Slag discharging device for laser cutting

Through the coordinated work of designing cleaning components, sealing components, extrusion components and clamping components, the problems of poor slag discharge effect and insufficient structural properties in existing laser cutting devices are solved, efficient and automated residue treatment is achieved, and the practicality and reliability of the equipment are improved.

CN120269140AInactive Publication Date: 2025-07-08YANGZHOU HANGFEI PRECISION ELECTROMECHANICAL CO LTD
View PDF 0 Cites 0 Cited by

Patent Information

Application Number
CN202510497027.4
Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
Filing Date
2025-04-21
Publication Date
2025-07-08
Estimated Expiration
Not applicable · inactive patent

AI Technical Summary

Technical Problem

The existing laser cutting device cannot simultaneously realize the slag discharge structures for slag discharge synchronously, and the slag discharge effect is poor, and a separate extrusion equipment is required for extrusion after the slag discharge, which has poor structural properties. The components that push and collect residues cannot be collected in an emergency after damage.

Method used

A slag discharge device for laser cutting is designed, including cleaning components, sealing components, extrusion components and clamping components. The motor drives the threaded rod and the cleaning block are combined with the cleaning block, and the jet pipe and the jet hole assist in cleaning. The electric cylinder controls the movement of the sealing block, and the hydraulic cylinder drives the extrusion and clamping block to realize automatic residue treatment.

Benefits of technology

It improves cleaning efficiency, enhances cleaning effect, simplifies debris collection and processing process, reduces manual intervention, and ensures the continuous operation capability and overall practicality of the equipment.

✦ Generated by Eureka AI based on patent content.

Smart Images

  • Figure CN120269140A_ABST
    Figure CN120269140A_ABST
Patent Text Reader

Abstract

The invention provides a slag discharging device for laser cutting, and relates to the technical field of slag discharging devices. The laser cutting machine body is placed on the ground, a first connecting block of a rectangular blocky structure is fixed to the top end face of the laser cutting machine body, two first guide rods are arranged on the first connecting block in a sliding mode, one ends of the front sides of the two first guide rods are welded to a cleaning block, and the bottom end face of the cleaning block makes contact with the top end face of the laser cutting machine body. A motor is fixed to the rear end face of the cleaning block, a threaded rod is fixed to an output shaft of the motor, and the threaded rod is in threaded connection with the first connecting block. Through combination of a threaded rod driven by a motor and a cleaning block, automatic collection of residues on the top end face of the laser cutting machine body is achieved, the cleaning efficiency is improved, and manual intervention is reduced; the air spraying pipe, the first air spraying hole and the second air spraying hole are arranged on the cleaning block, cleaning is assisted through air, residues are effectively blown away and guided into the cleaning holes, and the cleaning effect is enhanced.
Need to check novelty before this filing date? Find Prior Art

Description

Technical Field

[0001] The present invention relates to the technical field of slag discharging devices, and particularly to a slag discharging device for laser cutting. Background Art

[0002] A laser cutting machine emits laser light from a laser, which is focused into a laser beam with a high power density through an optical path system and irradiates the surface of a workpiece, causing the workpiece to reach the melting point or boiling point. At the same time, a high-pressure gas coaxial with the beam blows away the melted or vaporized metal. As the relative position of the beam and the workpiece moves, finally a cut is formed in the material, thus achieving the purpose of cutting. During the cutting process of the laser cutting machine, a lot of debris will be generated, and at this time, it is necessary to remove it through a slag discharging device.

[0003] Although the existing devices can discharge slag by scraping, they cannot simultaneously realize the synchronous slag discharging of multiple slag discharging structures, and the slag discharging effect is poor; after the existing devices achieve slag discharging, they cannot extrude the residue debris, and subsequent separate extrusion equipment is still required for extrusion, and the structure is poor; after the components for pushing and collecting the residue are damaged in the existing devices, emergency collection cannot be carried out.

[0004] Therefore, in view of this, research and improvement are carried out on the existing structure and deficiencies, and a slag discharging device for laser cutting is provided, with the expectation of achieving a more practical value. Summary of the Invention

[0005] In order to solve the above technical problems, the present invention provides a slag discharging device for laser cutting to solve the problems that although the existing devices can discharge slag by scraping, they cannot simultaneously realize the synchronous slag discharging of multiple slag discharging structures, and the slag discharging effect is poor; after the existing devices achieve slag discharging, they cannot extrude the residue debris, and subsequent separate extrusion equipment is still required for extrusion, and the structure is poor; after the components for pushing and collecting the residue are damaged in the existing devices, emergency collection cannot be carried out.

[0006] The present invention provides a slag discharging device for laser cutting, which specifically includes: a laser cutting machine main body; the laser cutting machine main body is placed on the ground, and a first connecting block in the shape of a rectangular block is fixed on the top end surface of the laser cutting machine main body. Two first guide rods slide on the first connecting block. One end of the front side of the two first guide rods is welded to a cleaning block. The bottom end surface of the cleaning block contacts the top end surface of the laser cutting machine main body. A motor is fixed to the rear end surface of the cleaning block, and a threaded rod is fixed to the output shaft of the motor. The threaded rod is threadedly connected to the first connecting block.

[0007] Further, the top surface of the laser cutting machine main body is provided with cleaning holes in a linear array. The cleaning holes are rectangular hole-shaped structures. The cleaning block is aligned with the cleaning holes. A material guiding plate is fixed inside the laser cutting machine main body. The material guiding plate is located directly below the cleaning holes and is arranged in an inclined shape.

[0008] Further, a gas spraying pipe is fixed on the cleaning block. The gas spraying pipe is connected to an externally provided air supply pump. The gas spraying pipe is provided with first gas spraying holes in a linear array. The first gas spraying holes are arranged in an inclined shape.

[0009] Further, the gas spraying pipe is provided with second gas spraying holes in a linear array. The second gas spraying holes are arranged vertically. During the movement of the cleaning block, the gas sprayed out at the second gas spraying holes passes through the cleaning holes and contacts the material guiding plate. The first connecting block, the first guiding rod, the cleaning block, the motor, the threaded rod, the gas spraying pipe, the first gas spraying holes, and the second gas spraying holes together form a cleaning assembly.

[0010] Further, a plugging assembly is installed at the cleaning holes. The plugging assembly is composed of a plugging block, a connecting rod, a mounting seat, and an electric cylinder. A plugging block slides in each cleaning hole. The plugging block matches the cleaning hole. The linearly arrayed plugging blocks are welded together by two connecting rods. Both connecting rods are cylindrical rod-shaped structures.

[0011] Further, two L-shaped mounting seats are fixed on the top inner wall surface of the laser cutting machine main body. An electric cylinder is fixed on each mounting seat. The extending ends of both electric cylinders are fixed on the top inner wall surface of the laser cutting machine main body.

[0012] Further, an extrusion assembly is installed on the laser cutting machine main body. The extrusion assembly is composed of a collection box, a second hydraulic cylinder, and an extrusion block. The collection box is fixed on the bottom inner wall surface of the laser cutting machine main body. The collection box is a rectangular box-shaped structure. The collection box is located at the front lower side position of the material guiding plate.

[0013] Further, two second hydraulic cylinders are symmetrically fixed on the top surface of the laser cutting machine main body. The extending ends of both second hydraulic cylinders pass through the laser cutting machine main body. The extending ends of both second hydraulic cylinders are fixed on the extrusion block. The extrusion block is located directly above the collection box.

[0014] Furthermore, a clamping assembly is installed on the main body of the laser cutting machine. The clamping assembly consists of a second connecting block, a second guiding rod, a clamping block, and a first hydraulic cylinder. Two second connecting blocks are fixed on the top surface of the main body of the laser cutting machine. Two second guiding rods are slidably arranged on each second connecting block. The right ends of the two second guiding rods on the left are welded to a clamping block respectively, and the left ends of the two second guiding rods on the right are welded to another clamping block respectively. A first hydraulic cylinder is fixed on each second connecting block, and the extending ends of the two first hydraulic cylinders are respectively fixed on the two clamping blocks. The bottom surfaces of the two clamping blocks are in contact with the top surface of the main body of the laser cutting machine.

[0015] Compared with the prior art, the present invention has the following beneficial effects: Efficient cleaning mechanism: The combination of the threaded rod driven by the motor and the cleaning block realizes the automatic collection of residues on the top surface of the main body of the laser cutting machine, improves the cleaning efficiency, and reduces manual intervention; the air injection pipe and the first and second air injection holes arranged on the cleaning block use gas to assist in cleaning, effectively blowing and guiding the residues into the cleaning holes, and enhancing the cleaning effect.

[0016] Intelligent plugging and slag discharging system: The design of the plugging assembly controls the movement of the plugging block through the electric cylinder, which can prevent small parts from falling during normal operation and quickly open the cleaning hole during slag discharging, realizing the dual functions of cleaning and protection; the connecting rod is designed in a cylindrical shape, avoiding the residue of debris and ensuring the cleanliness of the system.

[0017] Optimized debris collection and treatment: The setting of the collection box directly receives the debris sliding from the material guiding plate, simplifies the debris collection process, and improves the work efficiency; the introduction of the extrusion assembly compresses the debris in the collection box through the hydraulic cylinder-driven extrusion block, effectively reducing the space occupied by the debris and facilitating subsequent treatment and recycling.

[0018] Flexible clamping backup scheme: The clamping assembly is used as a backup scheme for the cleaning mechanism. When the motor is damaged, the clamping block can be driven by the hydraulic cylinder to move inward to realize the concentration and extrusion of residues, ensuring the continuous operation ability of the equipment; the design of the clamping assembly enhances the adaptability and reliability of the equipment, and reduces the downtime caused by the failure of a single component.

[0019] Rationality and practicability of the overall structure design: The ingenious cooperation among the components, such as the coordinated work of the cleaning component, the plugging component, the extrusion component, and the clamping component, forms an efficient and automated residue treatment system.

[0020] The structural design of the main body of the laser cutting machine takes into account the actual operation requirements, such as the setting of the cleaning hole and the material guiding plate, as well as the easy installation and maintenance of each component, improving the overall practicability and user-friendliness of the equipment. Description of the Drawings

[0021] To more clearly illustrate the technical solutions of the embodiments of the present invention, the accompanying drawings of the embodiments will be briefly introduced below.

[0022] In the accompanying drawings: Figure 1 An axonometric structural schematic diagram of the slag discharging device for laser cutting according to the present invention is shown; Figure 2 A front view structural schematic diagram of the slag discharging device for laser cutting according to the present invention is shown; Figure 3 An axonometric structural schematic diagram of the slag discharging device for laser cutting according to the present invention after being partially cut open is shown; Figure 4 Shown is according to the present invention Figure 3 An enlarged structural schematic diagram at position A; Figure 5 An axonometric structural schematic diagram of the main body of the laser cutting machine according to the present invention after being cut open is shown; Figure 6 An axonometric structural schematic diagram of the cleaning component according to the present invention is shown; Figure 7 Shown is according to the present invention Figure 6 An axonometric structural schematic diagram after rotation; Figure 8 Shown is according to the present invention Figure 7 An enlarged structural schematic diagram at position B.

[0023] List of reference numerals 1. Main body of the laser cutting machine; 101. Cleaning hole; 102. Material guiding plate; 2. Cleaning component; 201. First connecting block; 202. First guiding rod; 203. Cleaning block; 204. Electric motor; 205. Threaded rod; 206. Air spraying pipe; 207. First air spraying hole; 208. Second air spraying hole; 3. Sealing component; 301. Sealing block; 302. Connecting rod; 303. Mounting seat; 304. Electric cylinder; 4. Clamping component; 401. Second connecting block; 402. Second guiding rod; 403. Clamping block; 404. First hydraulic cylinder; 5. Extrusion component; 501. Collection box; 502. Second hydraulic cylinder; 503. Extrusion block. Detailed implementation manners

[0024] The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present invention without creative efforts shall fall within the protection scope of the present invention.

[0025] Unless otherwise defined, all terms (including technical and scientific terms) used in the embodiments of the present invention have the same meaning as commonly understood by those of ordinary skill in the art to which the present invention belongs. It should also be understood that terms such as those defined in a commonly used dictionary should be interpreted as having a meaning consistent with their meaning in the context of the relevant art, and should not be interpreted in an idealized or overly formal sense, unless explicitly defined as such in the embodiments of the present invention.

[0026] The "first", "second" and similar terms used in the embodiments of the present invention do not denote any order, quantity or importance, but are only used to distinguish different components. Terms such as "a", "an" or "the" do not denote a limitation of quantity, but mean that there is at least one. Similarly, words such as "comprising" or "including" mean that the element or item appearing before the word encompasses the elements or items listed after the word and their equivalents, without excluding other elements or items. In the following description, spatial and orientation terms such as "upper", "lower", "front", "rear", "top", "bottom", "vertical" and "horizontal" may be used to describe the embodiments of the present invention, but it should be understood that these terms are only for the convenience of describing the embodiments shown in the drawings, and do not require the actual device to be constructed or operated in a specific orientation. In the following description, the use of terms such as "connected", "coupled", "fixed" and "attached" may refer to the direct connection between two elements or structures without other elements or structures, or may refer to the indirect connection between two elements or structures through intermediate elements or structures, unless otherwise clearly stated herein.

[0027] Embodiment 1: As shown in the Figure 1 to Figure 8 accompanying drawings: The present invention provides a slag discharging device for laser cutting, comprising: a laser cutting machine main body 1; the laser cutting machine main body 1 is placed on the ground, and a first connecting block 201 in the shape of a rectangular block is fixed on the top end surface of the laser cutting machine main body 1. Two first guide rods 202 are slidably arranged on the first connecting block 201. The front ends of the two first guide rods 202 are welded to a cleaning block 203. The bottom end surface of the cleaning block 203 is in contact with the top end surface of the laser cutting machine main body 1. A motor 204 is fixed to the rear end surface of the cleaning block 203. A threaded rod 205 is fixed to the output shaft of the motor 204. The threaded rod 205 is threadedly connected to the first connecting block 201. When collecting the residues on the top end surface of the laser cutting machine main body 1, the motor 204 is driven to rotate. The motor 204 drives the threaded rod 205 to rotate. Under the drive of the threaded rod 205, the cleaning block 203 can be adjusted back and forth, thus realizing the collection of the residues on the top end surface of the laser cutting machine main body 1.

[0028] Among them, cleaning holes 101 are linearly and arrayedly formed on the top end surface of the laser cutting machine main body 1. The cleaning holes 101 are in the shape of rectangular holes. The cleaning block 203 is aligned with the cleaning holes 101. A material guiding plate 102 is fixed inside the laser cutting machine main body 1. The material guiding plate 102 is located directly below the cleaning holes 101. The material guiding plate 102 is arranged in an inclined shape. When the cleaning block 203 moves forward, the residues can be collected at the cleaning holes 101. Finally, the residues fall onto the material guiding plate 102 and are then discharged from the material guiding plate 102.

[0029] Among them, a gas spraying pipe 206 is fixed to the cleaning block 203. The gas spraying pipe 206 is connected to an external air supply pump. First gas spraying holes 207 are linearly and arrayedly formed on the gas spraying pipe 206. The first gas spraying holes 207 are formed in an inclined shape. During the movement of the cleaning block 203, the gas ejected from the first gas spraying holes 207 can assist in cleaning the residues on the top end surface of the laser cutting machine main body 1.

[0030] Among them, second gas spraying holes 208 are linearly and arrayedly formed on the gas spraying pipe 206. The second gas spraying holes 208 are formed in a vertical shape. During the movement of the cleaning block 203, the gas ejected from the second gas spraying holes 208 passes through the cleaning holes 101 and contacts the material guiding plate 102. The first connecting block 201, the first guide rods 202, the cleaning block 203, the motor 204, the threaded rod 205, the gas spraying pipe 206, the first gas spraying holes 207 and the second gas spraying holes 208 together form a cleaning assembly 2. Under the blowing action of the gas, it can better ensure that the residues slide down from the material guiding plate 102.

[0031] Among them, a plugging component 3 is installed at the cleaning hole 101. The plugging component 3 is composed of a plugging block 301, a connecting rod 302, a mounting seat 303 and an electric cylinder 304. A plugging block 301 slides in each cleaning hole 101. The plugging block 301 matches the cleaning hole 101. The plugging blocks 301 in a linear array are welded together by two connecting rods 302. Both connecting rods 302 are cylindrical rod-shaped structures. By plugging the cleaning hole 101 with the plugging block 301, small parts can be prevented from falling from the cleaning hole 101. And because the connecting rod 302 is a cylindrical rod-shaped structure, when debris falls on the connecting rod 302, it will automatically slide off, avoiding the residue of debris on the connecting rod 302.

[0032] Among them, two L-shaped mounting seats 303 are fixed on the inner wall top surface of the laser cutting machine main body 1. An electric cylinder 304 is fixed on each mounting seat 303. The extending ends of the two electric cylinders 304 are fixed on the inner wall top surface of the laser cutting machine main body 1. When discharging slag, drive the two electric cylinders 304 to contract. When the plugging block 301 disengages from the cleaning hole 101, slag can be discharged through the cleaning hole 101.

[0033] Among them, an extrusion component 5 is installed on the laser cutting machine main body 1. The extrusion component 5 is composed of a collection box 501, a second hydraulic cylinder 502 and an extrusion block 503. The collection box 501 is fixed on the inner wall bottom surface of the laser cutting machine main body 1. The collection box 501 is a rectangular box-shaped structure. The collection box 501 is located at the front lower side of the material guiding plate 102. During use, the debris sliding on the material guiding plate 102 will directly fall into the collection box 501 for collection.

[0034] Among them, two second hydraulic cylinders 502 are symmetrically fixed on the top surface of the laser cutting machine main body 1. The extending ends of the two second hydraulic cylinders 502 pass through the laser cutting machine main body 1. The extending ends of the two second hydraulic cylinders 502 are fixed on the extrusion block 503. The extrusion block 503 is located directly above the collection box 501. When it is necessary to extrude the debris, drive the two second hydraulic cylinders 502 to extend. The two second hydraulic cylinders 502 drive the extrusion block 503 to move downward. By extruding the debris in the collection box 501 with the extrusion block 503, the space occupied by the debris can be reduced.

[0035] Embodiment 2: Based on the first embodiment, it further includes: Among them, a clamping component 4 is installed on the laser cutting machine main body 1. The clamping component 4 is composed of a second connecting block 401, a second guide rod 402, a clamping block 403, and a first hydraulic cylinder 404. Two second connecting blocks 401 are fixed on the top end surface of the laser cutting machine main body 1. Two second guide rods 402 slide on each second connecting block 401. The right ends of the two second guide rods 402 on the left side are welded to a clamping block 403, and the left ends of the two second guide rods 402 on the right side are welded to another clamping block 403. A first hydraulic cylinder 404 is fixed on each second connecting block 401. The extending ends of the two first hydraulic cylinders 404 are respectively fixed on the two clamping blocks 403. The bottom end surfaces of the two clamping blocks 403 are in contact with the top end surface of the laser cutting machine main body 1. When the motor 204 is damaged, drive the two first hydraulic cylinders 404 to extend. At this time, the two clamping blocks 403 move inward to complete the extrusion of the residue.

[0036] The specific usage method and function of this embodiment: When cleaning the residue, drive the two electric cylinders 304 to contract until the blocking block 301 disengages from the cleaning hole 101; drive the motor 204 to rotate, and the motor 204 drives the threaded rod 205 to rotate. Under the drive of the threaded rod 205, the cleaning block 203 can be adjusted forward; when the cleaning block 203 moves forward, the residue can be gathered at the cleaning hole 101. Finally, the residue falls onto the guide plate 102, and the residue slides from the guide plate 102 into the collection box 501; when it is necessary to extrude the debris, drive the two second hydraulic cylinders 502 to extend. The two second hydraulic cylinders 502 drive the extrusion block 503 to move downward to extrude the debris in the collection box 501 through the extrusion block 503; when the motor 204 is damaged, drive the two first hydraulic cylinders 404 to extend. At this time, the two clamping blocks 403 move inward to complete the extrusion of the residue; after the cleaning is completed, drive the two electric cylinders 304 to extend. Driven by the two electric cylinders 304, the blocking block 301 is inserted into the cleaning hole 101 to complete the blocking of the cleaning hole 101.

[0037] The above is only the specific implementation manner of the present disclosure, but the protection scope of the present disclosure is not limited thereto. The protection scope of the present disclosure shall be subject to the protection scope of the claims.

Claims

1. A slag discharging device for laser cutting, characterized in that, Including: A laser cutting machine main body (1); the laser cutting machine main body (1) is placed on the ground, and a first connecting block (201) in the shape of a rectangular block is fixed on the top end surface of the laser cutting machine main body (1). Two first guide rods (202) slide on the first connecting block (201). The front ends of the two first guide rods (202) are welded to a cleaning block (203). The bottom end surface of the cleaning block (203) contacts the top end surface of the laser cutting machine main body (1). A motor (204) is fixed on the rear end surface of the cleaning block (203). A threaded rod (205) is fixed on the output shaft of the motor (204). The threaded rod (205) is threadedly connected to the first connecting block (201).

2. The slag discharging device for laser cutting according to claim 1, characterized in that: Cleaning holes (101) are formed in a linear array on the top end surface of the laser cutting machine main body (1). The cleaning holes (101) are rectangular hole-shaped structures. The cleaning block (203) is aligned with the cleaning holes (101). A material guiding plate (102) is fixed inside the laser cutting machine main body (1). The material guiding plate (102) is located directly below the cleaning holes (101) and is inclined.

3. The slag discharging device for laser cutting according to claim 2, characterized in that: A gas spraying pipe (206) is fixed on the cleaning block (203). The gas spraying pipe (206) is connected to an external air supply pump. First gas spraying holes (207) are formed in a linear array on the gas spraying pipe (206). The first gas spraying holes (207) are inclined.

4. The slag discharging device for laser cutting according to claim 3, wherein: Second gas spraying holes (208) are formed in a linear array on the gas spraying pipe (206). The second gas spraying holes (208) are vertical. During the movement of the cleaning block (203), the gas ejected from the second gas spraying holes (208) passes through the cleaning holes (101) and contacts the material guiding plate (102). The first connecting block (201), the first guide rods (202), the cleaning block (203), the motor (204), the threaded rod (205), the gas spraying pipe (206), the first gas spraying holes (207) and the second gas spraying holes (208) together form a cleaning assembly (2).

5. The slag discharging device for laser cutting according to claim 4, wherein: A plugging assembly (3) is installed at the cleaning holes (101). The plugging assembly (3) is composed of a plugging block (301), a connecting rod (302), a mounting seat (303) and an electric cylinder (304). A plugging block (301) slides in each cleaning hole (101). The plugging block (301) matches the cleaning hole (101). The linearly arrayed plugging blocks (301) are welded together by two connecting rods (302). The two connecting rods (302) are both cylindrical rod-shaped structures.

6. The slag discharging device for laser cutting according to claim 5, characterized in that: Two L-shaped mounting seats (303) are fixed on the top end surface of the inner wall of the laser cutting machine main body (1). An electric cylinder (304) is fixed on each mounting seat (303). The extending ends of the two electric cylinders (304) are fixed on the top end surface of the inner wall of the laser cutting machine main body (1).

7. The slag discharging device for laser cutting according to claim 6, wherein: An extrusion assembly (5) is installed on the main body (1) of the laser cutting machine. The extrusion assembly (5) is composed of a collection box (501), a second hydraulic cylinder (502) and an extrusion block (503). The collection box (501) is fixed to the bottom end face of the inner wall of the main body (1) of the laser cutting machine. The collection box (501) is in the shape of a rectangular box and is located at the front lower side of the material guiding plate (102).

8. The slag discharging device for laser cutting according to claim 7, characterized in that: Two second hydraulic cylinders (502) are symmetrically fixed to the top end face of the main body (1) of the laser cutting machine. The extending ends of the two second hydraulic cylinders (502) both pass through the main body (1) of the laser cutting machine, and the extending ends of the two second hydraulic cylinders (502) are both fixed to the extrusion block (503). The extrusion block (503) is located directly above the collection box (501).

9. The slag discharging device for laser cutting according to claim 8, wherein: A clamping assembly (4) is installed on the main body (1) of the laser cutting machine. The clamping assembly (4) is composed of a second connecting block (401), a second guide rod (402), a clamping block (403) and a first hydraulic cylinder (404). Two second connecting blocks (401) are fixed to the top end face of the main body (1) of the laser cutting machine. Two second guide rods (402) slide on each second connecting block (401). The right ends of the two second guide rods (402) on the left are welded to a clamping block (403), and the left ends of the two second guide rods (402) on the right are welded to another clamping block (403). A first hydraulic cylinder (404) is fixed to each second connecting block (401). The extending ends of the two first hydraulic cylinders (404) are respectively fixed to the two clamping blocks (403). The bottom end faces of the two clamping blocks (403) are in contact with the top end face of the main body (1) of the laser cutting machine.