Fin forming machine

Abstract

The invention discloses a fin forming machine. The fin forming machine comprises a rack, a feeding device, a roller forming mechanism and a cutting-off device, wherein the feeding device, the roller forming mechanism and the cutting-off device are sequentially arranged on the rack; the feeding device comprises a material roll support and a driving feeding mechanism, and the driving feeding mechanism is arranged adjacent to the material roll support and used for pulling and conveying a material roll on the material roll support forwards. The driving feeding mechanism comprises a driving part, a driving wheel and a driven wheel, the driving part drives the driving wheel, the driven wheel is located below the driving wheel and is opposite to the driving wheel, and a roller gap used for clamping and conveying a material belt is formed between the driven wheel and the driving wheel; the roller forming mechanism is used for rolling the conveyed material coil so as to form continuous corrugated fins; the cutting-off device is used for cutting off the corrugated fins according to the preset length. High-precision, high-efficiency and high-stability production of the fins is achieved, the product quality is remarkably improved, meanwhile, the maintenance and adjustment cost is reduced, and the device is suitable for large-scale automatic production requirements.

Description

Technical Field

[0001] This invention relates to the field of radiator manufacturing equipment, specifically a fin forming machine. Background Technology

[0002] Finned heat exchangers used in refrigeration, air conditioning, and automotive industries rely heavily on fins as one of their core components. Fins are typically formed from thin aluminum strips using a fin forming machine, resulting in fins with complex corrugated shapes.

[0003] In the continuous production process of fin forming machines, stable and precise feeding of metal coils (such as aluminum strips) is a key prerequisite for ensuring forming quality and production efficiency. Existing technology includes a feeding device that mounts the drive motor on the coil support, directly driving the coil unwinding. In this structure, because the motor directly drives the coil, the feeding length is theoretically equal to the coil's circumference. However, the coil's diameter continuously decreases during the unwinding process. With a constant motor speed, the actual length of the strip released in each revolution becomes shorter and shorter, making it impossible to maintain a constant feeding length. If a complex algorithm were used to adjust the motor speed in real time to compensate for diameter changes, the control system would be costly and still contain errors. This directly leads to inaccurate fin forming pitch, severely affecting product consistency. Furthermore, the aforementioned structure struggles to provide stable and reliable feeding tension. The coil's moment of inertia varies with its diameter, easily leading to unwinding too quickly (slack) or too slowly (tight). Summary of the Invention

[0004] The purpose of this invention is to overcome the shortcomings of the prior art and provide a fin forming machine that achieves high-precision, high-efficiency, and high-stability fin production.

[0005] To achieve the above objectives, the following technical solution is adopted:

[0006] A fin forming machine, characterized in that it includes a frame and a feeding device, a roll forming mechanism and a cutting device arranged sequentially on the frame along the material conveying direction;

[0007] The feeding device includes a roll support and an active feeding mechanism. The active feeding mechanism is disposed adjacent to the roll support and is used to pull and convey the roll on the roll support forward. The active feeding mechanism includes a frame, a driving component, a driving wheel, and a driven wheel. The motor is disposed on the upper part of the frame. The driving component drives the driving wheel. The driven wheel is located below the driving wheel and is disposed opposite to the driving wheel. A roller gap is formed between the driven wheel and the driving wheel for clamping and conveying the material belt.

[0008] The roll forming mechanism is used to roll the incoming coil to form continuous corrugated fins.

[0009] The cutting device is used to cut the corrugated fins to a predetermined length.

[0010] Furthermore, the active feeding mechanism also includes a driven wheel fine-tuning device, which includes a linear driver and a sliding bearing seat. The linear driver is located at the bottom of the frame, and the sliding bearing seat is connected to the output end of the linear driver. The frame is provided with a slide rail, and the sliding bearing seat is slidably engaged with the slide rail. The driven wheel is rotatably supported on the sliding bearing seat through a bearing.

[0011] Furthermore, the feeding device also includes a guide roller, which is disposed between the material roll support and the active feeding mechanism.

[0012] Furthermore, the roll forming mechanism includes a forming blade and an online cleaning device for the forming blade;

[0013] The forming blade includes an upper forming blade and a lower forming blade arranged opposite to each other, and the online cleaning device for the forming blade includes:

[0014] A cleaning oil supply unit is used to spray cleaning oil onto the upper forming blade and the lower forming blade. The cleaning oil supply unit includes an oil tank, an upper nozzle, and a lower nozzle. The upper nozzle and the lower nozzle are respectively located on one side of the upper forming blade and the other side of the lower forming blade, and the upper nozzle and the lower nozzle are connected to the oil tank. An airflow purging unit is used to purge gas onto the upper forming blade and the lower forming blade. The airflow purging unit includes an upper air nozzle located on the other side of the upper forming blade and a lower air nozzle located on the other side of the lower forming blade.

[0015] An oil mist recovery unit is used to collect and filter oil mist, metal powder, and sludge generated during the cleaning process. The oil mist recovery unit includes an upper oil mist inlet, a lower oil mist inlet, and a filter. The upper oil mist inlet is located next to the upper air nozzle, and the lower oil mist inlet is located next to the lower air nozzle. The upper and lower oil mist inlets are connected to the filter.

[0016] Furthermore, there are two oil tanks, an upper oil tank and a lower oil tank. The upper nozzle is connected to the upper oil tank through a pipeline, and the lower nozzle is connected to the lower oil tank through a pipeline.

[0017] There are two filters, an upper filter and a lower filter. The upper filter is connected to the upper oil mist inlet, and the lower filter is connected to the lower oil mist inlet.

[0018] The oil outlet of the upper filter is connected to the upper oil tank, and the oil outlet of the lower filter is connected to the lower oil tank.

[0019] Furthermore, the cutting device includes a feeding channel, a spiral feeding mechanism, and a cutting mechanism. The spiral feeding mechanism is located below the feeding channel and includes a connected spiral conveying rod and a spiral drive assembly. The spiral drive assembly drives the spiral conveying rod to rotate to convey material. The cutting mechanism is located on the discharge side of the spiral feeding mechanism and includes a support, a blade holder that can be slidably mounted on the support, a cutter mounted on the blade holder, and a drive device for driving the blade holder to reciprocate. The cutter includes a connected blade body and a cutting edge, and the transition portion connecting the blade body and the cutting edge is configured to adapt to the shape of the crest section of the corrugations of the formed fin.

[0020] Furthermore, the cutter is inclined, and its inclination direction is adapted to the inclination direction of the material conveyed by the spiral conveyor.

[0021] Furthermore, the cutting mechanism also includes a guide block, which is disposed on the side corresponding to the upper end point of the cutter. The guide block has a through hole for the finned material strip to pass through, and the shape of the guide block adjacent to the cutter is adapted to the cutter.

[0022] Furthermore, it also includes a heat dissipation strip height adjustment device, which is disposed between the feeding device and the roll forming mechanism; the heat dissipation strip height adjustment device includes:

[0023] Base;

[0024] The pressing adjustment device includes a bracket, a cylinder, and a pressing block. The bracket is located above the base, the cylinder is mounted on the bracket and its piston rod is set vertically downward, and the pressing block is connected to the end of the piston rod.

[0025] The controller and pneumatic control circuit include a solenoid valve and an electro-proportional valve. The solenoid valve is connected to the cylinder and is used to control the on / off state of the cylinder. The electro-proportional valve is connected to the cylinder and is used to adjust the air supply pressure of the cylinder. The controller is connected to the solenoid valve and the electro-proportional valve respectively. The controller drives the pressing block to perform a pressing action by controlling the pneumatic control circuit.

[0026] Furthermore, the pressing block is a block-shaped structure with a flat pressing surface at the bottom; the base is provided with a support plate that is vertically opposite to the pressing block, and the top of the support plate has a flat support surface.

[0027] The beneficial effects of this invention are:

[0028] 1. The feeding device of this invention moves the drive motor from the roll support to the downstream active feeding mechanism, which clamps the feed strip by driving a fixed-diameter drive wheel and driven wheel. This method completely eliminates the dependence of the feeding length on the changing roll diameter. The feeding length is determined only by the circumference of the drive wheel and its number of rotations, which is a fixed and precise value. This fundamentally solves the problem of feeding length fluctuation caused by changes in roll diameter, ensuring the accuracy of each forming step and improving product dimensional consistency.

[0029] 2. The heat dissipation strip height adjustment device is installed at the feeding station before the forming mold (i.e., corrugated roller cutter) of the fin forming machine. The controller controls the electric proportional valve, thereby precisely controlling the air supply pressure of the cylinder to adjust the pressing block to apply a precisely controllable pre-compression force to the unformed flat metal strip (aluminum strip), indirectly and stably controlling the peak height of the final formed heat dissipation strip, avoiding equipment wear and precision fluctuations caused by directly adjusting the cutter.

[0030] 3. The roll forming mechanism, equipped with upper and lower nozzles and air nozzles, can continuously or intermittently spray and blow clean the upper and lower forming blades while the fin forming machine is operating normally. This completely changes the traditional operation mode that requires manual cleaning during machine shutdown, achieving automated production without stopping the machine and greatly improving production capacity. It can promptly remove aluminum powder and sludge (a mixture of aluminum powder and oil) from the surface of the forming blades, effectively preventing secondary contamination and pressure damage to the fin surface by aluminum powder, significantly reducing the product defect rate, and ensuring the stability and consistency of product quality in mass production.

[0031] 4. The shape of the connecting transition section of the cutter in the cutting mechanism is adapted to the corrugated crest section of the formed fin, so that the cutter can fit the fin contour during cutting, reducing stress concentration and material deformation, thereby obtaining fin segments with flat cuts and good shape retention; the spiral feeding mechanism realizes the smooth and continuous conveying of materials, and combined with the inclined cutting mechanism, the feeding and cutting actions are well matched in direction and timing, improving the continuity and efficiency of the cutting process, which is suitable for the automated production of corrugated fins;

[0032] 5. This invention enables high-precision, high-efficiency, and high-stability production of fins, significantly improving product quality while reducing maintenance and adjustment costs, making it suitable for large-scale automated production needs. Attached Figure Description

[0033] Figure 1 This is a schematic diagram of the structure of the present invention;

[0034] Figure 2 This is a schematic diagram of the feeding device.

[0035] Figure 3This is a schematic diagram of the guide roller and the active feeding mechanism.

[0036] Figure 4 A schematic diagram of the guide rollers and the active feeding mechanism (from another angle);

[0037] Figure 5 This is a schematic diagram of the heat dissipation strip height adjustment device;

[0038] Figure 6 A schematic diagram of the heat dissipation strip height adjustment device (from another angle);

[0039] Figure 7 This is a schematic diagram of the heat dissipation strip height adjustment device (with hidden sliding bracket).

[0040] Figure 8 This is a schematic diagram of the roll forming mechanism (hiding the housing portion).

[0041] Figure 9 This is a partial structural diagram of the roll forming mechanism;

[0042] Figure 10 This is a partial structural diagram of the roll forming mechanism;

[0043] Figure 11 This is a schematic diagram of the lower air nozzle of the roll forming mechanism;

[0044] Figure 12 This is a schematic diagram of the air nozzle structure of the roll forming mechanism.

[0045] Figure 13 This is a schematic diagram of the cutting device.

[0046] Figure 14 for Figure 13 Enlarged view of part A;

[0047] Figure 15 A schematic diagram of the cutting device (from another angle);

[0048] Figure 16 A schematic diagram of the cutting device (from another angle);

[0049] Figure 17 This is a schematic diagram of the cutting device (some components are hidden).

[0050] Figure 18 This is a schematic diagram of the cutter structure of the cutting device.

[0051] Explanation of symbols in the attached drawings:

[0052] Frame 1, Feeding device 2, Roll support 321, Guide roller 22, Limiting wheel 221, Active feeding mechanism 23, Frame body 231, Support rod 2311, Slide rail 23111, Motor 232, Drive wheel 233, Transmission mechanism 2331, Driven wheel 234, Bearing 2341, Sliding bearing seat 2351, Cylinder 2352; Heat sink height adjustment device 3, Base 31, Support plate 311, Bracket 321, Cylinder 322, Pressing block 323, Guide rod 324, Sliding sleeve frame 325, Solenoid valve 331, Electro-proportional valve 332, Transmission wheel assembly 34; Roll forming mechanism 4, Upper forming blade 41, Lower forming blade 42, Upper oil tank 431, Lower oil tank 432, Upper nozzle 43 3. Lower nozzle 434, upper air nozzle 441, second air outlet 4411, lower air nozzle 442, inclined surface 4421, vertical surface 4422, first air outlet 4423, upper oil mist inlet 451, lower oil mist inlet 452, upper filter 453, lower filter 454; Cutting device 5, feeding channel 51, screw conveyor 521, first motor 522, pulley assembly 523, bracket 531, knife holder 532, bolt 5321, locking part 5322, cutter 533, blade 5331, blade edge 5332, guide block 534, through hole 5341, second motor 541, drive wheel 542, eccentric wheel 543, linkage wheel 544, slider 545, guide rail 546. Detailed Implementation

[0053] To make the objectives, technical solutions, and advantages of this invention clearer, the invention will be further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative and not intended to limit the invention.

[0054] Example

[0055] refer to Figure 1 The fin forming machine includes a frame 1 and a feeding device 2, a heat dissipation strip height adjustment device 3, a roll forming mechanism 4, and a cutting device 5 arranged sequentially on the frame 1 along the material conveying direction;

[0056] Reference Figures 2-4 The feeding device 2 includes a roll support 321, a guide roller 22, and an active feeding mechanism 23. The active feeding mechanism 23 is located beside the roll support 321, and the guide roller 22 is located between the roll support 321 and the active feeding mechanism 23.

[0057] The active feeding mechanism 23 includes a frame 231, a drive component, a drive wheel 233, a driven wheel 234, and a driven wheel fine-tuning device. The drive component is a motor 232, which is located on the upper part of the frame 231. The drive wheel 233 is located below the motor 232 and is connected to the output shaft of the motor 232 through a transmission mechanism 2331. The transmission mechanism 2331 can be a belt drive mechanism or a gear chain drive mechanism. The driven wheel 234 is located below the drive wheel 233 and is arranged opposite to the drive wheel 233. A roller gap is formed between the driven wheel 234 and the drive wheel 233 for clamping and conveying the material belt.

[0058] The driven wheel fine-tuning device includes a linear actuator and a sliding bearing seat 2351. The linear actuator is a cylinder 2352. The cylinder 2352 is located at the bottom of the frame 231, and the sliding bearing seat 2351 is connected to the piston rod of the cylinder 2352. The frame 231 has two sets of symmetrically arranged support rods. Each set of support rods includes two spaced support rods 2311. The support rods 2311 are provided with vertical slide rails 23111. The sliding bearing seat 2351 is provided with a sliding groove, which cooperates with the slide rails 23111. The driven wheel 234 is rotatably supported on the sliding bearing seat 2351 through a bearing 2341.

[0059] There are two guide rollers 22 arranged side by side. Each guide roller 22 has a limiting wheel 221, and a channel is formed between adjacent limiting wheels 221 to limit the deviation of the material belt.

[0060] Feeding device 2 working process:

[0061] The coil containing the metal strip (such as aluminum strip) is mounted onto the coil holder 321.

[0062] Based on the thickness of the strip to be processed, the roller gap between the driving roller 233 and the driven roller 234 is adjusted by the driven roller fine-tuning device. During operation, the cylinder 2352 is activated, and its piston rod pushes the sliding bearing seat 2351 to slide up and down along the slide rail 23111 on the support rod 2311 of the frame 231, thereby precisely adjusting the position of the driven roller 234 to form a suitable gap between it and the driving roller 233 for clamping the strip of the current thickness.

[0063] The end of the material roll is passed sequentially through two guide rollers 22. The limiting wheels 221 on the guide rollers 22 form a channel that restricts the lateral movement of the material roll, effectively preventing the material roll from deviating during conveying. The end of the material roll is then guided to the active feeding mechanism 23 and fed into the roller gap formed between the active roller 233 and the driven roller 234.

[0064] The motor 232 is started, and its power is transmitted to the drive wheel 233 via the transmission mechanism 2331 (belt drive mechanism or gear chain drive mechanism), driving it to rotate. The drive wheel 233 and the driven wheel 234 together clamp the material belt. Under the action of friction, the rotating drive wheel 233 and the driven wheel 234 work together to provide a stable and reliable traction force for the material belt, smoothly pulling the material belt out from the upstream coil.

[0065] Reference Figures 5-7 The heat dissipation strip height adjustment device 3 includes: a base 31, a pressing adjustment device, a controller (not shown in the figure), and a pneumatic control circuit.

[0066] The pressing adjustment device includes a bracket 321, a cylinder 322, and a pressing block 323. The bracket 321 is located above the base 31. The cylinder 322 is mounted on the bracket 321 with its piston rod vertically downward. The pressing block 323 is connected to the end of the piston rod. The bracket 321 has a vertically arranged guide rod 324. The pressing block 323 slides with the guide rod 324 through a sliding sleeve 325. The pressing block 323 is a block-shaped structure with a flat pressing surface at the bottom.

[0067] The base 31 is provided with a support plate 311 that is vertically opposite to the pressing block 323, and the top of the support plate 311 has a flat support surface.

[0068] The pressing block 323 and the support plate 311 are made of elastic non-metallic material, or have an elastic non-metallic layer attached to their surfaces in contact with the metal strip. The elastic non-metallic material may be polyurethane rubber to increase friction and protect the surface of the metal strip.

[0069] The pneumatic control circuit includes a solenoid valve 331 and an electro-proportional valve 332. The solenoid valve 331 is connected to the cylinder 322 and is used to control the on and off of the cylinder 322. The electro-proportional valve 332 is connected to the cylinder 322 and is used to adjust the air supply pressure of the cylinder 322. The controller is connected to the solenoid valve 331 and the electro-proportional valve 332 respectively. The controller drives the pressing block 323 to perform the pressing action by controlling the pneumatic control circuit.

[0070] The pressing and adjusting device is equipped with conveyor wheel assemblies 34 on both the front and rear sides along the conveying direction of the metal strip.

[0071] The heat dissipation strip height adjustment device 3 is located between the feeding device 2 and the roll forming mechanism 4. It is used to apply a precisely controllable pre-compression force to the unformed straight metal strip (aluminum strip). By adjusting the initial stress state before it enters the roll forming mechanism 4, the device indirectly and stably controls the peak height of the final formed heat dissipation strip. If the metal strip is compressed too tightly, the peak height of the heat dissipation strip formed by the corrugated forming tool will be lower; conversely, if it is compressed too loosely, the peak height of the formed heat dissipation strip will be higher.

[0072] After the operator sets the target fin peak height through the controller, the controller pre-stores or calculates the required pre-clamping force corresponding to the height value in real time through an algorithm, and then converts it into a control signal for the electro-proportional valve 332, precisely adjusts the air supply pressure of the cylinder 322, and then applies the required pre-clamping force to the metal strip through the pressing block 323, so as to achieve automatic and stable control of the heat dissipation fin forming height.

[0073] Reference Figures 8-12 The roll forming mechanism includes forming blades and an online cleaning device for forming blades. The forming blades include an upper forming blade and a lower forming blade arranged opposite each other. The upper forming blade and the lower forming blade are existing technologies and will not be described in detail in this application.

[0074] The online cleaning device for forming blades includes:

[0075] A cleaning oil supply unit is used to spray cleaning oil onto the upper forming blade 41 and the lower forming blade 42. The cleaning oil supply unit includes an oil tank, an upper nozzle 433, and a lower nozzle 434. The upper nozzle 433 and the lower nozzle 434 are respectively located on the left side of the upper forming blade 41 and the left side of the lower forming blade 42, with their nozzles facing the working surfaces of the upper forming blade 41 and the lower forming blade 42, respectively. There are two oil tanks: an upper oil tank 431 and a lower oil tank 432. The upper nozzle 433 is connected to the upper oil tank 431 via a pipeline, and the lower nozzle 434 is connected to the lower oil tank 432 via a pipeline.

[0076] During operation, the cleaning oil in the upper and lower oil tanks 432 is continuously or intermittently sprayed onto the surfaces of the upper and lower forming blades 42 through the upper nozzle 433 and the lower nozzle 434, respectively, to wash away the aluminum powder and sludge that have just been generated.

[0077] An airflow purging unit is used to purge gas from the upward forming blade 41 and the lower forming blade 42; the airflow purging unit includes an upper air nozzle 441 and a lower air nozzle 442. The upper air nozzle 441 and the lower air nozzle 442 are connected to an external compressed air source via pipelines.

[0078] The upper air nozzle 441 is located on the right side of the upper forming blade 41, opposite to the upper nozzle 433 on the left side. (Refer to reference...) Figure 5 In this embodiment, the two rows of spaced second air outlets 4411 on the upper air nozzle 441 can form a uniform air curtain to blow away the surface of the upper forming blade 41.

[0079] The lower air nozzle 442 is located on the right side of the lower forming blade 42, opposite to the lower nozzle 434 on the left side. (Refer to reference...) Figure 4The lower air nozzle 442 is a box-shaped structure with adjacent inclined surfaces 4421 and vertical surfaces 4422, with the inclined surface 4421 close to the lower forming blade 42. A row of first air outlet holes 4423 is formed on both the inclined surface 4421 and the vertical surface 4422. This unique design allows gas to be blown onto the lower forming blade 42 simultaneously from both the inclined and vertical directions, which is particularly effective for complex grooved areas prone to powder accumulation.

[0080] The oil mist recovery unit is used to collect and filter oil mist, metal powder, and sludge generated during the cleaning process. The oil mist recovery unit includes an upper oil mist inlet 451, a lower oil mist inlet 452, and a filter. The upper oil mist inlet 451 is located next to the upper air nozzle 441 (downstream of the airflow in the direction of rotation of the upper forming blade 41), and the lower oil mist inlet 452 is located next to the lower air nozzle 442 (downstream of the airflow in the direction of rotation of the lower forming blade 42). The upper oil mist inlet 451 and the lower oil mist inlet 452 are connected to the filter.

[0081] The upper nozzle 433 and the upper air nozzle 441 are arranged opposite to the upper forming blade 41, and the lower nozzle 434 and the lower air nozzle 442 are arranged opposite to the lower forming blade 42, so that the cleaning oil and gas can act crosswise or oppositely on the surface of the forming blade, and a negative pressure zone is formed by the upper oil mist inlet 451 and the lower oil mist inlet 452 to collect oil mist, aluminum powder and oil sludge.

[0082] There are two filters: an upper filter 453 and a lower filter 454. The upper filter 453 is connected to the upper oil mist inlet 451, and the lower filter 454 is connected to the lower oil mist inlet 452. The oil outlet of the upper filter 453 is connected to the upper oil tank 431, and the oil outlet of the lower filter 454 is connected to the lower oil tank 432.

[0083] The oil-aluminum powder mixture from the upper oil mist inlet 451 and the lower oil mist inlet 452 enters the upper filter 453 and the lower filter 454, respectively. In this embodiment, both the upper filter 453 and the lower filter 454 are vacuum filter separators with filter screens. The oil-aluminum powder mixture enters the upper filter 453 and the lower filter 454, where it is separated by the filter screens. The aluminum powder is trapped on the outer surface of the filter screens, and the clean oil flows out and returns to the corresponding oil tank for recycling.

[0084] The two recycling units operate independently. When the oil in one unit (such as the lower unit where there is severe powder accumulation due to the lower forming blade 42) becomes contaminated quickly, it will not affect the normal operation of the other unit, making maintenance more convenient. At the same time, the oil level and quality in the upper oil tank 431 and the lower oil tank 432 can be observed independently, enabling more precise maintenance and management.

[0085] Reference Figures 13-18 The cutting device includes a feeding channel 51, a screw feeding mechanism, and a cutting mechanism, all mounted on the frame 1.

[0086] The feeding channel 51 is used to guide the elongated strip of formed fin material (hereinafter referred to as "material strip") along a predetermined path. The feeding channel 51 can be a guiding structure consisting of a pair of opposing guide plates.

[0087] Below the feeding channel 51, a screw feeding mechanism is provided. The screw feeding mechanism includes a connected screw conveyor 521 and a screw drive assembly, which drives the screw conveyor 521 to rotate to convey materials.

[0088] The screw conveyor 521 extends along the conveying direction of the material belt. The screw drive assembly includes a first motor 522 and a pulley assembly 523 that is connected to the output shaft of the first motor 522 and the screw conveyor 521. After the first motor 522 starts, it drives the screw conveyor 521 to rotate at a constant speed through the pulley assembly 523. When the screw conveyor 521 rotates, its spiral groove contacts the lower surface of the material belt, and the friction force propels the material belt to be continuously and smoothly conveyed along the feeding channel 51 towards the cutting mechanism.

[0089] The screw feeder is equipped with a cutting mechanism on the discharge side, which is used to cut the continuously conveyed material strip into fin units of a predetermined length.

[0090] The cutting mechanism includes a bracket 531, a blade holder 532 that can be slidably mounted on the bracket 531, a cutter 533 mounted on the blade holder 532, and a drive device for driving the blade holder 532 to reciprocate.

[0091] The driving device includes a second motor 541, a drive wheel 542 driven by the second motor 541, an eccentric wheel 543 that rotates synchronously with the drive wheel 542, and a linkage wheel 544 disposed on the eccentric shaft of the eccentric wheel 543; a slider 545 is provided on the back of the tool holder 532, and a guide rail 546 that slides with the slider 545 is provided on the bracket 531; the tool holder 532 is connected to the linkage wheel 544, so that the rotational motion of the eccentric wheel 543 is converted into the up-down linear motion of the tool holder 532.

[0092] When the second motor 541 is working, it drives the drive wheel 542 and the eccentric wheel 543 to rotate synchronously. The rotational motion of the eccentric wheel 543 is converted into reciprocating oscillation through the linkage wheel 544, which in turn drives the tool holder 532 to make precise up-and-down linear reciprocating motion along the guide rail 546.

[0093] The cutter 533 includes a connected blade 5331 and a cutting edge 5332. The transition section connecting the blade 5331 and the cutting edge 5332 is configured to match the shape of the crest of the corrugations of the formed fin. The purpose of this design is that, during upward cutting, the transition section can first contact and conform to the crest of the corrugations of the strip, providing good support and positioning for the strip, and then the sharp cutting edge 5332 completes the cutting. This effectively prevents the strip (especially at the crest) from being crushed, deformed, or displaced during cutting, ensuring a neat and high-quality cut surface.

[0094] The cutter 533 is inclined, and its inclination direction matches the inclination direction of the material conveyed by the screw conveyor 521. When the screw conveyor 521 pushes the material belt, it causes the material belt to present a certain inclination angle (related to the helix angle, etc.). Setting the cutter 533 to be inclined in the same direction allows the cutting surface of the cutter 533 to better adapt to and meet the inclined material belt, achieving a cut that is perpendicular or nearly perpendicular to the plane of the material belt, thereby obtaining a better cutting effect and reducing burrs and deformation.

[0095] The cutter 533 is detachably connected to the tool holder 532. The cutter 533 is detachably connected to the tool holder 532 via fasteners such as bolts 5321. This design allows for quick and individual replacement of the cutter 533 after it wears out, reducing maintenance costs and time.

[0096] The cutting mechanism also includes a guide block 534, which is disposed on the side corresponding to the upward endpoint of the cutter 533. The guide block 534 has a through hole 5341 for the finned material strip to pass through. The shape of the guide block 534 adjacent to the cutter 533 is adapted to the cutter 533, especially the inclined blade surface and the shape of the transition section. When the cutter 533 cuts upward, its side can slide closely against the adapting surface of the guide block 534, which can further stabilize the movement trajectory of the cutter 533 and prevent shaking.

[0097] One end of the bracket 531 is hinged to the frame 1 via a pivot, and the other end is releasably locked to the frame 1 via a locking element 5322. This allows the entire cutting mechanism to rotate within a certain angle around the pivot. The other end of the bracket 531 is releasably locked to the frame 1 via a locking element 5322 (e.g., bolt, quick-release handle, etc.). When it is necessary to clean the area under the cutter 533 or replace the cutter 533, the cutting mechanism can be removed by loosening the locking element 5322, making operation very convenient.

[0098] During operation, the formed continuous finned material strip is fed into the feeding channel 51. The first motor 522 drives the screw conveyor 521 to rotate, continuously conveying the material strip forward. The material strip passes through the through hole 5341 of the guide block 534 in sequence and reaches the predetermined cutting position above the cutter 533.

[0099] When cutting is required, the control system (not shown in the figure) starts the second motor 541 according to the set length signal or synchronization signal. The second motor 541 drives the cutter holder 532 and the cutter 533 mounted on it to move rapidly upward along the guide rail 546 through the eccentric wheel 543-linkage wheel 544 mechanism. The inclined cutter 533 first conforms to the crest of the material strip's corrugations with its specially shaped transition section, and then the blade 5332 cuts the material strip. After cutting, it returns to the initial position under the drive of the cutter drive device, waiting for the next cutting command. The spiral feeding mechanism continues to feed material for the next work cycle.

[0100] The above are merely preferred embodiments of the present invention, but the scope of protection of the present invention is not limited thereto. Any variations or substitutions that can be easily conceived by those skilled in the art within the scope of the technology disclosed in the present invention should be included within the scope of protection of the present invention. Therefore, the scope of protection of the present invention should be determined by the scope of the claims.

Claims

1. A fin forming machine, characterized in that: It includes a frame and a feeding device, a roll forming mechanism and a cutting device arranged sequentially on the frame along the material conveying direction; The feeding device includes a roll support and an active feeding mechanism. The active feeding mechanism is disposed adjacent to the roll support and is used to pull and convey the roll on the roll support forward. The active feeding mechanism includes a frame, a driving component, a driving wheel, and a driven wheel. The motor is disposed on the upper part of the frame. The driving component drives the driving wheel. The driven wheel is located below the driving wheel and is disposed opposite to the driving wheel. A roller gap is formed between the driven wheel and the driving wheel for clamping and conveying the material belt. The roll forming mechanism is used to roll the incoming coil to form continuous corrugated fins. The cutting device is used to cut the corrugated fins to a predetermined length.

2. The fin forming machine as described in claim 1, characterized in that: The active feeding mechanism also includes a driven wheel fine-tuning device, which includes a linear driver and a sliding bearing seat. The linear driver is located at the bottom of the frame, and the sliding bearing seat is connected to the output end of the linear driver. The frame is provided with a slide rail, and the sliding bearing seat slides in cooperation with the slide rail. The driven wheel is rotatably supported on the sliding bearing seat through a bearing.

3. The fin forming machine as described in claim 1, characterized in that: The feeding device also includes a guide roller, which is located between the material roll support and the active feeding mechanism.

4. The fin forming machine as described in claim 1, characterized in that: The roll forming mechanism includes a forming blade and an online cleaning device for the forming blade; The forming blade includes an upper forming blade and a lower forming blade arranged opposite to each other, and the online cleaning device for the forming blade includes: A cleaning oil supply unit is used to spray cleaning oil onto the upper forming blade and the lower forming blade. The cleaning oil supply unit includes an oil tank, an upper nozzle, and a lower nozzle. The upper nozzle and the lower nozzle are respectively located on one side of the upper forming blade and the other side of the lower forming blade, and the upper nozzle and the lower nozzle are connected to the oil tank. An airflow purging unit is used to purge gas onto the upper forming blade and the lower forming blade. The airflow purging unit includes an upper air nozzle located on the other side of the upper forming blade and a lower air nozzle located on the other side of the lower forming blade. An oil mist recovery unit is used to collect and filter oil mist, metal powder, and sludge generated during the cleaning process. The oil mist recovery unit includes an upper oil mist inlet, a lower oil mist inlet, and a filter. The upper oil mist inlet is located next to the upper air nozzle, and the lower oil mist inlet is located next to the lower air nozzle. The upper and lower oil mist inlets are connected to the filter.

5. The fin forming machine as described in claim 4, characterized in that: The oil tank has two parts, an upper oil tank and a lower oil tank. The upper nozzle is connected to the upper oil tank through a pipeline, and the lower nozzle is connected to the lower oil tank through a pipeline. There are two filters, an upper filter and a lower filter. The upper filter is connected to the upper oil mist inlet, and the lower filter is connected to the lower oil mist inlet. The oil outlet of the upper filter is connected to the upper oil tank, and the oil outlet of the lower filter is connected to the lower oil tank.

6. The fin forming machine as described in claim 1, characterized in that: The cutting device includes a feeding channel, a spiral feeding mechanism, and a cutting mechanism. The spiral feeding mechanism is located below the feeding channel and includes a connected spiral conveying rod and a spiral drive assembly. The spiral drive assembly drives the spiral conveying rod to rotate to convey material. The cutting mechanism is located on the discharge side of the spiral feeding mechanism and includes a support, a blade holder that can be slidably mounted on the support, a cutter mounted on the blade holder, and a drive device for driving the blade holder to reciprocate. The cutter includes a connected blade body and a cutting edge, and the transition portion connecting the blade body and the cutting edge is configured to match the shape of the crest section of the corrugated fin.

7. The fin forming machine as described in claim 6, characterized in that: The cutter is inclined, and its inclination direction is adapted to the inclination direction of the material conveyed by the spiral conveyor.

8. The fin forming machine as described in claim 6, characterized in that: The cutting mechanism also includes a guide block, which is disposed on the side corresponding to the upper end point of the cutter. The guide block has a through hole for the finned material strip to pass through, and the shape of the guide block adjacent to the cutter is adapted to the cutter.

9. The fin forming machine as described in claim 1, characterized in that: It also includes a heat dissipation strip height adjustment device, which is located between the feeding device and the roll forming mechanism; The heat dissipation strip height adjustment device includes: Base; The pressing adjustment device includes a bracket, a cylinder, and a pressing block. The bracket is located above the base, the cylinder is mounted on the bracket and its piston rod is set vertically downward, and the pressing block is connected to the end of the piston rod. The controller and pneumatic control circuit include a solenoid valve and an electro-proportional valve. The solenoid valve is connected to the cylinder and is used to control the on / off state of the cylinder. The electro-proportional valve is connected to the cylinder and is used to adjust the air supply pressure of the cylinder. The controller is connected to the solenoid valve and the electro-proportional valve respectively. The controller drives the pressing block to perform a pressing action by controlling the pneumatic control circuit.

10. The fin forming machine as described in claim 9, characterized in that: The pressing block is a block-shaped structure with a flat pressing surface at the bottom; the base is provided with a support plate that is vertically opposite to the pressing block, and the top of the support plate has a flat support surface.

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