Laser cutting device for sheet metal workpiece

Abstract

The invention relates to the technical field of laser cutting, in particular to a sheet metal workpiece laser cutting device which comprises a rack, a moving frame is slidably arranged on the rack, a mounting plate is slidably arranged on the moving frame, a driving assembly is arranged on the mounting plate, and a cutting mechanism is slidably arranged on the mounting plate. The driving assembly is used for driving the cutting mechanism to vertically move up and down, and a fixing mechanism is arranged at the top of the rack and used for limiting a to-be-cut sheet metal part. Through the arrangement of the heating drainage mechanism, it is ensured that the device continuously works in the cutting process, adhering slag existing in the cutting range is heated in the rotating process, the adhering slag is kept in the liquid state, and it is ensured that the molten adhering slag cannot adhere to the lower surface of a workpiece through continuous heating and guiding; and the water is smoothly guided into the receiving box to be collected.

Description

Technical Field

[0001] The 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 the material, causing it to melt, vaporize or ablate, thereby achieving precise cutting. It is widely used in the processing of metal and non-metal materials, and has the advantages of high efficiency, precision and small 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: 1. Since the energy of the laser beam is concentrated at the lower end of the workpiece, this area absorbs too much heat. This causes the cut material and the material near the slit to heat up rapidly and melt into a liquid state. These molten materials will flow along the lower surface of the workpiece under the action of gravity, and form irregular spherical or block-shaped attachments after cooling, affecting the surface quality of the workpiece and subsequent processing; 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, part of the slag will adhere to the lower surface of the workpiece to form residues; these residues not only affect the appearance of the workpiece, but may also affect the subsequent assembly or welding process. Summary of the invention

[0004] 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.

[0005] 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 arranged on the frame, a mounting plate is slidably arranged on the mobile frame, a driving assembly is arranged on the mounting plate, a cutting mechanism is slidably arranged on the mounting plate, the driving assembly is used to drive the cutting mechanism to move vertically up and down, a fixing mechanism is arranged on the top of the frame, which is used to limit 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 a receiving box with an upward opening is fixedly connected to the top of the slide rod; 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 a containing box, a hanging rod is fixedly connected to the top of the containing 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.

[0006] 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 groove is provided on the side wall of the storage tube, and a triangular block is fixedly connected to the inside of the groove, and after the triangular block is installed in the inside of the groove, drainage grooves 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 grooves.

[0007] Preferably, the drainage slots are opened in an inclined shape, and the two drainage slots form a V-shape.

[0008] Preferably, a plurality of adsorption mechanisms are arranged 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 matched with the arc tube is opened 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.

[0009] 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.

[0010] 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.

[0011] Preferably, two guide plates are fixedly connected to the interior 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 in the direction of the through hole.

[0012] Preferably, one end of the storage tube away from the receiving box is fixedly connected to a second motor, and an 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.

[0013] 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.

[0014] Preferably, the fixing mechanism comprises two sliding rods, the two sliding rods are respectively fixedly connected to two sides of the top of the frame, and two limit seats are slidably connected to the sliding rods.

[0015] Compared with the prior art, the present invention has the following beneficial effects: 1. The present invention starts the heating and drainage component before cutting by setting a heating and drainage mechanism 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 to keep it in a liquid state and guide it to flow to the receiving box. The heating and drainage mechanism continuously heats and guides the molten slag to ensure that it 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 is also 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.

[0016] 2. The present invention, through the arrangement of arc tubes and arc grooves, on the one hand, constructs a negative pressure space inside the storage tube, which helps to reduce the phenomenon of powder mist escaping and prevents the powder mist from diffusing into the working environment; on the other hand, through the construction of the 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 helps to reduce the amount of molten material that needs to be processed by the triangular heating block, thereby reducing the workload of the triangular heating block, and is conducive to the rapid cleaning of the remaining slag by the triangular heating block, which helps to prevent the inconvenience of cleaning due to condensation.

[0017] 3. The present invention arranges 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 beneficial to avoid 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 passing gap of the drainage slot will periodically increase and decrease; the increased gap combined with the through hole will produce 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, reducing the possibility of escape. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 The overall structure of the cutting device of the present invention is shown in FIG. Figure 1 .

[0019] Figure 2 The overall structure of the cutting device of the present invention is shown in FIG. Figure 2 .

[0020] Figure 3 It is a schematic structural diagram of the connection between the receiving box and the sliding rod of the present invention.

[0021] Figure 4 It is a schematic structural diagram of the present invention along the cross section of the receiving box.

[0022] Figure 5 It is a schematic diagram of the structure of the connection between the containing box and the hanging rod of the present invention.

[0023] Figure 6 It is a schematic diagram of the structure of the present invention along the cross section of the storage tube.

[0024] Figure 7 The structure of the present invention is further cut along the storage tube. Figure 1 .

[0025] Figure 8 The structure of the present invention is further cut along the storage tube. Figure 2 .

[0026] Fig. 9 It is a schematic diagram of the structure of the connection between the receiving box and the storage tube of the present invention.

[0027] Fig.10 For the present invention Fig. 9 A in the figure is an enlarged structural diagram.

[0028] In the figure: 1, frame; 2, moving 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 pipe; 23, arc groove; 24, arc intercepting plate; 25, through hole; 26, guide plate; 27, second motor; 28, heating roller; 29, swing plate; 30, bump; 31, sliding rod; 32, limit seat. DETAILED DESCRIPTION

[0029] The following description is used to disclose the present invention so that those skilled in the art can implement the present invention. The preferred embodiments described below are only examples, and those skilled in the art may think of other obvious variations.

[0030] 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: 1. Since the energy of the laser beam is concentrated at the lower end of the workpiece, this area absorbs too much heat. This causes the cut material and the material near the slit to heat up rapidly and melt into a liquid state. These molten materials will flow along the lower surface of the workpiece under the action of gravity, and form irregular spherical or block-shaped attachments after cooling, affecting the surface quality of the workpiece and subsequent processing; 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, part of the slag will adhere to the lower surface of the workpiece to form residues; these residues not only affect the appearance of the workpiece, but may also affect the subsequent assembly or welding process.

[0031] like Figures 1 to 10 The laser cutting device for sheet metal workpieces shown in the figure comprises a frame 1, a moving frame 2 is slidably arranged on the frame 1, a mounting plate 3 is slidably arranged on the moving frame 2, a driving assembly is arranged on the mounting plate 3, a cutting mechanism is slidably arranged 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 arranged 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 groove 6 is opened on the slide seat 5, 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; A first motor 9 is fixedly connected to the interior of the receiving box 8, a rotating rod 10 is fixedly connected to the output shaft end of the first motor 9, a receiving box 11 is fixedly connected to the end of the rotating rod 10 away from the first motor 9, a hanging rod 12 is fixedly connected to the top of the receiving box 11, and a plurality of heating and drainage mechanisms are provided on the outer wall of the hanging rod 12 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.

[0032] Specifically, the sheet metal to be cut is placed on the fixing mechanism, and the position of the sheet metal to be cut is limited by the fixing mechanism to ensure that the sheet metal to be cut will not move or deviate 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 performs precise cutting according to the pre-set cutting trajectory. Before preparing for cutting, first move the receiving box 8 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 through the slide rod 7, and the slide seat 5 slides on the slide rail 4, so that the receiving box 8 can flexibly adjust its position to adapt to cutting ranges of different sizes and shapes; when the cutting mechanism is started, the laser beam or other cutting tools will generate high temperature on the workpiece, causing the material to melt, gasify or ablate, and the heat, powder mist and molten slag formed will flow downward along the cutting seam and eventually fall into the receiving box 8 to be collected; 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 adhere 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 assembly will be started before cutting to ensure that it continues to work during the cutting process, and the rotating rod 10 is driven to rotate by the first motor 9. 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 will heat the slag existing in the cutting range during the rotation process, so that it remains in a liquid state, and guide it to flow to the receiving box 8; and the heating and drainage mechanism, through continuous heating and guiding, is conducive to ensuring that the molten slag does not adhere to the lower surface of the workpiece, but is smoothly introduced into the receiving box 8 for collection. In this process, the powder mist generated by the 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 the subsequent assembly or welding process.

[0033] 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. All of the above have mature applications in various industries and will not be disclosed in detail here.

[0034] It needs to be further explained that the slide rod 7 slides in the slide groove 6, and the sliding can be achieved by adding a fourth motor, a threaded rod, a threaded seat, etc., or by adding an electric push rod to move it, and it can also be pushed manually and the friction between the slide rod 7 and the slide groove 6 is used to limit the position. The same is true for the slide rail 4 and the slide seat 5, which are all existing mature technologies and will not be elaborated here.

[0035] 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. A groove 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 groove 16. After the triangular block 17 is installed in the inside of the groove 16, drainage grooves 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 grooves 18.

[0036] 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.

[0037] 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 tube 14, and the storage tube 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 tube 14 will also rotate, and the triangular block 17 and the triangular heating block 19 on the storage tube 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, at the beginning of the design, 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, so as 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 on the route to be melted The slag is heated and melted, which is beneficial to maintain the slag in a liquid state. Because drainage slots 18 are formed on both sides of the triangular block 17, the slag heated by the triangular heating block 19 to maintain a melted state 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 blockage; 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 to form irregular slag; and, if there is slag that has cooled and condensed 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.

[0038] As a further implementation scheme of the present invention, a plurality of adsorption mechanisms are arranged on the outer wall of the receiving box 11, and the adsorption mechanisms are located inside the receiving box 8. The adsorption mechanisms include an air pump 20, and 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 tube 22 is fixedly connected to the outer wall of the receiving box 11. An arc groove 23 matching the arc tube 22 is provided on the side of the storage tube 14 close to the receiving box 11, and the end of the arc tube 22 is located inside the storage tube 14.

[0039] 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 .

[0040] Specifically, in the above example, the slag is melted, drained and collected through the triangular heating block 19 and the drainage groove 18 to prevent condensation on the lower surface of the sheet metal to be cut. However, in the actual operation, 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 containing box 11 to the outside through the connecting pipe 21. Since the receiving box 11 is connected with 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 pollution of surrounding equipment and instruments by powder mist, thereby extending the service life of the equipment; on the other hand, through the construction of the 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 helpful to reduce the amount of molten material that the triangular heating block 19 needs to handle, thereby reducing the workload of the triangular heating block 19, and is conducive to the triangular heating block 19 to quickly clean up the remaining slag, which helps to prevent the inconvenience of cleaning caused by condensation, and the melted slag can smoothly enter the drainage slot 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; Furthermore, because a first torsion spring 15 is provided between the storage tube 14 and the hanging rod 12 to play a limiting role, and the connecting rod 13 is rotatably connected to the storage tube 14, in order to prevent the slag from being hard and 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 hard slag, 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 hard slag, it is helpful to ensure that the triangular heating block 19 has enough time to completely melt the slag, which helps to improve the treatment effect of the slag, ensure that it is completely liquefied and flows smoothly into the drainage groove 18, and help to avoid residues affecting subsequent processing; on the other hand, during the deflection of the triangular heating block 19, the first torsion spring 15 will exert a thrust; this thrust can not only enhance the physical contact of the triangular heating block 19 with the slag, but also help it to clean the slag more effectively.

[0041] As a further implementation scheme of the present invention, 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 faces 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.

[0042] Specifically, in order to more efficiently intercept and collect the powder mist and melted slag generated during the cutting process, an arc-shaped interception plate 24 is installed on the side wall of the storage tube 14; when the powder mist or melted slag mixed with dust enters the storage tube 14, they will first hit the arc-shaped interception plate 24, and be intercepted and collected in the storage tube 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 interception plate 24. Although the arc-shaped interception plate 24 intercepts most of the powder mist and molten metal, the airflow can still flow smoothly outward through the through hole 25, which is conducive to ensuring that the inside of the storage tube 14 can continue to maintain a negative pressure state; this helps to further attract powder mist and slag into the storage tube 14 and enhance the adsorption effect of the system; the through hole 25 is arranged at the edge of the arc-shaped interception plate 24, away from the main flow path of the molten metal, which effectively prevents the molten metal from 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.

[0043] As a further implementation scheme 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 in the direction of the through hole 25.

[0044] Specifically, by setting 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 the melt, so that they flow along a predetermined path toward the bottom of the arc-shaped interception plate 24, which is not only conducive to ensuring 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. In addition, the guide plate 26 cleverly blocks the direction of the through hole 25 to prevent the powder mist and the melt from flowing directly to the through hole 25 during the flow process; this design effectively avoids the blockage of the through hole 25, which is conducive to ensuring 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.

[0045] As a further embodiment of the present invention, the end of the storage tube 14 away from the receiving box 11 is fixedly connected to a second motor 27 , and the output shaft end of the second motor 27 passes through the receiving box 11 and is fixedly connected to a heating roller 28 , which is located between the two guide plates 26 .

[0046] 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 maintain fluidity; as the heating roller 28 rotates, new molten 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 diffusing to other parts; this design not only improves the dust collection efficiency, but also significantly reduces the dust pollution in the working environment and protects the health of the 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 plate 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 beneficial to further processing of the dust and reducing the possibility of its diffusion.

[0047] As a further implementation scheme 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.

[0048] 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 beneficial to ensure 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 circles, and then rotate counterclockwise for a certain number of circles; 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 guided 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, ensuring that these impurities are collected in a concentrated manner, reducing the possibility of escape.

[0049] As a further embodiment of the present invention, the fixing mechanism includes two sliding rods 31 , and the two sliding rods 31 are fixedly connected to two sides of the top of the frame 1 , respectively, and two limit seats 32 are slidably connected to the sliding rods 31 .

[0050] Specifically, the sheet metal to be cut is placed on four limit seats 32 to limit 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, which are not unique and will not be elaborated on here.

[0051] Working principle of the present invention: The sheet metal to be cut is placed on the fixing mechanism, and the position of the sheet metal to be cut is limited by the fixing mechanism to ensure that the sheet metal to be cut will not move or deviate during the cutting process. Then, 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 performs precise cutting according to the pre-set cutting trajectory; Before preparing for cutting, first move the receiving box 8 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 through the slide rod 7, and the slide seat 5 slides on the slide rail 4, so that the receiving box 8 can flexibly adjust its position to adapt to cutting ranges of different sizes and shapes; when the cutting mechanism is started, the laser beam or other cutting tools will generate high temperature on the workpiece, causing the material to melt, gasify or ablate, and the heat, powder mist and molten slag formed will flow downward along the cutting seam and eventually fall into the receiving box 8 to be collected; 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 adhere 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 assembly will be started before cutting to ensure that it continues to work during the cutting process, and the rotating rod 10 is driven to rotate by the first motor 9. 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 will heat the slag existing in the cutting range during the rotation process, so that it remains in a liquid state, and guide it to flow to the receiving box 8; and the heating and drainage mechanism, through continuous heating and guiding, is conducive to ensuring that the molten slag does not adhere to the lower surface of the workpiece, but is smoothly introduced into the receiving box 8 for collection. In this process, the powder mist generated by the 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 the subsequent assembly or welding process.

[0052] The above shows and describes the basic principles, main features and advantages of the present invention. Those skilled in the art should understand that the present invention is not limited to the above embodiments, and the above embodiments and descriptions only describe the principles of the present invention. The present invention may be subject to various changes and improvements without departing from the spirit and scope of the present invention, and these changes and improvements fall within the scope of the present invention claimed.

Claims

1. A sheet metal workpiece laser cutting device, comprising a frame (1), a movable frame (2) slidably disposed on the frame (1), a mounting plate (3) slidably disposed on the movable frame (2), a driving component disposed on the mounting plate (3), a cutting mechanism slidably disposed on the mounting plate (3), the driving component 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), a slide seat (5) is slidably connected between the two slide rails (4), a slide groove (6) is provided on the slide seat (5), 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); A first motor (9) is fixedly connected to the interior of the receiving box (8); a rotating rod (10) is fixedly connected to the output shaft end of the first motor (9); an end of the rotating rod (10) away from the first motor (9) is fixedly connected to a receiving box (11); a hanging rod (12) is fixedly connected to the top of the receiving box (11); and a plurality of heating and drainage mechanisms are provided in a circular array on the outer wall of the hanging rod (12) 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.

2. The laser cutting device for sheet metal workpiece according to claim 1, characterized in that: The heating and drainage mechanism comprises a connecting rod (13), one end of the connecting rod (13) is fixedly connected to the outer wall of the hanging rod (12), 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 groove (16) is provided on the side wall of the storage tube (14), a triangular block (17) is fixedly connected inside the groove (16), the triangular block (17) is installed inside the groove (16) to form drainage slots (18) 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).

3. The laser cutting device for sheet metal workpiece according to claim 2, characterized in that: The drainage slots (18) are opened in an inclined shape, and the two drainage slots (18) form a V-shape.

4. The laser cutting device for sheet metal workpiece according to claim 2, characterized in that: A plurality of adsorption mechanisms are arranged on the outer wall of the receiving box (11), and the adsorption mechanisms are located inside the receiving box (8). The adsorption mechanisms include an air pump (20), and 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). An arc-shaped groove (23) adapted to the arc-shaped tube (22) is provided on a side of the receiving tube (14) close to the receiving box (11), and an end of the arc-shaped tube (22) is located inside the receiving tube (14).

5. The laser cutting device for sheet metal workpiece according to claim 4, 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).

6. The laser cutting device for sheet metal workpiece according to claim 2, characterized in that: 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 directly opposite to the slot (16), and two groups of through holes (25) are symmetrically formed on the arc-shaped intercepting plate (24), and the two groups of through holes (25) are located at the edge.

7. The laser cutting device for sheet metal workpiece according to claim 6, 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 the dust from flowing in the direction of the through hole (25).

8. The laser cutting device for sheet metal workpiece according to claim 7, characterized in that: The end of the storage cylinder (14) away from the storage box (11) is fixedly connected to a second motor (27); the output shaft end of the second motor (27) passes through the storage box (11) and is fixedly connected to a heating roller (28); the heating roller (28) is located between the two guide plates (26).

9. The laser cutting device for sheet metal workpiece according to claim 8, 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).

10. The laser cutting device for sheet metal workpiece according to claim 1, 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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