Beam buffer device of laser cutting machine and multi-beam laser cutting machine

Abstract

The utility model relates to a laser cutting machine beam buffer device and a multi-beam laser cutting machine, and belongs to the field of laser cutting machine accessories. According to the technical scheme, the beam buffering device of the laser cutting machine comprises a first shell capable of being connected with a machine tool beam, a buffering assembly is arranged at one end or two ends of the first shell, the buffering assembly comprises a middle shaft, the middle shaft is horizontally arranged and movably penetrates through the end face of the first shell, and a buffering block is arranged at the end, located outside the first shell, of the middle shaft; the middle shaft is further sleeved with a spring, one end of the spring abuts against the buffer block, and the other end of the spring abuts against the end face of the first shell. A stop block is arranged at the end, located in the first shell, of the middle shaft. The buffering device is installed at the end of each cross beam and moves along with the cross beams, one end of the buffering device makes contact with the other end of the buffering device on the adjacent cross beam, impact force generated when the cross beams collide is absorbed through a double buffering structure of the buffering blocks and the springs, the operation safety of the multi-cross-beam laser cutting machine is improved, and the service life of the multi-cross-beam laser cutting machine is prolonged.

Description

Technical Field

[0001] This utility model relates to the field of laser cutting machine accessories, and in particular to a laser cutting machine crossbeam buffer device and a multi-beam laser cutting machine. Background Technology

[0002] Multi-beam laser cutting machines are processing equipment upgraded from traditional laser cutting machines. They feature two or more beams on the machine bed that can move independently or collaboratively, with each beam carrying a corresponding laser cutting head. Through parallel operation of multiple beams, this equipment can handle multiple processing tasks simultaneously or cover larger workpiece sizes, significantly improving processing efficiency and productivity. It is widely used in large-scale, high-precision metal material cutting scenarios.

[0003] Currently, the anti-collision measures for the crossbeams of laser cutting machines mainly rely on two layers of protection: one is the software anti-collision mechanism at the system level, which avoids collisions by pre-setting the running trajectory and monitoring the crossbeam spacing in real time; the other is the mechanical hard limit structure, which serves as the last resort after the software protection fails. This is used in traditional laser cutting machines and usually involves setting blocks or protrusions at the ends of the bed to directly prevent the crossbeams from getting too close together, thereby preventing collisions.

[0004] However, the anti-collision structure of ordinary single-beam laser cutting machines is set between the beam and the bed. For multi-beam cutting machines, setting a limiting structure on the bed for the beam located in the middle will affect the beam's stroke. Therefore, the middle beams of existing multi-beam laser cutting machines rely on rigid limiting structures set on each other as the final limiting means. They are mostly in rigid contact. Once a collision occurs, the impact force will be directly transmitted to the beam body, which can easily cause irreversible damage such as beam deformation and guide rail wear, seriously affecting the processing accuracy and service life of the equipment. Utility Model Content

[0005] This invention addresses the problem that current multi-beam laser cutting machines lack effective buffering and limiting methods for the crossbeams located in the middle, by providing a laser cutting machine crossbeam buffer device.

[0006] To solve the above problems, the technical solution adopted by this utility model is a laser cutting machine crossbeam buffer device, including a first housing that can connect to the machine tool crossbeam. A buffer assembly is provided at one or both ends of the first housing. The buffer assembly includes a central shaft, which is horizontally arranged and movably passes through the end face of the first housing. A buffer block is provided at the end of the central shaft located outside the first housing. A spring is also sleeved on the central shaft, with one end abutting against the buffer block and the other end abutting against the end face of the first housing. A stop block is provided at the end of the central shaft located inside the first housing. This device can be installed at the ends of each crossbeam and moves with the crossbeam. One end of the buffer device contacts the other end of the buffer device on the adjacent crossbeam. Through the double buffer structure of the buffer block and the spring, the impact force during crossbeam collision can be effectively absorbed, avoiding irreversible damage such as crossbeam deformation and guide rail wear caused by rigid contact, significantly improving the operational safety and equipment lifespan of multi-crossbeam laser cutting machines.

[0007] As a preferred embodiment of a crossbeam buffer device for a laser cutting machine, one side of the first housing is open, and a cover plate is detachably installed on this side. The end of the central shaft located inside the first housing is machined with an external thread, and the stop block is threadedly installed on the central shaft. The threaded installation of the stop block allows adjustment of its position on the central shaft, thereby adjusting the elongation of the buffer block and the preload stiffness of the spring. This facilitates adjustment of the minimum spacing between the crossbeams and the buffering performance. Based on this, the first housing adopts an openable cover design, allowing for convenient adjustment of the stop block position after opening.

[0008] As a preferred embodiment of a crossbeam buffer device for a laser cutting machine, corresponding to the buffer assembly, a baffle is provided inside the first housing, with a certain distance between the baffle and the end panel of the first housing. The central shaft passes through the baffle, and the stop block abuts against the side of the baffle. A locking square is machined on the outer circumference of the central shaft, located between the end panel of the first housing and the baffle. The baffle, in conjunction with the panel of the first housing, provides two-point guidance for the central shaft, making the extension and retraction of the central shaft more stable and precise, improving the buffering effect. Simultaneously, the locking square on the central shaft allows for the restriction of its rotation using tools such as wrenches, thus facilitating the adjustment of the stop block's position.

[0009] As a preferred embodiment of a crossbeam buffer device for a laser cutting machine, the stop block includes a limiting nut and a back nut, with the side of the limiting nut contacting the side of the back nut. The double-nut locking structure of the limiting nut and the back nut effectively prevents the stop block from loosening under long-term vibration and collision conditions, ensuring the stop block's fixed position, stable buffer stroke and buffer force, avoiding protection failure due to component loosening, and improving the structural stability and durability of the device.

[0010] On the other hand, this utility model also provides a multi-beam laser cutting machine, including a bed on which multiple beams are movably mounted. In the direction of beam movement, one end of each beam has a stop assembly, while the ends of the remaining beams have the aforementioned laser cutting machine beam buffer device. The central axis of the laser cutting machine beam buffer device is arranged along the direction of beam movement, and multiple central axes are coaxially arranged. In the direction of beam movement, the buffer block protrudes from the side of the beam and faces the stop assembly. This cutting machine uses the buffer device and stop assembly together to achieve multi-level buffer protection between beams, avoiding the problem that the middle beam cannot be equipped with a traditional limiting structure due to stroke limitations. Simultaneously, the coaxial arrangement of multiple central axes ensures precise force distribution during collisions, and the design of the buffer block protruding from the side of the beam can trigger buffering in advance, reducing the impact of collisions on the beam body and ensuring the safety of multiple beams operating in parallel.

[0011] As a preferred embodiment of a multi-beam laser cutting machine, a position sensor is also installed inside the first housing. This position sensor detects the position of the stop block and is electrically connected to the laser cutting machine's axial motion system. The position sensor can detect the stop block's movement in real time. Once a collision-triggered buffering action is detected, it immediately sends a signal back to the axial motion system, enabling active intervention such as motor deceleration and machine shutdown. This minimizes collision damage, solves the shortcomings of traditional anti-collision structures that lack real-time detection and feedback, and forms a dual protection system of passive buffering and active intervention, improving the equipment's intelligent protection level.

[0012] As a preferred embodiment of a multi-beam laser cutting machine, a buffer assembly is provided at only one end of the first housing, while the other end of the first housing is flat. The buffer device adopts single-end buffering, with the other end serving as a stop section that contacts the buffer block. This end face is set as a flat surface, which can stably abut against the buffer block, achieving a better buffering effect.

[0013] As a preferred embodiment of a multi-beam laser cutting machine, the stop assembly includes a second housing, the side of the second housing facing the buffer block being a plane. This planar design ensures uniform force distribution when the stop assembly contacts the buffer block, avoiding component damage caused by localized stress concentration. Simultaneously, it improves the fit between the buffer block and the stop assembly, ensuring effective transmission of buffering force and further optimizing the buffering and protective effect.

[0014] This solution also provides another structure for the aforementioned multi-beam laser cutting machine, including a bed on which multiple crossbeams are movably mounted. Each movable crossbeam has a aforementioned laser cutting machine crossbeam buffer device at its end. The central axis of the laser cutting machine crossbeam buffer device is arranged along the moving direction of the crossbeam, and multiple central axes are coaxially arranged. In the moving direction of the crossbeam, the buffer block protrudes from the side of the crossbeam. In the moving direction of the crossbeam, a stop assembly is provided at one end of the upper surface of the bed, directly opposite the buffer block. Each crossbeam is equipped with a buffer device, and the stop assembly at the end of the bed cooperates with the crossbeam buffer device, simultaneously addressing the limiting requirements between the crossbeam and the bed end, as well as the buffering requirements between the crossbeams. This comprehensively covers the collision risk points of the multi-beam laser cutting machine, and the structural layout is reasonable, does not affect the normal stroke of the crossbeams, and ensures the processing efficiency of the equipment.

[0015] As a preferred embodiment of a multi-beam laser cutting machine, the stop assembly includes a second housing, the side of the second housing facing the buffer block being a plane.

[0016] As can be seen from the above technical solutions, the advantages of this utility model are as follows: This buffer device, through the dual buffer structure of buffer block and spring, can effectively absorb the impact force of crossbeam collision, avoid irreversible damage such as crossbeam deformation and guide rail wear caused by rigid contact, and greatly improve the operational safety and service life of the equipment; the stop block adopts a threaded installation and a first housing with an openable cover design, which facilitates the adjustment of the buffer block elongation and spring preload stiffness to adapt to different crossbeam spacing and buffering requirements; the two-point guide and locking structure of the baffle on the central shaft not only ensures the stability and accuracy of the central shaft extension and retraction, but also provides convenience for the adjustment of the stop block; the double nut locking structure of the limit nut and the back nut eliminates the risk of loosening of components under long-term vibration and collision, ensuring stable and reliable buffering performance. The corresponding multi-beam laser cutting machine solves the problem of not being able to set up a traditional limiting structure in the middle beam due to the limited stroke by using a buffer device and a stop assembly. Multiple coaxially set central axes ensure precise force distribution upon collision, and the buffer blocks protruding from the sides of the beam can trigger buffering in advance. The planar design of the stop assembly and the end face of the buffer device ensures uniform force distribution and tight fit, further optimizing the buffering effect. In some solutions, the electrical connection between the position sensor and the shaft motion system enables active intervention after a collision, forming a dual protection of passive buffering and active intervention, improving the intelligence level of the equipment. The structure of each beam equipped with a buffer device fully covers collision risk points without affecting the normal stroke of the beam, ensuring processing efficiency. The overall structure has strong adaptability and is easy to maintain, providing comprehensive protection for the safe and efficient operation of the multi-beam laser cutting machine. Attached Figure Description

[0017] To more clearly illustrate the technical solution of this patent, the drawings used in the description will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this patent. For those skilled in the art, other drawings can be obtained from these drawings without creative effort.

[0018] Figure 1 This is a structural schematic diagram of Embodiment 1 of the present utility model.

[0019] Figure 2 This is a structural schematic diagram of Embodiment 2 of the present invention.

[0020] Figure 3 This is a structural schematic diagram of Embodiment 3 of the present invention.

[0021] Explanation of main figure symbols

[0022] 1. First housing, 2. Central shaft, 3. Buffer block, 4. Stop block, 4-1. Limit nut, 4-2. Back nut, 5. Spring, 6. Baffle, 7. Locking square, 8. Cover plate, 9. Position sensor, 10. Bed, 11. Crossbeam, 12. Second housing. Detailed Implementation

[0023] To make the objectives, features, and advantages of this patent more apparent and understandable, the technical solutions of this patent will be clearly and completely described below with reference to the accompanying drawings of the specific embodiments. Obviously, the embodiments described below are only some embodiments of this patent, and not all embodiments. Based on the embodiments of this patent, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this patent.

[0024] Example 1

[0025] like Figure 1 As shown in the figure, this embodiment discloses a crossbeam buffer device for a laser cutting machine, the specific structure of which is as follows:

[0026] The laser cutting machine crossbeam buffer device includes a first housing 1, which has a rectangular cavity structure. Its back is provided with a connection hole (not shown in the figure) adapted to the machine tool crossbeam. The first housing 1 can be fixedly installed on a preset mounting surface at the end of the crossbeam by bolts passing through the connection hole, achieving a stable connection between the device and the crossbeam. A buffer assembly is provided at one or both ends of the first housing 1. The buffer assembly includes a central shaft 2, a buffer block 3, a stop block 4, and a spring 5. The central shaft 2 is horizontally arranged, and a guide hole adapted to the outer diameter of the central shaft 2 is provided on the end panel of the first housing 1. The central shaft 2 can movably pass through the end face of the first housing 1 through the guide hole, ensuring stable horizontal extension and contraction of the central shaft 2.

[0027] A buffer block 3 is fixedly mounted on one end of the central shaft 2 located outside the first housing 1 via a threaded connection. The buffer block 3 is made of elastic rubber, and its end away from the central shaft 2 has an arc-shaped contact surface, which is used to first contact the force and initially absorb the impact force during a collision. A spring 5 is also coaxially sleeved on the central shaft 2. One end of the spring 5 is in close contact with the inner end face of the buffer block 3, and the other end of the spring 5 is in close contact with the outer wall of the end panel of the first housing 1. The spring 5 is in a slightly pre-compressed state in its natural state to ensure a rapid response and provide buffering force during a collision.

[0028] The central shaft 2 has an external thread at one end located inside the first housing 1. The stop block 4 is threaded onto the end of the central shaft 2 through the external thread. The stop block 4 includes a limiting nut 4-1 and a back nut 4-2. The limiting nut 4-1 is tightened onto the external thread of the central shaft 2, and the back nut 4-2 is tightened against the side of the limiting nut 4-1, forming a double nut locking structure, which effectively prevents the stop block 4 from loosening under long-term vibration and collision conditions.

[0029] One side of the first housing 1 is open, and a cover plate 8 is detachably installed on this open side by bolts. Opening the cover plate 8 facilitates the adjustment of the limiting nut 4-1 and the back nut 4-2 inside the first housing 1. Furthermore, corresponding to the buffer assembly, a baffle 6 is welded and fixed inside the first housing 1. The baffle 6 is spaced at a preset distance from the end panel of the first housing 1 to form a central shaft guide cavity. The baffle 6 has a second guide hole that matches the outer diameter of the central shaft 2. The central shaft 2 passes through the second guide hole and is clearance-fitted with both the guide hole and the second guide hole to achieve two-point guidance of the central shaft 2, ensuring that the telescopic movement of the central shaft 2 is precise and stable. The outer end face of the stop block 4 abuts against the inner side face of the baffle 6 to limit the initial extension position of the central shaft 2; a locking square 7 is machined on the outer peripheral surface of the central shaft 2. The locking square 7 is located in the guide cavity between the end panel of the first housing 1 and the baffle 6. By holding the locking square 7 with a wrench, the rotation of the central shaft 2 can be restricted, thereby facilitating the tightening or adjustment of the position of the stop block 4.

[0030] Example 2

[0031] Based on the laser cutting machine beam buffer device provided in Embodiment 1, this utility model further provides a multi-beam laser cutting machine, such as... Figure 2As shown, a multi-beam laser cutting machine includes a bed 10, on which multiple beams 11 are movably mounted. In the direction of movement of the beams 11, a stop assembly is provided at the end of one beam 11, and the ends of the remaining beams 11 are provided with the laser cutting machine beam buffer device described in Embodiment 1. The central axis 2 of the laser cutting machine beam buffer device is arranged along the direction of movement of the beams 11, and multiple central axes 2 are coaxially arranged. In the direction of movement of the beams 11, the buffer block 3 protrudes from the side of the beam 11 and is directly opposite the stop assembly.

[0032] The first housing 1 is fixedly connected to the end of the crossbeam 11 by bolts. The central axis 2 of the buffer device is arranged along the moving direction of the crossbeam 11, and the central axes 2 on all crossbeams 11 are arranged coaxially to ensure that the buffer blocks 3 can accurately align when adjacent crossbeams 11 are close together. The buffer blocks 3 are arranged protruding from the side of the crossbeam 11 and are directly opposite the stop assembly on the other end of the crossbeam 11 or the buffer blocks 3 on the adjacent crossbeam 11 to ensure that buffering is effectively triggered upon collision.

[0033] The first housing 1 is also equipped with a position sensor 9. The position sensor 9 is a proximity switch with its sensing end facing the stop 4, and is used to detect the position change of the stop 4 in real time. The position sensor 9 is electrically connected to the axial motion system of the laser cutting machine through a wire. When the stop 4 moves with the central axis 2 into the sensing range of the position sensor 9, the position sensor 9 immediately sends a signal to the axial motion system. After receiving the signal, the axial motion system controls the drive motor to decelerate or stop, thereby realizing active anti-collision intervention.

[0034] The first housing 1 has the buffer assembly at only one end, and the other end of the first housing 1 is a flat end face. This flat end face can serve as the contact surface of adjacent buffer devices to ensure uniform force distribution during collision. The stop assembly includes a second housing 12, which is fixedly installed to the end face of the end beam 11 by bolts. The side of the second housing 12 facing the buffer block 3 is a flat contact surface, which is adapted to the arc-shaped contact surface of the buffer block 3 to ensure that the two fit tightly together during collision, thereby improving the buffering effect.

[0035] Example 3

[0036] This embodiment provides another type of multi-beam laser cutting machine, such as... Figure 3As shown, the multi-beam laser cutting machine includes a bed 10, on which multiple beams 11 are movably mounted. Each beam 11 has a beam buffer device as described in Embodiment 1 fixedly mounted at both ends by bolts. The first housing 1 of the buffer device is fixedly connected to the end of the beam 11. The central axis 2 of the buffer device is arranged along the moving direction of the beam 11, and all central axes 2 are coaxially arranged. The buffer block 3 protrudes from the side of the beam 11, ensuring that when adjacent beams 11 approach each other, adjacent buffer blocks 3 can precisely engage and trigger buffering.

[0037] In the direction of movement of the crossbeam 11, a stop assembly is bolted to one end of the upper surface of the bed 10. The stop assembly is directly opposite the buffer block 3 on the outermost crossbeam 11 and is used to limit the maximum travel of the crossbeam 11. The stop assembly includes a second housing 12, the side of the second housing 12 facing the buffer block 3 being a flat contact surface. The flat contact surface is adapted to the arc-shaped contact surface of the buffer block 3, ensuring that when the crossbeam 11 moves to the end, the buffer block 3 can tightly abut against the flat surface of the second housing 12, absorbing the impact force and avoiding rigid collisions.

[0038] As can be seen from the above embodiments, the beneficial effects of this utility model are as follows: In this solution, the double buffer structure composed of the buffer block and the spring can effectively absorb the impact force when the crossbeam collides, avoiding irreversible damage such as crossbeam deformation and guide rail wear caused by traditional rigid limiting. Combined with the planar design of the stop component and the end face of the buffer device, it can ensure uniform force distribution and tight fit during collision, significantly improving the operational safety and service life of the multi-crossbeam laser cutting machine. The stop block adopts a threaded installation and an openable cover design with the first housing. Combined with the locking structure on the central shaft, it can not only flexibly adjust the elongation of the buffer block and the preload stiffness of the spring to adapt to different crossbeam spacings and buffering requirements, but also restrict the rotation of the central shaft by holding the locking structure with a wrench, making the stop block adjustment more convenient. The double-nut locking structure of the limiting nut and the back nut can prevent the components from loosening under long-term vibration and collision conditions, ensuring stable buffer stroke and force. The two-point guide design of the housing ensures precise and smooth extension and retraction of the central axis, further enhancing the structural stability, durability, and buffer reliability of the device. The multi-beam laser cutting machine effectively solves the problem of not being able to set a traditional limit structure for the central beam due to stroke limitations through the reasonable layout of the buffer device and stop components. The coaxial arrangement of all central axes ensures precise force distribution during collisions. In some solutions, the position sensor is electrically connected to the shaft motion system, which can realize active deceleration and machine stopping intervention after a collision, forming a dual protection of "passive buffering + active intervention", which greatly reduces collision losses and improves the intelligent protection level of the equipment. The structure of each beam equipped with a buffer device can fully cover the collision risk points between beams and between the beam and the end of the bed, without affecting the normal stroke of the beam, ensuring the processing efficiency of the equipment. The overall structure is easy to maintain and highly adaptable, providing comprehensive protection for the safe and efficient operation of the multi-beam laser cutting machine.

[0039] The above description of the disclosed embodiments enables those skilled in the art to implement or use this patent. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of this patent. Therefore, this patent is not to be limited to the embodiments shown herein, but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. A laser cutting machine crossbeam buffer device, comprising a first housing (1) capable of connecting to the machine tool crossbeam, characterized in that, The first housing (1) is provided with a buffer assembly at one or both ends. The buffer assembly includes a central shaft (2). The central shaft (2) is arranged horizontally and movably passes through the end face of the first housing (1). A buffer block (3) is provided at one end of the central shaft (2) located outside the first housing (1). A spring (5) is also sleeved on the central shaft (2). One end of the spring (5) abuts against the buffer block (3), and the other end of the spring (5) abuts against the end face of the first housing (1). A stop block (4) is provided at one end of the central shaft (2) located inside the first housing (1).

2. The laser cutting machine beam buffer device according to claim 1, characterized in that, One side of the first housing (1) is open and a cover plate (8) is detachably installed on the side. The end of the central shaft (2) located inside the first housing (1) is machined with an external thread, and the stop block (4) is threadedly installed on the central shaft (2).

3. The laser cutting machine crossbeam buffer device according to claim 2, characterized in that, Corresponding to the buffer assembly, a baffle (6) is provided inside the first housing (1). The baffle (6) is spaced a certain distance from the end panel of the first housing (1). The central shaft (2) passes through the baffle (6). The stop block (4) abuts against the side of the baffle (6). A square (7) is machined on the outer circumferential surface of the central shaft (2). The square (7) is located between the end panel of the first housing (1) and the baffle (6).

4. The laser cutting machine crossbeam buffer device according to claim 2, characterized in that, The stop block (4) includes a limiting nut (4-1) and a back nut (4-2), with the side of the limiting nut (4-1) in contact with the side of the back nut (4-2).

5. A multi-beam laser cutting machine, comprising a bed (10) on which a plurality of beams (11) are movably mounted, characterized in that, In the direction of movement of the crossbeam (11), a stop assembly is provided at the end of one end of the crossbeam (11), and the ends of the remaining crossbeams (11) are provided with a laser cutting machine crossbeam buffer device as described in any one of claims 1-4. The central axis (2) of the laser cutting machine crossbeam buffer device is arranged along the direction of movement of the crossbeam (11), and multiple central axes (2) are coaxially arranged. In the direction of movement of the crossbeam (11), the buffer block (3) protrudes from the side of the crossbeam (11) and is directly opposite to the stop assembly.

6. The multi-beam laser cutting machine according to claim 5, characterized in that, The first housing (1) is also provided with a position sensor (9), which is used to detect the position of the stop (4). The position sensor (9) is electrically connected to the axial motion system of the laser cutting machine.

7. The multi-beam laser cutting machine according to claim 5, characterized in that, The first housing (1) has a buffer assembly at only one end, and the other end of the first housing (1) is a plane.

8. The multi-beam laser cutting machine according to claim 5, characterized in that, The stop assembly includes a second housing (12), the side of the second housing (12) facing the buffer block (3) being a plane.

9. A multi-beam laser cutting machine, comprising a bed (10) on which a plurality of beams (11) are movably mounted, characterized in that, Each movable crossbeam (11) is provided with a laser cutting machine crossbeam buffer device as described in any one of claims 1-4 at its end. The central axis (2) of the laser cutting machine crossbeam buffer device is arranged along the moving direction of the crossbeam (11), and multiple central axes (2) are arranged coaxially. In the moving direction of the crossbeam (11), the buffer block (3) protrudes from the side of the crossbeam (11). In the moving direction of the crossbeam (11), a stop assembly is provided at one end of the upper surface of the bed (10), and the stop assembly is directly opposite the buffer block (3).

10. The multi-beam laser cutting machine according to claim 9, characterized in that, The stop assembly includes a second housing (12), the side of the second housing (12) facing the buffer block (3) being a plane.

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