Special rolling equipment for facilitating additive diameter change of aluminum and aluminum alloy

Abstract

The application discloses a special rolling equipment convenient for additive variable-diameter of aluminum and aluminum alloy, which comprises an additive variable-diameter structure; the additive variable-diameter structure comprises a variable-diameter die, a lubricating powder guide cylinder is arranged in the variable-diameter die, and the end of the variable-diameter die is blocked by a cover plate for limiting the lubricating powder; the additive is uniformly coated with the lubricating powder after passing through a first feeding hole, a cleaning hole and a second feeding hole. The lubricating powder is uniformly and continuously coated by cooperation of the rotary spiral blade and the conical feeding hole, the problems of coating dead angle and uneven thickness existing in the traditional powder coating mode are solved, the leakage and dust pollution of the lubricating powder are greatly reduced by the closed circulation powder supply structure, the occupational health risk and environmental protection cost are reduced, the coating is leveled in real time through the cleaning hole, the drawing fracture and die wear are reduced, and the yield and production stability are improved; the overall structure is compact, convenient to disassemble, maintain and has high universality, and is suitable for continuous variable-diameter processing of aluminum and aluminum alloy additives of various specifications.

Description

Technical Field

[0001] This invention relates to the field of wire drawing equipment technology, and in particular to a special rolling equipment for easy addition and reduction of diameter of aluminum and aluminum alloys. Background Technology

[0002] Wire drawing is a metal processing method that applies tensile force to metal using drawing dies, causing it to pass through die holes and gradually become thinner to achieve the desired specifications and dimensions. This process is widely used in industry and can produce metal wires of various specifications and materials, such as copper wire, steel wire, and nickel wire. The basic principle of wire drawing is to apply tensile force to the wire using drawing dies, causing it to pass through die holes and gradually become thinner to achieve the desired specifications and dimensions. During drawing, the metal wire passes through multiple die holes in sequence under the pulling force, causing its diameter to gradually decrease to the required size.

[0003] Patent application CN118080591A discloses a metal wire drawing device that uses lubricating powder to lubricate the metal wire passing through the drawing die, reducing the probability of metal wire breakage and improving the yield rate. However, the powder coating component is prone to dead corners during operation, and cannot evenly coat the outer surface of the metal wire to be drawn with lubricating powder. As a result, the wear of the metal wire increases during drawing, and even breakage may occur. Secondly, since the lubricating powder on the metal wire is scraped off when passing through the die during the drawing process, it is scattered in the air or inside the device, resulting in occupational health risks and high environmental treatment costs.

[0004] Therefore, this application proposes a special rolling equipment for easy addition and diameter change of aluminum and aluminum alloys. Summary of the Invention

[0005] The purpose of this invention is to solve the above-mentioned technical problems by proposing a special rolling equipment for easy addition and diameter change of aluminum and aluminum alloys.

[0006] To achieve the above objectives, the present invention adopts the following technical solution: A special rolling equipment for additive manufacturing of aluminum and aluminum alloys with variable diameter includes an uncoiling structure, a guiding structure, and an additive diameter-changing structure. The additive manufacturing diameter-changing structure includes a diameter-changing mold with a lubricating powder guide cylinder inside. The end of the diameter-changing mold is sealed by a cover plate to limit the lubricating powder. The lubricating powder guide cylinder has a rotatable spiral blade. The spiral blade has a first feeding hole, a cleaning hole, and a second feeding hole coaxially arranged in the middle. After the additive material passes through the first feeding hole, the cleaning hole, and the second feeding hole, it is uniformly coated with lubricating powder and then drawn and changed in diameter by the diameter-changing mold.

[0007] Preferably, the additive variable diameter structure further includes a base, on which a bracket is installed, and a lubricating powder container is fixed on the bracket by a clamp. The variable diameter mold and the lubricating powder container are coaxially arranged and integrally formed.

[0008] Preferably, the cover plate is provided with a threaded joint, the inner wall of the lubricating powder container is provided with a threaded interface, the threaded joint is threadedly connected to the threaded interface, and the lubricating powder guide cylinder passes through the cover plate and is fixedly connected to it.

[0009] Preferably, a rotating ring is rotatably connected to one end of the lubricating powder guide cylinder, and a connecting ring is fixed to the inner wall of the rotating ring. The connecting ring is connected to the spiral blade through two connecting rods.

[0010] Preferably, a speed reducer is installed on the base, the output end of the speed reducer is connected to a drive shaft, and a transmission wheel is installed on the drive shaft and the rotating ring. The two transmission wheels are connected by a transmission belt.

[0011] Preferably, a guide tube is fixedly connected to the rotating ring, and a coaxial rubber ring is fixed to the inner wall of the guide tube.

[0012] Preferably, both the first feeding hole and the second feeding hole are tapered, and the inner diameter of the opposite end of the first feeding hole and the second feeding hole is larger than the inner diameter of the near end of the two.

[0013] Preferably, the cleaning hole is located between the first feeding hole and the second feeding hole, and the cleaning hole is coaxially arranged with the first feeding hole and the second feeding hole.

[0014] Preferably, a feed hopper is installed through the upper end of the lubricating powder guide cylinder, a support rod is fixed on the spiral blade, and a digging hopper is fixed at the end of the support rod. The digging hopper is used to dig up the lubricating powder and pour it into the feed hopper.

[0015] Preferably, the upper end of the feed hopper is provided with a through groove along the direction of the digging hopper's movement trajectory, and the digging hopper can move through the through groove.

[0016] Compared with the prior art, the beneficial effects of this invention are as follows: 1. By using a rotating spiral blade in conjunction with the first and second feeding holes of a conical structure, the lubricating powder is guided to gather and adhere tightly to the additive surface, completely solving the coating dead zone problem of traditional powder coating components; at the same time, the rotation of the spiral blade enables the lubricating powder to flow continuously in the axial direction, ensuring that the lubricating powder coating thickness is uniform across the entire surface of the additive, and significantly reducing additive wear and breakage caused by uneven coating during the drawing process.

[0017] 2. The lubricating powder is confined within a closed cavity consisting of a lubricating powder container, a cover plate, and a variable diameter mold for recycling. The cooperation between the excavator and the feed hopper enables continuous lifting and circulation of the lubricating powder, significantly reducing lubricating powder leakage and dust leakage. This not only improves the working environment and reduces occupational health risks caused by dust, but also reduces lubricating powder waste and subsequent environmental treatment costs.

[0018] 3. The cleaning hole can scrape off excess and clumps of lubricating powder from the additive manufacturing surface in real time and re-disperse it, ensuring a consistent coating thickness and preventing excessive local powder layer thickness, which can cause powder to fall off and clog the mold during drawing. At the same time, it can scrape off foreign objects from the additive manufacturing surface, eliminate impurities that interfere with diameter change processing, reduce mold wear, improve the yield of additive diameter change, and extend the service life of the mold.

[0019] 4. The cover plate and the lubricating powder container are connected by a threaded detachable connection. After the machine is stopped, the lubricating powder guide cylinder can be quickly removed to thoroughly clean the internal spiral blades, various holes and the inner wall of the cavity, so as to avoid the residual lubricating powder hardening and clumping and affecting the use. The rubber ring in the guide tube can be quickly replaced according to the additive diameter, which can adapt to the variable diameter processing needs of various specifications of aluminum and aluminum alloy additives, thus improving the applicability of the equipment.

[0020] In summary, this invention achieves uniform and continuous coating of lubricating powder through the combination of a rotating spiral blade and a conical feeding hole, solving the problems of coating dead corners and uneven thickness in traditional powder coating methods. The closed-loop powder supply structure significantly reduces lubricating powder leakage and dust pollution, lowering occupational health risks and environmental costs. Real-time coating leveling through cleaning holes reduces drawing breakage and mold wear, improving yield and production stability. The overall structure is compact, easy to disassemble and maintain, and highly versatile, suitable for continuous variable diameter processing of various specifications of aluminum and aluminum alloy additives. Attached Figure Description

[0021] Figure 1 This is a schematic diagram of the structure of a special rolling equipment for additive manufacturing of aluminum and aluminum alloys that facilitates diameter variation, as proposed in this invention. Figure 2 This is a schematic diagram of an additive diameter changing structure in a special rolling equipment for facilitating additive diameter changing of aluminum and aluminum alloys, as proposed in this invention. Figure 3 This is a perspective view of an additive diameter changing structure in a special rolling equipment for facilitating additive diameter changing of aluminum and aluminum alloys, as proposed in this invention. Figure 4 This is a side view of an additive diameter changing structure in a special rolling equipment for facilitating additive diameter changing of aluminum and aluminum alloys, as proposed in this invention. Figure 5 This is a schematic diagram of the diameter-changing die in a special rolling equipment for additive manufacturing of aluminum and aluminum alloys, as proposed in this invention. Figure 6This is a schematic diagram of the internal structure of a diameter-changing die in a special rolling equipment for additive manufacturing of aluminum and aluminum alloys, as proposed in this invention. Figure 7 This is a schematic diagram of the guide tube structure in a special rolling equipment for additive manufacturing of aluminum and aluminum alloys, as proposed in this invention. Figure 8 This is a schematic diagram of the structure of a lubricating powder guide cylinder in a special rolling equipment for additive manufacturing of aluminum and aluminum alloys, as proposed in this invention. Figure 9 This is a schematic diagram of the spiral blade in a special rolling equipment for additive manufacturing of aluminum and aluminum alloys that facilitates diameter variation, as proposed in this invention. Figure 10 This is a schematic diagram of the internal structure of the spiral blade in a special rolling equipment for additive manufacturing of aluminum and aluminum alloys, as proposed in this invention.

[0022] In the diagram: 1 Unwinding structure, 2 Guide structure, 3 Additive diameter changing structure, 4 Base, 5 Bracket, 6 Reducer, 7 Drive shaft, 8 Transmission belt, 9 Guide tube, 10 Lubricating powder guide cylinder, 11 Cover plate, 12 Lubricating powder container, 13 Variable diameter mold, 14 Transmission wheel, 15 Rubber ring, 16 Rotating ring, 17 Connecting ring, 18 Feed hopper, 19 Digging hopper, 20 Support rod, 21 Through slot, 22 Spiral blade, 23 Connecting rod, 24 First feeding hole, 25 Cleaning hole, 26 Second feeding hole. Detailed Implementation

[0023] The technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present invention. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments.

[0024] Reference Figures 1-10 A special rolling equipment for facilitating the addition and reduction of diameter of aluminum and aluminum alloys includes an uncoiling structure 1, a guiding structure 2, and an addition and reduction of diameter structure 3. The guiding structure 2 consists of two sets, which are arranged on both sides of the addition and reduction of diameter structure 3 for guiding the addition before and after the reduction of diameter. The uncoiling structure 1 is arranged on one side of the guide structure 2 before the reduction of diameter for uncoiling the addition.

[0025] The additive manufacturing variable diameter structure 3 includes a variable diameter mold 13, which has a lubricating powder guide cylinder 10 inside. The end of the variable diameter mold 13 is sealed by a cover plate 11 to limit the lubricating powder. The lubricating powder guide cylinder 10 has a rotatable spiral blade 22 inside. The spiral blade 22 has a first feeding hole 24, a cleaning hole 25 and a second feeding hole 26 coaxially arranged in the middle. After the additive material passes through the first feeding hole 24, the cleaning hole 25 and the second feeding hole 26, it is uniformly coated with lubricating powder and then drawn and changed in diameter by the variable diameter mold 13.

[0026] In this embodiment, the unwinding structure 1 is used for the continuous unwinding of aluminum and aluminum alloy additive raw materials. A magnetic powder brake can be used to control the unwinding tension to ensure that the additive maintains a constant tension during the conveying process, avoiding slack, deviation, or excessive stretching. The guide structure 2 consists of multiple sets of guide wheels and limiting guide sleeves, which are used to smoothly and centrally feed the additive into the additive diameter changing structure 3, ensuring that the additive, the lubricating powder guide cylinder 10, and the diameter changing mold 13 maintain coaxiality, improving the dimensional accuracy and surface quality of the diameter changing. The rear guide structure 2 is also used for the subsequent conveying of the diameter changing additive.

[0027] The additive manufacturing variable diameter structure 3 also includes a base 4, on which a bracket 5 is mounted. A lubricating powder container 12 is fixed to the bracket 5 via clamps. The variable diameter mold 13 is coaxially arranged with and integrally formed with the lubricating powder container 12. The base 4 is made of cast iron or thick-walled steel plate to ensure the stability of the equipment operation. The bracket 5 is a symmetrical support structure, fixed to the base 4 with bolts, used to stably support the lubricating powder container 12 and prevent rotation or vibration from causing coaxiality deviation. The lubricating powder container 12 is a cylindrical cavity used to store solid lubricating powder. It is made of stainless steel or aluminum alloy, with a smooth, non-sticky inner wall to facilitate the flow and cleaning of lubricating powder. The variable diameter mold 13 is made of hard alloy, with its inner hole precision ground and polished to ensure high dimensional accuracy and a smooth, scratch-free surface after aluminum and aluminum alloy additive drawing.

[0028] The cover plate 11 is equipped with a threaded connector, and the inner wall of the lubricating powder container 12 is equipped with a threaded interface. The threaded connector and the threaded interface are threadedly connected. The lubricating powder guide cylinder 10 passes through the cover plate 11 and is fixedly connected to it. The cover plate 11 is detachably connected by threads, which facilitates disassembly and maintenance, cleaning of residual lubricating powder, or replacement of internal vulnerable parts. The threaded connection has good sealing performance, which can reduce lubricating powder leakage and dust. The lubricating powder guide cylinder 10 and the cover plate 11 are fixed by interference fit or welding to ensure connection strength and coaxiality, and there is no loosening or offset during operation.

[0029] A rotating ring 16 is rotatably connected to one end of the lubricating powder guide cylinder 10. A connecting ring 17 is fixed to the inner wall of the rotating ring 16. The connecting ring 17 is connected to the spiral blade 22 through two connecting rods 23. The rotating ring 16 achieves rotational engagement with the lubricating powder guide cylinder 10 through bearings, resulting in low rotational resistance and high stability. The connecting ring 17 and the rotating ring 16 are an integral structure, and the connecting rods 23 are symmetrically distributed, resulting in uniform force distribution. This can stably drive the spiral blade 22 to rotate synchronously, avoiding eccentric wear caused by unilateral force.

[0030] A reducer 6 is mounted on the base 4. The output end of the reducer 6 is connected to a drive shaft 7. A transmission wheel 14 is mounted on the drive shaft 7 and the rotating ring 16. The two transmission wheels 14 are connected by a transmission belt 8. The reducer 6 uses a variable frequency geared motor, which can adjust the output speed according to the additive manufacturing specifications and processing speed to match the lubricating powder application speed with the drawing speed. The transmission wheel 14 and the transmission belt 8 can be connected by synchronous belt drive or gear drive to ensure transmission accuracy, avoid slippage, and ensure that the speed of the spiral blade 22 is stable and controllable.

[0031] A guide tube 9 is fixedly connected to the rotating ring 16, and a coaxial rubber ring 15 is fixed to the inner wall of the guide tube 9. The guide tube 9 is used for guiding and centering the additive before it enters the lubricating powder guide cylinder 10; the rubber ring 15 is made of elastic and wear-resistant material, which can adapt to small deviations in the diameter of the additive, and at the same time plays a role in buffering and preventing scratches, so as to avoid the surface of the additive being scratched by hard parts; a sealing structure is formed between the rubber ring 15 and the additive to prevent the lubricating powder from leaking through the guide tube 9.

[0032] Both the first feeding hole 24 and the second feeding hole 26 are tapered, with the inner diameter of the opposite end of the first feeding hole 24 and the second feeding hole 26 being larger than the inner diameter of the adjacent ends. The tapered hole structure can guide the lubricating powder to gather on the additive surface, improving the coating uniformity; the larger diameter end facilitates the entry of lubricating powder, while the smaller diameter end increases the powder density, allowing the lubricating powder to adhere more tightly to the additive surface.

[0033] The cleaning hole 25 is located between the first feeding hole 24 and the second feeding hole 26, and is coaxially arranged with the first feeding hole 24 and the second feeding hole 26. The inner diameter of the cleaning hole 25 is slightly larger than the outer diameter of the additive manufacturing process. It can scrape off and re-disperse excess and clumps of lubricating powder on the surface of the additive manufacturing process, ensuring a uniform coating thickness and preventing powder from falling off and clogging the mold during drawing due to excessive thickness in some areas. At the same time, it can scrape off foreign objects on the surface of the additive manufacturing process, ensuring that no foreign objects will affect the wire drawing operation of the additive manufacturing process when the diameter changes.

[0034] A feed hopper 18 is installed through the upper end of the lubricating powder guide cylinder 10. A support rod 20 is fixed on the spiral blade 22, and a digging hopper 19 is fixed to the end of the support rod 20. The digging hopper 19 is used to scoop up the lubricating powder and pour it into the feed hopper 18. The feed hopper 18 is funnel-shaped with a large upper opening and a small lower opening, which facilitates the receipt of lubricating powder conveyed by the digging hopper 19 and guides it into the lubricating powder guide cylinder 10. The digging hopper 19 rotates synchronously with the spiral blade 22, continuously lifting and conveying the lubricating powder at the bottom of the lubricating powder container 12, realizing the recycling of lubricating powder, avoiding bottom sedimentation and agglomeration, and ensuring continuous and stable powder supply.

[0035] The upper end of the feed hopper 18 is provided with a through groove 21 along the direction of the digging hopper 19's movement trajectory, allowing the digging hopper 19 to move through the through groove 21. The through groove 21 is an arc-shaped long groove, the size of which matches the movement trajectory of the digging hopper 19, ensuring smooth passage of the digging hopper 19 while reducing the leakage of lubricating powder from the gaps in the groove. Since the lubricating powder is confined within the lubricating powder container 12, the cover plate 11, and the variable diameter mold 13, dust pollution can be effectively reduced, improving the working environment.

[0036] In use, the aluminum and aluminum alloy additive rolls are mounted on the unwinding structure 1, and the additive end is passed sequentially through the guide structure 2, guide tube 9, rubber ring 15, first feeding hole 24, cleaning hole 25, and second feeding hole 26, and finally passed into the variable diameter mold 13, through the guide structure 2 and connected to the external traction mechanism.

[0037] When the reducer 6 is started, power is transmitted to the rotating ring 16 via the drive shaft 7, transmission wheel 14, and transmission belt 8, driving the connecting ring 17, connecting rod 23, and spiral blade 22 to rotate synchronously. When the spiral blade 22 rotates, it pushes the lubricating powder to flow axially. After passing through the conical first feeding hole 24, the lubricating powder can be evenly coated on the surface of the additive. When the additive passes through the cleaning hole 25, the surface of the additive can be cleaned to avoid foreign objects on the surface of the additive. At the same time, a thin layer of lubricating powder can be formed on the surface of the additive after passing through the cleaning hole 25. When the additive passes through the second feeding hole 26, the spiral blade 22 pushes the lubricating powder to flow axially, which can ensure that the lubricating powder is evenly coated on the surface of the additive. On the other hand, the support rod 20 drives the digging hopper 19 to rotate, continuously lifting the lubricating powder in the lubricating powder container 12 and sending it into the lubricating powder guide cylinder 10 through the feeding hopper 18, realizing the circulation supply of lubricating powder.

[0038] The additive material passes through the lubricating powder guide cylinder 10 at a uniform speed under the action of the traction mechanism. After being uniformly coated with a layer of lubricating powder, it enters the diameter-changing die 13, where continuous rolling and drawing for diameter change are completed. The cleaning hole 25 can scrape off excess lubricating powder from the additive surface in real time and break up clumps of powder, ensuring a uniform and stable coating. The conical hole structure enhances the adhesion of lubricating powder, reduces powder shedding during drawing, and lowers the risk of die wear and additive breakage. Since the lubricating powder is recycled within a closed cavity, there is no large amount of dust leakage, which can significantly reduce occupational health risks and environmental treatment costs.

[0039] After the equipment is shut down, the cover plate 11 can be unscrewed to remove the entire lubricating powder guide cylinder 10. The internal spiral blades 22, feeding holes, cleaning holes, and inner walls of the cavity can be thoroughly cleaned to prevent residual lubricating powder from hardening and clumping, which could affect the next use. The guide tube 9 and rubber ring 15 can be quickly replaced according to different diameter additive manufacturing processes, improving the equipment's versatility and meeting the needs of multi-specification aluminum and aluminum alloy additive manufacturing with variable diameters.

[0040] As another embodiment of the present invention, a vibrator can be installed on the outer wall of the lubricating powder container 12 to prevent bridging and blockage of the lubricating powder through micro-vibration, thus ensuring smooth powder supply; at the same time, an air-cooling or water-cooling device can be installed at the outlet of the variable diameter mold 13 to remove the heat generated by drawing in time, avoid softening and deformation of the additive manufacturing due to temperature rise, and improve dimensional stability.

[0041] In another embodiment of the present invention, the spiral blade 22 can be configured as a detachable structure, and spiral blades with different pitches and blade heights can be replaced according to the additive diameter and the type of lubricating powder to optimize the lubricating powder delivery and coating effect; a tension adjusting wheel can be added to the transmission system to ensure that the transmission belt 8 has moderate tension, extend its service life, and reduce the maintenance frequency.

[0042] As another embodiment of the present invention, a laser diameter measuring instrument can be added to the guide structure 2 to monitor the additive diameter in real time, feed the signal back to the variable frequency reduction motor, and automatically adjust the speed of the spiral blade 22 and the amount of lubricating powder coating to realize fully automated control of the diameter change process, thereby improving processing accuracy and production efficiency.

[0043] This invention achieves uniform and continuous coating of lubricating powder through the combination of a rotating spiral blade and a conical feeding hole, solving the problems of coating dead corners and uneven thickness in traditional powder coating methods. The closed-loop powder supply structure significantly reduces lubricating powder leakage and dust pollution, thereby reducing occupational health risks and environmental costs. The cleaning hole levels the coating in real time, reducing drawing breakage and mold wear, and improving yield and production stability. The overall structure is compact, easy to disassemble and maintain, and highly versatile, suitable for continuous variable diameter processing of various specifications of aluminum and aluminum alloy additive manufacturing.

[0044] The above description is only a preferred embodiment of the present invention, but the scope of protection of the present invention is not limited thereto. Any equivalent substitutions or modifications made by those skilled in the art within the scope of the technology disclosed in the present invention, based on the technical solution and inventive concept of the present invention, should be covered within the scope of protection of the present invention.

Claims

1. A special rolling equipment for facilitating the addition and reduction of diameter of aluminum and aluminum alloys, comprising an uncoiling structure (1) and a guiding structure (2), characterized in that, It also includes additive variable diameter structures (3); The additive manufacturing variable diameter structure (3) includes a variable diameter mold (13), which has a lubricating powder guide cylinder (10) inside. One end of the variable diameter mold (13) is sealed by a cover plate (11) to limit the lubricating powder. The lubricating powder guide cylinder (10) has a rotatable spiral blade (22) inside. The spiral blade (22) has a first feeding hole (24), a cleaning hole (25) and a second feeding hole (26) coaxially arranged in the middle. The first feeding hole (24) and the second feeding hole (26) are both conical. The inner diameter of the opposite end of the first feeding hole (24) and the second feeding hole (26) is larger than the inner diameter of the near end of the two. The inner diameter of the cleaning hole (25) is slightly larger than the outer diameter of the additive. It can scrape off the excess and clump of lubricating powder on the surface of the additive and re-disperse it. After the additive passes through the first feeding hole (24), the cleaning hole (25) and the second feeding hole (26), it is evenly coated with lubricating powder and then drawn and changed in diameter by the variable diameter mold (13). The cleaning hole (25) is located between the first feeding hole (24) and the second feeding hole (26), and the cleaning hole (25) is coaxially arranged with the first feeding hole (24) and the second feeding hole (26); the upper end of the lubricating powder guide cylinder (10) is connected to the feed hopper (18), the spiral blade (22) is fixed with a support rod (20), and the end of the support rod (20) is fixed with a digging hopper (19). The digging hopper (19) is used to dig up the lubricating powder and pour it into the feed hopper (18); the upper end of the feed hopper (18) is provided with a through groove (21) along the direction of the movement trajectory of the digging hopper (19), and the digging hopper (19) can move through the through groove (21); The hopper rotates synchronously with the spiral blade, continuously lifting and conveying the lubricating powder at the bottom of the lubricating powder container, thus realizing the recycling of the lubricating powder.

2. The special rolling equipment for easy diameter change in additive manufacturing of aluminum and aluminum alloys according to claim 1, characterized in that, The additive variable diameter structure (3) also includes a base (4), on which a bracket (5) is installed. A lubricating powder container (12) is fixed on the bracket (5) by a clamp. The variable diameter mold (13) and the lubricating powder container (12) are coaxially arranged and integrally formed.

3. The special rolling equipment for easy diameter change in aluminum and aluminum alloy additive manufacturing according to claim 2, characterized in that, The cover plate (11) is provided with a threaded joint, and the inner wall of the lubricating powder container (12) is provided with a threaded interface. The threaded joint is threadedly connected to the threaded interface, and the lubricating powder guide cylinder (10) passes through the cover plate (11) and is fixedly connected to it.

4. A special rolling equipment for easy diameter change in additive manufacturing of aluminum and aluminum alloys according to claim 2, characterized in that, One end of the lubricating powder guide cylinder (10) is rotatably connected to a rotating ring (16), and a connecting ring (17) is fixed on the inner wall of the rotating ring (16). The connecting ring (17) is connected to the spiral blade (22) through two connecting rods (23).

5. A special rolling equipment for easy diameter change in additive manufacturing of aluminum and aluminum alloys according to claim 4, characterized in that, A speed reducer (6) is installed on the base (4). The output end of the speed reducer (6) is connected to a drive shaft (7). A transmission wheel (14) is installed on the drive shaft (7) and the rotating ring (16). The two transmission wheels (14) are connected by a transmission belt (8).

6. A special rolling equipment for easy diameter change in additive manufacturing of aluminum and aluminum alloys according to claim 4, characterized in that, A guide tube (9) is fixedly connected to the rotating ring (16), and a coaxial rubber ring (15) is fixed to the inner wall of the guide tube (9).

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