A collision detection system and method for a dual-channel laser cutting machine

Abstract

This invention discloses a dual-channel laser cutting machine collision detection system and method. By physically isolating the crossbeam assembly and the machine bed with isolation pads, a collision can be detected extremely quickly and sensitively by applying voltage to the crossbeam assembly and grounding the machine bed, combined with voltage monitoring. This allows for rapid shutdown of the crossbeam assembly and minimizes collision damage. Furthermore, the inclusion of a crossbeam collision detection device and a cutting head collision detection device ensures immediate response in case of voltage monitoring failure, preventing severe collisions. The entire system features a dual-insurance design: one for rapid response and the other for mitigating further damage, significantly improving the stability, reliability, and timeliness of collision detection.

Description

Technical Field

[0001] This invention relates to the field of laser processing technology, specifically to a collision detection system and method for a dual-channel laser cutting machine. Background Technology

[0002] Laser cutting uses an invisible laser beam instead of a traditional mechanical blade, offering advantages such as high precision, fast cutting speed, no limitation on cutting patterns, automatic layout for material savings, smooth cuts, and low processing costs. It is gradually improving upon or replacing traditional metal cutting equipment. The mechanical parts of the laser cutter head do not contact the workpiece, preventing scratches on the workpiece surface during operation. Laser cutting is fast, producing smooth and flat cuts that generally require no further processing. It features a small heat-affected zone, minimal sheet deformation, and narrow kerf (0.1mm–0.3mm). The cut is free of mechanical stress and shear burrs. It offers high processing accuracy, good repeatability, and does not damage the material surface. CNC programming allows for the processing of any planar shape, enabling the cutting of large sheets without the need for molds, saving time and money. Therefore, laser cutting technology is widely used in the automotive, machinery, power, hardware, and electrical appliance industries.

[0003] Existing dual-channel laser cutting machines generally rely on algorithm control to achieve collision avoidance. Since each channel has at least three degrees of freedom, the collision avoidance algorithm is extremely complex, involves a huge amount of data, and places extremely high demands on the controller. Furthermore, since the risk of collision cannot be completely eliminated, once a collision occurs, the algorithm-based collision avoidance design cannot respond quickly enough to stop the machine, resulting in very large collision losses.

[0004] Solving these problems is now a top priority. Summary of the Invention

[0005] To address the above technical problems, this invention provides a dual-channel laser cutting machine collision detection system and its collision detection method.

[0006] The technical solution is as follows:

[0007] A collision detection system for a dual-channel laser cutting machine includes a bed and two parallel crossbeam assemblies. The bed includes a horizontally positioned bed base and a bed frame symmetrically arranged vertically on both sides of the bed base along the X-axis. Each bed frame has an X-axis motorized linear module extending along the X-axis mounted on its upper edge. Each crossbeam assembly includes a crossbeam extending along the Y-axis, a Z-axis body extending along the Z-axis, and a laser cutting head mounted on the lower end of the Z-axis body. Each crossbeam has a Y-axis motorized linear module extending along the Y-axis mounted on it, with a Y-axis slide fixedly mounted on the slide of each Y-axis motorized linear module. Each Z-axis body has a Z-axis motorized linear module extending along the Z-axis. The slides of the electric linear module are fixedly connected to the corresponding Y-axis slides. Each X-axis electric linear module includes an X-axis slide groove extending along the X-axis direction and opened on the upper part of the corresponding bed frame, an X-axis rack installed parallel to the X-axis slide groove on the upper edge of the bed frame, two X-axis sliders that slide with the X-axis slide groove, and X-axis drive motors installed on the corresponding X-axis sliders. Each X-axis drive motor has an X-axis gear meshing with the corresponding X-axis rack mounted synchronously on its motor shaft. The feature is that: both ends of the crossbeam are equipped with crossbeam collision detection devices, each crossbeam collision detection device is installed on the corresponding X-axis slider through an insulating isolation pad, and each laser cutting head is equipped with a cutting head collision detection device.

[0008] A collision detection method for the aforementioned dual-channel laser cutting machine collision detection system includes:

[0009] S1. Rapid collision detection for dual-channel laser cutting machines, including:

[0010] S11. Apply voltage U1 to one of the crossbeam assemblies, with resistor R1 connected in series; apply voltage U2 to the other crossbeam assembly, with resistor R2 connected in series, where U1 ≠ U2; ground the bed.

[0011] S12. When the output voltage of any crossbeam assembly drops to 0V, output a collision signal between the crossbeam assembly and the bed.

[0012] S13. When the output voltages of the two crossbeam assemblies are equal, output a collision signal between the two crossbeam assemblies.

[0013] S2. Perform collision detection on the dual-channel laser cutting machine, including:

[0014] S21. When the crossbeam collision detection device of any crossbeam assembly is triggered, the collision signal between the crossbeam of the crossbeam assembly and the bed, as well as the signal for rapid detection failure, are output to the outside.

[0015] S22. When the crossbeam collision detection devices of both crossbeam assemblies are triggered, the collision signal of the crossbeams of the two crossbeam assemblies and the signal of rapid detection failure are output to the outside.

[0016] S23. When the collision detection device of the cutting head of any crossbeam assembly is triggered, the collision signal of the laser cutting head of the crossbeam assembly and the signal of rapid failure detection are output to the outside.

[0017] Compared with the prior art, the beneficial effects of the present invention are as follows:

[0018] A dual-channel laser cutting machine collision detection system and method employing the above technical solution physically isolates the crossbeam assembly and the machine bed using isolation pads. This allows for immediate collision detection by applying voltage to the crossbeam assembly and grounding the machine bed, combined with voltage monitoring. The system is highly sensitive and can quickly stop the crossbeam assembly, minimizing collision damage. Furthermore, the inclusion of a crossbeam collision detection device and a cutting head collision detection device ensures immediate response in case of voltage monitoring failure, preventing severe collisions. The entire system features a dual-insurance design: one for rapid response and the other as a fallback to prevent further damage, significantly improving the stability, reliability, and timeliness of collision detection. Attached Figure Description

[0019] Figure 1 This is a schematic diagram of a collision detection system for a dual-channel laser cutting machine.

[0020] Figure 2 A schematic diagram showing the working relationship between the Z-axis machine body, the laser cutting head, and the cutting head collision detection device;

[0021] Figure 3 A cross-sectional view of the main structure of the cutting head collision detection device;

[0022] Figure 4 This is a schematic diagram of the beam collision detection device.

[0023] Figure 5 This is a schematic diagram of the collision detection method in a dual-channel laser cutting machine collision detection system.

[0024] Figure 6 This is a schematic diagram of the display panel. Detailed Implementation

[0025] The present invention will be further described below with reference to the embodiments and accompanying drawings.

[0026] like Figure 1As shown, a collision detection system for a dual-channel laser cutting machine mainly includes a bed 1 and two parallel crossbeam assemblies mounted on the bed 1. The bed 1 includes a bed base 1a and two bed frames 1b. The bed base 1a is a rectangular plate structure arranged horizontally, with the X-axis representing its length, the Y-axis its width, and the Z-axis its thickness. The two bed frames 1b are vertically and symmetrically arranged on both sides of the bed base 1a along its width, i.e., symmetrically arranged on both sides of the Y-axis.

[0027] Each bed frame 1b has an X-axis electric linear module 2 extending along the X-axis mounted on its upper edge. Each crossbeam assembly includes a crossbeam 3 extending along the Y-axis, a Z-axis body 4 extending along the Z-axis, and a laser cutting head 5 mounted on the lower end of the Z-axis body 4. Each crossbeam 3 has a Y-axis electric linear module 6 extending along the Y-axis mounted on its slide. Each Y-axis electric linear module 6 has a Y-axis slide 7 fixedly mounted on its slide. Each Z-axis body 4 has a Z-axis electric linear module 8 extending along the Z-axis, with the slide of each Z-axis electric linear module 8 fixedly connected to its corresponding Y-axis slide 7. The two X-axis electric linear modules 2 can precisely adjust the position of the crossbeam 3 in the X-axis direction, the Y-axis electric linear module 6 can precisely adjust the position of the Y-axis slide 7 in the Y-axis direction, and the Z-axis electric linear module 8 can precisely adjust the positions of the Z-axis body 4 and the laser cutting head 5 in the Z-axis direction, thereby precisely controlling the position of the laser cutting head 5 in three-dimensional space.

[0028] Each X-axis electric linear module 2 includes an X-axis groove 2a extending along the X-axis direction and located on the upper part of the corresponding bed frame 1b; an X-axis rack 2b mounted parallel to the X-axis groove 2a on the upper edge of the bed frame 1b; two X-axis sliders 2c that slide in cooperation with the X-axis groove 2a; and X-axis drive motors 2d mounted on the corresponding X-axis sliders 2c. Each X-axis drive motor 2d has an X-axis gear 2e that meshes with the corresponding X-axis rack 2b mounted synchronously on its motor shaft. The motor shaft of the X-axis drive motor 2d drives the X-axis gear 2e to rotate synchronously. The X-axis gear 2e cooperates with the X-axis rack 2b to drive the X-axis slider 2c to slide along the X-axis groove 2a, which is stable, reliable, and has high control precision.

[0029] Please see Figure 1 and Figure 4 Both ends of the crossbeam 3 are equipped with crossbeam collision detection devices 9, and each crossbeam collision detection device 9 is mounted on the corresponding X-axis slider 2c via an insulating isolation pad 10. Specifically, each crossbeam collision detection device 9 includes a detection device base plate 9a mounted on the corresponding isolation pad 10, a detection device support 9b mounted on the corresponding end of the crossbeam 3, and multiple disc spring buffers 9c evenly distributed around the detection device support 9b in the circumferential direction.

[0030] The detection device base plate 9a is separated from the X-axis electric linear module 2, meaning that the detection device base plate 9a does not contact the X-axis slider 2c or the X-axis drive motor 2d. Specifically, the X-axis drive motor 2d is mounted on corresponding isolation pads 10, with a gap between it and the adjacent detection device base plate 9a. The motor shaft of the X-axis drive motor 2d passes downward through the isolation pads 10 and the X-axis slider 2c in sequence, and is synchronously fitted with the X-axis gear 2e. This ensures reliable installation of the X-axis electric linear module 2 and achieves physical isolation between it and the crossbeam assembly through the isolation pads 10.

[0031] The detection device's base plate 9a is equipped with linear bearing seats 9d, each corresponding to a disc spring buffer 9c. The outer ends of each disc spring buffer 9c can slidably pass through the linear bearing seats 9d. Each linear bearing seat 9d is equipped with a first proximity switch 9e that engages with the outer end of the corresponding disc spring buffer 9c. Therefore, when the outer end of a disc spring buffer 9c approaches or contacts the first proximity switch 9e, the first proximity switch 9e is activated, indicating that a collision has occurred in the crossbeam assembly. When the outer end of a disc spring buffer 9c moves away from the first proximity switch 9e, the first proximity switch 9e deactivates, indicating that no collision has occurred in the crossbeam assembly. By setting multiple disc spring buffers 9c in conjunction with the first proximity switches 9e, not only can the location of the collision be accurately identified, but it can also act as a buffer, reducing or preventing collision damage.

[0032] Furthermore, the disc spring buffer 9c includes a disc spring mounting shaft 9c1 and a first disc spring assembly 9c2 mounted on the disc spring mounting shaft 9c1. The inner end of the disc spring mounting shaft 9c1 is fixedly mounted on the corresponding detection device support 9b, and the outer end is slidably mounted on the corresponding linear bearing seat 9d. The inner end of the first disc spring assembly 9c2 is elastically supported on the detection device support 9b, and the outer end is elastically supported on the corresponding linear bearing seat 9d. Therefore, when the outer end of the disc spring mounting shaft 9c1 approaches or contacts the first proximity switch 9e, the first proximity switch 9e is activated; when the outer end of the disc spring mounting shaft 9c1 moves away from the first proximity switch 9e, the first proximity switch 9e is deactivated. The disc spring buffer 9c has a simple and reliable structure, which not only accurately identifies the location of the collision in conjunction with the first proximity switch 9e, but also provides excellent buffering, reducing or avoiding collision damage.

[0033] Furthermore, each disc spring mounting shaft 9c1 is fitted with a first preload nut 9c3 that is threadedly engaged with it. The first preload nut 9c3 is supported between the corresponding first disc spring assembly 9c2 and the linear bearing housing 9d. By adjusting the first preload nut 9c3, the preload force of the first disc spring assembly 9c2 can be adjusted, thereby controlling the triggering threshold of the first disc spring assembly 9c2, providing high flexibility to adapt to different needs.

[0034] Furthermore, both the bed 1 and the crossbeam assembly are coated with a conductive coating to further enhance conductivity and improve voltage detection sensitivity. The isolation pad 10 is made of insulating ceramic, providing excellent insulation performance and stable reliability.

[0035] Please see Figures 1-3 Each laser cutting head 5 is equipped with a cutting head collision detection device 11. Specifically, the laser cutting head 5 includes a cutting head base 5a and a laser body 5b that is vertically mounted on the lower end of the cutting head base 5a. The outer peripheral surface of the cutting head base 5a has an upper flange ring 5a1, and the outer peripheral surface of the laser body 5b has a lower flange ring 5b1 that is adapted to the upper flange ring 5a1.

[0036] In this embodiment, the laser body 5b includes a laser emitter and a laser emitter mounting base. The laser emitter can rotate relative to the laser emitter mounting base to improve the flexibility of laser cutting. The lower flange ring 5b1 is located on the outer circumferential surface of the laser emitter mounting base.

[0037] The cutting head collision detection device 11 includes multiple disc spring mounting bolts 11a evenly distributed circumferentially around the laser body 5b, and a second disc spring assembly 11b and a third disc spring assembly 11c fitted onto the disc spring mounting bolts 11a. The upper and lower ends of the disc spring mounting bolts 11a are slidably inserted into the corresponding upper flange ring 5a1 and lower flange ring 5b1, respectively, with the head of the disc spring mounting bolt 11a located above the upper flange ring 5a1. The upper and lower ends of the second disc spring assembly 11b are elastically supported on the disc spring mounting bolts 11a. Between the head of bolt 11a and the upper flange ring 5a1, the upper and lower ends of the third disc spring assembly 11c are elastically supported between the upper flange ring 5a1 and the lower flange ring 5b1, respectively. The threaded part of the disc spring mounting bolt 11a passes downward through the lower flange ring 5b1 and is fitted with a second preload nut 11d that is threadedly engaged with it. A second proximity switch 11e is provided next to each disc spring mounting bolt 11a. Each second proximity switch 11e is fixedly installed on the corresponding lower flange ring 5b1 and located below the corresponding upper flange ring 5a1. Therefore, when the second proximity switch 11e approaches or contacts the upper flange ring 5a1, the second proximity switch 11e is activated; when the second proximity switch 11e moves away from the upper flange ring 5a1, the second proximity switch 11e is deactivated. By setting multiple second disc spring assemblies 11b, third disc spring assemblies 11c, and second proximity switches 11e, not only can the location of the collision be accurately identified, but it can also play a buffering role, reducing or avoiding collision damage.

[0038] Please see Figure 3Each disc spring mounting bolt 11a is fitted with two disc spring mounting washers 11f and one leveling washer 11g. The two disc spring mounting washers 11f are located on the upper and lower sides of the upper flange ring 5a1, respectively, and the leveling washer 11g is located on the upper side of the lower flange ring 5b1. The lower end of the second disc spring assembly 11b is elastically supported on the upper disc spring mounting washers 11f, and the upper and lower ends of the third disc spring assembly 11c are elastically supported on the lower disc spring mounting washers 11f and leveling washers 11g, respectively. By setting the disc spring mounting washers 11f and leveling washers 11g, not only can the installation reliability of the second disc spring assembly 11b and the third disc spring assembly 11c be effectively improved, but the installation posture can also be maintained.

[0039] Please see Figure 5 A collision detection method for the aforementioned dual-channel laser cutting machine collision detection system, characterized in that it includes:

[0040] S1. Rapid collision detection for dual-channel laser cutting machines, including:

[0041] S11. Apply voltage U1 to one of the crossbeam components, with resistor R1 connected in series; apply voltage U2 to the other crossbeam component, with resistor R2 connected in series, where U1 ≠ U2; ground the bed 1. It should be noted that in this embodiment, both U1 and U2 are below 24V, which are safe voltages that will not affect the human body or the surrounding environment, thus improving system safety; the resistance values ​​of resistors R1 and R2 are both greater than or equal to 1kΩ to ensure safety.

[0042] S12. When the output voltage of any crossbeam assembly drops to 0V, a collision signal between the crossbeam assembly and the bed 1 is output. It may be that the crossbeam 3 collides with the bed 1, or it may be that the laser cutting head 5 collides with the bed 1.

[0043] S13. When the output voltages of the two crossbeam assemblies are equal, output a collision signal between the two crossbeam assemblies. For example: U1 is 5V, U2 is 3V, and R1 = R2 = 1kΩ. When the output voltage of the two crossbeam assemblies is detected to be approximately 4V, it indicates that the two crossbeam assemblies have collided. This could be a collision between the two crossbeams 3, a collision between the two laser cutting heads 5, or a collision between the crossbeam 3 and the laser cutting head 5.

[0044] Specifically, when any position of the crossbeam assembly A collides with any position of the bed 1, the voltage value of the crossbeam assembly A will be pulled down to 0V by the bed 1. The voltage detection device will detect the negative signal and transmit it to the main controller. At this time, the "Crossbeam Assembly A Collision Signal with Bed 1" indicator light on the panel will be lit, and the collision signal analysis panel will display the message "Crossbeam Assembly A Collided with Bed 1".

[0045] When any position of the crossbeam assembly B collides with any position of the bed 1, the voltage value of the crossbeam assembly B will be pulled down to 0V by the bed 1. The voltage detection device will detect the negative signal and transmit it to the main controller. At this time, the "Crossbeam Assembly B Collision Signal with Bed 1" indicator light on the panel will be lit, and the collision signal analysis panel will display the message "Crossbeam Assembly B Collided with Bed 1".

[0046] When any position of crossbeam assembly A collides with any position of crossbeam assembly B, the voltage of the two crossbeam assemblies will become equal. The voltage detection device will transmit the detected voltage change information to the main controller. At this time, the "Collapse Signal of Crossbeam Assembly A and Crossbeam Assembly B" indicator light on the panel will be lit, and the collision signal analysis panel will display the message: "Collapse Signal of Crossbeam Assembly A and Crossbeam Assembly B".

[0047] S2. Perform collision detection on the dual-channel laser cutting machine, including:

[0048] S21. When the crossbeam collision detection device 9 of any crossbeam assembly is triggered, it outputs the collision signal between the crossbeam 3 of the crossbeam assembly and the bed 1, as well as the signal for rapid detection failure.

[0049] S22. When the crossbeam collision detection devices 9 of both crossbeam assemblies are triggered, the collision signals of the crossbeams 3 of the two crossbeam assemblies and the signal of rapid detection failure are output to the outside.

[0050] S23. When the collision detection device 11 of the cutting head of any crossbeam assembly is triggered, the collision signal of the laser cutting head 5 of the crossbeam assembly and the signal of rapid failure detection are output to the outside.

[0051] Specifically, in this embodiment, the beam collision detection device 9 is equipped with eight first proximity switches 9e, which are evenly distributed circumferentially in eight directions. Similarly, the cutting head collision detection device 11 is equipped with eight second proximity switches 11e, which are evenly distributed circumferentially in eight directions. This design allows for accurate determination of the location and orientation of the collision.

[0052] Please see Figure 6 The first proximity switch 9e of each beam collision detection device 9 and the second proximity switch 11e of each cutting head collision detection device 11 are located in the same positions as the indicator lights on the display panel.

[0053] Taking the crossbeam collision detection device 9 on the left side of crossbeam assembly A as an example, when crossbeam assembly A is impacted backward by crossbeam assembly B (generally, the Z-axis body on crossbeam assembly B collides with the crossbeam and Z-axis body of crossbeam assembly A), the first disc spring group 1 is compressed, and the corresponding central telescopic axis moves outward, triggering the first proximity switch 1. Whether the first proximity switch signals 2 and 8 are triggered depends mainly on whether the external force compresses the corresponding first disc spring group. When the external force is small and insufficient to overcome the pressure of the first disc spring group, the signal will not be triggered; conversely, when the external force is large enough, the signal will be triggered. Due to the weakening of the external force, the first disc spring group 5 retracts its central axial linear bearing under the action of preload; the signal will never be triggered. The above-mentioned triggered switch signals will be displayed at the corresponding positions on the panel. At the same time, the analysis panel will display "Crossbeam assembly A is impacted backward". When the first proximity switch signal 2 or 8 is also triggered after 1 is triggered, the alarm panel will highlight the alarm content in red.

[0054] Similarly, when beam assembly A is impacted to the left rear by beam assembly B, the No. 8 first disc spring group is compressed, and the corresponding central telescopic axis moves outward, triggering the No. 8 first proximity switch. Whether the No. 1 and No. 7 first proximity switch signals are triggered depends mainly on whether the external force compresses their corresponding disc springs. When the external force is small and insufficient to overcome the disc spring pressure, the signal will not be triggered; conversely, when the external force is large enough, the signal will be triggered. Due to the weakening of the external force, the No. 4 first disc spring group retracts its central axial linear bearing under the action of preload; the signal will never be triggered. The triggered first proximity switch signals will be displayed at the corresponding positions on the panel. At the same time, the analysis panel will display "Beam assembly A is impacted to the left rear." If the No. 1 or No. 7 first proximity switch signal is also triggered after the No. 8 is triggered, the alarm panel will highlight the alarm content in red.

[0055] Taking the crossbeam collision detection device 9 on the right side of crossbeam assembly B as an example, when crossbeam assembly B is impacted to the right by crossbeam assembly A (generally, the Z-axis body on crossbeam assembly A collides with the crossbeam and Z-axis body of crossbeam assembly B), the No. 3 first disc spring group is compressed, and the corresponding central telescopic axis moves outward, triggering the No. 3 first proximity switch; whether the signals of the No. 2 and No. 4 first proximity switches are triggered depends mainly on whether the external force compresses the corresponding first disc spring group. When the external force is small and insufficient to overcome the pressure of the first disc spring group, the signal will not be triggered; conversely, when the external force is large enough, the signal will be triggered; the No. 7 first disc spring group, due to the weakening of the external force, retracts its central axial linear bearing under the action of preload; the signal will never be triggered. The above-mentioned triggered switch signals will be displayed at the corresponding positions on the panel, and at the same time, the analysis panel will display "Crossbeam assembly B is impacted to the right". When the No. 2 or No. 4 first proximity switch signal is also triggered after the No. 3 is triggered, the alarm panel will highlight the alarm content in red.

[0056] Similarly, when beam assembly B is impacted by the front right side of beam assembly A (generally, the Z-axis body of beam assembly A collides with the beam and Z-axis body of beam assembly B), the No. 4 first disc spring group is compressed, and the corresponding central telescopic axis moves outward, triggering the No. 4 first proximity switch. Whether the No. 3 and No. 5 first proximity switches are triggered depends mainly on whether the external force compresses their corresponding first disc spring groups. When the external force is small and insufficient to overcome the pressure of the first disc spring groups, the signal will not be triggered; conversely, when the external force is large enough, the signal will be triggered. Due to the weakening of the external force, the No. 8 first disc spring group retracts its central axial linear bearing under the action of preload; the signal will never be triggered. The above-mentioned triggered switch signals will be displayed at the corresponding positions on the panel. At the same time, the analysis panel will display "Beam assembly B is impacted to the front right". If the No. 3 or No. 5 first proximity switch signal is also triggered after the No. 4 is triggered, the alarm panel will highlight the alarm content in red.

[0057] Taking the cutting head collision detection device 11 of the crossbeam assembly A as an example, when the laser cutting head of the crossbeam assembly A is impacted by the Z-axis body of the crossbeam assembly B or by the laser cutting head moving backward, the laser cutting head compresses the third disc spring group No. 1 backward and upward, which also causes the corresponding second disc spring group No. 1 to rebound. The corresponding locking nut will move outward, reducing the distance between the laser cutting head and the Z-axis body, thereby triggering the second proximity switch No. 1. Whether the signals of the second proximity switches No. 2 and No. 8, which are closer to the second proximity switch No. 1, are triggered depends mainly on whether the external force compresses their corresponding disc springs. When the external force is small and insufficient to overcome the disc springs... Under pressure, the signal will not be triggered; conversely, when the external force is large enough, the signal will be triggered. The third disc spring group of No. 5 will be subjected to downward tension, and the second disc spring group of No. 5 will be compressed. The distance between the laser cutting head and the Z-axis body will be further increased, and the corresponding second proximity switch signal will not be triggered. The triggered second proximity switch signals will be displayed at the corresponding positions on the panel. At the same time, the analysis panel will display "The laser cutting head of the crossbeam assembly A is subjected to a backward impact". When the second proximity switch signal of No. 2 or No. 8 is also triggered after No. 1 is triggered, the alarm panel will highlight the alarm content in red.

[0058] Taking the cutting head collision detection device 11 of the crossbeam assembly B as an example, when the laser cutting head of the crossbeam assembly B is impacted by the Z-axis body of the crossbeam assembly A or by the laser cutting head in the left-forward direction, the laser cutting head compresses the third disc spring group of No. 6 in the left-forward direction. At the same time, the corresponding second disc spring group of No. 6 will rebound, and the corresponding locking nut will move outward. The distance between the laser cutting head and the Z-axis body will decrease, thereby triggering the second proximity switch of No. 6. Whether the signals of the second proximity switches No. 5 and No. 7, which are closer to the second proximity switch of No. 6, are triggered depends mainly on whether the external force compresses their corresponding disc springs. When the external force is small and insufficient to overcome the disc spring compression, the signal will be triggered. When the spring is under pressure, the signal will not be triggered; conversely, when the external force is large enough, the signal will be triggered. The third disc spring group of No. 2 will be subjected to a downward pulling force, and the second disc spring group of No. 2 will be compressed. The distance between the laser cutting head and the Z-axis body will be further increased, and the corresponding second proximity switch signal will not be triggered. The triggered second proximity switch signals will be displayed at the corresponding positions on the panel. At the same time, the analysis panel will display "The laser cutting head of the crossbeam assembly A is impacted in the left-forward direction". When the second proximity switch signal of No. 5 or No. 7 is also triggered after No. 6 is triggered, the alarm panel will highlight the alarm content in red.

[0059] In the description of this invention, it should be understood that the terms "center," "longitudinal," "lateral," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "clockwise," and "counterclockwise," 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 invention 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 invention.

[0060] In this invention, unless otherwise explicitly specified and limited, the terms "installation," "connection," "linking," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this invention according to the specific circumstances.

[0061] In this invention, unless otherwise explicitly specified and limited, "above" or "below" the second feature can include direct contact between the first and second features, or contact between the first and second features through another feature between them. Furthermore, "above," "over," and "on top" of the second feature includes the first feature directly above or diagonally above the second feature, or simply indicates that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature includes the first feature directly below or diagonally below the second feature, or simply indicates that the first feature is at a lower horizontal level than the second feature.

[0062] Finally, it should be noted that the above description is merely a preferred embodiment of the present invention. Those skilled in the art, under the guidance of the present invention, can make various similar representations without departing from the spirit and claims of the present invention, and such modifications all fall within the protection scope of the present invention.

Claims

1. A collision detection system for a dual-channel laser cutting machine, comprising a bed and two parallel crossbeam assemblies. The bed includes a horizontally positioned bed base and a bed frame symmetrically arranged vertically on both sides of the bed base along the X-axis. An X-axis electric linear module extending along the X-axis is mounted on the upper edge of each bed frame. Each crossbeam assembly includes a crossbeam extending along the Y-axis, a Z-axis body extending along the Z-axis, and a laser cutting head mounted on the lower end of the Z-axis body. A Y-axis electric linear module extending along the Y-axis is mounted on each crossbeam, and the slides of the Y-axis electric linear modules are fixedly mounted on... The machine body is equipped with a Y-axis slide block, and each Z-axis machine body is equipped with a Z-axis electric linear module extending along the Z-axis direction. The slide of each Z-axis electric linear module is fixedly connected to the corresponding Y-axis slide block. Each X-axis electric linear module includes an X-axis slide groove extending along the X-axis direction and formed on the upper part of the corresponding machine frame, an X-axis rack mounted parallel to the X-axis slide groove on the upper edge of the machine frame, two X-axis sliders slidingly engaged with the X-axis slide groove, and X-axis drive motors mounted on the corresponding X-axis sliders. Each X-axis drive motor has an X-axis gear synchronously rotatably mounted on its motor shaft, meshing with the corresponding X-axis rack. Both ends of the crossbeam are equipped with a crossbeam collision detection device. Each crossbeam collision detection device is installed on the corresponding X-axis slider through an insulating isolation pad. Each laser cutting head is equipped with a cutting head collision detection device. Each beam collision detection device includes a detection device base plate that is separately mounted on a corresponding isolation pad from the X-direction electric linear module, a detection device support seat mounted on the end of the corresponding beam, and multiple disc spring buffers that are evenly distributed around the detection device support seat in the circumferential direction. The detection device base plate is equipped with linear bearing seats that correspond one-to-one with each disc spring buffer. The outer end of each disc spring buffer can be slidably mounted on the linear bearing seat. Each linear bearing seat is equipped with a first proximity switch that cooperates with the outer end of the corresponding disc spring buffer. The disc spring buffer includes a disc spring mounting shaft and a first disc spring assembly mounted on the disc spring mounting shaft. The inner end of the disc spring mounting shaft is fixedly mounted on the corresponding detection device support, and the outer end is slidably mounted on the corresponding linear bearing seat. The inner end of the first disc spring assembly is elastically supported on the detection device support, and the outer end is elastically supported on the corresponding linear bearing seat. The laser cutting head includes a cutting head base and a laser body that can be lifted and lowered and mounted on the lower end of the cutting head base. The outer peripheral surface of the cutting head base has an upper flange ring, and the outer peripheral surface of the laser body has a lower flange ring that is adapted to the upper flange ring. The cutting head collision detection device includes multiple disc spring mounting bolts evenly distributed around the laser body in the circumferential direction, and a second disc spring group and a third disc spring group fitted on the disc spring mounting bolts. The upper and lower ends of the disc spring mounting bolts are slidably inserted into the corresponding upper flange ring and lower flange ring, respectively, and the head of the disc spring mounting bolt is located above the upper flange ring. The upper and lower ends of the second disc spring group are elastically supported between the head of the disc spring mounting bolt and the upper flange ring, respectively. The upper and lower ends of the third disc spring group are elastically supported between the upper flange ring and the lower flange ring, respectively. The threaded part of the disc spring mounting bolt passes downward through the lower flange ring and is fitted with a second preload nut that is threadedly engaged with it. A second proximity switch is provided next to each disc spring mounting bolt. Each second proximity switch is fixedly installed on the corresponding lower flange ring and located below the corresponding upper flange ring. When the outer end of the disc spring mounting shaft approaches or contacts the first proximity switch, the first proximity switch is activated. When the outer end of the disc spring mounting shaft moves away from the first proximity switch, the first proximity switch stops. The second proximity switch is activated when it approaches or contacts the upper flange ring. The second proximity switch stops when it moves away from the upper flange ring.

2. The collision detection system for a dual-channel laser cutting machine according to claim 1, characterized in that: Each disc spring mounting shaft is fitted with a first preload nut that is threaded to it, and the first preload nut is supported between the corresponding first disc spring assembly and the linear bearing housing.

3. The collision detection system for a dual-channel laser cutting machine according to claim 1, characterized in that: The X-axis drive motors are respectively mounted on the corresponding isolation pads, with a gap between them and the base plate of the adjacent detection device. The X-axis drive motors pass through the isolation pads and the X-axis slider in sequence downwards and are then synchronously fitted with the X-axis gears.

4. The collision detection system for a dual-channel laser cutting machine according to claim 1, characterized in that: Each disc spring mounting bolt is fitted with two disc spring mounting washers and one leveling washer. The two disc spring mounting washers are located on the upper and lower sides of the upper flange ring, respectively. The leveling washer is located on the upper side of the lower flange ring. The lower end of the second disc spring assembly is elastically supported on the upper disc spring mounting washer. The upper and lower ends of the third disc spring assembly are elastically supported on the lower disc spring mounting washer and the leveling washer, respectively.

5. The collision detection system for a dual-channel laser cutting machine according to claim 1, characterized in that: The insulating pad is made of insulating ceramic.

6. A collision detection method for a dual-channel laser cutting machine collision detection system according to any one of claims 1-5, characterized in that, include: S1. Rapid collision detection for dual-channel laser cutting machines, including: S11. Apply voltage U1 to one of the crossbeam assemblies, with resistor R1 connected in series; apply voltage U2 to the other crossbeam assembly, with resistor R2 connected in series, where U1 ≠ U2; ground the bed. S12. When the output voltage of any crossbeam assembly drops to 0V, output a collision signal between the crossbeam assembly and the bed. S13. When the output voltages of the two crossbeam assemblies are equal, output a collision signal between the two crossbeam assemblies. S2. Perform collision detection on the dual-channel laser cutting machine, including: S21. When the crossbeam collision detection device of any crossbeam assembly is triggered, the collision signal between the crossbeam of the crossbeam assembly and the bed, as well as the signal for rapid detection failure, are output to the outside. S22. When the crossbeam collision detection devices of both crossbeam assemblies are triggered, the collision signal of the crossbeams of the two crossbeam assemblies and the signal of rapid detection failure are output to the outside. S23. When the collision detection device of the cutting head of any crossbeam assembly is triggered, the collision signal of the laser cutting head of the crossbeam assembly and the signal of rapid failure detection are output to the outside.

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