A laser trimming device for a marine power distribution cabinet

Abstract

The application belongs to the technical field of laser cutting, and discloses a laser trimming device for a marine power distribution cabinet sheet metal, which comprises a main frame and a portal frame connected to the upper end of the main frame, a laser cutting head is installed on the side of the portal frame, a cutting frame is fixed in the middle of the main frame, support plates are distributed on the upper end of the cutting frame, guide pipes are connected to the two sides of the cutting frame, the lower end of the guide pipes is connected to a collecting box, and a support table is arranged in the middle of the cutting frame. The laser trimming device for the marine power distribution cabinet sheet metal comprises a stable negative pressure adsorption structure formed by the symmetrically distributed sealing pipes, pistons and movable guide pipes, and an array type triangular support plate flush with the support table, which not only ensures that the sheet metal part is uniformly stressed and placed flat, avoids clamping deformation or vibration displacement, and reduces the contact damage between the support surface and the workpiece, but also greatly improves the trimming size precision and assembly adaptability, and fully meets the high-precision requirements of offshore equipment on sheet metal parts.

Description

Technical Field

[0001] This invention relates to the field of laser cutting technology, specifically to a laser trimming device for sheet metal of offshore power distribution cabinets. Background Technology

[0002] As a core power distribution device in marine engineering and ship electrical systems, offshore switchboards require sheet metal structural components with high dimensional accuracy, strong corrosion resistance, and stable assembly adaptability to cope with harsh service environments such as salt spray, humidity, and vibration at sea. The edge precision of sheet metal parts directly affects the sealing performance, electrical insulation safety, and overall assembly efficiency of the switchboard. Therefore, laser trimming technology, due to its advantages such as high cutting precision and small heat-affected zone, has become the mainstream process for edge processing of sheet metal parts for offshore switchboards.

[0003] However, existing laser trimming equipment for sheet metal of offshore power distribution cabinets still has some problems in use:

[0004] A sheet metal laser cutting device, as described in Chinese Patent Application No. CN202222398700.3, includes a machine tool, an X-axis moving mechanism, a Y-axis moving mechanism, a Z-axis moving mechanism, a laser cutting head, and a fine-tuning mechanism. The X-axis moving mechanism is mounted on the machine tool; the Y-axis moving mechanism is mounted on the X-axis moving mechanism and moves along the X-axis under the drive of the X-axis moving mechanism; the Z-axis moving mechanism is mounted on the Y-axis moving mechanism and moves along the Y-axis under the drive of the Y-axis moving mechanism; the laser cutting head is mounted on the Z-axis moving mechanism and moves along the Z-axis under the drive of the Z-axis moving mechanism; the fine-tuning mechanism is located between the Y-axis moving mechanism and the Z-axis moving mechanism, and drives the laser cutting head to move along the X-axis, thereby adjusting the position of the laser cutting head on the X-axis.

[0005] However, existing laser cutting equipment leaves the finished product and waste on the same plane after cutting, making it inconvenient to pick them up. At the same time, the debris and waste generated during cutting are difficult to clean up.

[0006] To address the aforementioned issues, an innovative design was developed based on the existing sheet metal laser trimming equipment for offshore power distribution cabinets. Summary of the Invention

[0007] The purpose of this invention is to provide a laser trimming device for sheet metal of offshore power distribution cabinets, so as to solve the problem mentioned in the background art that the finished product and waste are placed on the same plane after the existing laser cutting equipment is cut, which is inconvenient to handle.

[0008] To achieve the above objectives, the present invention provides the following technical solution: a sheet metal laser trimming device for offshore power distribution cabinets, comprising a main frame and a gantry frame connected to its upper end, a laser cutting head installed on the side of the gantry frame, a cutting frame fixed in the middle of the main frame, and a support plate distributed on the upper end of the cutting frame, guide pipes connected to both sides of the cutting frame, and a collection box connected to the lower end of the guide pipes;

[0009] A support platform is provided in the middle of the cutting frame, and a lifting and positioning mechanism is provided below the support platform. The lifting and positioning mechanism includes an electric push rod. The lifting and positioning mechanism controls the negative pressure adsorption positioning during the lifting and lowering of the sheet metal parts.

[0010] An electric push rod is installed at the lower end of the support platform, and a drive shaft is connected between the electric push rod and the support platform. A suction cup is installed on the support platform, and a movable guide tube is connected to the lower end of the suction cup. A sealing tube is set below the cutting frame, and a piston is set inside the sealing tube.

[0011] An auxiliary feeding mechanism is set inside the cutting frame. The auxiliary feeding mechanism includes a feeding guide plate. The auxiliary feeding mechanism can quickly clean up cutting waste. The lifting and positioning mechanism provides rotational power for the feeding guide plate during the lifting and lowering process.

[0012] The feeding guide plate is set inside the cutting frame, and the side of the feeding guide plate is connected to the inside of the cutting frame. The lower inner end of the feeding guide plate is connected to the transmission shaft. The transmission shaft moves upward to drive the feeding guide plate to rotate and feed the material.

[0013] Preferably, X-axis slides are installed on the upper ends of both sides of the main frame, and the X-axis slides are connected to the gantry frame above. The upper end of the gantry frame is connected to a Z-axis slide, and the side of the Z-axis slide is connected to a Y-axis slide. The side of the Y-axis slide is connected to the laser cutting head.

[0014] By adopting the above technical solution, the laser cutting head can be flexibly adjusted in three-dimensional space through the three-axis linkage design of the X-axis slide, Z-axis slide and Y-axis slide. It can accurately adapt to the edge trimming requirements of different positions and curvatures of the sheet metal parts of the offshore power distribution cabinet, and greatly expand the processing range. The slide transmission structure has high positioning accuracy, which effectively makes up for the lack of flexibility of traditional adjustment mechanisms, improves the trimming accuracy of irregular shapes and large-sized sheet metal parts, and ensures assembly adaptability.

[0015] Preferably, a mounting plate is provided at the lower end of the cutting frame, the mounting plate is connected to the main frame, and the electric push rod is fixed to the mounting plate.

[0016] By adopting the above technical solution, the electric push rod is fixed to the main frame by the mounting plate. The installation structure is stable and reliable, and the displacement of the electric push rod will not affect the stability of the support platform. The mounting plate makes the assembly and maintenance of the electric push rod convenient, and at the same time provides a stable installation benchmark for components such as sealing tubes and transmission shafts, ensuring the coordination of the linkage operation of various mechanisms and indirectly improving the machining accuracy.

[0017] Preferably, the support plate is triangular in design, and when the electric push rod retracts, the upper surface of the support platform is flush with the upper surface of the support plate, and the support plate array is distributed on the side edge of the support platform.

[0018] The above technical solution provides a high-strength, stable triangular support plate structure that reduces the contact area with the sheet metal workpiece, preventing damage during cutting. When the electric push rod retracts, the support platform and the upper part of the support plate are flush, forming a flat support surface that ensures uniform stress on the sheet metal workpiece, reducing deformation caused by uneven clamping or support and guaranteeing the dimensional accuracy of trimming. The arrayed support plates provide a reserved channel for waste material discharge, solving the problems of traditional integral support platforms obstructing the cutting area and accumulating waste.

[0019] Preferably, the sealing tube is fixed to the mounting plate, the sealing tubes are symmetrically distributed on both sides of the support platform, the lower end of the movable guide tube passes through the cutting frame, the lower end of the movable guide tube extends into the interior of the sealing tube and connects with the piston, and the piston and the sealing tube are in sliding fit.

[0020] By adopting the above technical solution, the sliding sealing structure composed of the sealing tube, the movable guide tube, and the piston, combined with the transmission action of the electric push rod, can form a stable and controllable negative pressure adsorption environment with strong adsorption force, overcoming the defects of traditional adsorption devices that are prone to failure; the sealing tubes are symmetrically distributed on both sides of the support platform to ensure balanced adsorption force on sheet metal parts, effectively resist vibration interference during laser cutting, avoid displacement of sheet metal parts, and further improve trimming accuracy.

[0021] Preferably, the upper end of the suction cup is flush with the upper surface of the support platform, the upper end of the movable guide tube is connected to the suction cup, and a through hole is formed on the outer wall of the lower end of the movable guide tube.

[0022] Using the above technical solution, the upper end of the suction cup is flush with the support platform, ensuring that the sheet metal parts are placed on a flat surface, avoiding deformation of the sheet metal parts caused by uneven support surfaces, and ensuring processing accuracy; the movable guide tube communicates with the suction cup to achieve negative pressure adsorption, and the through hole at the lower end can achieve communication between the sealing tube and the suction cup, so that the adsorption force is continuously stable. At the same time, the suction cup adsorption method does not require rigid clamping, avoiding damage to the surface of the sheet metal parts, protecting their corrosion resistance and appearance quality, and adapting to the high requirements of sheet metal parts for offshore power distribution cabinets.

[0023] Preferably, two sets of feeding guide plates are symmetrically arranged, and the feeding guide plates are provided with strip-shaped locking grooves. The locking grooves are distributed in an array, and the locking grooves correspond to the distribution positions of the support plates.

[0024] Using the above technical solution, the symmetrically arranged feeding guide plates can achieve bidirectional and balanced discharge of waste materials. The strip-shaped locking grooves correspond to the positions of the support plates, avoiding interference between the feeding guide plates and the support structure and ensuring smooth operation of the mechanism. The array distribution of locking grooves can guide the cutting waste to slide down quickly, preventing the waste from getting stuck in the support gaps, solving the problems of poor feeding and the need for manual cleaning in traditional equipment, and improving processing efficiency and automation.

[0025] Preferably, the lower end of the feeding guide plate is fixed with a guide plate, the guide plate has a guide groove inside, the upper end of the transmission shaft is connected to a transmission plate, the two ends of the transmission plate are connected to guide shafts, and the guide shafts extend into the guide groove and slide in cooperation with them.

[0026] By adopting the above technical solution, the lifting motion of the electric push rod is transformed into the rotational motion of the unloading guide plate through the sliding cooperation of the guide plate, guide groove, transmission plate, and guide shaft. This achieves the linkage and automation of cutting and unloading, eliminating the need for an additional drive mechanism, simplifying the equipment structure, and reducing energy consumption. The sliding cooperation transmission is smooth, has strong vibration resistance, is suitable for marine operating environments, effectively avoids unloading jamming, ensures continuous and stable operation of the equipment, and further improves production efficiency.

[0027] Preferably, an air pump is installed at the upper end of the collection box, the air pump inlet end is connected to an air inlet pipe, the air inlet pipe extends into the collection box, a flue gas filter is installed at the air pump outlet end, and a filter cover is provided inside the collection box, covering the outside of the air pump inlet pipe.

[0028] The above-mentioned technical solution, which combines an air pump, a collection box, and a flue gas filter, can quickly extract fumes and metal dust generated by laser cutting. The filter cover prevents waste residue from entering the air pump, extending the service life of the equipment. The flue gas filter purifies harmful gases and dust, avoiding pollution of the ecological environment and meeting environmental protection regulations. The collection box simultaneously collects waste residue and treats flue gas, improving the cleanliness of the processing environment, reducing the burden of manual cleaning, and balancing environmental protection and processing efficiency.

[0029] Compared with the prior art, the beneficial effects of the present invention are as follows: The laser trimming equipment for sheet metal of offshore distribution cabinets, through the design of multiple sliding tables, allows the laser cutting head to achieve flexible adjustment in three-dimensional space, accurately adapting to the trimming needs of irregular edges and large-sized structures of sheet metal parts of distribution cabinets, effectively making up for the lack of flexibility of traditional adjustment mechanisms. At the same time, the symmetrically distributed sealing tubes, pistons, and movable guide tubes form a stable negative pressure adsorption structure, which, together with the array of triangular support plates flush with the support platform, ensures that the sheet metal parts are subjected to uniform force and placed flat, avoiding clamping deformation or vibration displacement, and also reduces contact damage between the support surface and the workpiece, greatly improving the trimming dimensional accuracy and assembly adaptability, and fully meeting the high precision requirements of offshore equipment for sheet metal parts.

[0030] 1. Relying on the transmission action of the electric push rod and the drive shaft, the lifting motion of the support platform is transformed into the rotational unloading of the unloading guide plate through the sliding cooperation of the guide plate, guide groove and drive plate. This achieves the linkage and automation of cutting and unloading, eliminating the need for an additional drive mechanism. This simplifies the equipment structure and avoids waste jamming. The array of support plates and the strip-shaped locking grooves of the unloading guide plate are precisely matched, providing a fast discharge channel for waste. Combined with the efficient collection of the guide pipe and collection box, it completely solves the problem of waste accumulation and manual cleaning required by traditional equipment. The various components of the equipment are modularly assembled through the mounting plate, making maintenance convenient, further shortening the working interval, and significantly improving the overall processing efficiency.

[0031] 2. The air pump at the top of the collection box, together with the flue gas filter and filter cover, constitutes a complete purification system. It can quickly extract metal dust and harmful fumes generated by laser cutting. After double filtration, the fumes are discharged in compliance with standards. This not only prevents impurities from adhering to the surface of the finished sheet metal and polluting the fragile marine ecosystem, but also complies with environmental regulations and protects the health of operators. The suction cup adsorption fixation does not require rigid clamping, avoiding damage to the surface of sheet metal parts and protecting their corrosion resistance and appearance quality. It is fully adapted to the service environment requirements of offshore power distribution cabinets. Attached Figure Description

[0032] Figure 1 This is a schematic diagram of the overall structure of the present invention;

[0033] Figure 2 This is a schematic diagram of the overall structure of the invention from another perspective;

[0034] Figure 3 This is a schematic diagram of the main frame and gantry structure of the present invention;

[0035] Figure 4 This is a schematic diagram of the cutting frame and support plate structure of the present invention;

[0036] Figure 5 This is a schematic diagram of the material guide tube and collection box structure of the present invention;

[0037] Figure 6 This is a schematic diagram of the cutting frame and support platform structure of the present invention;

[0038] Figure 7 This is a schematic diagram of the material feeding guide plate and support plate structure of the present invention;

[0039] Figure 8 This is a schematic diagram of the support platform and suction cup structure of the present invention;

[0040] Figure 9 This is a schematic diagram of the sealing tube and piston structure of the present invention;

[0041] Figure 10 For the present invention Figure 7 Enlarged structural diagram at point A in the middle;

[0042] Figure 11 This is a schematic diagram of the structure of Embodiment 2 of the present invention;

[0043] Figure 12 This is a schematic diagram of the structure of Embodiment 3 of the present invention.

[0044] In the diagram: 1. Main frame; 2. Gantry frame; 3. X-axis slide table; 4. Z-axis slide table; 5. Y-axis slide table; 6. Laser cutting head; 7. Cutting frame; 8. Support plate; 9. Guide tube; 10. Collection box; 11. Support platform; 12. Electric push rod; 13. Drive shaft; 14. Suction cup; 15. Movable guide tube; 16. Sealing tube; 17. Piston; 18. Discharge guide plate; 19. Guide plate; 20. Guide groove; 21. Transmission plate; 22. Guide shaft; 23. Air pump; 24. Filter cover. Detailed Implementation

[0045] 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.

[0046] Example 1, please refer to Figure 1-10This invention provides a technical solution: a laser trimming device for sheet metal of offshore power distribution cabinets, comprising a main frame 1 and a gantry 2 connected to its upper end. Mounting plates are welded to the four corners of the bottom of the main frame 1, with oblong holes for fixing to the working platform ground via expansion bolts. During installation, a level is used to calibrate the horizontality of the upper surface of the frame to prevent the sliding table's movement accuracy from being affected by frame tilt. A laser cutting head 6 is mounted on the side of the gantry 2, and a distance sensor is mounted on the side of the laser cutting head 6. The sensor's detection distance is 0-100mm, with an accuracy of ±0.01mm, real-time monitoring of the distance between the cutting head and the sheet metal surface. The height of the Y-axis sliding table 5 is automatically adjusted by a CNC system to ensure a constant cutting focal length, avoiding cutting accuracy deviations caused by unevenness or vibration of the sheet metal surface. X-axis sliding tables 3 are mounted on the upper ends of both sides of the main frame 1, connected to the gantry 2. A Z-axis sliding table 4 is connected to the upper end of the gantry 2, and a Y-axis sliding table 5 is connected to the side of the Z-axis sliding table 4. The side of the Y-axis sliding table 5 is connected to the laser cutting head 6. Each slide rail is fully enclosed by a dust cover, and the inside of the rails is regularly lubricated with grease. The X-axis slide 3 drives the gantry 2 to move along the length of the main frame 1, achieving wide-area trimming coverage. The Z-axis slide 4 drives the laser cutting head 6 to move along the crossbeam of the gantry 2, adapting to the trimming requirements in the width direction of the sheet metal parts. The Y-axis slide 5 adjusts the height of the laser cutting head 6, and, in conjunction with a distance sensor, achieves real-time focus calibration. During operation, cutting parameters such as laser power, cutting speed, and gas pressure are first set through the CNC system. After startup, the X and Z axes move in tandem along a preset trajectory, driving the laser cutting head 6 to complete the edge trimming of the sheet metal parts. The Y-axis makes real-time fine adjustments based on the distance sensor signal to ensure stable cutting quality. The entire process requires no manual intervention, achieving automated operation.

[0047] A cutting frame 7 is fixed in the middle of the main frame 1. The cutting frame 7 is made of stainless steel and is integrally welded into a rectangular frame structure. The frame edge is made of rectangular steel pipe. Support plates 8 are distributed on the upper end of the cutting frame 7. The support plates 8 are made of stainless steel plate and are laser-cut into isosceles triangle structures. The triangular structure has both high strength and lightweight characteristics, and can reduce the contact area with sheet metal parts. The support plates 8 are arrayed on the upper surface of the cutting frame 7 and are evenly arranged in a ring along the side edge of the support platform 11. The gap between two adjacent sets of support plates 8 forms a waste material discharge channel. The cutting frame 7 is connected to guide pipes 9 on both sides, and the lower end of the guide pipes 9 is connected to the collection box 10; a support platform 11 is set in the middle of the cutting frame 7, and a lifting and positioning mechanism is set below the support platform 11. The lifting and positioning mechanism includes an electric push rod 12. The lifting and positioning mechanism controls the negative pressure adsorption positioning during the lifting and lowering of the sheet metal parts; the electric push rod 12 is installed at the lower end of the support platform 11, and a transmission shaft 13 is connected between the electric push rod 12 and the support platform 11. The top end of the telescopic rod of the electric push rod 12 is rigidly connected to the lower end of the transmission shaft 13 through a coupling. An auxiliary unloading mechanism is provided inside the cutting frame 7. The auxiliary unloading mechanism includes an unloading guide plate 18, which can quickly clean up cutting waste. During the lifting and positioning process, the unloading guide plate 18 is provided with rotational power during lifting. The unloading guide plate 18 is located inside the cutting frame 7. The side of the unloading guide plate 18 is connected to the inside of the cutting frame 7. The lower end of the inner side of the unloading guide plate 18 is connected to the transmission shaft 13. The transmission shaft 13 moves upward to drive the unloading guide plate 18 to rotate and unload. A mounting plate is provided at the lower end of the cutting frame 7. The mounting plate is connected to the main frame 1. Mounting holes are opened at the four corners of the mounting plate and it is fixed to the crossbeam of the main frame 1 with bolts. The electric push rod 12 is fixed to the mounting plate. The support plate 8 has a triangular design. When the electric push rod 12 retracts, the upper surface of the support platform 11 is flush with the upper surface of the support plate 8. The support plates 8 are arranged in an array along the side edge of the support platform 11. Two sets of feeding guide plates 18 are symmetrically arranged. The feeding guide plates 18 have strip-shaped locking grooves. The locking grooves are arranged in an array and their positions correspond to those of the support plates 8. The width of the locking grooves and the support plates 8 is 3-5mm, which can prevent most particles from falling into the locking grooves and the gaps between the support plates 8. The lower end of the feeding guide plate 18 is fixed with a guide plate 19. The guide plate 19 has a guide groove 20 inside. The upper outer wall of the drive shaft rod 13 is connected to a drive plate 21. The two ends of the drive plate 21 are connected to guide shafts 22. The guide shafts 22 extend into the guide groove 20 and slide with it.Before laser trimming, the electric push rod 12 retracts, the support platform 11 is flush with the upper surface of the support plate 8, the unloading guide plate 18 is horizontal, and the locking groove precisely engages with the support plate 8. The sheet metal parts of the power distribution cabinet are placed on the support platform 11 and the support plate 8, ensuring that the edges of the workpiece are aligned with the trimming reference. The laser cutting head 6 trims according to the preset trajectory, and the generated waste falls onto the unloading guide plate 18. After cutting, the electric push rod 12 extends, the transmission shaft 13 drives the transmission plate 21 to rise, and the guide shaft 22 pushes the unloading guide plate 18 to rotate. The waste and slag on the surface of the unloading guide plate 18 roll towards the openings on both sides of the cutting frame 7 and slide down along the guide tube 9 into the collection box 10. After the electric push rod 12 pushes the support platform 11 upward, the trimming waste can be separated from the finished sheet metal parts and suspended in the air, facilitating subsequent unloading operations. After the blanking is completed, the sheet metal to be processed is placed back, the electric push rod 12 retracts, the blanking guide plate 18 is reset, and the support table 11 returns to the state of being flush with the support plate 8, waiting for the next processing.

[0048] A suction cup 14 is installed on the support platform 11. The suction cup 14 is an industrial-grade vacuum suction cup made of fluororubber, with a honeycomb-shaped anti-slip texture on the adsorption surface to increase contact friction with the sheet metal parts and prevent vibration displacement. The upper surface of the suction cup 14 is flush with the upper surface of the support platform 11 to ensure the sheet metal parts are placed flat. The lower end of the suction cup 14 is screwed into the upper end of the movable guide tube 15 via an internal thread, and PTFE sealing tape is wrapped around the connection to prevent negative pressure leakage. The lower end of the suction cup 14 is connected to the movable guide tube 15. A sealing tube 16 is installed below the cutting frame 7, and a piston 17 is installed inside the sealing tube 16. The sealing tube 16 is a seamless stainless steel pipe with end caps welded to both ends. An exhaust hole is opened in the middle of the lower end cap, and a guide tube clearance hole is opened in the center of the upper end cap. A nitrile rubber sealing ring is installed on the hole wall to achieve sliding sealing between the movable guide tube 15 and the sealing tube 16. The piston 17 is sized to match the sealing tube 16. The sealing tube 16 is fixed to the mounting plate and is symmetrically distributed on both sides of the support platform 11. The lower end of the movable guide tube 15 passes through the cutting frame 7 and extends into the interior of the sealing tube 16 to connect with the piston 17. The piston 17 and the sealing tube 16 are in sliding fit. The upper end of the suction cup 14 is flush with the upper surface of the support platform 11. The upper end of the movable guide tube 15 is connected to the suction cup 14, and a through hole is opened on the outer wall of the lower end of the movable guide tube 15. When the sheet metal workpiece to be processed is placed above the support platform 11, the electric push rod 12 retracts and drives the support platform 11 to descend until it is flush with the support plate 8. The movable guide tube 15 descends synchronously with the support platform 11, driving the piston 17 to slide downward in the sealing tube 16. The downward movement of the piston 17 creates a negative pressure chamber above the piston 17 in the sealing tube 16. The negative pressure is transmitted to the suction cup 14 through the through hole at the lower end of the movable guide tube 15, and atmospheric pressure is used to firmly adsorb the sheet metal workpiece onto the support platform 11. After the sheet metal workpiece is positioned, it undergoes laser trimming. Once the trimming is complete, the electric push rod 12 extends, the support table 11 rises, the piston 17 moves upward, the negative pressure inside the sealing tube 16 is released, and the suction cup 14 releases the workpiece, completing the adsorption-release cycle.

[0049] Working principle: First, installation and calibration are completed. The main frame 1 is fixed to the work platform with mounting plates and expansion bolts. The level of the upper surface is calibrated with a level to ensure the movement accuracy of the X-axis slide 3. The guide rails of the X-axis slide 3, Z-axis slide 4, and Y-axis slide 5 are covered with dust covers and regularly lubricated with grease to maintain stability. Next, workpiece positioning and adsorption are performed. The electric push rod 12 extends so that the support platform 11 is higher than the triangular support plate 8. The sheet metal part is then placed on the support platform 11. The support platform 11 is then controlled to descend synchronously with the electric push rod 12. The movable guide tube 15 drives the piston 17 to move down in the sealing tube 16 to create negative pressure. The vacuum suction cup 14 firmly adsorbs the workpiece to prevent vibration. After the dynamic displacement, the support platform 11 descends to the designated position and becomes flush with the support plate 8, with the edge of the sheet metal also flush with the support plate 8. Then, the laser trimming operation is started. After the CNC system presets the parameters, the cutting operation is performed. After the trimming is completed, the waste falls to the unloading guide plate 18. The electric push rod 12 extends and drives the transmission shaft rod 13, transmission plate 21 and guide shaft 22 to drive the unloading guide plate 18 to rotate. The waste slides down the guide pipe 9 to the collection box 10. At the same time, the support platform 11 rises to suspend the finished product. During the rise of the support platform 11, the piston 17 in the sealing pipe 16 moves upward to release the negative pressure, and the suction cup 14 releases the workpiece. The cut sheet metal part can then be removed and the sheet metal part to be cut can be placed again.

[0050] Example 2, please refer to Figure 11This invention provides a technical solution: The difference between this embodiment and Embodiment 1 is the addition of a flue gas and dust collection structure. The flue gas generated during laser trimming is collected and filtered before being discharged using a negative pressure method. An air pump 23 is installed at the top of the collection box 10. The air inlet of the air pump 23 is connected to an air inlet pipe that extends into the collection box 10. A flue gas filter is installed at the outlet of the air pump 23. An industrial-grade composite flue gas filter is selected, suitable for laser cutting flue gas treatment, and has a built-in activated carbon adsorption layer to adsorb harmful gases generated during cutting. A filter cover 24 is installed inside the collection box 10, covering the air inlet pipe of the air pump 23. The filter cover 24 is made of stainless steel, laser-cut and bent, with an overall rectangular frame structure. Circular through holes are evenly distributed on the side wall of the cover, which can both prevent metal waste from entering the air inlet channel and not affect the flow of flue gas. The filter hood 24 is fixed to the lower end of the air inlet pipe via a snap-fit ​​structure: an annular snap-fit ​​seat is welded to the slanted end of the air inlet pipe, and a matching elastic snap is provided on the inner side of the upper end of the filter hood 24. It can be fixed by pressing and disassembled by rotating, facilitating regular cleaning of dust adhering to the hood wall; the bottom of the hood is welded to prevent waste residue from entering from the bottom. When the laser cutting operation starts, the suction pump 23 starts simultaneously, forming a stable negative pressure inside the collection box 10. The fumes and metal dust generated by laser cutting enter the collection box 10 along with the waste residue through the guide pipe 9. Larger particles of waste residue settle to the bottom of the box due to gravity, while fine dust and fumes remain suspended in the upper part of the box. Under the action of negative pressure, the suspended dust and fumes are drawn into the air inlet pipe, pre-filtered by the filter hood 24, and the pre-purified fumes enter the suction pump 23. After being pressurized by the pump body, they are transported to the fumes filter, where harmful gases are adsorbed by the activated carbon adsorption layer and fine dust is filtered by the HEPA filter. The purified exhaust gas is discharged from the filter outlet in compliance with standards. The collection box 10 has a slag discharge port on its side. The waste slag collected inside needs to be cleaned regularly, and the filter cover 24 needs to be cleaned to avoid clogging and affecting the collection effect of flue gas or dust. At the same time, the flue gas filter needs to be replaced regularly to avoid affecting the flue gas filtration effect.

[0051] Example 3, please refer to Figure 12 The present invention provides a technical solution: The difference between this embodiment and embodiments one and two is that a strip-shaped baffle is welded to the lower end of the arrayed support plate 8. The size of the strip-shaped baffle is adapted to the size of the engaging groove opened inside the feeding guide plate 18. When the feeding guide plate 18 is attached to the bottom of the collection box 10, the strip-shaped baffle can fit with the engaging groove and make the surface of the feeding guide plate 18 form a complete plane, further reducing the amount of powder falling into the engaging groove and the gap between the support plate 8; making it easier for dust to be smoothly sucked into the collection box 10 and reducing residue.

[0052] The contents not described in detail in this specification are prior art known to those skilled in the art. Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and variations can be made to these embodiments without departing from the principles and spirit of the present invention. The scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A sheet metal laser trimming device for offshore power distribution cabinets, comprising a main frame (1) and a gantry frame (2) connected to its upper end, wherein a laser cutting head (6) is installed on the side of the gantry frame (2), characterized in that: The main frame (1) has a cutting frame (7) fixed in the middle, and a support plate (8) is distributed on the upper end of the cutting frame (7). The cutting frame (7) is connected to the two sides of the guide pipe (9), and the lower end of the guide pipe (9) is connected to the collection box (10). The cutting frame (7) is provided with a support platform (11) in the middle, and a lifting and positioning mechanism is provided below the support platform (11). The lifting and positioning mechanism includes an electric push rod (12). The lifting and positioning mechanism controls the negative pressure adsorption positioning during the lifting and lowering of the sheet metal parts. An electric push rod (12) is installed at the lower end of the support platform (11). A drive shaft (13) is connected between the electric push rod (12) and the support platform (11). A suction cup (14) is installed on the support platform (11). A movable guide tube (15) is connected to the lower end of the suction cup (14). A sealing tube (16) is set below the cutting frame (7). A piston (17) is set inside the sealing tube (16). An auxiliary feeding mechanism is set inside the cutting frame (7). The auxiliary feeding mechanism includes a feeding guide plate (18). The auxiliary feeding mechanism can quickly clean up cutting waste. The lifting and positioning mechanism provides rotational power to the feeding guide plate (18) during the lifting and lowering process. The feeding guide plate (18) is set inside the cutting frame (7). The side of the feeding guide plate (18) is connected to the inside of the cutting frame (7). The lower end of the inner side of the feeding guide plate (18) is connected to the transmission shaft (13). The transmission shaft (13) moves upward to drive the feeding guide plate (18) to rotate and feed the material. The lower end of the cutting frame (7) is provided with an installation plate, which is connected to the main frame (1), and the electric push rod (12) is fixed to the installation plate; The sealing tube (16) is fixed to the mounting plate. The sealing tubes (16) are symmetrically distributed on both sides of the support platform (11). The lower end of the movable guide tube (15) passes through the cutting frame (7). The lower end of the movable guide tube (15) extends into the interior of the sealing tube (16) and connects with the piston (17). The piston (17) and the sealing tube (16) are in sliding fit. The upper end of the suction cup (14) is flush with the upper surface of the support platform (11). The upper end of the movable guide tube (15) is connected to the suction cup (14). A through hole is opened on the outer wall of the lower end of the movable guide tube (15).

2. The sheet metal laser trimming equipment for offshore distribution cabinets according to claim 1, characterized in that: The upper ends of both sides of the main frame (1) are equipped with X-axis slides (3), the upper part of the X-axis slides (3) is connected to the gantry (2), the upper end of the gantry (2) is connected to the Z-axis slides (4), the side of the Z-axis slides (4) is connected to the Y-axis slides (5), and the side of the Y-axis slides (5) is connected to the laser cutting head (6).

3. The sheet metal laser trimming equipment for offshore power distribution cabinets according to claim 1, characterized in that: The support plate (8) is triangular in design. When the electric push rod (12) retracts, the upper surface of the support platform (11) is flush with the upper surface of the support plate (8). The support plates (8) are arranged in an array on the side edge of the support platform (11).

4. The sheet metal laser trimming equipment for offshore power distribution cabinets according to claim 1, characterized in that: Two sets of feeding guide plates (18) are symmetrically arranged. The feeding guide plates (18) have strip-shaped locking grooves. The locking grooves are distributed in an array, and the locking grooves correspond to the distribution positions of the support plates (8).

5. The sheet metal laser trimming equipment for offshore distribution cabinets according to claim 4, characterized in that: The lower end of the feeding guide plate (18) is fixed with a guide plate (19), and a guide groove (20) is opened inside the guide plate (19). The upper end of the transmission shaft rod (13) is connected to a transmission plate (21), and the two ends of the transmission plate (21) are connected to guide shafts (22). The guide shafts (22) extend into the guide groove (20) and slide in cooperation with it.

6. The sheet metal laser trimming equipment for offshore power distribution cabinets according to claim 1, characterized in that: The upper end of the collection box (10) is equipped with a vacuum pump (23), the air inlet end of the vacuum pump (23) is connected to an air inlet pipe, the air inlet pipe extends into the collection box (10), the air outlet end of the vacuum pump (23) is equipped with a flue gas filter, and a filter cover (24) is provided inside the collection box (10), the filter cover (24) is placed outside the air inlet pipe of the vacuum pump (23).

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