Dynamic protection mechanism of laser cutting detection device and laser cutting device

Abstract

The utility model provides a dynamic protection mechanism of a laser cutting detection device and a laser cutting device.The dynamic protection mechanism of the laser cutting detection device comprises a mounting plate, a laser cutting detection device and a dynamic protection device, the protective cover is arranged on the mounting plate and provided with a detection opening, the detection device is arranged on the mounting plate and located in the protective cover, and the detection opening is used for the detection device to emit detection laser to a cutting target; the driving assembly drives the movable baffle to be rotatably arranged on the protective cover and is used for opening or closing the detection opening; in the detection stage, the movable baffle is controlled by the driving assembly to be switched to the opening state so as to open the detection opening, and in the non-detection stage, the movable baffle is switched to the closing state so as to close the detection opening. According to the dynamic protection mechanism of the laser cutting detection device, the detection device can be dynamically protected, and the service life of the detection device is prolonged.

Description

Technical Field

[0001] This application belongs to the field of laser processing technology, and more specifically, relates to a dynamic protection mechanism for a laser cutting detection device and a laser cutting device. Background Technology

[0002] In the field of laser tube cutting, cutting precision directly affects the quality of the finished product. Especially in high-precision applications such as the home furnishing industry, traditional laser cutting machines often fail to meet actual precision requirements due to their complex mechanical structure and the accumulation of errors from multi-axis linkages. To improve precision, related technologies typically involve adding laser detection devices (such as vision inspection systems) to identify the tube position in real time and feed the data back to the cutting system for dynamic compensation, thereby achieving high-precision cutting.

[0003] However, the aforementioned detection devices have significant drawbacks in practical applications: due to the high-temperature environment of the laser cutting area and the metal dust and spatter generated during processing, the detection devices are constantly exposed to these harsh conditions, making them highly susceptible to burns from high temperatures or dust contamination, leading to decreased detection accuracy, and even equipment damage and shortened lifespan. Existing protection solutions are mostly fixed shielding structures, unable to dynamically open and close during the switching between detection and cutting processes, resulting in the detection devices remaining continuously exposed to the contaminated environment even during the cutting stage. How to provide precise and dynamic protection for the detection devices has become a key issue restricting the development of high-precision laser cutting technology. Utility Model Content

[0004] This application provides a dynamic protection mechanism for a laser cutting inspection device, which can dynamically protect the inspection device and extend its service life.

[0005] The technical solution adopted in this application embodiment is: to provide a dynamic protection mechanism for a laser cutting detection device, including:

[0006] Mounting plate, located near the laser cutting area;

[0007] A protective cover is provided on the mounting plate and has a detection port. The detection device is provided on the mounting plate and located inside the protective cover. The detection port allows the detection device to emit a detection laser towards the cutting target.

[0008] Movable baffle, and;

[0009] A driving component that drives the movable baffle to be rotatably mounted on the protective cover for opening or closing the detection port;

[0010] During the detection phase, the movable baffle is controlled by the drive component to switch to an open state to open the detection port, and during the non-detection phase, it switches to a closed state to close the detection port.

[0011] Furthermore, the mounting plate is provided with a fixed shaft, and the drive assembly includes a linear driver, a first link, and a second link;

[0012] The first connecting rod includes a rotating part and a first end and a second end extending from the rotating part. An angle is formed between the first end and the second end. The rotating part is rotatably sleeved on the fixed shaft. The first end is connected to the movable baffle.

[0013] One end of the second connecting rod is hinged to the output end of the linear actuator, and the other end is hinged to the second end;

[0014] The linear actuator pushes the first link to rotate around the fixed axis via the second link, thereby causing the movable baffle to perform opening and closing actions.

[0015] Furthermore, the included angle between the first end and the second end is 90°.

[0016] Furthermore, the linear actuator is a cylinder, and the piston rod end of the cylinder is hinged to the second connecting rod via a Y-shaped connector.

[0017] Furthermore, it also includes a guide structure, the guide structure comprising:

[0018] A guide plate, disposed on the mounting plate and located at the end of the movable baffle away from the fixed shaft, has an arc-shaped guide groove, the center of which is collinear with the axis of the fixed shaft; and

[0019] A protruding post is provided at the end of the movable baffle away from the fixed axis, and the protruding post is embedded in the guide groove;

[0020] When the movable baffle rotates, the protruding post slides along the guide groove, constraining the rotation trajectory of the movable baffle to be an arc path centered on the fixed axis.

[0021] Furthermore, the movable baffle includes a baffle body and connecting portions located at both ends of the baffle body, one of the connecting portions being fixedly connected to the first end, and the protruding post being disposed on the other connecting portion.

[0022] Furthermore, the detection ports are multiple and arranged at intervals along the length of the protective cover;

[0023] The length extension direction of the baffle body is consistent with the length direction of the protective cover, and the coverage area of ​​the baffle body is larger than the distribution area of ​​all detection ports.

[0024] When the movable baffle is in the closed state, the baffle body simultaneously closes all detection ports.

[0025] Furthermore, the inner side of the protective cover is provided with a heat insulation layer.

[0026] Furthermore, the edge of the movable baffle is provided with an elastic sealing strip, and when the movable baffle is in the closed state, the sealing strip is in interference fit with the inner wall of the protective cover.

[0027] This application also provides a laser cutting apparatus, including a laser cutting machine and a dynamic protection mechanism for a laser cutting detection device as described in any of the above claims, wherein the mounting plate is disposed on the laser cutting machine, and the detection laser of the detection device is directed toward the chuck area of ​​the laser cutting machine.

[0028] The beneficial effects of the dynamic protective mechanism of the laser cutting inspection device provided in this application embodiment are as follows: In the dynamic protective mechanism of the laser cutting inspection device in this application embodiment, the mounting plate serves as the basic component, firmly placing the entire protective mechanism near the laser cutting area. The protective cover has an inspection port, which not only ensures the path for the inspection device to emit the inspection laser but also provides a protective frame. The movable baffle corresponds to the inspection port and is rotatably connected to the inside of the protective cover. In conjunction with the drive component, it realizes the dynamic opening and closing of the inspection port. During the inspection phase, the drive component controls the movable baffle to rotate to the open state, allowing the inspection device to smoothly emit the inspection laser without affecting the inspection function. During the non-inspection phase, the movable baffle switches to the closed state under the action of the drive component, sealing the inspection port and isolating the inspection device from the harsh environment of high temperature, metal dust, and splashes in the cutting area. This structural design avoids problems such as decreased inspection accuracy and equipment damage caused by long-term exposure to harsh working conditions, effectively extending the service life of the inspection device. At the same time, the dynamic protection feature allows the protective mechanism to be flexibly adjusted when switching between inspection and cutting processes, ensuring both inspection accuracy and improved protection effect, and powerfully promoting the development of high-precision laser cutting technology. Attached Figure Description

[0029] To more clearly illustrate the technical solutions in the embodiments of this application, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0030] Figure 1 This is a three-dimensional structural diagram of the laser cutting device provided in the embodiments of this application.

[0031] Figure 2 A three-dimensional structural diagram of the movable baffle of the dynamic protection mechanism of the laser cutting detection device provided in the embodiment of this application when the baffle is in the closed state;

[0032] Figure 3A three-dimensional structural diagram of the dynamic protective mechanism of the laser cutting detection device provided in this application embodiment after the protective cover has been removed;

[0033] Figure 4 for Figure 3 Enlarged view of point A in the middle;

[0034] Figure 5 A three-dimensional structural diagram of the dynamic protective mechanism of the laser cutting detection device provided in this application embodiment after the protective cover has been removed;

[0035] Figure 6 for Figure 5 Enlarged view at point B;

[0036] Figure 7 A three-dimensional structural diagram of the movable baffle of the dynamic protection mechanism of the laser cutting detection device provided in this application embodiment when it is in the open state.

[0037] The following are the labeling elements in the figure:

[0038] 10. Mounting plate; 11. Fixed shaft; 12. Fixing bracket;

[0039] 20. Protective cover; 21. Inspection port;

[0040] 30. Movable baffle; 31. Baffle body; 32. Connecting part;

[0041] 40. Drive assembly; 41. Linear actuator; 42. First link; 421. Rotating part; 422. First end; 423. Second end; 43. Second link; 44. Y-type connector;

[0042] 50. Guide structure; 51. Guide plate; 511. Arc-shaped guide groove; 52. Protruding column;

[0043] 60. Detection device; 61. Detection laser;

[0044] 70. Laser cutting machine. Detailed Implementation

[0045] To make the technical problems, technical solutions, and beneficial effects to be solved by this application clearer, the following detailed description is provided in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative and are not intended to limit the scope of this application.

[0046] It should be noted that when a component is referred to as being "fixed to" or "set on" another component, it can be directly on or indirectly on that other component. When a component is referred to as being "connected to" another component, it can be directly connected to or indirectly connected to that other component.

[0047] It should be understood that the terms "length", "width", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this application.

[0048] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of this application, "multiple" means two or more, unless otherwise explicitly specified.

[0049] Please see Figure 1 and Figure 2 The dynamic protection mechanism of the laser cutting inspection device provided in this application embodiment will now be described. The dynamic protection mechanism of the laser cutting inspection device provided in this application embodiment includes a mounting plate 10, a protective cover 20, a movable baffle 30, and a drive assembly 40.

[0050] Reference Figure 1 Mounting plate 10 is located near the laser cutting area. As the foundation of the entire protective mechanism, mounting plate 10 is positioned near the laser cutting area to provide a stable mounting position for subsequent components. In practical applications, mounting plate 10 can be a rectangular metal plate, bolted to a specific frame of the laser cutting machine 70; or it can be a custom-made L-shaped plate, welded to the frame of the laser cutting equipment to ensure the protective mechanism remains stable under the vibration of laser cutting.

[0051] Reference Figure 2 and Figure 7A protective cover 20 is mounted on the mounting plate 10 and has a detection port 21. The detection port 21 allows the detection device 60 to emit a detection laser 61 towards the cutting target. The detection device 60 is mounted on the mounting plate 10 and located inside the protective cover 20. The protective cover 20 is mounted on the mounting plate 10 and provides the main protection for the internal detection device 60. The detection port 21 on the protective cover 20 provides a channel for the detection device 60 to emit the detection laser 61. For example, the protective cover 20 can be made of high-temperature resistant and impact-resistant stainless steel to form a closed cavity structure; the shape of the detection port 21 can be designed to be circular or square according to the beam shape of the detection device 60, with a precise size to fit the emitting end of the detection device 60, ensuring that the detection laser 61 can be emitted smoothly, while minimizing the entry of external contaminants into the protective cover 20.

[0052] Reference Figure 2 and Figure 3 A movable baffle 30 is rotatably disposed inside the protective cover 20 and corresponds to the detection port 21, used to open or close the detection port 21. The movable baffle 30 is equivalent to a movable sash of an "observation window". When the detection device 60 needs to work, the movable baffle 30 is opened, the detection port 21 is exposed, and the detection laser 61 can be emitted normally; during the cutting stage when detection is not required, the movable baffle 30 closes the detection port 21 to prevent the intrusion of high temperature, metal dust, and splashes. The movable baffle 30 can be a lightweight and high-strength alloy plate, connected to the inner wall of the protective cover 20 by a pivot or hinge to achieve flexible rotation; it can also be made of transparent high-temperature resistant glass, which allows for observation of the internal situation while closing the detection port 21.

[0053] The drive assembly 40 is connected to the movable baffle 30 and is used to drive the movable baffle 30 to rotate. The drive assembly 40 can be in the form of an electric push rod, which drives the lead screw through a motor to extend and retract the push rod, thereby pushing the movable baffle 30 to rotate; or it can be a cylinder drive assembly 40, which uses compressed air to push the piston to realize the opening and closing action of the movable baffle 30.

[0054] During the detection phase, the movable baffle 30, controlled by the drive assembly 40, switches to an open state to expose the detection port 21, and switches to a closed state to close the detection port 21 during the non-detection phase. During the detection phase, the drive assembly 40 receives a control signal and drives the movable baffle 30 to switch to the open state, opening the detection port 21; during the non-detection phase, the drive assembly 40 operates again, causing the movable baffle 30 to rotate to the closed state, closing the detection port 21. This achieves precise dynamic protection for the detection device 60, ensuring stable operation of the detection device 60 in harsh laser cutting environments.

[0055] Reference Figure 3 and Figure 4The mounting plate 10 is provided with a fixed shaft 11, which acts as the "axis" of the entire drive system, providing a stable rotation fulcrum for the movement of subsequent components. Specifically, a fixing frame 12 is fixed on the mounting plate 10, and the fixed shaft 11 is mounted on the fixing frame 12. The fixed shaft 11 can be a cylindrical solid shaft made of high-strength alloy steel.

[0056] The drive assembly 40 includes a linear actuator 41, a first connecting rod 42, and a second connecting rod 43. The linear actuator 41 is the power source for the entire drive assembly 40 and can be an electric linear actuator or a pneumatic cylinder. The electric linear actuator converts the rotational motion of the motor into the linear reciprocating motion of the actuator by driving a lead screw and nut mechanism with a motor; the pneumatic cylinder uses compressed air to push the piston to move linearly within the cylinder. Both can stably output linear driving force.

[0057] Reference Figure 3 and Figure 4 The first connecting rod 42 includes a rotating part 421 and a first end 422 and a second end 423 extending from the rotating part 421. An angle is formed between the first end 422 and the second end 423. The rotating part 421 is rotatably sleeved on the fixed shaft 11, and the first end 422 is connected to the movable baffle 30. The specific angle between the first end 422 and the second end 423 allows for effective force transmission and direction conversion during rotation. The rotating part 421 is rotatably sleeved on the fixed shaft 11, ensuring that the first connecting rod 42 can rotate freely around the fixed shaft 11. The first end 422 is connected to the movable baffle 30, directly driving the movable baffle 30 when the first connecting rod 42 rotates. The first connecting rod 42 can be integrally formed from a lightweight but high-strength aluminum alloy material to improve movement flexibility and reduce overall weight.

[0058] One end of the second connecting rod 43 is hinged to the output end of the linear actuator 41, and the other end is hinged to the second end 423. The second connecting rod 43 acts as a bridge; its hinged connection to the output end of the linear actuator 41 ensures that the second connecting rod 43 can swing freely within a certain angle range when the linear actuator 41 moves; its other end is hinged to the second end 423 of the first connecting rod 42, thus converting the linear motion of the linear actuator 41 into the rotational motion of the first connecting rod 42. The second connecting rod 43 can be made of carbon steel and forged to ensure that it will not easily deform during power transmission.

[0059] Reference Figure 3 and Figure 4The linear actuator 41 drives the first connecting rod 42 to rotate around the fixed shaft 11 via the second connecting rod 43, thereby causing the movable baffle 30 to perform opening and closing actions. When the linear actuator 41 is activated, for example, the electric linear push rod extends forward, pushing the second connecting rod 43 hinged to it. As the second connecting rod 43 swings, it drives the first connecting rod 42 to rotate around the fixed shaft 11. Since the first end 422 of the first connecting rod 42 is connected to the movable baffle 30, the rotation of the first connecting rod 42 drives the movable baffle 30 to perform opening or closing actions. During the detection phase, the detection port 21 is opened, and during the non-detection phase, the detection port 21 is closed, achieving precise dynamic protection for the detection device 60 and ensuring the stability and efficiency of the laser cutting detection process.

[0060] Reference Figure 4 The angle between the first end 422 and the second end 423 is 90°, a choice that has significant engineering implications and mechanical advantages. The 90° angle gives the first connecting rod 42 an "L-shaped" structure, which allows for an efficient force transmission path between the linear actuator 41 and the movable baffle 30. For example, when the linear actuator 41 (such as an electric actuator or pneumatic cylinder) applies a linear driving force to the second end 423 of the first connecting rod 42 via the second connecting rod 43, the 90° angle decomposes this force into a tangential force perpendicular to the fixed shaft 11 and a radial force along the radial direction. The tangential force directly drives the first connecting rod 42 to rotate around the fixed shaft 11, while the radial force is offset by the support structure of the fixed shaft 11, thereby minimizing energy loss and improving transmission efficiency.

[0061] Reference Figure 4 The linear actuator 41 is a cylinder, and the piston rod end of the cylinder is hinged to the second connecting rod 43 via a Y-shaped connector 44. As a linear actuator 41, the cylinder features fast response speed, stable output force, and easy control. In high-frequency detection and cutting process switching scenarios during laser cutting, the cylinder can quickly complete its extension and retraction movements, causing the movable baffle 30 to rapidly open or close the detection port 21.

[0062] The use of the Y-shaped connector 44 further optimizes the power transmission process. Shaped like the letter "Y," one end of the Y-shaped connector 44 is hinged to the piston rod end of the cylinder, while the other end splits into two branches that are hinged to the second connecting rod 43 respectively. This structural design allows the linear driving force of the cylinder to be transmitted more evenly to the second connecting rod 43. When the cylinder piston rod extends or retracts, the hinge points of the two arms of the Y-shaped connector 44 and the second connecting rod 43 are simultaneously stressed, avoiding stress concentration problems that may occur with single-point stress and effectively reducing the risk of component damage.

[0063] Reference Figure 5 and Figure 6It also includes a guide structure 50, which includes a guide plate 51 and a protrusion 52.

[0064] The guide plate 51 is disposed on the mounting plate 10 and located at the end of the movable baffle 30 away from the fixed shaft 11. An arc-shaped guide groove 511 is provided on the guide plate 51, and the center of the guide groove is collinear with the axis of the fixed shaft 11.

[0065] The guide plate 51, as the basic component of the guide structure 50, is securely mounted on the mounting plate 10 and located at the end of the movable baffle 30 furthest from the fixed shaft 11. The center of the arc-shaped guide groove 511 on the guide plate 51 is collinear with the axis of the fixed shaft 11, ensuring the stability of the movable baffle 30 during rotation. In actual manufacturing, the guide plate 51 is usually made of high-strength stainless steel and machined by precision CNC machine tools to ensure the arc accuracy of the guide groove. This high-precision machining ensures that the protrusion 52 can slide smoothly along the guide groove during the rotation of the movable baffle 30 without any jamming.

[0066] A protruding post 52 is located at the end of the movable baffle 30 away from the fixed shaft 11, and the protruding post 52 is embedded in the guide groove. The protruding post 52 can be made of wear-resistant alloy steel and hardened to enhance its surface hardness, making it less prone to wear during frequent sliding. When the drive assembly 40 drives the movable baffle 30 to rotate, the protruding post 52 will slide along the guide groove. Since the center of the guide groove is collinear with the axis of the fixed shaft 11, the movable baffle 30 always moves along a specific arc path with the fixed shaft 11 as the center when rotating.

[0067] When the movable baffle 30 rotates, the protruding post 52 slides along the guide groove, constraining the rotation trajectory of the movable baffle 30 to be an arc path centered on the fixed axis 11.

[0068] The guide structure 50 effectively avoids problems such as offset and wobbling of the movable baffle 30 during rotation due to uneven force or loose parts, ensuring that the movable baffle 30 can accurately open and close the detection port 21. In the high-frequency working scenario of laser cutting, it can ensure that the rotation trajectory of the movable baffle 30 remains consistent each time, improving the stability and reliability of the protective mechanism, further ensuring that the detection device 60 can work accurately during the detection stage and receive good protection during the cutting stage, thus contributing to the stable application of high-precision laser cutting technology.

[0069] Reference Figure 3 The movable baffle 30 includes a baffle body 31 and connecting portions 32 located at both ends of the baffle body 31. One of the connecting portions 32 is fixedly connected to the first end 422, and the protruding post 52 is provided on the other connecting portion 32.

[0070] The baffle body 31 is the core part of the movable baffle 30. During non-detection phases, it closes the detection port 21 to isolate the high temperature, metal dust, and spatter in the laser cutting area, protecting the detection device 60. During detection phases, it opens the detection port 21 to provide a channel for the detection device 60 to emit the detection laser 61. The baffle body 31 is typically made of high-temperature resistant and impact-resistant materials, such as quartz glass or special ceramics, which can withstand harsh environments.

[0071] Reference Figure 4 The connecting portions 32 located at both ends of the baffle body 31 act as a "bridge," effectively connecting the baffle body 31 with the drive assembly 40 and the guide structure 50. One of the connecting portions 32 is fixedly connected to the first end 422 of the first connecting rod 42. This connection method ensures that the power generated by the drive assembly 40 can be stably transmitted to the movable baffle 30. The connection can be secured with high-strength bolts by opening corresponding threaded holes in the connecting portion 32 and the first end 422, and then using bolts to secure them tightly. Alternatively, welding can be used to firmly weld the connecting portion 32 and the first end 422 together, ensuring that there will be no loosening during frequent rotation, so that the rotational movement of the first connecting rod 42 can accurately drive the movable baffle 30 to perform opening and closing actions.

[0072] Reference Figure 6 Another connecting part 32 is provided with a protruding post 52, which cooperates with the guide groove in the guide structure 50 to guide the rotation trajectory of the movable baffle 30. The connection between the protruding post 52 and the connecting part 32 is generally an embedded design, in which mounting holes adapted to the shape of the protruding post 52 are machined on the connecting part 32 and the protruding post 52 is embedded in them, or a threaded connection is used, in which threads are machined on the protruding post 52 and the connecting part 32 and tightened to ensure that the protruding post 52 is securely installed. When the drive assembly 40 drives the movable baffle 30 to rotate, the protruding post 52 on this connecting part 32 will slide along the arc-shaped guide groove 511 of the guide plate 51, and drive the baffle body 31 to move along a precise arc path with the fixed shaft 11 as the center, so that the movable baffle 30 can accurately open or close the detection port 21, thereby achieving precise dynamic protection of the detection device 60 and ensuring the stability and efficiency of the laser cutting detection process.

[0073] Reference Figure 2 and Figure 3 The detection ports 21 are multiple and arranged at intervals along the length direction of the protective cover 20; the length extension direction of the baffle body 31 is consistent with the length direction of the protective cover 20, and the coverage area of ​​the baffle body 31 is larger than the distribution area of ​​all detection ports 21; when the movable baffle 30 is in the closed state, the baffle body 31 simultaneously closes all detection ports 21.

[0074] The detection ports 21 are arranged in a multi-port configuration, spaced apart along the length of the protective cover 20. This layout is designed based on the needs of actual industrial applications. Taking pipe cutting as an example, when processing long metal pipes, single-point detection often cannot fully capture the positional deviations and shape errors of the pipe, easily leading to a decrease in cutting accuracy. By setting multiple detection ports 21 and configuring a detection device 60 such as a laser rangefinder or vision sensor at each detection port 21, synchronous monitoring of different positions of the pipe can be achieved.

[0075] The structural design of the movable baffle 30 is precisely matched with the layout of the detection ports 21. The length of the baffle body 31 extends in the same direction as the protective cover 20, and its coverage extends beyond the distribution area of ​​all detection ports 21, ensuring complete protection. When the movable baffle 30 is closed, the baffle body 31 acts like a tight "protective curtain," simultaneously shielding all detection ports 21. During the cutting process, even if high-speed splashes of molten metal particles are generated, they will be intercepted by the baffle body 31, preventing them from impacting or contaminating the optical lens of the detection device 60. Compared to traditional independent protective structures, this centralized coverage design not only reduces the number of moving parts and lowers the risk of mechanical failure, but also simplifies the drive system, increasing the opening and closing response speed by 30%, making it more suitable for high-frequency cutting-inspection cycle operations.

[0076] Furthermore, a heat insulation layer is provided on the inner side of the protective cover 20. The high heat generated during laser cutting (local temperatures can reach over 1000℃) can damage the detection device 60 inside the protective cover 20 through thermal radiation and heat conduction, causing problems such as thermal deformation of optical components and performance drift of electronic components. The heat insulation layer effectively blocks this heat transfer path. Specifically, the heat insulation layer can be made of highly efficient heat insulation materials such as aerogel felt or ceramic fiber blanket.

[0077] Furthermore, the edge of the movable baffle 30 is provided with an elastic sealing strip. When the movable baffle 30 is in the closed state, the sealing strip is in interference fit with the inner wall of the protective cover 20.

[0078] In laser cutting environments, metal dust, high-temperature debris, and spatter are highly invasive. If there are gaps in the protective shield, they can easily seep into the interior of the protective cover 20, causing contamination and damage to the detection device 60. The elastic sealing strip effectively fills the gap between the movable baffle 30 and the inner wall of the protective cover 20, creating a tight protective barrier.

[0079] The elastic sealing strip is fixed to the edge of the movable baffle 30 by high-temperature resistant adhesive or an embedded groove. When the movable baffle 30 is in the closed state, the sealing strip forms an interference fit with the inner wall of the protective cover 20, that is, the sealing strip is subjected to a certain degree of compression deformation. This deformation allows the sealing strip to fit tightly against the slight unevenness of the inner wall of the protective cover 20, completely sealing the gaps and preventing dust, debris, etc. from entering.

[0080] This application embodiment also provides a laser cutting device, including a laser cutting machine 70 and a dynamic protection mechanism of the laser cutting detection device as described in any of the above claims, wherein the mounting plate 10 is disposed on the laser cutting machine 70, and the detection laser 61 of the detection device 60 is directed toward the chuck area of ​​the laser cutting machine 70.

[0081] The laser cutting apparatus of this application embodiment includes the dynamic protection mechanism of the laser cutting detection apparatus in any of the above embodiments, and therefore has the beneficial effects brought by the dynamic protection mechanism of the laser cutting detection apparatus in any of the above embodiments, which will not be repeated here.

[0082] The above description is merely a preferred embodiment of this application and is not intended to limit this application. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of this application should be included within the protection scope of this application.

Claims

1. A dynamic protection mechanism for a laser cutting detection device, characterized in that, include: Mounting plate, located near the laser cutting area; A protective cover is provided on the mounting plate and has a detection port. The detection device is provided on the mounting plate and located inside the protective cover. The detection port allows the detection device to emit a detection laser towards the cutting target. Movable baffle, and; A driving component that drives the movable baffle to be rotatably mounted on the protective cover for opening or closing the detection port; During the detection phase, the movable baffle is controlled by the drive component to switch to an open state to open the detection port, and during the non-detection phase, it switches to a closed state to close the detection port.

2. The dynamic protection mechanism of the laser cutting detection device according to claim 1, characterized in that, The mounting plate is provided with a fixed shaft, and the drive assembly includes a linear driver, a first link, and a second link. The first connecting rod includes a rotating part and a first end and a second end extending from the rotating part. An angle is formed between the first end and the second end. The rotating part is rotatably sleeved on the fixed shaft. The first end is connected to the movable baffle. One end of the second connecting rod is hinged to the output end of the linear actuator, and the other end is hinged to the second end; The linear actuator pushes the first link to rotate around the fixed axis via the second link, thereby causing the movable baffle to perform opening and closing actions.

3. The dynamic protection mechanism of the laser cutting detection device according to claim 2, characterized in that, The included angle between the first end and the second end is 90°.

4. The dynamic protection mechanism of the laser cutting detection device according to claim 2, characterized in that, The linear actuator is a cylinder, and the piston rod end of the cylinder is hinged to the second connecting rod via a Y-shaped connector.

5. The dynamic protection mechanism of the laser cutting detection device according to claim 2, characterized in that, It also includes a guide structure, the guide structure comprising: A guide plate, disposed on the mounting plate and located at the end of the movable baffle away from the fixed shaft, has an arc-shaped guide groove, the center of which is collinear with the axis of the fixed shaft; and A protruding post is provided at the end of the movable baffle away from the fixed axis, and the protruding post is embedded in the guide groove; When the movable baffle rotates, the protruding post slides along the guide groove, constraining the rotation trajectory of the movable baffle to be an arc path centered on the fixed axis.

6. The dynamic protection mechanism of the laser cutting detection device according to claim 5, characterized in that, The movable baffle includes a baffle body and connecting portions located at both ends of the baffle body. One of the connecting portions is fixedly connected to the first end, and the protruding post is provided on the other connecting portion.

7. The dynamic protection mechanism of the laser cutting detection device according to claim 6, characterized in that, The detection ports are multiple and arranged at intervals along the length of the protective cover; The length extension direction of the baffle body is consistent with the length direction of the protective cover, and the coverage area of ​​the baffle body is larger than the distribution area of ​​all detection ports. When the movable baffle is in the closed state, the baffle body simultaneously closes all detection ports.

8. The dynamic protection mechanism of the laser cutting detection device according to claim 1, characterized in that, The inner side of the protective cover is provided with a heat insulation layer.

9. The dynamic protection mechanism of the laser cutting detection device according to claim 1, characterized in that, The edge of the movable baffle is provided with an elastic sealing strip. When the movable baffle is in the closed state, the sealing strip is in an interference fit with the inner wall of the protective cover.

10. A laser cutting device, characterized in that, The invention includes a laser cutting machine and a dynamic protective mechanism for a laser cutting inspection device as described in any one of claims 1 to 9, wherein the mounting plate is disposed on the laser cutting machine, and the detection laser of the inspection device is directed toward the chuck area of ​​the laser cutting machine.

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