Turnover equipment for roll coating of front and back soldering paste on heat exchanger fin

Abstract

The invention discloses turnover equipment for roll coating of front and back soldering paste on a heat exchanger fin, and relates to the technical field of turnover devices. The overturning equipment for roll coating of the front and back soldering paste on the fins of the heat exchanger comprises a clamping part used for clamping the conveyed fins, and a first clamping arm and a second clamping arm are arranged in a staggered mode; the rotating part controls the clamping part to turn over by 180 degrees clockwise or anticlockwise through a rotating shaft; the buffering part is used for reducing impact force borne by the fins during overturning, and the buffering part is arranged between the rotating part and the conveying table; and the stretching part enables the second clamping arm to incline after being overturned through inertia and elasticity and is matched with the buffering part to guide the fins to slide into the conveying table along the inclined surface. According to the overturning equipment for roll coating of the front and back soldering paste on the fins of the heat exchanger, the fins are clamped through the clamping parts and overturned by 180 degrees, in the overturning process, the instantaneous impact force of the fins is reduced through the buffering parts, and the fins are guided to slide into the conveying table through the inclined planes formed by the second clamping arms and the arch-shaped annular plates.

Description

Technical Field

[0001] The present invention relates to the technical field of flipping devices, and particularly to a flipping device for roll-coating solder paste on both the front and back sides of heat exchanger fins. Background Art

[0002] During the operation of the battery pack, motor, and electronic devices of new energy vehicles, a large amount of heat is generated. Heat exchanger fins can greatly increase the heat dissipation area of the heat exchanger, accelerate the heat exchange speed, and help maintain the temperature balance of the thermal management system of new energy vehicles.

[0003] In order to pursue better heat conduction performance, heat exchanger fins are made of materials such as aluminum alloy. Although these materials have good thermal conductivity, they are relatively brittle, especially at stress concentration points such as the corners and thinning parts of the fins. Solder paste treatment is required on both the front and back sides of the heat exchanger fins. After the solder paste is applied to one side, the fins need to be rotated 180° to process the other side.

[0004] Chinese Patent Publication No.: CN108674940B, a flipping and transporting device, includes a base assembly, a flipping and transporting assembly, a feeding assembly, a belt driving assembly, and a feeding assembly. While the sheet is being flipped, it is also being transported through a missing-tooth gear, a cam, connecting rod I, connecting rod II, connecting rod III, and connecting rod IV.

[0005] If the clamping and fixing method between the carrier and the fins is unreliable, during the flipping process, due to the action of gravity and inertia, the fins may fall off from the fixing device or undergo relative displacement, which will not only affect the flipping effect but also may cause damage or loss of the fins. For example, in Patent Publication No. CN108674940B, the loading body is a U-shaped plate with one open side. The rotation speed and angle of the loading body need to be precisely controlled, otherwise there is a possibility that the material (fins) will fly out of the loading body, easily causing damage to the fins and having high requirements for the connecting components of the loading body; in order to ensure that the fins enter the loading body, the spatial area of the loading body is slightly larger than the footprint of the fins, and the fins may slide or shake and collide during the flipping process, which will also cause damage to the fins; in order to complete the transportation of the fins during the flipping process, one end of the fins directly contacts the surface of the conveying device and collides. For example, in Patent Publication No. CN108674940B, after the loading body is flipped, there is an inclined angle between the loading body and the conveying main body, and the fins cannot directly contact the conveying main body but need to fall from the loading body onto the conveying main body, and the fins are prone to being knocked. Summary of the Invention

[0006] In view of the deficiencies of the prior art, the present invention provides a flipping device for roll-coating solder paste on both the front and back sides of fins of a heat exchanger. The fins are clamped by a clamping part and flipped by 180°. During the flipping process, the instantaneous impact force of the fins is reduced by a buffer part, and the fins are guided to slide onto a transfer table through an inclined surface formed by a second clamping arm and an arcuate ring plate.

[0007] Technical solution: To achieve the above object, the present invention is realized through the following technical solutions: A flipping device for roll-coating solder paste on both the front and back sides of fins of a heat exchanger, comprising: a box body and a soldering box. A transfer table is arranged between the box body and the soldering box, including:

[0008] A clamping part for clamping the conveyed fins. The clamping part is installed at one end of the box body close to the soldering box. The clamping part includes: a first clamping arm and a second clamping arm, and the first clamping arm and the second clamping arm are arranged alternately;

[0009] A rotating part for controlling the flipping of the clamping part by 180° through a rotating shaft. The rotating part is connected to the clamping part;

[0010] A buffer part for reducing the impact force received by the fins during flipping. The buffer part is arranged between the rotating part and the transfer table;

[0011] A stretching part that makes the second clamping arm tilt after flipping through inertia and elasticity and cooperates with the buffer part to guide the fins to slide onto the transfer table along an inclined surface. One end of the stretching part is connected to the second clamping arm.

[0012] Preferably, there are two clamping parts in total, and the two clamping parts are symmetrically distributed on both sides of the rotating shaft. The clamping part further includes: a first fixing ring, which is fixedly connected to the first clamping arm. A second fixing ring is arranged on the side of the first fixing ring away from the first clamping arm, and a limiting ring is arranged on the side of the second fixing ring away from the first clamping arm. The first fixing ring, the second fixing ring, and the limiting ring are all fixedly connected to the rotating shaft. An outward expanding plate is connected to the side surface of the second fixing ring, and the side of the outward expanding plate away from the first fixing ring is connected to the second clamping arm. The first clamping arm is arranged below the second clamping arm, and a stop block is connected to the side of the second fixing ring away from the first clamping arm.

[0013] Preferably, the stretching part includes: a sector ring plate, which is adapted to the shape of the connection between the second fixed ring and the outward expanding plate. A rotating ring is connected to one side of the sector ring plate close to the rotating shaft. The rotating ring is arranged between the second fixed ring and the limiting ring and is rotatably connected to the rotating shaft. A first arc plate and a second arc plate are connected to one side of the sector ring plate close to the first clamping arm. The first arc plate is adapted to the outward expanding plate and is arranged outside the outward expanding plate. The second arc plate is adapted to the second fixed ring and is arranged outside the second fixed ring. The first arc plate is connected to the second arc plate through a vertical plate. A first connecting plate is connected to the edge of one end of the sector ring plate close to the first clamping arm. The first connecting plate is connected to a second connecting plate through a hook body spring. The second connecting plate is connected to the end of the second clamping arm on the side far from the first clamping arm. A slider is connected to the middle of one side of the sector ring plate close to the first clamping arm. A chute is formed on one side of the second fixed ring close to the sector ring plate. The slider is slidably connected to the chute. A rotating rod is arranged on the side of the sector ring plate far from the first clamping arm. One end of the rotating rod passes through the first fixed ring and the second fixed ring in sequence and is rotatably connected to the second clamping arm.

[0014] Preferably, the length of the chute is greater than the length of the slider. The axis of the chute is collinear with the axis of the rotating shaft. The first clamping arm and the second clamping arm are staggered both in the horizontal direction and the vertical direction.

[0015] Preferably, the buffering part includes: a bow-shaped arc plate, which is located between the rotating shaft and the conveying table. A moving rod is connected to the center of the bottom of the bow-shaped arc plate. Both ends of the bottom of the bow-shaped arc plate are connected to a U-shaped plate through springs. A cylinder body is connected to the top of the U-shaped plate. Both ends of the U-shaped plate are connected to the side surface of the conveying table. The bottom end of the moving rod extends into the cylinder body and is slidably connected to the inner wall of the cylinder body. A limiting block is connected to the middle of the side surface of the cylinder body through a support plate. The limiting block is adapted to the bow-shaped ring plate and is used to support the bow-shaped ring plate.

[0016] Preferably, the top of the limiting block is located above the conveying table. The limiting block is an elastic plate. The distance between the axis of the rotating shaft and the conveying table is less than the length of the fin. The distance from the top of the bow-shaped ring plate to the clamping part is two-thirds of the length of the fin. The distance from the top of the bow-shaped ring plate to one end of the conveying table is one-fourth of the length of the fin.

[0017] Preferably, when the clamping part is located in the box and does not rotate, the second clamping arm is in the starting state, and the stop block supports the second clamping arm. The top of the second clamping arm and the surface of the conveyor belt are in the same plane. When the clamping part is flipped 180°, the second clamping arm is in the state after rotation. When the second clamping arm continues to rotate and the included angle with the horizontal plane is 10-15°, the second clamping arm is in the terminating state. The fin slides down along the second clamping arm and the top of the bow-shaped ring plate to the conveying table, and the slider slides from one end of the chute to the other end.

[0018] Preferably, a conveyor belt is arranged inside the box body. The conveyor belt is used to convey the fins to the clamping part. The clamping length of the clamping part is two-sevenths to three-sevenths of the length of the fins. The rotating part of the rotating shaft is connected to the bidirectional motor. The conveying table is used to convey the fins into the soldering box.

[0019] Beneficial effects: The present invention provides a turnover device for roll-coating solder paste on the front and back sides of heat exchanger fins. Compared with the prior art, it has the following beneficial effects: 1. The fins are clamped and turned over by 180° by the clamping part. The first clamping arm and the second clamping arm are arranged in an alternating manner (horizontal direction and vertical direction), increasing the contact area between the clamping part and the fins, increasing the torsional resistance, and making it difficult for the fins to fall off. During the turnover process, the instantaneous impact force of the fins is reduced by the buffer part, and the inclined surface formed by the second clamping arm and the top of the buffer part guides the fins to slide onto the conveying table.

[0020] 2. The distance from the top of the arcuate ring plate to the clamping part is two-thirds of the length of the fins. The top of the limiting block is located above the conveying table, ensuring that one end of the fin cannot directly contact the conveying table immediately during the turnover process, but needs to first contact the top of the arcuate ring plate. The buffer part buffers the instantaneous impact force generated by the rapid turnover of the fins, reducing the damage to the fins and the clamping part. However, in order to ensure that the fins after buffering can quickly and easily slide from the clamping part to the conveying table, one end of the fin needs to slide down to the conveying table by means of the inclined surface and accelerate the extraction of the fin from the clamping part by means of the friction of the conveying table. Therefore, after turnover, one end of the fin cannot be too far from the conveying table. Therefore, the distance from the top of the arcuate ring plate to one end of the conveying table can be set to one-fourth of the length of the fins.

[0021] 3. When the clamping part is located inside the box body and does not rotate, the second clamping arm is in the starting state, and the stop block supports the second clamping arm. The stop block can prevent one end of the second clamping arm from rotating downward under the action of gravity, and can also prevent the second clamping arm from rotating back to the original position after turnover. By blocking the second clamping arm with the stop block, it is possible to prevent the clamping arm from crossing the stop block under the action of inertia and gravity, thereby restricting the clamping gap between the second clamping arm and the first clamping arm and avoiding too large a clamping gap to ensure the stability of clamping. The top of the second clamping arm is on the same plane as the surface of the conveyor belt. When the clamping part is turned over by 180°, the second clamping arm is in the turned state. When the second clamping arm continues to rotate and the included angle with the horizontal plane is 10 - 15°, the second clamping arm is in the termination state. The fins slide down to the conveying table along the second clamping arm and the top of the arcuate ring plate, and the slider slides from one end of the chute to the other end.

[0022] 4. The arcuate ring plate is a parabola with an opening downward. The extrusion area between the top of the arcuate ring plate and the fins is small, and the arcuate ring plate is composed of two arc-shaped plates, which is convenient for fitting with the fins and guiding the fins to slide.

[0023] 5. By changing the height of the bow-shaped ring plate through collision and different gravity actions, it is convenient for the bow-shaped ring plate and the inclined second clamping arm to form a sliding slope, which is also convenient for alleviating the instantaneous impact force of the fin, and is also convenient for depressing the bow-shaped ring plate when the fin is not supported by the second clamping arm, reducing the height between the bow-shaped ring plate and the transfer table, and the impact force when one end of the fin falls on the transfer table is small. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] The drawings incorporated herein and constituting a part of the specification illustrate embodiments of the present application, and together with the specification are further used to explain the principles of the present application and enable those skilled in the relevant art to implement and use the present application.

[0025] In order to more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the following will briefly introduce the drawings required for use in the description of the embodiments or the prior art. Obviously, the drawings in the following description are only some embodiments of the present invention. For those of ordinary skill in the art, without creative efforts, other drawings can be obtained based on these drawings.

[0026] Figure 1 It is a schematic structural diagram of the present invention.

[0027] Figure 2 It is a schematic structural diagram of the part where the box body is located.

[0028] Figure 3 It is a top view cross-sectional view of the part where the box body is located.

[0029] Figure 4 It is a schematic structural diagram of the conveyor belt, rotating shaft, second fixing ring, and limiting ring.

[0030] Figure 5 It is a schematic structural diagram of the limiting ring, second clamping arm, second arc plate, and hook body spring.

[0031] Figure 6 It is a schematic structural diagram of the part where the first clamping arm and the second clamping arm are located.

[0032] Figure 7 For Figure 6 exploded view.

[0033] Figure 8 For Figure 7 the exploded view of the part where the second fixing ring and the second clamping arm are located in

[0034] Figure 9 It is a schematic structural diagram of the part where the second clamping arm is located.

[0035] Figure 10 It is a schematic structural diagram of the part where the bow-shaped ring plate, limiting block, spring, and U-shaped plate are located.

[0036] Figure 11 The Figure 10 exploded view after removing the U-shaped plate.

[0037] Figure 12 It is a schematic structural diagram of the second clamping arm and the bow-shaped ring plate after rotating 180° to clamp the fin.

[0038] Figure 13 It is a schematic structural diagram of the fin sliding down along the second clamping arm and the bow-shaped ring plate after the second clamping arm rotates downward.

[0039] The reference numerals in the figure are: 1, box body; 2, transfer table; 3, welding box; 41, first clamping arm; 42, first fixing ring; 43, rotating rod; 44, second fixing ring; 45, limiting ring; 46, second clamping arm; 47, outward expanding plate; 48, stop block; 51, sliding groove; 52, slider; 53, sector ring plate; 54, first arc plate; 55, second arc plate; 56, rotating ring; 57, first connecting plate; 58, hook body spring; 59, second connecting plate; 61, bow-shaped ring plate; 62, moving rod; 63, cylinder body; 64, spring; 65, limiting block; 66, support plate; 7, U-shaped plate; 8, conveyor belt; 9, rotating shaft.

[0040] As shown in the figure, in order to clearly show the structure of the embodiments of the present invention, specific structures and devices are marked in the figure, but this is only for schematic purposes and is not intended to limit the present invention to this specific structure, device and environment. According to specific needs, those of ordinary skill in the art can adjust or modify these devices and environments, and the adjustments or modifications still fall within the scope of the appended claims. Specific Embodiments

[0041] To make the objectives, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention are described clearly and completely. Obviously, the described embodiments are some, but not all, of the embodiments of the present invention. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present invention without creative efforts fall within the protection scope of the present invention.

[0042] To better understand the above technical solutions, the above technical solutions will be described in detail below in conjunction with the accompanying drawings of the specification and specific embodiments.

[0043] Embodiment 1: As Figure 1 - Figure 8As shown in the figure, an embodiment of the present invention provides a flipping device for roll-coating solder paste on both the front and back sides of heat exchanger fins, including: a clamping part for clamping the conveyed fins. The clamping part includes: a first clamping arm 41 and a second clamping arm 46, which are arranged staggeredly. There are two clamping parts in total, and the two clamping parts are symmetrically distributed on both sides of the rotating shaft 9. The clamping part further includes: a first fixing ring 42, which is fixedly connected to the first clamping arm 41. A second fixing ring 44 is arranged on the side of the first fixing ring 42 away from the first clamping arm 41. A limiting ring 45 is arranged on the side of the second fixing ring 44 away from the first clamping arm 41. The first fixing ring 42, the second fixing ring 44, and the limiting ring 45 are all fixedly connected to the rotating shaft 9. An outward expanding plate 47 is connected to the side surface of the second fixing ring 44, and the side of the outward expanding plate 47 away from the first fixing ring 42 is connected to the second clamping arm 46. The first clamping arm 41 is arranged below the second clamping arm 46. A blocking block 48 is connected to the side of the second fixing ring 44 away from the first clamping arm 41. The first clamping arm 41 and the second clamping arm 46 are arranged staggeredly in both the horizontal and vertical directions, and the rotating part of the rotating shaft 9 is connected to a bidirectional motor.

[0044] The first clamping arm 41 and the second clamping arm 46 are respectively located on the sides of the first fixing ring 42 and the second fixing ring 44 that are away from each other. By adding the first fixing ring 42 and the second fixing ring 44 between the first clamping arm 41 and the second clamping arm 46, the distance between the first clamping arm 41 and the second clamping arm 46 is increased, so that the distance between the first clamping arm 41 and the second clamping arm 46 is 0.2 - 0.5 times the width of the fin.

[0045] The staggered arrangement of the first clamping arm 41 and the second clamping arm 46 (including the horizontal and vertical directions) can increase their contact area. In cases where pressure or friction needs to be transmitted, a larger contact area can improve the efficiency of force transmission, reduce the pressure per unit area, and reduce the possibility of wear and fatigue failure; the staggered arrangement makes the connection points between the first clamping arm 41 and the second clamping arm 46 more evenly distributed, and the force can be more effectively transmitted and dispersed between the two clamping plates. Compared with the parallel arrangement, the staggered arrangement can avoid stress concentration at certain specific points or regions, thereby improving the ability of the overall structure to resist external forces and making the structure more stable; the staggered arrangement of the first clamping arm 41 and the second clamping arm 46 in the vertical direction can increase the torsional stiffness of the structure. When the structure is subjected to torsional force, the staggered first clamping arm 41 and second clamping arm 46 can restrict each other and prevent each other from twisting, so that the entire structure has better anti-torsion stability; when the staggered first clamping arm 41 and second clamping arm 46 are subjected to external forces, the first clamping arm 41 and the second clamping arm 46 will pull and squeeze each other through the staggered parts. This interaction enables the structure to withstand greater deformation before failure, showing better toughness and improving the seismic resistance, impact resistance and other performance of the structure.

[0046] The rotating part is controlled by a rotating shaft 9 to flip the clamping part clockwise or counterclockwise by 180°.

[0047] A conveyor belt 8 is arranged inside the box body 1. The conveyor belt 8 is used to convey the fins to the clamping part. The clamping length of the clamping part is two-sevenths to three-sevenths of the fin length.

[0048] When the clamping length of the clamping part is two-sevenths of the fin length, the clamping length is short, the manufacturing cost of the clamping part is low, and it is convenient for the fin to break away from the clamping part after flipping.

[0049] When the clamping length of the clamping part is three-sevenths of the fin length, the clamping length is long, the clamping stability is high, and during the clamping and flipping process, the fin is not easy to fall off from the clamping part, improving the stability.

[0050] The top of the transfer table 2 is on the same plane as the top of the conveyor belt 8. During use, the fin moves along the conveyor belt 8 and approaches the clamping part. The first clamping arm 41 and the second clamping arm 46 are arranged in an interleaved manner, and there is a clamping gap between the first clamping arm 41 and the second clamping arm 46. The fin enters the clamping gap and is clamped by the first clamping arm 41 and the second clamping arm 46. The bidirectional motor is started. The rotating part of the bidirectional motor drives the first fixing ring 42, the second fixing ring 44, the first clamping arm 41, and the second clamping arm 46 to flip 180° through the rotating shaft 9. One end of the fin contacts the surface of the transfer table 2 and moves with the transmission device under the action of friction force, and the fin is completely withdrawn from the clamping gap. The bidirectional motor rotates 180° in the reverse direction, and the clamping part returns to the initial position.

[0051] Embodiment 2: As Figure 1 - Figure 13 shown, an embodiment of the present invention provides a flipping device for roll-coating solder paste on both sides of a heat exchanger fin, including: a buffer part for reducing the impact force received by the fin during flipping. The buffer part is arranged between the rotating part and the transfer table 2. The buffer part includes: a bow-shaped arc plate located between the rotating shaft 9 and the transfer table 2. The center of the bottom of the bow-shaped arc plate is connected with a moving rod 62. Both ends of the bottom of the bow-shaped arc plate are connected with a U-shaped plate 7 through springs 64. The top of the U-shaped plate 7 is connected with a cylinder body 63. Both ends of the U-shaped plate 7 are connected with the side surface of the transfer table 2. The bottom end of the moving rod 62 extends into the cylinder body 63 and is slidably connected with the inner wall of the cylinder body 63. The middle part of the side surface of the cylinder body 63 is connected with a limiting block 65 through a support plate 66. The limiting block 65 is adapted to the bow-shaped ring plate 61. The limiting block 65 is used to support the bow-shaped ring plate 61. The top of the limiting block 65 is located above the transfer table 2. The limiting block 65 is an elastic plate. The distance between the axis of the rotating shaft 9 and the transfer table 2 is less than the length of the fin.

[0052] When the top of the bow-shaped ring plate 61 is squeezed, the bow-shaped ring plate 61 moves downward along with the moving rod 62. The sliding connection between the moving rod 62 and the cylinder body 63 also plays a guiding role, so that the bow-shaped ring plate 61 can only move vertically downward along the longitudinal axis of the cylinder body 63, ensuring that the downward displacement distances of all positions at the top of the bow-shaped ring plate 61 are basically the same, avoiding tilting at the top of the bow-shaped ring plate 61 and making the top of the bow-shaped ring plate 61 in full contact with the fin.

[0053] During the flipping process of the fin, the fin impacts the bow-shaped ring plate 61, and the bow-shaped ring plate 61 moves downward and is extruded from the limit block 65. The limit block 65 is an elastic rubber block. The limit block 65 supports the bow-shaped ring plate 61, and the bow-shaped ring plate 61 can no longer move downward, so that the bow-shaped ring plate 61 has a minimum height, which is convenient for the top of the bow-shaped ring plate 61 and the inclined second clamping arm 46 to form a downward-sliding channel with the same inclination angle, facilitating the fin to slide down onto the transfer table 2.

[0054] The distance from the top of the bow-shaped ring plate 61 to the clamping part is two-thirds of the fin length, and the distance from the top of the bow-shaped ring plate 61 to one end of the transfer table 2 is one-fourth of the fin length.

[0055] The distance from the top of the bow-shaped ring plate 61 to the clamping part is two-thirds of the fin length. The top of the limit block 65 is located above the transfer table 2, ensuring that one end of the fin cannot directly contact the transfer table 2 immediately during the flipping process, but needs to first contact the top of the buffer part (bow-shaped ring plate 61), and the buffer part buffers the instantaneous impact force generated by the rapid flipping of the fin, reducing the damage to the fin and the clamping part.

[0056] However, in order to ensure that the fin after buffering can quickly and easily slide from the clamping part onto the transfer table 2, one end of the fin needs to slide onto the transfer table 2 by means of an inclined plane and accelerate the extraction of the fin from the clamping part by means of the friction of the transfer table 2. Therefore, after flipping, one end of the fin cannot be too far away from the transfer table 2. Therefore, the distance from the top of the bow-shaped ring plate 61 to one end of the transfer table 2 can be set to one-fourth of the fin length.

[0057] The stretching part makes the second clamping arm 46 tilt after flipping through inertia and elasticity and cooperates with the buffer part to guide the fin to slide into the transfer table 2 along the inclined plane. The stretching part includes: a sector ring plate 53, the shape of the sector ring plate 53 is adapted to the connection part of the second fixed ring 44 and the outward expanding plate 47. One side of the sector ring plate 53 close to the rotating shaft 9 is connected with a rotating ring 56. The rotating ring 56 is arranged between the second fixed ring 44 and the limiting ring 45, and the rotating ring 56 is rotatably connected with the rotating shaft 9. One side of the sector ring plate 53 close to the first clamping arm 41 is connected with a first arc plate 54 and a second arc plate 55. The first arc plate 54 is adapted to the outward expanding plate 47 and is arranged outside the outward expanding plate 47. The second arc plate 55 is adapted to the second fixed ring 44 and is arranged outside the second fixed ring 44. The first arc plate 54 is connected with the second arc plate 55 through a vertical plate. One edge of the sector ring plate 53 close to one end of the first clamping arm 41 is connected with a first connecting plate 57. The first connecting plate 57 is connected with a second connecting plate 59 through a hook body spring 58. The second connecting plate 59 is connected with the end part of the second clamping arm 46 on the side far away from the first clamping arm 41. The middle part of one side of the sector ring plate 53 close to the first clamping arm 41 is connected with a sliding block 52. A sliding groove 51 is opened on one side of the second fixed ring 44 close to the sector ring plate 53. The sliding block 52 is slidably connected with the sliding groove 51. One end of the rotating rod 43 sequentially passes through the first fixed ring 42 and the second fixed ring 44 and is rotatably connected with the second clamping arm 46. The length of the sliding groove 51 is greater than the length of the sliding block 52. The axis of the sliding groove 51 is collinear with the axis of the rotating shaft 9. A rotating rod 43 is arranged on the side of the sector ring plate 53 far away from the first clamping arm 41. The transfer table 2 is connected with a welding box 3. The transfer table 2 is used to transfer the fin into the welding box 3.

[0058] The length of the sliding groove 51 is greater than the length of the sliding block 52 to ensure that the sliding block 52 can slide in the sliding groove 51, so that the second clamping arm 46 can tilt. However, the length of the sliding groove 51 cannot be too long, otherwise the tilting angle of the second clamping arm 46 is large, the stretching length of the hook body spring 58 is long, which is not conducive to the second clamping arm 46 rotating back to the initial state and will also reduce the service life of the hook body spring 58.

[0059] When the clamping part is located inside the box body 1 and not rotating, the second clamping arm 46 is in the starting state, and the stopper 48 supports the second clamping arm 46. The stopper 48 can prevent one end of the second clamping arm 46 from rotating downward under the action of gravity, and can also prevent the second clamping arm 46 from rotating back to the original position after flipping. By blocking the second clamping arm 46 with the stopper 48, it can prevent the clamping arm from crossing the stopper 48 under the action of inertia and gravity, thereby restricting the clamping gap between the second clamping arm 46 and the first clamping arm 41, avoiding too large a clamping gap, and ensuring the stability of clamping. The top of the second clamping arm 46 is on the same plane as the surface of the conveyor belt 8. After the clamping part is flipped 180°, the second clamping arm 46 is in the state after flipping. When the second clamping arm 46 continues to rotate and the angle with the horizontal plane is 10 - 15°, the second clamping arm 46 is in the terminal state, and the fins slide down along the second clamping arm 46 and the top of the arcuate ring plate 61 to the transfer table 2, and the slider 52 slides from one end of the chute 51 to the other end of the chute 51.

[0060] The elastic coefficient of the spring 64 is small, but the spring 64 has strong recovery ability, and the spring 64 can be made of brass.

[0061] During flipping, the speed is fast. After flipping 180°, the second clamping arm 46 cannot remain stationary under the stretching action of the spring 64. The second clamping arm 46 cannot stop immediately under the action of inertia and gravity, and the second clamping arm 46 continues to rotate downward. After rotation, when the angle between the second clamping arm 46 and the horizontal plane is 10°, the inclination angle is small, and the fins slowly fall along the inclined plane and move down gently; when the angle between the second clamping arm 46 and the horizontal plane is 15°, the inclination angle is large, and the component force along the inclined plane downward is large, which speeds up the sliding speed of the fins and improves the flipping efficiency.

[0062] The top of the transfer table 2 is located below the top of the conveyor belt 8. During use, the fin enters the clamping gap between the first clamping arm 41 and the second clamping arm 46 along the conveyor belt 8. The rotating part of the bidirectional motor drives the first clamping arm 41, the second clamping arm 46, and the fin to flip. During the flipping process, the fin approaches and impacts the bow-shaped ring plate 61. Under the action of the impact force, the bow-shaped ring plate 61 drives the moving rod 62 to move downward along the longitudinal axis of the cylinder body 63, and the spring 64 is compressed. The fin and the bow-shaped ring plate 61 are separated from each other. The fin continues to flip, and the bow-shaped ring plate 61 impacts the limit block 65. The limit block 65 is an elastic rubber block, and the elastic rubber block can relieve the instantaneous impact force of the bow-shaped ring plate 61. By blocking the bow-shaped ring plate 61 with the limit block 65, the bow-shaped ring plate 61 is prevented from continuing to move downward, forcing the bow-shaped ring plate 61 to quickly move upward under the restoring action of the spring 64 and contact the bottom of the fin. At this time, the fin is mainly clamped by the clamping part, and the acting force of one end of the fin on the bow-shaped ring plate 61 is small. When the fin flips to 180°, the bidirectional motor stops rotating. However, the flipping speed is fast. After flipping 180°, the second clamping arm 46 cannot remain stationary under the stretching action of the spring 64. The second clamping arm 46 needs to continue to rotate downward under the action of inertia and gravity. The second clamping arm 46 has a tendency to continue to rotate downward. The second clamping arm 46 drives the hook body spring 58, the sector ring, the rotating ring 56, the slider 52, the first arc plate 54, and the second arc plate 55 to rotate in the circumferential direction. The slider 52 moves from one end of the chute 51 to the other end. The length of the slider 52 is 0.9 - 0.95 times the length of the chute 51. The second clamping arm 46 is inclined. At this time, the fin in the clamping gap becomes loose, and the end of the fin close to the transfer table 2 moves downward. At this time, the bottom of the fin presses down the bow-shaped ring plate 61, and the spring 64 is compressed. Under the elastic action, the top of the bow-shaped ring plate 61 and the upper surface of the second clamping arm 46 are on the same inclined plane. The fin slides down along the inclined plane, and one end of the fin quickly contacts the transfer table 2. The fin slides out of the clamping gap under the action of the inclined sliding and frictional force. At this time, the length of the fin away from the bow-shaped ring plate 61 and the box body 1 is less than half of the total length of the fin, and the fin will not flip off the bow-shaped ring plate 61. When the fin is withdrawn from the clamping gap, the bidirectional motor reverses and drives the clamping part back to the initial position. The gravity of the fin is mainly concentrated on the bow-shaped ring plate 61, and the pressure on the bow-shaped ring plate 61 increases. The spring 64 continues to be compressed until the bottom of the bow-shaped ring plate 61 contacts the elastic block. At this time, the height difference between the top of the bow-shaped ring plate 61 and the transfer table 2 is small. When one end of the fin lands on the transfer table 2, the impact force between the two is small, reducing the damage to the fin. The bow-shaped ring plate 61 is a parabola with an opening downward. The extrusion area between the top of the bow-shaped ring plate 61 and the fin is small, and the bow-shaped ring plate 61 is composed of two arc-shaped plates, which is convenient for fitting with the fin and guiding the fin to slide off.

[0063] The present invention covers any alternatives, modifications, equivalent methods, and solutions made within the spirit and scope of the present invention. For the public to have a thorough understanding of the present invention, specific details have been described in detail in the above preferred embodiments of the present invention. However, those skilled in the art can fully understand the present invention even without the description of these details. Additionally, well-known methods, processes, flows, components, and circuits, etc. have not been described in detail to avoid unnecessary confusion to the essence of the present invention.

[0064] The above description is only a preferred embodiment of the present invention. It should be noted that for those of ordinary skill in the art, without departing from the principle of the present invention, several improvements and refinements can be made, and these improvements and refinements should also be regarded as within the protection scope of the present invention.

Claims

1. A flipping device for rolling solder paste on the front and back sides of a heat exchanger fin, comprising: A box body (1) and a welding box (3), wherein a conveying platform (2) is arranged between the box body (1) and the welding box (3), and the conveying platform (2) is characterized by comprising: A clamping part, used for clamping the transported fins, the clamping part is mounted on one end of the box body (1) close to the welding box (3), the clamping part comprises: a first clamping arm (41) and a second clamping arm (46), the first clamping arm (41) and the second clamping arm (46) being arranged alternately; A rotating part, used for controlling the clamping part to flip 180 degrees via a rotating shaft (9), the rotating part being connected to the clamping part; A buffer portion, used to reduce the impact force on the fin when it turns over, the buffer portion being arranged between the rotating portion and the conveying platform (2); The stretching part causes the second clamping arm (46) to tilt after flipping through inertia and elasticity, and cooperates with the buffer part to guide the fin to slide along the inclined surface into the conveying platform (2), and one end of the stretching part is connected to the second clamping arm (46).

2. The flipping device for rolling solder paste on the front and back sides of heat exchanger fins according to claim 1 is characterized in that: There are two clamping parts in total, and the two clamping parts are symmetrically distributed on both sides of the rotating shaft (9). The clamping part also includes: a first fixing ring (42), the first fixing ring (42) is fixedly connected to the first clamping arm (41), a second fixing ring (44) is provided on the side of the first fixing ring (42) away from the first clamping arm (41), a limiting ring (45) is provided on the side of the second fixing ring (44) away from the first clamping arm (41), the first fixing ring (42), the second fixing ring (44) and the limiting ring (45) are all fixedly connected to the rotating shaft (9), an outer expansion plate (47) is connected to the side of the second fixing ring (44), and the side of the outer expansion plate (47) away from the first fixing ring (42) is connected to the second clamping arm (46), the first clamping arm (41) is arranged below the second clamping arm (46), and a stopper (48) is connected to the side of the second fixing ring (44) away from the first clamping arm (41).

3. The flipping device for rolling solder paste on the front and back sides of heat exchanger fins according to claim 2 is characterized in that: The stretching portion comprises: a fan ring plate (53), wherein the fan ring plate (53) is adapted to the shape of a connection portion between the second fixing ring (44) and the outer expansion plate (47), a rotating ring (56) is connected to a side of the fan ring plate (53) close to the rotating shaft (9), the rotating ring (56) is arranged between the second fixing ring (44) and the limiting ring (45), and the rotating ring (56) is rotatably connected to the rotating shaft (9), a first arc plate (54) and a second arc plate (55) are connected to a side of the fan ring plate (53) close to the first clamping arm (41), the first arc plate (54) is adapted to the outer expansion plate (47) and is arranged on the outer side of the outer expansion plate (47), the second arc plate (55) is adapted to the second fixing ring (44) and is arranged on the outer side of the second fixing ring (44), the first arc plate (54) is connected to the second arc plate (55) via a vertical plate, and the fan ring plate (53) close to the first clamping arm ( A first connecting plate (57) is connected to an edge of one end of the fan ring plate (41), the first connecting plate (57) is connected to a second connecting plate (59) via a hook spring (58), the second connecting plate (59) is connected to an end of the second clamping arm (46) away from the first clamping arm (41), a slider (52) is connected to the middle of the fan ring plate (53) close to the first clamping arm (41), a sliding groove (51) is provided on the side of the second fixing ring (44) close to the fan ring plate (53), the slider (52) is slidably connected to the sliding groove (51), a rotating rod (43) is provided on the side of the fan ring plate (53) away from the first clamping arm (41), one end of the rotating rod (43) passes through the first fixing ring (42) and the second fixing ring (44) in sequence and is rotatably connected to the second clamping arm (46), the slider (52) slides from one end of the sliding groove (51) to the other end of the sliding groove (51).

4. The flipping device for rolling solder paste on the front and back sides of heat exchanger fins according to claim 3 is characterized in that: The length of the slide groove (51) is greater than the length of the slider (52), the axis of the slide groove (51) is colinear with the axis of the rotating shaft (9), and the first clamping arm (41) and the second clamping arm (46) are staggered in both the horizontal direction and the vertical direction.

5. The flipping device for rolling solder paste on the front and back sides of heat exchanger fins according to claim 1 is characterized in that: The buffer portion comprises: an arcuate plate, the arcuate plate being located between the rotating shaft (9) and the conveying platform (2), a shift rod (62) being connected to the center of the bottom of the arcuate plate, both ends of the bottom of the arcuate plate being connected to a U-shaped plate (7) via a spring (64), a cylinder (63) being connected to the top of the U-shaped plate (7), both ends of the U-shaped plate (7) being connected to the side of the conveying platform (2), the bottom end of the shift rod (62) extending into the cylinder (63) and being slidably connected to the inner wall of the cylinder (63), a limit block (65) being connected to the middle of the side of the cylinder (63) via a support plate (66), the limit block (65) being adapted to the arcuate ring plate (61), and the limit block (65) being used to support the arcuate ring plate (61).

6. The flipping device for rolling solder paste on the front and back sides of heat exchanger fins according to claim 5 is characterized in that: The top of the limit block (65) is located above the conveying platform (2), the limit block (65) is an elastic plate, the distance between the axis of the rotating shaft (9) and the conveying platform (2) is less than the length of the fin, the distance from the top of the arched ring plate (61) to the clamping portion is two-thirds of the length of the fin, and the distance from the top of the arched ring plate (61) to one end of the conveying platform (2) is one-quarter of the length of the fin.

7. The flipping device for rolling solder paste on the front and back sides of heat exchanger fins according to claim 2 is characterized in that: When the clamping portion is located in the box body (1) and does not rotate, the second clamping arm (46) is located in a starting state, the stopper (48) supports the second clamping arm (46), and the top of the second clamping arm (46) is located in the same plane as the surface of the conveyor belt (8). When the clamping portion is flipped 180°, the second clamping arm (46) is located in a post-rotation state. When the second clamping arm (46) continues to rotate and the angle with the horizontal plane is 10-15°, the second clamping arm (46) is located in a terminal state, and the fin slides down along the second clamping arm (46) and the top of the bow-shaped ring plate (61) to the conveying platform (2).

8. The flipping device for rolling solder paste on the front and back sides of heat exchanger fins according to claim 7 is characterized in that: A conveyor belt (8) is arranged in the box body (1), and the conveyor belt (8) is used to convey the fins to the clamping part. The clamping length of the clamping part is two-sevenths to three-sevenths of the length of the fins. The rotating part of the rotating shaft (9) is connected to a bidirectional motor. The conveying platform (2) is used to convey the fins into the welding box (3).

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