High-rigidity anti-vibration Z-axis beveling mechanism and laser cutting machine

Abstract

The invention provides a high-rigidity anti-vibration Z-axis beveling mechanism and a laser cutting machine, the high-rigidity anti-vibration Z-axis beveling mechanism comprises a cutting rack, the cutting rack comprises a fixing plate, a guide plate and a reinforcing plate, the fixing plate is arranged in the middle of one side of the guide plate, and the reinforcing plate is fixedly connected with the fixing plate and the guide plate; a sliding box body is arranged on the guide plate in a sliding manner, and an AB-axis device and a laser head are arranged on the sliding box body; the sliding box body comprises a lower end plate, one side of the lower end plate is in sliding connection with the guide plate, the other side of the lower end plate is provided with an annular body with a set length, the axial direction of the annular body is perpendicular to the lower end plate, one end, away from the lower end plate, of the annular body is provided with an upper end plate, and the upper end plate is fixedly connected with an AB shaft device; a laser head is mounted on the AB-axis device; and reinforcing rib plates with different lengths are arranged between the upper part of the annular body and the lower end plate. The problems that an existing laser cutting equipment Z-axis system vibrates under the high-speed working condition, and the machining precision is lowered are solved.

Description

Technical Field

[0001] This invention belongs to the field of laser cutting machine technology, specifically relating to a high-rigidity, vibration-resistant Z-axis beveling mechanism and a laser cutting machine. Background Technology

[0002] The statements in this section are merely background information related to the present invention and do not necessarily constitute prior art.

[0003] Laser cutting machines capable of complex three-dimensional beveling have become key equipment in the processing field. The Z-axis beveling mechanism of such equipment not only needs to support the laser cutting head but also needs to drive it to perform frequent, high-speed, and high-precision reciprocating and complex spatial trajectory movements along the Z-axis during processing to achieve the cutting of the workpiece's three-dimensional contour and high-precision beveling. However, most current Z-axis mechanisms use ball screw pairs, but their installation method is generally "fixed-support." That is, one end of the screw provides axial and radial constraints through a fixed bearing seat, while the other end is supported only by a simple support bearing. This asymmetrical support structure is prone to micron-level radial and axial movement at the support end when subjected to axial impact loads generated by high-speed reversal and lateral torques caused by the cutting head offset, resulting in a reduction in the axial stiffness of the entire transmission chain. The moving part is usually a single thick aluminum plate connected to a slide block via its back, forming a cantilever beam structure. During high-speed start-stop, acceleration and deceleration, and when subjected to eccentric torques generated by changes in the laser head's position, this connecting plate is prone to bending and torsional deformation. This leads to significant vibration in the Z-axis system under high-speed and high-precision machining conditions, as well as increased surface roughness and decreased accuracy of cut perpendicularity and bevel angle. Summary of the Invention

[0004] To address the aforementioned problems, this invention provides a high-rigidity, vibration-resistant Z-axis beveling mechanism and a laser cutting machine, which solves the problem of vibration and decreased processing accuracy of existing laser cutting equipment's Z-axis system under high-speed operating conditions.

[0005] To achieve the above objectives, the present invention is implemented through the following technical solution: In a first aspect, the present invention provides a high-rigidity, vibration-resistant Z-axis beveling mechanism, comprising: a cutting frame, the cutting frame including a fixed plate, a guide plate and a reinforcing plate, the fixed plate being disposed in the middle of one side of the guide plate, and the reinforcing plate being fixedly connected to the fixed plate and the guide plate respectively; a sliding housing is slidably disposed on the guide plate, and an AB axis device and a laser head are disposed on the sliding housing; The sliding housing includes a lower end plate, one side of which is slidably connected to the guide plate, and the other side is provided with an annular body of a predetermined length. The axis of the annular body is perpendicular to the lower end plate. An upper end plate is provided at the end of the annular body away from the lower end plate. The upper end plate is fixedly connected to the AB axis device, and the laser head is mounted on the AB axis device. Reinforcing ribs of different lengths are provided between the upper part of the annular body and the lower end plate.

[0006] As a further implementation, a slide rail is provided between the guide plate and the sliding box. The slide rail is arranged along the length of the guide plate. There are two slide rails, which are respectively distributed on the two sides of the side of the guide plate near the lower end plate. The slide rail is fixedly connected to the lower end plate by fasteners.

[0007] As a further implementation, each of the slide rails is provided with two sliders, and the sliders are provided with an array of mounting holes for fixed connection with the lower end plate by fasteners.

[0008] As a further implementation, a drive mechanism is provided between the two slide rails. The drive mechanism includes a lead screw and a transmission seat mounted on the lead screw. Fixed seats are provided at both ends of the lead screw. A bearing is provided between the lead screw and the fixed seat. The fixed seat is fixedly connected to the guide plate by fasteners.

[0009] As a further implementation, the transmission seat is mounted on the lead screw via a lead screw nut, and the movement of the transmission seat is achieved by the lead screw nut; the transmission seat is fixedly connected to the lower end plate by fasteners.

[0010] As a further implementation, a motor mounting bracket is provided on the guide plate at the end of the lead screw by fasteners, and a servo motor is provided on the motor mounting bracket. The servo motor is connected to the end of the lead screw by a coupling.

[0011] As a further implementation, there are three reinforcing ribs, namely a first reinforcing rib, a second reinforcing rib, and a third reinforcing rib. The first reinforcing rib and the third reinforcing rib are disposed on both sides of the upper end of the annular body, and the second reinforcing rib is disposed in the middle of the upper end of the annular body.

[0012] As a further implementation, the first reinforcing rib and the third reinforcing rib have the same length, and the second reinforcing rib has a shorter length than the first reinforcing rib.

[0013] As a further implementation, the fixing plate, guide plate and reinforcing plate are welded together as a single unit by aluminum plates; the lower end plate, the annular body and the upper short plate are all made of aluminum plates.

[0014] Secondly, the present invention also provides a laser cutting machine, the laser cutting machine including the high-rigidity, vibration-resistant laser cutting machine Z-axis beveling mechanism.

[0015] Compared with the prior art, the advantages and positive effects of this invention are: This invention involves a sliding housing mounted on a guide plate, with an AB axis device and a laser head mounted on the sliding housing. One side of the lower end plate of the sliding housing is slidably connected to the guide plate, while the other side has an annular body. The axis of the annular body is perpendicular to the lower end plate. The annular body bears the bending moment and torque generated on the upper end plate by the lateral forces from the AB axis and the laser head during cutting. The annular body is designed as a large-diameter tubular structure. By utilizing the principle that arranging the material as far away from the neutral axis as possible while maintaining the same cross-sectional area can greatly increase the moment of inertia and section modulus of the cross-section, a significant reduction in deformation is achieved under the same bending moment. This invention effectively improves the execution error of the end effector. An upper end plate is provided at the end of the annular body away from the lower end plate, and the upper end plate is fixedly connected to the AB axis device, on which a laser head is mounted. Reinforcing ribs of different lengths are provided between the upper and lower end plates of the annular body to further ensure its load-bearing capacity. This invention forms a highly efficient load-bearing frame through the combination of large-diameter, thin-walled circular boxes, solving the problem of traditional cantilever or sliding plate structures being too heavy, increasing drive load and energy consumption. The load-bearing frame avoids processing errors caused by minor deformations of the end effector during high-speed, high-precision laser cutting.

[0016] This invention utilizes a lead screw and a transmission seat mounted on the lead screw, positioned between two slide rails. Fixed seats are located at both ends of the lead screw, with bearings connecting the lead screw to the fixed seats. The fixed seats are securely connected to a guide plate via fasteners. The transmission seat is mounted on the lead screw via a lead screw nut, enabling its movement. The transmission seat is also securely connected to a lower end plate via fasteners. The fixed seats at both ends of the lead screw create a fixed-end support system, preventing axial backlash and radial deflection issues caused by one end of the lead screw being free. This eliminates axial backlash at the support end and improves the axial stiffness of the lead screw. Higher axial stiffness means less compression / elongation deformation of the lead screw under axial loads, thus suppressing vibrations induced by elastic deformation of the transmission system at the source. This improves the system's dynamic response, positioning accuracy, and stability. Simultaneously, the large-diameter thin-walled circular box-shaped support frame achieves a double increase in rigidity, which significantly improves the natural frequency of the entire Z-axis system. This effectively avoids the common working vibration frequency range, thereby achieving high-speed, stable, and low-vibration operation. The increase in rigidity directly translates into higher positioning accuracy, repeatability, and better cutting surface quality, making it particularly suitable for high-precision three-dimensional bevel cutting. Attached Figure Description

[0017] The accompanying drawings, which form part of this invention, are used to provide a further understanding of the invention. The illustrative embodiments of the invention and their descriptions are used to explain the invention and do not constitute an improper limitation of the invention.

[0018] Figure 1 This is a schematic diagram of the overall structure of the Z-axis beveling mechanism of the laser cutting machine of the present invention; Figure 2 This is a schematic diagram of the cutting frame structure of the present invention; Figure 3 This is a schematic diagram of the cutting frame and sliding box structure of the present invention; Figure 4 This is a schematic diagram of the sliding box structure of the present invention; Figure 5 This is a cross-sectional view of the sliding box structure of the present invention.

[0019] In the diagram: 1. Cutting frame; 2. Servo motor; 3. Motor mounting base; 4. Lead screw; 5. Mounting base; 6. Slide rail; 7. Slider; 8. AB axis assembly; 9. Transmission base; 10. Lead screw nut; 11. Sliding housing; 12. Lower end plate; 13. First reinforcing rib; 14. Second reinforcing rib; 15. Third reinforcing rib; 16. Ring-shaped body; 17. Upper end plate. Detailed Implementation

[0020] It should be noted that the following detailed description is illustrative and intended to provide further explanation of the invention. Unless otherwise specified, all technical and scientific terms used in this invention have the same meaning as commonly understood by one of ordinary skill in the art to which this invention pertains.

[0021] It should be noted that the terminology used herein is for the purpose of describing particular embodiments only and is not intended to limit the scope of exemplary embodiments according to the invention. As used herein, unless otherwise expressly indicated by the invention, the singular form is also intended to include the plural form. Furthermore, it should be understood that when the terms "comprising" and / or "including" are used in this specification, they indicate the presence of features, steps, operations, devices, components, and / or combinations thereof. Example 1 This embodiment provides a high-rigidity, vibration-resistant Z-axis beveling mechanism, such as... Figures 1-5As shown, the device includes: a cutting frame 1, which comprises a fixed plate, a guide plate, and a reinforcing plate. The fixed plate is located in the middle of one side of the guide plate and serves to support the entire cutting frame 1. The guide plate provides a high-precision, high-rigidity mounting surface for the linear motion of the sliding housing 11. The reinforcing plate is fixedly connected to the fixed plate and the guide plate respectively, forming a stable triangular support structure to prevent the guide plate from bending or twisting under stress. The sliding housing 11 is slidably mounted on the guide plate, and the sliding housing 11 is equipped with an AB axis device 8 and a laser head. The sliding housing 11 includes a lower end plate 12, one side of which is slidably connected to the guide plate, and the other side is provided with an annular body 16 of a set length. The axial direction of the annular body 16 is perpendicular to the guide plate. The lower end plate 12 is arranged such that the annular body 16 bears the bending moment and torque generated on the upper end plate 17 by the lateral forces from the AB axis and the laser head during cutting. The annular body 16 is a large-diameter tubular structure. By utilizing the principle that arranging the material as far away from the neutral axis as possible when the cross-sectional area is the same, the moment of inertia and section modulus of the cross section can be greatly improved, thus significantly reducing the deformation under the same bending moment and effectively improving the execution error of the end effector. The upper end plate 17 is provided at the end of the annular body 16 away from the lower end plate 12. The upper end plate 17 is fixedly connected to the AB axis device 8, and the laser head is installed on the AB axis device 8. Reinforcing ribs of different lengths are provided between the upper part of the annular body 16 and the lower end plate 12. The combination of large-diameter thin-walled circular boxes forms a highly efficient load-bearing frame, which solves the problem that the traditional cantilever or sliding plate structure is relatively thick and heavy, increasing the driving load and energy consumption. Through the load-bearing frame, the small deformation of the end effector that leads to processing errors is avoided in high-speed, high-precision laser cutting.

[0022] As a further implementation, a slide rail 6 is provided between the guide plate and the sliding housing 11. The slide rail 6 is arranged along the length of the guide plate, and there are two slide rails 6, respectively distributed on the two side edges of the guide plate near the lower end plate 12. The slide rail 6 is fixedly connected to the lower end plate 12 by fasteners. Each slide rail 6 is provided with two sliders 7, and the sliders 7 are provided with an array of mounting holes for fixed connection to the lower end plate 12 by fasteners. The four-point support of the double guide rails and the two sliders 7 on each guide rail forms a stable rectangular support structure, which improves the system's anti-overturning ability and rigidity when subjected to eccentric loads and moment loads, and prevents jamming. The use of sliders 7 ensures low and uniform friction, ensuring smooth movement and low-speed stability.

[0023] As a further implementation, a drive mechanism is provided between the two slide rails 6. The drive mechanism includes a lead screw and a transmission seat 9 mounted on the lead screw. Fixed seats 5 are provided at both ends of the lead screw, and bearings are provided between the lead screw and the fixed seats 5. The fixed seats 5 are fixedly connected to the guide plate by fasteners. The transmission seat 9 is mounted on the lead screw via a lead screw nut 10, which enables the movement of the transmission seat 9. The transmission seat 9 is fixedly connected to the lower end plate 12 by fasteners. The lead screw pair precisely converts the rotational motion of the servo motor 2 into the linear motion of the transmission seat 9. The servo motor 2 provides precise speed, position, and torque control. By providing fixed seats 5 at both ends of the lead screw, a fixed-end support is formed, avoiding the problems of axial backlash and radial deflection caused by one end of the lead screw being free. This eliminates the axial backlash at the support end and improves the axial stiffness of the lead screw. Higher axial stiffness means that the compression / elongation deformation of the lead screw is smaller when subjected to axial load, thereby suppressing vibrations induced by elastic deformation of the transmission system from the source. This improves the system's dynamic response, positioning accuracy, and stability. Simultaneously, the large-diameter, thin-walled circular box-shaped support frame achieves a dual increase in rigidity, significantly raising the natural frequency of the entire Z-axis system. This effectively avoids common operating vibration frequency ranges, enabling high-speed, stable, and low-vibration operation. The increased rigidity directly translates into higher positioning accuracy, repeatability, and superior cutting surface quality, making it particularly suitable for high-precision three-dimensional beveling.

[0024] As a further implementation, a motor mounting base 53 is provided on the guide plate at the end of the lead screw via fasteners. A servo motor 2 is mounted on the motor mounting base 53, and the servo motor 2 is connected to the end of the lead screw via a coupling. This fastener connection allows the servo motor 2, the coupling, and even the entire motor mounting base 53 assembly to be independently disassembled, maintained, or replaced as a module, without having to disassemble the entire precision guide rail and lead screw system. This also avoids a large coaxiality error between the motor drive shaft and the lead screw, which could affect the working accuracy of the lead screw fixed at both ends.

[0025] As a further implementation, there are three reinforcing ribs: a first reinforcing rib 13, a second reinforcing rib 14, and a third reinforcing rib 15. The first reinforcing rib 13 and the third reinforcing rib 15 are disposed on both sides of the upper end of the annular body 16, and the second reinforcing rib 14 is disposed in the middle of the upper end of the annular body 16. The first reinforcing rib 13 and the third reinforcing rib 15 have the same length, and the length of the second reinforcing rib 14 is less than the length of the first reinforcing rib 13. By distributing the reinforcing ribs, bending or torsional stresses from different directions can be effectively resisted, preventing deformation of the upper end of the annular body 16.

[0026] The fixed plate, guide plate, and reinforcing plate are welded together as a single unit using aluminum plates. The guide plate and fixed plate are also welded together, ensuring that the position of the guide surface remains constant relative to the installation and fixing reference. The lower end plate 12, annular body 16, and upper short plate are all made of aluminum plates. The use of aluminum plates in the fixed plate, guide plate, reinforcing plate, lower end plate 12, annular body 16, and upper short plate, with aluminum having a significantly lower density than metals such as steel, makes the entire assembly lighter and more conducive to the execution accuracy of the end effector.

[0027] Example 2 This embodiment provides a laser cutting machine, which includes the high-rigidity, vibration-resistant Z-axis beveling mechanism of the laser cutting machine.

[0028] While the specific embodiments of the present invention have been described above in conjunction with the accompanying drawings, this is not intended to limit the scope of protection of the present invention. Those skilled in the art should understand that various modifications or variations that can be made by those skilled in the art without creative effort based on the technical solutions of the present invention are still within the scope of protection of the present invention.

Claims

1. A high-rigidity, vibration-resistant Z-axis beveling mechanism, characterized in that, The utility model relates to a laser cutting machine Z axis bevel mechanism with high rigidity and vibration resistance, which comprises a cutting frame, a sliding box body, an AB shaft device and a laser head. The cutting frame comprises a fixed plate, a guide plate and a reinforcing plate. The fixed plate is arranged in the middle of one side of the guide plate, and the reinforcing plate is fixedly connected with the fixed plate and the guide plate respectively.

2. A high rigidity anti-vibration Z-axis bevel gear mechanism according to claim 1, characterized in that, The sliding box body is slidably arranged on the guide plate.

3. A high rigidity anti-vibration Z-axis bevel gear mechanism according to claim 2, wherein The sliding box body comprises a lower end plate, an annular body with a set length, and an upper end plate.

4. A high rigidity anti-vibration Z-axis bevel gear mechanism according to claim 3, wherein The lower end plate is slidably connected with the guide plate on one side, and the annular body is arranged perpendicularly to the lower end plate on the other side.

5. A high rigidity anti-vibration Z-axis bevel gear mechanism according to claim 4, wherein The upper end plate is fixedly connected with the AB shaft device.

6. A high rigidity anti-vibration Z-axis bevel gear mechanism according to claim 5, wherein The AB shaft device is provided with the laser head.

7. A high rigidity anti-vibration Z-axis bevel gear mechanism according to claim 1, wherein The annular body is provided with reinforcing rib plates with different lengths between the upper side and the lower end plate.

8. A high rigidity anti-vibration Z-axis bevel gear mechanism according to claim 7, wherein The guide plate and the sliding box body are provided with sliding rails.

9. A high rigidity anti-vibration Z-axis bevel gear mechanism according to claim 1, wherein The sliding rails are arranged along the length direction of the guide plate.

10. A laser cutting machine characterized by, The sliding rails are fixedly connected with the lower end plate by fasteners. Each sliding rail is provided with two sliding blocks. The sliding blocks are provided with an array of mounting holes. The sliding blocks are fixedly connected with the lower end plate by fasteners. The driving mechanism comprises a lead screw and a transmission seat arranged on the lead screw. The lead screw is provided with a fixed seat at both ends. The fixed seat is fixedly connected with the guide plate by fasteners. The transmission seat is installed on the lead screw by a lead screw nut. The transmission seat is fixedly connected with the lower end plate by fasteners. The guide plate at the end of the lead screw is provided with a motor fixed seat by fasteners. The motor fixed seat is provided with a servo motor. The servo motor is connected with the end of the lead screw by a shaft coupling. The reinforcing rib plates are three in number, namely a first reinforcing rib plate, a second reinforcing rib plate and a third reinforcing rib plate. The first reinforcing rib plate and the third reinforcing rib plate are arranged on both sides of the upper end of the annular body. The second reinforcing rib plate is arranged in the middle of the upper end of the annular body. The first reinforcing rib plate and the third reinforcing rib plate have the same length. The length of the second reinforcing rib plate is less than that of the first reinforcing rib plate. The fixed plate, the guide plate and the reinforcing plate are integrally connected by aluminum plate welding. The lower end plate, the annular body and the upper short plate are made of aluminum plate. The laser cutting machine comprises the laser cutting machine Z axis bevel mechanism with high rigidity and vibration resistance according to any one of claims 1-9.

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