An inserting machine for inner fins of flat tubes of an automotive intercooler

Abstract

The present invention relates to an inner fin inserting machine for an automotive intercooler flat tube, comprising: a frame; an inner fin feeding unit disposed in the middle of the frame; an inner fin pressing unit disposed below the inner fin feeding unit for pre-pressing irregular inner fins; a flat tube storage unit disposed on one side of the inner fin feeding unit for placing flat tubes; an inner fin pushing unit disposed on the other side of the inner fin feeding unit for horizontally pushing inner fins into the lowermost flat tube located in the flat tube storage unit; and a tube pushing unit disposed at the bottom of the flat tube storage unit for horizontally pushing out the flat tubes with fins inserted. Compared with the prior art, the present invention can automatically insert fins into flat tubes and can automatically push the flat tubes with fins inserted into a flat tube collection box, saving human resources, saving a large amount of production space and greatly improving the production environment.

Description

Technical Field

[0001] The present invention relates to the field of manufacturing automotive intercooler equipment, and particularly to an inserting machine for internal fins in flat tubes of automotive intercoolers. Background Art

[0002] An intercooler is installed between the outlet of the compressor and the inlet of the engine in an automobile to reduce the temperature and increase the density of the pressurized air, thereby increasing the circulating intake air volume of the engine. By setting up an intercooler, the engine power can be significantly increased, its economy can be improved, and pollutants can be reduced under the premise that the heat load does not increase or even decreases and the mechanical load increases little. The air-cooled intercooler is a common form of intercooler, and it uses ambient air to cool the high-temperature pressurized air. Since the heat transfer media on both the hot side and the cold side are air and the convective heat transfer coefficients on both sides are in the same order of magnitude, the heat transfer areas on both sides are approximately the same, so several forms such as flat tube type, plate fin type, and tube fin type are adopted. The flat tube type intercooler installs fins inside the flat tubes to increase the heat transfer area.

[0003] Currently, the internal fins in the flat tubes of the automotive intercooler core are inserted manually, which has the following disadvantages:

[0004] 1. Large labor consumption, low production efficiency, and high labor cost.

[0005] 2. High labor intensity for workers. When manually inserting internal fins for a long time, the arms are prone to soreness and fatigue, and the internal fins are likely to scratch the fingers.

[0006] 3. Since the flat tubes are inserted manually, the internal fins need to be pre-prepared and a large number of turnover boxes are required for storage, and the storage occupies a large amount of production land, which is uneconomical.

[0007] 4. The insertion of internal fins cannot be automated, and the automation degree of the equipment is low. Summary of the Invention

[0008] The purpose of the present invention is to overcome the above-mentioned defects existing in the prior art and provide an inserting machine for internal fins in flat tubes of automotive intercoolers with high automation degree.

[0009] The purpose of the present invention can be achieved through the following technical solutions: An inserting machine for internal fins in flat tubes of automotive intercoolers includes:

[0010] Frame:

[0011] Internal fin feeding unit: arranged in the middle of the frame;

[0012] Internal fin pressing unit: arranged below the internal fin feeding unit for pre-pressing irregular internal fins;

[0013] Flat tube storage unit: arranged on one side of the internal fin feeding unit for placing flat tubes;

[0014] Inner fin pushing unit: arranged on the other side of the inner fin feeding unit for horizontally pushing the inner fins into the flat tube at the lowermost end in the flat tube storage unit;

[0015] Pushing tube unit: arranged at the bottom of the flat tube storage unit for horizontally pushing out the flat tubes after the insertion is completed.

[0016] With the above structure, the inner fins enter the device from the inner fin feeding unit. After being regularized by the inner fin pressing unit, they are pushed into the flat tube by the inner fin pushing unit. Then, the installed flat tubes are pushed out of the device by the pushing tube unit, and the flat tube storage unit automatically replenishes the next flat tube to be installed. By repeating this process, the automatic installation of the inner fins in the flat tubes can be achieved, with high efficiency and good installation quality.

[0017] Furthermore, the inner fin feeding unit includes an obliquely arranged inner fin sliding hopper and an adjusting rod arranged in the middle of the inner fin sliding hopper for adjusting the height of the inner fin sliding hopper. The upper end of the inner fin sliding hopper is docked with the outlet of the inner fin rolling machine, and the lower end of the inner fin sliding hopper is connected with a receiving panel. A stop iron is arranged on one side of the receiving panel relative to the inner fin sliding hopper. Due to the different models of the inner fins, the height of the outlet of the inner fin rolling machine will be slightly different. The height of the inner fin sliding hopper is finely adjusted by the adjusting rod to make the feeding of the inner fins more stable; the stop iron is set to ensure that the inner fins fall on the receiving panel. The inner fin sliding hopper is provided with fin width adjusting plates with adjustable spacing on both sides, so as to realize the adjustment of the outlet of fins with different specifications and widths.

[0018] Furthermore, the inner fin pressing unit includes a pressing cylinder arranged above the receiving panel for pre-shaping irregular inner fins and a pre-pressing block arranged on the receiving panel near the flat tube storage unit for causing elastic compression deformation at the front end of the inner fins. The pressing cylinder is set to pre-shape and pre-press irregular inner fins to make the fins reach a regular state; the pre-pressing block is set to make the front end of the regularized inner fins undergo elastic compression deformation in the width and height directions, so that the inner fins can enter the flat tube more smoothly.

[0019] A pressing plate is arranged at the bottom of the pressing cylinder, and a correction groove matching the pressing plate is arranged on the receiving panel. The size and shape of the correction groove are the same as those of the regular inner fins; a gradually decreasing channel is arranged in the pre-pressing block. The size and shape of the larger-diameter end of the channel are matched with the corrected inner fins, and the smaller-diameter end is communicated with the inside of the flat tube. The distance by which both ends of the pre-pressing block are reduced is within the elastic deformation range of the inner fin material.

[0020] Furthermore, the inner fin propulsion unit includes a main propulsion cylinder fixing plate disposed on the frame, a main propulsion cylinder horizontally fixed on the main propulsion cylinder fixing plate, and a pushing sub-unit connected to the front end of the main propulsion cylinder. During operation, the main propulsion cylinder extends, and the inner fin is pushed into the flat tube from the receiving panel through the pushing sub-unit.

[0021] The pushing sub-unit includes two parallel guide rails disposed on the main propulsion cylinder fixing plate, a slider slidably connected to the guide rails, a fin pushing plate disposed in the middle of the slider for pushing the inner fin into the flat tube, and a guiding block disposed in the front of the fin pushing plate for defining the position of the fin pushing plate. By setting the guiding block, it can ensure that the forward movement of the fin pushing plate is along a specific trajectory, so that the inner fin can be accurately inserted into the flat tube.

[0022] The inner fin propulsion unit is provided with a support for adjusting the position of the main propulsion cylinder fixing plate and a locking block for fixing the support. The support is disposed between the main propulsion cylinder fixing plate and the frame. The movement direction of the support is perpendicular to the direction in which the main propulsion cylinder extends. The bottom of the main propulsion cylinder fixing plate is provided with a propulsion shaft connected to the moving support and perpendicular to the guide rails. The fin pushing plate moves on the propulsion shaft through the main propulsion cylinder fixing plate, and different fin width propulsion adjustments are achieved through the locking block. Since the models of the flat tube and the inner fin are different, the position of the inner fin propulsion unit needs to be adjusted. Otherwise, even if the fin pushing plate moves along the trajectory defined by the guiding block, the inner fin cannot be inserted into the flat tube. At this time, the position of the main propulsion cylinder fixing plate can be finely adjusted through the support, so that the entire inner fin propulsion unit is position-adjusted, thereby ensuring that when the main propulsion cylinder extends, the inner fin can be accurately inserted into the flat tube.

[0023] The flat tube storage unit includes a vertical wall plate, a panel vertically disposed at the lower part of the wall plate for supporting the flat tube, and a fixed end plate and a movable end plate disposed on the wall plate. The widths of the fixed end plate and the movable end plate match the width of the flat tube. The fixed end plate is fixedly connected to the wall plate, and an opening for passing the flat tube is provided at the connection between the fixed end plate and the panel. The movable end plate is slidably connected to the wall plate, and the sliding direction is the same as the length direction of the flat tube. During operation, the bottommost flat tube abuts against the movable end plate, the bottom end of the fixed end plate, the bottom end of the wall plate, and the panel. The upper multi-layer flat tubes are fixed by pressing the bottommost flat tube under their own weight, so that the bottommost flat tube does not deviate. There is an opening at the connection between the fixed end plate and the wall plate, and this opening is the entrance for the fin to enter the bottommost flat tube. The remaining flat tubes are supported between the wall plate, the movable end plate, and the fixed end plate and press on the bottommost flat tube. Such a setting, firstly, ensures that after the lower flat tube is inserted and pushed out, the upper flat tube automatically falls to the bottom layer to be inserted under its own weight. Secondly, only the bottommost flat tube is in the working position, and the remaining flat tubes are all in the storage position.

[0024] The described push tube unit includes a push tube cylinder fixing plate arranged on the frame, two push tube cylinders horizontally arranged on the push tube cylinder fixing plate, and a push tube plate arranged at the top end of the push tube cylinder. The elongation direction of the push tube cylinder is perpendicular to the length direction of the flat tube, and the height of the push tube plate matches that of the bottommost flat tube. Two push tube cylinders are provided to push both ends of the flat tube respectively, so as to ensure that the inserted flat tube will not be pushed crooked.

[0025] The described fin inserting machine includes a PLC controller for controlling the working sequence of the inner fin feeding unit, the inner fin pressing unit, the inner fin pushing unit and the push tube unit.

[0026] The working sequence of the fin inserting machine of the present invention is as follows:

[0027] (1) Manual mode

[0028] Purpose: Verify whether the inner fin inserting process can be smoothly realized through manual debugging, and adjust the positions of the inner fin feeding unit, the inner fin pressing unit, the inner fin pushing unit and the push tube unit, so as to lay a foundation for realizing the automatic inserting sequence. The specific sequence is as follows:

[0029] 1: Incoming material (inner fins): The fins from the outlet of the inner fin rolling machine are sent to the channel surrounded by the stop iron and the receiving panel through the sliding hopper, and the height of the inner fin sliding hopper is adjusted;

[0030] 2: Pressing cylinder advances: Start the pressing cylinder, press the fins at the receiving panel through the support arm, so as to make the outer shape of the fins regular;

[0031] 3: Main pushing cylinder advances: Start the main pushing cylinder button, the main pushing cylinder drives the fin pushing plate, and pushes the inner fins into the pre-pressing block through the guide block along the slide rail for pre-pressing (compressive deformation), and then into the flat tube under the wall panel, completing the insertion work of the inner fins. At this time, the position of the inner fin pushing unit needs to be adjusted so that the inner fins can be easily inserted into the flat tube;

[0032] 4: Pressing cylinder retreats: Loosen the pressing cylinder button, and the pressing cylinder retreats to the initial position;

[0033] 5: Main pushing cylinder retreats: Loosen the main pushing cylinder button, and the main pushing cylinder retreats to the initial position;

[0034] 6: Push tube cylinder advances: Start the push tube cylinder button, the push tube cylinder drives the push tube cylinder connecting seat, and the push tube plate pushes the flat tube with inserted inner fins in the wall panel towards the collection box along the slide rail direction;

[0035] 7: Push tube cylinder retreats: Loosen the push tube cylinder button, and the push tube cylinder retreats to the initial position.

[0036] Two automatic modes: In the automatic mode, through the PLC controller, the automatic insertion of the inner fins can be achieved, and the automatic ejection of the flat tubes can be realized during the insertion, and the next cycle can start until the stop button is pressed to stop the PLC. In the automatic mode, an optoelectronic detection switch is also installed in the inner fin feeding unit. When the inner fins come out from the outlet of the inner fin rolling machine, the optoelectronic detection switch will send a signal to the PLC controller, and then the PLC controller controls each subsequent unit to complete the work in sequence. Through the PLC controller, the insertion of the inner fins in different process modes can be achieved, as follows:

[0037] (1) Single cycle (single fin insertion) sequence is as follows:

[0038] 1: Incoming material

[0039] 2: Compression cylinder extends

[0040] 3: Main push cylinder extends

[0041] 4: Compression cylinder retracts

[0042] 5: Main push cylinder retracts

[0043] 6: Tube pushing cylinder extends

[0044] 7: Tube pushing cylinder retracts

[0045] 8: Next cycle starts

[0046] (2) Double cycle (two fins insertion) sequence is as follows:

[0047] 1: Incoming material

[0048] 2: Compression cylinder extends

[0049] 3: Main push cylinder extends

[0050] 4: Compression cylinder retracts

[0051] 5: Main push cylinder retracts

[0052] 6: Incoming material

[0053] 7: Compression cylinder extends

[0054] 8: Main push cylinder extends

[0055] 9: Compression cylinder retracts

[0056] 10: Main push cylinder retracts

[0057] 11: Tube pushing cylinder extends

[0058] 12: Tube pushing cylinder retracts

[0059] 13: Next cycle starts

[0060] (3) Three - cycle (inserting three fins) sequence is as follows:

[0061] 1: Incoming material enters

[0062] 2: Pressing cylinder advances

[0063] 3: Main - pushing cylinder advances

[0064] 4: Pressing cylinder retreats

[0065] 5: Main - pushing cylinder retreats

[0066] 6: Incoming material enters

[0067] 7: Pressing cylinder advances

[0068] 8: Main - pushing cylinder advances

[0069] 9: Pressing cylinder retreats

[0070] 10 Main - pushing cylinder retreats

[0071] 11: Incoming material enters

[0072] 12 Pressing cylinder advances

[0073] 13: Main - pushing cylinder advances

[0074] 14: Pressing cylinder retreats

[0075] 15: Main - pushing cylinder retreats

[0076] 16: Pushing tube cylinder advances

[0077] 17: Pushing tube cylinder retreats

[0078] 18: Next cycle starts

[0079] Compared with the prior art, the beneficial effects of the present invention are reflected in the following aspects:

[0080] (1) This inner - fin inserting machine can realize automatic insertion of fins into flat tubes, and can also realize automatic pushing of the flat tubes with inserted fins into the flat - tube collection box;

[0081] (2) After manually adjusting the positions of each unit, the inserting machine can be controlled by the PLC controller to automatically implement the inserting processes of single - cycle, double - cycle and three - cycle, with a high degree of automation;

[0082] (3) This machine realizes continuous operation of three different devices. The operator can simultaneously perform the online operations of inner - fin rolling, inserting inner fins into flat tubes, and flattening flat tubes, reducing labor costs. Practice has proved that originally five people were needed for the work, and after using this machine, the number of people has been reduced by 2, saving 120,000 yuan in labor costs annually;

[0083] (4) The automatic fin inserting operation is achieved on this machine, so it can be connected to a fin rolling machine and a flat tube flattening machine to operate continuously with single-person management, saving human resources, a large amount of production space, and greatly improving the production environment.

[0084] (5) Since the automatic insertion of internal fins into the flat tube is achieved, the labor intensity of workers is greatly reduced. BRIEF DESCRIPTION OF THE DRAWINGS

[0085] Figure 1 It is a front view structural schematic diagram of the inserting machine of the present invention;

[0086] Figure 2 It is a side view structural schematic diagram of the inserting machine of the present invention;

[0087] Figure 3 It is a top view structural schematic diagram of the inserting machine of the present invention;

[0088] Figure 4 It is the front view and top view of the flat tube storage unit of the present invention.

[0089] Among them, 1 is the frame, 2 is the internal fin feeding unit, 21 is the internal fin sliding hopper, 22 is the adjusting rod, 23 is the receiving panel, 24 is the stop iron, 3 is the internal fin pressing unit, 31 is the pressing cylinder, 32 is the pre-pressing block, 4 is the flat tube storage unit, 41 is the wall plate, 42 is the panel, 43 is the movable end plate, 44 is the fixed end plate, 5 is the internal fin pushing unit, 51 is the main push cylinder fixing plate, 52 is the main push cylinder, 53 is the guide rail, 54 is the slider, 55 is the pushing shaft, 56 is the fin pushing block, 57 is the guiding block, 58 is the support, 59 is the locking block, 6 is the pushing tube unit, 61 is the pushing tube cylinder fixing plate, 62 is the pushing tube cylinder, 63 is the pushing tube plate, 7 is the PLC controller, 8 is the outlet of the internal fin rolling machine, and 9 is the flat tube collection box. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0090] The embodiments of the present invention will be described in detail below. The following embodiments are implemented on the premise of the technical solution of the present invention, and detailed implementation manners and specific operation processes are given. However, the protection scope of the present invention is not limited to the following embodiments.

[0091] Embodiment 1

[0092] A fin inserting machine for the flat tube of an automotive intercooler, the structure of which is as Figure 1 、 Figure 2 、 Figure 3 shown, including:

[0093] Frame 1:

[0094] Internal fin feeding unit 2: arranged in the middle of the frame 1;

[0095] Inner fin pressing unit 3: Set at the lower part of the inner fin feeding unit 2 for pre-pressing irregular inner fins;

[0096] Flat tube storage unit 4: Set on one side of the inner fin feeding unit 2 for placing flat tubes;

[0097] Inner fin pushing unit 5: Set on the other side of the inner fin feeding unit 2 for horizontally pushing the inner fins into the lowermost flat tube in the flat tube storage unit 4;

[0098] Pushing tube unit 6: Set at the bottom of the flat tube storage unit 4 for horizontally pushing out the flat tubes after the insertion is completed.

[0099] The inner fin feeding unit 2 includes an obliquely arranged inner fin chute 21 and an adjusting rod 22 set in the middle of the inner fin chute 21 for adjusting the height of the inner fin chute 21. The upper end of the inner fin chute 21 is docked with the outlet 8 of the inner fin rolling mill, and the lower end of the inner fin chute 21 is connected with a receiving panel 23. A stop iron 24 is provided on one side of the receiving panel 23 relative to the inner fin chute 21. Due to the different models of the inner fins, the height of the outlet 8 of the inner fin rolling mill will be slightly different. The height of the inner fin chute 21 is finely adjusted by the adjusting rod 22 to make the feeding of the inner fins more stable; by setting the stop iron 24, it can ensure that the inner fins fall on the receiving panel 23. The inner fin chute 21 is provided with fin width adjusting plates with adjustable spacing on both sides, so as to realize the adjustment of the fin discharge of different specifications and widths.

[0100] The inner fin pressing unit 3 includes a pressing cylinder 31 set above the receiving panel 23 for pre-shaping irregular inner fins and a pre-pressing block 32 set on the receiving panel 23 near the flat tube storage unit 4 for causing elastic compression deformation of the front end of the inner fins. By setting the pressing cylinder 31, the irregular inner fins can be pre-shaped and pre-pressed to make the fins reach a regular state; by setting the pre-pressing block 32, the front end of the regularized inner fins can be elastically compressed in the width and height directions, making it smoother and more convenient for the inner fins to enter the flat tubes.

[0101] The inner fin pushing unit 5 includes a main push cylinder fixing plate 51 set on the frame 1, a main push cylinder 52 horizontally fixed on the main push cylinder fixing plate 51, and a pushing sub-unit connected to the front end of the main push cylinder 52. During operation, the main push cylinder 52 extends, and the inner fins are pushed from the receiving panel 23 into the flat tubes through the pushing sub-unit.

[0102] The pushing sub-unit includes two parallel guide rails 53 provided on the main pushing cylinder fixing plate 51, a slider 54 slidably connected to the guide rails 53, a fin pushing plate 56 provided in the middle of the slider 54 for pushing the inner fins into the flat tube, and a guide block 57 provided in the front of the fin pushing plate 56 for defining the position of the fin pushing plate 56. By setting the guide block, it can ensure that the forward movement of the fin pushing plate 56 is along a specific trajectory, so that the inner fins can be accurately inserted into the flat tube.

[0103] The inner fin pushing unit is provided with a support 58 for adjusting the position of the main pushing cylinder fixing plate 51 and a locking block 59 for fixing the support 58. The support 58 is arranged between the main pushing cylinder fixing plate 51 and the frame 1. The moving direction of the support 58 is perpendicular to the elongation direction of the main pushing cylinder 52. A pushing shaft 55 connected to the support 58 and perpendicular to the guide rails 53 is provided at the bottom of the main pushing cylinder fixing plate 51. The fin pushing plate 56 moves on the pushing shaft 55 through the main pushing cylinder fixing plate 51, and different fin width pushing adjustments are achieved through the locking block 59. Since the models of the flat tube and the inner fins are different, the position of the inner fin pushing unit 5 needs to be adjusted. Otherwise, even if the fin pushing plate 56 moves along the trajectory defined by the guide block 57, the inner fins cannot be inserted into the flat tube. At this time, the position of the main pushing cylinder fixing plate 51 can be finely adjusted through the support 58, so that the entire inner fin pushing unit 5 is adjusted in position, thereby ensuring that when the main pushing cylinder 52 elongates, the inner fins can be accurately inserted into the flat tube.

[0104] The described flat tube storage unit includes a vertical wall plate 41, a panel 42 vertically provided at the lower part of the wall plate 41 for supporting the flat tube, and a fixed end plate 44 and a movable end plate 43 provided on the wall plate 41. As Figure 4 shown, the widths of the fixed end plate 44 and the movable end plate 43 match the width of the flat tube. The fixed end plate 44 is fixedly connected to the wall plate 41, and an opening for passing the flat tube is provided at the connection between the fixed end plate 44 and the panel 42. The movable end plate 43 is slidably connected to the wall plate 41, and the sliding direction is the same as the length direction of the flat tube. During operation, the bottommost flat tube is placed in the space formed by the movable end plate 43, the bottom end of the fixed end plate 44, the bottom end of the wall plate 41, and the bottom end of the panel 42. The weight of the upper multi-layer flat tubes presses the bottommost flat tube to fix it, so that the bottommost flat tube does not deviate. Such a setting, on the one hand, ensures that when reinserting, the bottommost flat tube is fixed by the heavy pressure of the movable end plate 43, the fixed end plate 44, the wall plate 41, the panel 42, and the multi-layer flat tubes; on the other hand, only the bottommost flat tube is in the working position, and the rest of the flat tubes are in the storage position. When the insertion is completed, the bottommost flat tube is pushed out by the tube pushing unit 6, and the bottommost flat tube in the storage position drops, and the process is repeated in sequence.

[0105] The pusher tube unit 6 includes a pusher tube cylinder fixing plate 61 arranged on the frame 1, two pusher tubes cylinders 62 horizontally arranged on the pusher tube cylinder fixing plate 61, and a pusher tube plate 63 arranged at the top end of the pusher tube cylinder 62. The extending direction of the pusher tube cylinder 62 is perpendicular to the length direction of the flat tube, and the height of the pusher tube plate 63 matches that of the bottommost flat tube. Two pusher tube cylinders 62 are provided to respectively push both ends of the flat tube, so as to ensure that the inserted flat tube accurately falls into the flat tube collection box 9.

[0106] The inserting machine further includes a PLC controller 7 for controlling the working sequence of the inner fin feeding unit 2, the inner fin pressing unit 3, the inner fin pushing unit 5 and the pusher tube unit 6.

Claims

1. A car intercooler flat tube inner fin insertion machine, characterized in that: The insertion machine includes: frame: Inner fin feeding unit: set in the middle of the frame; Inner fin pressing unit: It is set at the lower part of the inner fin feeding unit and is used to pre-press irregular inner fins; Flat tube storage unit: set on one side of the inner fin feeding unit for placing flat tubes; Inner fin pushing unit: provided on the other side of the inner fin feeding unit and used for pushing the inner fin horizontally into the flat tube at the lowest end of the flat tube storage unit; Tube pushing unit: It is located at the bottom of the flat tube storage unit and is used to push out the inserted flat tubes horizontally. The inner fin feeding unit includes an inner fin sliding hopper arranged obliquely and an adjusting rod arranged in the middle of the inner fin sliding hopper for adjusting the height of the inner fin sliding hopper. The upper end of the inner fin sliding hopper is connected to the outlet of the inner fin rolling mill. The lower end of the inner fin sliding hopper is connected to a material receiving panel. The material receiving panel is provided with a stop iron on the side opposite to the inner fin sliding hopper. Fin width adjustment plates with adjustable spacing are provided on both sides of the inner fin sliding hopper. The inner fin pressing unit includes a pressing cylinder arranged above the material receiving panel for pre-shaping irregular inner fins and a pre-pressing block arranged on the material receiving panel near the side of the flat tube storage unit for compressing and deforming the front end of the inner fins; A pressing plate is provided at the bottom of the pressing cylinder, and a correction groove matching the pressing plate is provided on the material receiving panel. The size and shape of the correction groove are the same as those of the regular inner fins. A gradually decreasing channel is provided in the pre-pressing block. The size and shape of the end with a larger aperture match those of the corrected inner fins, and the end with a smaller aperture is connected to the interior of the flat tube. The distance between the two ends of the pre-pressing block is within the elastic deformation of the inner fin material. The flat tube storage unit includes a vertically arranged wall plate, a panel vertically arranged below the wall plate for supporting the flat tubes, and a fixed end plate and a movable end plate arranged on the wall plate. The widths of the fixed end plate and the movable end plate match the widths of the flat tubes. The fixed end plate is fixedly connected to the wall plate, and an opening for passing the flat tubes is provided at the connection between the fixed end plate and the panel. The movable end plate is slidably connected to the wall plate, and the sliding direction is the same as the length direction of the flat tubes. The insertion machine includes a PLC controller for controlling the working sequence of the inner fin feeding unit, the inner fin pressing unit, the inner fin pushing unit and the tube pushing unit.

2. The automobile intercooler flat tube inner fin insertion machine according to claim 1, characterized in that: The inner fin propulsion unit includes a main push cylinder fixing plate arranged on the frame, a main push cylinder horizontally fixed on the main push cylinder fixing plate, and a pushing sub-unit connected to the front end of the main push cylinder. When working, the main push cylinder extends and pushes the inner fin from the material receiving panel into the flat tube through the pushing sub-unit.

3. The automobile intercooler flat tube inner fin insertion machine according to claim 2, characterized in that: The pusher unit includes two parallel guide rails arranged on the main push cylinder fixing plate, a slider slidably connected to the guide rails, a fin push plate arranged in the middle of the slider for pushing the inner fin into the flat tube, and a guide block arranged in the front of the fin push plate for limiting the position of the fin push plate.

4. The automobile intercooler flat tube inner fin insertion machine according to claim 3, characterized in that: The inner fin propulsion unit is provided with a support for adjusting the position of the main push cylinder fixing plate and a locking block for fixing the support. The support is arranged between the main push cylinder fixing plate and the frame. The movement direction of the support is perpendicular to the extension direction of the main push cylinder. The bottom of the main push cylinder fixing plate is provided with a propulsion shaft connected to the support and perpendicular to the guide rail. The fin push plate moves on the propulsion shaft through the main push cylinder fixing plate, and different fin width propulsion adjustments are achieved through the locking block.

5. The automobile intercooler flat tube inner fin insertion machine according to claim 1, characterized in that: The pushing tube unit includes a pushing tube cylinder fixing plate arranged on the frame, two pushing tube cylinders arranged horizontally on the pushing tube cylinder fixing plate, and a pushing tube plate arranged on the top of the pushing tube cylinder. The elongation direction of the pushing tube cylinder is perpendicular to the length direction of the flat tube, and the height of the pushing tube plate matches the flat tube at the bottom layer.

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