Laser cutting device for sheet metal workpieces

Abstract

The present invention relates to the field of laser cutting technology, and in particular to a laser cutting device for sheet metal workpieces, comprising a frame, a movable frame slidably provided on the frame, a mounting plate slidably provided on the movable frame, a driving assembly provided on the mounting plate, a cutting mechanism slidably provided on the mounting plate, the driving assembly being used to drive the cutting mechanism to move vertically up and down, and a fixing mechanism being provided on the top of the frame for limiting the sheet metal workpiece to be cut; the present invention ensures that it continues to work during the cutting process by setting a heating and drainage mechanism, and heats the slag present in the cutting range during the rotation process to keep it in a liquid state, and through continuous heating and guiding, it is beneficial to ensure that the molten slag does not adhere to the lower surface of the workpiece, but is smoothly introduced into the receiving box for collection.

Description

Technical Field

[0001] The present invention relates to the technical field of laser cutting, and in particular to a laser cutting device for sheet metal workpieces. Background Art

[0002] Laser cutting is a technology that uses a high-energy-density laser beam to locally heat a material, causing it to melt, vaporize, or ablate, thereby achieving precise cutting. It is widely used in the processing of both metal and non-metallic materials, offering advantages such as high efficiency, precision, and a minimal heat-affected zone.

[0003] During the laser cutting process of sheet metal parts, if the cutting position is set too far forward (i.e. the focus is in front of the cutting point), the following problems may occur:

[0004] 1. Because the laser beam energy is concentrated at the lower end of the workpiece, this area absorbs excessive heat. This causes the material being cut and the material near the kerf to heat up rapidly and melt into a liquid state. This molten material flows along the lower surface of the workpiece under the action of gravity, forming irregular spherical or lumpy attachments after cooling, affecting the surface quality of the workpiece and subsequent processing.

[0005] 2. At the end of cutting, the laser stops irradiating instantly, and the temperature under the plate drops sharply. At this time, although the auxiliary gas (such as compressed air or inert gas) is still blowing the cut seam, the temperature drops too quickly and the gas cannot completely blow away all the slag in time. As a result, some slag will adhere to the lower surface of the workpiece, forming residues. These residues not only affect the appearance of the workpiece, but may also affect subsequent assembly or welding processes. Summary of the Invention

[0006] The purpose of the present invention is to solve the shortcomings of the prior art and to propose a laser cutting device for sheet metal workpieces.

[0007] To achieve the above purpose, the technical solution adopted by the present invention is: a sheet metal processing part laser cutting device, comprising a frame, a mobile frame is slidably provided on the frame, a mounting plate is slidably provided on the mobile frame, a driving assembly is provided on the mounting plate, a cutting mechanism is slidably provided on the mounting plate, and the driving assembly is used to drive the cutting mechanism to move vertically up and down, a fixing mechanism is provided on the top of the frame, for limiting the sheet metal to be cut, slide rails are fixedly connected to both side walls of the frame, a slide seat is slidably connected between the two slide rails, a slide slot is provided on the slide seat, a slide rod is slidably connected to the inside of the slide slot, and the top of the slide rod is fixedly connected to a receiving box with an upward opening;

[0008] A first motor is fixedly connected to the interior of the receiving box, a rotating rod is fixedly connected to the output shaft end of the first motor, an end of the rotating rod away from the first motor is fixedly connected to the receiving box, a hanging rod is fixedly connected to the top of the receiving box, and a plurality of heating and drainage mechanisms are provided on the outer wall of the hanging rod in a circular array for draining and cleaning slag attached to the lower surface of the workpiece during the cutting process of the sheet metal to be cut by the cutting mechanism.

[0009] Preferably, the heating and drainage mechanism includes a connecting rod, one end of the connecting rod is fixedly connected to the outer wall of the hanging rod, and the other end of the connecting rod is rotatably connected to a storage tube, and a first torsion spring is fixedly connected between the storage tube and the hanging rod, and the first torsion spring is sleeved on the outer wall of the connecting rod, and a slot is provided on the side wall of the storage tube, and a triangular block is fixedly connected to the inside of the slot, and after the triangular block is installed in the inside of the slot, drainage slots are formed on both sides thereof, and a triangular heating block is fixedly connected to the triangular block, and the triangular heating block is located between the two drainage slots.

[0010] Preferably, the drainage slots are opened in an inclined shape, and the two drainage slots form a V shape.

[0011] Preferably, a plurality of adsorption mechanisms are provided on the outer wall of the receiving box, and the adsorption mechanisms are located inside the receiving box. The adsorption mechanisms include an air pump, and the air pump is fixedly connected to the outer wall of the receiving box. The air inlet of the air pump is fixedly connected to the receiving box through a connecting pipe. An arc tube is fixedly connected to the outer wall of the receiving box, and an arc groove adapted to the arc tube is provided on the side of the receiving tube close to the receiving box, and the end of the arc tube is located inside the receiving tube.

[0012] Preferably, the length of the arc-shaped groove is greater than the length of the arc-shaped tube, and the arc-shaped tube can slide inside the arc-shaped groove.

[0013] Preferably, an arc-shaped intercepting plate is fixedly connected to the inner wall of the storage tube, the lowest point of the arc-shaped intercepting plate is opposite to the slot, and two groups of through holes are symmetrically opened on the arc-shaped intercepting plate, and the two groups of through holes are located at the edge.

[0014] Preferably, two guide plates are fixedly connected to the inside of the storage tube, and the two guide plates are respectively located on both sides of the drainage groove. When the dust flows through the drainage groove to the lowest point of the arc-shaped intercepting plate, the guide plates are used to prevent the dust from flowing toward the through hole.

[0015] Preferably, the end of the storage tube away from the receiving box is fixedly connected to a second motor, and the output shaft end of the second motor passes through the receiving box and is fixedly connected to a heating roller, and the heating roller is located between the two guide plates.

[0016] Preferably, a swing plate is rotatably connected to the triangular block, and the swing plate is located directly above the two heating rollers. A protrusion is fixedly connected to the outer wall of the heating roller, and the protrusion cooperates with the swing plate.

[0017] Preferably, the fixing mechanism includes two sliding rods, the two sliding rods are fixedly connected to two sides of the top of the frame respectively, and two limit seats are slidably connected to the sliding rods.

[0018] Compared with the prior art, the present invention has the following beneficial effects:

[0019] 1. The present invention sets a heating and drainage mechanism, which starts the heating and drainage component before cutting to ensure that it continues to work during the cutting process. The heating and drainage mechanism heats the slag in the cutting range during rotation, keeps it in a liquid state, and guides it to flow to the receiving box. The heating and drainage mechanism continuously heats and guides the molten slag, which helps to ensure that the molten slag does not adhere to the lower surface of the workpiece, but is smoothly introduced into the receiving box for collection. In this process, the powder mist generated by cutting will also be collected and processed by the heating and drainage mechanism, which not only ensures the surface quality of the workpiece, but also provides convenience for subsequent assembly or welding processes.

[0020] 2. The present invention provides an arc tube and an arc groove. On the one hand, by constructing a negative pressure space inside the storage tube, it is helpful to reduce the phenomenon of powder mist escaping and prevent the powder mist from diffusing into the working environment; on the other hand, by constructing a negative pressure space, the formation of the negative pressure space enables the slag flowing to the lower surface of the sheet metal to be cut during the cutting process to be adsorbed and collected in the storage tube; this not only helps to reduce the accumulation of slag on the lower surface of the workpiece, but also reduces the difficulty of subsequent cleaning. By adsorbing the slag through negative pressure, it is helpful to reduce the amount of molten material that the triangular heating block needs to process, thereby reducing the workload of the triangular heating block, and is beneficial to the triangular heating block to quickly clean up the remaining slag, which helps to prevent the inconvenience of cleaning due to condensation.

[0021] 3. The present invention adopts the setting of the swing plate. On the one hand, when the swing plate is tilted, the liquid or powder mist accumulated thereon will be directed to the heating roller, ensuring that these substances can be further processed by the heating roller, which is conducive to avoiding their long-term accumulation on the swing plate; on the other hand, due to the change in the tilt angle of the swing plate, the passage gap of the drainage slot will periodically increase and decrease; the increased gap combined with the through hole will generate a stronger negative pressure adsorption force, which can more effectively capture and adsorb dust and melt, ensuring that these impurities are collected in a concentrated manner, and reducing the possibility of escape. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] Figure 1 The overall structure of the cutting device of the present invention is shown in FIG. Figure 1.

[0023] Figure 2 The overall structure of the cutting device of the present invention is shown in FIG. Figure 2 .

[0024] Figure 3 It is a structural schematic diagram of the connection between the receiving box and the sliding rod of the present invention.

[0025] Figure 4 It is a structural schematic diagram of the present invention along the cross section of the receiving box.

[0026] Figure 5 It is a structural schematic diagram of the connection between the storage box and the hanging rod of the present invention.

[0027] Figure 6 It is a schematic structural diagram of the present invention along the cross section of the storage tube.

[0028] Figure 7 This is a schematic diagram of the structure of the present invention after further sectioning along the storage tube Figure 1 .

[0029] Figure 8 This is a schematic diagram of the structure of the present invention after further sectioning along the storage tube Figure 2 .

[0030] Figure 9 It is a structural schematic diagram of the connection between the receiving box and the storage tube of the present invention.

[0031] Figure 10 For the present invention Figure 9 A in the figure is an enlarged structural diagram.

[0032] In the figure: 1. frame; 2. movable frame; 3. mounting plate; 4. slide rail; 5. slide seat; 6. slide groove; 7. slide rod; 8. receiving box; 9. first motor; 10. rotating rod; 11. receiving box; 12. hanging rod; 13. connecting rod; 14. storage tube; 15. first torsion spring; 16. slot; 17. triangular block; 18. drainage notch; 19. triangular heating block; 20. air pump; 21. connecting pipe; 22. arc tube; 23. arc groove; 24. arc intercepting plate; 25. through hole; 26. guide plate; 27. second motor; 28. heating roller; 29. ​​swing plate; 30. protrusion; 31. sliding rod; 32. limit seat. DETAILED DESCRIPTION

[0033] The following description is intended to disclose the present invention so that those skilled in the art can implement the present invention. The preferred embodiments described below are merely examples, and those skilled in the art may conceive of other obvious variations.

[0034] Application scenario: During the laser cutting process of sheet metal parts, if the cutting position is set too far forward (i.e. the focus is in front of the cutting point), the following problems may occur:

[0035] 1. Because the laser beam energy is concentrated at the lower end of the workpiece, this area absorbs excessive heat. This causes the material being cut and the material near the kerf to heat up rapidly and melt into a liquid state. This molten material flows along the lower surface of the workpiece under the action of gravity, forming irregular spherical or lumpy attachments after cooling, affecting the surface quality of the workpiece and subsequent processing.

[0036] 2. At the end of cutting, the laser stops irradiating instantly, and the temperature under the plate drops sharply. At this time, although the auxiliary gas (such as compressed air or inert gas) is still blowing the cut seam, the temperature drops too quickly and the gas cannot completely blow away all the slag in time. As a result, some slag will adhere to the lower surface of the workpiece, forming residues. These residues not only affect the appearance of the workpiece, but may also affect subsequent assembly or welding processes.

[0037] like Figures 1 to 10 The laser cutting device for sheet metal workpieces shown in the figure includes a frame 1, a mobile frame 2 is slidably provided on the frame 1, a mounting plate 3 is slidably provided on the mobile frame 2, a driving assembly is provided on the mounting plate 3, a cutting mechanism is slidably provided on the mounting plate 3, the driving assembly is used to drive the cutting mechanism to move vertically up and down, a fixing mechanism is provided on the top of the frame 1, which is used to limit the sheet metal workpiece to be cut, slide rails 4 are fixedly connected to both side walls of the frame 1, a slide seat 5 is slidably connected between the two slide rails 4, a slide slot 6 is provided on the slide seat 5, a slide rod 7 is slidably connected to the inside of the slide slot 6, and a receiving box 8 with an upward opening is fixedly connected to the top of the slide rod 7;

[0038] The interior of the receiving box 8 is fixedly connected to a first motor 9, the output shaft end of the first motor 9 is fixedly connected to a rotating rod 10, the end of the rotating rod 10 away from the first motor 9 is fixedly connected to a receiving box 11, the top of the receiving box 11 is fixedly connected to a hanging rod 12, and the outer wall of the hanging rod 12 is provided with a plurality of heating and drainage mechanisms in a circular array, which are used to drain and clean the slag attached to the lower surface of the workpiece during the cutting process of the sheet metal to be cut.

[0039] Specifically, the sheet metal to be cut is placed on a fixing mechanism, and the position of the sheet metal to be cut is restricted by the fixing mechanism to ensure that the sheet metal to be cut does not move or deflect during the cutting process. Subsequently, the cutting mechanism is controlled by a driving member to adjust the position so that the cutting mechanism moves to a specified position. After preparation is completed, the cutting mechanism is controlled to start so that the cutting mechanism performs precise cutting according to a pre-set cutting trajectory.

[0040] Before preparing to cut, the receiving box 8 is first moved to the bottom of the cutting range to ensure that it can completely cover the entire cutting area; the receiving box 8 slides inside the slide groove 6 via the slide rod 7, and the slide 5 slides on the slide rail 4, so that the receiving box 8 can be flexibly adjusted to adapt to cutting ranges of different sizes and shapes; when the cutting mechanism is started, the laser beam or other cutting tool will generate high temperature on the workpiece, causing the material to melt, vaporize or ablate. The heat, powder mist and molten slag generated will flow downward along the cut and eventually fall into the receiving box 8 to be collected;

[0041] However, part of the molten material may flow to the lower surface of the workpiece under the action of gravity; if these materials solidify after the temperature drops, they may form irregular spherical or block-shaped attachments, which will stick to the lower surface of the workpiece and affect the subsequent assembly or welding process; in order to prevent this from happening, the heating and drainage component will be started before cutting to ensure that it continues to work during the cutting process, and the first motor 9 will drive the rotating rod 10 to rotate. The rotating rod 10 is connected to the receiving box 11, and the receiving box 11 is equipped with a hanging rod 12 and a heating and drainage mechanism. As the rotating rod 10 rotates, the receiving box 11 and the hanging rod 12 are connected to the receiving box 11. 12 also rotates synchronously, and the heating and drainage mechanism on the hanging rod 12 rotates accordingly; the heating and drainage mechanism heats the slag existing in the cutting range during the rotation process, keeps it in a liquid state, and guides it to flow to the receiving box 8; and the heating and drainage mechanism helps to ensure that the molten slag does not adhere to the lower surface of the workpiece through continuous heating and guidance, but is smoothly introduced into the receiving box 8 for collection. In this process, the powder mist generated by cutting will also be collected and processed by the heating and drainage mechanism, which not only ensures the surface quality of the workpiece, but also provides convenience for subsequent assembly or welding processes.

[0042] It should be noted that the driving assembly includes existing components such as a toothed chain and a third motor, and the cutting mechanism includes existing components such as a laser head. The above have mature applications in various industries and will not be disclosed in detail here.

[0043] It needs to be further explained that the slide rod 7 slides in the slide groove 6. The sliding can be achieved by adding a fourth motor, a threaded rod, a threaded seat, etc., or by adding an electric push rod. It can also be moved by manually pushing and using the friction between the slide rod 7 and the slide groove 6 to limit the position. The same is true for the slide rail 4 and the slide seat 5. They are all existing mature technologies and will not be elaborated here.

[0044] As a further embodiment of the present invention, the heating and drainage mechanism includes a connecting rod 13, one end of the connecting rod 13 is fixedly connected to the outer wall of the hanging rod 12, and the other end of the connecting rod 13 is rotatably connected to a storage tube 14, and a first torsion spring 15 is fixedly connected between the storage tube 14 and the hanging rod 12, and the first torsion spring 15 is sleeved on the outer wall of the connecting rod 13, and a slot 16 is provided on the side wall of the storage tube 14, and a triangular block 17 is fixedly connected to the inside of the slot 16. After the triangular block 17 is installed in the inside of the slot 16, drainage slots 18 are formed on both sides thereof, and a triangular heating block 19 is fixedly connected to the triangular block 17, and the triangular heating block 19 is located between the two drainage slots 18.

[0045] As a further embodiment of the present invention, the drainage slots 18 are opened in an inclined shape, and the two drainage slots 18 form a V-shape.

[0046] Specifically, before the hanging rod 12 rotates, the preheating is started by controlling the triangular heating block 19 to heat it to a certain degree; as the hanging rod 12 rotates, the connecting rod 13 is driven to rotate, and the connecting rod 13 is connected to the storage cylinder 14, and the storage cylinder 14 is connected to the triangular block 17 and the triangular heating block 19. As the hanging rod 12 rotates, the connecting rod 13 and the storage cylinder 14 will also rotate, and the triangular block 17 and the triangular heating block 19 on the storage cylinder 14 will also rotate. During the rotation of the triangular heating block 19, the vertex of the triangular heating block 19 will scrape off the slag on the lower surface of the sheet metal to be cut, and in order to prevent the triangular heating block 19 from damaging the lower surface of the sheet metal to be cut, a gap is left between the vertex part of the triangular heating block 19 and the lower surface of the sheet metal to be cut at the beginning of the design to prevent the lower surface of the sheet metal to be cut from being damaged during the rotation process; and during the rotation of the triangular heating block 19, the heated triangular heating block 19 can melt the slag to be melted on the travel path The slag is heated and melted, which is conducive to maintaining the slag in a liquid state, and because drainage slots 18 are formed on both sides of the triangular block 17, the slag heated and maintained in a melted state by the triangular heating block 19 will flow into the interior of the drainage slots 18 along the inclined surface of the triangular heating block 19, and the two drainage slots 18 are tilted to form a V-shape. The inclined slots can reduce the resistance of the fluid or particles during the flow process, making it easier to slide down or flow out along the inclined surface, for liquids with high viscosity or materials that are easy to solidify; the inclined slots can also reduce the accumulation of materials at the slots and prevent the occurrence of blockages; the inclined slot design can also reduce the slag phenomenon of materials at the edge of the slots; especially for the molten material generated during the cutting process, if the slot is horizontal, the molten material may adhere to the edge of the slot after cooling, forming irregular slag; and, if there is slag that has cooled and solidified on the lower surface of the sheet metal to be cut, the triangular heating block 19 can also melt it and then drain and collect it.

[0047] As a further implementation scheme of the present invention, a number of adsorption mechanisms are provided on the outer wall of the receiving box 11, and the adsorption mechanism is located inside the receiving box 8. The adsorption mechanism includes an air pump 20, which is fixedly connected to the outer wall of the receiving box 11. The air inlet of the air pump 20 is fixedly connected to the receiving box 11 through a connecting pipe 21. An arc-shaped tube 22 is fixedly connected to the outer wall of the receiving box 11. An arc-shaped groove 23 adapted to the arc-shaped tube 22 is provided on the side of the receiving tube 14 close to the receiving box 11, and the end of the arc-shaped tube 22 is located inside the receiving tube 14.

[0048] As a further embodiment of the present invention, the length of the arc-shaped groove 23 is greater than the length of the arc-shaped tube 22 , and the arc-shaped tube 22 can slide inside the arc-shaped groove 23 .

[0049] Specifically, in the above example, the slag is melted, drained and collected by the triangular heating block 19 and the drainage slot 18 to prevent condensation on the lower surface of the sheet metal to be cut. However, in the actual operation process, because powder mist is generated during the cutting process, if the powder mist escapes, it may cause harm to the human body and other parts. Therefore, during the heating process of the triangular heating block 19, the air pump 20 is started synchronously, and the air pump 20 continuously discharges the air inside the holding box 11 to the outside through the connecting pipe 21. Since the receiving box 11 is connected to the storage cylinder 14 through the arc tube 22, as the air is continuously discharged, a negative pressure space is gradually formed inside the storage cylinder 14. On the one hand, by constructing a negative pressure space inside the storage cylinder 14, the powder mist generated during the cutting process will be attracted by the negative pressure and enter the storage cylinder 14 through the drainage slot 18; this design is conducive to reducing the phenomenon of powder mist escaping, preventing the powder mist from diffusing into the working environment, protecting the health of the operators, and reducing the escape of powder mist not only helps to keep the working environment clean, but also helps to avoid the contamination of surrounding equipment and instruments by powder mist, thereby extending the service life of the equipment; on the other hand, through the constructed negative pressure space, the formation of the negative pressure space enables the slag flowing to the lower surface of the sheet metal to be cut during the cutting process to be adsorbed and collected in the storage cylinder 14; this not only helps to reduce the accumulation of slag on the lower surface of the workpiece, but also reduces the subsequent cleaning Difficulty, through negative pressure adsorption of slag, it is beneficial to reduce the amount of molten material that the triangular heating block 19 needs to process, thereby reducing the workload of the triangular heating block 19, and is beneficial to the triangular heating block 19 to quickly clean up the remaining slag, which helps to prevent the inconvenience of cleaning due to condensation, and the melted slag can smoothly enter the drainage groove 18 under the action of negative pressure, and finally be collected in the storage cylinder 14; thirdly, in the process of the powder mist flowing into the storage cylinder 14, the dust will adhere to the liquid melted by the triangular heating block 19 to form larger particles or clumps; this adhesion effect effectively suppresses the flying of dust, reduces the fine particles suspended in the air, and further improves the quality of the working environment. By suppressing the flying of dust, the system can more thoroughly collect and process various wastes generated during the cutting process, which helps to ensure that the working area is always kept clean and reduces the risk of secondary pollution.

[0050] Furthermore, because a first torsion spring 15 is provided between the storage cylinder 14 and the hanging rod 12 to act as a limiter, and the connecting rod 13 is rotatably connected to the storage cylinder 14, in order to prevent the slag from solidifying to a hard degree and being difficult to be melted by the triangular heating block 19 for a while, thereby affecting the triangular heating block 19 itself, after the triangular heating block 19 contacts the slag with a harder degree of solidification, it will push the triangular heating block 19 to rotate and cause the first torsion spring 15 to deflect. On the one hand, by increasing the contact time between the triangular heating block 19 and the slag with a harder degree of solidification, it is helpful to ensure that the triangular heating block 19 has enough time to completely melt the slag, which helps to improve the slag treatment effect, ensure that it is completely liquefied and flows smoothly into the drainage groove 18, which helps to avoid residue affecting subsequent processing; on the other hand, during the deflection of the triangular heating block 19, the first torsion spring 15 will apply a thrust; this thrust not only enhances the physical contact of the triangular heating block 19 with the slag, but also helps to help it clean the slag more effectively.

[0051] As a further embodiment of the present invention, an arc-shaped intercepting plate 24 is fixedly connected to the inner wall of the storage tube 14, and the lowest point of the arc-shaped intercepting plate 24 faces the slot 16. Two groups of through holes 25 are symmetrically opened on the arc-shaped intercepting plate 24, and the two groups of through holes 25 are located at the edge.

[0052] Specifically, in order to more efficiently intercept and collect the powder mist and melted slag generated during the cutting process, an arc-shaped intercepting plate 24 is installed on the side wall of the storage cylinder 14; when the powder mist or melted slag mixed with dust enters the storage cylinder 14, they will first hit the arc-shaped intercepting plate 24 and be intercepted and collected in the storage cylinder 14; thereby, the powder mist and slag can be uniformly treated to prevent them from escaping into the external environment, reducing potential hazards to operators and equipment; in addition, the through hole 25 is cleverly arranged at the edge of the arc-shaped intercepting plate 24. Although the arc-shaped intercepting plate 24 intercepts most of the powder mist and melt, the airflow can still flow outward smoothly through the through hole 25, which is conducive to ensuring that the inside of the storage cylinder 14 can maintain a negative pressure state; this helps to further attract powder mist and slag into the storage cylinder 14, enhancing the adsorption effect of the system; the through hole 25 is arranged at the edge of the arc-shaped intercepting plate 24, away from the main flow path of the melt, effectively avoiding the melt directly flowing into the through hole 25 and causing blockage. This design ensures smooth airflow, maintains the normal operation of the system, and reduces maintenance frequency and cleaning difficulty.

[0053] As a further embodiment of the present invention, two guide plates 26 are fixedly connected to the interior of the storage tube 14. The two guide plates 26 are respectively located on both sides of the drainage groove 18. When the dust flows through the drainage groove 18 to the lowest point of the arc-shaped intercepting plate 24, the guide plates 26 are used to prevent the dust from flowing toward the through hole 25.

[0054] Specifically, by setting up a guide plate 26, the powder mist and melt passing through the drainage slot 18 are further intercepted and guided. The guide plate 26 can accurately control the flow direction of the powder mist and melt, so that it flows along a predetermined path toward the bottom of the arc-shaped intercepting plate 24, which not only helps to ensure that the materials can be collected in a concentrated manner, but also reduces their disordered diffusion in the storage tube 14, thereby improving the collection efficiency. Moreover, the guide plate 26 cleverly blocks the direction of the through hole 25, preventing the powder mist and melt from flowing directly to the through hole 25 during the flow process; this design effectively avoids the through hole 25 from being blocked, which helps to ensure that the airflow can pass smoothly and maintain the stable formation of the negative pressure space; finally, during the flow of the liquid, part of the liquid will adhere to the guide plate 26 to form a layer of liquid film; when the powder mist passes by, it will be adhered to the liquid film to further process and fix the dust; this process not only reduces the amount of dust suspended in the air, but also reduces the difficulty of subsequent cleaning, thereby improving the cleaning effect of the overall system.

[0055] As a further embodiment of the present invention, the end of the storage tube 14 away from the storage box 11 is fixedly connected to a second motor 27, and the output shaft end of the second motor 27 passes through the storage box 11 and is fixedly connected to a heating roller 28, which is located between the two guide plates 26.

[0056] Specifically, during the cutting process, the second motor 27 is turned on synchronously, and the second motor 27 drives the heating roller 28 to rotate. The heating roller 28 contacts the side wall of the guide plate 26 during the rotation. On the one hand, the heating roller 28 not only has a heating function, but also ensures that the melted liquid remains in liquid state on its surface. When the melted liquid contacts the heating roller 28, due to the continuous heat supply, the liquid will not cool and solidify quickly, but will maintain fluidity; as the heating roller 28 rotates, new melted liquid will continuously turn out and cover the surface of the heating roller 28, forming a layer of flowing liquid film, which can effectively adhere to the residual powder mist, wrap it inside, and prevent the powder mist from spreading to other parts; this design not only improves the dust collection efficiency, but also significantly reduces dust pollution in the working environment and protects the health of operators. On the other hand, the heating roller 28 can melt the liquid adhered to the guide plate 26 during the rotation process, so that the bottom of the arc-shaped baffle flows, thereby helping to prevent excessive accumulation on the guide plate 26 and causing blockage, and as the new solution flows, it can continuously adhere to the dust, which is conducive to further processing of the dust and reducing the possibility of its diffusion.

[0057] As a further embodiment of the present invention, a swing plate 29 is rotatably connected to the triangular block 17, and the swing plate 29 is located directly above the two heating rollers 28. A protrusion 30 is fixedly connected to the outer wall of the heating roller 28, and the protrusion 30 cooperates with the swing plate 29.

[0058] Specifically, by arranging a swing plate 29 on the triangular block 17, the swing plate 29 can intercept and slow down the flow speed of dust and melt, preventing them from flowing into the arc-shaped intercepting plate 24 too quickly, which provides more time for the heating roller 28 to process these substances, which is conducive to ensuring that it can fully melt and adhere to the dust and reduce the formation of residues; the rotation direction of the heating roller 28 is set to rotate clockwise for a certain number of times and then rotate counterclockwise for a certain number of times; during the rotation process, the protrusion 30 on the heating roller 28 will contact the swing plate 29 and push it to swing and tilt. This swinging action has two main functions. On the one hand, when the swing plate 29 is tilted, the liquid or powder mist accumulated thereon will be directed to the heating roller 28, ensuring that these substances can be further processed by the heating roller 28, which helps to avoid their long-term accumulation on the swing plate 29; on the other hand, due to the change in the tilt angle of the swing plate 29, the passing gap of the drainage slot 18 will periodically increase and decrease; the increased gap combined with the through hole 25 will produce a stronger negative pressure adsorption force, which can more effectively capture and adsorb dust and melt, ensure that these impurities are collected in a concentrated manner, and reduce the possibility of escape.

[0059] As a further embodiment of the present invention, the fixing mechanism includes two sliding rods 31 , which are fixedly connected to both sides of the top of the frame 1 , and two limit seats 32 are slidably connected to the sliding rods 31 .

[0060] Specifically, the sheet metal to be cut is placed on four limit seats 32 to complete the limitation of the sheet metal to be cut. The limit seats 32 and the sliding rod 31 can be fixed by means of screw nuts or electromagnet adsorption, etc., which are not unique here and will not be elaborated in detail.

[0061] Working principle of the present invention:

[0062] The sheet metal to be cut is placed on the fixing mechanism, and the position of the sheet metal to be cut is restricted by the fixing mechanism to ensure that the sheet metal to be cut does not move or deflect during the cutting process. Subsequently, the cutting mechanism is controlled by the driving member to adjust the position so that the cutting mechanism moves to the specified position. After the preparation is completed, the cutting mechanism is controlled to start so that the cutting mechanism can perform precise cutting according to the pre-set cutting trajectory.

[0063] Before preparing to cut, the receiving box 8 is first moved to the bottom of the cutting range to ensure that it can completely cover the entire cutting area; the receiving box 8 slides inside the slide groove 6 via the slide rod 7, and the slide 5 slides on the slide rail 4, so that the receiving box 8 can be flexibly adjusted to adapt to cutting ranges of different sizes and shapes; when the cutting mechanism is started, the laser beam or other cutting tool will generate high temperature on the workpiece, causing the material to melt, vaporize or ablate. The heat, powder mist and molten slag generated will flow downward along the cut and eventually fall into the receiving box 8 to be collected;

[0064] However, part of the molten material may flow to the lower surface of the workpiece under the action of gravity; if these materials solidify after the temperature drops, they may form irregular spherical or block-shaped attachments, which will stick to the lower surface of the workpiece and affect the subsequent assembly or welding process; in order to prevent this from happening, the heating and drainage component will be started before cutting to ensure that it continues to work during the cutting process, and the first motor 9 will drive the rotating rod 10 to rotate. The rotating rod 10 is connected to the receiving box 11, and the receiving box 11 is equipped with a hanging rod 12 and a heating and drainage mechanism. As the rotating rod 10 rotates, the receiving box 11 and the hanging rod 12 are connected to the receiving box 11. 12 also rotates synchronously, and the heating and drainage mechanism on the hanging rod 12 rotates accordingly; the heating and drainage mechanism heats the slag existing in the cutting range during the rotation process, keeps it in a liquid state, and guides it to flow to the receiving box 8; and the heating and drainage mechanism helps to ensure that the molten slag does not adhere to the lower surface of the workpiece through continuous heating and guidance, but is smoothly introduced into the receiving box 8 for collection. In this process, the powder mist generated by cutting will also be collected and processed by the heating and drainage mechanism, which not only ensures the surface quality of the workpiece, but also provides convenience for subsequent assembly or welding processes.

[0065] The basic principles, main features, and advantages of the present invention are shown and described above. Those skilled in the art should understand that the present invention is not limited to the above embodiments. The above embodiments and descriptions only describe the principles of the present invention. Various changes and improvements are possible without departing from the spirit and scope of the present invention, and such changes and improvements fall within the scope of the invention as claimed.

Claims

1. A laser cutting device for sheet metal workpieces, comprising a frame (1), a movable frame (2) slidably provided on the frame (1), a mounting plate (3) slidably provided on the movable frame (2), a driving assembly provided on the mounting plate (3), a cutting mechanism slidably provided on the mounting plate (3), the driving assembly being used to drive the cutting mechanism to move vertically up and down, characterized in that: The top of the frame (1) is provided with a fixing mechanism for limiting the position of the sheet metal to be cut, and the two side walls of the frame (1) are fixedly connected with slide rails (4), and a slide seat (5) is slidably connected between the two slide rails (4), and a slide groove (6) is provided on the slide seat (5), and a slide rod (7) is slidably connected inside the slide groove (6), and a receiving box (8) with an upward opening is fixedly connected to the top of the slide rod (7); The receiving box (8) is fixedly connected to a first motor (9) inside, the output shaft end of the first motor (9) is fixedly connected to a rotating rod (10), the end of the rotating rod (10) away from the first motor (9) is fixedly connected to a receiving box (11), the top of the receiving box (11) is fixedly connected to a hanging rod (12), and the outer wall of the hanging rod (12) is provided with a plurality of heating and drainage mechanisms in a circumferential array for draining and cleaning slag attached to the lower surface of the workpiece during the cutting process of the sheet metal to be cut by the cutting mechanism; The heating and drainage mechanism includes a connecting rod (13), one end of the connecting rod (13) is fixedly connected to the outer wall of the hanging rod (12), and the other end of the connecting rod (13) is rotatably connected to a storage tube (14), a first torsion spring (15) is fixedly connected between the storage tube (14) and the hanging rod (12), the first torsion spring (15) is sleeved on the outer wall of the connecting rod (13), a slot (16) is provided on the side wall of the storage tube (14), a triangular block (17) is fixedly connected inside the slot (16), and after the triangular block (17) is installed inside the slot (16), drainage slots (18) are formed on both sides thereof, a triangular heating block (19) is fixedly connected to the triangular block (17), and the triangular heating block (19) is located between the two drainage slots (18); The drainage slots (18) are opened in an inclined shape, and the two drainage slots (18) form a V-shape; A plurality of adsorption mechanisms are provided on the outer wall of the receiving box (11), the adsorption mechanisms are located inside the receiving box (8), the adsorption mechanisms include an air pump (20), the air pump (20) is fixedly connected to the outer wall of the receiving box (11), the air inlet of the air pump (20) is fixedly connected to the receiving box (11) through a connecting pipe (21), an arc-shaped tube (22) is fixedly connected to the outer wall of the receiving box (11), and an arc-shaped groove (23) adapted to the arc-shaped tube (22) is opened on a side of the receiving tube (14) close to the receiving box (11), and the end of the arc-shaped tube (22) is located inside the receiving tube (14); An arc-shaped intercepting plate (24) is fixedly connected to the inner wall of the storage tube (14), the lowest point of the arc-shaped intercepting plate (24) is opposite to the slot (16), and two groups of through holes (25) are symmetrically opened on the arc-shaped intercepting plate (24), and the two groups of through holes (25) are located at the edge.

2. The laser cutting device for sheet metal workpieces according to claim 1, characterized in that: The length of the arc-shaped groove (23) is greater than the length of the arc-shaped tube (22), and the arc-shaped tube (22) is able to slide inside the arc-shaped groove (23).

3. The laser cutting device for sheet metal workpieces according to claim 2, characterized in that: Two guide plates (26) are fixedly connected to the interior of the storage cylinder (14), and the two guide plates (26) are respectively located on both sides of the drainage slot (18). When dust flows through the drainage slot (18) to the lowest point of the arc-shaped intercepting plate (24), the guide plates (26) are used to prevent dust from flowing in the direction of the through hole (25).

4. The laser cutting device for sheet metal workpieces according to claim 3, characterized in that: The end of the storage cylinder (14) away from the storage box (11) is fixedly connected to a second motor (27), and the output shaft end of the second motor (27) passes through the storage box (11) and is fixedly connected to a heating roller (28), and the heating roller (28) is located between the two guide plates (26).

5. The laser cutting device for sheet metal workpieces according to claim 4, characterized in that: A swing plate (29) is rotatably connected to the triangular block (17), and the swing plate (29) is located directly above the two heating rollers (28). A protrusion (30) is fixedly connected to the outer wall of the heating roller (28), and the protrusion (30) cooperates with the swing plate (29).

6. The laser cutting device for sheet metal workpieces according to claim 5, characterized in that: The fixing mechanism comprises two sliding rods (31), the two sliding rods (31) are respectively fixedly connected to two sides of the top of the frame (1), and two limit seats (32) are slidably connected to the sliding rods (31).

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