Cabin body laser cutting machine of low-pressure oxygen cabin

Abstract

The invention relates to the technical field of laser cutting machines, and discloses a low-pressure oxygen cabin body laser cutting machine which comprises a multi-degree-of-freedom platform and a welding frame connected with the multi-degree-of-freedom platform and further comprises a calibration plate, a vertical moving frame, a horizontal moving frame and a main shaft rotationally connected to the welding frame. The output shaft end of the servo motor is in transmission connection with the main shaft through a synchronous belt, a vertical transmission module for driving the vertical moving frame to move up and down in a reciprocating mode is installed on the welding frame, a horizontal transmission module for driving the horizontal moving frame to move left and right in a reciprocating mode is installed between the horizontal moving frame and the vertical moving frame, and the reciprocating displacement strokes of the horizontal moving frame and the vertical moving frame are adjustable. Through a bidirectional adjustable reciprocating vibration mechanism of the vertical moving frame and the horizontal moving frame and in combination with a dynamic stroke adjusting function, high-frequency micro-amplitude vibration is generated when a laser beam acts on a material, so that the molten material is efficiently discharged, the smoothness of a cutting surface is improved by more than 40%, and the slag adhering rate is reduced to be less than 15% of that of traditional equipment.

Description

Technical Field

[0001] The present invention relates to the technical field of laser cutting machines, and more particularly to a laser cutting machine for a low-pressure oxygen chamber. Background Art

[0002] Laser cutting technology is widely used in industrial manufacturing due to its high precision and high efficiency. However, existing laser cutting equipment still faces numerous technical bottlenecks in the processing of complex structures such as hypobaric oxygen chamber hulls. For example, patent publication number CN111468837B discloses a laser cutting machine with automatic sheet metal recycling. However, it suffers from significant deficiencies in cutting accuracy, thermal management, functional integration, and dynamic calibration. Specific issues are as follows: 1. Insufficient cutting accuracy and slag problems. During the cutting process of existing equipment, the slag is not discharged smoothly when the laser beam interacts with the material, resulting in a rough cutting surface and serious slag. Additional post-processing is required, affecting processing efficiency and finished product quality. 2. The heat-affected zone is too large. The concentrated heat of traditional laser cutting machines can easily cause local overheating, leading to problems such as thermal deformation of materials and changes in microstructure. In particular, the cutting effect on heat-sensitive materials is poor, limiting its application in precision component processing. 3. Lack of real-time monitoring and parameter adjustment capabilities, single equipment functions and poor adaptability, and insufficient vibration control and dynamic compensation; Based on this, the present invention provides a laser cutting machine for the cabin body of a low-pressure oxygen chamber to solve the technical problems raised in the above background technology. Summary of the Invention

[0003] In order to overcome the shortcomings of the existing technology, the present invention provides a cabin laser cutting machine for a low-pressure oxygen chamber. The present invention achieves a significant improvement in the smoothness of the cutting surface, a significant reduction in the slag rate, millimeter-level precision control of the cutting path, a reduction in the heat-affected zone, applicability for processing heat-sensitive materials, "detection-feedback-correction" full closed-loop control, and reduced changeover and debugging time through technologies such as a vertical moving frame and a translational moving frame with two-way adjustable reciprocating vibration mechanism and dynamic stroke adjustment, a multi-layer composite calibration plate, visual and fluorescence detection feedback, water-cooled rotary drum heat dissipation, multi-type laser nozzle rotation shells, and multi-degree-of-freedom platform linkage. It solves the problems of slag retention, thermal deformation, accumulated cutting errors, single function, and poor adaptability in the existing technology.

[0004] To achieve the above-mentioned purpose, the present invention provides the following technical solutions: a cabin laser cutting machine for a low-pressure oxygen chamber, comprising a multi-degree-of-freedom platform and a welding frame connected to the multi-degree-of-freedom platform, and also comprising a calibration plate, a vertical moving frame, a translation frame and a main shaft rotatably connected to the welding frame, a servo motor is installed on the welding frame, and the output shaft end of the servo motor is connected to the main shaft through a synchronous belt. A vertical transmission module for driving the vertical moving frame to move up and down is installed on the welding frame, and a horizontal transmission module for driving the translation frame to move left and right is installed between the translation frame and the vertical moving frame. The reciprocating strokes of the translation frame and the vertical moving frame are adjustable, and a rotation device is installed on the translation frame. It is equipped with a secondary shaft driven by the main shaft, a fixed column is fixedly installed on the vertical moving frame, and the rotating sleeve on the fixed column is provided with a rotating shell driven by the indexing motor. The rotating shell is respectively provided with a visual probe, a fluorescence detection system, a fluorescent marking nozzle and multiple laser nozzles, and the types of the multiple laser nozzles are different. A laser welder is fixedly installed on the fixed column at a position corresponding to the inner side of the rotating shell, and a welding gun section cooperating with the laser nozzle is fixedly provided on the laser welder. A fluorescent liquid supply assembly for supplying liquid to the fluorescent marking nozzle is also installed on the fixed column. The rotating sleeve on the welding gun section is provided with a water-cooled rotor driven by the secondary shaft, and a water-cooling assembly is provided in the water-cooled rotor.

[0005] As a preferred technical solution of the present invention, the multi-degree-of-freedom platform includes a base frame, a linear transmission module is installed on the base frame, the linear transmission module is connected to a moving seat, the moving seat is installed with a rotating plate driven by a first electric rotator, three-section electric crank arms are installed on the rotating plate, and the ends of the three-section electric crank arms are installed with a turntable driven by a second electric rotator, the welding frame is fixed on the turntable, and a central control host is installed on the base frame, and the data ends of the visual probe and the fluorescence detection system are both connected to the data of the central control host.

[0006] As a preferred technical solution of the present invention, two positioning magnetic blocks that are magnetically attracted to the calibration plate are installed on the base frame, and the calibration plate has a detection area with a predetermined cutting path, and the detection area contains at least one group of test patterns that can be laser cut, and the test patterns contain cross-shaped test patterns and annular test patterns. The central control host is used to collect the cutting width, cutting rate and cutting power parameters of the laser cutting machine when performing cutting in the detection area in real time, and the calibration plate contains a stainless steel layer, an acrylic layer and a ceramic coating arranged in sequence from the outside to the inside, and the thickness ratio of the stainless steel layer, the acrylic layer and the ceramic coating is 1:1.2:0.8.

[0007] As an optimal technical solution of the present invention, the vertical transmission module includes a pre-tightening frame and a top shaft rotatably mounted on the welding frame, the top shaft and the main shaft are both equipped with a first bevel gear, the two first bevel gears are meshed with each other, the top shaft is equipped with a first eccentric plate, the first follower ring bag is installed on the first eccentric plate, a first follower wheel is rotatably mounted on the vertical moving frame, the outer contour of the first follower ring bag is in rolling contact with the first follower wheel, and two vertical guide rods are installed on the vertical moving frame, and the two vertical guide rods are both slidably connected to the pre-tightening frame, and vertical springs are sleeved on the two vertical guide rods and at positions corresponding to the top of the pre-tightening frame, a vertical adjustment screw is rotatably mounted on the welding frame, and the vertical adjustment screw is transmission-connected to the pre-tightening frame.

[0008] Material toggling mechanism, its both sides respectively have a cylinder pressure, and the cylinder pressure bar connects swing arm, and the swing arm end face has hook portion, and a bar passes position between the end of two swing arms and the hook portion.

[0009] As a preferred technical solution of the present invention, the coupling shaft is fixedly provided with a first square groove with a top opening and a sliding connection with the main shaft, the coupling shaft and the bottom shaft are both equipped with second bevel teeth, the two second bevel teeth are meshed with each other, a square shaft is rotatably installed on the vertical moving frame, the interior of the secondary shaft is fixedly provided with a second square groove with a tail end opening and a sliding connection with the square shaft, the cross-sections of the main shaft, square shaft, first square groove and second square groove are all regular hexagons, and a third bevel tooth is installed at the tail end of the square shaft, and the third bevel tooth is transmission-connected to the second bevel tooth on the bottom shaft.

[0010] As a preferred technical solution of the present invention, the cross-sections of the flat guide rod and the vertical guide rod are both T-shaped, the interiors of the first follower ring bag and the second follower ring bag are filled with gas, and the first follower ring bag and the second follower ring bag are both made of wear-resistant rubber.

[0011] As a preferred technical solution of the present invention, the fluorescent liquid supply assembly includes a fluorescent liquid storage tank installed on a translation frame, a peristaltic pump is installed on the fluorescent liquid storage tank, a liquid separation ring cavity is fixedly opened on the fixed column, the liquid outlet port of the peristaltic pump is connected to the liquid separation ring cavity through a pump liquid tube, a driven rotating ring is rotatably installed on the outer side of the liquid separation ring cavity, a liquid delivery tube connected to the liquid separation ring cavity is installed on the driven rotating ring, and the other end of the liquid delivery tube is connected to the fluorescent marking nozzle.

[0012] As a preferred technical solution of the present invention, the water-cooling assembly includes a water-cooling chamber opened between the water-cooling rotor and the welding gun section, the water-cooling chamber is filled with water-cooling liquid, a fourth bevel gear is installed on the water-cooling rotor, a transmission bevel gear ring is installed on the secondary shaft, the transmission bevel gear ring is connected to the fourth bevel gear, fan blades are installed on the upper part of the water-cooling rotor, and a group of heat dissipation fins distributed in a circular array are installed on the outer periphery of the water-cooling rotor and at the position corresponding to the bottom of the fan blades.

[0013] As a preferred technical solution of the present invention, the laser outlet of the welding gun section is arranged directly below the rotation axis of the rotating shell, the axes of the laser nozzle, the visual probe and the fluorescent marker nozzle are all perpendicular to the rotation axis of the rotating shell, and the fluorescence detection system includes an optical sensor for capturing the fluorescent signal emitted by the fluorescent marker, a filter configured to filter out interference from ambient light, and an image recognition algorithm for processing the collected image to identify the position and shape of the fluorescent marker.

[0014] Compared with the prior art, the present invention has the following beneficial effects: 1. The present invention utilizes a bidirectionally adjustable reciprocating vibration mechanism of the vertical and horizontal frames, combined with a dynamic stroke adjustment function. When the laser beam interacts with the material, it generates high-frequency, micro-amplitude vibrations, promoting the efficient discharge of molten material. This improves the smoothness of the cut surface by more than 40%, and reduces the dross rate to less than 15% of traditional equipment. The multi-layer composite structure of the calibration plate simulates actual material properties. Combined with real-time feedback from the visual probe and fluorescence detection system, the central control host can dynamically correct the cutting power, rate, and vibration parameters to achieve millimeter-level precision control of the cutting path. This solves the problem of rough cut surfaces caused by slag retention in existing technologies and significantly reduces the number of post-processing steps.

[0015] 2. In the present invention, the up and down vibration of the vertical moving frame and the horizontal vibration of the translation frame work together to evenly disperse the laser energy on the material surface to avoid local overheating. The water-cooled rotor is driven by the secondary shaft to rotate at high speed, and the fan blades and heat dissipation fins form forced convection heat dissipation. The temperature of the welding gun section can be effectively lowered compared with the traditional water-cooling system. Through the dual optimization of vibration and heat dissipation, the range of the heat-affected zone is significantly reduced. It is particularly suitable for the precision processing of heat-sensitive materials such as titanium alloys and composite materials, and solves the problem of low finished product qualification rate caused by thermal deformation of traditional equipment.

[0016] 3. In the present invention, the fluorescent marking nozzle pre-marks the cutting path, and the fluorescence detection system accurately captures the fluorescence signal through filters and image recognition algorithms. Combined with the multi-dimensional image data of the visual probe, the central control host can analyze parameters such as cutting width and molten pool morphology in real time, and automatically adjust the laser power, vibration frequency and nozzle angle. Compared with the single-function design of traditional cutting machines, the present invention realizes the full closed-loop control of "detection feedback correction", which solves the problem of cutting error accumulation caused by the lack of real-time monitoring in the existing technology.

[0017] 4. The rotating shell of the present invention integrates various types of laser nozzles, which can be quickly switched through the indexing motor to adapt to the cutting requirements of cabins of different materials and thicknesses. The multi-degree-of-freedom platform realizes six-axis linkage of the welding frame through three-section electric crank arms and dual rotators, which can accurately locate the cutting sites of curved surfaces and special-shaped structures. The composite layer structure of the calibration plate can simulate the cutting characteristics of more than 90% of common materials, and complete the equipment performance calibration in advance. Compared with the defects of traditional equipment with single functions and poor adaptability, the present invention can reduce the replacement and debugging time by more than 70%. Figure 1 This is a schematic structural diagram of a laser cutting machine for a hypobaric oxygen chamber according to the present invention; Figure 2 Schematic diagram of the structure of the multi-degree-of-freedom platform of the present invention; Figure 3 This is a schematic structural diagram of the fluorescent liquid storage tank and translation frame of the present invention; Figure 4 For the present invention Figure 3 Schematic diagram of the local enlarged structure at A in the middle; Figure 5 This is a schematic structural diagram of the welding frame and laser nozzle of the present invention; Figure 6 It is a structural schematic diagram of the countershaft and the rotating housing of the present invention; Figure 7 For the present invention Figure 6 Schematic diagram of the local enlarged structure at B in the middle; Figure 8 This is a schematic structural diagram of the vertical guide rod and the transmission bevel gear ring of the present invention; Figure 9 Schematic diagram of the structure of the main shaft and vertical adjustment screw rod of the present invention; Figure 10 For the present invention Figure 9 Schematic diagram of the local enlarged structure at C in the middle; Figure 11 Schematic diagram of the cross-sectional structure of the first follower ring capsule and the vertical adjustment screw rod of the present invention; Figure 12 For the present invention Figure 11 Schematic diagram of the local enlarged structure at point D in the middle.

[0018] In the figure: 1. Welding frame; 2. Calibration plate; 3. Vertical frame; 4. Translation frame; 5. Main spindle; 6. Servo motor; 7. Sub-spindle; 8. Fixed column; 9. Indexing motor; 10. Rotating shell; 11. Vision probe; 12. Fluorescence detection system; 13. Fluorescent marking nozzle; 14. Laser nozzle; 15. Laser welder; 16. Welding gun section; 17. Water-cooled rotary drum; 18. Fluorescent liquid storage tank; 19. Heat dissipation fins; 20. Fan blades; 21. Base frame; 22. Linear drive module; 23. Shifting seat; 24. Rotating plate; 25. Three-section electric crank arm ; 26. Turntable; 27. Central control host; 28. Top shaft; 29. ​​Preload frame; 30. First eccentric plate; 31. First follower ring capsule; 32. First follower wheel; 33. Vertical guide rod; 34. Vertical spring; 35. Vertical adjustment screw; 36. Pressure frame; 37. Coupling; 38. Bottom shaft; 39. Horizontal adjustment screw; 40. Second eccentric plate; 41. Second follower ring capsule; 42. Second follower wheel; 43. Flat guide rod; 44. Flat spring; 45. Square shaft; 46. Driven rotating ring; 47. Liquid separation ring cavity; 48. Transmission bevel gear ring. DETAILED DESCRIPTION

[0019] The following will clearly and completely describe the technical solutions in the embodiments of the present invention in conjunction with the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0020] like Figures 1 to 12 As shown, the present invention provides a laser cutting machine for a low-pressure oxygen chamber, comprising a multi-degree-of-freedom platform and a welding frame 1 connected to the multi-degree-of-freedom platform; The multi-degree-of-freedom platform includes a base frame 21, on which a linear transmission module 22 is mounted, which is in transmission connection with a moving seat 23, on which a rotating plate 24 driven by a first electric rotator is mounted, on which a three-section electric crank arm 25 is mounted, and at the end of which a turntable 26 driven by a second electric rotator is mounted, the welding frame 1 is fixed on the turntable 26, and a central control host 27 is mounted on the base frame 21; The linear transmission module 22 in the multi-degree-of-freedom platform can drive the transfer base 23 to move linearly on the base frame 21. The first electric rotator drives the rotary plate 24 to rotate. The three-section electric crank arm 25 can flexibly adjust the position and posture of the welding frame 1, allowing the laser cutting machine to accurately locate different cutting positions on the low-pressure oxygen chamber body. This solves the problem of inflexible positioning of traditional cutting machines. Compared with existing technologies, it greatly improves the cutting accuracy and efficiency and can meet the cutting needs of low-pressure oxygen chamber bodies of various complex shapes. It also includes a calibration plate 2, a vertical moving frame 3, a translation frame 4 and a main shaft 5 rotatably connected to the welding frame 1; Two positioning magnets are mounted on the chassis 21 and are magnetically attracted to the calibration plate 2. The calibration plate 2 has a detection area with a predetermined cutting path. The detection area includes at least one set of test patterns that can be laser cut. The test patterns include a cross-shaped test pattern and a ring-shaped test pattern. The central control host 27 is used to collect the cutting width, cutting rate, and cutting power parameters of the laser cutting machine when performing cutting in the detection area in real time. The calibration plate 2 includes a stainless steel layer, an acrylic layer, and a ceramic coating arranged in sequence from the outside to the inside. The thickness ratio of the stainless steel layer, the acrylic layer, and the ceramic coating is 1:1.2:0.8. The calibration plate 2 is magnetically fixed to the base frame 21 via a positioning magnet. The test pattern in its detection area can be used for cutting testing by the laser cutting machine. The central control host 27 cooperates with the visual probe 11 to collect cutting width, cutting rate and cutting power parameters in real time. The different thickness ratios of the stainless steel layer, acrylic layer and ceramic coating can simulate the characteristics of various materials. This solves the problem of being unable to monitor and adjust cutting parameters in real time. Compared with the existing technology, the cutting performance of the laser cutting machine can be tested and calibrated in advance to ensure the cutting quality when cutting the low-pressure oxygen chamber. A servo motor 6 is installed on the welding frame 1, and the output shaft end of the servo motor 6 is connected to the main shaft 5 through a synchronous belt; A vertical transmission module for driving the vertical moving frame 3 to move up and down is installed on the welding frame 1, and a horizontal transmission module for driving the horizontal moving frame 4 to move left and right is installed between the horizontal moving frame 4 and the vertical moving frame 3. The horizontal and vertical moving strokes of the horizontal moving frame 4 and the vertical moving frame 3 are adjustable; A secondary shaft 7 driven by the main shaft 5 is rotatably mounted on the translation frame 4; The vertical transmission module includes a pre-tightening frame 29 and a top shaft 28 rotatably mounted on the welding frame 1, the top shaft 28 and the main shaft 5 are both equipped with first bevel teeth, the two first bevel teeth are meshed with each other, the top shaft 28 is equipped with a first eccentric plate 30, the first eccentric plate 30 is equipped with a first follower ring capsule 31, the vertical moving frame 3 is rotatably mounted with a first follower wheel 32, the outer contour of the first follower ring capsule 31 is in rolling contact with the first follower wheel 32, two vertical guide rods 33 are installed on the vertical moving frame 3, the two vertical guide rods 33 are both slidably connected to the pre-tightening frame 29, and vertical springs 34 are sleeved on the two vertical guide rods 33 and at positions corresponding to the top of the pre-tightening frame 29, a vertical adjustment screw rod 35 is rotatably mounted on the welding frame 1, and the vertical adjustment screw rod 35 is transmission-connected to the pre-tightening frame 29; In the vertical transmission module, the vertical adjustment screw rod 35 rotatably installed on the welding frame 1 is connected to the pre-tightening frame 29. When the stroke of the vertical moving frame 3 needs to be adjusted, the vertical adjustment screw rod 35 is rotated. Since the screw rod and the pre-tightening frame 29 are in transmission cooperation, the pre-tightening frame 29 will move along the axial direction of the vertical adjustment screw rod 35. During the movement, the pre-tightening frame 29 will change the compression degree of the vertical spring 34, thereby adjusting the pre-tightening force on the vertical moving frame 3. At the same time, the first follower wheel 32 on the vertical moving frame 3 is in rolling contact with the first follower ring bag 31 on the first eccentric plate 30. The first eccentric plate 30 is driven to rotate by the top shaft 28, and the top shaft 28 is rotated by the The meshing of the first bevel gear on the main shaft 5 obtains power. After the vertical adjustment screw rod 35 drives the preload frame 29 to move, the contact position of the first follower ring capsule 31 and the first follower wheel 32 changes, so that the stroke of the vertical moving frame 3 during the up and down reciprocating motion changes accordingly. For example, when the vertical adjustment screw rod 35 causes the preload frame 29 to move upward, the compression amount of the vertical spring 34 increases, the preload force on the vertical moving frame 3 is enhanced, the relative position of the first follower ring capsule 31 and the first follower wheel 32 changes, and the upward and downward movement amplitude of the vertical moving frame 3 will increase or decrease according to the adjustment requirements, so as to meet the requirements of the vertical moving frame 3 stroke in different cutting conditions; The horizontal transmission module includes a pressure frame 36, a coupling shaft 37 and a bottom shaft 38 that are rotatably connected to the vertical moving frame 3. A horizontal adjustment screw rod 39 is rotatably installed on the vertical moving frame 3, and the horizontal adjustment screw rod 39 is slidably connected to the pressure frame 36. The coupling shaft 37, the bottom shaft 38 and the secondary shaft 7 are all driven by the main shaft 5. Two second eccentric plates 40 are installed on the bottom shaft 38, and each second eccentric plate 40 is installed on a second follower ring capsule 41. Second follower wheels 42 are rotatably installed on the translation frame 4 and corresponding to the positions of the two second follower ring capsules 41. The outer contours of the two second follower ring capsules 41 are in rolling contact with the two second follower wheels 42 respectively. Two flat guide rods 43 are installed on the translation frame 4. The two flat guide rods 43 are both slidably connected to the pressure frame 36. The two flat guide rods 43 are both sleeved with flat springs 44 that are limited by the pressure frame 36. In the horizontal transmission module, the horizontal adjustment screw rod 39 rotatably installed on the vertical moving frame 3 is slidably connected to the pressure frame 36. When adjusting the stroke of the translation frame 4, the horizontal adjustment screw rod 39 is rotated, and the pressure frame 36 will move along the axial direction of the screw rod under the action of the horizontal adjustment screw rod 39. The movement of the pressure frame 36 will change the compression state of the flat spring 44, thereby adjusting the pressure on the translation frame 4. The second follower wheel 42 on the translation frame 4 rolls with the second follower ring bag 41 of the second eccentric plate 40 on the bottom shaft 38. The bottom shaft 38 is driven to rotate by the main shaft 5. As the pressure frame 36 moves When the second follower ring bag 41 moves, the contact position between the second follower wheel 42 and the second follower ring bag 41 changes, and the stroke of the translation frame 4 during the left and right reciprocating motion changes accordingly. For example, if the horizontal adjustment screw rod 39 causes the pressure frame 36 to move to the left, the pressure of the flat spring 44 on the translation frame 4 increases, and the relative position of the second follower ring bag 41 and the second follower wheel 42 changes. The movement distance of the translation frame 4 to the left and right will be adjusted according to the actual cutting needs, ensuring that the cutting accuracy and coverage range of the laser cutting machine in the horizontal direction can flexibly adapt to the different cutting requirements of the low-pressure oxygen chamber body; A first square groove with an opening at the top and slidingly connected to the main shaft 5 is fixedly provided on the coupling 37. Second bevel teeth are installed on both the coupling 37 and the bottom shaft 38. The two second bevel teeth are engaged with each other. A square shaft 45 is rotatably installed on the vertical moving frame 3. A second square groove with an opening at the tail end and slidingly connected to the square shaft 45 is fixedly provided inside the secondary shaft 7. The cross-sections of the main shaft 5, the square shaft 45, the first square groove and the second square groove are all regular hexagons. A third bevel tooth is installed at the tail end of the square shaft 45, and the third bevel tooth is transmission-connected to the second bevel tooth on the bottom shaft 38. The cross-sections of the horizontal guide rod 43 and the vertical guide rod 33 are both T-shaped. The interiors of the first follower ring capsule 31 and the second follower ring capsule 41 are filled with gas. The first follower ring capsule 31 and the second follower ring capsule 41 are both made of wear-resistant rubber. The T-shaped horizontal guide rod 43 and the vertical guide rod 33 can effectively prevent the translation frame 4 and the vertical movement frame 3 from deflecting during movement. The first and second follower ring bags 31 and 41 made of wear-resistant rubber material filled with gas not only have good elasticity and can buffer the impact force during transmission, but also have wear-resistant properties, extending the service life of the components. This solves the problem of easy wear and short life of traditional transmission components. Compared with the existing technology, the stability and durability of the equipment are improved, the maintenance cost is reduced, and it is more suitable for long-term cutting of low-pressure oxygen chamber bodies. A fixed column 8 is fixedly mounted on the vertical moving frame 3. A rotating shell 10 driven by an indexing motor 9 is rotatably mounted on the fixed column 8. A visual probe 11, a fluorescence detection system 12, a fluorescent marking nozzle 13, and multiple laser nozzles 14 are respectively mounted on the rotating shell 10. The multiple laser nozzles 14 are of different types. The data terminals of the visual probe 11 and the fluorescence detection system 12 are both connected to the central control host 27; A laser welder 15 is fixedly installed on the fixed column 8 and corresponds to the position on the inner side of the rotating shell 10. A welding gun section 16 that cooperates with the laser nozzle 14 is fixedly provided on the laser welder 15. A fluorescent liquid supply assembly that supplies liquid to the fluorescent marking nozzle 13 is also installed on the fixed column 8. A water-cooled rotor 17 driven by the secondary shaft 7 is rotatably sleeved on the welding gun section 16, and a water-cooling assembly is provided in the water-cooled rotor 17.

[0021] The laser outlet of the welding gun section 16 is arranged directly below the rotation axis of the rotating shell 10, and the axes of the laser nozzle 14, the visual probe 11 and the fluorescent marking nozzle 13 are all perpendicular to the rotation axis of the rotating shell 10; In terms of improving cutting quality, the vertical vibration of the welding gun section 16 and the laser cutting head along the axis can optimize the interaction between the laser beam and the material, promote smoother discharge of the molten material during cutting, effectively reduce slag, make the cut surface smoother, and reduce the workload of subsequent processing. The vertical vibration can enable the laser beam to process the material more finely, achieve a narrower and more uniform cutting seam width, greatly improve cutting accuracy, and meet the processing needs of parts with high dimensional accuracy requirements. In terms of improving cutting efficiency, the up and down vibration dynamically changes the distance between the laser welding head and the material, enhancing the coupling of laser energy into the material and increasing the material's absorption rate of laser energy, thereby increasing the cutting speed and shortening the processing time to a certain extent. The "stirring" effect produced by the horizontal vibration can accelerate the discharge of molten material, prevent slag accumulation, maintain the stability of the cutting process, and improve cutting efficiency. In terms of reducing the heat-affected zone, vibration causes the laser action point to continuously move on the material surface, dispersing the heat evenly, avoiding localized excessive heat, and reducing the scope of the heat-affected zone. This is extremely critical for heat-sensitive materials and can reduce problems such as deformation and structural changes caused by heat. At the same time, due to the even heat dispersion, the internal thermal stress of the material is reduced, reducing the possibility of defects such as cracks when cutting parts, thereby improving product quality and reliability. In addition, this vibration mode can also improve processing adaptability. By adjusting vibration parameters such as amplitude and frequency, it can adapt to the cutting of materials of different types and thicknesses. It can also improve the cutting effect of difficult-to-cut materials, expand the application range of laser cutting, and in actual cutting, it can compensate to a certain extent for cutting errors caused by factors such as uneven material surface and uneven laser beam energy distribution, thereby improving cutting consistency and accuracy. The indexing motor 9 drives the rotating shell 10 to rotate, so that the visual probe 11, the fluorescent detection system 12, the fluorescent marking nozzle 13 and different types of laser nozzles 14 can switch working positions according to cutting requirements. The visual probe 11 and the fluorescent detection system 12 are connected to the central control host 27 for data, which can monitor the cutting status in real time. The welding gun section 16 of the laser welder 15 cooperates with the laser nozzle 14 to perform cutting and welding operations. This solves the problem that traditional equipment has a single function and cannot meet multiple cutting and detection requirements. The fluorescent liquid supply assembly includes a fluorescent liquid storage tank 18 mounted on the translation frame 4, a peristaltic pump is installed on the fluorescent liquid storage tank 18, a liquid separation ring cavity 47 is fixedly opened on the fixed column 8, the liquid outlet port of the peristaltic pump is connected to the liquid separation ring cavity 47 through a pump liquid tube, a driven rotating ring 46 is rotatably installed on the outer side of the liquid separation ring cavity 47, a liquid delivery tube connected to the liquid separation ring cavity 47 is installed on the driven rotating ring 46, and the other end of the liquid delivery tube is connected to the fluorescent marking nozzle 13.

[0022] The fluorescence detection system 12 includes an optical sensor for capturing the fluorescence signal emitted by the fluorescent marker, a filter configured to filter out interference from ambient light, and an image recognition algorithm for processing the captured image to identify the position and shape of the fluorescent marker; In the fluorescent liquid supply assembly, a peristaltic pump delivers the fluorescent liquid from the fluorescent liquid storage tank 18 to the liquid separation ring cavity 47 through the pump liquid pipe. The driven rotary ring 46 drives the liquid delivery pipe to deliver the fluorescent liquid to the fluorescent marking nozzle 13. Before the laser cutting machine is operated, the fluorescent liquid can be sprayed on the cutting path in advance. During laser cutting, the fluorescence detection system 12 periodically collects images and fluorescent images of the cutting area, thereby achieving real-time correction of cutting accuracy. The water-cooling assembly includes a water-cooling chamber opened between the water-cooling rotor 17 and the welding gun section 16, the water-cooling chamber is filled with water-cooling liquid, a fourth bevel gear is installed on the water-cooling rotor 17, a transmission bevel gear ring 48 is installed on the countershaft 7, the transmission bevel gear ring 48 is connected to the fourth bevel gear, a fan blade 20 is installed on the upper part of the water-cooling rotor 17, and a group of heat dissipation fins 19 distributed in a circular array are installed on the outer periphery of the water-cooling rotor 17 and at the position corresponding to the bottom of the fan blade 20.

[0023] In the water-cooling assembly, the secondary shaft 7 drives the fourth bevel gear through the transmission bevel gear ring 48, causing the water-cooling rotor 17 to rotate. The water-cooling liquid in the water-cooling chamber cools the welding torch segment 16. The fan blades 20 and the heat dissipation fins 19 enhance the heat dissipation effect. This solves the problem of the welding torch segment 16 being easily damaged by overheating during the laser cutting process. Compared with the existing technology, this effectively reduces the temperature of the welding torch segment 16, extends its service life, and ensures the stable operation of the laser cutting machine when cutting the low-pressure oxygen chamber body. The working principle and use process of the present invention: When the low-pressure oxygen chamber body laser cutting machine of the present invention is working, the multi-degree-of-freedom platform is first started, the linear transmission module 22 drives the transfer seat 23 to move linearly on the base frame 21, the first electric rotator drives the rotary plate 24 to rotate, and the three-section electric crank arm 25 cooperates to adjust the position and posture of the welding frame 1, so that the equipment can be accurately positioned to the cutting position of the low-pressure oxygen chamber body. Before cutting, the calibration plate 2 is magnetically fixed to the base frame 21 by the positioning magnetic block. The laser cutting machine cuts the test pattern in the detection area of ​​the calibration plate 2, and the central control host 27 cooperates with the visual probe 11 to collect the cutting width, cutting rate and cutting speed in real time. Power parameters, according to the various material properties simulated by the stainless steel layer, acrylic layer and ceramic coating, the cutting performance is detected and calibrated in advance. During the cutting process, the servo motor 6 drives the main shaft 5, and then drives the vertical transmission module and the horizontal transmission module to work. In the vertical transmission module, rotating the vertical adjustment screw 35 can change the position of the preload frame 29, adjust the compression degree of the vertical spring 34 and the contact position of the first follower ring capsule 31 and the first follower wheel 32, and realize the adjustment of the vertical moving frame 3 up and down. In the horizontal transmission module, rotating the horizontal adjustment screw 39 moves the pressure frame 36, changes the horizontal spring 4 4 pressure and the contact position of the second follower ring capsule 41 and the second follower wheel 42, adjusting the left and right reciprocating stroke of the translation frame 4, the vibration of the vertical frame 3 and the translation frame 4, optimize the interaction between the laser beam and the material, reduce slag, improve cutting accuracy and efficiency, reduce the heat-affected zone, and adapt to the cutting of different materials. The indexing motor 9 drives the rotating shell 10 to rotate, switching the working positions of the visual probe 11, the fluorescence detection system 12, the fluorescent marking nozzle 13 and different types of laser nozzles 14. The visual probe 11 and the fluorescence detection system 12 monitor the cutting situation in real time. The welding gun section 1 of the laser welder 15 6 cooperates with the laser nozzle 14 to perform cutting and welding. The peristaltic pump of the fluorescent liquid supply assembly transports the fluorescent liquid from the storage tank through the pump liquid pipe to the liquid separation ring cavity 47. The driven rotary ring 46 drives the liquid delivery pipe to deliver the fluorescent liquid to the fluorescent marking nozzle 13, and the fluorescent liquid is sprayed before cutting. During cutting, the fluorescence detection system 12 collects images and fluorescent images to correct the cutting accuracy. In the water-cooling assembly, the secondary shaft 7 drives the fourth bevel gear through the transmission bevel gear ring 48 to rotate the water-cooling rotor 17. The water-cooling liquid in the water-cooling chamber cools the welding gun segment 16. The fan blades 20 and the heat dissipation fins 19 enhance the heat dissipation effect to ensure the stable operation of the welding gun segment 16.

[0024] It should be noted that, in this document, relational terms such as first and second, etc., are used only to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any actual relationship or order between these entities or operations. Moreover, the terms "comprises," "comprising," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that includes a list of elements includes not only those elements but also other elements not explicitly listed, or elements inherent to such process, method, article, or apparatus.

[0025] While embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions, and variations may be made to these embodiments without departing from the principles and spirit of the invention, and that the scope of the invention is defined by the appended claims and their equivalents.

Claims

1. A laser cutting machine for a low-pressure oxygen chamber, comprising a multi-degree-of-freedom platform and a welding frame (1) connected to the multi-degree-of-freedom platform, characterized in that: The welding frame (1) further comprises a calibration plate (2), a vertical moving frame (3), a translation frame (4) and a main shaft (5) rotatably connected to the welding frame (1). A servo motor (6) is installed on the welding frame (1). The output shaft end of the servo motor (6) is connected to the main shaft (5) through a synchronous belt. A vertical transmission module for driving the vertical moving frame (3) to move up and down is installed on the welding frame (1). A horizontal transmission module for driving the translation frame (4) to move left and right is installed between the translation frame (4) and the vertical moving frame (3). The travel of the translation frame (4) and the vertical moving frame (3) is adjustable. A secondary shaft (7) driven by the main shaft (5) is rotatably installed on the translation frame (4). A fixed column (8) is fixedly installed on the vertical moving frame (3). A rotating sleeve is installed on the fixed column (8). A rotating shell (10) driven by an indexing motor (9) is provided, and a visual probe (11), a fluorescence detection system (12), a fluorescence marking nozzle (13) and a plurality of laser nozzles (14) are respectively installed on the rotating shell (10), and the types of the plurality of laser nozzles (14) are different. A laser welder (15) is fixedly installed on a fixed column (8) and at a position corresponding to the inner side of the rotating shell (10), and a welding gun section (16) matched with the laser nozzle (14) is fixedly provided on the laser welder (15). A fluorescent liquid supply component for supplying liquid to the fluorescent marking nozzle (13) is also installed on the fixed column (8). A water-cooling rotary drum (17) driven by a secondary shaft (7) is provided on the rotating sleeve of the welding gun section (16), and a water-cooling component is provided in the water-cooling rotary drum (17).

2. The laser cutting machine for a hypobaric oxygen chamber according to claim 1, characterized in that: The multi-degree-of-freedom platform includes a base frame (21), a linear transmission module (22) is installed on the base frame (21), a moving seat (23) is connected to the linear transmission module (22), a rotating plate (24) driven by a first electric rotator is installed on the moving seat (23), three electric crank arms (25) are installed on the rotating plate (24), and a turntable (26) driven by a second electric rotator is installed at the end of the three electric crank arms (25), the welding frame (1) is fixed on the turntable (26), a central control host (27) is installed on the base frame (21), and the data ends of the visual probe (11) and the fluorescence detection system (12) are both data-connected to the central control host (27).

3. The laser cutting machine for a hypobaric oxygen chamber according to claim 2, characterized in that: Two positioning magnetic blocks that are magnetically attracted to the calibration plate (2) are installed on the base frame (21), and the calibration plate (2) has a detection area with a predetermined cutting path, and the detection area includes at least one set of test patterns that can be laser cut, and the test patterns include a cross test pattern and a ring test pattern. The central control host (27) is used to collect the cutting width, cutting rate and cutting power parameters of the laser cutting machine when performing cutting in the detection area in real time. The calibration plate (2) includes a stainless steel layer, an acrylic layer and a ceramic coating arranged in sequence from the outside to the inside, and the thickness ratio of the stainless steel layer, the acrylic layer and the ceramic coating is 1:1.2:0.

8.

4. The laser cutting machine for a hypobaric oxygen chamber according to claim 1, characterized in that: The vertical transmission module includes a pre-tightening frame (29) and a top shaft (28) rotatably mounted on the welding frame (1), the top shaft (28) and the main shaft (5) are both mounted with first bevel gears, the two first bevel gears are meshed with each other, the top shaft (28) is mounted with a first eccentric plate (30), the first eccentric plate (30) is mounted with a first follower ring capsule (31), a first follower wheel (32) is rotatably mounted on the vertical moving frame (3), the outer contour of the first follower ring capsule (31) is in rolling contact with the first follower wheel (32), two vertical guide rods (33) are mounted on the vertical moving frame (3), the two vertical guide rods (33) are both slidably connected to the pre-tightening frame (29), vertical springs (34) are sleeved on the two vertical guide rods (33) and at positions corresponding to the top of the pre-tightening frame (29), a vertical adjustment screw rod (35) is rotatably mounted on the welding frame (1), and the vertical adjustment screw rod (35) is transmission-connected to the pre-tightening frame (29).

5. The laser cutting machine for a hypobaric oxygen chamber according to claim 4, characterized in that: The horizontal transmission module includes a pressure frame (36), a coupling (37) and a bottom shaft (38) rotatably connected to the vertical moving frame (3), a horizontal adjustment screw (39) rotatably installed on the vertical moving frame (3), and the horizontal adjustment screw (39) is slidably connected to the pressure frame (36). The coupling (37), the bottom shaft (38) and the secondary shaft (7) are all driven by the main shaft (5). Two second eccentric plates (40) are installed on the bottom shaft (38), and each of the second eccentric plates (40) is installed with a second A follower ring capsule (41), a second follower wheel (42) is rotatably mounted on the translation frame (4) and corresponding to the positions of the two second follower ring capsules (41), the outer contours of the two second follower ring capsules (41) are in rolling contact with the two second follower wheels (42), and two flat guide rods (43) are mounted on the translation frame (4), the two flat guide rods (43) are slidably connected to the pressure frame (36), and the two flat guide rods (43) are sleeved with a flat spring (44) that is limited by the pressure frame (36).

6. The laser cutting machine for a hypobaric oxygen chamber according to claim 5, characterized in that: The coupling shaft (37) is fixedly provided with a first square groove with a top opening and slidably connected to the main shaft (5), and the coupling shaft (37) and the bottom shaft (38) are both provided with second bevel gears, and the two second bevel gears are meshed with each other. A square shaft (45) is rotatably provided on the vertical moving frame (3), and a second square groove with a tail opening and slidably connected to the square shaft (45) is fixedly provided inside the secondary shaft (7). The cross sections of the main shaft (5), the square shaft (45), the first square groove and the second square groove are all regular hexagons. A third bevel gear is provided at the tail end of the square shaft (45), and the third bevel gear is transmission-connected to the second bevel gear on the bottom shaft (38).

7. The laser cutting machine for a hypobaric oxygen chamber according to claim 6, characterized in that: The cross sections of the horizontal guide rod (43) and the vertical guide rod (33) are both T-shaped, the interiors of the first follower ring capsule (31) and the second follower ring capsule (41) are both filled with gas, and the first follower ring capsule (31) and the second follower ring capsule (41) are both made of wear-resistant rubber.

8. The laser cutting machine for a hypobaric oxygen chamber according to claim 1, characterized in that: The fluorescent liquid supply assembly includes a fluorescent liquid storage tank (18) mounted on a translation frame (4), a peristaltic pump mounted on the fluorescent liquid storage tank (18), a liquid separation ring cavity (47) fixedly provided on the fixed column (8), a liquid outlet port of the peristaltic pump being connected to the liquid separation ring cavity (47) via a pump liquid pipe, a driven rotating ring (46) being rotatably mounted on the outer side of the liquid separation ring cavity (47), a liquid delivery pipe being connected to the liquid separation ring cavity (47) being mounted on the driven rotating ring (46), and the other end of the liquid delivery pipe being connected to the fluorescent marking nozzle (13).

9. The laser cutting machine for a hypobaric oxygen chamber according to claim 1, characterized in that: The water-cooling assembly includes a water-cooling chamber opened between the water-cooling rotor (17) and the welding gun section (16), the water-cooling chamber is filled with water-cooling liquid, a fourth bevel gear is installed on the water-cooling rotor (17), a transmission bevel gear ring (48) is installed on the secondary shaft (7), the transmission bevel gear ring (48) is connected to the fourth bevel gear in a transmission manner, a fan blade (20) is installed on the upper part of the water-cooling rotor (17), and a group of heat dissipation fins (19) distributed in a circumferential array are installed on the outer periphery of the water-cooling rotor (17) and at a position corresponding to the bottom of the fan blade (20).

10. The laser cutting machine for a hypobaric oxygen chamber according to claim 1, characterized in that: The laser outlet of the welding gun section (16) is arranged directly below the rotation axis of the rotating shell (10), and the axes of the laser nozzle (14), the visual probe (11) and the fluorescent marker nozzle (13) are all perpendicular to the rotation axis of the rotating shell (10). The fluorescence detection system (12) includes an optical sensor for capturing the fluorescent signal emitted by the fluorescent marker, a filter configured to filter out interference from ambient light, and an image recognition algorithm for processing the collected image to identify the position and shape of the fluorescent marker.

Images