A laser cutting device for metal sheets

Abstract

This invention relates to a laser cutting device for metal sheets, comprising a body, a power unit, and a cutting head. A hollow base is mounted on the power unit, and a mounting sleeve extends vertically through the hollow base. Two rollers are located at the lower end of the mounting sleeve, with a drive wheel fixed externally, and internal threads within the sleeve's cavity. A support plate is positioned above the hollow base, with a guide mechanism between them. The support plate and the mounting sleeve are connected via an axial synchronizing element, and a rotary drive mechanism is mounted on the support plate. The cutting head extends vertically through the mounting sleeve, with external threads on its outer side, and an angle limiting mechanism is provided between the cutting head and the hollow base. This laser cutting device for metal sheets features three cutting modes and has a wide range of applications. When cutting flat sheets, it keeps the cutting area flat, improving cutting accuracy and quality. The rollers enable curved surface tracking, allowing for efficient cutting of curved sheets. This laser cutting device for metal sheets has a scientifically sound structure and low manufacturing and operating costs.

Description

Technical Field

[0001] This invention relates to the field of laser cutting technology, and more particularly to a laser cutting device for metal sheets. Background Technology

[0002] In the field of sheet metal cutting, laser cutting equipment holds an important position due to its technological advantages such as high precision, high efficiency, and wide applicability to various materials. However, significant shortcomings still exist in practical applications. On the one hand, when cutting thin sheet metal, the sheet metal is naturally placed on a rack or grid platform, which easily causes curling or edge warping. This deformation leads to cutting path deviation, and the deformed area deviates from the laser focusing plane, causing quality problems such as increased kerf width and edge slag accumulation, affecting cutting accuracy and yield. On the other hand, ordinary laser cutting equipment lacks tracking capability for complex curved surfaces. When cutting corrugated plates, arc plates, and other curved sheet metal, it is difficult to achieve real-time control of the laser focus, thus failing to obtain satisfactory cutting results. Although advanced laser cutting equipment can complete high-quality cutting of curved sheet metal, it relies on a sophisticated and complex control system, positioning system, ranging system, and dedicated curved surface trajectory planning software, resulting in very high manufacturing, operating, and maintenance costs. The system's complexity also leads to significant response delays, necessitating low-speed cutting and low operational efficiency. Summary of the Invention

[0003] To overcome the shortcomings of existing technologies, this invention provides a laser cutting device for metal sheets, which is suitable for cutting both flat and curved sheets. It can achieve good cutting quality and high cutting efficiency. At the same time, the manufacturing and operating costs of this laser cutting device for metal sheets are relatively low, and it is easy to implement and maintain.

[0004] To achieve the above technical objectives, the present invention adopts the following technical solution:

[0005] A laser cutting device for metal sheets includes a body, a power box, and a cutting head. The power box has a hollow base capable of vertical movement, and a mounting sleeve that passes vertically through its interior is mounted on the hollow base. The mounting sleeve and the hollow base are rotatably and slidably fitted. The lower end of the mounting sleeve has two rollers, and a drive wheel is fixed externally. The inner cavity of the mounting sleeve has internal threads. A support plate is located above the hollow base, and a vertically positioned guide mechanism is provided between the hollow base and the support plate. The support plate and the mounting sleeve are connected via an axial synchronizing element. A rotary drive mechanism is mounted on the support plate and is connected to the drive wheel. The cutting head passes vertically through the interior of the mounting sleeve. Its lower end is a nozzle, and its upper end has a connector. The outer side has an external thread that mates with the internal threads in the mounting sleeve. An angle limiting mechanism is provided between the cutting head and the hollow base. Two rollers are symmetrically distributed on both sides of the nozzle, and the rotation axes of the two rollers coincide and intersect perpendicularly with the center line of the nozzle.

[0006] In a preferred embodiment, a crossbeam capable of moving longitudinally along the body is mounted on the body; the power box is mounted on the crossbeam and capable of moving laterally along the body.

[0007] In a preferred embodiment, the guiding mechanism includes two guide posts and two guide sleeves. The two guide posts extend vertically and their lower ends are fixedly connected to the hollow seat. The two guide sleeves are respectively sleeved on the two guide posts and are slidably engaged. The support plate is fixedly connected to the two guide sleeves.

[0008] Furthermore, the angle limiting mechanism includes a limiting part, which is fixed to one side of the cutting head and located above the mounting sleeve; the limiting part can only rotate within the angle range between the two guide posts.

[0009] In a preferred embodiment, the axial synchronizing element includes a collar fixedly connected to the support plate, the collar being fitted onto the mounting sleeve and the two being rotatably engaged.

[0010] In a preferred embodiment, the rotary drive mechanism includes a motor device, the main body of which is mounted on the upper side of the support plate, and an output wheel is fixed on the output shaft of the motor device. The output wheel is located on the lower side of the support plate and is connected to the drive wheel for transmission.

[0011] In a preferred embodiment, the cutting head or mounting sleeve is provided with a counterweight mounting seat, and the counterweight mounting seat is equipped with several detachable counterweights.

[0012] In a preferred embodiment, an auxiliary support rod extending vertically downward is fixedly mounted on the support plate. The auxiliary support rod has threads, and an adjusting nut with threaded engagement is fitted onto the auxiliary support rod. A support sleeve is fixed to one side of the hollow seat. The lower end of the auxiliary support rod passes through the inside of the support sleeve and the two slide together. A spring is fitted over the auxiliary support rod, and the two ends of the spring abut against the adjusting nut and the support sleeve, respectively.

[0013] In a preferred embodiment, the rotation axis of the mounting sleeve coincides with the center line of the nozzle.

[0014] In a preferred embodiment, when the metal sheet laser cutting device performs a cutting operation, the rollers roll along the upper side of the sheet as the power box moves.

[0015] Compared with the prior art, the metal sheet laser cutting device of the present invention has the following beneficial technical effects:

[0016] 1. This metal sheet laser cutting device features three cutting modes: flattening cutting, curved surface cutting, and standard cutting, making it suitable for various cutting conditions and applicable to a wide range of scenarios. When cutting flat sheets, it keeps the cutting area flat, thereby improving cutting accuracy and quality. Through a mechanical structure, it achieves curved surface tracking, enabling high-quality cutting of curved sheets with high efficiency, ease of implementation, and low cost.

[0017] 2. In the structure adopted by this metal sheet laser cutting device, the mounting sleeve is located outside the cutting head, and two rollers are distributed on both sides of the nozzle. The mounting sleeve and rollers can provide good protection for the cutting head, which can prevent damage to the cutting head in the event of a collision, and ensure high operational safety.

[0018] 3. In the structure adopted by this metal sheet laser cutting device, the direction adjustment of the roller and the focal length adjustment of the cutting head are driven and controlled by the same set of rotary drive mechanism, which makes the component utilization rate of this metal sheet laser cutting device high, the structure compact, and further reduces the implementation cost. Attached Figure Description

[0019] To more clearly illustrate the technical solutions of the embodiments of the present invention, the accompanying drawings of the embodiments will be briefly described below. Obviously, the drawings described below only relate to some embodiments of the present invention and are not intended to limit the present invention.

[0020] Figure 1 This is a schematic diagram of the overall structure of the laser cutting device for metal sheets in the embodiment.

[0021] Figure 2 This is a schematic diagram of the assembly structure of the power box, hollow seat, mounting sleeve and cutting head in the embodiment.

[0022] Figure 3 This is a schematic diagram of the mating structure of the hollow seat, mounting sleeve, and cutting head in the embodiment.

[0023] Figure 4 This is a schematic diagram showing a partial cross-section of the hollow seat, mounting sleeve, and cutting head assembly structure in the embodiment.

[0024] Figure 5 This is an exploded view of the structure of the hollow seat, mounting sleeve, and cutting head in the embodiment.

[0025] Figure 6 This is a schematic diagram showing the state when the limiting part abuts against a guide post in the embodiment.

[0026] Figure 7 This is a schematic diagram of the working state of the metal sheet laser cutting device in the flattening cutting mode in the embodiment.

[0027] Figure 8This is a schematic diagram of the working state of the metal sheet laser cutting device in the curved surface cutting mode in the embodiment.

[0028] Figure 9 This is a schematic diagram of the counterweight mounting base and auxiliary support mechanism in the embodiment.

[0029] In the diagram, 1. Machine body, 2. Cutting table, 3. Roller, 4. Hollow seat, 5. Crossbeam, 6. Power box, 7. Wheel frame, 8. Mounting sleeve, 9. Collar, 10. Terminal block, 11. Motor unit, 12. Cutting head, 13. Support plate, 14. Guide column, 15. Guide sleeve, 16. Drive wheel, 17. Transmission belt, 18. Nozzle, 19. Limiting part, 20. Output wheel, 21. External thread part, 22. Counterweight mounting seat, 23. Counterweight, 24. Adjusting nut, 25. Spring, 26. Support sleeve, 27. Auxiliary support rod. Detailed Implementation

[0030] To make the objectives, technical solutions, and advantages of the embodiments of the present invention clearer, the technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some, not all, of the embodiments of the present invention. All other embodiments obtained by those skilled in the art based on the described embodiments of the present invention without creative effort are within the scope of protection of the present invention.

[0031] See Figure 1 , Figure 2 As shown, this embodiment discloses a laser cutting device for metal sheets, including a body 1, a power box 6, and a cutting head 12; the body 1 is equipped with a laser generator and a feed control system, and a cutting table 2 is provided on the upper side of the body 1; the power box 6 is located above the cutting table 2 and can move horizontally by the control system; a hollow base 4 and a linear drive mechanism are installed on the power box 6, and the hollow base 4 and the linear drive mechanism are connected by transmission, so that the hollow base 4 can move up and down by the linear drive mechanism.

[0032] like Figures 2-5As shown, a mounting sleeve 8 is installed on the hollow base 4, passing vertically through its interior. The mounting sleeve 8 is rotatably and slidably engaged with the hollow base 4, allowing the mounting sleeve 8 to rotate freely relative to the hollow base 4 and move up and down within a straight line. Two spaced rollers 3 are mounted on the lower end of the mounting sleeve 8 via a wheel frame 7. Based on this structure, the hollow base 4 can drive the mounting sleeve 8 to move up and down, adjusting the height of the rollers 3. A drive wheel 16 is fixed to the outside of the mounting sleeve 8, with both rotating axes coinciding. The drive wheel 16 is located above the hollow base 4. A support plate 13 is provided above the hollow base 4, and a vertically arranged guide mechanism is provided between the hollow base 4 and the support plate 13, allowing the support plate 13 and the hollow base 4 to move relative to each other only in the vertical direction, but not to rotate relative to each other. The support plate 13 and the mounting sleeve 8 are connected via... The axial synchronization mechanism allows the support plate 13 and the mounting sleeve 8 to rotate relative to each other, but they cannot move relative to each other in the vertical direction. In short, when the mounting sleeve 8 moves up and down, it will drive the support plate 13 to move synchronously. A rotary drive mechanism is fixedly installed on the support plate 13. The rotary drive mechanism is connected to the drive wheel 16 and is used to drive the mounting sleeve 8 to rotate. The rotation angle can be adjusted. Since the rotary drive mechanism is installed on the support plate 13, it can move synchronously up and down with the mounting sleeve 8 to maintain the transmission cooperation. Thus, when the power box 6 moves longitudinally or laterally, the rotary drive mechanism can drive the mounting sleeve 8 to rotate by the corresponding angle, so that the roller 3 and the power box 6 keep in the same direction of travel. The inner cavity of the mounting sleeve 8 is provided with an internal thread, and the center line of the internal thread coincides with the rotation axis of the mounting sleeve 8.

[0033] like Figures 2-5 As shown, the cutting head 12 passes vertically through the inside of the mounting sleeve 8. The nozzle 18 of the cutting head 12 is located below the mounting sleeve 8, and the upper end of the cutting head 12 is located above the mounting sleeve 8 and is provided with a terminal block 10 for connecting optical, pneumatic, and electrical pipeline components. The outer side of the cutting head 12 is provided with an external thread 21, the center lines of which coincide with those of the nozzle 18. The external thread 21 engages with the internal thread in the mounting sleeve 8, allowing the cutting head 12 and the mounting sleeve 8 to rotate relative to each other and move vertically with the relative rotation. Relative movement is generated; based on the above design, the rotation axis of the mounting sleeve 8 coincides with the center line of the nozzle 18, so that the position of the nozzle 18 will not change in the horizontal direction, whether the mounting sleeve 8 rotates alone or rotates synchronously with the cutting head 12; the two rollers 3 are symmetrically distributed on both sides of the nozzle 18, and the rotation axes of the two rollers 3 coincide and intersect perpendicularly with the center line of the nozzle 18; an angle limiting mechanism is provided between the cutting head 12 and the hollow seat 4, so that the cutting head 12 and the hollow seat 4 can only rotate relative to each other within a predetermined angle range.

[0034] Based on the above design, the hollow base 4 can move up and down to adjust the height of the rollers 3. When the rotary drive mechanism drives the mounting sleeve 8 to rotate, the cutting head 12, after being limited by the angle limiting mechanism, will no longer be able to rotate synchronously with the mounting sleeve 8. Under the transmission action of the internal and external threads 21, the cutting head 12 will move up and down with the rotation of the mounting sleeve 8, thereby adjusting the height of the nozzle 18, that is, realizing the control of the laser focus position. During the cutting process, the rotary drive mechanism can drive the mounting sleeve 8 to rotate at a corresponding angle to adjust the direction of the two rollers 3, ensuring that the rollers 3 are in the same direction of travel as the power box 6.

[0035] When this metal sheet laser cutting device is working, the travel direction of the power box 6 is limited to the horizontal and vertical directions. Therefore, the two rollers 3 only need to have a 90-degree directional adjustment function. Since the cutting head 12 and the hollow seat 4 can rotate relative to each other within a predetermined angle range, by reasonably selecting the value of the predetermined angle range, it can be ensured that the cutting head 12 and the mounting sleeve 8 rotate synchronously during the directional adjustment of the two rollers 3, thereby avoiding changes in the height of the nozzle 18. In specific implementation, the value of the predetermined angle range should be minimized as much as possible while satisfying the directional adjustment function of the rollers 3, so as to ensure the connection stability between the cutting head 12 and the pipeline and reduce the implementation difficulty of the pipeline connection.

[0036] This metal sheet laser cutting device has three cutting modes: flattening cutting mode, curved surface cutting mode, and normal cutting mode; specifically:

[0037] See Figure 7 As shown, the flattening cutting mode is suitable for cutting flat plates. During the cutting operation, as the power box 6 moves, the roller 3 rolls along the upper side of the plate. During the cutting process, the roller 3 applies pressure to the raised part of the plate to keep the cut part flat, thereby improving the cutting accuracy and quality. Generally speaking, localized warping occurs more often in the cutting process of thin plates. The roller 3, based on the weight of the mounting sleeve 8, cutting head 12, and rotary drive mechanism, can apply sufficient pressure to the plate to keep it flat. At the same time, during the rolling of the roller 3, the hollow seat 4 can limit the lowest position of the roller 3, thereby avoiding excessive pressure from the roller 3 on the flat part of the plate, which could cause localized dents and deformations.

[0038] See Figure 8As shown, the curved surface cutting mode is suitable for cutting and processing curved materials such as corrugated plates and arc plates. During the cutting operation, as the power box 6 moves, the roller 3 rolls along the upper curved surface of the material, and the cutting head 12 moves up and down synchronously with the roller 3, so that the distance between the nozzle 18 and the upper side of the material tends to be constant, ensuring that the laser can be focused on the upper side of the material according to the preset parameters, thereby ensuring cutting accuracy and quality. Generally speaking, curved materials have good structural strength and can withstand the pressure applied to them by the roller 3, so they will not deform during the cutting process.

[0039] The normal cutting mode works on the same principle as the commonly used laser cutting method. During the cutting operation, roller 3 remains in a raised state and does not come into contact with the material. It is suitable for cutting conventional materials.

[0040] In the structure adopted by this metal sheet laser cutting device, the mounting sleeve 8 is located outside the cutting head 12, and the two rollers 3 are distributed on both sides of the nozzle 18. The mounting sleeve 8 and the rollers 3 can provide good protection for the cutting head 12, preventing damage to the cutting head 12 in the event of a collision. In this metal sheet laser cutting device, the direction adjustment of the rollers 3 and the focal length adjustment of the cutting head 12 are driven and controlled by the same set of rotary drive mechanisms, resulting in high component utilization, compact structure, and low implementation cost.

[0041] like Figure 1 , Figure 2 As shown, in this metal sheet laser cutting device, a crossbeam 5 is installed on the machine body 1. The crossbeam 5 is controlled by the feed control system and can move along the longitudinal direction of the machine body 1. The power box 6 is installed on the crossbeam 5 and is controlled by the feed control system and can move along the transverse direction of the machine body 1. This allows the cutting head 12 to move arbitrarily in a horizontal plane to accommodate more complex cutting operations.

[0042] In this metal sheet laser cutting device, the guiding mechanism has multiple implementations, such as a linear sliding structure formed by the cooperation of a slide rail and a slider; as a preferred implementation:

[0043] See Figure 2 , Figure 3 , Figure 5 As shown, the guiding mechanism includes two guide posts 14 and two guide sleeves 15. The two guide posts 14 extend vertically and their lower ends are fixedly connected to the hollow seat 4. The two guide sleeves 15 are respectively sleeved on the two guide posts 14 and are slidably engaged. The support plate 13 is fixedly connected to the two guide sleeves 15.

[0044] Furthermore, in this metal sheet laser cutting device, the angle limiting mechanism also has multiple implementation methods. For example, a limiting member can be set on the cutting head 12 and the hollow seat 4 respectively, and the two limiting members cooperate to limit the relative rotation of the cutting head 12 and the hollow seat 4. As a preferred implementation method, the angle limiting mechanism and the guiding mechanism are designed in a unified manner to optimize the overall structure. Specifically:

[0045] like Figures 3-6 As shown, with two guide posts 14 provided in the guiding mechanism, the angle limiting mechanism includes a limiting part 19. The limiting part 19 is fixed to one side of the cutting head 12 and located above the mounting sleeve 8. The limiting part 19 can only rotate within the angle range between the two guide posts 14. That is, the limiting part 19 can abut against the corresponding guide post 14 when it rotates in one direction, and then cannot continue to rotate in the original direction.

[0046] See Figures 2-5 As shown, in this metal sheet laser cutting device, the axial synchronization component includes a ring 9, which is fixedly connected to the support plate 13. The ring 9 is sleeved on the mounting sleeve 8 and the two are rotatably engaged. Thus, the ring 9 can move up and down synchronously with the mounting sleeve 8, but will not rotate with the mounting sleeve 8, thereby achieving axial synchronization. At the same time, the ring 9 can provide a certain support for the support plate 13 to improve the working stability of the support plate 13 and the rotary drive mechanism.

[0047] See Figures 2-5 As shown, in this metal sheet laser cutting device, the rotary drive mechanism includes a motor device 11. The main body of the motor device 11 is mounted on the upper side of the support plate 13. An output wheel 20 is fixed on the output shaft of the motor device 11. The output wheel 20 is located on the lower side of the support plate 13. The output wheel 20 can be connected to the drive wheel 16 via a transmission belt 17 or a transmission chain.

[0048] When this metal sheet laser cutting device operates in the flattening cutting mode, the roller 3 applies pressure to the sheet metal based on its own weight, as well as the weight of the mounting sleeve 8, cutting head 12, and rotary drive mechanism. While a lightweight design for these components can reduce the equipment's energy consumption, it will also reduce the pressure that the roller 3 can apply to the sheet metal, making it difficult to guarantee a flattening effect. To overcome this technical problem, the preferred embodiment is as follows:

[0049] See Figure 9As shown, the cutting head 12 or the mounting sleeve 8 is provided with a counterweight mounting base 22, and several detachable counterweights 23 are installed on the counterweight mounting base 22; thus, components such as the roller 3, the mounting sleeve 8, the cutting head 12 and the rotary drive mechanism can be designed to be lightweight. During the cutting operation, the number of counterweights 23 can be adjusted according to actual needs to ensure that the roller 3 can achieve a good flattening effect on the plate and avoid the excessive weight of the components on the upper side of the roller 3, which would significantly increase the operating energy consumption.

[0050] When this metal sheet laser cutting device operates in curved surface cutting mode, the roller 3 moves along the curved surface on the upper side of the sheet. During the up-and-down movement of the roller 3, it needs to overcome its own weight, as well as the weight of the mounting sleeve 8, cutting head 12, and rotary drive mechanism, resulting in significant resistance to the roller 3's movement. This increases the energy consumption of the equipment and can also easily cause deformation of the sheet. To overcome this technical problem, the preferred implementation method is as follows:

[0051] See Figure 9 As shown, an auxiliary support mechanism is installed between the support plate 13 and the hollow seat 4. Specifically, an auxiliary support rod 27 extending vertically downward is fixedly installed on the support plate 13. The auxiliary support rod 27 is threaded, and an adjusting nut 24 with threaded engagement is fitted onto the auxiliary support rod 27. A support sleeve 26 is fixed to one side of the hollow seat 4. The lower end of the auxiliary support rod 27 passes through the inside of the support sleeve 26 and the two are slidably engaged. A spring 25 is fitted over the auxiliary support rod 27. The two ends of the spring 25 abut against the adjusting nut 24 and the support sleeve 26, respectively. Thus, the auxiliary support rod 27, the spring 25, and the support sleeve 26 work together to provide upward auxiliary support for the support plate 13 in the vertical direction, thereby reducing the load on the roller 3, reducing the resistance to movement on the curved surface of the plate, reducing energy consumption, and effectively preventing plate deformation.

[0052] Based on the above structure, by adjusting the position of the adjusting nut 24, the position of the upper end of the spring 25 will change accordingly, and the auxiliary support force provided to the support plate 13 can be adjusted according to the actual situation.

[0053] Although embodiments of the invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the invention, the scope of which is defined by the appended claims and their equivalents.

[0054] Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

Claims

1. A metal plate laser cutting device, comprising a machine body, a power box and a cutting head; characterized in that: The hollow seat is movably arranged on the power box, and a mounting sleeve is arranged in the hollow seat and penetrates the hollow seat in the vertical direction. The mounting sleeve is rotatably and slidably arranged in the hollow seat, so that the mounting sleeve can rotate freely relative to the hollow seat and move up and down in a straight stroke. Two rollers are arranged at the lower end of the mounting sleeve, and an external driving wheel is fixedly arranged outside the two rollers. An internal thread is arranged in the inner cavity of the two rollers. A support plate is arranged above the hollow seat, and a vertical guide mechanism is arranged between the hollow seat and the support plate. The support plate and the mounting sleeve are connected by an axial synchronous element. A rotary driving mechanism is arranged on the support plate and connected with the driving wheel. The cutting head penetrates the mounting sleeve in the vertical direction. A nozzle is arranged at the lower end of the cutting head, and a terminal block is arranged at the upper end of the cutting head. An external thread part is arranged outside the cutting head and matched with the internal thread. An angle limiting mechanism is arranged between the cutting head and the hollow seat. The two rollers are symmetrically arranged at the two sides of the nozzle, and the rotation axes of the two rollers coincide and perpendicularly intersect with the center line of the nozzle. The axial synchronous element comprises a sleeve ring fixedly connected with the support plate, and the sleeve ring is sleeved on the mounting sleeve and rotatably arranged thereon. A counterweight mounting seat is arranged on the cutting head or the mounting sleeve, and a plurality of detachable counterweight elements are arranged on the counterweight mounting seat.

2. The metal sheet laser cutting apparatus according to claim 1, wherein: The beam is movably arranged on the machine body in the longitudinal direction of the machine body. The power box is movably arranged on the beam in the transverse direction of the machine body.

3. The metal plate laser cutting apparatus according to claim 1, wherein: The guide mechanism comprises two guide columns and two guide sleeves. The two guide columns extend vertically and are fixedly connected with the hollow seat at the lower end. The two guide sleeves are sleeved on the two guide columns and slidably arranged thereon. The support plate is fixedly connected with the two guide sleeves.

4. The metal plate laser cutting apparatus according to claim 3, wherein: The angle limiting mechanism comprises a limiting part fixedly arranged on one side of the cutting head and located above the mounting sleeve. The limiting part can only rotate within the angle range between the two guide columns.

5. The metal plate laser cutting apparatus according to claim 1, wherein: The rotary driving mechanism comprises a motor device. The main body part of the motor device is arranged on the upper side of the support plate. An output wheel is fixedly arranged on the output shaft of the motor device. The output wheel is located on the lower side of the support plate and connected with the driving wheel.

6. The metal plate laser cutting apparatus according to claim 1, wherein: A vertical downward extending auxiliary support rod is fixedly arranged on the support plate. The auxiliary support rod is provided with a thread. A threaded adjusting nut is sleeved on the auxiliary support rod. A support sleeve is fixedly arranged on one side of the hollow seat. The lower end of the auxiliary support rod penetrates the support sleeve and is slidably arranged thereon. A spring is sleeved on the auxiliary support rod. The two ends of the spring are respectively abutted with the adjusting nut and the support sleeve.

7. The metal plate laser cutting apparatus according to claim 1, wherein: The rotation axis of the mounting sleeve coincides with the center line of the nozzle.

8. The metal plate laser cutting apparatus according to claim 1, wherein: During the cutting operation, the rollers roll along the upper side of the plate as the power box moves.

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