Laser cutting device and method for fin processing for heat exchanger production

Abstract

This invention discloses a laser cutting apparatus and method for fin processing in heat exchanger production, relating to the field of laser cutting technology. Through the alternating lifting design of the first and second support components, an effective support point is always present during the cutting process. When one set of support teeth heats up due to laser irradiation, the other set can immediately switch to working mode, while the original support component is rapidly cooled by immersing it in water containing rust inhibitor, ensuring that the impact of laser energy on itself is reduced during the next support action. This design avoids metal fatigue or deformation caused by prolonged exposure of a single support point to high temperatures from residual laser energy, extending the service life of the first and second support components. Furthermore, the detachable protective sleeves on the support teeth can be easily removed and replaced after damage, thus avoiding the need to replace the entire support component due to damage to the support teeth, saving replacement costs.

Description

Technical Field

[0001] This invention relates to the field of laser cutting technology, specifically to a laser cutting apparatus and method for processing fins in heat exchanger production. Background Technology

[0002] Laser cutting uses a high-power-density laser beam to scan the surface of a material, heating it to a molten or vaporized state in a very short time. The molten or vaporized material is then blown away from the cut by high-pressure gas, thus achieving the cutting purpose.

[0003] The laser cutting device disclosed in patent application CN201410604Y utilizes a servo motor-driven motion platform with dual lead screw transmission and nut rotation technology, resulting in smoother and more reliable movement. A fully sealed optical path design ensures user safety during operation. The lens mounting uses a segmented placement method, which helps protect the focusing lens and facilitates lens replacement. The focus adjustment employs a gear and rack structure for sensitive and accurate adjustment. A pneumatic rotary auxiliary feeding mechanism simplifies the loading and unloading of large plates.

[0004] The laser cutting devices described above have the following drawbacks in practical use:

[0005] During the laser cutting process of finned plates, the auxiliary gas can blow out the residue generated during the cutting process from the inside of the workpiece and remove the heat carried by the surface of the residue. However, the cutting residue that has been separated from the finned plate is easy to stick to the serrated support grid on the worktable surface, which undoubtedly adds difficulty to the subsequent cleaning of the residue.

[0006] When laser cutting sheet materials, if the sheet is thin, the laser still has residual energy after penetrating the sheet, which can easily cause ablation or melting of the support grid below. As the support grid is repeatedly ablated by the residual laser energy over a long period of time, some of the tip structure of the support grid is damaged, thus failing to provide effective support for the sheet. This can lead to positional displacement of the sheet during cutting. In addition, the ablated support grid needs to be replaced in time, which increases the replacement cost of the support grid.

[0007] Therefore, the present invention proposes a laser cutting apparatus and method for fin processing in heat exchanger production to solve the above-mentioned problems. Summary of the Invention

[0008] To address the shortcomings of existing technologies, this invention provides a laser cutting apparatus and method for fin processing in heat exchanger production. It solves the problem that while auxiliary gas can blow out residue and remove heat during laser cutting of finned plates, the residue easily adheres to the serrated support grid on the worktable, increasing the difficulty of subsequent cleaning. Furthermore, the residual energy after penetrating the plate can easily ablate or melt the lower support grid. Repeated ablation over a long period can damage the tip structure of the support grid, rendering it unable to effectively support the plate, causing the plate to easily shift during cutting. Additionally, the ablated support grid needs to be replaced promptly, increasing replacement costs.

[0009] To achieve the above objectives, the present invention provides the following technical solution: a laser cutting apparatus for fin processing in heat exchanger production, comprising a processing table, and further comprising:

[0010] The translation component includes electric slide rails fixedly mounted on both sides of the top of the processing table, and a slide block is slidably fitted on the top of each of the two electric slide rails. The electric slide rails are driven to move on their surfaces by commands from the controller.

[0011] The transverse component includes a linear module fixedly mounted on the opposite sidewalls of two slide blocks. The linear module is also equipped with a laser cutting component for laser cutting the fins produced by the heat exchanger. The position of the laser cutting component can be flexibly adjusted by the translation component and the transverse component.

[0012] Multiple support mechanisms are evenly arranged inside the processing table to support the fins to be laser cut. During the laser cutting process, the support tips at different positions are automatically switched and the switched support tips are rapidly cooled. At the same time, the surface impurities are automatically scraped off and the scraped cutting impurities are automatically cleaned and collected. All support mechanisms are driven by the same drive mechanism to complete the operation of support tip switching, support tip cooling and impurity collection.

[0013] Furthermore, the drive mechanism includes a servo motor fixedly mounted on the side wall of the machining table. A gear is provided on one side of the servo motor and on both sides inside the machining table. A toothed belt is fitted on the outer wall of the two gears. The output shaft of the servo motor rotates through the machining table and is fixedly connected to one of the gears.

[0014] Furthermore, the support mechanism includes a housing detachably disposed inside the processing table. A waste collection assembly for collecting cutting waste is disposed at the bottom of the housing, and a waste storage assembly for storing cutting waste is disposed on one side of the bottom of the waste collection assembly. Guide sleeves are fixedly disposed on both sides of the inner wall of the processing table below the housing. A first lifting assembly and a second lifting assembly are movably disposed on the inner sides of the housing to cooperate with each other and complete the alternating support of the heat exchanger fins to be cut. The first lifting assembly and the second lifting assembly complete the alternating lifting operation through the auxiliary guiding action of the two guide sleeves. A first driving assembly and a second driving assembly are respectively disposed below the two guide sleeves to cooperate with each other to drive the first lifting assembly and the second lifting assembly to alternately lift and lower.

[0015] Furthermore, the first drive assembly and the second drive assembly have the same structure. The first drive assembly includes a drive shaft, and a first drive disk and a second drive disk are respectively fixedly sleeved on the outer wall of the drive shaft. The first drive disk and the second drive disk have the same outer diameter, and a V-shaped groove is opened at the bottom of the first drive disk and the top of the second drive disk.

[0016] Furthermore, the waste collection assembly includes a collection pipe fixedly installed at the bottom of the box and connected to the inside of the box. The inside of the collection pipe is rotatably equipped with an auger for pushing the cutting waste to move in a directional manner. A slag discharge port for discharging the cutting waste is also opened on one side of the bottom of the collection pipe, and a power assembly for driving the auger to rotate in a directional manner is also provided at one end of the collection pipe.

[0017] Furthermore, the power assembly includes a volute fixedly mounted at one end of the collecting pipe. A vertical pipe communicating with the interior of the volute is fixedly mounted on one side of its top. A piston plate is slidably mounted inside the vertical pipe. A lifting rod is fixedly mounted on the top of the piston plate. The top end of the lifting rod slides through the vertical pipe and is fixedly connected to the bottom of the second lifting assembly. An inlet and a outlet are respectively opened on the outer wall of the volute near the collecting pipe. A first one-way valve and a second one-way valve are fixedly mounted inside the inlet and outlet, respectively. An impeller is rotatably mounted inside the volute via a rotating shaft. One end of the rotating shaft rotatably passes through the volute and is fixedly connected to the auger.

[0018] Furthermore, the waste residue storage assembly includes a guide pipe fixedly installed inside the slag discharge port. A blocking shaft is rotatably and sealed inside the guide pipe. A discharge through hole is opened on one side of the outer wall of the blocking shaft. A knob is fixedly installed at one end of the blocking shaft through the guide pipe. A marking block for marking the position of the discharge through hole is fixedly installed at one end of the blocking shaft and outside the guide pipe. A first baffle and a second baffle for cooperating with the marking block are fixedly installed on both sides of the outer wall of the guide pipe. A collection cylinder is detachably installed at the bottom of the guide pipe.

[0019] Furthermore, the first lifting assembly and the second lifting assembly have the same structure. The first lifting assembly includes a support plate and sliders fixedly disposed on both sides of the bottom of the support plate. A push rod is fixedly disposed at the bottom of the slider. A spring baffle is slidably sleeved on the outer wall of the push rod. The spring baffle is fixedly disposed on the inner wall of the guide sleeve. A second spring is slidably sleeved on the outer wall of the push rod and below the spring baffle. A plurality of supporting teeth are evenly fixedly disposed on the top of the support plate. A protective sleeve is detachably sleeved on the outer wall of the supporting teeth.

[0020] Furthermore, the laser cutting assembly includes a movable seat mounted on a linear module. An electric push rod is fixedly mounted on the top of the movable seat, and a laser cutting head is slidably mounted on the front of the movable seat. The output shaft of the electric push rod is connected to the side wall of the electric push rod and is used to adjust the height of the bottom end of the laser cutting head from the fin to be cut according to control commands. A trigger rod unit and a touch switch are respectively mounted on the upper and lower positions of the side wall of the laser cutting head. The trigger rod unit includes a trigger rod slidably mounted inside the guide cylinder. A limiting ring is fixedly sleeved on the outer wall of the trigger rod, and a first spring is slidably sleeved on the outer wall of the trigger rod between the limiting ring and the guide cylinder.

[0021] This invention also discloses a laser cutting method for fin processing in heat exchanger production, employing a laser cutting apparatus for fin processing in heat exchanger production, and the method includes the following steps:

[0022] Step 1: Lay the fins to be cut for heat exchanger production flat on a support platform consisting of multiple support mechanisms. The controller controls the laser cutting component to laser cut the fins for heat exchanger production through a preset program.

[0023] Step 2: After the laser cutting assembly completes the cutting task at one position, the cutting head height is reset, and after moving to the next cutting position, its height decreases again. At the same time as the cutting head decreases, a command to rotate by a preset angle is sent to the drive mechanism.

[0024] Step 3: After receiving the instruction to rotate at a preset angle, the support structure inside the support mechanism completes the alternating support of the bottom of the fins used for heat exchanger production, and at the same time completes the automatic cleaning of the waste generated during cutting.

[0025] This invention provides a laser cutting apparatus and method for processing fins in heat exchanger production. Compared with the prior art, it has the following advantages:

[0026] 1. A laser cutting apparatus and method for processing fins in heat exchanger production, employing an alternating lifting design of a first and second support assembly, ensures a consistent and effective support point throughout the cutting process. When one set of support teeth heats up due to laser irradiation, the other set can immediately switch to working mode. The original support assembly is rapidly cooled by immersing it in water containing rust inhibitor, ensuring its surface temperature remains low before the next support action, thus minimizing the impact of laser energy. This design avoids metal fatigue or deformation caused by prolonged exposure to high temperatures from residual laser energy at a single support point, extending the service life of both the first and second support assemblies. It also provides continuous and stable support, preventing fin vibration or displacement during cutting. Furthermore, the detachable protective sleeves on the support teeth allow for timely replacement after damage, avoiding the need to replace the entire support assembly due to tooth damage and saving replacement costs.

[0027] 2. A laser cutting device and method for fin processing in heat exchanger production, which utilizes a waste collection component linked with an auger, impeller, first lifting component, and second lifting component. The mechanical energy generated by the lifting of the second lifting component drives the piston plate to move up and down reciprocally. The pressure of clean water drives the impeller to rotate, which in turn drives the auger to rotate unidirectionally, thus directionally conveying the cutting waste to the waste storage component. The waste pushing and collection can be completed without additional energy, thereby realizing the automatic conveying of cutting waste. Moreover, the auger is connected by a one-way bearing to ensure that the waste moves directionally to the waste storage component. With the help of a detachable collection cylinder, the waste is automatically collected and discharged, reducing manual intervention, keeping the inside of the box clean, and significantly reducing the frequency and difficulty of manual cleaning.

[0028] 3. A laser cutting device and method for fin processing in heat exchanger production, wherein the connection between the collection pipe and the housing and volute is sealed with a gasket and waterproof adhesive, and the auger is connected by a one-way bearing to ensure that the clean water flows in only one direction and prevents the waste residue from flowing back. A rotatable barrier shaft is installed in the feed pipe, and the discharge through the cooperation of the marker block and the baffle can achieve precise opening and closing of the discharge through hole. When cleaning the waste residue storage component, the discharge through hole is closed without affecting the cooling of the clean water inside the housing and avoiding the accumulation and blockage of waste residue.

[0029] 4. A laser cutting apparatus and method for fin processing in heat exchanger production, wherein the laser cutting head is equipped with a trigger rod and a touch switch. When the cutting head descends to a set height, the trigger rod touches the touch switch, automatically triggering the servo motor to rotate 180° and completing the switching of the support components. This allows the laser tube cutting head to be perfectly matched to each cutting operation, meaning that cooling is only performed during the cutting process, ensuring that the first and second support components are in a highly efficient cooling cycle. Attached Figure Description

[0030] Figure 1 This is a schematic diagram of the overall three-dimensional structure of the present invention;

[0031] Figure 2 This is a schematic diagram of the first state structure of the present invention with the processing table removed;

[0032] Figure 3 This is a schematic diagram of the second state structure of the removal of the processing table according to the present invention;

[0033] Figure 4 This is a schematic diagram of the first overall structure of the support mechanism of the present invention;

[0034] Figure 5 For the present invention Figure 4 A magnified structural diagram of part A in the diagram;

[0035] Figure 6 This is a schematic diagram of the second overall structure of the support mechanism of the present invention;

[0036] Figure 7 For the present invention Figure 6 A magnified structural diagram of part B in the diagram;

[0037] Figure 8 This is a schematic diagram of the disassembled structure of the support mechanism of the present invention;

[0038] Figure 9 This is a schematic diagram of the first cross-sectional structure of the support structure of the present invention;

[0039] Figure 10 For the present invention Figure 9 A magnified structural diagram of part C in the diagram;

[0040] Figure 11 This is a schematic diagram of the second cross-sectional structure of the support mechanism of the present invention;

[0041] Figure 12 For the present invention Figure 11 A magnified structural diagram of part D in the diagram;

[0042] Figure 13 This is a schematic diagram of the waste collection component structure of the present invention;

[0043] Figure 14For the present invention Figure 13 A magnified structural diagram of part E in the diagram;

[0044] Figure 15 This is a schematic diagram of the decomposition state structure of the waste residue storage component of the present invention;

[0045] Figure 16 This is a schematic cross-sectional view of the feed tube of the present invention;

[0046] Figure 17 This is a schematic diagram of the disassembled structure of the first lifting component of the present invention;

[0047] Figure 18 This is a schematic diagram of the laser cutting component structure of the present invention;

[0048] Figure 19 For the present invention Figure 18 A magnified structural diagram of part F in the diagram.

[0049] In the diagram: 1. Processing table; 2. Electric slide rail; 3. Slide base; 4. Linear module; 5. Laser cutting assembly; 51. Moving seat; 52. Electric push rod; 53. Laser cutting head; 54. Trigger rod unit; 541. Guide cylinder; 542. Trigger rod; 543. First spring; 55. Touch switch; 6. Support mechanism; 61. Housing; 62. Waste collection assembly; 621. Collection pipe; 622. Volute; 623. Vertical pipe; 624. Lifting rod; 625. First one-way valve; 626. Second one-way valve; 627. Impeller; 628. Screwdriver; 629. Piston plate; 63. Waste storage assembly; 631. Guide pipe; 632. 633. Barrier shaft; 634. Discharge through hole; 635. Marker block; 636. Knob; 637. First baffle; 638. Second baffle; 639. Collection cylinder; 64. Guide sleeve; 65. First lifting assembly; 651. Support plate; 652. Slider; 653. Push rod; 654. Spring baffle; 655. Second spring; 656. Support teeth; 657. Protective sleeve; 66. Second lifting assembly; 67. First drive assembly; 671. Transmission shaft; 672. First drive disc; 673. Second drive disc; 674. V-groove; 68. Second drive assembly; 69. Cleaning steel brush; 7. Servo motor; 8. Gear; 9. Toothed belt. Detailed Implementation

[0050] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0051] This invention provides three technical solutions: a laser cutting device for fin processing in heat exchanger production, specifically including the following embodiments:

[0052] like Figures 1-5 A first embodiment is shown: a laser cutting apparatus for processing fins in heat exchanger production, including a processing table 1, and further comprising:

[0053] The translation component includes electric slide rails 2 fixedly mounted on both sides of the top of the processing table 1. Each of the two electric slide rails 2 has a slide block 3 slidably mounted on its top. The electric slide rails 2 are driven to move on their surface by the controller command.

[0054] The transverse component includes a linear module 4 fixedly mounted on the opposite sidewalls of two slide blocks 3. The linear module 4 is also equipped with a laser cutting component 5 for laser cutting the fins produced by the heat exchanger. The position of the laser cutting component 5 can be flexibly adjusted by the translation component and the transverse component.

[0055] Multiple support mechanisms 6 are evenly arranged inside the processing table 1 to support the fins to be laser cut. During the laser cutting process, the support tips at different positions are automatically switched and the switched support tips are rapidly cooled. At the same time as the support tips are cooled, the impurities attached to the surface are automatically scraped off and the scraped cutting impurities are automatically cleaned and collected. All multiple support mechanisms 6 are driven by the same drive mechanism to complete the operation of support tip switching, support tip cooling and impurity collection.

[0056] In this embodiment, the drive mechanism includes a servo motor 7 fixedly mounted on the side wall of the processing table 1. A gear 8 is mounted on one side of the servo motor 7 and on both sides inside the processing table 1. A toothed belt 9 is fitted onto the outer walls of both gears 8. The output shaft of the servo motor 7 rotates through the processing table 1 and is fixedly connected to one of the gears 8. Multiple transmission shafts 671 in the first drive assembly 67 or the second drive assembly 68 are fixedly connected end-to-end. The two gears 8 are respectively fixedly connected to the transmission shafts 671 in the first drive assembly 67 and the second drive assembly 68 near the servo motor 7. Through the transmission of the toothed belt 9, the servo motor 7 can simultaneously drive the transmission shafts 671 on both sides to rotate synchronously.

[0057] like Figures 4-17The second embodiment is shown, differing from the first embodiment in that: the support mechanism 6 includes a housing 61 detachably disposed inside the processing table 1. A waste slag collection component 62 for collecting cutting waste slag is disposed at the bottom of the housing 61, and a waste slag storage component 63 for storing cutting waste slag is disposed on one side of the bottom of the waste slag collection component 62. Guide sleeves 64 are fixedly disposed on both sides of the inner wall of the processing table 1 below the housing 61. A first lifting component 65 and a second lifting component 66 are movably disposed on the inner sides of the housing 61, cooperating to alternately support the production fins of the heat exchanger to be cut. The first lifting component 65 and the second lifting component 66 alternately lift and lower through the auxiliary guiding action of the two guide sleeves 64. A first drive component 67 and a second drive component 68 are respectively disposed below the two guide sleeves 64, cooperating to drive the first lifting component 65 and the second lifting component 66 to alternately lift and lower. The housing 61 is filled with clean water mixed with a rust inhibitor.

[0058] In this embodiment, the first drive assembly 67 and the second drive assembly 68 have the same structure. The first drive assembly 67 includes a drive shaft 671, and a first drive disk 672 and a second drive disk 673 are respectively fixedly sleeved on the outer wall of the drive shaft 671. The first drive disk 672 and the second drive disk 673 have the same outer diameter, and a V-shaped groove 674 is formed at the bottom of the first drive disk 672 and the top of the second drive disk 673. The inner edge of the V-shaped groove 674 is rounded to ensure that the push rod 653 can move smoothly along the inner wall of the V-shaped groove 674. The bottom end of the push rod 653 in the first lifting assembly 65 and the second lifting assembly 66 slides along the outer wall of the first drive disk 672 and the second drive disk 673, respectively.

[0059] In this embodiment, the waste collection assembly 62 includes a collection pipe 621 fixedly installed at the bottom of the housing 61 and connected to the interior of the housing 61. An auger 628 for directional movement of the cut waste is rotatably installed inside the collection pipe 621. A discharge port for discharging the cut waste is also provided on one side of the bottom of the collection pipe 621, and a power assembly for driving the auger 628 to rotate directionally is provided at one end of the collection pipe 621. A rectangular through slot is provided at the bottom of the housing 61, and the top opening of the collection pipe 621 is opposite to the rectangular through slot. A sealing gasket is provided at the connection point between the collection pipe 621, the volute 622, and the bottom of the housing 61 to prevent leakage of clean water inside the housing 61.

[0060] In this embodiment, the power assembly includes a volute 622 fixedly mounted at one end of the collection pipe 621. A vertical pipe 623, communicating with the interior of the volute 622, is fixedly mounted on one side of the top. A piston plate 629 is slidably mounted inside the vertical pipe 623, and a lifting rod 624 is fixedly mounted on the top of the piston plate 629. The top end of the lifting rod 624 slides through the vertical pipe 623 and is fixedly connected to the bottom of the second lifting assembly 66. An inlet and an outlet are respectively opened on the outer wall of the volute 622 near the collection pipe 621. A first one-way valve 625 and a second one-way valve 626 are fixedly mounted inside the inlet and outlet, respectively. An impeller 627 is rotatably mounted inside the volute 622 via a rotating shaft. One end of the rotating shaft rotatably passes through the volute 622 and is fixedly connected to the auger 628. The first one-way valve 625 only allows clean water to enter the volute 622, and the second one-way valve 626 only allows clean water in the volute 622 to drain into the collection pipe 621. The joints between the volute 622, the vertical pipe 623, the collection pipe 621, and the housing 61 are all sealed with waterproof sealant. The connection between the auger 628 and the collection pipe 621 is made by a one-way bearing, meaning that the auger 628 can only rotate in one direction, and in this direction of rotation, it can push the cutting waste to the waste storage component 63.

[0061] In this embodiment, the waste residue storage assembly 63 includes a guide pipe 631 fixedly disposed inside the slag discharge port. A blocking shaft 632 is rotatably disposed inside the guide pipe 631. A discharge through hole 633 is opened on one side of the outer wall of the blocking shaft 632. A knob 635 is fixedly disposed at one end of the blocking shaft 632 through the guide pipe 631. A marking block 634 for marking the position of the discharge through hole 633 is fixedly disposed at one end of the blocking shaft 632 and outside the guide pipe 631. A first baffle 636 and a second baffle 637 for cooperating with the marking block 634 are fixedly disposed on both sides of the outer wall of the guide pipe 631. A collection cylinder 638 is detachably disposed at the bottom of the guide pipe 631. The opening size of the discharge through hole 633 is the same as the inner diameter of the guide pipe 631. When the side wall of the marker block 634 and the first baffle 636 abuts, the discharge through hole 633 and the guide pipe 631 are completely connected. When the side wall of the marker block 634 and the second baffle 637 abuts, the outer wall of the blocking shaft 632 blocks the channel of the guide pipe 631.

[0062] In this embodiment, the first lifting assembly 65 and the second lifting assembly 66 have the same structure. The first lifting assembly 65 includes a support plate 651 and sliders 652 fixedly disposed on both sides of the bottom of the support plate 651. A push rod 653 is fixedly disposed at the bottom of the slider 652. A spring baffle 654 is slidably sleeved on the outer wall of the push rod 653. The spring baffle 654 is fixedly disposed on the inner wall of the guide sleeve 64. A second spring 655 is slidably sleeved on the outer wall of the push rod 653 and below the spring baffle 654. A plurality of support teeth 656 are evenly fixedly disposed on the top of the support plate 651. A protective sleeve 657 is detachably sleeved on the outer wall of the support teeth 656. The push rod 653 in both the first lifting assembly 65 and the second lifting assembly 66 slides through the guide sleeve 64 at the corresponding position and extends to the outside. The second spring 655 is disposed between the spring baffle 654 and the inner wall of the guide sleeve 64. When the pallet 651 moves down to its limit position inside the box 61, the clean water inside the box 61 just overflows the top of the protective sleeve 657, and the water level is lower than the top of the box 61.

[0063] like Figures 18-19 The third embodiment is shown, which differs from the second embodiment in that: the laser cutting assembly 5 includes a movable seat 51 disposed on the linear module 4, an electric push rod 52 is fixedly disposed on the top of the movable seat 51, and a laser cutting head 53 is slidably disposed on the front side of the movable seat 51. The output shaft of the electric push rod 52 is connected to the side wall of the electric push rod 52, and is used to adjust the height of the bottom end of the laser cutting head 53 from the fin to be cut according to the control command. A trigger rod unit 54 and a touch switch 55 are respectively disposed at the upper and lower positions of the side wall of the laser cutting head 53. The trigger rod unit 54 includes a trigger rod 542 slidably disposed inside the guide cylinder 541. A limiting ring is fixedly sleeved on the outer wall of the trigger rod 542, and a first spring 543 is slidably sleeved on the outer wall of the trigger rod 542 between the limiting ring and the guide cylinder 541. The trigger lever 542 and the touch switch 55 are on the same vertical line. After the touch switch 55 is triggered by the trigger lever 542, the servo motor 7 is controlled to rotate 180 degrees. The minimum distance that the laser cutting head 53 moves down can also meet the condition that the trigger lever 542 triggers the touch switch 55.

[0064] The present invention also provides a laser cutting method for fin processing in heat exchanger production, employing a laser cutting apparatus for fin processing in heat exchanger production, and the method includes the following steps:

[0065] Step 1: Lay the fins to be cut for heat exchanger production flat on a support platform consisting of multiple support mechanisms 6. The controller controls the laser cutting assembly 5 to perform laser cutting on the fins for heat exchanger production through a preset program.

[0066] Step 2: After the laser cutting assembly 5 completes the cutting task at one position, the height of the cutting head is reset, and after moving to the next cutting position, its height drops again. At the same time as the cutting head drops, a command to rotate by a preset angle is sent to the drive mechanism.

[0067] Step 3: After receiving the instruction to rotate at a preset angle, the support structure inside the support mechanism 6 completes the alternating support of the bottom of the fins used for heat exchanger production, and at the same time completes the automatic cleaning of the waste generated during cutting.

[0068] The specific process is as follows: The controller controls the electric push rod 52 to drive the laser cutting head 53 to descend to a certain position and then cut the fins. At the same time, the bottom of the trigger rod 542 touches the touch switch 55. The touch switch 55 sends a 180-degree rotation command to the servo motor 7 through wireless transmission. While the output shaft of the servo motor 7 drives one of the gears 8 to rotate, the power drives the other gear 8 to rotate synchronously through the toothed belt 9. The multiple first drive components 67 and second drive components 68 located on both sides rotate synchronously. At this time, the first drive disk 672 in the first drive component 67 and the second drive component 68, which are in relative positions, gradually changes from the state where the V-shaped groove 674 is facing down to the state where it is facing up, while the second drive disk 673 gradually changes from the position where the V-shaped groove 674 is facing up to the state where it is facing down. As 673 rotates, the push rods 653 on one side of the bottom of the first lifting assembly 65 and the second lifting assembly 66 slide along the outer walls of the first drive disk 672 and the second drive disk 673, respectively. When the push rod 653 in the first lifting assembly 65 enters the V-shaped groove 674 on the outer wall of the first drive disk 672, the top of the first lifting assembly 65 is submerged in the water inside the housing 61, while the push rod 653 in the second lifting assembly 66 is located in the area of ​​the second drive disk 673 excluding the V-shaped groove 674, so that the second lifting assembly 66 can be supported and its top is located outside the housing 61. It should be noted that during the process of one push rod 653 sliding out of the V-shaped groove 674, the push rod 653 in the other position is always along the area of ​​the first drive disk 672 or the second drive disk 673 excluding the V-shaped groove 674.

[0069] During the relative lifting and lowering process of the first lifting component 65 and the second lifting component 66, the cutting waste attached to their outer walls is scraped off by the relative shearing force and the cleaning action of the cleaning steel brush 69. The waste falls into the box 61 under the action of gravity and gradually settles into the waste collection component 62.

[0070] During the descent of the second lifting assembly 66, the lifting rod 624 is simultaneously pushed down. Since the inside of the volute 622 is filled with clean water, when the piston plate 629 pushes the clean water to flow, the clean water drives the impeller 627 to rotate. At the same time, the impeller 627 drives the auger 628 to rotate in a specific direction. The cutting waste located at the bottom of the collection pipe 621 is pushed towards the slag discharge port and enters the collection cylinder 638 through the guide pipe 631 and the discharge through hole 633 under the action of gravity. After a period of time, the knob 635 can be turned to rotate the marker block 634 to a position close to the side wall of the second baffle 637. At this time, the discharge through hole 633 and the guide pipe 631 are in a non-connected state. Then, the collection cylinder 638 can be disassembled from the bottom of the guide pipe 631 to clean the inner cavity.

[0071] It should be noted that, in this document, relational terms such as "first" and "second" are used only to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such process, method, article, or apparatus.

[0072] Although embodiments of the invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A laser cutting apparatus for fin processing in heat exchanger production, comprising a processing table, characterized in that, Also includes: The translation component includes electric slide rails fixedly mounted on both sides of the top of the processing table, and a slide block is slidably fitted on the top of each of the two electric slide rails. The electric slide rails are driven to move on their surfaces by commands from the controller. The transverse component includes a linear module fixedly mounted on the opposite sidewalls of two slide blocks. The linear module is also equipped with a laser cutting component for laser cutting the fins produced by the heat exchanger. The position of the laser cutting component can be flexibly adjusted by the translation component and the transverse component. Multiple support mechanisms are evenly arranged inside the processing table to support the fins to be laser cut. During the laser cutting process, the support tips at different positions are automatically switched and the switched support tips are rapidly cooled. At the same time, the surface impurities are automatically scraped off and the scraped cutting impurities are automatically cleaned and collected. All support mechanisms are driven by the same drive mechanism to complete the operation of support tip switching, support tip cooling and impurity collection. The support mechanism includes a detachable housing inside the processing table. A waste collection assembly for collecting cutting waste is located at the bottom of the housing, and a waste storage assembly for storing cutting waste is located on one side of the bottom of the waste collection assembly. Guide sleeves are fixedly installed on the inner wall of the processing table, on both sides below the housing. A first lifting assembly and a second lifting assembly are movably installed on the inner sides of the housing to cooperate and alternately support the fins of the heat exchanger to be cut. The first and second lifting assemblies alternately lift and lower through the auxiliary guidance of the two guide sleeves. A first driving assembly and a second driving assembly are respectively installed below the two guide sleeves to cooperate in driving the first and second lifting assemblies to alternately lift and lower. The first drive assembly and the second drive assembly have the same structure. The first drive assembly includes a drive shaft. A first drive disk and a second drive disk are respectively fixedly sleeved on the outer wall of the drive shaft. The first drive disk and the second drive disk have the same outer diameter, and a V-shaped groove is opened at the bottom of the first drive disk and the top of the second drive disk.

2. The laser cutting device for fin processing in heat exchanger production according to claim 1, characterized in that: The drive mechanism includes a servo motor fixedly mounted on the side wall of the machining table. A gear is provided on one side of the servo motor and on both sides inside the machining table. A toothed belt is fitted on the outer wall of the two gears. The output shaft of the servo motor rotates through the machining table and is fixedly connected to one of the gears.

3. The laser cutting device for fin processing in heat exchanger production according to claim 1, characterized in that: The waste collection assembly includes a collection pipe fixedly installed at the bottom of the box and connected to the inside of the box. The inside of the collection pipe is equipped with an auger for directional movement of the cutting waste. A slag discharge port for discharging the cutting waste is also provided on one side of the bottom of the collection pipe, and a power assembly for driving the auger to rotate in a directional manner is also provided at one end of the collection pipe.

4. The laser cutting device for fin processing in heat exchanger production according to claim 3, characterized in that: The power assembly includes a volute fixedly mounted at one end of the collecting pipe. A vertical pipe communicating with the interior of the volute is fixedly mounted on one side of its top. A piston plate is slidably mounted inside the vertical pipe. A lifting rod is fixedly mounted on the top of the piston plate. The top end of the lifting rod slides through the vertical pipe and is fixedly connected to the bottom of the second lifting assembly. An inlet and a outlet are respectively opened on the outer wall of the volute near the collecting pipe. A first one-way valve and a second one-way valve are fixedly mounted inside the inlet and outlet, respectively. An impeller is rotatably mounted inside the volute via a rotating shaft. One end of the rotating shaft rotatably passes through the volute and is fixedly connected to the auger.

5. The laser cutting device for fin processing in heat exchanger production according to claim 3, characterized in that: The waste residue storage assembly includes a guide pipe fixedly installed inside the slag discharge port. A barrier shaft is rotatably and sealed inside the guide pipe. A discharge through hole is opened on one side of the outer wall of the barrier shaft. One end of the barrier shaft rotatably passes through the guide pipe and is fixedly equipped with a knob. A marking block for marking the position of the discharge through hole is fixedly installed at one end of the barrier shaft and outside the guide pipe. A first baffle and a second baffle for cooperating with the marking block are fixedly installed on both sides of the outer wall of the guide pipe. A collection cylinder is detachably installed at the bottom of the guide pipe.

6. The laser cutting device for fin processing in heat exchanger production according to claim 1, characterized in that: The first lifting assembly and the second lifting assembly have the same structure. The first lifting assembly includes a support plate and sliders fixedly disposed on both sides of the bottom of the support plate. A push rod is fixedly disposed at the bottom of the slider. A spring baffle is slidably sleeved on the outer wall of the push rod. The spring baffle is fixedly disposed on the inner wall of the guide sleeve. A second spring is slidably sleeved on the outer wall of the push rod and below the spring baffle. A plurality of supporting teeth are evenly fixedly disposed on the top of the support plate. A protective sleeve is detachably sleeved on the outer wall of the supporting teeth.

7. The laser cutting device for fin processing in heat exchanger production according to claim 1, characterized in that: The laser cutting assembly includes a movable base mounted on a linear module. An electric push rod is fixedly mounted on the top of the movable base, and a laser cutting head is slidably mounted on the front of the movable base. The electric push rod is used to adjust the height of the bottom end of the laser cutting head from the fin to be cut according to control commands. A trigger rod unit and a touch switch are respectively mounted on the upper and lower positions of the side wall of the laser cutting head. The trigger rod unit includes a guide cylinder and a trigger rod slidably mounted inside the guide cylinder. A limiting ring is fixedly sleeved on the outer wall of the trigger rod, and a first spring is slidably sleeved on the outer wall of the trigger rod between the limiting ring and the guide cylinder.

8. A laser cutting method for processing fins in heat exchanger production, characterized in that: The method using the laser cutting apparatus for fin processing in heat exchanger production as described in any one of claims 1-7 includes the following steps: Step 1: Lay the fins to be cut for heat exchanger production flat on a support platform consisting of multiple support mechanisms. The controller controls the laser cutting component to laser cut the fins for heat exchanger production through a preset program. Step 2: After the laser cutting assembly completes the cutting task at one position, the cutting head height is reset, and after moving to the next cutting position, its height decreases again. At the same time as the cutting head decreases, a command to rotate by a preset angle is sent to the drive mechanism. Step 3: After receiving the instruction to rotate at a preset angle, the support structure inside the support mechanism completes the alternating support of the bottom of the fins used for heat exchanger production, and at the same time completes the automatic cleaning of the waste generated during cutting.

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