An expanding device for alloy tube production

Abstract

This invention relates to the field of aluminum alloy tube manufacturing and processing technology, and discloses a diameter expansion device for alloy tube production. The device includes a base, an expansion assembly for expanding the diameter of the alloy tube is disposed on the upper surface of the base, a fan is fixedly mounted on the upper surface of the base, and a connecting pipe is rotatably connected to the output end of the fan. An expansion ball is fixedly mounted on the end of the connecting pipe away from the fan. An air guide assembly is disposed inside the expansion ball to improve the heat dissipation efficiency between the alloy tube and the high-speed rotating expansion ball when they come into contact. By providing the air guide assembly, and in conjunction with multiple sets of fan-shaped guide grooves opened on the arc surface of the spherical cover, a continuous, relatively cool airflow is blown out at the contact point between the expansion ball and the alloy tube. This airflow continuously carries away the heat at the contact point between the expansion ball and the alloy tube, ensuring a smaller temperature difference between the inside and outside of the expanded section of the alloy tube, preventing cracking during the expansion process, and ensuring the processing quality of the alloy tube.

Description

Technical Field

[0001] This invention relates to the field of aluminum alloy tube production and processing technology, specifically to an expansion device for alloy tube production. Background Technology

[0002] The expansion machine is a type of straight seam welded metal pipe forming equipment. It uses a conical expansion head to expand the steel pipe inside, thereby eliminating the forming pressure and welding stress of the alloy pipe and ensuring that the diameter of the alloy pipe is consistent throughout its entire length. The demand for various metal pipes in daily industrial production makes corresponding expansion devices quite common.

[0003] According to a public notice (No. CN211758080U) regarding a nickel-based alloy tube expansion device, the aforementioned application includes a fan with blades, a fixed base plate, a support rod, and a body. During use, the working position is determined by a fixed connection between the fixed base plate and the top end face of the motor. The bottom end face of the body and the top end face of the motor are fitted together to ensure the overall stability of the fan during operation. The fan blades provide air cooling, enhancing the cooling speed and integrity of the expanded tubes during use.

[0004] However, in actual use, the cooling of the working area of ​​the expanding ball is located outside the cooling equipment. During the processing of the expanding ball, the ball comes into contact with the inner surface of the alloy tube, and the highest temperature is located inside the alloy tube. This results in a large temperature difference between the inside and outside of the alloy tube, which can easily cause cracking at the expanding position of the alloy tube, thereby reducing the service life and processing quality of the alloy tube. In view of this, we propose an expanding device for alloy tube production. Summary of the Invention

[0005] The purpose of this invention is to provide an expanding device for alloy tube production to solve the problems mentioned in the background art.

[0006] To achieve the above objectives, the present invention provides the following technical solution: a diameter expansion device for alloy tube production, comprising a base, an expansion component for expanding the diameter of the alloy tube being disposed on the upper surface of the base, a fan being fixedly installed on the upper surface of the base, a connecting pipe being rotatably connected to the output end of the fan, an expansion ball being fixedly installed at the end of the connecting pipe away from the fan, an air guide component being disposed inside the expansion ball to improve the heat dissipation efficiency between the alloy tube and the high-speed rotating expansion ball, and an auxiliary heat dissipation component being disposed inside the expansion ball to improve the heat dissipation efficiency at the spherical surface of the expansion ball.

[0007] Preferably, the diameter expansion assembly includes a stepper motor, which is fixedly mounted on the upper surface of the base. A threaded rod is fixedly mounted on the output end of the stepper motor. A threaded slide is threadedly connected to the outer wall of the threaded rod. A hydraulic clamp is provided on the upper surface of the threaded slide. A servo motor is fixedly mounted on the upper surface of the base. A drive gear is fixedly mounted on the output end of the servo motor. A driven gear is fixedly mounted through the connecting pipe.

[0008] Preferably, the bottom of the threaded slide is provided with a T-shaped block, and the upper surface of the base is provided with a T-shaped groove that matches the T-shaped block, so that the threaded slide can only slide horizontally along the upper surface of the base. The number of hydraulic clamps is set to four, and the four sets of hydraulic clamps are arranged in a rectangular array on the top of the threaded slide, so that the four sets of hydraulic clamps can clamp and fix the alloy tube on both sides in pairs.

[0009] Preferably, the driving gear and the driven gear mesh to achieve transmission, and the ratio of the diameter of the driving gear to the diameter of the driven gear is 2:1, so that the rotational speed of the driven gear is twice that of the driving gear.

[0010] Preferably, the air guide assembly includes an air intake duct, which is located at the inner axis of the connecting pipe. An annular groove is formed on the inner wall of a section of the air intake duct inside the expanding ball. An installation ring is fixedly installed inside the annular groove. An inner ring is fixedly connected to the arc-shaped inner surface of the installation ring by a thin rod. A connecting rod passes through the arc-shaped inner surface of the inner ring. A straight groove is formed on the inner wall of the connecting rod. A square rod is slidably installed on the inner wall of the straight groove. A return spring is fixedly connected between the square rod and the inner wall of the end of the straight groove. A spherical cover is fixedly installed at the end of the connecting rod away from the fan. A guide groove is formed on the inner surface of the spherical cover on the side near the expanding ball. An auxiliary ring is provided inside the air intake duct. A fan impeller is fixedly installed through and fixedly mounted on the connecting rod.

[0011] Preferably, the outer wall of the end of the expanded sphere away from the fan has a storage groove of a size that matches the spherical cover. The inner surface of the inner ring has an inner ring groove with a diameter that matches the length of the square rod. The square rod is placed in the inner ring groove. This allows the connecting rod to move relative to the fan in the horizontal direction. Due to the square rod and the inner ring groove, and the elastic force of the return spring, the connecting rod tends to move towards the fan side.

[0012] Preferably, the guide grooves are provided in multiple sets, and the multiple sets of guide grooves are evenly distributed in a circumferential array on the inner surface of the spherical cover. The guide grooves are arranged in a fan shape with one end narrower than the center of the spherical cover and the other end wider than the center of the spherical cover. The surface of the spherical cover near the expanded diameter ball is set in an arc shape, thereby increasing the influence range of the airflow blown out through the guide grooves and making the direction of airflow closer to the contact point between the expanded diameter ball and the alloy tube.

[0013] Preferably, the auxiliary heat dissipation assembly includes a conical shroud, which is fixedly installed on the end of the connecting rod away from the spherical shroud. The inner wall of the expanded diameter sphere has an air guide cavity and an annular heat exchange cavity. The conical shroud is conical in shape, and the bottom diameter of the conical shroud is set to one-third of the inner diameter of the air inlet. At the same time, the top of the conical shroud faces the fan side to avoid excessive obstruction to the air inlet. The air guide cavity is arc-shaped, and there are two sets of air guide cavities, which are mirror images of each other on the upper and lower sides of the horizontal central axis of the expanded diameter sphere.

[0014] Preferably, the annular heat exchange cavity is provided with a turbulence component to promote the flow of heat transfer oil. The turbulence component includes a limiting ball, which is fixedly installed on the arc-shaped inner surface of the annular heat exchange cavity. The annular heat exchange cavity is provided with a turbulence ball and an auxiliary ball. The turbulence ball has a rectangular cavity inside, and a magnetic block is provided inside the rectangular cavity. The magnetic properties of the corresponding magnetic blocks inside the turbulence ball and the auxiliary ball are opposite, so that the turbulence ball and the auxiliary ball can move approximately randomly within the activity range.

[0015] Preferably, the number of limiting balls is set in multiple sets, and each set has two limiting balls. The two limiting balls are respectively set on the upper and lower inner surfaces of the annular heat exchange cavity, and the multiple sets of limiting balls are evenly distributed in a circumferential array inside the annular heat exchange cavity to form multiple active zones inside the annular heat exchange cavity. The turbulence ball and the auxiliary ball are respectively set in the same active zone.

[0016] Compared with the prior art, the present invention provides an expanding device for alloy tube production, which has the following advantages:

[0017] 1. The alloy tube expansion device is equipped with an air guide assembly. Due to the influence of the high-speed airflow blown into the air inlet on the fan impeller, the spherical cover will drive the connecting rod to move closer to the alloy tube to expose the receiving groove and air inlet. In conjunction with multiple sets of fan-shaped guide grooves opened on the arc surface of the spherical cover, a continuous and relatively cool airflow is blown out at the contact point between the expansion ball and the alloy tube. As the expansion ball causes a certain deformation of the inner surface of the alloy tube during the expansion operation, the airflow will continuously carry away the heat at the contact point between the expansion ball and the alloy tube, so as to ensure that the temperature difference between the inside and outside of the alloy tube at the expansion point is reduced, avoid cracking during the expansion operation, and ensure the processing quality of the alloy tube.

[0018] 2. The expansion device for alloy tube production is equipped with auxiliary heat dissipation components. When a high-speed airflow is blown into the air inlet, the connecting rod moves away from the fan due to the influence of the airflow on the spherical cover. Finally, the conical cover moves to the end of the air guide cavity. At this time, due to the influence of the conical cover, part of the airflow will enter the interior of the air guide cavity and eventually return to the air inlet through the other end of the air guide cavity. With the help of the heat transfer oil, which serves as the heat exchange medium between the expansion ball and the air guide cavity, the temperature on the spherical surface of the expansion ball is kept in a relatively balanced state, while ensuring the overall heat dissipation effect of the expansion ball.

[0019] 3. The expansion device for producing alloy tubes is equipped with a turbulence component. During the rotation of the expansion ball, the magnetic properties of the corresponding magnetic blocks inside the turbulence ball and the auxiliary ball are opposite, which allows the turbulence ball and the auxiliary ball to move in an almost disordered manner within the active range. This promotes the flow of heat transfer oil within the active range, thereby balancing the temperature of the expansion ball surface and improving the overall heat dissipation effect of the expansion ball. Attached Figure Description

[0020] Figure 1 This is a schematic diagram of the main structure of the present invention;

[0021] Figure 2 This is a schematic cross-sectional view of the connecting pipe and the expanded diameter ball of the present invention;

[0022] Figure 3 This is a cross-sectional view of the expanded diameter sphere and a partial exploded view of the air guide assembly of the present invention;

[0023] Figure 4 This is an exploded view of the mounting ring and connecting rod of the present invention;

[0024] Figure 5 This is a schematic diagram of the cross-sectional structure of the expanded diameter sphere of the present invention;

[0025] Figure 6 This is a schematic diagram of the turbulence-disrupting sphere and auxiliary sphere structure of the present invention.

[0026] In the diagram: 1. Base; 2. Expansion assembly; 21. Stepper motor; 22. Threaded rod; 23. Threaded slide; 24. Hydraulic clamp; 25. Servo motor; 26. Drive gear; 27. Fan; 28. Connecting pipe; 29. ​​Driven gear; 210. Expansion ball; 3. Air guide assembly; 31. Air inlet; 32. Annular groove; 33. Mounting ring; 34. Inner ring; 35. Connecting rod; 36. Straight groove; 37. Square rod; 38. Return spring; 39. Spherical cover; 310. Guide groove; 311. Auxiliary ring; 312. Fan impeller; 4. Auxiliary heat dissipation assembly; 41. Conical cover; 42. Air guide cavity; 43. Annular heat exchange cavity; 5. Turbulence assembly; 51. Limiting ball; 52. Turbulence ball; 53. Auxiliary ball; 54. Magnetic block. Detailed Implementation

[0027] like Figures 1-6 As shown, the present invention provides a technical solution: an alloy tube expansion device, including a base 1, and an expansion component 2 for expanding the diameter of the alloy tube is provided on the upper surface of the base 1. The expansion component 2 includes a stepper motor 21, a threaded rod 22, a threaded slide 23, a hydraulic clamp 24, a servo motor 25, a drive gear 26, a fan 27, a connecting pipe 28, a driven gear 29, and an expansion ball 210.

[0028] In one embodiment of the present invention, a stepper motor 21 is fixedly mounted on the upper surface of the base 1. A threaded rod 22 is fixedly mounted on the output end of the stepper motor 21. A threaded slide 23 is threadedly connected to the outer wall of the threaded rod 22. A hydraulic clamp 24 is provided on the upper surface of the threaded slide 23. A servo motor 25 is fixedly mounted on the upper surface of the base 1. A drive gear 26 is fixedly mounted on the output end of the servo motor 25. A fan 27 is fixedly mounted on the upper surface of the base 1. A connecting pipe 28 is rotatably connected to the output end of the fan 27. A driven gear 29 is fixedly mounted through the connecting pipe 28. An expanded diameter ball 210 is fixedly mounted on the end of the connecting pipe 28 away from the fan 27.

[0029] Please refer to the attached instruction manual. Figures 1-2In an embodiment of the present invention, a T-shaped block is provided at the bottom of the threaded slide 23, and a T-shaped groove adapted to the T-shaped block is provided on the upper surface of the base 1, so that the threaded slide 23 can only slide horizontally along the upper surface of the base 1, thereby preventing the threaded slide 23 from rotating with the rotation of the threaded rod 22. Specifically, when the stepper motor 21 is started, it drives the threaded rod 22 to rotate. At this time, the threaded slide 23 will move horizontally towards the expanded diameter ball 210 along the upper surface of the base 1. Furthermore, the number of hydraulic clamps 24 is set to four, and the four sets of hydraulic clamps are... The clamps 24 are arranged in a rectangular array on top of the threaded slide 23, so that the four sets of hydraulic clamps 24 are paired up on both sides to clamp and fix the alloy tube, thereby ensuring the relative stability of the alloy tube during the diameter expansion process. At the same time, the center lines of the alloy tube, the expansion ball 210 and the connecting pipe 28 positioned by the hydraulic clamps 24 are all set on the same horizontal line, so that when the threaded slide 23 drives the hydraulic clamps 24 and the alloy tube to move towards the expansion ball 210, the expansion ball 210 can be accurately inserted into the end of the alloy tube, thereby realizing the diameter expansion operation of the alloy tube.

[0030] Simultaneously, the driving gear 26 meshes with the driven gear 29 to achieve transmission. Specifically, the diameter ratio of the driving gear 26 to the driven gear 29 is 2:1, which makes the rotational speed of the driven gear 29 twice that of the driving gear 26. This ensures that the expanding ball 210 can maintain a faster rotational speed when rotating with the connecting pipe 28, thereby completing the diameter expansion operation of the alloy tube end. Furthermore, the output end of the fan 27 is provided with a rotating structure to ensure that when the end of the connecting pipe 28 is connected to the rotating structure, it can maintain rotation without affecting the sealing between the two. This allows the fan 27 to continuously blow airflow into the interior of the connecting pipe 28 when it starts, thereby achieving the heat dissipation effect. Specifically, the upper surface of the base 1 is provided with two sets of vertical plates, and the connecting pipe 28 passes through the two sets of vertical plates and is rotatably connected to the two sets of vertical plates, thereby ensuring that the connecting pipe 28 and the base 1 are relatively horizontally arranged to realize the diameter expansion operation of the alloy tube.

[0031] Please refer to the attached instruction manual. Figures 2-5 In an embodiment of the present invention, the interior of the expanded diameter ball 210 is provided with an air guide assembly 3 to improve the heat dissipation efficiency between the alloy tube and the high-speed rotating expanded diameter ball 210 when they come into contact. The air guide assembly 3 includes an air inlet 31, an annular groove 32, a mounting ring 33, an inner ring 34, a connecting rod 35, a straight groove 36, a square rod 37, a return spring 38, a spherical cover 39, a guide groove 310, an auxiliary ring 311, and a fan impeller 312.

[0032] Furthermore, the intake duct 31 is located at the inner axis of the connecting pipe 28. An annular groove 32 is formed on the inner wall of the section of the intake duct 31 inside the expansion ball 210. An installation ring 33 is fixedly installed inside the annular groove 32. An inner ring 34 is fixedly connected to the arc-shaped inner surface of the installation ring 33 by a thin rod. A connecting rod 35 passes through the arc-shaped inner surface of the inner ring 34. A straight groove 36 is formed on the inner wall of the connecting rod 35. A square rod 37 is slidably installed on the inner wall of the straight groove 36. A return spring 38 is fixedly connected between the square rod 37 and the inner wall of the end of the straight groove 36. A spherical cover 39 is fixedly installed on the end of the connecting rod 35 away from the fan 27. A guide groove 310 is formed on the inner surface of the side of the spherical cover 39 near the expansion ball 210. An auxiliary ring 311 is provided inside the intake duct 31. A fan impeller 312 is fixedly installed through the connecting rod 35.

[0033] In addition, the air intake duct 31 passes through the connecting pipe 28 and the expansion ball 210. A receiving groove of a size adapted to the spherical cover 39 is provided on the outer wall of the end of the expansion ball 210 away from the fan 27, so that the spherical cover 39 will retract into its interior in the initial state. Simultaneously, two sets of annular grooves 32 are provided, symmetrically arranged on the left and right inner walls of the expansion ball 210 about its vertical central axis. The two sets of annular grooves 32 are respectively adapted to the mounting ring 33 and the auxiliary ring 311. Specifically, the mounting ring 33 is located on the side closer to the spherical cover 39, while the auxiliary ring 311 is located on the side closer to the fan 27. Furthermore… The auxiliary ring 311 has an internal structure identical to the mounting ring 33 to ensure the horizontal positioning and movement of the connecting rod 35 within the air intake duct 31, thereby ensuring the operational stability of the connecting rod 35 and the spherical cover 39. Simultaneously, the inner ring 34 has an inner ring groove on its arc-shaped inner surface with a diameter matching the length of the square rod 37, and the square rod 37 is positioned within this inner ring groove. This allows the connecting rod 35 to move relative to the fan 27 while simultaneously exhibiting horizontal movement. Due to the arrangement of the square rod 37 and the inner ring groove, combined with the elasticity of the return spring 38, the connecting rod 35 tends to move towards the fan 27, thus allowing it to return to its original position under the elasticity of the return spring 38 when the influence of the external airflow ends.

[0034] Meanwhile, multiple sets of guide grooves 310 are provided, and these multiple sets of guide grooves 310 are evenly distributed in a circumferential array on the inner surface of the spherical cover 39. Furthermore, the guide grooves 310 are arranged in a fan shape, narrower at one end near the center of the spherical cover 39 and wider at the other end away from the center, thereby increasing the influence range of the airflow blown out through the guide grooves 310. This makes the direction of airflow closer to the contact point between the expanded diameter ball 210 and the alloy tube. Additionally, the surface of the spherical cover 39 near the expanded diameter ball 210 is provided with… The airflow is arranged in an arc shape, so that the airflow blown out from the intake duct 31 can be affected by the arc surface of the spherical cover 39 and diffuse along the spherical surface of the expansion ball 210, thereby improving the heat dissipation effect at the joint between the expansion ball 210 and the alloy tube. In addition, when a continuous airflow is blown into the intake duct 31, the airflow fan impeller 312 causes the fan impeller 312 to drive the connecting rod 35 to rotate, thereby cooperating with the rotating guide groove 310 to improve the heat dissipation effect of the spherical surface of the expansion ball 210.

[0035] Please refer to the attached instruction manual. Figures 3-5 In an embodiment of the present invention, an auxiliary heat dissipation component 4 is provided inside the expanded diameter ball 210 to improve the heat dissipation efficiency at the spherical surface of the expanded diameter ball 210. The auxiliary heat dissipation component 4 includes a conical cover 41, which is fixedly installed on the end of the connecting rod 35 away from the spherical cover 39. An air guide cavity 42 is opened on the inner wall of the expanded diameter ball 210, and an annular heat exchange cavity 43 is opened on the inner wall of the expanded diameter ball 210.

[0036] Specifically, the conical shroud 41 is cone-shaped, and the diameter of its base is one-third of the inner diameter of the air intake duct 31. The top of the conical shroud 41 faces the fan 27 to avoid excessive obstruction of the air intake duct 31, which would affect the airflow through the fan impeller 312 and the spherical shroud 39, and consequently the overall heat dissipation of the expanded diameter ball 210. Simultaneously, the air guide chamber 42 is arc-shaped, and two sets of air guide chambers 42 are provided. The mirror image is positioned on the upper and lower sides of the horizontal central axis of the expansion ball 210. When a high-speed airflow is blown into the intake duct 31, the connecting rod 35 will move away from the fan 27 due to the influence of the airflow on the spherical cover 39. Finally, the conical cover 41 moves to the end of the air guide cavity 42. At this time, due to the influence of the conical cover 41, part of the airflow will enter the interior of the air guide cavity 42 and eventually return to the intake duct 31 through the other end of the air guide cavity 42 to remove the heat near the spherical surface of the expansion ball 210.

[0037] Furthermore, the annular heat exchange cavity 43 is filled with heat-conducting oil, and the annular heat exchange cavity 43 and the air guide cavity 42 are arranged perpendicular to each other. By filling the annular heat exchange cavity 43 with heat-conducting oil, it serves as a medium for heat exchange between the expansion ball 210 and the air guide cavity 42, thereby maintaining a relatively balanced temperature on the spherical surface of the expansion ball 210 and ensuring the overall heat dissipation effect of the expansion ball 210.

[0038] Please refer to the attached instruction manual. Figures 5-6 In an embodiment of the present invention, the annular heat exchange cavity 43 is provided with a turbulence component 5 to promote the flow of heat transfer oil. The turbulence component 5 includes a limiting ball 51, which is fixedly installed on the arc-shaped inner surface of the annular heat exchange cavity 43. The annular heat exchange cavity 43 is provided with a turbulence ball 52 and an auxiliary ball 53. The turbulence ball 52 has a rectangular cavity inside, and a magnetic block 54 is provided inside the rectangular cavity.

[0039] It is worth noting that multiple sets of limiting balls 51 are provided, with two limiting balls 51 in each set. The two limiting balls 51 are correspondingly positioned on the upper and lower inner surfaces of the annular heat exchange cavity 43. These multiple sets of limiting balls 51 are evenly distributed in a circumferential array inside the annular heat exchange cavity 43, forming multiple active zones within the cavity. The turbulence-inducing ball 52 and the auxiliary ball 53 are positioned within the same active zone. As the expanding ball 210 rotates, the turbulence-inducing ball 52 and the auxiliary ball 53 will approach and collide with each other within the active zone. Specifically… The diameters of the turbulence ball 52 and the auxiliary ball 53 are smaller than the inner diameter of the annular heat exchange cavity 43 to ensure the normal rolling of the turbulence ball 52 and the auxiliary ball 53. Furthermore, the auxiliary ball 53 is provided with another set of rectangular cavities and magnetic blocks 54 inside, and the magnetic properties of the corresponding magnetic blocks 54 inside the turbulence ball 52 and the auxiliary ball 53 are opposite, so that the turbulence ball 52 and the auxiliary ball 53 can move in an almost disordered manner within the active range, thereby promoting the flow of heat transfer oil in the active range to balance the surface temperature of the expansion ball 210, thereby improving the overall heat dissipation effect of the expansion ball 210.

[0040] In this invention, during use, the alloy tube to be processed is placed on top of the threaded slide block 23. At this time, the four sets of hydraulic clamps 24 are controlled to center the alloy tube. The axis of the alloy tube and the expansion ball 210 are measured and confirmed to be on the same straight line. At this time, the stepper motor 21 is started to drive the threaded rod 22 to rotate. At this time, the threaded slide block 23 drives the fixed alloy tube to move towards the expansion ball 210. Simultaneously, the servo motor 25 is started, cooperating with the drive gear 26 and the driven gear 29, so that the connecting tube 28 drives the expansion ball 210 to rotate at high speed, so as to perform the expansion processing operation on the gradually approaching end of the alloy tube.

[0041] During the diameter expansion process, the blower 27 is started to blow high-speed airflow into the air intake duct 31. Due to the airflow, the pressure inside the air intake duct 31 increases. At this time, the spherical cover 39 will drive the connecting rod 35 to move closer to the alloy tube. At the same time, due to the influence of the airflow on the fan impeller 312, the connecting rod 35 drives the spherical cover 39 to rotate continuously. In conjunction with the multiple sets of fan-shaped guide grooves 310 opened on the arc surface of the spherical cover 39, a continuous and relatively cool airflow is blown at the joint between the diameter expansion ball 210 and the alloy tube. During the diameter expansion operation, the diameter expansion ball 210 causes a certain deformation on the inner surface of the alloy tube, so that the airflow will continuously carry away the heat at the joint between the diameter expansion ball 210 and the alloy tube, so as to ensure that the temperature difference between the inside and outside of the diameter expansion of the alloy tube is reduced, avoiding cracking during the diameter expansion operation and ensuring the processing quality of the alloy tube.

[0042] The present invention has been described in detail above. However, modifications or improvements can be made to it, which will be obvious to those skilled in the art. Therefore, any modifications or improvements that do not depart from the spirit of the present invention are within the scope of protection of the present invention.

Claims

1. A diameter expansion device for alloy tube production, comprising a base (1), wherein a diameter expansion assembly (2) for expanding the diameter of the alloy tube is provided on the upper surface of the base (1), a fan (27) is fixedly installed on the upper surface of the base (1), a connecting pipe (28) is rotatably connected to the output end of the fan (27), and an expansion ball (210) is fixedly installed at the end of the connecting pipe (28) away from the fan (27), characterized in that: The interior of the expanded diameter ball (210) is provided with an air guide assembly (3) to improve the heat dissipation efficiency between the alloy tube and the high-speed rotating expanded diameter ball (210) when they come into contact. The interior of the expanded diameter ball (210) is provided with an auxiliary heat dissipation assembly (4) to improve the heat dissipation efficiency at the spherical surface of the expanded diameter ball (210). The air guide assembly (3) includes an air inlet (31), which is located at the inner axis of the connecting pipe (28). An annular groove (32) is formed on the inner wall of the section of the air inlet (31) inside the expansion ball (210). An installation ring (33) is fixedly installed inside the annular groove (32). An inner ring (34) is fixedly connected to the arc-shaped inner surface of the installation ring (33) by a thin rod. A connecting rod (35) passes through the arc-shaped inner surface of the inner ring (34). A straight groove (35) is formed on the inner wall of the connecting rod (35). 6) A square rod (37) is slidably installed on the inner wall of the straight groove (36). A return spring (38) is fixedly connected between the square rod (37) and the inner wall of the end of the straight groove (36). A spherical cover (39) is fixedly installed on the end of the connecting rod (35) away from the fan (27). A guide groove (310) is opened on the inner surface of the spherical cover (39) near the expansion ball (210). An auxiliary ring (311) is provided inside the air intake (31). A fan impeller (312) is fixedly installed through the connecting rod (35).

2. The expanding device for alloy tube production according to claim 1, characterized in that: The expansion assembly (2) includes a stepper motor (21), which is fixedly mounted on the upper surface of the base (1). A threaded rod (22) is fixedly mounted on the output end of the stepper motor (21). A threaded slide (23) is threadedly connected to the outer wall of the threaded rod (22). A hydraulic clamp (24) is provided on the upper surface of the threaded slide (23). A servo motor (25) is fixedly mounted on the upper surface of the base (1). A drive gear (26) is fixedly mounted on the output end of the servo motor (25). A driven gear (29) is fixedly mounted through the connecting pipe (28).

3. The expanding device for alloy tube production according to claim 2, characterized in that: The bottom of the threaded slide (23) is provided with a T-shaped block, and the upper surface of the base (1) is provided with a T-shaped groove that matches the T-shaped block. The number of hydraulic clamps (24) is set to four, and the four sets of hydraulic clamps (24) are arranged in a rectangular array on the top of the threaded slide (23).

4. The expanding device for alloy tube production according to claim 2, characterized in that: The driving gear (26) meshes with the driven gear (29) to achieve transmission, and the ratio of the diameter of the driving gear (26) to the diameter of the driven gear (29) is 2:

1.

5. The expanding device for alloy tube production according to claim 4, characterized in that: The outer wall of the expanded diameter ball (210) away from the fan (27) has a storage groove of a size that matches the spherical cover (39). The inner ring (34) has an inner ring groove with a diameter that matches the length of the square rod (37) on its arc-shaped inner surface, and the square rod (37) is placed in the inner ring groove.

6. The expanding device for alloy tube production according to claim 5, characterized in that: The guide grooves (310) are arranged in multiple sets, and the multiple sets of guide grooves (310) are evenly distributed in a circumferential array on the inner surface of the spherical cover (39). The guide grooves (310) are arranged in a fan shape with one end narrower than the center of the spherical cover (39) and the other end wider than the center of the spherical cover (39). The side surface of the spherical cover (39) near the expanded diameter ball (210) is arranged in an arc shape.

7. The expanding device for alloy tube production according to claim 6, characterized in that: The auxiliary heat dissipation component (4) includes a conical cover (41), which is fixedly installed on the end of the connecting rod (35) away from the spherical cover (39). The inner wall of the expanded diameter ball (210) is provided with an air guide cavity (42) and an annular heat exchange cavity (43) is provided on the inner wall of the expanded diameter ball (210). The conical cover (41) is conical in shape, and the bottom diameter of the conical cover (41) is set to one-third of the inner diameter of the air inlet (31). At the same time, the top of the conical cover (41) faces the fan (27). The air guide cavity (42) is arc-shaped, and there are two sets of air guide cavities (42). The two sets of air guide cavities (42) are mirror images of each other on the upper and lower sides of the horizontal central axis of the expanded diameter ball (210).

8. The expanding device for alloy tube production according to claim 7, characterized in that: The annular heat exchange cavity (43) is filled with heat transfer oil, and the annular heat exchange cavity (43) and the air guide cavity (42) are arranged perpendicular to each other. The annular heat exchange cavity (43) is provided with a turbulence component (5) to promote the flow of heat transfer oil. The turbulence component (5) includes a limiting ball (51), which is fixedly installed on the arc-shaped inner surface of the annular heat exchange cavity (43). The annular heat exchange cavity (43) is provided with a turbulence ball (52) and an auxiliary ball (53). The turbulence ball (52) has a rectangular cavity inside, and a magnetic block (54) is provided inside the rectangular cavity. The magnetic properties of the magnetic blocks (54) corresponding to the turbulence ball (52) and the auxiliary ball (53) are opposite.

9. The expanding device for alloy tube production according to claim 8, characterized in that: The number of the limiting balls (51) is set in multiple sets, and each set of limiting balls (51) has two balls. The two limiting balls (51) are respectively set on the upper and lower inner surfaces of the annular heat exchange cavity (43). The multiple sets of limiting balls (51) are evenly distributed in a circular array inside the annular heat exchange cavity (43), forming multiple active zones inside the annular heat exchange cavity (43). The turbulence ball (52) and the auxiliary ball (53) are respectively set in the same active zone.

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