Blanking device and blanking method

Abstract

The invention relates to a blanking device which is used for assembling a heat exchanger core and comprises a feeding channel and a discharging channel, the feeding channel is arranged in the first direction, the feeding channel comprises a first side and a second side, the feeding channel is provided with a containing space, the containing space has a preset height, the feeding channel is provided with a feeding check block, and the feeding check block is arranged to move in the first direction; the reset part acts on the limiting part, when the limiting part is in the first state, at least part of the limiting part is located in the containing space, when the limiting part is in the second state, the limiting part is located outside the containing space, and the reset part can change the limiting part from the second state to the first state; by arranging the limiting assembly, the flat pipes which are adsorbed to each other can be separated, so that the situation that the flat pipes are clamped is reduced, clamping of the assembling machine is reduced, and the machining efficiency of the assembling machine is improved.

Description

Technical Field

[0001] The present application relates to the field of heat exchangers, and in particular to a blanking device and a blanking method. Background Art

[0002] In the field of heat exchangers, heat exchanger core assembly has always been a very important step. The existing heat exchanger core assembly needs to be completed by an assembly machine. When the existing assembly machine is blanking flat tubes, due to the flaky characteristics of the flat tubes and the smooth contact surface of the flat tubes, adjacent flat tubes are easily adsorbed to each other, resulting in two flat tubes being blanked at the same time, causing the assembly machine to jam or forming defective products. Summary of the invention

[0003] In order to solve the above technical problems, the present application provides a blanking device for assembling a heat exchanger core, comprising: a feeding channel, the feeding channel is arranged along a first direction, the feeding channel comprises a first side and a second side which are opposite to each other, there is a accommodating space between the first side and the second side of the feeding channel, the accommodating space has a preset height, the feeding channel is provided with a feeding stopper, the feeding stopper is arranged to move along the first direction; a limiting assembly, and is located at the outlet of the feeding channel; there is at least one limiting assembly along the second direction; the limiting assembly comprises a limiting part and a resetting part, the resetting part acts on the limiting part, when the limiting part is in a first state, the limiting part is at least partially located in the accommodating space, when the limiting part is in a second state, the limiting part is located outside the accommodating space, the resetting part can change the limiting part from the second state to the first state; the accommodating space is a virtual space, whose length is greater than or equal to the length of the flat tube, the height of the accommodating space is equal to the height of the flat tube, the flat tube can be stored therein, the height of the feeding channel is greater than or equal to the height of the accommodating space, The flat tubes will be placed in the accommodating space in sequence and closely arranged, and will be dropped from the outlet of the feeding channel in sequence. When the limiting assembly is in the first state, the end of the limiting part enters the accommodating space to separate the adjacent flat tubes. A flat tube close to the outlet will drop from the outlet of the feeding channel, and the other will be blocked by the limiting assembly in the accommodating space, waiting for the next drop. The feeding block pushes the flat tube to move a certain distance, maintaining the preload force. Under the action of external force, the limiting part leaves the accommodating space and changes to the second state. The blocked flat tube drops from the outlet of the dropping channel. Under the action of the reset part, the limiting part is in the first state, completing a cycle. Through the limiting assembly, the adsorption force between adjacent flat tubes can be overcome, the adsorbed flat tubes can be separated, and the flat tubes can be dropped from the outlet of the feeding channel one by one, thereby avoiding the problem of the assembly machine blocking the flat tubes and improving the qualified rate of the heat exchanger. In this embodiment, the first direction is the front-to-back direction of the feeding channel, and the outlet of the feeding channel is the front; the second direction is the left-to-right direction of the feeding channel.

[0004] Optionally, a limit assembly is arranged on a first side of the feeding channel, the limit assembly includes a limit hole arranged along a third direction, the reset part includes an elastic part arranged in the limit hole, the limit part is arranged in the limit hole, the elastic part acts on the limit part, so that the limit part can at least partially extend out of the limit hole, so that the limit assembly is in a first state, and after being subjected to a first preset pressure in the third direction, it can at least partially retract into the limit hole, so that the limit assembly is in a second state, and the end of the limit part away from the elastic part has a hemispherical surface or a spherical surface; the limit assembly includes a limit hole along a third direction, the third direction is the up and down direction, the limit part is a ball screw, the shape of a ball, the reset part is an elastic part such as a spring, which is arranged in the limit hole, and the limit The part can slide along the limiting hole. The first state is a natural state. The elastic member acts on the limiting part to push the limiting part out. The end of the limiting part away from the elastic member is a spherical surface. In other embodiments, it can be a hemispherical surface. Since the two surfaces in the width direction of the flat tube are convex curved surfaces, a gap will be formed between two adjacent flat tubes in the width direction. The arc-shaped end of the limiting part can be inserted between the two adjacent flat tubes to destroy the vacuum environment and adsorption force between the adjacent flat tubes, so that the adjacent flat tubes are no longer adsorbed to each other. The flat tube located outside can be dropped from the outlet of the blanking channel, while the flat tube located inside is blocked by the limiting part until the next drop of the blanking assembly is closest to the blanking channel. The flat tube at the outlet of the feeding channel moves toward the outlet of the blanking channel under the external force of the blanking assembly, and the convex surface of the flat tube contacts the arc surface of the limiting part, and gradually generates an extrusion force in the third direction, i.e., the up and down directions, on the limiting part, and finally overcomes the pressure of the elastic member. In this embodiment, the pressure grams of the elastic member is defined as a first preset pressure, that is, when the elastic member receives an extrusion force exceeding the first preset pressure, the limiting part will not be located in the accommodating space, and the limiting part shrinks into the limiting hole, leaving the accommodating space and changing to the second state. The flat tube finally leaves the feeding channel and blanks from the outlet. At the same time, when the convex surface of the flat tube loses contact with the arc-shaped end face of the limiting part, the extrusion force disappears, and the elastic member Under the action of , the limit part is reset and changes to the first state again, and the feeding stopper moves a certain distance toward the outlet of the feeding channel, so that the flat tube behind maintains a certain pre-tightening force, and the outermost flat tube is against the limit part to complete one blanking; the convex curved surface in the width direction of the flat tube is cleverly utilized, and the end of the limit component is designed to be a spherical surface that matches the convex curved surface. With the elastic part, the automatic separation of adjacent flat tubes can be realized, which is low in cost, and the surface of the spherical surface is smooth and will not scratch the flat tube. It can efficiently realize the blanking of a single flat tube, thereby avoiding the problem of the assembly machine getting stuck with the flat tube and improving the qualified rate of the heat exchanger; in other embodiments, the elastic part can be replaced by other electric devices.

[0005] Optionally, an equal number of limit assemblies are provided on the first side and the second side of the feeding channel, and positions of the limit assemblies on the first side and the limit assemblies on the second side correspond to each other.

[0006] Optionally, the feeding channel includes a feeding table and a frame, the frame is fixedly connected to the feeding table, the frame is provided with at least one guide plate, the guide plate is positioned opposite to the feeding table, the guide plate is arranged on a first side of the feeding channel, the feeding table is arranged on a second side of the feeding channel, the feeding channel also includes a feeding stopper, the feeding stopper is slidably connected to the feeding table, the feeding stopper has an end portion higher than the plane of the feeding table, and can move along the feeding channel to a limiting assembly; the feeding channel is mainly formed by a plurality of guide plates to form a first side, i.e., an upper part of the feeding channel, the feeding table forms a lower part of the feeding channel, i.e., a second side, a feeding trough is provided on the feeding table, the feed stopper is quickly slidably connected to the feeding trough, the upper end portion of the feeding stopper is higher than the feeding table, and is used to push the flat tube to move toward the outlet of the feeding channel.

[0007] Optionally, the limiting portion includes a limiting stopper, which is hingedly arranged on the first side and / or the second side of the feeding channel, and the limiting stopper is connected to a reset portion, and the reset portion includes a torsion spring, which acts on the limiting stopper, and when the limiting stopper is in a first state under the action of the reset torsion spring, at least part of the limiting stopper enters the feeding channel, and after the limiting stopper is subjected to a second preset pressure in a third direction, the limiting stopper changes to a second state, and the part of the limiting stopper entering the feeding channel is reduced or retracted; the limiting portion is a limiting stopper, which is hingedly arranged on the lower side of the feeding channel and is connected to Torsion spring, when the flat tube closest to the outlet of the feeding channel is acted upon by the suction cup and guide rod of the blanking assembly and moves toward the outlet of the feeding channel, the width direction of the flat tube gradually squeezes the limit block, and the limit block changes from the large inclination state of the first state to the small inclination state or horizontal state of the second state. After the flat tube leaves, it automatically changes to the large inclination state of the first state under the action of the torsion spring, blocking the flat tube behind and completing a blanking operation. The blanking of a single flat tube can also be controlled by the limit block to avoid adsorption together, causing the assembly machine to jam and the production of defective products.

[0008] Optionally, it also includes a blanking assembly, which includes a transfer part that can move along the second direction, the transfer part is provided with an adsorption part, the adsorption part is connected to a vacuum generator, the transfer part can generate a third preset pressure along the second direction, and the third preset pressure is greater than the first preset pressure or the second preset pressure; the blanking assembly is a vacuum adsorption assembly, including a transfer part, the transfer part is a guide rod that can move back and forth, the end of the guide rod is provided with an adsorption part, i.e., a suction cup, the suction cup is connected to the vacuum generator, when working, the guide rod drives the suction cup to approach the flat tube closest to the outlet, the suction cup generates negative pressure, and firmly sucks the flat tube, further, the guide rod drives the suction cup to be The adsorbed flat tube moves toward the exit of the feeding channel, the limiting part moves into the limiting hole and leaves the accommodating space, the adsorbed flat tube is moved out, and after reaching the blanking position, the suction cup stops adsorption, the flat tube 7 falls down, and a blanking is completed; through the suction of the suction cup and the transfer of the guide rod, the flat tube can be protected to the greatest extent and will not be damaged during the blanking process, thereby improving the quality of the product; in other embodiments, other blanking methods can be adopted; in this embodiment, the third preset pressure is the traction force driven by the guide rod to drive the flat tube outside the feeding channel, and the traction force is sufficient to enable the flat tube to overcome the obstruction of the limiting part and push the limiting part out of the accommodating space.

[0009] Optionally, it also includes a blanking component, the blanking component includes a blanking channel, the blanking channel is arranged at the outlet of the feeding channel, the blanking channel includes a first inclined surface and a second inclined surface, the first inclined surface and the second inclined surface have a preset distance, and the surface is smooth, the blanking channel is inclined as a whole, and also includes a blanking outlet, the blanking outlet is arranged at the lower part of the blanking channel; the blanking component is no longer a vacuum adsorption component, the blanking component of this embodiment includes a blanking channel, the blanking channel is arranged at the outlet of the feeding channel, the blanking channel includes a first inclined surface and a second inclined surface, the first inclined surface and the second inclined surface have a preset distance, and the surface is smooth, the blanking channel is inclined as a whole, and also includes a blanking outlet, the blanking outlet is arranged at the lower part of the blanking channel; in this embodiment, the flat tube moves out of the blanking channel The power source of the channel is the feeding stop block, which pushes the distance of a flat tube forward. The flat tube moves toward the outlet of the feeding channel as a whole under the push of the feeding stop block. The flat tube closest to the outlet will push the limit part back through the convex curved surface in the width direction, and the limit part changes to the second state. The flat tube enters the blanking channel from the feeding channel. The blanking channel has a first inclined surface and a second inclined surface. There is a preset distance between the first inclined surface and the second inclined surface, which is smaller than the width of the flat tube. The flat tube cannot fall horizontally from the blanking channel. Under the cover of the second inclined surface, it slides down roughly vertically along the first inclined surface to complete the blanking. Through the setting of the blanking channel, the falling direction of the flat tube can be controlled, and there is no vacuum adsorption component, the structure is simpler and more reliable, and the cost is low.

[0010] Optionally, the feeding channel is provided with a blowing hole, the blowing hole is connected to a blowing device, and the blowing device is configured to intermittently or continuously blow airflow to the feeding channel; a blowing device and a blowing hole can be arranged on the upper and lower sides of the feeding channel 1, and when the flat tube is no longer blocked by the limiting component, the blowing device blows air to transfer the flat tube to the blanking channel to complete the blanking, thereby preventing the flat tube from being trapped in the feeding channel and improving the efficiency of blanking.

[0011] The present application also discloses an assembly machine, including a blanking device, the blanking device including: A feeding channel, the feeding channel is arranged along a first direction, the feeding channel includes a first side and a second side that are relatively positioned, there is a accommodating space between the first side and the second side of the feeding channel, the accommodating space has a preset height, the feeding channel is provided with a feeding stopper, the feeding stopper is arranged to move along the first direction; a limiting assembly, and is located at the outlet of the feeding channel; there is at least one limiting assembly along the second direction; the limiting assembly includes a limiting part and a reset part, the reset part acts on the limiting part, when the limiting part is in a first state, the limiting part is at least partially located in the accommodating space, when the limiting part is in a second state, the limiting part is located outside the accommodating space, the reset part can change the limiting part from the second state to the first state; through the blanking device, the problem of mutual adsorption in the process of blanking of flat tubes is solved.

[0012] The present application also discloses a blanking method for blanking flat tubes during the assembly process of a heat exchanger, comprising the following steps: The workpiece to be processed is placed in the accommodating space of the feeding channel, the reset portion acts on the limiting portion, the limiting portion is in a first state, the limiting portion at least partially enters the accommodating space and blocks the workpiece to be processed from passing through the feeding channel; The limiting part is in the second state, does not enter the accommodation space, and the workpiece to be processed passes through the outlet of the feeding channel; Under the action of the resetting part, after the outlet of the feeding channel of the workpiece to be processed is reached, the limiting part is in the first state.

[0013] Optionally, after the limiting part blocks the workpiece to be processed from passing through the feeding channel, the following steps are further included: The adsorption part starts negative pressure adsorption on a workpiece near the outlet of the feeding channel, and the transfer part drives the workpiece to be processed to move out of the feeding channel along the second direction; The adsorption part drives the workpiece to be processed to overcome the clamping force of the limiting part, and the spherical surface or hemispherical surface of the limiting part slides along the curved surface in the width direction of the workpiece to be processed. The limiting part changes from the first state to the second state, and the adsorbed workpiece to be processed escapes from the feeding channel. Under the action of the resetting part, the limiting part pops up along the third direction and enters the accommodating space, changing to the first state. The spherical or hemispherical end of the limiting part contacts the curved surface in the width direction of the workpiece to be processed closest to the outlet of the feeding channel, blocking the workpiece to be processed behind. At the same time, the feeding stopper pushes forward a distance of a first preset length. The transfer part transfers the workpiece to be processed to the assembly structure, and the adsorption part stops adsorption, and the workpiece to be processed falls.

[0014] The blanking assembly is a vacuum adsorption assembly, including a transfer part, which is a guide rod that can move forward and backward. The end of the guide rod is provided with an adsorption part, i.e., a suction cup, which is connected to a vacuum generator. When working, the guide rod drives the suction cup to approach the flat tube closest to the outlet, and the suction cup generates negative pressure to firmly adsorb the flat tube. Further, the guide rod drives the adsorbed flat tube to move toward the outlet of the feeding channel, and the limiting part moves into the limiting hole, leaving the accommodating space, and the adsorbed flat tube is moved out. After reaching the blanking position, the suction cup stops adsorption, and the flat tube falls down, completing a blanking operation. Through the absorption of the suction cup and the transfer of the guide rod, the flat tube can be protected to the greatest extent and will not be damaged during the blanking process, thereby improving the quality of the product. In other embodiments, other blanking methods can be adopted. In this embodiment, the third preset pressure is the traction force outside the feeding channel driven by the guide rod, and the traction force is sufficient to enable the flat tube to overcome the obstruction of the limiting part and push the limiting part out of the accommodating space.

[0015] Optionally, after the limiting part blocks the workpiece to be processed from passing through the feeding channel, the following steps are further included: The feeding stopper moves forward by a first preset length, the workpiece to be processed moves along the feeding channel, the workpiece to be processed closest to the blanking channel overcomes the pressing force of the limiting part, the limiting part changes from the first state to the second state, the workpiece to be processed closest to the outlet of the blanking channel escapes from the feeding channel, and the limiting part pops up along the third direction under the action of the resetting part, changes to the first state, and blocks the workpiece to be processed behind; The workpiece to be processed enters the blanking channel, and under the guidance of the second inclined surface and the first inclined surface, slides down along the blanking channel, and slides out from the outlet of the blanking channel.

[0016] The power source for the flat tube to move out of the blanking channel is the feeding stop block. The feeding stop block pushes the distance of a flat tube forward. The flat tube moves as a whole toward the outlet of the feeding channel under the push of the feeding stop block. The flat tube closest to the outlet will push the limit part back through the convex curved surface in the width direction. The limit part changes to the second state. The flat tube enters the blanking channel from the feeding channel. The blanking channel has a first inclined plane and a second inclined plane. There is a preset distance between the first inclined plane and the second inclined plane, which is smaller than the width of the flat tube. The flat tube cannot fall horizontally from the blanking channel. Under the cover of the second inclined plane, it slides down roughly vertically along the first inclined plane to complete the blanking. Through the setting of the blanking channel, the falling direction of the flat tube can be controlled, and there is no vacuum adsorption component, the structure is simpler and more reliable, and the cost is low.

[0017] The present application can separate the flat tubes that are adsorbed to each other by setting a limit component, thereby reducing the occurrence of flat tube jams, reducing the jamming of the assembly machine, and improving the processing efficiency of the assembly machine.

[0018] It should be understood that the foregoing general description and the following detailed description are exemplary only and are not restrictive of the present application. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 A three-dimensional diagram of Example 1 of the present application; Figure 2 for Figure 1 A partial cross-sectional view of Figure 3 is a schematic diagram of Example 2; Figure 4 is a schematic diagram of the blowing hole in Example 2; Figure 5 is a schematic diagram of Example 3; Reference numerals: Feeding channel; 11-feeding platform; 12-frame; 13-guide plate; 131-flanging Accommodation space; Feeding is fast; Limiting assembly; 41-limiting portion; 42-resetting portion; 43-limiting hole; 411-limiting stopper; Blanking assembly; 51-transfer part; 52-adsorption part; 53-blanking channel; 531-first inclined surface; 532-second inclined surface; Blowing hole flat tube The accompanying drawings, which are incorporated in and constitute a part of this specification, illustrate embodiments consistent with the present application and, together with the description, serve to explain the principles of the present application. Implementation

[0020] In order to better understand the technical solution of the present application, the embodiments of the present application are described in detail below with reference to the accompanying drawings.

[0021] It should be clear that the described embodiments are only part of the embodiments of the present application, rather than all the embodiments. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in the field without creative work are within the scope of protection of the present application.

[0022] The terms used in the embodiments of the present application are only for the purpose of describing specific embodiments, and are not intended to limit the present application. The singular forms "a", "said" and "the" used in the embodiments of the present application and the appended claims are also intended to include plural forms, unless the context clearly indicates other meanings.

[0023] It should be understood that the term "and / or" used in this article is only a description of the association relationship of associated objects, indicating that there can be three relationships. For example, A and / or B can represent: A exists alone, A and B exist at the same time, and B exists alone. In addition, the character " / " in this article generally indicates that the associated objects before and after are in an "or" relationship.

[0024] It should be noted that the directional words such as "upper", "lower", "left", and "right" described in the embodiments of the present application are described at the angles shown in the accompanying drawings and should not be understood as limiting the embodiments of the present application. In addition, in the context, it is also necessary to understand that when it is mentioned that an element is connected to another element "upper" or "lower", it can not only be directly connected to another element "upper" or "lower", but also indirectly connected to another element "upper" or "lower" through an intermediate element. Example 1

[0025] A blanking device, used for assembling a heat exchanger core, comprises: a feeding channel 1, the feeding channel 1 is arranged along a first direction, the feeding channel 1 comprises a first side and a second side which are opposite to each other, an accommodating space 2 is provided between the first side and the second side of the feeding channel 1, the accommodating space 2 has a preset height, the feeding channel 1 is provided with a feeding stopper 3, the feeding stopper 3 is arranged to move along the first direction; a limiting assembly 4, and is located at the outlet of the feeding channel 1; the limiting assembly 4 has at least one along the second direction; the limiting assembly 4 comprises a limiting portion 41 and a reset portion 42. 2, the reset portion 42 acts on the limiting portion 41. When the limiting portion 41 is in the first state, the limiting portion 41 is at least partially located in the accommodating space 2. When the limiting portion 41 is in the second state, the limiting portion 41 is located outside the accommodating space 2. The reset portion 42 can change the limiting portion 41 from the second state to the first state; in this embodiment, the accommodating space 2 is a virtual space, whose length is greater than or equal to the length of the flat tube 7, the height of the accommodating space 2 is equal to the height of the flat tube 7, and the flat tube 7 can be stored therein. The height of the feeding channel 1 is greater than or equal to the height of the accommodating space 2. The flat tubes 7 will be placed in the accommodating space 2 in sequence and closely arranged, and will drop from the outlet of the feeding channel 1 in sequence. When the limiting assembly 4 is in the first state, the end of the limiting portion 41 enters the accommodating space 2 to separate the adjacent flat tubes 7. One flat tube 7 close to the outlet drops from the outlet of the feeding channel 1, and the other is blocked by the limiting assembly 4 in the accommodating space 2, waiting for the next drop. The feeding stopper 3 pushes the flat tube 7 to move a certain distance, maintaining the preload force. Under the action of the external force, the limiting portion 41 leaves the accommodating space 2 and changes to the second state. The blocked flat tube 7 is dropped from the outlet of the dropping channel 53. Under the action of the reset part 42, the limit part 41 is in the first state, completing a cycle. The limit component 4 can overcome the adsorption force between adjacent flat tubes 7, separate the adsorbed flat tubes 7, and enable the flat tubes 7 to drop from the outlet of the feeding channel 1 one by one, thereby avoiding the problem of the assembly machine getting stuck with the flat tube 7 and improving the qualified rate of the heat exchanger. In this embodiment, the first direction is the front-to-back direction of the feeding channel, with the outlet of the feeding channel being the front; the second direction is the left-to-right direction of the feeding channel.

[0026] Optionally, the limit assembly 4 is arranged on the first side of the feeding channel 1, the limit assembly 4 includes a limit hole 43 arranged along the third direction, the reset part 42 includes an elastic member arranged in the limit hole 43, the limit part 41 is arranged in the limit hole 43, the elastic member acts on the limit part 41, so that the limit part 41 can at least partially extend out of the limit hole 43, so that the limit assembly 4 is in a first state, and after being subjected to a first preset pressure in the third direction, it can at least partially retract to the limit hole 43, so that the limit assembly 4 is in a second state, and the end of the limit part 41 away from the elastic member has a hemispherical surface or a spherical surface; in this embodiment, the limit assembly 4 includes a limit hole 43 along the third direction, the third direction is the up and down direction, the limit part 41 is a ball screw, the shape of a sphere, and the reset part 42 is a spring The elastic member is arranged in the limiting hole 43, and the limiting part 41 can slide along the limiting hole 43. The first state is a natural state. The elastic member acts on the limiting part 41 to push the limiting part 41 out. The end of the limiting part 41 away from the elastic member is a spherical surface, and in other embodiments, it can be a hemispherical surface. Since the two surfaces in the width direction of the flat tube 7 are convex curved surfaces, a gap will be formed between two adjacent flat tubes 7 in the width direction. The arc-shaped end of the limiting part 41 can be inserted between the two adjacent flat tubes 7 to destroy the vacuum environment and adsorption force between the adjacent flat tubes 7, so that the adjacent flat tubes 7 are no longer adsorbed to each other. The flat tube 7 located outside can be dropped from the outlet of the dropping channel 53, while the flat tube 7 located inside is blocked by the limiting part 41. It is known that the dropping component When the material is dropped next time by the blanking assembly 5, the flat tube 7 closest to the outlet of the blanking channel 53 moves toward the outlet of the blanking channel 53 under the external force of the blanking assembly 5, and the convex surface of the flat tube 7 contacts the arc surface of the limiting portion 41, and gradually generates an extrusion force in the third direction, i.e., the up and down directions, on the limiting portion 41, and finally overcomes the pressure of the elastic member. In this embodiment, the pressure of the elastic member is defined as a first preset pressure, that is, when the elastic member receives an extrusion force exceeding the first preset pressure, the limiting portion 41 will not be located in the accommodating space 2, and the limiting portion 41 shrinks into the limiting hole 43, leaves the accommodating space 2, and changes to the second state. The flat tube 7 finally leaves the feeding channel 1 and drops from the outlet. At the same time, when the convex surface of the flat tube 7 loses contact with the arc-shaped end surface of the limiting portion 41 Instantly, the extrusion pressure disappears, and under the action of the elastic member, the limit portion 41 is reset and returns to the first state, and the feeding stopper 3 moves a certain distance toward the outlet of the feeding channel 1, so that the flat tube 7 behind maintains a certain preload force, and the outermost flat tube 7 is abutted against the limit portion 41, completing one blanking; the convex curved surface in the width direction of the flat tube 7 is cleverly utilized, and the end of the limit component 4 is designed to be a spherical surface that matches the convex curved surface. With the elastic member, the automatic separation of adjacent flat tubes 7 can be achieved, which is low in cost, and the surface of the spherical surface is smooth and will not scratch the flat tube 7, so that a single flat tube can be efficiently blanked, thereby avoiding the problem of the assembly machine jamming the flat tube and improving the qualified rate of the heat exchanger; in other embodiments, the elastic member can be replaced by other electric devices.

[0027] Optionally, an equal number of limit components 4 are provided on the first side and the second side of the feeding channel 1, and the positions of the limit components 4 on the first side and the limit components 4 on the second side correspond to each other; in the present embodiment, an equal number of limit components 4 with corresponding positions are provided on the first side and the second side, i.e., the upper and lower sides, of the feeding channel 1, for separating adjacent flat tubes 7; in other embodiments, the limit components 4 may be provided on only one side of the feeding channel 1; in other embodiments, different numbers of limit components 4 or non-corresponding positions of limit components 4 may also be provided on the first side and the second side.

[0028] Optionally, the feeding channel 1 includes a feeding table 11 and a frame 12, the frame 12 is fixedly connected to the feeding table 11, the frame 12 is provided with at least one guide plate 13, the guide plate 13 is opposite to the feeding table 11, the guide plate 13 is arranged on a first side of the feeding channel 1, the feeding table 11 is arranged on a second side of the feeding channel 1, the feeding channel 1 also includes a feeding stopper 3, the feeding stopper 3 is slidably connected to the feeding table 11, the feeding stopper 3 has an end portion higher than the plane of the feeding table 11, and can be moved along the feeding channel Channel 1 moves to the limit assembly 4; in the present embodiment, the feeding channel 1 is mainly formed by a plurality of guide plates 13 to form a first side, i.e., the upper part of the feeding channel 1, and a feeding table 11 forms a lower part of the feeding channel 1, i.e., the second side, and a feeding trough is provided on the feeding table 11, and a feeding stopper is quickly connected to the feeding trough, and an upper end portion of the feeding stopper 3 is higher than the feeding table 11, and is used to push the flat tube 7 to move toward the outlet of the feeding channel 1; in the present embodiment, the guide plate is also provided with an upward flange 131 to facilitate the flat tube to enter the feeding channel.

[0029] Optionally, it also includes a blanking assembly 5, which includes a transfer portion 51 that can move along the second direction, the transfer portion 51 is provided with an adsorption portion 52, the adsorption portion 52 is connected to a vacuum generator, and the transfer portion 51 can generate a third preset pressure along the second direction, and the third preset pressure is greater than the first preset pressure or the second preset pressure; in this embodiment, the blanking assembly 5 is a vacuum adsorption assembly, including a transfer portion 51, and the transfer portion 51 is a guide rod that can move back and forth, and the end of the guide rod is provided with an adsorption portion 52, i.e., a suction cup, which is connected to the vacuum generator. When working, the guide rod drives the suction cup to approach the flat tube 7 closest to the outlet, and the suction cup generates negative pressure to firmly adsorb the flat tube 7. Further, The guide rod drives the adsorbed flat tube 7 to move toward the exit of the feeding channel 1, and the limiting part 41 moves into the limiting hole 43 and leaves the accommodating space 2. The adsorbed flat tube 7 is moved out. After reaching the blanking position, the suction cup stops adsorption, and the flat tube 7 falls down, completing one blanking operation. Through the suction of the suction cup and the transfer of the guide rod, the flat tube 7 can be protected to the greatest extent and will not be damaged during the blanking process, thereby improving the quality of the product. In other embodiments, other blanking methods can be adopted. In this embodiment, the third preset pressure is the traction force driven by the guide rod to drive the flat tube 7 outside the feeding channel 1, and the traction force is sufficient to enable the flat tube 7 to overcome the obstruction of the limiting part 41 and push the limiting part 41 out of the accommodating space 2. Example 2

[0030] The difference from Example 1 is that the blanking assembly 5 of this embodiment is no longer a vacuum adsorption assembly. The blanking assembly 5 of this embodiment includes a blanking channel 53, which is arranged at the outlet of the feeding channel 1. The blanking channel 53 includes a first inclined surface 531 and a second inclined surface 532. The first inclined surface 531 and the second inclined surface 532 have a preset distance and a smooth surface. The blanking channel 53 is inclined as a whole and also includes a blanking outlet, which is arranged at the lower part of the blanking channel 53. In this embodiment, the power source for the flat tube 7 to move out of the blanking channel 53 is the feeding stopper. The feeding stopper 3 pushes the flat tube 7 forward by a distance. The flat tube 7 is pushed by the feeding stopper 3 to move toward the outlet of the feeding channel 1 as a whole. The flat tube 7 moves to the outlet, and the flat tube 7 closest to the outlet will push the limiting part 41 back through the convex surface in the width direction, and the limiting part 41 changes to the second state. The flat tube 7 enters the blanking channel 53 from the feeding channel 1. The blanking channel 53 has a first inclined surface 531 and a second inclined surface 532. There is a preset distance between the first inclined surface 531 and the second inclined surface 532, and the distance is smaller than the width of the flat tube 7. The flat tube 7 cannot fall horizontally from the blanking channel 53. Under the cover of the second inclined surface 532, it slides down roughly vertically along the first inclined surface 531 to complete the blanking. Through the setting of the blanking channel 53, the falling direction of the flat tube 7 can be controlled, and there is no vacuum adsorption component, the structure is simpler and more reliable, and the cost is low.

[0031] Optionally, the feeding channel 1 is provided with a blowing hole 6, and the blowing hole 6 is connected to a blowing device, and the blowing device is configured to intermittently or continuously blow airflow to the feeding channel 1; in this embodiment, a blowing device and a blowing hole 6 can be provided on the upper and lower sides of the feeding channel 1, and when the flat tube 7 is no longer blocked by the limiting component 4, the blowing device blows air to transfer the flat tube 7 to the blanking channel 53, completes the blanking, prevents the flat tube 7 from being trapped in the feeding channel 1, and improves the efficiency of the blanking. Example 3

[0032] The difference from Example 1 is that the limiting portion 41 includes a limiting stopper 411, which is hingedly arranged on the first side and / or the second side of the feeding channel 1, and the limiting stopper 411 is connected to a reset portion 42, and the reset portion 42 includes a torsion spring, which acts on the limiting stopper 411. When the limiting stopper 411 is in the first state under the action of the reset torsion spring, at least part of the limiting stopper 411 enters the feeding channel 1, and after the limiting stopper 411 is subjected to a second preset pressure in the third direction, the limiting stopper 411 changes to the second state, and the part of the limiting stopper 411 entering the feeding channel 1 is reduced or retracted; in this embodiment, the limiting portion 41 is a limiting stopper 41 1, is hinged on the lower side of the feeding channel 1 and is connected with a torsion spring. When the flat tube 7 closest to the outlet of the feeding channel 1 is acted upon by the suction cup and the guide rod of the blanking assembly 5 and moves toward the outlet of the feeding channel 1, the width direction of the flat tube 7 gradually squeezes the limit stopper 411, and the limit stopper 411 changes from a large-angle state in the first state to a small-angle state or horizontal state in the second state. After the flat tube 7 leaves, it automatically changes to a large-angle state in the first state under the action of the torsion spring to block the flat tube 7 behind and complete a blanking operation. The limit stopper 411 can also be used to control the blanking of a single flat tube 7 to avoid being adsorbed together, thereby causing the assembly machine to jam and producing defective products. Example 4

[0033] The difference from the third embodiment is that the blanking assembly 5 in this embodiment is the blanking channel 53 and the first inclined surface 531 and the second inclined surface 532 in the second embodiment. Example 5

[0034] The present application also discloses an assembly machine, a blanking device according to any one of Embodiment 1, Embodiment 2, Embodiment 3, and Embodiment 4, the blanking device comprising: A feeding channel 1, which is arranged along a first direction, comprises a first side and a second side which are opposite to each other, and a receiving space 2 is provided between the first side and the second side of the feeding channel 1, and the receiving space 2 has a preset height, and the feeding channel 1 is provided with a feeding stopper 3, and the feeding stopper 3 is arranged to move along the first direction; a limiting assembly 4 is arranged at the outlet of the feeding channel 1; the limiting assembly 4 has at least one along the second direction; the limiting assembly 4 comprises a limiting portion 41 and a resetting portion 42, and the resetting portion 42 acts on the limiting portion 41, and when the limiting portion 41 is in a first state, the limiting portion 41 is at least partially located in the receiving space 2, and when the limiting portion 41 is in a second state, the limiting portion 41 is located outside the receiving space 2, and the resetting portion 42 can change the limiting portion 41 from the second state to the first state; through the blanking device, the mutual adsorption problem of the flat tube 7 during the blanking process is solved. Example 6

[0035] like Figure 1-2 As shown, the present application also discloses a blanking method for blanking the flat tube 7 during the assembly process of the heat exchanger, comprising the following steps: The workpiece to be processed is placed in the accommodating space 2 of the feeding channel 1, and the reset portion 42 acts on the limiting portion 41. The limiting portion 41 is in the first state, and the limiting portion 41 at least partially enters the accommodating space 2 and blocks the workpiece to be processed from passing through the feeding channel 1; The limiting portion 41 is in the second state, does not enter the accommodating space 2, and the workpiece to be processed passes through the outlet of the feeding channel 1; Under the action of the reset portion 42, after the outlet of the feed channel 1 of the workpiece to be processed, the limiting portion 41 is in the first state; the feed channel 1, the feed channel 1 is arranged along the first direction, the feed channel 1 includes a first side and a second side in relative position, there is a accommodating space 2 between the first side and the second side of the feed channel 1, the accommodating space 2 has a preset height, the feed channel 1 is provided with a feed stopper 3, and the feed stopper 3 is arranged to move along the first direction; the limiting component 4 is located at the outlet of the feed channel 1; the limiting component 4 has at least one along the second direction; the limiting component 4 includes a limiting portion 41 and a reset portion 42, the reset portion 42 acts on the limiting portion 41, when the limiting portion 41 is in the first state, the limiting portion 41 is at least partially located in the accommodating space 2, when the limiting portion 41 is in the second state, the limiting portion 41 is located outside the accommodating space 2, the reset portion 42 can change the limiting portion 41 from the second state to the first state; in this embodiment, the accommodating space 2 is a virtual space, whose length is greater than or equal to the length of the flat tube 7, and the height of the accommodating space 2 is equal to the flat tube 7 The height of the feeding channel 1 is greater than or equal to the height of the accommodating space 2, and the flat tubes 7 will be precisely arranged in sequence and placed in the accommodating space 2, and will be dropped from the outlet of the feeding channel 1 in sequence. When the limiting component 4 is in the first state, the end of the limiting part 41 enters the accommodating space 2 to separate the adjacent flat tubes 7. One flat tube 7 close to the outlet drops from the outlet of the feeding channel 1, and the other is blocked by the limiting component 4 in the accommodating space 2, waiting for the next drop. The feeding stopper 3 pushes the flat tube 7 to move The limiting part 41 moves a certain distance to maintain the pre-tightening force. Under the action of external force, the limiting part 41 leaves the accommodating space 2 and changes to the second state. The blocked flat tube 7 is discharged from the outlet of the discharge channel 53. Under the action of the resetting part 42, the limiting part 41 is in the first state, completing a cycle. The limiting component 4 can overcome the adsorption force between adjacent flat tubes 7, separate the adsorbed flat tubes 7, and enable the flat tubes 7 to be discharged from the outlet of the feeding channel 1 one by one, thereby avoiding the problem of the assembly machine jamming the flat tube 7 and improving the qualified rate of the heat exchanger.

[0036] Optionally, after the limiting portion 41 blocks the workpiece to be processed from passing through the feeding channel 1, the following steps are further included: The adsorption part 52 starts negative pressure adsorption of a workpiece near the outlet of the feeding channel 1, and the transfer part 51 drives the workpiece to be processed to move out of the feeding channel 1 along the second direction; The adsorption portion 52 drives the workpiece to be processed to overcome the pressing force of the limiting portion 41, and the spherical or hemispherical surface of the limiting portion 41 slides along the curved surface in the width direction of the workpiece to be processed, and the limiting portion 41 changes from the first state to the second state, and the adsorbed workpiece to be processed escapes from the feeding channel 1. The limiting portion 41 pops up along the third direction under the action of the resetting portion 42, enters the accommodating space 2, and changes to the first state. The spherical or hemispherical end of the limiting portion 41 contacts the curved surface in the width direction of the workpiece to be processed closest to the outlet of the feeding channel 1, blocking the workpiece to be processed behind, and at the same time, the feeding stopper 3 pushes forward a distance of a first preset length; The transfer part 51 transfers the workpiece to be processed to the assembly structure, the adsorption part 52 stops adsorption, and the workpiece to be processed falls; in this embodiment, the limiting component 4 includes a limiting hole 43 along the third direction, the third direction is the up and down direction, the reset part 42 is an elastic member such as a spring, which is arranged in the limiting hole 43, and the limiting part 41 can slide along the limiting hole 43. The first state is a natural state, the elastic member acts on the limiting part 41 to push the limiting part 41 out, and the end of the limiting part 41 away from the elastic member is a spherical surface, which can be a hemispherical surface in other embodiments. Since the two surfaces of the flat tube 7 in the width direction are convex curved surfaces, the two adjacent flat tubes 7 in the width A gap will be formed in the direction, and the arc-shaped end of the limiting portion 41 can be inserted between two adjacent flat tubes 7, thereby destroying the vacuum environment and adsorption force between the adjacent flat tubes 7, so that the adjacent flat tubes 7 are no longer adsorbed to each other, and the flat tube 7 located outside can be dropped from the outlet of the drop channel 53, while the flat tube 7 located inside is blocked by the limiting portion 41 until the next drop of the drop component 5, the flat tube 7 closest to the outlet of the drop channel 53 moves toward the outlet of the drop channel 53 under the external force of the drop component 5, the convex surface of the flat tube 7 contacts the arc surface of the limiting portion 41, and gradually generates a third direction on the limiting portion 41 That is, the extrusion force in the up and down directions eventually overcomes the pressure of the elastic member. In this embodiment, the pressure grams of the elastic member is defined as the first preset pressure, that is, when the elastic member receives an extrusion force exceeding the first preset pressure, the limiting portion 41 will not be located in the accommodating space 2, and the limiting portion 41 shrinks toward the limiting hole 43, leaves the accommodating space 2, and changes to the second state. The flat tube 7 eventually leaves the feeding channel 1 and falls from the outlet. At the same time, when the convex surface of the flat tube 7 loses contact with the arc-shaped end face of the limiting portion 41, the extrusion force disappears. Under the action of the elastic member, the limiting portion 41 is reset and changes to the first state again, and the feeding stopper 3 feeds the material. The outlet of the channel 1 moves a certain distance, so that the flat tube 7 behind maintains a certain pre-tightening force, and the outermost flat tube 7 is pressed against the limiting portion 41, completing a blanking operation; the convex curved surface in the width direction of the flat tube 7 is cleverly utilized, and the end of the limiting component 4 is designed to be a spherical surface that matches the convex curved surface. With the elastic member, the automatic separation of adjacent flat tubes 7 can be achieved, which is low in cost, and the surface of the spherical surface is smooth, which will not scratch the flat tube 7, and can efficiently achieve the blanking of a single flat tube 7, thereby avoiding the problem of the assembly machine blocking the flat tube 7 and improving the qualified rate of the heat exchanger; in other embodiments, the elastic member can be replaced by other electric devices; In this embodiment, the blanking component 5 is a vacuum adsorption component, including a transfer part 51, and the transfer part 51 is a guide rod that can move forward and backward. The end of the guide rod is provided with an adsorption part 52, i.e., a suction cup, which is connected to a vacuum generator. When working, the guide rod drives the suction cup to approach the flat tube 7 closest to the outlet, and the suction cup generates negative pressure to firmly adsorb the flat tube 7. Further, the guide rod drives the adsorbed flat tube 7 to move toward the outlet of the feeding channel 1, and the limiting part 41 moves into the limiting hole 43, leaving the accommodating space 2, and the adsorbed flat tube 7 is moved out. After reaching the blanking position, the suction cup stops adsorption, and the flat tube 7 falls down, completing a blanking operation. Through the suction of the suction cup and the transfer of the guide rod, the flat tube 7 can be protected to the greatest extent and will not be damaged during the blanking process, thereby improving the quality of the product. In other embodiments, other blanking methods can be adopted. In this embodiment, the first preset length is the thickness of the flat tube 7. Example 7

[0037] like Figure 3-4 As shown, in this embodiment, after the limiting portion 41 blocks the workpiece to be processed from passing through the feeding channel 1, the following steps are further included: The feeding stopper 3 moves forward by a first preset length, and the workpiece to be processed moves along the feeding channel 1. The workpiece to be processed closest to the blanking channel 53 overcomes the pressing force of the limiting portion 41, and the limiting portion 41 changes from the first state to the second state. The workpiece to be processed closest to the outlet of the blanking channel 53 escapes from the feeding channel 1. The limiting portion 41 pops up along the third direction under the action of the resetting portion 42 and changes to the first state, blocking the workpiece to be processed behind. The workpiece to be processed enters the blanking channel 53, and under the guidance of the second inclined surface 532 and the first inclined surface 531, slides down along the blanking channel 53, and slides out from the outlet of the blanking channel 53; The blanking assembly 5 of the present embodiment is no longer a vacuum adsorption assembly. The blanking assembly 5 of the present embodiment includes a blanking channel 53, which is arranged at the outlet of the feeding channel 1. The blanking channel 53 includes a first inclined surface 531 and a second inclined surface 532. The first inclined surface 531 and the second inclined surface 532 have a preset distance and a smooth surface. The blanking channel 53 is inclined as a whole, and also includes a blanking outlet, which is arranged at the lower part of the blanking channel 53. In the present embodiment, the power source for the flat tube 7 to move out of the blanking channel 53 is the feeding stopper. The feeding stopper 3 pushes the flat tube 7 forward by a distance. The flat tube 7 moves toward the outlet of the feeding channel 1 as a whole under the push of the feeding stopper 3. The flat tube 7 near the outlet will push the limiting part 41 back through the convex surface in the width direction, and the limiting part 41 changes to the second state. The flat tube 7 enters the blanking channel 53 from the feeding channel 1. The blanking channel 53 has a first inclined surface 531 and a second inclined surface 532. There is a preset distance between the first inclined surface 531 and the second inclined surface 532, and the distance is smaller than the width of the flat tube 7. The flat tube 7 cannot fall horizontally from the blanking channel 53. Under the cover of the second inclined surface 532, it slides down roughly vertically along the first inclined surface 531 to complete the blanking. Through the setting of the blanking channel 53, the falling direction of the flat tube 7 can be controlled, and there is no vacuum adsorption component, the structure is simpler and more reliable, and the cost is low.

[0038] The above description is only the preferred embodiment of the present application and is not intended to limit the present application. For those skilled in the art, the present application may have various modifications and variations. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present application shall be included in the protection scope of the present application.

Claims

1. A blanking device for assembling a heat exchanger core, characterized in that: include: A feeding channel (1), the feeding channel (1) being arranged along the first direction, the feeding channel (1) comprising a first side and a second side which are opposite to each other, an accommodating space (2) being provided between the first side and the second side of the feeding channel (1), the accommodating space (2) having a preset height, the feeding channel (1) being provided with a feeding stopper (3), the feeding stopper (3) being arranged to move along the first direction; A limit assembly (4) is located at the outlet of the feeding channel (1); the limit assembly (4) has at least one limit assembly (4) along the second direction; The limiting assembly (4) comprises a limiting portion (41) and a resetting portion (42); the resetting portion (42) acts on the limiting portion (41); when the limiting portion (41) is in a first state, the limiting portion (41) is at least partially located in the accommodating space (2); when the limiting portion (41) is in a second state, the limiting portion (41) is located outside the accommodating space (2); and the resetting portion (42) is capable of changing the limiting portion (41) from the second state to the first state.

2. The blanking device according to claim 1, characterized in that: The limiting assembly (4) is arranged on a first side of the feeding channel (1), the limiting assembly (4) comprises a limiting hole (43) arranged along a third direction, the resetting portion (42) comprises an elastic member arranged in the limiting hole (43), the limiting portion (41) is arranged in the limiting hole (43), the elastic member acts on the limiting portion (41), so that the limiting portion (41) can at least partially extend out of the limiting hole (43), so that the limiting assembly (4) is in a first state, and after being subjected to a first preset pressure in the third direction, it can at least partially retract into the limiting hole (43), so that the limiting assembly (4) is in a second state, and the end of the limiting portion (41) away from the elastic member has a hemispherical surface or a spherical surface.

3. The blanking device according to claim 2, characterized in that: An equal number of the limiting components (4) are provided on the first side and the second side of the feeding channel (1), and the positions of the limiting components (4) on the first side and the limiting components (4) on the second side correspond to each other.

4. The blanking device according to claim 3, characterized in that: The feeding channel (1) comprises a feeding table (11) and a frame (12), wherein the frame (12) is fixedly connected to the feeding table (11), and the frame (12) is provided with at least one guide plate (13), wherein the guide plate (13) is opposite to the feeding table (11), and the guide plate (13) is arranged on a first side of the feeding channel (1), and the feeding table (11) is arranged on a second side of the feeding channel (1). The feeding channel (1) further comprises a feeding stopper (3), wherein the feeding stopper (3) is slidably connected to the feeding table (11), and the feeding stopper (3) has an end portion higher than the plane of the feeding table (11), and can be moved along the feeding channel (1) to the limiting assembly (4).

5. The blanking device according to claim 1, characterized in that: The limiting portion (41) comprises a limiting stopper (411), the limiting stopper (411) being hingedly arranged on a first side and / or a second side of the feeding channel (1), the limiting stopper (411) being connected to a reset portion (42), the reset portion (42) comprising a torsion spring, the torsion spring acting on the limiting stopper (411), when the limiting stopper (411) is in a first state under the action of the reset torsion spring, at least a portion of the limiting stopper (411) enters the feeding channel (1), and after the limiting stopper (411) is subjected to a second preset pressure in a third direction, the limiting stopper (411) changes to a second state, and the portion of the limiting stopper (411) entering the feeding channel (1) is reduced or retracted.

6. The blanking device according to claim 3 or 5, characterized in that: The device further comprises a blanking assembly (5), wherein the blanking assembly (5) comprises a transfer portion (51) capable of moving along a second direction, the transfer portion (51) being provided with an adsorption portion (52), the adsorption portion (52) being connected to a vacuum generator, and the transfer portion (51) being capable of generating a third preset pressure along the second direction, the third preset pressure being greater than the first preset pressure or the second preset pressure.

7. The blanking device according to claim 3 or 5, characterized in that: The invention also comprises a blanking assembly (5), wherein the blanking assembly (5) comprises a blanking channel (53), wherein the blanking channel (53) is arranged at the outlet of the feeding channel (1), wherein the blanking channel (53) comprises a first inclined surface (531) and a second inclined surface (532), wherein the first inclined surface (531) and the second inclined surface (532) have a preset spacing and a smooth surface, and the blanking channel (53) is inclined as a whole, and further comprises a blanking outlet, wherein the blanking outlet is arranged at the lower part of the blanking channel (53).

8. The blanking device according to claim 7, characterized in that: The feeding channel (1) is provided with a blowing hole (6), the blowing hole (6) is connected to a blowing device, and the blowing device is configured to intermittently or continuously blow airflow to the feeding channel (1).

9. An assembly machine, comprising a blanking device, characterized in that: The blanking device comprises: A feeding channel (1), the feeding channel (1) being arranged along the first direction, the feeding channel (1) comprising a first side and a second side which are opposite to each other, an accommodating space (2) being provided between the first side and the second side of the feeding channel (1), the accommodating space (2) having a preset height, the feeding channel (1) being provided with a feeding stopper (3), the feeding stopper (3) being arranged to move along the first direction; A limit assembly (4) is located at the outlet of the feeding channel (1); the limit assembly (4) has at least one limit assembly (4) along the second direction; The limiting assembly (4) comprises a limiting portion (41) and a resetting portion (42); the resetting portion (42) acts on the limiting portion (41); when the limiting portion (41) is in a first state, the limiting portion (41) is at least partially located in the accommodating space (2); when the limiting portion (41) is in a second state, the limiting portion (41) is located outside the accommodating space (2); and the resetting portion (42) is capable of changing the limiting portion (41) from the second state to the first state.

10. A blanking method for blanking flat tubes during the assembly process of a heat exchanger, characterized in that: The following steps are involved: The workpiece to be processed is placed in the accommodating space (2) of the feeding channel (1), the reset portion (42) acts on the limiting portion (41), the limiting portion (41) is in a first state, the limiting portion (41) at least partially enters the accommodating space (2) and blocks the workpiece to be processed from passing through the feeding channel (1); The limiting portion (41) is in a second state and does not enter the accommodating space (2), and the workpiece to be processed passes through the outlet of the feeding channel (1); Under the action of the resetting portion (42), after the outlet of the workpiece feeding channel (1) is reached, the limiting portion (41) is in the first state.

11. The blanking method according to claim 10, characterized in that: After the limiting portion (41) blocks the workpiece to be processed from passing through the feeding channel (1), the following steps are further included: The adsorption portion (52) starts negative pressure adsorption of a workpiece near the outlet of the feeding channel (1), and the transfer portion (51) drives the workpiece to be processed to move along a second direction toward the outside of the feeding channel (1); The adsorption portion (52) drives the workpiece to be processed to overcome the pressing force of the limiting portion (41), and the spherical surface or hemispherical surface of the limiting portion (41) slides along the curved surface in the width direction of the workpiece to be processed, and the limiting portion (41) changes from the first state to the second state, and the adsorbed workpiece to be processed escapes from the feeding channel (1). Under the action of the resetting portion (42), the limiting portion (41) pops up along the third direction and enters the accommodating space (2), changing to the first state, and the spherical or hemispherical end of the limiting portion (41) contacts the curved surface in the width direction of the workpiece to be processed closest to the outlet of the feeding channel (1), thereby blocking the workpiece to be processed behind, and at the same time, the feeding stopper (3) pushes forward a first preset length; The transfer part (51) transfers the workpiece to be processed to the assembly structure, and the adsorption part (52) stops adsorption, and the workpiece to be processed falls.

12. The blanking method according to claim 10, characterized in that: After the limiting portion (41) blocks the workpiece to be processed from passing through the feeding channel (1), the following steps are further included: The feed stopper (3) moves forward a distance of a first preset length, the workpiece to be processed moves along the feed channel (1), the workpiece to be processed closest to the blanking channel (53) overcomes the pressing force of the limiting portion (41), the limiting portion (41) changes from the first state to the second state, the workpiece to be processed closest to the outlet of the blanking channel (53) escapes from the feed channel (1), and the limiting portion (41) pops out along the third direction under the action of the reset portion (42), changes to the first state, and blocks the workpiece to be processed behind; The workpiece to be processed enters the blanking channel (53), and under the guidance of the second inclined surface (532) and the first inclined surface (531), slides down along the blanking channel (53), and slides out from the outlet of the blanking channel (53).

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