A plasma cutting machine

Abstract

The utility model relates to heating cutting technical field especially, it is a kind of plasma cutting machine, specifically includes: the bottom of workbench is provided with support frame, the both sides of workbench along its length direction are provided with fixed plate, rotatable first lead screw is provided between two fixed plates, one end of first lead screw passes through fixed plate and is connected with the rotating shaft of first motor, first motor is set on the outer side wall of fixed plate, first sliding block is set on first lead screw, connecting plate is set on first sliding block, base is set in connecting plate top, the top of base is provided with cylinder, the telescopic end of cylinder passes through base and is connected with cutting torch, protection assembly is slidably connected with sliding seat through drive block, sliding seat is connected with base, adjusting assembly is set on base, adjusting assembly is connected with drive block. Solveed the problem that high-temperature molten metal particles are extremely easy to cause scald to operator in splashing process, it is also possible to ignite surrounding combustible, causes fire accident.

Description

Technical Field

[0001] This utility model relates to the field of heating and cutting technology, and in particular to a plasma cutting machine. Background Technology

[0002] A plasma cutting machine is a modern processing device that uses a high-temperature and high-speed plasma arc as a heat source to melt and remove conductive metal materials. Its principle is to ionize compressed gas to form a highly concentrated plasma arc, which instantly and locally melts the metal, thus creating a cutting kerf.

[0003] Nowadays, most plasma cutting machines generate sparks when cutting metal sheets, as the high-speed plasma flow disperses tiny molten metal particles. This is an inherent phenomenon in the plasma cutting process and cannot be completely avoided. However, these high-temperature molten metal particles are extremely dangerous during the splashing process. They can easily cause burns to operators and may also ignite surrounding combustibles, leading to fires.

[0004] Therefore, how to provide a plasma cutting machine that limits the splash path of high-temperature molten metal particles when cutting metal sheets, ensures the safety of operators, and prevents fire accidents is an urgent technical problem to be solved. Summary of the Invention

[0005] This invention provides a plasma cutting machine that solves the problem that high-temperature molten metal particles can easily cause burns to operators during the splashing process, and may also ignite surrounding combustibles, causing fire accidents.

[0006] This utility model provides a plasma cutting machine, including: a worktable, a support frame at the bottom of the worktable, fixed plates on both sides of the worktable along its length, a first lead screw rotatably disposed between the two fixed plates, one end of the first lead screw passing through the fixed plate and connected to the rotating shaft of a first motor, the first motor being disposed on the outer wall of the fixed plate, a first sliding block disposed on the first lead screw, a connecting plate disposed on the first sliding block, a base disposed at the top of the connecting plate, a cylinder disposed at the top of the base, and the telescopic end of the cylinder passing through the base and connected to the cutting torch; A protective component is provided, wherein the protective component is slidably connected to a sliding seat via a driving block, the sliding seat is connected to a base, and an adjustment component is provided on the base. The adjustment component is connected to the driving block and is used to drive the driving block to slide on the sliding seat, thereby controlling the unfolding and retraction of the protective component.

[0007] In one possible implementation, the protective assembly includes a roller shutter and a bracket, the roller shutter being wound around the rotating shaft of the bracket, a second motor being provided on the side wall of the bracket, the rotating shaft of the second motor being connected to the rotating shaft, and multiple brackets being evenly distributed along the side wall of the drive block.

[0008] In one possible implementation, two guide blocks are symmetrically arranged on both sides of the bracket, and guide grooves are provided on the opposite sidewalls of the two guide blocks.

[0009] In one possible implementation, a flexible sealing strip is provided at the bottom end of the roller shutter, and a counterweight is provided at the bottom end of the flexible sealing strip.

[0010] In one possible implementation, a baffle is slidably provided at the bottom end of the connecting plate, the bottom end of the connecting plate has an opening groove, a sliding groove is provided on the side wall opposite to the opening groove, a slider is provided on the side wall opposite to the baffle, and the baffle is slidably connected to the connecting plate through the slider.

[0011] In one possible implementation, a flexible dustproof strip is provided at the side wall opening of the drive block.

[0012] In one possible implementation, the adjustment assembly includes a third motor and a connecting rod, the third motor being mounted on the base, the rotation shaft of the third motor being connected to one end of the connecting rod, and the other end of the connecting rod being hinged to the drive block.

[0013] In one possible implementation, a protective cover is fitted onto the side wall of the cutting torch near its lower end.

[0014] In one possible implementation, the cutting torch is detachably mounted on a mounting plate, the mounting plate is connected to the telescopic end of the cylinder, a guide block is provided on the side wall of the mounting plate away from the cutting torch, a guide rod is provided on the connecting plate, and the guide block slides on the guide rod.

[0015] In one possible implementation, the worktable is provided with a second lead screw that can be rotatably mounted on both sides along its length. The two second lead screws are respectively connected to a fourth motor and a fifth motor. Each of the two second lead screws is provided with a second sliding block, and the second sliding block is connected to the side wall of the fixed plate.

[0016] The beneficial effects of this utility model are as follows: First, the first motor drives the first lead screw to rotate, causing the first sliding block to move between two fixed plates. The connecting plate moves synchronously, thereby adjusting the lateral position of the cutting torch on the worktable. Subsequently, the telescopic end of the cylinder at the top of the base extends and retracts to adjust the distance between the cutting torch and the workpiece on the worktable. When the protective assembly needs to be deployed, the adjusting component on the base is controlled to move the driving block on the sliding seat, and the protective assembly moves synchronously. The protective assembly moves to the working area of ​​the cutting workpiece, and the cooperation between the protective assembly and the connecting plate encloses the working area of ​​the cutting workpiece. When the protective assembly needs to be retracted, the adjusting component on the base is controlled to move the driving block in the opposite direction on the sliding seat, and the protective assembly moves synchronously, moving away from the working area of ​​the cutting workpiece, thus releasing the enclosed state of the working area of ​​the cutting workpiece. Through the cooperation between the protective assembly and the connecting plate, the working area of ​​the cutting workpiece is enclosed, limiting the splash path of high-temperature molten metal particles. This solves the problem that high-temperature molten metal particles can easily cause burns to operators during splashing and may also ignite surrounding combustibles, causing fire accidents. Attached Figure Description

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

[0018] Figure 1 This is a perspective view of a plasma cutting machine according to the present invention; Figure 2 This is a front view of a plasma cutting machine according to the present invention; Figure 3 This is a perspective view of the connection plate and adjustment assembly of a plasma cutting machine according to the present invention. Figure 4 This is a perspective view of the connection plate and cutting torch of a plasma cutting machine according to the present invention. Figure 5 This is a cross-sectional perspective view of the connecting plate of a plasma cutting machine according to the present invention; Figure 6 This is a perspective view of the sliding base and protective components of a plasma cutting machine according to the present invention. Figure 7 This is a cross-sectional perspective view of a protective component for a plasma cutting machine according to the present invention.

[0019] Explanation of reference numerals in the attached figures: 1. Workbench; 2. Support frame; 3. Fixing plate; 4. First lead screw; 5. First motor; 6. First sliding block; 7. Connecting plate; 8. Protective assembly; 801. Roller shutter; 802. Bracket; 9. Adjustment assembly; 901. Third motor; 902. Connecting rod; 10. Base; 11. Cylinder; 12. Cutting torch; 13. Drive block; 14. Sliding seat; 15. Second motor; 16. Guide block; 17. Guide groove; 18. Flexible sealing strip; 19. Counterweight; 20. Baffle; 21. Opening groove; 22. Slide groove; 23. Slider; 24. Flexible dustproof strip; 25. Protective cover; 26. Mounting plate; 27. Guide block; 28. Guide rod; 29. ​​Second lead screw; 30. Fourth motor; 31. Fifth motor; 32. Second sliding block; 33. Limit block; 34. Limit rod. Detailed Implementation

[0020] The technical solution of this utility model will be clearly and completely described below with reference to the embodiments. Obviously, the described embodiments are only some embodiments of this utility model, not all embodiments. Based on the embodiments of this utility model, all other embodiments obtained by those skilled in the art without creative effort are within the protection scope of this utility model.

[0021] In the description of this utility model, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", and "counterclockwise" 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 utility model 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 utility model.

[0022] In the description of this utility model, it should be understood that the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of indicated technical features. Therefore, a feature defined as "first" and "second" may explicitly or implicitly include one or more of the stated features. In the description of this utility model, "a plurality of" means two or more, unless otherwise explicitly specified. Furthermore, the terms "installed," "connected," and "linked" 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 utility model based on the specific circumstances.

[0023] See Figure 1 , Figure 2 and Figure 6 This utility model provides a plasma cutting machine, including: a worktable 1, a support frame 2 at the bottom of the worktable 1, fixed plates 3 on both sides of the worktable 1 along its length, a first lead screw 4 rotatably arranged between the two fixed plates 3, one end of the first lead screw 4 passing through the fixed plate 3 and connected to the rotating shaft of the first motor 5, the first motor 5 being arranged on the outer wall of the fixed plate 3, a first sliding block 6 being arranged on the first lead screw 4, a connecting plate 7 being arranged on the first sliding block 6, a base 10 being arranged at the top of the connecting plate 7, a cylinder 11 being arranged at the top of the base 10, the telescopic end of the cylinder 11 passing through the base 10 and connected to the cutting torch 12, a protective component 8, the protective component 8 being slidably connected to a sliding seat 14 via a drive block 13, the sliding seat 14 being connected to the base 10, an adjustment component 9 being arranged on the base 10, the adjustment component 9 being connected to the drive block 13, the adjustment component 9 being used to drive the drive block 13 to slide on the sliding seat 14, thereby controlling the unfolding and retraction of the protective component 8.

[0024] The sliding seat 14 has a circular ring structure with annular grooves at both its top and bottom. The driving block 13 has a semi-circular ring structure with annular grooves inside. Annular protrusions are provided at the top and bottom of the annular grooves, matching the annular grooves. This ensures smoother rotation of the driving block 13 on the sliding seat 14 when driven by the adjusting component 9. Because the cutting torch 12 is located on one side of the connecting plate 7, when the driving block 13 rotates to the same side as the cutting torch 12, the protective component 8 on the driving block 13 and the connecting plate 7 together enclose the cutting torch 12, blocking the working area where the torch 12 cuts the workpiece and limiting the splash path of high-temperature molten metal particles. When the protective component 8 and the cutting torch 12 are on the same side of the connecting plate 7, the protective component 8 is in an unfolded state; when the protective component 8 and the cutting torch 12 are on the same side of the connecting plate 7, the protective component 8 is in a retracted state.

[0025] Specifically, firstly, the first motor 5 drives the first lead screw 4 to rotate, causing the first sliding block 6 to move between the two fixed plates 3. The connecting plate 7 moves synchronously, thereby adjusting the lateral position of the cutting torch 12 on the base 10 above the worktable 1. Subsequently, the telescopic end of the cylinder 11 at the top of the base 10 extends and retracts to adjust the distance between the cutting torch 12 and the workpiece on the worktable 1. When it is necessary to unfold the protective assembly 8, the adjusting assembly 9 on the base 10 is controlled to move the driving block 13 on the sliding seat 14. The protective assembly 8 moves synchronously and moves to the working area of ​​the cutting workpiece. The protective assembly 8, in cooperation with the connecting plate 7, encloses the working area of ​​the cutting workpiece. When it is necessary to retract the protective assembly 8, the adjusting assembly 9 on the base 10 is controlled to move the driving block 13 in the opposite direction on the sliding seat 14. The protective assembly 8 moves synchronously and moves away from the working area of ​​the cutting workpiece, releasing the enclosed state of the working area of ​​the cutting workpiece.

[0026] Preferably, a limiting rod 34 is provided between the two fixed plates 3, and a limiting block 33 is provided on the side wall of the connecting plate 7, positioned above the first slider 23. The connecting plate 7 is driven by the first motor 5. When the first slider 6 moves on the first lead screw 4, the limiting block 33 slides on the limiting rod 34, improving the stability of the connecting plate 7 during movement.

[0027] See Figure 7 In some embodiments, the protective component 8 includes a roller shutter 801 and a bracket 802. The roller shutter 801 is wound around the rotating shaft of the bracket 802. A second motor 15 is provided on the side wall of the bracket 802. The rotating shaft of the second motor 15 is connected to the rotating shaft. There are multiple brackets 802, and the multiple brackets 802 are evenly distributed along the side wall of the drive block 13.

[0028] The second motor 15 rotates, driving the shaft on the support 802 to rotate, causing the roller shutter 801 wound on the shaft to unfold or retract. Multiple supports 802 are evenly arranged along the side wall of the drive block 13, working together to form a continuous protective surface. When the cutting torch 12 moves to the required area, the roller shutter 801 lowers to shield the work area of ​​the workpiece being cut. After cutting is completed, the roller shutter 801 retracts and returns to its original position. This isolation of the work area of ​​the workpiece being cut limits the splashing of high-temperature molten metal particles and the accompanying intense light, while maintaining a compact equipment layout.

[0029] In some embodiments, two guide blocks 16 are symmetrically arranged on both sides of the bracket 802, and guide grooves 17 are provided on the opposite sidewalls of the two guide blocks 16.

[0030] During the opening and closing process, the two side edges of the roller blind 801 are embedded in the guide grooves 17 of the guide block 16. The guide grooves 17 constrain the running trajectory of the roller blind 801, preventing the roller blind 801 from shifting laterally, wrinkling or derailing when opening or closing. This ensures that the roller blind 801 is subjected to balanced force, and can maintain a vertically stable state, especially when opening and closing or when subjected to airflow disturbances and the impact of splashing high-temperature molten metal particles.

[0031] It should be noted that the two adjacent guide blocks 16 fit tightly together, which increases the lateral sealing of the protective component 8 when it surrounds the working area of ​​the cut workpiece.

[0032] In some embodiments, a flexible sealing strip 18 is provided at the bottom end of the roller shutter 801, and a counterweight 19 is provided at the bottom end of the flexible sealing strip 18.

[0033] The flexible sealing strip 18 hangs down naturally due to its own elasticity and the gravity of the counterweight 19, closely adhering to the workbench 1 or the surface of the workpiece, forming a physical barrier to block the splashing of high-temperature molten metal particles and strong light. The counterweight 19 enhances the tension of the roller shutter 801, preventing the roller shutter 801 from swaying due to airflow disturbances and the impact of splashing high-temperature molten metal particles.

[0034] See Figure 5 In some embodiments, a baffle 20 is slidably provided at the bottom end of the connecting plate 7, the bottom end of the connecting plate 7 has an opening groove 21, a sliding groove 22 is provided on the side wall opposite to the opening groove 21, and a slider 23 is provided on the side wall opposite to the baffle 20. The baffle 20 is slidably connected to the connecting plate 7 through the slider 23.

[0035] The baffle 20 is embedded in the groove 22 in the opening groove 21 at the bottom of the connecting plate 7 by its side wall slider 23, and can slide back and forth along the groove. The extension length of the baffle 20 in the opening groove 21 can be adjusted according to the specific cutting path of the workpiece, and it is locked by bolts. The bolts are rotatably set on the side wall of the connecting plate 7. When the bolts are tightened, one end of the bolt will pass through the opening groove 21 to abut and fix the baffle 20.

[0036] See Figure 6 In some embodiments, a flexible dustproof strip 24 is provided at the side wall opening of the drive block 13.

[0037] The flexible dustproof strip 24 always fits against the outer surface of the sliding seat 14 when the drive block 13 slides on the sliding seat 14, sealing the gap between the two and preventing the entry of pollutants such as metal dust.

[0038] See Figure 3In some embodiments, the adjustment component 9 includes a third motor 901 and a connecting rod 902. The third motor 901 is mounted on the base 10. The rotation shaft of the third motor 901 is connected to one end of the connecting rod 902, and the other end of the connecting rod 902 is hinged to the drive block 13.

[0039] When the third motor 901 rotates, it drives the connecting rod 902 to swing. The connecting rod 902 converts the rotational motion into the circumferential sliding of the drive block 13 on the sliding seat 14, thereby adjusting the relative position of the protective component 8 and the connecting plate 7, and thus changing the unfolded and retracted state of the protective component 8.

[0040] In some embodiments, a protective cover 25 is fitted onto the side wall of the cutting torch 12 near its lower end.

[0041] The protective cover 25, which is fitted onto the lower side wall of the cutting torch 12, continuously surrounds the arc area during the cutting process, isolates strong ultraviolet radiation, protects the cutting torch 12 from heat radiation damage, and extends the service life of the cutting torch 12.

[0042] See Figure 4 In some embodiments, the cutting torch 12 is detachably mounted on the mounting plate 26, which is connected to the telescopic end of the cylinder 11. A guide block 27 is provided on the side wall of the mounting plate 26 away from the cutting torch 12, and a guide rod 28 is provided on the connecting plate 7. The guide block 27 slides on the guide rod 28.

[0043] The cutting torch 12 is mounted on the mounting plate 26 via a quick-release structure. When the cylinder 11 is raised or lowered, the mounting plate 26 drives the cutting torch 12 to move vertically in sync. At the same time, the guide block 27 on the side wall of the mounting plate 26 slides along the guide rod 28 on the connecting plate 7, constraining the cutting torch 12 to only make vertical movements, preventing the cutting torch 12 from swinging or tilting, and ensuring the stability of the cutting angle.

[0044] In some embodiments, the worktable 1 is provided with a second lead screw 29 that can be rotatably mounted on both sides along its length direction. The two second lead screws 29 are respectively connected to the fourth motor 30 and the fifth motor 31. Each of the two second lead screws 29 is provided with a second sliding block 32, which is connected to the side wall of the fixed plate 3.

[0045] Among them, the fourth motor 30 and the fifth motor 31 independently drive the second lead screw 29 on both sides of the worktable 1 to rotate, thereby driving their respective second sliding blocks 32 to move along the lead screw axis, and then pushing the fixed plate 3 connected to it to move along the length direction of the worktable 1, thereby adjusting the longitudinal position of the cutting torch 12 on the worktable 1.

[0046] It should be noted that the second motor 15 is smaller than the other motors and is a micro motor. The first motor 5, the second motor 15, the third motor 901, the fourth motor 30, the fifth motor 31 and the cylinder 11 mentioned above are all parts known to those skilled in the art, so their working principles and operating procedures will not be described in detail here. For ease of viewing, the threads of the first lead screw 4 and the second lead screw 29 are omitted in the attached drawings.

[0047] Work process First, the second lead screws 29 on both sides of the worktable 1 are driven to rotate by the fourth motor 30 and the fifth motor 31, respectively, which in turn moves the second sliding block 32, thereby adjusting the longitudinal position of the two fixed plates 3 on the worktable 1. Then, the first motor 5 rotates, driving the first lead screw 4 to rotate, causing the first sliding block 6 to move along the first lead screw 4, and the limiting block 33 to slide along the limiting rod 34, thereby driving the connecting plate 7, the base 10, and the cutting torch 12 to move laterally, adjusting the lateral position of the cutting torch 12 above the worktable 1. The cylinder 11 extends and retracts, causing the mounting plate 26 and the cutting torch 12 to move vertically, and the guide block 27 slides along the guide rod 28, adjusting the distance between the cutting torch 12 and the workpiece.

[0048] When the protective assembly 8 needs to be deployed, the third motor 901 rotates, pushing the drive block 13 to rotate circumferentially on the sliding seat 14 via the connecting rod 902, thus moving the protective assembly 8 to the same side as the cutting torch 12. Subsequently, the second motor 15 drives the rotating shaft to rotate, lowering the roller shutter 801. The roller shutter 801 unfolds vertically along the guide groove 17 on both sides, and the counterweight 19 and flexible sealing strip 18 fit against the working surface, together with the connecting plate 7, enclosing and shielding the working area of ​​the workpiece being cut.

[0049] When the protective component 8 needs to be stored, the second motor 15 rotates in the opposite direction, driving the rotating shaft to roll up the curtain 801 onto the bracket 802. Then, the third motor 901 rotates in the opposite direction, pulling the drive block 13 to rotate in the opposite circumference on the sliding seat 14 via the connecting rod 902, so that the protective component 8 is removed from the same side as the cutting torch 12 and rotates to the other side of the connecting plate 7, thereby releasing the enclosure of the working area of ​​the cutting workpiece.

[0050] This application achieves precise positioning and efficient protection of the cutting torch in 12 directions, effectively limiting the splashing of high-temperature molten metal particles and strong light radiation, thereby improving cutting accuracy and operational safety.

[0051] In the above embodiments, unless otherwise explicitly specified and limited, "above" or "below" the second feature can mean that the first feature is in direct contact with the second feature, or that the first feature is in indirect contact with the second feature through an intermediate medium. Furthermore, "above," "on top of," and "over" the second feature can mean that the first feature is directly above or diagonally above the second feature, or simply that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature can mean that the first feature is directly below or diagonally below the second feature, or simply that the first feature is at a lower horizontal level than the second feature.

[0052] It should be noted that when an element is referred to as being "fixed to" or "set on" another element, it can be directly on the other element or there may be an intervening element. When an element is considered to be "connected to" another element, it can be directly connected to the other element or there may be an intervening element. The terms "vertical," "horizontal," "upper," "lower," "left," "right," and similar expressions used herein are for illustrative purposes only and do not represent the only possible implementation.

[0053] In the description of this specification, the references to terms such as "one embodiment," "some embodiments," "method," "specific method," or "some methods," etc., indicate that a specific feature, structure, material, or characteristic described in connection with that embodiment or method is included in at least one embodiment or method of the present invention. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or method. Furthermore, the specific features, structures, materials, or characteristics described may be combined in a suitable manner in any one or more embodiments or methods. Moreover, without contradiction, those skilled in the art can combine and integrate the different embodiments or methods described in this specification, as well as the features of different embodiments or methods.

[0054] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of this utility model, and are not intended to limit it. Although the utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some or all of the technical features therein. Such modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of this utility model.

Claims

1. A plasma cutting machine, characterized in that, include: The workbench has a support frame at its bottom end and fixed plates on both sides along its length. A first lead screw is rotatably mounted between the two fixed plates. One end of the first lead screw passes through the fixed plate and is connected to the rotating shaft of a first motor. The first motor is mounted on the outer wall of the fixed plate. A first sliding block is mounted on the first lead screw, and a connecting plate is mounted on the first sliding block. A base is mounted at the top of the connecting plate, and a cylinder is mounted at the top of the base. The telescopic end of the cylinder passes through the base and is connected to a cutting torch. A protective component is provided, wherein the protective component is slidably connected to a sliding seat via a driving block, the sliding seat is connected to a base, and an adjustment component is provided on the base. The adjustment component is connected to the driving block and is used to drive the driving block to slide on the sliding seat, thereby controlling the unfolding and retraction of the protective component.

2. The plasma cutting machine according to claim 1, characterized in that, The protective assembly includes a roller shutter and a bracket. The roller shutter is wound around the rotating shaft of the bracket. A second motor is provided on the side wall of the bracket. The rotating shaft of the second motor is connected to the rotating shaft. There are multiple brackets, and the multiple brackets are evenly distributed along the side wall of the drive block.

3. The plasma cutting machine according to claim 2, characterized in that, Two guide blocks are symmetrically arranged on both sides of the bracket, and guide grooves are provided on the opposite side walls of the two guide blocks.

4. The plasma cutting machine according to claim 2, characterized in that, The bottom end of the roller shutter is provided with a flexible sealing strip, and the bottom end of the flexible sealing strip is provided with a counterweight.

5. The plasma cutting machine according to claim 1, characterized in that, The bottom end of the connecting plate is slidably provided with a baffle, the bottom end of the connecting plate has an opening groove, a sliding groove is provided on the side wall opposite to the opening groove, and a slider is provided on the side wall opposite to the baffle. The baffle is slidably connected to the connecting plate through the slider.

6. The plasma cutting machine according to claim 1, characterized in that, A flexible dustproof strip is provided at the side wall opening of the drive block.

7. The plasma cutting machine according to claim 1, characterized in that, The adjustment assembly includes a third motor and a connecting rod. The third motor is mounted on the base, and the rotation shaft of the third motor is connected to one end of the connecting rod, while the other end of the connecting rod is hinged to the drive block.

8. The plasma cutting machine according to claim 1, characterized in that, A protective cover is fitted on the side wall near the lower end of the cutting torch.

9. The plasma cutting machine according to claim 1, characterized in that, The cutting torch is detachably mounted on the mounting plate, which is connected to the telescopic end of the cylinder. A guide block is provided on the side wall of the mounting plate away from the cutting torch, and a guide rod is provided on the connecting plate. The guide block slides on the guide rod.

10. The plasma cutting machine according to claim 1, characterized in that, The worktable is equipped with a second lead screw that can be rotated on both sides along its length. The two second lead screws are respectively connected to the fourth motor and the fifth motor. Each of the two second lead screws is equipped with a second sliding block, which is connected to the side wall of the fixed plate.

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