Parallel flow aluminum flat tube special water guide laser cutting machine

Abstract

The application discloses a water guide laser cutting machine special for parallel flow aluminum flat tubes, which comprises a workbench, a first fixing support, a height adjusting assembly, a second fixing support, a moving assembly, a water guide laser mechanism, a conveying mechanism and a PLC control unit; the water guide laser mechanism is adopted to perform laser efficient ablation on the parallel flow aluminum flat tube, and the parallel flow aluminum flat tube is continuously and rapidly cooled and the waste is washed away at the same time, so that high-quality cross section flatness and surface quality are obtained, and the qualified rate of the cross section flatness and the qualified rate of the surface quality are 99.6% and 99.8% respectively; two parallel flow aluminum flat tube conveying belts are alternately cut to realize automatic and continuous cutting; meanwhile, the water guide laser cutting machine is suitable for cutting parallel flow aluminum flat tubes with various lengths to meet different requirements, and has high universality.

Description

Technical Field

[0001] This invention belongs to the field of parallel flow aluminum flat tube technology, specifically relating to a water-guided laser cutting machine for parallel flow aluminum flat tubes. Background Technology

[0002] Parallel flow aluminum flat tubes, also known as microchannel aluminum flat tubes or harmonica tubes, are thin-walled, porous, flat tubular materials made from refined aluminum rods through hot extrusion and surface zinc spraying for corrosion protection. Their interiors consist of multiple microchannels, typically less than 0.5 mm wide, and they come in various cross-sectional shapes such as rectangles, triangles, and circles. The wall thickness is generally less than 0.2 mm. They are mainly used in refrigeration systems such as automotive air conditioning, residential air conditioning, and refrigerators. Produced parallel flow aluminum flat tubes need to be cut to specified lengths according to customer requirements.

[0003] For example, Chinese patent CN121423693A, published on January 30, 2026, discloses a microchannel aluminum flat tube aluminum alloy cutting process. During the continuous conveying of the microchannel aluminum flat tube, the conveyor belt is pressed by a hydraulic push rod and two sets of paired contact pressure rods. Combined with the following slider and slide rod, the cutting component and the aluminum flat tube move synchronously, avoiding machine stoppage for cutting. The side-moving slider drives the contact pressure rods to move closer to each other. The lifting inclined plane slightly lifts the part to be cut away from the conveyor belt, and the connecting rod and the top pressure block work together to press down to keep it horizontal and ensure stable clamping. At the end of the cutting, the triggering inclined block and the lower pressure block work together to drive the separation side plate to apply a continuously increasing pull force, turning shearing into tensile fracture, effectively reducing vertical collapse and tube inward turning, and significantly improving cutting efficiency, accuracy and product performance.

[0004] As can be seen from the above patents, although this patent transforms shearing into tensile fracture at the end of the aluminum flat tube cutting process, effectively reducing vertical collapse and tube end inversion, it has the following shortcomings: 1. During tensile fracture, microcracks are easily generated at the fracture surface, which affects the mechanical properties of aluminum flat tubes and thus their applications. 2. During the tensile fracture process, defects such as wire drawing or micropores are easily generated at the fracture surface, which affects the flatness of the aluminum flat tube cross-section. 3. During the tensile fracture process, debris, burrs, or flash are easily generated, which affects the surface quality of the aluminum flat tube cross-section. Therefore, there is an urgent need for a water-guided laser cutting machine specifically designed for parallel flow aluminum flat tubes, which can reduce defects such as microcracks, wire drawing or micropores, debris or burrs or flash generated during the cutting process of parallel flow aluminum flat tubes, improve the flatness and surface quality of the cross-section of parallel flow aluminum flat tubes, and realize automated and continuous production. Summary of the Invention

[0005] The purpose of this invention is to provide a water-guided laser cutting machine for parallel flow aluminum flat tubes, which is suitable for the continuous production of parallel flow aluminum flat tubes. It performs laser micro-jet cutting on parallel flow aluminum flat tubes, and utilizes the advantages of water jet to accurately conduct laser energy, continuously cool and suppress heat accumulation and heat-affected zone, and wash away the molten material waste removed by the laser, thereby obtaining high-quality cross-sectional flatness and surface quality.

[0006] The technical solution of the present invention is as follows: A water-guided laser cutting machine for parallel flow aluminum flat tubes includes a worktable. The first fixed bracket is used for fixing, supporting and installing, and is fixedly connected to one end of the workbench in an inverted L shape; A height adjustment component, wherein the height adjustment component is used to adjust the height, and the height adjustment component is disposed on the upper part of the first fixed bracket; The second fixed bracket is used for fixing, supporting and installing, and is fixedly connected to the height adjustment assembly; A movable component, the movable component being used for longitudinal movement, the movable component being disposed in the second fixed bracket; A water-guided laser mechanism is used for cutting parallel-flow aluminum flat tubes, and the water-guided laser mechanism is fixedly connected to the moving component. The water-guided laser mechanism includes a laser, a focusing lens, a high-pressure water assembly, a laser-water jet coupling module, a first sensor, and a controller. The laser provides a stable standard laser source, the focusing lens focuses the standard laser source, the high-pressure water assembly provides high-pressure ultrapure water, and the laser-water jet coupling module couples the focused standard laser source with the high-pressure purified water in a high-precision, efficient, and stable manner to form a laser microjet. The first sensor detects the presence of a parallel-flow aluminum flat tube on the worktable. The controller is electrically connected to and controls the laser, the high-pressure water assembly, and the laser-water jet coupling module, and is also electrically connected to the first sensor.

[0007] Optionally, a conveying mechanism is embedded in the middle of the workbench. The conveying mechanism is arranged along the conveying direction of the parallel flow aluminum flat tube. The conveying mechanism includes a first conveyor belt, a second conveyor belt, a third conveyor belt, and a fourth conveyor belt. The first and second conveyor belts are used to convey the first parallel flow aluminum flat tube, and the third and fourth conveyor belts are used to convey the second parallel flow aluminum flat tube.

[0008] Optionally, a lifting first baffle and a second baffle are movably installed on the worktable at the front ends of the second conveyor belt and the fourth conveyor belt, respectively. A second sensor and a third sensor are respectively installed on the first baffle and the second baffle. The second sensor and the third sensor are used to detect whether there are parallel flow aluminum flat tubes on the second conveyor belt and the fourth conveyor belt, respectively.

[0009] Optionally, several sets of fixing grooves are respectively arranged on the worktable above the first conveyor belt, the second conveyor belt, the third conveyor belt and the fourth conveyor belt along the parallel flow aluminum flat tube conveying direction. Each set of fixing grooves is used to guide and fix the parallel flow aluminum flat tube conveying direction. A cutting slit is fixedly arranged at the center of the worktable.

[0010] Optionally, a control unit is fixedly installed on the workbench, and the control unit is electrically connected to the first conveyor belt, the second conveyor belt, the third conveyor belt, the fourth conveyor belt, the first baffle, the second baffle, the second sensor, and the third sensor, respectively.

[0011] Optionally, a PLC control unit is fixedly installed on the first fixed bracket. The PLC control unit is electrically connected to the height adjustment component, the moving component, the controller, and the control unit. A collection box is provided below the cutting slit to collect waste and water generated during the cutting process. A splash guard is fixedly installed on the worktable to prevent water and waste from splashing.

[0012] Optionally, the height adjustment component and the moving component have the same structure. The height adjustment component includes a first drive motor, a first slide rail, and a first lead screw slide. The first drive motor is fixedly installed in the first fixed bracket, and the output end of the first drive motor is connected to the first lead screw slide and drives the first lead screw slide to slide up and down in the first slide rail to achieve height adjustment.

[0013] The beneficial effects of this invention are: The water-guided laser cutting machine for parallel-flow aluminum flat tubes disclosed in this application has the following beneficial effects: 1. Water-guided laser processing technology is used to replace existing tensile fracture, abrasive wheel cutting, or laser cutting technologies. This technology fully utilizes the "water column fiber" formed by confining the laser within a water jet, similar to an optical fiber. This allows the laser energy to be guided long-distance, low-loss to the surface of the parallel-flow aluminum flat tube. While achieving efficient laser ablation, continuous and rapid cooling and waste removal are achieved, resulting in high-quality cross-sectional flatness and surface quality. Tests show that the flatness and surface quality qualification rates of the aluminum flat tube cross-section after cutting with the water-guided laser cutting machine are 99.6% and 99.8%, respectively. The flatness and surface quality of the aluminum flat tube cross-section are significantly improved after cutting with the water-guided laser cutting machine. 2. Two parallel flow aluminum flat tube conveyor belts are used to automatically transport parallel flow aluminum flat tubes, which are then alternately cut by a water-guided laser mechanism to achieve automated and continuous cutting of parallel flow aluminum flat tubes. 3. An adjustable baffle is used to accommodate the cutting of parallel flow aluminum flat tubes of various lengths, meeting different customer needs; This application employs a water-guided laser mechanism to perform efficient laser ablation on parallel flow aluminum flat tubes while continuously and rapidly cooling and flushing away waste materials, achieving high-quality cross-sectional flatness and surface quality; the pass rates for cross-sectional flatness and surface quality are 99.6% and 99.8%, respectively; automated and continuous cutting is achieved by alternating cutting of two parallel flow aluminum flat tube conveyor belts; it is also adaptable to cutting parallel flow aluminum flat tubes of various lengths to meet different needs, demonstrating strong versatility. Attached Figure Description

[0014] To more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings in the following description are merely exemplary, and those skilled in the art can derive other embodiments based on the provided drawings without creative effort.

[0015] The structures, proportions, sizes, etc. illustrated in this specification are only for the purpose of assisting those skilled in the art in understanding and reading the content disclosed herein, and are not intended to limit the conditions under which the present invention can be implemented. Therefore, they have no substantial technical significance. Any modifications to the structure, changes in the proportions, or adjustments to the size, without affecting the effects and objectives that the present invention can produce, should still fall within the scope of the technical content disclosed in the present invention.

[0016] Figure 1 This is a side view of the structure of the present invention; Figure 2 This is a partial front view schematic diagram of the structure of the present invention; Figure 3 This is a top view of the conveying mechanism of the present invention; The figure shows: 1. Workbench; 2. First fixed bracket; 3. Height adjustment component; 31. First drive motor; 32. First slide rail; 33. First lead screw slide; 4. Second fixed bracket; 5. Moving component; 51. Second drive motor; 52. Second slide rail; 53. Second lead screw slide; 6. Water-guided laser mechanism; 61. Laser; 62. Focusing lens; 63. High-pressure water component; 64. Laser-water jet coupling module; 65. First sensor; 66. Controller; 7. Conveying mechanism; 71. First conveyor belt; 72. Second conveyor belt; 73. Third conveyor belt; 74. Fourth conveyor belt; 75. First baffle; 76. Second baffle; 77. Second sensor; 78. Third sensor; 79. Fixed groove; 710. Cutting slit; 711. Control unit; 8. PLC control unit; 9. Collection box; 10. Splash shield. Detailed Implementation

[0017] The present invention will be further described below with reference to the embodiments, but the scope of protection of the present invention is not limited to the following embodiments.

[0018] Example 1 A water-guided laser cutting machine for parallel flow aluminum flat tubes includes a worktable 1, a first fixed support 2, a height adjustment component 3, a second fixed support 4, a moving component 5, a water-guided laser mechanism 6, a conveying mechanism 7, a PLC control unit 8, a collection box 9, and a splash guard 10.

[0019] like Figures 1-2 As shown, the workbench 1 is used for placing and conveying parallel flow aluminum flat tubes; the first fixed bracket 2, which is used to fix, support and install the height adjustment component 3, is fixedly connected to one end of the workbench 1 in an inverted L shape, and the first fixed bracket 2 is located at the rear end of the workbench 1 when viewed from the front; the height adjustment component 3, which is used to adjust the height, is set on the upper part of the first fixed bracket 2; the height adjustment component 3 includes a first drive motor 31, a first slide rail 32 and a first lead screw slide 33, the first drive motor 31, which provides driving force, is fixedly installed in the first fixed bracket 2, and the output end of the first drive motor 31 is connected to the first lead screw slide 33, and drives the first lead screw slide 33 to slide up and down in the first slide rail 32, thereby realizing the adjustment of the height of the first lead screw slide 33.

[0020] The second fixed bracket 4, used for fixing, supporting, and installing the movable component 5, is fixedly connected to the first lead screw slide 33 of the height adjustment component 3, thereby realizing the height adjustment of the second fixed bracket 4; the movable component 5, used for longitudinal movement (note: viewed from the front, it moves back and forth), is disposed in the second fixed bracket 4; the structure of the movable component 5 is the same as that of the height adjustment component 3, and the movable component 5 includes a second drive motor 51, a second slide rail 52, and a second lead screw slide 53. The second drive motor 51, used to provide driving force, is fixedly installed in the second fixed bracket 4, and the output end of the second drive motor 51 is connected to the second lead screw slide 53, and drives the second lead screw slide 53 to move longitudinally back and forth in the second slide rail 52.

[0021] The water-guided laser mechanism 6 for cutting parallel-flow aluminum flat tubes is fixedly connected to the second lead screw slide 53 of the moving component 5, thereby realizing the longitudinal movement of the water-guided laser mechanism 6. The water-guided laser mechanism 6 includes a laser 61, a focusing lens 62, a high-pressure water component 63, a laser-water jet coupling module 64, a first sensor 65, and a controller 66. The laser 61 is used to provide a stable standard laser source. In this embodiment, the laser 61 is a diode-pumped solid-state pulsed Nd:YAG laser with a pulse duration in the range of μs or ns, a working wavelength of 532 nm (green light), and an average laser power range of 20~400 nm. W; Focusing lens 62 is used to focus the standard laser source to form a small laser spot, which in this embodiment is less than 100 μm; High-pressure water assembly 63 is used to provide high-pressure ultrapure water. In this embodiment, the high-pressure water assembly 63 is connected to a separate pure deionized filtered water supply system through a booster pump and pipeline; Laser-water jet coupling module 64 is used to couple the focused standard laser source with high-pressure ultrapure water with high precision, high efficiency and stable performance to form a laser microjet. In this embodiment, the laser-water jet coupling module 64 contains a precision nozzle to achieve high-precision, high-efficiency and stable coupling between the focused laser beam and the water jet, forming a stable laser microjet with a diameter of 25-150 μm. μm, to achieve precision machining with narrow cutting kerf and no surface ablation; the first sensor 65, fixedly set on the outer circumference of the bottom of the laser-water jet coupling module 64, is used to detect whether there is a parallel flow aluminum flat tube on the worktable 1. In this embodiment, the first sensor 65 is a distance sensor; the controller 66, fixedly set on the outer wall of the water guide laser mechanism 6, is electrically connected to and controls the laser 61, the high-pressure water component 63 and the laser-water jet coupling module 64 respectively, and is electrically connected to the first sensor 65.

[0022] It should be noted that when the water-guided laser mechanism 6 moves longitudinally from back to front, when the first sensor 65 at the front end of the water-guided laser mechanism 6 detects the presence of a parallel-flow aluminum flat tube on the worktable 1, it transmits a signal to the controller 66. The controller 66 controls the laser 61, the high-pressure water assembly 63, and the laser-water jet coupling module 64 to form a laser micro-jet to cut the parallel-flow aluminum flat tube. After cutting, the first sensor 65 detects that there is no parallel-flow aluminum flat tube on the worktable 1 and transmits a signal to the controller 66. The controller 66 controls the laser 61, the high-pressure water assembly 63, and the laser-water jet coupling module 64 to shut down and stop cutting.

[0023] like Figure 3 As shown, a conveying mechanism 7 is embedded in the middle of the workbench 1. The conveying mechanism 7 is arranged along the conveying direction of the parallel flow aluminum flat tubes. The conveying mechanism 7 includes a first conveyor belt 71, a second conveyor belt 72, a third conveyor belt 73, and a fourth conveyor belt 74. The first conveyor belt 71 and the second conveyor belt 72 are used to convey the first parallel flow aluminum flat tubes, forming the first parallel flow aluminum flat tube conveying belt; the third conveyor belt 73 and the fourth conveyor belt 74 are used to convey the second parallel flow aluminum flat tubes, forming the second parallel flow aluminum flat tube conveying belt. When the water-guided laser mechanism 6 moves longitudinally from back to front, it can sequentially cut the first parallel flow aluminum flat tube on the first parallel flow aluminum flat tube conveying belt and the second parallel flow aluminum flat tube on the second parallel flow aluminum flat tube conveying belt, respectively. Then it resets from front to back and cuts again sequentially to form alternating cutting, thereby realizing the automated and continuous cutting of the parallel flow aluminum flat tubes.

[0024] Among them, a lifting first baffle 75 and a second baffle 76 are movably installed on the workbench 1 at the front end of the second conveyor belt 72 and the fourth conveyor belt 74, respectively. The first baffle 75 and the second baffle 76, after rising, are used to block the first parallel flow aluminum flat tube and the second parallel flow aluminum flat tube, respectively; while the first baffle 75 and the second baffle 76, after falling, are used to allow the first parallel flow aluminum flat tube and the second parallel flow aluminum flat tube to pass through, respectively; a second sensor 77 and a third sensor 78 are installed on the first baffle 75 and the second baffle 76, respectively. The second sensor 77 and the third sensor 78 are used to detect whether there are parallel flow aluminum flat tubes on the second conveyor belt 72 and the fourth conveyor belt 74, respectively.

[0025] The workbench 1 is fixedly equipped with a control unit 711, which is electrically connected to the first conveyor belt 71, the second conveyor belt 72, the third conveyor belt 73, the fourth conveyor belt 74, the first baffle 75, the second baffle 76, the second sensor 77, and the third sensor 78.

[0026] It should be noted that when the second sensor 77 and the third sensor 78 detect the presence of parallel-flow aluminum flat tubes on the second conveyor belt 72 and the fourth conveyor belt 74, respectively, they transmit signals to the control unit 711. The control unit 711 controls the first baffle 75 and the second baffle 76 to rise, respectively, blocking the first and second parallel-flow aluminum flat tubes. Subsequently, the water-guided laser mechanism 6 cuts the first and second parallel-flow aluminum flat tubes. After cutting, the control unit 711 controls the first baffle 75 and the second baffle 76 to descend, and the cut first and second parallel-flow aluminum flat tubes pass through the first baffle 75 and the second baffle 76, respectively, and are collected. After the cut first and second parallel-flow aluminum flat tubes pass through the first baffle 75 and the second baffle 76, respectively, the second sensor 77 and the third sensor 78 detect that there are no parallel-flow aluminum flat tubes on the second conveyor belt 72 and the fourth conveyor belt 74, which completes one cycle.

[0027] Among them, several sets of fixing slots 79 are respectively set on the workbench 1 above the first conveyor belt 71, the second conveyor belt 72, the third conveyor belt 73 and the fourth conveyor belt 74 along the parallel flow aluminum flat tube conveying direction (note: from the front view, it moves from left to right). Each set of fixing slots 79 is used to guide and fix the parallel flow aluminum flat tube conveying direction. That is, on the one hand, it guides the parallel flow aluminum flat tube to be conveyed from left to right along the conveying direction. On the other hand, the combination of each set of fixing slots 79 fixes the parallel flow aluminum flat tube close to the working plane of the workbench 1 so that when the water guide laser mechanism 6 cuts the parallel flow aluminum flat tube, the parallel flow aluminum flat tube will not be deflected or warped, so as to ensure high-quality cross-sectional flatness and surface quality.

[0028] In addition, a cutting slit 710 is fixedly set at the center of the workbench 1, and a collection box 9 is set below the cutting slit 710. The parallel flow aluminum flat tube is cut at the cutting slit 710. The waste generated during the cutting process is washed away by the laser micro jet to the bottom of the cutting slit 710 and collected by the collection box 9. A splash guard 10 is fixedly set on the workbench 1 to prevent water and waste from splashing.

[0029] In addition, a control unit 711 is fixedly installed on the workbench 1. The control unit 711 is electrically connected to the first conveyor belt 71, the second conveyor belt 72, the third conveyor belt 73, the fourth conveyor belt 74, the first baffle 75, the second baffle 76, the second sensor 77, and the third sensor 78, respectively. The control unit 711 controls the first conveyor belt 71, the second conveyor belt 72, the third conveyor belt 73, the fourth conveyor belt 74, the first baffle 75, and the second baffle 76, respectively.

[0030] In addition, a PLC control unit 8 is fixedly installed on the first fixed bracket 2. The PLC control unit 8 is electrically connected to the height adjustment component 3, the moving component 5, the controller 66 and the control unit 711.

[0031] Example 2 Based on Example 1, this embodiment describes in detail the working process of a dedicated water-guided laser cutting machine for parallel flow aluminum flat tubes, using the cutting process of two types of tubes with lengths of 154.5 mm and 158.5 mm after cutting as examples.

[0032] S1 Setting the cutting length: After measuring the distances between the first baffle 75 and the second baffle 76 and the cutting seam 710 to 154.5 mm and 158.5 mm respectively, the first baffle 75 and the second baffle 76 are fixedly installed on the worktable 1 along the parallel flow aluminum flat tube conveying direction, but without affecting the lifting and lowering of the first baffle 75 and the second baffle 76. S2 Adjusting the water-guided laser mechanism 6: The PLC control unit 8 activates the height adjustment component 3 and the moving component 5 respectively, and adjusts the height and longitudinal direction of the water-guided laser mechanism 6 to a suitable starting position; S3 conveying parallel flow aluminum flat tubes: PLC control unit 8 activates control unit 711, which in turn activates the first conveyor belt 71 and the third conveyor belt 73 to convey the first and second parallel flow aluminum flat tubes from left to right and through the cutting seam 710. Control unit 711 then activates the second conveyor belt 72 and the fourth conveyor belt 74 to continue conveying the first and second parallel flow aluminum flat tubes from left to right. When the second sensor 77 and the third sensor 78 detect the presence of parallel flow aluminum flat tubes on the second conveyor belt 72 and the fourth conveyor belt 74, respectively, they transmit signals to control unit 711. Control unit 711 then controls the first baffle 75 and the second baffle 76 to rise, blocking the first and second parallel flow aluminum flat tubes. Simultaneously, control unit 711 shuts down the first conveyor belt 71, the second conveyor belt 72, the third conveyor belt 73, and the fourth conveyor belt 74. The S4 water-guided laser mechanism 6 cuts the first parallel-flow aluminum flat tube: The PLC control unit 8 activates the moving component 5 and the controller 66. The moving component 5 drives the water-guided laser mechanism 6 to move longitudinally from back to front. When the laser-water jet coupling module 64 approaches the first parallel-flow aluminum flat tube, the first sensor 65 detects the presence of the parallel-flow aluminum flat tube on the worktable 1 and transmits a signal to the controller 66. The controller 66 controls the laser 61, the high-pressure water component 63, and the laser-water jet coupling module 64 to form a laser micro-jet to cut the first parallel-flow aluminum flat tube at the cutting slit 710 longitudinally from back to front. The waste generated during the cutting process is washed away by the laser micro-jet to the bottom of the cutting slit 710 and collected by the collection box 9. After cutting the first parallel-flow aluminum flat tube, the first sensor 65 detects that there is no parallel-flow aluminum flat tube on the worktable 1 and transmits a signal to the controller 66. The controller 66 controls the laser 61, the high-pressure water component 63, and the laser-water jet coupling module 64 to shut down and stop cutting. At the same time, the control unit 711 controls the first baffle 75 to descend and opens the second conveyor belt 72 to transport the cut 154.5 The first parallel flow aluminum flat tube conveys and collects the material from left to right; The S5 water-guided laser mechanism 6 cuts the second parallel-flow aluminum flat tube: When the laser-water jet coupling module 64 approaches the second parallel-flow aluminum flat tube, the first sensor 65 detects the presence of the parallel-flow aluminum flat tube on the worktable 1 and transmits a signal to the controller 66. The controller 66 controls the laser 61, the high-pressure water assembly 63, and the laser-water jet coupling module 64 to form a laser micro-jet to cut the second parallel-flow aluminum flat tube at the cutting slit 710 longitudinally from back to front. The waste generated during the cutting process is washed away by the laser micro-jet to the bottom of the cutting slit 710 and collected by the collection box 9. After the second parallel-flow aluminum flat tube is cut, the first sensor 65 detects that the parallel-flow aluminum flat tube is no longer present on the worktable 1 and transmits a signal to the controller 66. The controller 66 controls the laser 61, the high-pressure water assembly 63, and the laser-water jet coupling module 64 to shut down and stop the cutting. The control unit 711 controls the second baffle 76 to descend and opens the fourth conveyor belt 74 to transport the cut 158.5 mm aluminum flat tube. The second parallel flow aluminum flat tube is transported and collected from left to right; at the same time, the PLC control unit 8 activates the moving component 5 to drive the water guide laser mechanism 6 to move longitudinally from front to back and reset to the starting position in step S2. S6 conveys the first parallel-flow aluminum flat tube: Simultaneously with step S5, the 154.5 mm first parallel-flow aluminum flat tube passes through the first baffle 75. The second sensor 77 detects that there is no parallel-flow aluminum flat tube on the second conveyor belt 72, completing the conveying, cutting, and collection of the first parallel-flow aluminum flat tube, which is one cycle. The control unit 711 turns on the first conveyor belt 71 and the second conveyor belt 72 respectively, continuing to convey the first parallel-flow aluminum flat tube from left to right. When the second sensor 77 detects that there is a parallel-flow aluminum flat tube on the second conveyor belt 72, it transmits a signal to the control unit 711. The control unit 711 controls the first baffle 75 to rise, blocking the first parallel-flow aluminum flat tube. At the same time, the control unit 711 turns off the first conveyor belt 71 and the second conveyor belt 72 respectively. S7 Water-guided Laser Mechanism 6 Cuts the First Parallel Flow Aluminum Flat Tube: Repeat step S4. S8 conveys the second parallel flow aluminum flat tube: Simultaneously with step S7, the 158.5 mm second parallel flow aluminum flat tube passes through the second baffle 76. The third sensor 78 detects that there is no parallel flow aluminum flat tube on the fourth conveyor belt 74, completing the conveying, cutting, and collection of the second parallel flow aluminum flat tube, which is one cycle. The control unit 711 turns on the third conveyor belt 73 and the fourth conveyor belt 74 respectively to continue conveying the second parallel flow aluminum flat tube from left to right. When the third sensor 78 detects that there is a parallel flow aluminum flat tube on the fourth conveyor belt 74, it transmits a signal to the control unit 711. The control unit 711 controls the second baffle 76 to rise, blocking the second parallel flow aluminum flat tube. At the same time, the control unit 711 turns off the third conveyor belt 73 and the fourth conveyor belt 74 respectively. Thus, steps S5, S6, S7, and S8 are repeated, with 154.5 mm first parallel flow aluminum flat tubes and 158.5 mm second parallel flow aluminum flat tubes being cut alternately, achieving automated and continuous cutting of parallel flow aluminum flat tubes of different lengths.

[0033] Example 3 In this embodiment, aluminum flat tubes cut by the cutting process of the prior art CN121423693A and aluminum flat tubes cut by the water-guided laser cutting machine of this application were randomly selected in 5 batches to obtain comparative aluminum flat tube samples and embodiment aluminum flat tube samples, 100 pieces in each batch, and the flatness and surface quality of the cross section were tested. The smoothness of the cross-section can be measured by the roughness Ra. Ra ≤ 3.2 μm is considered qualified, otherwise it is considered unqualified. The surface quality of the cross section is inspected visually. The surface is considered qualified if there are no microcracks, micropores, slag, micro-melting nodules, burrs and flash. If any of the following are present, the surface is considered unqualified. The test results of the comparative aluminum flat tube sample and the example aluminum flat tube sample are shown in Table 1.

[0034] Table 1. Cross-sectional pass rate of aluminum flat tubes in comparative examples and embodiments.

[0035] As shown in Table 1, the flatness and surface quality pass rates of the aluminum flat tube cross-section in the comparative example were 97.2% and 96.8%, respectively; while the flatness and surface quality pass rates of the aluminum flat tube cross-section in the example were 99.6% and 99.8%, respectively. This indicates that the flatness and surface quality pass rates of the aluminum flat tube cross-section improved by 2.4% and 2% respectively after cutting with the water-guided laser cutting machine, and the flatness and surface quality of the aluminum flat tube cross-section were significantly improved after cutting with the water-guided laser cutting machine.

[0036] Finally, it should be noted that the above descriptions are merely preferred embodiments of the present invention and are not intended to limit the present invention. Although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the protection scope of the present invention.

Claims

1. A water-guided laser cutting machine for parallel flow aluminum flat tubes, comprising a worktable (1), The first fixed bracket (2) is used for fixing, supporting and installing, and is fixedly connected to one end of the workbench (1) in an inverted L shape; A height adjustment component (3) is used to adjust the height, and the height adjustment component (3) is disposed on the upper part of the first fixed bracket (2); The second fixed bracket (4) is used for fixing, supporting and installing, and is fixedly connected to the height adjustment assembly (3); A movable component (5) for longitudinal movement, the movable component (5) being disposed in the second fixed bracket (4); Its features are: Water-guided laser mechanism (6), which is used for cutting parallel flow aluminum flat tubes, is fixedly connected to the moving component (5); The water-guided laser mechanism (6) includes a laser (61), a focusing lens (62), a high-pressure water assembly (63), a laser-water jet coupling module (64), a first sensor (65), and a controller (66). The laser (61) is used to provide a stable standard laser source. The focusing lens (62) is used to focus the standard laser source. The high-pressure water assembly (63) is used to provide high-pressure ultrapure water. The laser-water jet coupling module (64) is used to couple the focused standard laser source with the high-pressure purified water with high precision, high efficiency, and stability to form a laser microjet. The first sensor (65) is used to detect whether there is a parallel flow aluminum flat tube on the worktable (1). The controller (66) is electrically connected to and controls the laser (61), the high-pressure water assembly (63), and the laser-water jet coupling module (64), and is also electrically connected to the first sensor (65).

2. The water-guided laser cutting machine for parallel flow aluminum flat tubes according to claim 1, characterized in that: The workbench (1) has a conveying mechanism (7) embedded in the middle. The conveying mechanism (7) is arranged along the conveying direction of the parallel flow aluminum flat tube. The conveying mechanism (7) includes a first conveyor belt (71), a second conveyor belt (72), a third conveyor belt (73), and a fourth conveyor belt (74). The first conveyor belt (71) and the second conveyor belt (72) are used to convey the first parallel flow aluminum flat tube, and the third conveyor belt (73) and the fourth conveyor belt (74) are used to convey the second parallel flow aluminum flat tube.

3. The water-guided laser cutting machine for parallel flow aluminum flat tubes according to claim 2, characterized in that: On the workbench (1), a lifting first baffle (75) and a second baffle (76) are movably installed at the front ends of the second conveyor belt (72) and the fourth conveyor belt (74), respectively. A second sensor (77) and a third sensor (78) are installed on the first baffle (75) and the second baffle (76), respectively. The second sensor (77) and the third sensor (78) are used to detect whether there are parallel flow aluminum flat tubes on the second conveyor belt (72) and the fourth conveyor belt (74), respectively.

4. The water-guided laser cutting machine for parallel flow aluminum flat tubes according to claim 2, characterized in that: On the workbench (1), several sets of fixing grooves (79) are respectively arranged above the first conveyor belt (71), the second conveyor belt (72), the third conveyor belt (73) and the fourth conveyor belt (74) along the parallel flow aluminum flat tube conveying direction. Each set of fixing grooves (79) is used to guide and fix the parallel flow aluminum flat tube conveying direction. A cutting slit (710) is fixedly arranged in the center of the workbench (1).

5. The water-guided laser cutting machine for parallel flow aluminum flat tubes according to claim 3, characterized in that: A control unit (711) is fixedly installed on the workbench (1). The control unit (711) is electrically connected to the first conveyor belt (71), the second conveyor belt (72), the third conveyor belt (73), the fourth conveyor belt (74), the first baffle (75), the second baffle (76), the second sensor (77), and the third sensor (78).

6. The water-guided laser cutting machine for parallel flow aluminum flat tubes according to claim 5, characterized in that: A PLC control unit (8) is fixedly installed on the first fixed bracket (2). The PLC control unit (8) is electrically connected to the height adjustment component (3), the moving component (5), the controller (66), and the control unit (711). A collection box (9) is set below the cutting seam (710). The collection box (9) is used to collect waste and water generated during the cutting process. A splash guard (10) is fixedly installed on the workbench (1) to prevent water and waste from splashing.

7. The water-guided laser cutting machine for parallel flow aluminum flat tubes according to claim 1, characterized in that: The height adjustment component (3) and the moving component (5) have the same structure. The height adjustment component (3) includes a first drive motor (31), a first slide rail (32) and a first lead screw slide (33). The first drive motor (31) is fixedly installed in the first fixed bracket (2) and the output end of the first drive motor (31) is connected to the first lead screw slide (33) and drives the first lead screw slide (33) to slide up and down in the first slide rail (32) to achieve height adjustment.

Images