Laser cutting machine for metal sheets

Abstract

The invention discloses a laser cutting machine for metal sheets, which relates to a laser cutting technology for metal sheets and comprises a cutting machine body and a protective outer cover detachably mounted outside the cutting machine body. A feeding channel and a discharging channel are arranged on the left side and the right side of the upper portion of the cutting machine body correspondingly. The cutting machine further comprises a cutting mechanism arranged on the upper portion of the interior of the cutting machine body, and the cutting mechanism comprises a laser cutter. Wherein the outer ends of the transverse sliding frames are installed on the top faces of the longitudinal sliding frames in a sliding mode, and the symmetrically-distributed longitudinal sliding frames are fixedly installed on the left side and the right side of the upper portion of the cutting machine body. According to the laser cutting machine for the metal sheets, the cutting machine body drives the metal sheets to be fed, the positioning mechanism automatically adjusts the position of the pressing and covering mechanism according to the specifications of the metal sheets, meanwhile, cleaning is conducted before pressing and covering, damage caused by residual metal powder is avoided, and meanwhile the accuracy in the laser cutting process is improved.

Description

Technical Field

[0001] This invention relates to the field of laser cutting technology for metal sheets, specifically to a laser cutting machine for metal sheets. Background Technology

[0002] A metal sheet laser cutting machine is a laser processing device specifically designed for cutting metal sheets. It utilizes a high-energy-density laser beam to irradiate the surface of the metal sheet, causing the material to rapidly melt, vaporize, or reach its ignition point. Simultaneously, high-pressure gas blows away the molten or vaporized material, creating a precise kerf. Its main features are high precision, high efficiency, and wide applicability. It can cut various metal materials such as stainless steel, carbon steel, aluminum, and copper, and is widely used in industries such as automotive, aerospace, and electronics. The utility model patent with announcement number CN215238634U discloses a sheet metal cutting device for metal electromechanical applications. In use, the metal sheet is first placed on a conveying mechanism, which transports the metal sheet towards the laser emitter. When the metal sheet reaches the cutting position, the conveying mechanism stops transporting. Simultaneously, through the cooperation of the first electric push rod, the second electric push rod, the connecting plate, the laser emitter, and the laser head, the metal sheet can be automatically cut, resulting in high work efficiency. Furthermore, during laser cutting, the dust collection component can effectively absorb the fumes generated during cutting, preventing dust pollution of the working environment and protecting the health of the workers.

[0003] The utility model disclosed in CN220902220U is a laser cutting machine for metal coils. By setting a coil tube positive pressure flattening mechanism, the unfolded and bent coil is flattened, so that the coil enters the cutting chamber of the laser cutting machine in a flattened state. At the same time, a sheet clamping and tensioning mechanism is set in the cutting chamber to clamp and tension the sheet during cutting, so that the coil is flattened and tensioned during laser cutting, ensuring the flatness of the cut sheet product.

[0004] However, the laser cutting machine for metal sheets disclosed above still has the following problems in actual use: the laser cutting head is used to cut the metal sheet, but such metal sheets are prone to curling and bending in the previous steps, which leads to deviation in the cutting path due to the curling and inversion. At the same time, some metal sheets have metal dust on their surface. Direct pressing and positioning can easily damage the positioning mechanism that supplies pressure. In addition, the force of pressing and covering the metal dust will also act in the opposite direction on the surface of the metal sheet, causing scratches and affecting the subsequent processing and use of the metal sheet.

[0005] Therefore, we propose a laser cutting machine for metal sheets to solve the problems mentioned above. Summary of the Invention

[0006] The purpose of this invention is to provide a laser cutting machine for metal sheets. This addresses the problems of existing laser cutting methods that use laser cutting heads to cut metal sheets, where the sheets are prone to curling and bending in the preceding steps. This curling and bending can cause deviations in the cutting path during the cutting process. Additionally, some metal sheets have metal dust on their surface, and direct pressing and positioning can damage the pressure-supplying positioning mechanism. Furthermore, the force applied to the metal dust can also cause scratches on the surface of the metal sheet, affecting its subsequent processing and use.

[0007] To achieve the above objectives, the present invention provides the following technical solution: a laser cutting machine for metal sheets, comprising a cutting machine body and a protective cover that can be detachably installed on the outside of the cutting machine body; The upper left and right sides of the cutting machine body are respectively provided with a feeding channel and a discharging channel, and the upper front of the cutting machine body is provided with a discharge component. It also includes: a cutting mechanism is provided inside the upper part of the cutting machine body, and the cutting mechanism includes a laser cutter, and the laser cutter is slidably mounted on the front of the transverse carriage; The outer end of the transverse carriage is slidably mounted on the top surface of the longitudinal carriage, and the symmetrically distributed longitudinal carriages are fixedly mounted on the upper left and right sides of the cutting machine body.

[0008] Preferably, a positioning mechanism is provided above the cutting machine body, and the positioning mechanism includes a positioning platform fixedly installed at the center position above the cutting machine body, and a main adapter slider and a secondary adapter slider are slidably distributed on the left and right sides above the positioning platform.

[0009] Preferably, the positioning mechanism includes a main adapter slider and a secondary adapter slider, which are symmetrically distributed in pairs. The main adapter slider and the secondary adapter slider are aligned in the same direction and have their inclined surfaces facing each other, and in the initial state, each pair of main adapter sliders and secondary adapter sliders are close to each other.

[0010] Preferably, the positioning mechanism includes a transmission shaft, which is rotatably mounted on the left and right sides of the bottom surface of the positioning platform via a torsion spring. The outer walls of the front and rear sides of the transmission shaft are provided with spiral guide grooves, and the symmetrically arranged transmission shafts are threadedly connected to the lower ends of the main adapter slider and the auxiliary adapter slider via the spiral guide grooves.

[0011] Preferably, the positioning mechanism includes a cutting platform, which is fixedly installed at the center of the positioning platform. Both the front and rear sides of the cutting platform are rotatably provided with drive shafts via bearings, and the outer ends of the drive shafts are meshed with the ends of the left and right transmission shafts via bevel gears.

[0012] Preferably, the top surface of the cutting platform is provided with a pressing mechanism, and the pressing mechanism includes a pressing slide. The lower ends of the symmetrically arranged pressing slides are slidably installed on the front and rear sides of the top surface of the cutting platform. Adaptive racks are fixedly provided on the left and right sides of the bottom surface of the symmetrically arranged pressing slides, and adaptive gears are meshed on the bottom surface of the symmetrically arranged adaptive racks.

[0013] Preferably, the pressing mechanism includes an adapter gear fixedly installed on the left and right outer walls of the drive shaft, and the pressing mechanism includes pressing cylinders fixedly installed on the left and right sides of the top surface of the pressing slide, and the telescopic part at the bottom of the pressing cylinder slides through the outside of the bottom surface of the pressing slide, and the symmetrically arranged telescopic parts of the pressing cylinders are fixedly connected to the left and right sides of the top surface of the pressing base plate, and the symmetrically arranged pressing base plates are distributed in a "π" shaped structure.

[0014] Preferably, a dust removal mechanism is provided in the middle of the bottom surface of the pressing base plate, and the dust removal mechanism includes dust removal nozzles. The upper ends of the symmetrical dust removal nozzles are elastically slidably installed on the upper outer surface of the pressing base plate, and the dust removal ports of the symmetrically arranged dust removal nozzles correspond to the contact surface between the outer side of the pressing base plate and the metal sheet.

[0015] Preferably, the dust removal mechanism includes a pressure sleeve that is elastically slidably installed in the middle of the bottom surface of the pressure plate, and the bottom surface of the pressure sleeve is elastically slidably attached to the top of the sealing plug plate. The left and right sides of the inside of the pressure sleeve are connected to the inner end of the one-way exhaust hose, and the outer end of the one-way exhaust hose is connected to the inside of the dust removal nozzle.

[0016] Preferably, the bottom surface of the sealing plug plate included in the dust removal mechanism is lower than the bottom surface of the pressing base plate, and the bottom surface of the sealing plug plate in the initial state does not contact the top surface of the cutting platform, and the bottom surface of the dust removal nozzle in the initial state is lower than the bottom surface of the pressing base plate, for cleaning and dust removal before pressing the metal sheet.

[0017] Compared with the prior art, the beneficial effects of the present invention are as follows: the laser cutting machine for metal sheets uses the machine body to feed the metal sheet, and the positioning mechanism automatically adjusts the position of the pressing mechanism according to the specifications of the metal sheet. Simultaneously, cleaning is performed before pressing to avoid damage caused by residual metal dust, and the accuracy of the laser cutting process is improved. The specific details are as follows: 1. The metal sheet is conveyed by the feeding channel above the cutting machine body. The end of the metal sheet abuts against the inclined surface of the main adapter slider. During the movement of the main adapter slider, the transmission shaft is driven to rotate through the spiral guide groove connected by a spiral. The bevel gear drives the drive shaft and adapter gear to rotate, which in turn drives the adapter rack and pressing slide to adjust back and forth, thereby autonomously adapting to metal sheets of different widths for positioning and pressing.

[0018] 2. After adjusting the spacing, the pressing carriage moves the pressing base plate downwards via the pressing cylinder. The sealing plug plate first contacts the metal sheet and then slides upwards in the opposite direction. The air inside the pressure sleeve is then transported through the through-connected one-way exhaust hose and sprayed onto the left and right sides of the bottom surface of the pressing base plate through dust removal nozzles. This is to clean the area of ​​the metal sheet that needs to be pressed, and to prevent residual metal waste from scratching the metal sheet.

[0019] Furthermore, after the metal sheet is cut, the pressing cylinder moves the pressing base plate upward, and the elastically connected sealing plug moves downward, thereby expanding the cavity space inside the pressure sleeve so that the pressure sleeve can draw in air through the one-way air inlet valve at the top, so as to replenish air for subsequent dust removal work.

[0020] 3. The longitudinal carriage drives the transverse carriage to move longitudinally, and the transverse carriage drives the laser cutter to move laterally. The metal sheet is cut above the cutting platform, and the remaining metal sheet scrap is conveyed through the feeding channel to continue moving. The cut metal sheet is picked up by the discharge component and conveyed and stacked. Attached Figure Description

[0021] Figure 1 This is a schematic diagram of the overall three-dimensional structure of the present invention; Figure 2 This is a schematic diagram of the installation structure of the laser cutter of the present invention; Figure 3 This is a three-dimensional structural schematic diagram of the laser cutter of the present invention; Figure 4 This is a three-dimensional structural diagram of the positioning platform of the present invention; Figure 5 This is a schematic diagram of the positioning platform structure from below in this invention; Figure 6 For the present invention Figure 5 Enlarged structural diagram at point A in the middle; Figure 7 This is a schematic diagram of the installation structure of the main adapter slider and the secondary adapter slider of the present invention; Figure 8 For the present invention Figure 7 Enlarged structural diagram at point B; Figure 9 This is a schematic diagram of the initial state of the pressure-covering carriage of the present invention; Figure 10 This is a schematic diagram of the structure of the pressing slide after it has been lowered according to the present invention; Figure 11 This is a three-dimensional structural schematic diagram of the dust removal nozzle of the present invention; Figure 12 For the present invention Figure 11 Enlarged structural diagram at point C.

[0022] In the diagram: 1. Cutting machine body; 2. Protective cover; 3. Feeding channel; 4. Discharging channel; 5. Laser cutter; 6. Horizontal slide; 7. Longitudinal slide; 8. Positioning platform; 9. Main adapter slider; 10. Secondary adapter slider; 11. Transmission shaft; 12. Spiral guide groove; 13. Cutting platform; 14. Drive shaft; 15. Bevel gear assembly; 16. Pressing slide; 17. Adapter rack; 18. Adapter gear; 19. Pressing cylinder; 20. Pressing base plate; 21. Dust removal nozzle; 22. Pressure sleeve; 23. Sealing plug plate; 24. One-way exhaust hose; 25. Discharge assembly. Detailed Implementation

[0023] 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 embodiments of the present invention, and not all embodiments. 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.

[0024] Please see Figures 1-12 The present invention provides the following technical solution: Example 1: To address the problems existing in the laser cutting of metal sheets, this example discloses the following technical solution: a laser cutting machine for metal sheets, comprising a cutting machine body 1 and a protective cover 2 detachably installed on the outside of the cutting machine body 1; wherein, a feeding channel 3 and a discharging channel 4 are respectively provided on the upper left and right sides of the cutting machine body 1, and a discharge component 25 is provided on the upper front of the cutting machine body 1; a positioning mechanism is provided on the upper part of the cutting machine body 1, and the positioning mechanism includes a positioning platform 8 fixedly installed at the center position on the upper part of the cutting machine body 1, and a main adapter slider 9 and a secondary adapter slider 10 are slidably distributed on the upper left and right sides of the positioning platform 8.

[0025] The positioning mechanism includes a main adapter slider 9 and a secondary adapter slider 10, which are symmetrically distributed in pairs. The main adapter slider 9 and the secondary adapter slider 10 are aligned in the same direction and are inclined inwards, and they are in contact with the ends of the metal sheet. In the initial state, each pair of main adapter sliders 9 and secondary adapter sliders 10 are close to each other. The positioning mechanism includes a transmission shaft 11, which is rotatably mounted on the left and right sides of the bottom surface of the positioning platform 8 by a torsion spring. The outer walls of the front and rear sides of the transmission shaft 11 are provided with spiral guide grooves 12. The symmetrically arranged transmission shafts 11 are threadedly connected to the lower ends of the main adapter slider 9 and the secondary adapter slider 10 through the spiral guide grooves 12.

[0026] like Figures 3-6 As shown, when the metal sheet is laser cut, the raw material is first conveyed through the feeding channel 3 on the upper left side of the cutting machine body 1 so that the metal sheet to be cut can move to the right and above the positioning platform 8. The end of the metal sheet first contacts the inner inclined surface of the main adapter slider 9 on the left side of the positioning platform 8. When the width of the metal sheet is greater than the distance between the main adapter sliders 9 on the front and rear sides, the end of the metal sheet abuts against the inclined surface of the main adapter slider 9 and drives it to slide outward synchronously so as to adapt to the metal sheet of different specifications for subsequent positioning processing.

[0027] Furthermore, when the main adapter slider 9 above the positioning platform 8 moves, it is connected to the transmission shaft 11 through the spiral guide groove 12, so that the transmission shaft 11 rotates below the positioning platform 8, thereby driving the pressing mechanism to adjust autonomously and avoid affecting the range of subsequent metal sheet laser cutting.

[0028] Example 2: To solve the problems existing in the laser cutting of metal sheets, this example discloses the following technical solution: The positioning mechanism includes a cutting platform 13, which is fixedly installed at the internal center of the positioning platform 8. The front and rear sides of the cutting platform 13 are rotatably provided with drive shafts 14 through bearings, and the outer ends of the drive shafts 14 are meshed with the ends of the left and right transmission shafts 11 through bevel gear sets 15. The top surface of the cutting platform 13 is provided with a pressing mechanism, which includes a pressing slide 16. The lower ends of the symmetrically arranged pressing slides 16 are slidably installed on the front and rear sides of the top surface of the cutting platform 13. The bottom left and right sides of the symmetrically arranged pressing slides 16 are fixedly provided with matching racks 17, and the bottom surfaces of the symmetrically arranged matching racks 17 are meshed with matching gears 18. The matching gears 18 included in the pressing mechanism are fixedly installed on the outer walls of the left and right sides of the drive shafts 14.

[0029] A dust removal mechanism is provided in the middle of the bottom surface of the pressing base plate 20. The dust removal mechanism includes dust removal nozzles 21. The upper ends of the symmetrical dust removal nozzles 21 are elastically slidably installed on the upper outside of the pressing base plate 20. The dust removal ports of the symmetrically arranged dust removal nozzles 21 correspond to the contact surfaces between the outer side of the pressing base plate 20 and the metal sheet. The dust removal mechanism includes a pressure sleeve 22 elastically slidably installed in the middle of the bottom surface of the pressing base plate 20. The bottom surface of the pressure sleeve 22 is elastically slidably mounted on the top of the sealing plug plate 23. The left and right sides of the inside of the pressure sleeve 22 are connected to the inner end of the one-way exhaust hose 24. The outer end of the one-way exhaust hose 24 is connected to the inside of the dust removal nozzles 21.

[0030] The bottom surface of the sealing plug plate 23 included in the dust removal mechanism is lower than the bottom surface of the pressing base plate 20, and the bottom surface of the sealing plug plate 23 in the initial state does not contact the top surface of the cutting platform 13, and the bottom surface of the dust removal nozzle 21 in the initial state is lower than the bottom surface of the pressing base plate 20, for cleaning and dust removal before pressing the metal sheet.

[0031] like Figures 7-8 As shown, during the rotation of the transmission shaft 11 on the bottom surface of the positioning platform 8, the drive shaft 14 and the adapter gear 18 are rotated by the bevel gear group 15 at its end. Then the adapter gear 18 drives the adapter rack 17 and the pressing slide 16 to slide backward, thereby adapting to the pressing and positioning of metal sheets of different widths.

[0032] like Figures 11-12 As shown, after the spacing of the pressing carriage 16 is adjusted, the pressing cylinders 19 on the left and right sides of its top surface drive the telescopic part at the lower end to move downward, so that the telescopic part drives the pressing base plate 20 and the dust removal mechanism on the bottom surface to move synchronously. The sealing plug plate 23 included in the dust removal mechanism first contacts the top surface of the metal sheet, and after being compressed, it moves into the interior of the pressure sleeve 22. The cavity in the internal cavity of the pressure sleeve 22 is compressed so that the air inside is sprayed to the outside through the through-connected dust removal nozzle 21. At the same time, the spray opening of the dust removal nozzle 21 faces the outer end of the bottom surface of the pressing base plate 20 so as to clean the surface of the pressing base plate that needs to contact the metal sheet, thereby avoiding metal dust residue from causing damage and scratches to the metal sheet.

[0033] Furthermore, after the metal sheet is cut, the pressing cylinder 19 above the pressing slide 16 drives the pressing base plate 20 to move upward. At this time, the elastically connected sealing plug 23 moves downward, thereby expanding the cavity space inside the pressure sleeve 22 so that the pressure sleeve 22 can draw in air through the one-way air inlet valve at the top, so as to replenish the air for subsequent dust removal work.

[0034] Example 3: To solve the problems existing in the laser cutting of metal sheets, this example discloses the following technical solution: The pressing mechanism includes pressing cylinders 19 fixedly installed on the left and right sides of the top surface of the pressing slide 16, and the telescopic part at the bottom of the pressing cylinder 19 slides through the outside of the bottom surface of the pressing slide 16. Moreover, the telescopic parts of the symmetrically arranged pressing cylinders 19 are fixedly connected to the left and right sides of the top surface of the pressing base plate 20. The symmetrically arranged pressing base plate 20 is distributed in a "π" shape. A cutting mechanism is provided inside the upper part of the cutting machine body 1, and the cutting mechanism includes a laser cutter 5. The laser cutter 5 is slidably installed on the front of the transverse slide 6. The outer end of the transverse slide 6 is slidably installed on the top surface of the longitudinal slide 7, and the symmetrically distributed longitudinal slides 7 are fixedly installed on the left and right sides above the cutting machine body 1.

[0035] like Figures 2-3 , Figures 9-10 As shown, after the metal sheet is positioned by the pressing mechanism, the longitudinal slide 7 installed above the cutting machine body 1 drives the transverse slide 6 and the laser cutter 5 to move in the longitudinal direction, while the transverse slide 6 drives the laser cutter 5 to move in the transverse direction. Thus, the positioned metal sheet is cut and processed above the cutting platform 13. The remaining metal sheet scrap is conveyed through the feeding channel 4 and continues to move. The cut metal sheet is picked up and stacked by the feeding component 25.

[0036] Although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the protection scope of the present invention.

Claims

1. A laser cutting machine for metal sheets, comprising a cutting machine body (1) and a protective cover (2) that can be detachably installed on the outside of the cutting machine body (1). in, The upper left and right sides of the cutting machine body (1) are respectively provided with a feeding channel (3) and a discharging channel (4), and the upper front of the cutting machine body (1) is provided with a discharge component (25). Its characteristic is that it further includes: The cutting machine body (1) is provided with a cutting mechanism inside the upper part of the interior, and the cutting mechanism includes a laser cutter (5), and the laser cutter (5) is slidably mounted on the front of the transverse carriage (6); The outer end of the transverse slide (6) is slidably mounted on the top surface of the longitudinal slide (7), and the symmetrically distributed longitudinal slides (7) are fixedly mounted on the upper left and right sides of the cutting machine body (1).

2. The laser cutting machine for metal sheets according to claim 1, characterized in that: A positioning mechanism is provided above the cutting machine body (1), and the positioning mechanism includes a positioning platform (8) fixedly installed at the center position above the cutting machine body (1), and a main adapter slider (9) and a secondary adapter slider (10) are slidably distributed on the left and right sides above the positioning platform (8).

3. The laser cutting machine for metal sheets according to claim 2, characterized in that: The positioning mechanism includes a main adapter slider (9) and a secondary adapter slider (10) which are symmetrically distributed in pairs. The main adapter slider (9) and the secondary adapter slider (10) are aligned in the same direction and have their inclined surfaces facing each other to fit against the end of the metal sheet. In the initial state, each pair of main adapter sliders (9) and secondary adapter sliders (10) are close to each other.

4. The laser cutting machine for metal sheets according to claim 3, characterized in that: The positioning mechanism includes a transmission shaft (11), and the transmission shaft (11) is rotatably mounted on the left and right sides of the bottom surface of the positioning platform (8) by a torsion spring. The outer walls of the front and rear sides of the transmission shaft (11) are provided with spiral guide grooves (12). The symmetrically arranged transmission shafts (11) are threadedly connected to the lower ends of the main adapter slider (9) and the auxiliary adapter slider (10) through the spiral guide grooves (12).

5. A laser cutting machine for metal sheets according to claim 4, characterized in that: The positioning mechanism includes a cutting platform (13), and the cutting platform (13) is fixedly installed at the center of the positioning platform (8). The front and rear sides of the cutting platform (13) are provided with drive shafts (14) through bearings. The outer end of the drive shaft (14) is connected to the ends of the left and right transmission shafts (11) through a bevel gear set (15).

6. The laser cutting machine for metal sheets according to claim 5, characterized in that: The top surface of the cutting platform (13) is provided with a pressing mechanism, and the pressing mechanism includes a pressing slide (16). The lower ends of the symmetrically arranged pressing slide (16) are slidably installed on the front and rear sides of the top surface of the cutting platform (13). The bottom left and right sides of the symmetrically arranged pressing slide (16) are fixedly provided with matching racks (17), and the bottom surfaces of the symmetrically arranged matching racks (17) are meshed with matching gears (18).

7. A laser cutting machine for metal sheets according to claim 6, characterized in that: The pressing mechanism includes an adapter gear (18) fixedly installed on the left and right outer walls of the drive shaft (14), and the pressing mechanism includes pressing cylinders (19) fixedly installed on the left and right sides of the top surface of the pressing slide (16), and the telescopic part at the bottom of the pressing cylinder (19) slides through the outside of the bottom surface of the pressing slide (16), and the telescopic parts of the symmetrically arranged pressing cylinders (19) are fixedly connected to the left and right sides of the top surface of the pressing base plate (20), and the symmetrically arranged pressing base plate (20) is distributed in a "π" shaped structure.

8. A laser cutting machine for metal sheets according to claim 7, characterized in that: A dust removal mechanism is provided in the middle of the bottom surface of the pressing base plate (20), and the dust removal mechanism includes a dust removal nozzle (21). The upper end of the symmetrical dust removal nozzle (21) is elastically slidably installed on the upper outside of the pressing base plate (20), and the dust removal port of the symmetrically arranged dust removal nozzle (21) corresponds to the contact surface between the outer side of the pressing base plate (20) and the metal sheet.

9. A laser cutting machine for metal sheets according to claim 8, characterized in that: The dust removal mechanism includes a pressure sleeve (22) that is elastically slidably installed in the middle of the bottom surface of the pressure base plate (20), and the bottom surface of the pressure sleeve (22) is elastically slidably on the top of the sealing plug plate (23). The left and right sides of the inside of the pressure sleeve (22) are connected to the inner end of the one-way exhaust hose (24), and the outer end of the one-way exhaust hose (24) is connected to the inside of the dust removal nozzle (21).

10. A laser cutting machine for metal sheets according to claim 9, characterized in that: The bottom surface of the sealing plug (23) included in the dust removal mechanism is lower than the bottom surface of the pressing base plate (20), and the bottom surface of the sealing plug (23) in the initial state does not contact the top surface of the cutting platform (13), and the bottom surface of the dust removal nozzle (21) in the initial state is lower than the bottom surface of the pressing base plate (20), for cleaning and dust removal before pressing the metal sheet.

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