A port processing device for refrigeration copper tube production

Abstract

The present invention discloses a port processing device for the production of refrigeration copper tubes, which relates to the technical field of copper tube processing. The present invention aims to solve the problem of increased pressure drop caused by flow resistance points appearing at the connection parts when the shrinking end and the flaring end are connected; continuous shrinkage and expansion processing of the refrigeration copper tube is realized based on a composite dynamic shrinkage and expansion component combined with a propulsion spinning component, wherein dynamic expansion is realized by combining a multi-stage composite expansion die with a hydraulic servo system, and wrinkling and cracking in the traditional expansion process are avoided by precise control of pressure and displacement, and spinning forming is combined with the shrinking process, and radial pressure applied to the refrigeration copper tube port is realized by propulsion of the spinning component, thereby realizing non-cutting processing; under the combination of the two, continuous and unobstructed shrinkage and expansion processing is realized in the processing process of the refrigeration copper tube port, and relevant parameters can be dynamically adjusted to match the connection of the shrinkage and expansion to avoid the problem of flow resistance points appearing at the connection parts and subsequent increased pressure drop.

Description

Technical Field

[0001] The invention relates to the technical field of copper tube processing, and in particular to a port processing device for producing refrigeration copper tubes. Background Art

[0002] In the field of refrigeration equipment manufacturing, copper tubes serve as the core carrier of the refrigerant circulation system. The quality of their port shrinking and flaring processing directly affects the pipeline sealing and heat exchange efficiency. On the one hand, it is to adapt to the connection requirements. Since copper tubes in the refrigeration system often need to be connected to other components (aluminum tubes, valves, or other copper tubes), the port diameter is reduced / enlarged after shrinking / flaring, which facilitates insertion or nesting connection. On the other hand, it can improve the sealing performance. The shrinking / flaring process can also optimize the port shape and reduce the risk of leakage.

[0003] However, for high-precision refrigeration systems, the thin walls of the refrigeration copper tubes are easily deformed when subjected to excessive force. In the prior art, a necking process is used to complete the necking of the tube ends, and then a non-cutting flaring is used to complete the flaring of the connectors. However, when the necked-flared ends are connected, flow resistance points may easily appear in the connection section due to differences in processing technology. That is, the flow resistance of the refrigerator generates "turbulence" at the connection between the necked end and the flared end, resulting in an increase in pressure drop. For this reason, the present application proposes a solution that can complete the processing of the refrigeration copper tube ports with dynamic necking and flaring matching during the necking and flaring processing. Summary of the Invention

[0004] The purpose of the present invention is to provide a port processing device for the production of refrigeration copper tubes, which is used to solve the problem of increased pressure drop caused by flow resistance points at the connection parts when the shrinking end and the flaring end are connected.

[0005] The object of the present invention can be achieved through the following technical solutions: A port processing device for the production of refrigeration copper tubes, comprising a base plate and a bracket, wherein both ends of the base plate are respectively provided with a feeding and unloading mechanism for continuous loading and unloading of the copper tubes to be processed and a composite dynamic shrinking and expanding component for shrinking and expanding the copper tubes to be processed, the bracket is rotatably mounted with a symmetrically arranged rotating seat, the inner ring side of the rotating seat is provided with an adapter groove for positioning the copper tubes to be processed, the two adapter grooves at the top are aligned with the feeding and unloading mechanism and are used for continuous loading and unloading of the copper tubes to be processed, and the two adapter grooves at the bottom are aligned with the composite dynamic shrinking and expanding component and are used for shrinking and expanding the copper tubes to be processed; the composite dynamic shrinking and expanding component comprises a horizontally arranged hydraulic cylinder 1 and an oil cylinder arranged to rotate obliquely, the output end of the oil cylinder is connected to a spinning block for dynamic shrinking of the copper tube to be processed through a swing frame, the output end of the hydraulic cylinder 1 is connected to a composite expanding mold, the composite expanding mold comprises a continuously connected calibration section, a pre-expansion section and a forming section to realize dynamic expanding of the copper tube to be processed.

[0006] It is further configured as follows: a shrinkage and expansion box and a pushing seat are respectively provided on both sides of the upper end of the base plate, the composite dynamic shrinkage and expansion component is arranged in the shrinkage and expansion box, and a pushing port aligned with the adapter groove is opened on the inner ring side of the pushing seat, and the pushing seat is provided with a propulsion spinning component through the pushing port at the bottom.

[0007] It is further configured as follows: the propulsion spinning assembly includes a horizontally arranged hydraulic cylinder 2 and a motor 1, the motor 1 is arranged at the output end of the hydraulic cylinder 2, the output end of the motor 1 is rotatably connected to a push column that is slidably connected to a push seat, and the inner end of the push column is connected to a push support plate that matches the inner cavity of the copper tube to be processed.

[0008] It is further configured as follows: the push support plate includes a chuck and a radial shifting claw adapted to the inner wall of the copper tube to be processed; the radial shifting claw moves radially outside the chuck and clamps the inner wall of the copper tube to be processed.

[0009] It is further configured as follows: a rotating support rod is installed in the middle of the swing frame, a swing support rod is installed at the lower end of the swing frame, the output end of the oil cylinder is rotatably connected to the rotating support rod and the bottom of the cylinder is rotatably connected to the shrinkage and expansion box, and the swing support rod is rotatably connected to the shrinkage and expansion box.

[0010] It is further configured as follows: the feeding and unloading mechanism includes a feeding cylinder arranged outside the pushing port corresponding to the upper end of the pushing seat, a hydraulic cylinder three is installed outside the feeding cylinder, and the output end of the hydraulic cylinder three extends to the feeding cylinder and is installed with a pushing plate for horizontal feeding of the copper tube to be processed.

[0011] It is further configured as follows: a feed concave wheel is rotatably installed above the feed cylinder near the pusher seat, and a friction strip is installed in the groove of the feed concave wheel for continuously feeding the copper tube to be processed.

[0012] It is further configured as follows: a connecting plate is installed between the two transfer seats, one of the transfer seats is provided with a driven gear ring on its outer shell, a second motor is installed on the bracket, and a driving gear meshing with the driven gear ring is installed on the output end of the second motor.

[0013] The present invention has the following beneficial effects:

[0014] The present invention addresses the problem of increased pressure drop caused by flow resistance points appearing at the connection parts when the necking and flaring ends are connected; based on the composite dynamic shrinking and expansion component combined with the propulsion spinning component, continuous shrinking and expansion processing of the refrigeration copper tube is achieved, wherein a multi-stage composite flaring die is combined with a hydraulic servo system to achieve dynamic flaring, and the wrinkling and cracking phenomena in the traditional flaring process are avoided through the precise control of pressure and displacement. The spinning forming is combined with the necking process, and the radial pressure applied to the refrigeration copper tube port is achieved by the propulsion spinning component, thereby realizing non-cutting processing; with the combination of the two, continuous and unobstructed shrinking and expansion processing is achieved during the processing of the refrigeration copper tube port, and the function of dynamically adjustable relevant parameters avoids the problem of flow resistance points appearing at the connection parts and the subsequent increase in pressure drop;

[0015] During the necking process of the copper tube to be processed, the oil cylinder can provide position adjustment for the spinning block by the rotating support rod, and complete the basic steering by the swing support rod, so as to accurately adjust the necking diameter of the spinning block and the copper tube to be processed, and finally realize the dynamic necking adjustment process according to the required necking diameter. The whole dynamic necking adjustment process can freely adapt to the processing of copper tubes with different wall thicknesses, and greatly shorten the synchronous processing time of large quantities of copper tubes, thereby improving the port processing efficiency of refrigeration copper tubes;

[0016] During the flaring process, a diameter measuring sensor is embedded in the calibration section, which can measure the inner diameter of the inner wall of the pipe port after flaring, so as to judge whether the current flaring is accurate or not. For the shrinkage and expansion processing of the copper pipe port to be processed, a multi-stage composite flaring die is used to precisely control the pressure and displacement to avoid wrinkling and cracking that are prone to occur in traditional flaring processes. Therefore, combined with the description of the above point 2, it can avoid the problem of flow resistance points at the connection parts of the refrigeration copper pipe, which leads to an increase in subsequent pressure drop and affects the refrigeration effect. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the following briefly introduces the drawings required for use in the embodiments or the description of the prior art. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.

[0018] Figure 1 It is a structural schematic diagram of the present invention;

[0019] Figure 2 It is a rear view structural schematic diagram of the present invention;

[0020] Figure 3 This is a diagram of the installation structure of the composite dynamic shrinkage and expansion component of the present invention;

[0021] Figure 4 This is a structural diagram of the composite dynamic shrinking and expanding component of the present invention;

[0022] Figure 5 This is a schematic diagram of the docking of the composite dynamic shrinkage and expansion assembly of the present invention;

[0023] Figure 6 It is a structural schematic diagram of the feeding and unloading mechanism of the present invention;

[0024] Figure 7 It is a structural diagram of the feeding mechanism of the present invention;

[0025] Figure 8 It is a front view of the feeding mechanism of the present invention;

[0026] Figure 9 It is a schematic diagram of the feeding state of the present invention.

[0027] In the figure: 1. Base plate; 2. Bracket; 3. Shrinking and expanding box; 4. Pushing seat; 5. Feeding barrel; 6. Rotating seat; 7. Copper tube to be processed; 8. Hydraulic cylinder 1; 9. Connecting plate; 10. Adapter groove; 11. Calibration section; 12. Pre-expansion section; 13. Forming section; 14. Diameter measuring sensor; 15. Oil cylinder; 16. Swinging frame; 17. Spinning block; 18. Hydraulic cylinder 2; 19. Motor 1; 20. Pushing support plate; 21. Pushing port; 22. Pushing column; 23. Swinging support rod; 24. Rotating support rod; 25. Driven gear ring; 26. Feed cam; 27. Friction strip; 28. Hydraulic cylinder 3; 29. Pushing plate. DETAILED DESCRIPTION

[0028] The technical solutions of the present invention will be clearly and completely described below in conjunction with the embodiments. Obviously, the embodiments described are only some embodiments of the present invention, not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0029] Example 1: To address the problem of increased pressure drop caused by flow resistance points appearing at the connection between the constricted end and the flared end, the following technical solution is proposed:

[0030] Reference Figures 1-9As shown, in this embodiment, a port processing device for the production of refrigeration copper tubes includes a base plate 1 and a bracket 2. Both ends of the base plate 1 are respectively provided with a feeding and unloading mechanism for continuous loading and unloading of the copper tube 7 to be processed and a composite dynamic shrinkage and expansion component for shrinkage and expansion processing of the copper tube 7 to be processed. A symmetrically arranged rotating seat 6 is rotatably mounted on the bracket 2. An adapting groove 10 for positioning the copper tube 7 to be processed is provided on the inner ring side of the rotating seat 6, and the arc formed by the end points of the adapting groove 10 is a superior arc. The two adapting grooves 10 at the top are aligned with the feeding and unloading mechanism and are used for continuous loading and unloading of the copper tube 7 to be processed. The two adapting grooves 10 at the bottom are aligned with the composite dynamic shrinkage and expansion component and are used for shrinkage and expansion processing of the copper tube 7 to be processed.

[0031] Reference Figure 3 、 Figure 4 and Figure 5 As shown, the composite dynamic shrinking and expanding component includes a horizontally arranged hydraulic cylinder 8 and an oil cylinder 15 arranged to be tilted and rotated. The output end of the oil cylinder 15 is connected to a spinning block 17 for dynamic shrinking of the copper tube 7 to be processed through a swing frame 16. The output end of the hydraulic cylinder 8 is connected to a composite expanding die. The composite expanding die includes a continuously connected calibration section 11, a pre-expansion section 12 and a forming section 13 to realize the dynamic expansion of the copper tube 7 to be processed. The calibration section is embedded with a diameter measuring sensor, which can measure the inner diameter of the inner wall of the tube port after expansion, so as to make a judgment on whether the current expansion is accurate or not. For the expansion processing of the port of the copper tube 7 to be processed, the hydraulic cylinder 8 drives the composite expanding die to be pressed into the port of the copper tube 7 to be processed, and uses the pre-expansion section 12, the forming section 13 and the calibration section 11 to accurately expand the port, that is, the multi-section composite expanding die is used to precisely control pressure and displacement to avoid wrinkling and cracking that are prone to occur in the traditional expansion process.

[0032] Reference Figure 3-Figure 5 As shown, a shrinkage and expansion box 3 and a pushing seat 4 are respectively provided on both sides of the upper end of the bottom plate 1, and the composite dynamic shrinkage and expansion component is arranged in the shrinkage and expansion box 3, and the inner ring side of the pushing seat 4 is provided with a pushing port 21 aligned with the adapting groove 10, and the pushing seat 4 is provided with a propulsion spinning component through the pushing port 21 at the bottom; the propulsion spinning component includes a horizontally arranged hydraulic cylinder 2 18 and a motor 19, and the motor 19 is arranged at the output end of the hydraulic cylinder 2 18, and the output end of the motor 19 is rotatably connected to a push column 22 which is slidably connected to the pushing seat 4, and the inner end of the push column 22 is connected to a pushing support plate 20 which matches the inner cavity of the copper tube 7 to be processed, and the pushing support plate 20 includes a chuck and a radial shifting claw adapted to the inner wall of the copper tube 7 to be processed, and the radial shifting claw moves radially outside the chuck and clamps with the inner wall of the copper tube 7 to be processed;

[0033] After the loading is completed, the hydraulic cylinder 2 18 immediately drives the pushing support plate 20 into the copper tube 7 to be processed through the push column 22, so that the radial displacement claw moves outward and tightens it, and the motor 19 drives the current copper tube 7 to be processed to complete the rotation. At the same time, the oil cylinder 15 drives the spinning block 17 through the swing frame 16 to complete the fitting of the outer wall of the copper tube 7 to be processed, and performs dynamic shrinkage processing of the copper tube 7 to be processed according to the processing requirements. The key to the above is: by dynamically adjusting the shrinking force, the spinning forming and shrinking processes are combined, and radial pressure is applied to the port of the copper tube 7 to be processed by the spinning block to achieve non-cutting processing. When the shrinking and expanding are carried out simultaneously, targeted dynamic adjustment is performed according to the connection part of the shrinking and expanding to avoid the problem of flow resistance points at the connection part and the subsequent increase in pressure drop;

[0034] Basic principle: During the shrinkage and expansion process of the refrigeration copper tube port, the present invention realizes continuous shrinkage and expansion of the refrigeration copper tube based on a composite dynamic shrinkage and expansion component combined with a propulsion spinning component. Dynamic expansion is achieved by combining a multi-stage composite expansion die with a hydraulic servo system, and wrinkling and cracking in the traditional expansion process are avoided through precise control of pressure and displacement. Spinning is combined with the shrinkage process, and radial pressure applied to the refrigeration copper tube port is achieved by pushing the spinning component to achieve non-cutting processing. With the combination of the two, continuous and unobstructed shrinkage and expansion processing is realized during the processing of the refrigeration copper tube port, and relevant parameters are dynamically adjustable to match the connection of the shrinkage and expansion, thereby avoiding the problem of flow resistance points at the connection parts and the subsequent increase in pressure drop. Example

[0035] Reference Figures 1-9 As shown, a rotating support rod 24 is installed in the middle of the swing frame 16, and a swing support rod 23 is installed at the lower end of the swing frame 16. The output end of the oil cylinder 15 is rotatably connected to the rotating support rod 24 and the cylinder bottom is rotatably connected to the shrinkage and expansion box 3. The swing support rod 23 is rotatably connected to the shrinkage and expansion box 3. During the shrinkage processing of the copper tube 7 to be processed, the oil cylinder 15 completes the dynamic shrinkage processing through the swing frame 16. The specific process is as follows: the oil cylinder 15 can provide position adjustment of the spinning block 17 by the rotating support rod 24, and complete the basic steering by the swing support rod 23, so that the spinning block 17 and the shrinkage diameter of the copper tube 7 to be processed can be accurately adjusted, and finally the dynamic shrinkage adjustment process according to the required shrinkage diameter is realized. The whole dynamic shrinkage adjustment process can freely adapt to the processing of copper tubes with different wall thicknesses, and greatly shorten the synchronous processing time of large quantities of copper tubes, thereby improving the port processing efficiency of refrigeration copper tubes;

[0036] The feeding and unloading mechanism includes a feeding cylinder 5 arranged on the outside of the pushing port 21 corresponding to the upper end of the pushing seat 4, and a hydraulic cylinder 3 28 is installed outside the feeding cylinder 5. The output end of the hydraulic cylinder 3 28 extends to the feeding cylinder 5 and a push plate 29 is installed inside the feeding cylinder 5 for horizontal feeding of the copper tube 7 to be processed. During unloading: when the refrigeration copper tube that has completed the shrinkage and expansion processing rotates to the top of the pushing seat 4, the hydraulic cylinder 3 28 drives the push plate 29 to move horizontally, thereby pushing out the refrigeration copper tube that has completed the shrinkage and expansion processing, and continuing to place the next copper tube 7 to be processed;

[0037] Reference Figure 1 、 Figure 6 、 Figure 7 and Figure 9 As shown, the feed cylinder 5 is rotatably installed with a feed concave wheel 26 above the pusher seat 4, and the groove of the feed concave wheel 26 is installed with a friction strip 27 for continuously feeding the copper tube 7 to be processed. The above-mentioned push plate 29 and the feed concave wheel 26 can together constitute a continuous and unobstructed loading and unloading of the copper tube 7 to be processed. The copper tube 7 to be processed is first obliquely conveyed by the feed conveyor belt and then continuously fed and conveyed by the push plate 29. The conveying end of the feed conveyor belt corresponds to the upper part of the initial position of the push plate 29, and the distance between the conveying end of the feed conveyor belt and the feed cylinder 5 exceeds the distance between a single copper tube to be processed. The diameter of the tube 7 is determined by the feeding process, which includes two stages. The specific process is as follows: In the first stage, the copper tube 7 to be processed is tilted and conveyed by the feeding conveyor belt. When the end contacts the position tangent to the feeding concave wheel 26, the copper tube 7 to be processed immediately leaves the feeding conveyor belt and falls on the feeding drum 5. In the second stage, the copper tube 7 to be processed is fed by the friction of the feeding concave wheel 26 on the feeding drum 5 to complete the feeding into the downward pushing seat 4. Then, the hydraulic cylinder 28 drives the push plate 29 to move horizontally to push the copper tube 7 to complete the continuous feeding and fall into the rotating seat 6. The completion of these two stages realizes the continuous and unobstructed feeding of the copper tube 7 to be processed. After feeding, the copper tube 7 to be processed is displaced by the rotary structure, so as to continue the shrinking and expanding processing of the end of the copper tube 7 to be processed and the unloading process.

[0038] For this purpose, a connecting plate 9 is installed between the two transfer seats 6. A driven gear ring 25 is provided on the outer cover of one of the transfer seats 6. A second motor is installed on the bracket 2. A driving gear meshing with the driven gear ring 25 is installed on the output end of the second motor. The second motor drives the driven gear ring 25 to rotate through the driving gear, so that the transfer seat 6 produces a positioning rotation, rotates the copper tube 7 to be processed after the feeding is completed to the shrinking and expanding station, and uses the propulsion spinning component to complete the propulsion-spinning dynamic shrinking-compound expansion process;

[0039] This embodiment is combined with the first embodiment, and through the continuous feeding rotary structure, it is ensured that the copper tube 7 to be processed can complete the continuous loading, shrinking and expanding processing and unloading process, and in the synchronous shrinking and expanding processing process of the copper tube 7 to be processed, it can avoid the occurrence of flow resistance points caused by the connection of the connection parts, thereby avoiding the problem of increased pressure drop at the subsequent connection parts of the refrigeration copper tube.

[0040] Embodiment 3: This embodiment combines Embodiment 1 and Embodiment 2 to form a port processing method for refrigeration copper tube production, comprising the following steps:

[0041] S1: First, the copper tube 7 to be processed is conveyed obliquely by the feeding conveyor belt. When the end thereof contacts the position tangent to the feeding concave wheel 26, the copper tube 7 to be processed immediately leaves the feeding conveyor belt and falls onto the feeding drum 5. On the feeding drum 5, the copper tube 7 is fed by the friction of the feeding concave wheel 26 to complete the feeding into the pushing seat 4. Then, the hydraulic cylinder 28 drives the pushing plate 29 to move horizontally to push the copper tube 7 to complete the continuous feeding and fall into the rotating seat 6.

[0042] S2: Motor 2 drives the driven gear ring 25 to rotate through the driving gear, causing the material transfer base 6 to rotate in a positioning manner, rotating the copper tube 7 to be processed after feeding to the shrinking and expanding station, and using the propulsion spinning component to complete the propulsion-spinning dynamic shrinking-compound expansion process;

[0043] S3: Expanding. First, after the feeding of the copper tube 7 to be processed is completed, the hydraulic cylinder 2 18 immediately drives the pushing support plate 20 to enter the copper tube 7 to be processed through the pushing column 22, so that the diameter-shifting claws move outward and tighten. The hydraulic cylinder 1 8 drives the composite expanding die to be pressed into the port of the copper tube 7 to be processed, and uses the pre-expansion section 12, the forming section 13 and the calibration section 11 to accurately expand the port. The precise control of pressure and displacement can avoid wrinkling and cracking that are prone to occur in traditional expanding processes; For shrinking, the hydraulic cylinder 2 18 drives the pushing support plate 20 to enter the copper tube 7 to be processed through the pushing column 22, so that the diameter-shifting claws move outward and tighten. The motor 19 drives the current copper tube 7 to be processed to complete the rotation. At the same time, the oil cylinder 15 drives the spinning block 17 to complete the fitting of the outer wall of the copper tube 7 to be processed through the swing frame 16, and performs dynamic shrinking processing on the copper tube 7 to be processed according to the processing requirements.

[0044] S4: When the refrigeration copper tube that has completed the shrinkage and expansion processing rotates to the top of the pushing seat 4, the hydraulic cylinder 28 drives the push plate 29 to move horizontally, thereby pushing out the refrigeration copper tube that has completed the shrinkage and expansion processing, and continuing to place the next copper tube 7 to be processed.

[0045] In summary, the present invention combines embodiments one, two, and three, uses a multi-stage composite flaring die in combination with a hydraulic servo system to achieve dynamic flaring, avoids wrinkling and cracking in traditional flaring processes through precise control of pressure and displacement, and combines spinning with a shrinking process to achieve radial pressure applied to the refrigeration copper tube port by advancing the spinning assembly, thereby achieving non-cutting processing. The combination of the two achieves continuous, unobstructed shrinking and expanding processing during the processing of the refrigeration copper tube port, and the relevant parameters are dynamically adjustable to match the connection of the shrinking and expanding ports, avoiding the problem of flow resistance points at the connection parts and the subsequent increase in pressure drop.

[0046] And through the continuous feeding rotary structure, it can ensure that the copper tube 7 to be processed can complete the continuous loading, shrinking and expanding processing and unloading process, and in the process of synchronous shrinking and expanding of the copper tube 7 to be processed, the displacement and shrinking and expanding parameters in the loading, shrinking and expanding processing and unloading process can be accurately controlled.

[0047] The above contents are merely examples and explanations of the structure of the present invention. Those skilled in the art may make various modifications or additions to the described specific embodiments or replace them in a similar manner. As long as they do not deviate from the structure of the invention or exceed the scope defined by the claims, they shall fall within the scope of protection of the present invention.

[0048] Throughout this specification, references to terms such as "one embodiment," "example," and "specific example" indicate that the specific features, structures, materials, or characteristics described in conjunction with that embodiment or example are included in at least one embodiment or example of the present invention. In this specification, schematic representations of these terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples.

[0049] The preferred embodiments of the present invention disclosed above are intended only to help illustrate the present invention. These preferred embodiments do not exhaustively describe all details, nor do they limit the present invention to specific embodiments. Obviously, many modifications and variations are possible based on the contents of this specification. These embodiments are selected and described in detail in this specification to better explain the principles and practical applications of the present invention, thereby enabling those skilled in the art to better understand and utilize the present invention. The present invention is limited only by the claims and their full scope and equivalents.

Claims

1. A port processing device for refrigeration copper tube production, characterized by: The invention comprises a bottom plate (1) and a bracket (2), wherein both ends of the bottom plate (1) are respectively provided with a feeding and unloading mechanism for continuously loading and unloading the copper tube (7) to be processed and a composite dynamic shrinking and expanding assembly for shrinking and expanding the copper tube (7) to be processed, a symmetrically arranged rotating seat (6) is rotatably mounted on the bracket (2), and an adapting groove (10) for positioning the copper tube (7) to be processed is provided on the inner ring side of the rotating seat (6), the two adapting grooves (10) at the top are aligned with the feeding and unloading mechanism and are used for continuously loading and unloading the copper tube (7) to be processed, and the two adapting grooves (10) at the bottom are aligned with the composite dynamic shrinking and expanding assembly and are used for shrinking and expanding the copper tube (7) to be processed; The composite dynamic shrinking and expanding assembly comprises a horizontally arranged hydraulic cylinder (8) and an oil cylinder (15) arranged to rotate obliquely, wherein the output end of the oil cylinder (15) is connected to a spinning block (17) for dynamically shrinking the copper tube (7) to be processed via a swing frame (16), and the output end of the hydraulic cylinder (8) is connected to a composite expansion die, wherein the composite expansion die comprises a continuously connected calibration section (11), a pre-expansion section (12) and a forming section (13), thereby realizing dynamic expansion of the copper tube (7) to be processed; A shrinking and expanding box (3) and a pushing seat (4) are respectively provided on both sides of the upper end of the bottom plate (1); the composite dynamic shrinking and expanding component is provided in the shrinking and expanding box (3); and a pushing port (21) aligned with the adapting groove (10) is provided on the inner ring side of the pushing seat (4); and a pushing spinning component is provided on the pushing port (21) at the bottom of the pushing seat (4); The propulsion spinning assembly includes a horizontally arranged hydraulic cylinder 2 (18) and a motor 1 (19), wherein the motor 1 (19) is arranged at the output end of the hydraulic cylinder 2 (18), and the output end of the motor 1 (19) is rotatably connected to a push column (22) slidably connected to a push seat (4), and the inner end of the push column (22) is connected to a push support plate (20) matching the inner cavity of the copper tube (7) to be processed; A rotating support rod (24) is installed in the middle of the swing frame (16), and a swing support rod (23) is installed at the lower end of the swing frame (16). The output end of the oil cylinder (15) is rotatably connected to the rotating support rod (24), and the bottom of the cylinder is rotatably connected to the shrinkage box (3). The swing support rod (23) is rotatably connected to the shrinkage box (3). The feeding and unloading mechanism includes a feeding cylinder (5) arranged outside a pushing port (21) corresponding to the upper end of a pushing seat (4), a hydraulic cylinder three (28) is installed outside the feeding cylinder (5), and an output end of the hydraulic cylinder three (28) extends to the feeding cylinder (5) and is installed with a pushing plate (29) for horizontally feeding the copper tube (7) to be processed; A feed concave wheel (26) is rotatably mounted on the feed cylinder (5) near the upper portion of the pusher seat (4), and a friction strip (27) for continuously feeding the copper tube (7) to be processed is mounted in the groove of the feed concave wheel (26).

2. The port processing device for refrigeration copper tube production according to claim 1, characterized in that: The push support plate (20) comprises a chuck and a radial shifting claw adapted to the inner wall of the copper tube (7) to be processed. The radial shifting claw moves radially outside the chuck and clamps the inner wall of the copper tube (7) to be processed.

3. The port processing device for refrigeration copper tube production according to claim 1, characterized in that: A connecting plate (9) is installed between the two transfer seats (6), a driven gear ring (25) is provided on the outer cover of one of the transfer seats (6), a second motor is installed on the bracket (2), and a driving gear meshing with the driven gear ring (25) is installed at the output end of the second motor.

4. A port processing device for refrigeration copper tube production according to any one of claims 1 to 3, characterized in that: A method for processing a terminal for producing refrigeration copper tubes using the device comprises the following steps: S1: first, the copper tube (7) to be processed is conveyed obliquely by a feeding conveyor belt, and when the end thereof contacts a position tangent to a feed concave wheel (26), the copper tube (7) to be processed immediately leaves the feeding conveyor belt and falls onto a feed barrel (5), and the copper tube (7) to be processed is fed into a pusher seat (4) by friction of the feed concave wheel (26) on the feed barrel (5), and then a hydraulic cylinder (28) drives a push plate (29) to move horizontally to push the copper tube (7) to be processed to complete continuous feeding and fall into a transfer seat (6); S2: Motor 2 drives the driven gear ring 25 to rotate through the driving gear, so that the material transfer seat (6) generates positioning rotation, rotates the copper tube (7) to be processed after the feeding is completed to the shrinking and expanding station, and uses the propulsion spinning component to complete the propulsion-spinning dynamic shrinking-compound expansion process; S3: Expanding. First, after the feeding of the copper tube (7) to be processed is completed, the hydraulic cylinder 2 (18) immediately drives the push support plate (20) to enter the copper tube (7) to be processed through the push column (22), so that the diameter moving claw moves outward and tightens. The hydraulic cylinder 1 (8) drives the composite expanding die to press into the port of the copper tube (7) to be processed, and uses the pre-expansion section (12), the forming section (13) and the calibration section (11) to accurately expand the port. Through the precise control of pressure and displacement, the traditional Wrinkling and cracking are common phenomena in the expansion process; for shrinking, the hydraulic cylinder 2 (18) drives the push support plate (20) into the copper tube (7) to be processed through the push column (22), so that the radial displacement claw moves outward and tightens it, and the motor 1 (19) drives the copper tube (7) to be processed to complete the rotation. At the same time, the oil cylinder (15) drives the spinning block (17) to complete the fitting of the outer wall of the copper tube (7) to be processed through the swing frame (16), and performs dynamic shrinking processing of the copper tube (7) to be processed according to the processing requirements; S4: When the refrigeration copper tube that has completed the shrinkage and expansion process rotates to the top of the pusher seat (4), the hydraulic cylinder (28) drives the push plate (29) to move horizontally, thereby pushing out the refrigeration copper tube that has completed the shrinkage and expansion process, and continuing to place the next copper tube (7) to be processed.

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