A laser cutting device for carbon fiber composites

Abstract

This invention relates to the field of laser cutting technology, specifically a laser cutting device for carbon fiber composite materials. The device includes a mounting frame, a mounting plate, and a carbon fiber composite plate. A laser head is mounted on the mounting plate, which also houses a glue-injection assembly. This assembly includes a glue-injection tube, a scraper, and an illumination lamp. The glue-injection tube has a dual-cavity housing at its injection port. The housing is divided into a first cavity and a second cavity by a light-blocking structure. A mold is located in the first cavity, and the illumination lamp is located in the second cavity. The light-blocking structure blocks light from entering the first cavity to prevent premature curing of the protective adhesive. The second cavity has a focusing structure to concentrate the light emitted from the illumination lamp onto the adhesive surface, improving curing efficiency. This invention integrates glue injection, scraping, curing, and cutting into one unit. Through the combined light-blocking and focusing of the dual-cavity housing, it effectively prevents premature curing of the protective adhesive and improves curing efficiency, while also suppressing the expansion of the heat-affected zone.

Description

Technical Field

[0001] This invention relates to the field of laser cutting technology, specifically to a laser cutting device for carbon fiber composite materials. Background Technology

[0002] Carbon fiber composites are anisotropic composite materials with carbon fiber as the reinforcement and resin matrix as the binder. They possess many excellent properties such as high specific strength, high specific modulus, light weight, corrosion resistance, fatigue resistance, and high temperature resistance. Compared with traditional metal materials, they have significant advantages in comprehensive performance and are now widely used in high-end manufacturing fields such as aerospace, new energy vehicles, wind power equipment, low-altitude aircraft, and precision electronics. They are the core key materials for lightweight and high-performance equipment manufacturing, and the market application scale and processing demand continue to expand.

[0003] To suppress the expansion of the heat-affected zone, two auxiliary solutions have emerged in existing technologies: water-assisted cooling and surface coating with a liquid layer. Water cooling (such as CN105689900A) cools the lower surface of the sheet by positioning carbon fiber material in cooling water; however, it only affects the lower surface and lacks effective protection for the upper surface directly affected by the laser. While surface coating with a liquid layer (such as silicone oil) can provide some protection to the upper surface, the liquid layer does not solidify and is prone to flowing and splashing during cutting, resulting in unstable protective effects. Furthermore, coating and cutting are usually performed separately, requiring the transfer of workpieces between different workstations, leading to low processing efficiency.

[0004] Furthermore, in solutions where coating and curing are integrated into the same station, the light from the UV curing lamp can easily enter the mold through the side opening, causing the protective adhesive inside the mold to cure prematurely, resulting in adhesive blockage or deterioration of adhesive performance. At the same time, the gap between the scraper and the board in existing adhesive injection and leveling devices is usually fixed, making it impossible to flexibly adjust the coating thickness according to different board thicknesses, different laser process parameters, or different types of protective adhesives, thus limiting the applicability of the equipment. Summary of the Invention

[0005] To address the problems in the prior art, the present invention provides a laser cutting device for carbon fiber composite materials.

[0006] The technical solution adopted by this invention to solve its technical problem is: a laser cutting device for carbon fiber composite materials, including a fixing frame, a mounting plate, and a carbon fiber composite plate. The upper end of the fixing frame has a through groove, and a fixing shell is fixedly connected to the outer side of the upper opening of the through groove. A laser head is fixedly connected to one side of the mounting plate. A first hydraulic cylinder is fixedly connected to the lower end of the fixing frame via a base plate. The device also includes: An extrusion assembly, which is installed on the upper end of the fixed frame, is used to press the carbon fiber composite plate onto the pallet to ensure stability during cutting; The glue injection assembly is installed on the other side of the mounting plate, and the glue injection assembly includes a glue injection tube, a scraper and an illumination lamp; The housing is disposed at the glue inlet of the glue injection tube. The housing has a light-blocking structure that divides the interior of the housing into a first cavity and a second cavity. The glue outlet of the glue injection tube is connected to a mold. The mold is disposed in the first cavity. The irradiation lamp is disposed in the second cavity. The light-blocking structure is used to block light from entering the first cavity from the second cavity. The second cavity has a light-focusing structure for focusing the light emitted by the irradiation lamp onto the surface of the glue layer. The scraper is located at the glue outlet of the mold, and the scraper is connected to a lifting drive mechanism to drive the scraper to move up and down to control the glue coating thickness. The glue injection tube, scraper, irradiation lamp and laser head are arranged in sequence along the moving direction of the mounting plate, so that when the mounting plate moves in a single movement along the preset direction, the four processes of glue injection, scraping, curing and laser cutting are completed sequentially and continuously. A dust collection assembly, mounted on one side of the mounting plate, is used to limit the movement space of debris raised during cutting and to collect it, preventing it from adhering to the protective adhesive. A water storage tank is fixedly connected to the end of the piston rod of the first hydraulic cylinder. The water storage tank stores water and has two working states: the first working state is a cooling state, in which the lower surface of the carbon fiber composite board is in contact with the water surface, used to cool the lower surface of the board during the cutting process; the second working state is a de-adhesive state, in which the water storage tank rises to immerse the entire carbon fiber composite board in water, used to hydrolyze and peel off the protective adhesive on the upper surface.

[0007] Specifically, the light-blocking structure is a light-blocking plate, which is fixedly connected between the first cavity and the second cavity. The bottom of the first cavity is provided with a through hole for the colloid to pass through, and the inner wall of the second cavity is a highly reflective surface.

[0008] Specifically, the inner wall of the second cavity is a parabolic or semi-circular arc-shaped highly reflective surface, and the illumination lamp is positioned at the focal point or on the optical axis of the second cavity.

[0009] Specifically, a vertical sliding guide structure is provided between the scraper and the mold. The scraper slides up and down along the vertical sliding guide structure to change the gap between the lower end of the scraper and the upper surface of the carbon fiber composite board, thereby controlling the coating thickness.

[0010] Specifically, the vertical sliding guide structure is a vertical groove formed on the upper inner wall of the mold outlet, and the upper end of the scraper is slidably connected in the vertical groove.

[0011] Specifically, the lifting drive mechanism is a miniature servo electric cylinder. The cylinder body of the miniature servo electric cylinder is fixedly connected to the upper end of the housing. The telescopic end of the miniature servo electric cylinder is fixedly connected to the scraper. The miniature servo electric cylinder is electrically connected to the controller.

[0012] Specifically, the miniature servo electric cylinder is a split-type miniature servo electric cylinder.

[0013] Specifically, the movement trajectory of the mounting plate simultaneously constitutes the glue injection path and the laser cutting path. The scraper follows the glue injection tube to smooth the glue layer, and the irradiation lamp follows the scraper to irradiate and cure the smoothed glue layer, forming a solid protective layer on the upper surface of the carbon fiber composite board. The laser head finally reaches and passes through the solid protective layer to perform laser cutting on the carbon fiber composite board. The solid protective layer acts as a thermal isolation barrier during the laser cutting process, preventing the laser heat from diffusing to the upper surface of the carbon fiber composite board. The water in the water tank and the solid protective layer together form a double-layer thermal barrier structure with the upper solid protective layer providing heat insulation and the lower surface providing water cooling for heat dissipation, which is used to synergistically suppress the expansion of the heat-affected zone during laser cutting.

[0014] The beneficial effects of this invention are: (1) In this invention, the glue injection tube, scraper, irradiation lamp and laser head are arranged in sequence along the moving direction of the mounting plate, so that the mounting plate completes the four processes of glue injection, scraping, curing and laser cutting in sequence during a single movement. The above four processes do not work independently, but are closely coupled in time and space and support each other in function. Glue injection is the prerequisite for scraping, scraping is the prerequisite for curing, and the solid protective layer formed by curing is the prerequisite for high-quality laser cutting. Each step is a necessary condition for the next step. They are interlocked. The glue injection path and the cutting path naturally coincide, and there is no need for inter-process transfer and secondary positioning, which improves the processing efficiency and the consistency of the protective layer quality.

[0015] (2) This invention integrates the mold and the irradiation lamp into two independent cavities of the shell by setting a dual-cavity shell. The light-blocking structure effectively blocks the propagation of ultraviolet light into the mold cavity, preventing the protective glue from curing prematurely in the mold. At the same time, the focusing structure of the second cavity focuses the ultraviolet light emitted by the irradiation lamp onto the surface of the glue layer, improving the curing efficiency and curing depth. The two functions of light blocking and light focusing are achieved synergistically through the integrated shell - light blocking ensures the reliability of the glue injection process, and light focusing ensures the efficiency of the curing process. Together, they enable "glue injection-curing" to be completed continuously at a very close distance, providing a reliable solid protective layer for subsequent laser cutting. In the prior art, the light shield and the reflector are two independent components set in different positions. The dual-cavity shell of this invention integrates the two into one, solving the problem of interference between glue injection and curing operations at close range.

[0016] (3) By setting up a scraper lifting adjustment system driven by a lifting drive mechanism, the operator can accurately control the gap between the lower end of the scraper and the upper surface of the board according to the different thicknesses of carbon fiber composite boards, different laser process parameters or different types of protective adhesives, thereby flexibly setting the coating thickness and realizing the leap from "dedicated machine for dedicated use" to "multi-condition adaptive".

[0017] (4) In this invention, the water in the water tank and the solid protective layer on the upper surface together constitute a double-layer heat barrier structure of "adhesive on top and water on the bottom". In this structure, the solid protective layer on the upper surface and the water cooling on the lower surface do not work independently, but are functionally interdependent. The solid protective layer blocks the laser heat from spreading to the upper surface of the board, preventing heat from accumulating on the upper surface; the water cooling on the lower surface continuously removes heat from the bottom of the board, preventing heat from spreading upward from the lower surface. The two work simultaneously from both directions to control the heat-affected zone to a minimum. Without either one, the technical effect of suppressing the heat-affected zone of this invention cannot be achieved. At the same time, the water tank also has a dual function: water cooling to dissipate heat from the lower surface of the board during the cutting process, and rising to immerse the board as a whole in water after the cutting is completed, so that the protective adhesive is peeled off as a whole through hydrolysis reaction. There is no need to add additional adhesive removal equipment or cleaning tank, which simplifies the equipment structure and cleaning process.

[0018] (5) The dust collection component of the present invention isolates the cutting area from the external environment through the baffle, and forms a negative pressure in the cutting area in conjunction with the air box and the suction fan, so as to collect the debris generated during cutting in time, avoid the debris from adhering to the surface of the protective glue and interfering with subsequent laser cutting, and improve the cleanliness of the working environment.

[0019] (6) In this invention, the shell, scraper lifting and adjusting system, four-process sequential integrated structure and water tank together constitute a complete intelligent processing system of "online protective layer formation - precise thickness control - instant curing - double-sided thermal management - laser cutting". Among them: the dual-cavity shell solves the optical management problem of "no light leakage and curing"; the scraper lifting and adjusting system solves the thickness adaptation problem of "how thick to coat"; the four-process sequential integration solves the process connection problem of "how to operate continuously"; and the glue application and water application solves the thermal management problem of "how to comprehensively suppress the heat-affected zone". Attached Figure Description

[0020] The present invention will be further described below with reference to the accompanying drawings and embodiments.

[0021] Figure 1 This is a schematic diagram of the structure of the present invention; Figure 2 This is a cross-sectional view of the present invention; Figure 3 for Figure 2 Region map at point A; Figure 4This is a schematic diagram of the structure when the carbon fiber composite plate of the present invention is fixed; Figure 5 This is a schematic diagram of the dust collection component structure of the present invention.

[0022] In the diagram: 1. Fixing frame; 2. Through slot; 3. Fixing shell; 4. Motor; 5. Screw; 6. Threaded block; 7. Robotic arm; 8. Mounting plate; 9. Glue injection tube; 10. Cylinder; 11. Piston; 12. Mold; 13. Scraper; 14. Irradiation lamp; 15. Laser head; 16. Protective tube; 17. Baffle; 18. Suction pipe; 19. Elastic rope; 20. Air box; 21. Suction fan; 22. Filter screen; 23. Support plate; 24. Carbon fiber composite plate; 25. Base plate; 26. First hydraulic cylinder; 27. Water storage tank; 28. Second hydraulic cylinder; 29. ​​Top frame; 30. Lifting rod; 31. Pressure plate; 32. Shell; 33. Miniature servo electric cylinder. Detailed Implementation

[0023] To make the technical means, creative features, objectives and effects of this invention easier to understand, the invention will be further described below in conjunction with specific embodiments.

[0024] like Figures 1-5 As shown, the present invention provides the following technical solution: Example 1: A laser cutting device for carbon fiber composite materials includes a fixed frame 1, a mounting plate 8, and a carbon fiber composite plate 24. The upper end of the fixed frame 1 has a through groove 2, and a fixed shell 3 is fixedly connected to the outer side of the upper opening of the through groove 2. A laser head 15 is fixedly connected to one side of the mounting plate 8. The lower end of the interior of the fixed frame 1 is fixedly connected to a first hydraulic cylinder 26 through a base plate 25. The carbon fiber composite plate 24 is installed at the lower end of the interior of the fixed frame 1 through two support plates 23. The two support plates 23 are symmetrically fixedly connected to the lower end of the interior of the fixed frame 1. Both support plates 23 have a Z-shaped structure. The carbon fiber composite plate 24 is disposed between the lower ends of the two support plates 23. A robotic arm 7 is mounted on the inner side of the fixed housing 3 via a drive assembly. A mounting plate 8 is fixedly connected to the end of the robotic arm 7. The drive assembly includes a motor 4, which is fixedly connected to the side wall of the fixed housing 3. A screw 5 is fixedly connected to the output end of the motor 4. The screw 5 is rotatably connected to the middle of the inner side of the fixed housing 3. A threaded block 6 is threadedly connected to the middle of the screw 5. The robotic arm 7 is fixedly connected to the lower end of the threaded block 6.

[0025] In use, the carbon fiber composite plate 24 is placed between two sets of Z-shaped support plates 23 to complete the basic support and positioning. The motor 4 is started to drive the screw 5 to rotate, which drives the threaded block 6 to move laterally along the screw 5. The mechanical arm 7 connected to the lower end of the threaded block 6 synchronously drives the mounting plate 8 and the laser head 15 to move. The laser head 15 is fed laterally by the drive assembly composed of the motor 4, screw 5 and threaded block 6, so that the basic laser cutting operation can be carried out on the carbon fiber composite plate 24. The fixed frame 1 and the base plate 25 provide load-bearing support for the entire equipment.

[0026] Example 2: The technical solution that differs from Example 1 in this example includes: an extrusion assembly installed on the upper end of the fixing frame 1, which is used to press the carbon fiber composite plate 24 onto the support plate 23 to ensure stability during cutting; The extrusion assembly includes a second hydraulic cylinder 28, which is fixedly connected to the upper middle part of the fixed shell 3. The piston rod end of the second hydraulic cylinder 28 is fixedly connected to a top frame 29. At each of the four corners of the top frame 29, a pressure plate 31 is fixedly connected via a lifting rod 30. The lifting rod 30 is movably connected to the upper end of the fixed frame 1. The lower end of the pressure plate 31 abuts against the upper end of the carbon fiber composite plate 24.

[0027] In use, an extrusion assembly is added to assist in positioning based on Embodiment 1. After the carbon fiber composite plate 24 is placed on the support plate 23, the second hydraulic cylinder 28 is activated to push the top frame 29 downward. The lifting rods 30 connected at the four corners of the top frame 29 simultaneously drive the pressure plate 31 to press down. The lower end of the pressure plate 31 presses against the upper surface of the carbon fiber composite plate 24, firmly fixing the plate on the support plate 23, eliminating the problem of plate displacement and shaking during the cutting process, and stably completing the laser cutting process. The fixed shell 3 is used to support the second hydraulic cylinder 28.

[0028] Example 3: The technical solution of this example, which differs from that of Example 2, includes a dust collection component and an adhesive injection component installed on the mounting plate 8. The dust collection component is installed on one side of the mounting plate 8 to limit the movement space of debris raised during cutting and to collect it, so as to prevent it from adhering to the protective adhesive. The dust collection assembly includes a protective tube 16, which is fixedly connected to the lower end of one side of the mounting plate 8 and sleeved on the lower outer side of the laser head 15. The lower end of the protective tube 16 is fixedly connected to a baffle 17, which is fixedly connected to a blower box 20 through a suction pipe 18. One end of the suction pipe 18 connected to the blower box 20 extends to the outside of the mounting frame 1. The middle part of the suction pipe 18 is fixedly connected to the upper end of the mounting frame 1 through an elastic rope 19. The blower box 20 is fixedly connected to the outer wall of the mounting frame 1. Holes are opened on the side wall of the blower box 20. A suction fan 21 is fixedly connected to the side of the hole facing outward, and a filter screen 22 is threadedly connected to the side facing inward. The lower end of the blower box 20 has a funnel-shaped structure, and a sealing plug is threadedly connected through the middle of the lower end. The glue injection assembly is located on the other side of the mounting plate 8. The glue injection assembly includes a glue injection tube 9, a scraper 13, and an illumination lamp 14. The housing 32 is bolted to the injection port of the injection tube 9. The housing 32 is made of an opaque metal material (such as aluminum alloy) and is formed using a one-piece die-casting process. During die-casting, the first cavity, the second cavity, and the light-blocking structure are directly formed through the mold cavity. After die-casting, the inner wall of the second cavity is CNC precision machined to form a parabolic or semi-circular arc-shaped high-reflectivity surface, which is then polished to achieve the required reflectivity. The light-blocking structure formed inside the housing 32 divides the interior of the housing 32 into sections along the moving direction of the mounting plate 8. The first and second cavities are arranged in sequence. The outlet of the glue injection tube 9 is connected to the mold 12. The mold 12 is set in the first cavity. The mold 12 is fixedly connected to the first cavity of the housing 32 by bolts. The irradiation lamp 14 is set in the second cavity. The irradiation lamp 14 is fixedly installed on the inner wall of the second cavity by the lamp holder. The light-blocking structure is used to block the light in the second cavity from entering the first cavity to prevent the protective glue in the mold 12 from being cured prematurely. The second cavity has a light-concentrating structure to focus the light emitted by the irradiation lamp 14 onto the surface of the glue layer. The mold 12 has an opening at the bottom and one side. The bottom of the first cavity is provided with a through hole for the glue to pass through, corresponding to the glue outlet of the mold 12. The ultraviolet light emitted by the irradiation lamp 14 is reflected by the high reflective surface and converges on the glue surface outside the first cavity and behind the scraper 13. The scraper 13 is set at the side opening of the mold 12. A vertical sliding guide structure is provided between the scraper 13 and the mold 12. The scraper 13 can slide up and down along the vertical sliding guide structure to change the gap between the lower end of the scraper 13 and the upper surface of the carbon fiber composite plate 24, thereby controlling the coating thickness. A miniature servo cylinder 33 is provided between the scraper 13 and the housing 32. The cylinder body of the miniature servo cylinder 33 is fixedly connected to the outer wall of the housing 32 by bolts. The telescopic end of the miniature servo cylinder 33 passes through the wall of the housing 32 and extends into the first cavity, and is fixedly connected to the upper end of the scraper 13. The telescopic end of the miniature servo cylinder 33 is fixedly connected to the scraper 13. The miniature servo cylinder 33 is electrically connected to the controller. The controller controls the extension and retraction of the miniature servo cylinder 33 to drive the scraper 13 to slide up and down along the vertical sliding guide structure. The dispensing tube 9, scraper 13, illumination lamp 14 and laser head 15 are arranged sequentially along the moving direction of the mounting plate 8, so that when the mounting plate 8 moves in a single step along the preset direction, it can sequentially and continuously complete the four processes of dispensing, smoothing, curing and laser cutting.

[0029] In use, after the sheet material is pressed and fixed by the extrusion assembly, the target adhesive thickness is first set by the controller. The controller controls the micro servo cylinder 33 to adjust the scraper 13 to the corresponding height. The cylinder 10 is activated to push the piston 11 down to press the protective adhesive inside the glue tube 9. The adhesive falls onto the upper end of the carbon fiber composite plate 24 and is constrained by the mold 12. When the mounting plate 8 moves along the preset direction, it will form a strip of adhesive on the carbon fiber composite plate 24. During this process, the scraper 13 will scrape the upper surface of the adhesive, and a layer of UV peelable protective adhesive will be evenly coated on the surface of the carbon fiber composite plate 24. The irradiation lamp 14 quickly... The laser penetrates the cured protective adhesive layer to cut the carbon fiber composite plate 24. At the same time, the suction fan 21 is activated, and the airflow is delivered to the baffle 17 through the air box 20 and the suction pipe 18. The baffle 17, together with the protective tube 16 fitted on the outside of the laser head 15, seals the cutting area. The debris generated by cutting is sucked into the air box 20 by negative pressure. The filter screen 22 intercepts dust, and the bottom sealing plug of the funnel-shaped air box 20 can be cleaned of accumulated dust periodically. The suction pipe 18 is pulled by the elastic rope 19 to adapt to the movement stroke of the robotic arm 7. The baffle 17 can prevent debris from adhering to the surface of the protective adhesive and ensure that subsequent laser cutting is not interfered with.

[0030] Example 4: The technical solution of this example, which differs from that of Example 3, includes: a water storage tank 27 installed at the end of the piston rod of the first hydraulic cylinder 26. The water storage tank 27 stores water and has two working states: The first working state is the cooling state, where the lower surface of the carbon fiber composite plate 24 is in contact with the water surface to cool the lower surface of the plate during the cutting process. The second working state is the adhesive removal state, in which the water tank 27 rises to immerse the carbon fiber composite plate 24 entirely in water, so as to hydrolyze and peel off the protective adhesive on the upper surface.

[0031] In use, after completing the gluing, dust removal, and sheet pressing processes in Example 3, the first hydraulic cylinder 26 above the base plate 25 is activated to lift the water tank 27 upwards, so that the water in the water tank 27 is in full contact with the lower surface of the carbon fiber composite board 24. The water continuously cools the bottom of the board, and the upper surface protective adhesive forms a double-layer heat barrier structure to suppress the spread of the heat-affected zone. After all the cutting processes are completed, the first hydraulic cylinder 26 is operated again to lift the water tank 27 until the upper end of the water tank 27 contacts the upper end of the support plate 23. The support plate 23 limits the rising height of the water tank 27. At this time, the carbon fiber composite board 24 is completely immersed in the water in the water tank 27. The protective adhesive on the surface of the board is peeled off through hydrolysis, and the workpiece is cleaned without the need for an additional separate adhesive removal process.

[0032] Example 5: Structure and operation of the scraper lifting and adjusting system driven by the miniature servo electric cylinder 33 The scraper 13 is located at the side opening of the mold 12. A vertical groove is provided on the upper inner wall of the glue outlet of the mold 12. The upper end of the scraper 13 is slidably connected in the vertical groove and can slide freely up and down along the vertical groove. The lower end of the scraper 13 is always parallel to the upper surface of the carbon fiber composite plate 24.

[0033] The cylinder body of the micro servo electric cylinder 33 is fixedly connected to the outer wall of the housing 32. The telescopic end of the micro servo electric cylinder 33 extends through the housing wall into the first cavity and is fixedly connected to the upper end of the scraper 13. The micro servo electric cylinder 33 adopts a split stepper servo motor.

[0034] The miniature servo cylinder 33 is electrically connected to the controller. In use, the operator inputs the target adhesive thickness value through the touch screen. The controller controls the extension and retraction of the miniature servo cylinder 33 according to the preset thickness-stroke correspondence, driving the scraper 13 to slide along the vertical groove to the target position. The gap between the lower end of the scraper 13 and the upper surface of the carbon fiber composite plate 24 is the adhesive thickness. This gap has a linear one-to-one correspondence with the lifting displacement of the scraper.

[0035] Example 6: The Coordinated Working Process of the Shell and the Four-Process Sequence Before the device is started, the operator inputs the target coating thickness value through the touch screen according to the thickness of the carbon fiber composite board 24 to be processed, the preset laser cutting power and the type of protective adhesive. The controller drives the micro servo cylinder 33 to adjust the scraper 13 to the corresponding height.

[0036] After the device is started, the mounting plate 8 moves along the preset direction and goes through the following stages in sequence: First stage of glue injection: The glue injection tube 9 reaches above the carbon fiber composite board 24, the cylinder 10 pushes the piston 11 to press down the protective glue, the glue is injected into the first cavity through the mold 12 and flows out to the surface of the board through the bottom hole. Under the constraint of the mold 12, it forms a strip of glue. Due to the blocking of the light-blocking structure, the ultraviolet light of the irradiation lamp 14 in the second cavity cannot enter the first cavity. The protective glue in the mold 12 remains liquid and will not cure prematurely.

[0037] Second stage of leveling: The mounting plate 8 continues to move, and the scraper 13 arrives to level the upper surface of the strip-shaped adhesive, forming an adhesive layer of uniform thickness.

[0038] Third stage curing: As the mounting plate 8 continues to move, the irradiation lamp 14 arrives. The highly reflective inner wall of the second cavity focuses the ultraviolet light onto the adhesive layer surface behind the scraper, allowing the adhesive layer to cure quickly and fully within a short irradiation window, forming a solid protective layer.

[0039] Fourth stage cutting: The mounting plate 8 moves last, the laser head 15 arrives, and the laser beam passes through the solidified protective layer to cut the carbon fiber composite plate 24. The solid protective layer acts as a thermal isolation barrier to prevent the laser heat from spreading to the upper surface of the plate.

[0040] The above four stages are completed sequentially during a single continuous movement of the mounting plate 8. The four processes of gluing, leveling, curing, and cutting are closely linked and tightly coupled in time and space.

[0041] The foregoing has shown and described the basic principles, main features, and advantages of the present invention. Those skilled in the art should understand that the present invention is not limited to the above embodiments. The embodiments and descriptions in the specification are merely illustrative of the principles of the invention. Various changes and modifications can be made to the invention without departing from its spirit and scope, and all such changes and modifications fall within the scope of protection claimed by the present invention. The scope of protection of the present invention is defined by the appended claims and their equivalents.

Claims

1. A laser cutting device for carbon fiber composite materials, comprising a fixing frame (1), a mounting plate (8), and a carbon fiber composite plate (24), wherein a laser head (15) is fixedly connected to the mounting plate (8), characterized in that, Also includes: The glue injection assembly is mounted on the mounting plate (8) and includes a glue injection tube (9), a scraper (13) and an illumination lamp (14). The housing (32) is located at the injection port of the injection tube (9). The housing (32) has a light-blocking structure that divides the interior of the housing (32) into a first cavity and a second cavity that are independent of each other. The outlet of the injection tube (9) is connected to the mold (12). The mold (12) is located in the first cavity. The irradiation lamp (14) is located in the second cavity. The light-blocking structure is used to block the light in the second cavity from entering the first cavity to prevent the protective glue in the mold (12) from being cured prematurely. The second cavity has a light-focusing structure to focus the light emitted by the irradiation lamp (14) onto the surface of the glue layer. The glue injection tube (9), scraper (13), irradiation lamp (14) and laser head (15) are arranged in sequence along the moving direction of the mounting plate (8), so that when the mounting plate (8) moves in a single step along the preset direction, it can sequentially complete the four processes of glue injection, scraping, curing and laser cutting.

2. The carbon fiber composite material laser cutting device according to claim 1, characterized in that: The light-blocking structure is a light-blocking plate, which is fixedly connected between the first cavity and the second cavity. The bottom of the first cavity is provided with a through hole for the colloid to pass through, and the inner wall of the second cavity is a highly reflective surface.

3. The laser cutting device for carbon fiber composite materials according to claim 2, characterized in that: The inner wall of the second cavity is a parabolic or semi-circular arc-shaped high reflective surface, and the illumination lamp (14) is located at the focal point or on the optical axis of the second cavity.

4. The laser cutting device for carbon fiber composite materials according to claim 1, characterized in that: A vertical sliding guide structure is provided between the scraper (13) and the mold (12). The scraper (13) slides up and down along the vertical sliding guide structure to change the gap between the lower end of the scraper (13) and the upper surface of the carbon fiber composite plate (24), thereby controlling the coating thickness.

5. The laser cutting device for carbon fiber composite materials according to claim 4, characterized in that: The vertical sliding guide structure is a vertical groove opened on the upper inner wall of the glue outlet of the mold (12), and the upper end of the scraper (13) is slidably connected in the vertical groove.

6. The laser cutting device for carbon fiber composite materials according to claim 1, characterized in that: The lifting drive mechanism is a miniature servo cylinder (33). The cylinder body of the miniature servo cylinder (33) is fixedly connected to the upper end of the housing (32). The telescopic end of the miniature servo cylinder (33) is fixedly connected to the scraper (13). The miniature servo cylinder (33) is electrically connected to the controller.

7. A laser cutting device for carbon fiber composite materials according to claim 6, characterized in that: The micro servo electric cylinder (33) is a split-type micro servo electric cylinder.

8. The laser cutting device for carbon fiber composite materials according to claim 1, characterized in that: The moving trajectory of the mounting plate (8) simultaneously forms the glue injection path and the laser cutting path. The scraper (13) follows the glue injection tube (9) to smooth the glue layer. The irradiation lamp (14) follows the scraper (13) to irradiate and cure the smoothed glue layer, forming a solid protective layer on the upper surface of the carbon fiber composite board (24). The laser head (15) finally reaches and passes through the solid protective layer to perform laser cutting on the carbon fiber composite board (24). The solid protective layer acts as a thermal isolation barrier during the laser cutting process, preventing the laser heat from spreading to the upper surface of the carbon fiber composite board (24). A water storage tank (27) is provided below the carbon fiber composite plate (24), which stores water. The water in the water storage tank (27) and the solid protective layer together form a double-layer thermal barrier structure with the upper surface solid protective layer providing heat insulation and the lower surface water cooling for heat dissipation, which is used to synergistically suppress the expansion of the heat-affected zone during laser cutting.

9. The laser cutting device for carbon fiber composite materials according to claim 1, characterized in that: The scraper (13) is located at the glue outlet of the mold (12). The scraper (13) is connected to a lifting drive mechanism to drive the scraper (13) to move up and down to control the glue coating thickness.

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