottom rod 411; the support bottom rod 411 is fixed to the ground of the hole-making working area 5 by bolts, and a motor 414 is installed at its upper end; the clamping arm 412 is provided at the top of the support bottom rod 411, is installed in an inverted L shape with the support bottom rod 411, and can rotate around the top of the support bottom rod 411 driven by the motor 414, and the rotation angle is not less than 90°, so as not to interfere with the outer contour of the AGV intelligent vehicle 42 and affect its transportation of the composite material workpiece 3. In this embodiment, there are four clamping seats 41, which are respectively arranged at both ends on both sides of the AGV intelligent vehicle 42 to clamp and fix the AGV intelligent vehicle 42; and a clamping cushion block 413 is provided at the end of the clamping arm 412 to increase the contact area with the AGV intelligent vehicle 42 during clamping to ensure stable clamping.

[0039] The using method of the laser-assisted hole-making device for composite materials according to this embodiment includes the following steps:

[0040] 1) Workpiece in place: After cleaning the composite material workpiece to be processed, fix it on the AGV intelligent vehicle through the workpiece clamping tooling; drive the AGV intelligent vehicle to transport the composite material workpiece to the hole-making working area, start the clamping seat, fix the AGV intelligent vehicle, and wait for hole-making.

[0041] 2) Positioning the hole-making tool: Start the tool hole-making mechanism and the laser-assisted hole-making mechanism, select a suitable hole-making tool for installation, and input the predetermined laser processing parameters. Among them, the laser generated by the laser emitter is any one of femtosecond laser, picosecond laser, nanosecond laser or millisecond laser. The wavelength of the laser is 300 - 1000 nm, the diameter of the focused spot is 12 - 20 μm, the power is 5 - 20 W, the pulse width is 8 - 12 picoseconds, the repetition frequency is 400 - 4000 kHz, and the scanning speed is 2000 - 5000 mm / s. The feed rate of the tool cutting is 0.1 - 0.3 mm / r, and the magnitude of the cutting force is controlled to be 1 - 200 N.

[0042] 3) Laser pre-drilling: Control the laser-assisted hole-making mechanism to perform pre-drilling. The movement trajectory of the laser scanning is concentric with the hole to be drilled, and the diameter of the pre-drilled hole is 0.1 - 2 mm smaller than the diameter of the hole to be drilled. The depth of the pre-drilled hole is 3 - 10 layer plies.

[0043] 4) Tool hole-making: Control the tool hole-making mechanism to perform cutting hole-making. The diameter of the hole made is equal to the diameter of the hole to be drilled, and the depth of the hole made is 10 - 64 layer plies.

[0044] 5) Hole-making method: The tool hole-making mechanism and the laser-assisted hole-making mechanism can perform cutting hole-making simultaneously or alternately. Alternate cutting is to first use laser hole-making to pre-cut 3 - 10 layer plies, and then use tool hole-making to cut the remaining plies. The cutting of the tool hole-making mechanism and the laser-assisted hole-making mechanism is also divided into same-side cutting and two-side cutting. In same-side cutting, the tool hole-making mechanism and the laser-assisted hole-making mechanism cut on the same side of the composite material part. The tool hole-making mechanism and the laser-assisted hole-making mechanism can be respectively installed at the ends of the robotic arms of two industrial robots for cutting, or the tool hole-making mechanism and the laser-assisted hole-making mechanism can be combined and installed at the end of the robotic arm of one industrial robot to perform hole-making cutting simultaneously. In two-side cutting, the tool hole-making mechanism and the laser-assisted hole-making mechanism cut on both sides of the composite material part, that is, they are respectively installed at the ends of the robotic arms of two industrial robots. For both same-side cutting and two-side cutting, simultaneous cutting or alternate cutting can be used. Generally, when the thickness of the composite material part ≤ 8 mm, the positions and timings of the tool hole-making mechanism and the laser-assisted hole-making mechanism can be set arbitrarily. It is preferably to perform cutting hole-making simultaneously on both sides of the tool and the laser. When the thickness of the composite material part ≥ 8 mm or when it is not drilled through, it is preferably to perform alternate hole-making on the same side of the tool and the laser until the required hole depth is reached or it is drilled through.

[0045] 6) Completion of the part: Repeat steps 3), 4), and 5) to complete the required number of holes, then start the clamping seat to release the AGV intelligent vehicle, and drive the AGV intelligent vehicle to transport the composite material part with holes made out of the hole-making working area.

[0046] Application Case 1:

[0047] In this embodiment, the laser-assisted hole-making device for composite materials described in Embodiment 1 is used to make holes in a certain carbon fiber composite material plate. The thickness of this carbon fiber composite material plate is 5 mm (paved by 40 layers of 0.125 mm fabric prepreg), and 200 standard holes need to be made. The diameter of the standard hole to be made is 6 mm. The specific hole-making process is as follows:

[0048] Clean the surface of the carbon fiber composite material plate, dry it with a wiping cloth, and fix it on the AGV intelligent vehicle 42 and lock it with a C-clamp. Drive the AGV vehicle to transport the composite material plate to the hole-making working area 5, and start the clamping seat 41 to fix the AGV intelligent vehicle 42 for processing. The tool hole-making mechanism 1 and the laser-assisted hole-making mechanism 2 are located on both sides of the carbon fiber composite material plate. Select a cemented carbide tool with a diameter of 6 mm and install it on the robot gripper of the tool hole-making mechanism 1; set the parameters of the laser-assisted hole-making mechanism 2: select a picosecond laser, set the laser wavelength to 1064 nm, the focused spot diameter to 15 μm, the laser power to 5 - 20 W, the pulse width of the picosecond laser to 8 - 12 picoseconds, and the laser repetition frequency to 1000 kHz.

[0049] First, start the laser-assisted hole-making mechanism 2. The laser scanning trajectory is a circle concentric with the diameter of the hole to be made, with a diameter of 5.5 mm, a scanning speed of 2500 mm / s, 3 processing times, and a cutting depth of 3 layers of plies; at the same time, start the tool hole-making mechanism 1. The movement trajectory of the tool for hole-making is concentric with the diameter of the hole to be made, with a diameter of 6 mm. Control the tool feed rate to 0.5 mm / s and the tool rotation speed to 10000 rpm, and directly make the hole.

[0050] Repeat the operations of the laser-assisted hole-making mechanism 2 and the tool hole-making mechanism 1 until 200 standard holes are prepared. Finally, the AGV intelligent vehicle 42 transports the carbon fiber composite material plate with holes made to the storage place.

[0051] Application Case 2:

[0052] In this embodiment, the laser-assisted hole-making device for composite materials described in Embodiment 1 is used to make holes in a certain carbon fiber composite curved panel with a thickness of 20 mm (paved by 80 layers of 0.125 mm fabric prepreg), and 10 standard holes need to be made. The diameter of the standard hole to be made is 5 mm. The specific hole-making process is as follows:

[0053] Clean the surface of the curved panel, dry it with a wiping cloth, and fix it on the AGV intelligent vehicle 42, and lock it with a C-clamp. Drive the AGV vehicle to transport the sheet to the drilling working area 5, start the clamping seat 41, and fix the AGV intelligent vehicle 42 for processing. The tool drilling mechanism 1 and the laser-assisted drilling mechanism 2 are located on the same side of the carbon fiber composite curved panel. Select a cubic boron carbide tool with a diameter of 5 mm and install it on the robot gripper of the tool drilling mechanism 1. Set the parameters of the laser-assisted drilling mechanism 2 to select a picosecond laser. The laser wavelength is set to 1064 nm, the focused spot diameter is 20 μm, the laser power is 20 W, the pulse width of the picosecond laser is 8 - 12 picoseconds, and the laser repetition frequency is 4000 kHz.

[0054] First, start the laser-assisted drilling mechanism 2. The laser scanning speed is 5000 mm / s, and the scanning trajectory is a circle concentric with the diameter of the hole to be drilled, with a diameter of 2.5 mm. Process it once first, and the cutting depth is 3 layers of plies; then start the tool drilling mechanism 1. The movement trajectory of the tool drilling is concentric with the diameter of the hole to be drilled, with a diameter of 5 mm. Control the tool feed rate to 0.1 mm / s, the tool rotation speed to 5000 rpm, and the cutting depth to 37 layers of plies; then make the laser-assisted drilling mechanism 2 cut 3 layers of plies again, and then start the tool drilling mechanism 1 again to cut the remaining 37 layers of plies to complete the drilling.

[0055] Repeat the above operations to complete the preparation of 10 standard parts holes. Finally, the AGV intelligent vehicle 42 transports the drilled carbon fiber composite curved panel to the storage place.

[0056] For those skilled in the art, it is obvious that the present invention is not limited to the details of the above exemplary embodiments, and without departing from the spirit or basic characteristics of the present invention, the present invention can be implemented in other specific forms. Therefore, in any aspect, the embodiments should be regarded as exemplary and non-limiting. The scope of the present invention is defined by the appended claims rather than the above description. Therefore, all changes falling within the meaning and scope of the same elements of the claims are intended to be included in the present invention. Any reference signs in the claims should not be regarded as limiting the claimed rights.

[0057] In addition, it should be understood that although this specification is described according to embodiments, not every embodiment only contains an independent technical solution. This narrative way of the specification is only for clarity. Those skilled in the art should regard the specification as a whole. The technical solutions in the embodiments can also be appropriately combined to form other embodiments that can be understood by those skilled in the art.

Claims

1. A method for using a laser-assisted hole-making device for composite materials, characterized in that: The hole-making device includes a tool hole-making mechanism, a laser-assisted hole-making mechanism, and a composite material workpiece to be hole-made; the composite material workpiece is installed in the hole-making working area through a workpiece clamping mechanism, the laser-assisted hole-making mechanism is used to pre-drill the composite material workpiece, and the tool hole-making mechanism is used to drill the composite material workpiece; The workpiece clamping mechanism includes a clamping seat fixed in the hole-making working area and an AGV intelligent vehicle for transporting the composite material workpiece; a workpiece clamping tool for clamping the composite material workpiece is provided on the AGV intelligent vehicle; the clamping seat is used to clamp and fix the AGV intelligent vehicle; The method for using this hole-making device includes the following steps: 1) Workpiece positioning: After cleaning the composite material workpiece to be processed, fix it on the AGV intelligent vehicle through the workpiece clamping tool; drive the AGV intelligent vehicle to transport the composite material workpiece to the hole-making working area, start the clamping seat, fix the AGV intelligent vehicle, and wait for hole-making; 2) Hole-making tool positioning: Start the tool hole-making mechanism and the laser-assisted hole-making mechanism, select a suitable hole-making tool for installation, and input predetermined laser processing parameters; 3) Laser pre-drilling: Control the laser-assisted hole-making mechanism to perform pre-drilling. The movement trajectory of the laser scanning is concentric with the hole to be made, and the diameter of the pre-drilled hole is 0.1 - 2 mm smaller than the diameter of the hole to be made, and the depth of the pre-drilled hole is 3 - 10 layer plies; 4) Tool hole-making: Control the tool hole-making mechanism to perform cutting hole-making. The diameter of the hole made is equal to the diameter of the hole to be made, and the depth of the hole made is 10 - 64 layer plies; 5) Hole-making method: When the thickness of the composite material workpiece ≤ 8 mm, the two-side simultaneous hole-making method is adopted; when the thickness of the composite material workpiece ≥ 8 mm, the same-side spaced hole-making method is adopted until it is drilled through or reaches the designed hole depth; 6) Workpiece completion: Repeat steps 3), 4), and 5) to complete the required number of holes, then start the clamping seat to release the AGV intelligent vehicle, and drive the AGV intelligent vehicle to transport the hole-made composite material workpiece out of the hole-making working area.

2. The method for using a laser-assisted hole-making device for composite materials according to claim 1, characterized in that: Both the tool hole-making mechanism and the laser-assisted hole-making mechanism include industrial robots. The tool of the tool hole-making mechanism and the laser emitter of the laser-assisted hole-making mechanism are both installed at the end of the robotic arm of the industrial robot through robotic grippers, and the composite material workpiece is hole-made by controlling the industrial robot.

3. The method for using a laser-assisted hole-making device for composite materials according to claim 2, characterized in that: Both the tool hole-making mechanism and the laser-assisted hole-making mechanism also include a vision recognition system for identifying the position of the composite material workpiece and detecting the processing quality of the hole-making; and the tool hole-making mechanism also includes a pressure sensor for real-time detecting the magnitude of the hole-making feed force.

4. The method for using a laser-assisted hole-making device for composite materials according to claim 1, characterized in that: The workpiece clamping tooling includes a positioning stop block and a positioning groove; the composite material workpiece is erected on the AGV intelligent trolley through the positioning stop block and the positioning groove, and is locked and fixed by a C-shaped clamp; the tool hole-making mechanism and the laser-assisted hole-making mechanism are located on one side or both sides of the composite material workpiece.

5. The usage method of the composite material laser-assisted hole-making device according to claim 1, characterized in that: the clamping seat includes a supporting bottom rod and a clamping arm arranged at the upper end of the supporting bottom rod; the supporting bottom rod is fixed on the ground of the hole-making working area by bolts, and a motor is installed at its upper end; the clamping arm is located at the top of the supporting bottom rod and is installed in an inverted L shape with the supporting bottom rod, and can rotate around the top of the supporting bottom rod under the drive of the motor, and the rotation angle is not less than 90°.

6. The usage method of the composite material laser-assisted hole-making device according to claim 5, characterized in that: there are four clamping seats, which are respectively arranged at both ends on both sides of the AGV intelligent trolley; a clamping cushion block is further arranged at the end of the clamping arm for clamping and contacting with the AGV intelligent trolley.

7. The usage method of the composite material laser-assisted hole-making device according to claim 1, characterized in that: for the laser-assisted hole-making mechanism described in step 3), the laser wavelength generated by the laser emitter is 300 - 1000 nm, the focused spot diameter is 12 - 20 μm, the power is 5 - 20 W, the pulse width is 8 - 12 picoseconds, the repetition frequency is 400 - 4000 kHz, and the scanning speed is 2000 - 5000 mm / s.

8. The usage method of the composite material laser-assisted hole-making device according to claim 1, characterized in that: for the tool hole-making mechanism described in step 4), the feed rate of the tool cutting is 0.1 - 0.3 mm / r, and the magnitude of the cutting force is 1 - 200 N.

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