Aluminum wire plasticizing device for 3D printing

Abstract

The application discloses a kind of aluminium wire plasticizing device for 3D printing, it is related to 3D printing technical field, including rotating cylinder, the lower end of the rotating cylinder is provided with permanent magnet.The application is integrated in the coil inner wall of rotating cylinder, and coaxial sleeve is set on the outside of aluminium wire body, ensure that the rotating magnetic field formed after coil energization can accurately act on the permanent magnet of lower end, drive permanent magnet to rotate stably;Permanent magnet is engaged with aluminium wire body by screw thread, can drive aluminium wire body stable axial conveying when rotating, and can also apply uniform axial pressure by the spiral transmission of screw thread;At the same time, the relative rotation of permanent magnet and the lower end of rotating cylinder generates friction heat, heat is directly transmitted to aluminium wire body, realize the integration of heating, pressurizing and conveying function synchronization, greatly improve the uniformity and efficiency of aluminium wire plasticizing, avoid the problem that traditional separate structure exists large heat loss, plasticizing synergy is poor.

Description

Technical Field

[0001] This invention relates to the field of 3D printing technology, and more particularly to an aluminum wire plasticizing device for 3D printing. Background Technology

[0002] In the field of metal 3D printing, aluminum and aluminum alloys, with their advantages of lightweight, high strength, and good thermal and electrical conductivity, have become the preferred materials for aerospace, automotive manufacturing, and other fields. As the core pre-processing equipment for aluminum filament 3D printing, the performance of the aluminum filament shaping device directly determines the printing accuracy, efficiency, and finished product quality. Currently, most aluminum filament shaping devices on the market adopt a traditional "separate" design, meaning that the functional modules for filament feeding, heating, guiding, and fixing are independent of each other.

[0003] However, in the existing technology, the heating mechanism and the filament feeding mechanism of the device are independent of each other, resulting in a long heat transfer path and large losses. Furthermore, it is difficult to precisely coordinate the heating rhythm and the filament feeding speed, which often leads to problems such as local overheating and carbonization of the aluminum filament or insufficient plasticization. At the same time, the filament feeding driving force mostly relies on the extrusion transmission of external motors and rollers, which is prone to fluctuations in aluminum filament delivery due to uneven pressure, further affecting the uniformity of plasticization and failing to meet the requirements of high-precision printing for plasticization quality. Therefore, an aluminum filament plasticization device for 3D printing is proposed. Summary of the Invention

[0004] The purpose of this invention is to solve the problems existing in the prior art and to propose an aluminum wire plasticizing device for 3D printing.

[0005] To achieve the above objectives, the present invention adopts the following technical solution: an aluminum wire plasticizing device for 3D printing, comprising a rotating cylinder, a permanent magnet being provided at the lower end of the rotating cylinder, an aluminum wire body being inserted inside the rotating cylinder and the permanent magnet, multiple sets of coils being installed on the inner wall of the rotating cylinder, and threads being provided on the inner wall of the permanent magnet.

[0006] Preferably, the multiple sets of coils are located on the outside of the aluminum wire body, and the inner wall of the thread is in contact with the outer wall of the aluminum wire body.

[0007] Preferably, the outer wall of the rotating cylinder is equipped with two sets of fixed circular seats, and each set of fixed circular seats is equipped with a No. 1 frame.

[0008] Preferably, the outer wall of the permanent magnet is rotatably mounted with two sets of annular seats, and the outer wall of each set of annular seats is mounted with a second frame.

[0009] Preferably, one end of each of the two sets of No. 1 frame bases and the two sets of No. 2 frame bases is equipped with a mounting plate.

[0010] Preferably, a vertical plate is installed on the upper end of one of the first sets of the frame, and four sets of round rods are sleeved on the outer wall of the aluminum wire body. Semicircular sleeves are rotatably installed on the outer wall of each of the four sets of round rods, and two sets of connecting rods are welded to the outer wall of each of the four sets of round rods.

[0011] Preferably, the four sets of semicircular sleeves are fitted onto the outer wall of the aluminum wire body, and the other end of each of the eight sets of connecting rods is fixed to one end of the vertical plate.

[0012] Compared with the prior art, the advantages and positive effects of the present invention are as follows: 1. In this invention, by integrating the coil into the inner wall of the rotating cylinder and coaxially sleeved on the outside of the aluminum wire body, it is ensured that the rotating magnetic field formed after the coil is energized can accurately act on the permanent magnet at the lower end, driving the permanent magnet to rotate stably. The permanent magnet engages with the aluminum wire body through threads, and when rotating, it can not only drive the aluminum wire body to be stably axially transported, but also apply uniform axial pressure through the spiral transmission of the threads. At the same time, the relative rotation between the permanent magnet and the lower end of the rotating cylinder generates frictional heat, which is directly transferred to the aluminum wire body, realizing the integrated synchronization of heating, pressurization and transport functions, greatly improving the uniformity and efficiency of aluminum wire plasticization, and avoiding the problems of large heat loss and poor plasticization synergy in traditional separate structures.

[0013] 2. In this invention, by adopting a symmetrical combination structure of fixed circular seat, first frame seat, annular seat, and second frame seat, it is possible to achieve stable radial positioning of the rotating cylinder and guide the rotation of the permanent magnet through the bearing structure of the annular seat, thus ensuring the stability of the device during operation. At the same time, through the integrated assembly design of the mounting plate, the entire device can be quickly docked and fixed with the 3D printing equipment, greatly simplifying the installation process and improving the versatility and assembly efficiency of the device.

[0014] 3. In this invention, four sets of circumferentially distributed semicircular sleeves pre-guide the aluminum wire body to ensure the coaxiality of the aluminum wire body when it enters the rotating cylinder and the permanent magnet, avoiding conveying jams or uneven plasticization caused by aluminum wire misalignment. At the same time, the rolling friction design between the semicircular sleeves and the aluminum wire body effectively reduces the wear on the surface of the aluminum wire body during the guiding process. Combined with the trapezoidal thread structure of the threaded connection, it further reduces the indentation damage on the surface of the aluminum wire, improves the conveying accuracy and surface quality of the aluminum wire, and reduces material waste. Attached Figure Description

[0015] Figure 1 This invention provides a three-dimensional structural schematic diagram of an aluminum wire plasticizing device for 3D printing; Figure 2 A side view of an aluminum wire plasticizing device for 3D printing is provided in this invention; Figure 3 The present invention provides a top view of the rotating cylinder of an aluminum wire plasticizing device for 3D printing; Figure 4 This invention presents a schematic diagram of the permanent magnet and the annular seat of an aluminum wire plasticizing device for 3D printing.

[0016] Legend: 1. Rotating cylinder; 2. Permanent magnet; 3. Aluminum wire body; 4. Frame No. 1; 5. Frame No. 2; 6. Mounting plate; 7. Fixed round seat; 8. Circular seat; 10. Coil; 11. Vertical plate; 12. Round rod; 13. Semicircular sleeve; 14. Connecting rod; 15. Thread. Detailed Implementation

[0017] To better understand the above-mentioned objectives, features, and advantages of the present invention, the present invention will be further described below in conjunction with the accompanying drawings and embodiments. It should be noted that, unless otherwise specified, the embodiments and features described in these embodiments can be combined with each other.

[0018] Numerous specific details are set forth in the following description in order to provide a full understanding of the invention. However, the invention may also be practiced in other ways than those described herein, and therefore the invention is not limited to the specific embodiments disclosed in the following specification.

[0019] Example 1: As Figure 1 , Figure 2 , Figure 3 and Figure 4 As shown, the present invention provides an aluminum wire plasticizing device for 3D printing, including a rotating cylinder 1, a permanent magnet 2 at the lower end of the rotating cylinder 1, an aluminum wire body 3 inserted inside the rotating cylinder 1 and the permanent magnet 2, multiple sets of coils 10 installed on the inner wall of the rotating cylinder 1, and a threaded fastener 15 provided on the inner wall of the permanent magnet 2. The multiple sets of coils 10 are located on the outer side of the aluminum wire body 3, and the inner wall of the threaded fastener 15 is in contact with the outer wall of the aluminum wire body 3.

[0020] The specific setup and function of this embodiment will be described in detail below. The load-bearing drive component is the core functional component of the device, responsible for realizing magnetic field drive, frictional heating, aluminum wire conveying, and pressurization and plasticization. It mainly consists of a rotating cylinder 1, a permanent magnet 2, a coil 10, and a threaded fastener 15. The rotating cylinder 1 is a hollow cylindrical structure and serves as the core load-bearing component of the device. Its interior is the conveying channel for the aluminum wire body 3 and also provides an installation carrier for the coil 10. Multiple sets of coils 10 are evenly spaced along the axial direction on the inner wall of the rotating cylinder 1. All sets of coils 10 are in a ring structure and are coaxially sleeved on the outside of the aluminum wire body 3, ensuring that the coils 10 can form a uniform rotating magnetic field around the aluminum wire body 3 after being energized.

[0021] The permanent magnet 2 is fitted and installed at the lower end of the rotating cylinder 1, coaxially arranged with the rotating cylinder 1. Its overall structure is annular, and its inner wall forms a rotatable fit with the outer wall of the lower end of the rotating cylinder 1. The inner wall of the permanent magnet 2 is integrally formed with threads 15, which adopt a trapezoidal thread structure. The aluminum wire body 3 passes through the central channel of the permanent magnet 2. The inner wall of the threads 15 is in close contact and meshing with the outer wall of the aluminum wire body 3, ensuring that the aluminum wire body 3 can be driven to move axially through the helical transmission of the threads 15 when the permanent magnet 2 rotates. The aluminum wire body 3 passes through the interior of the rotating cylinder 1 and the permanent magnet 2, and is the core consumable for 3D printing. Its axis coincides with the axis of the rotating cylinder 1 and the permanent magnet 2, ensuring coaxiality during the conveying process.

[0022] Example 2: Figure 1 , Figure 2 , Figure 3 and Figure 4 As shown, two sets of fixed circular seats 7 are installed on the outer wall of the rotating cylinder 1. A first frame 4 is installed on the outer wall of each of the two sets of fixed circular seats 7. Two sets of circular ring seats 8 are rotatably installed on the outer wall of the permanent magnet 2. A second frame 5 is installed on the outer wall of each of the two sets of circular ring seats 8. An installation plate 6 is installed at one end of each of the two sets of first frame seats 4 and the two sets of second frame seats 5.

[0023] The overall effect of this embodiment is that two sets of fixed round seats 7 are symmetrically installed on the outer wall of the rotating cylinder 1 near the upper and lower ends. The fixed round seats 7 adopt an annular clamping structure and are fixed to the outer wall of the rotating cylinder 1 by bolts to achieve radial positioning of the rotating cylinder 1. A first frame seat 4 is uniformly fixed along the circumference on the outer wall of both sets of fixed round seats 7. The first frame seat 4 adopts an L-shaped plate structure, one end of which is welded and fixed to the fixed round seat 7, and the other end extends to the outside of the device.

[0024] Two sets of annular seats 8 are rotatably mounted on the outer wall of the permanent magnet 2, corresponding to the position of the fixed circular seat 7. The annular seats 8 adopt a ring bearing structure, and their inner walls are rotatably engaged with the outer wall of the permanent magnet 2 through ball bearings, which not only achieves radial limitation of the permanent magnet 2, but also does not affect the rotational movement of the permanent magnet 2. The outer walls of the two sets of annular seats 8 are also uniformly fixed with second-stage support seats 5 along the circumference. The structure of the second-stage support seats 5 is the same as that of the first-stage support seats 4, ensuring the symmetry of the device structure. The two sets of first-stage support seats 4 and the two sets of second-stage support seats 5 are all fixed with a mounting plate 6 at the end away from the center of the device. The mounting plate 6 is a rectangular flat plate structure with multiple evenly distributed mounting holes. The entire device can be quickly assembled and fixed in the designated position of the 3D printing equipment through the mounting holes, improving the ease of installation of the device.

[0025] Example 3: Figure 1 and Figure 3As shown, a vertical plate 11 is installed on the upper end of one of the first frame bases 4. Four sets of round rods 12 are sleeved on the outer wall of the aluminum wire body 3. Semicircular sleeves 13 are rotatably installed on the outer wall of each of the four sets of round rods 12. Two sets of connecting rods 14 are welded to the outer wall of each of the four sets of round rods 12. The four sets of semicircular sleeves 13 are sleeved on the outer wall of the aluminum wire body 3. The other end of each of the eight sets of connecting rods 14 is fixed to one end of the vertical plate 11.

[0026] The overall effect of this embodiment is that a vertical plate 11 is vertically welded to the upper end of one set of frame 4. The vertical plate 11 is a rectangular plate structure, and its surface is perpendicular to the conveying direction of the aluminum wire body 3. Four sets of round rods 12 are sleeved on the outer wall of the aluminum wire body 3 corresponding to the position of the vertical plate 11. The four sets of round rods 12 are evenly distributed along the circumference of the aluminum wire body 3. A semi-circular sleeve 13 is rotatably sleeved on the outer wall of each set of round rods 12. The inner wall of the semi-circular sleeve 13 adopts an arc-shaped fitting structure to fit and conform to the outer wall of the aluminum wire body 3.

[0027] Each set of round rods 12 has connecting rods 14 symmetrically welded to both ends of its outer wall. The ends of the eight sets of connecting rods 14 away from the round rods 12 are welded and fixed to one side of the vertical plate 11 to form a stable frame-type guide structure. The four sets of semicircular sleeves 13 together form a circular guide channel that is compatible with the aluminum wire body 3. The semicircular sleeves 13 can rotate synchronously with the conveying of the aluminum wire body 3 to reduce wear on the surface of the aluminum wire body 3.

[0028] The usage and working principle of this device are as follows: First, the aluminum wire body 3 is passed sequentially through the guide channel formed by the four sets of semi-circular sleeves 13 of the guide positioning component, the internal channel of the rotating cylinder 1, and the threaded channel 15 of the permanent magnet 2, ensuring that the aluminum wire body 3, the rotating cylinder 1, and the permanent magnet 2 remain coaxial. During this process, the vertical plate 11, through the four sets of round rods 12 and semi-circular sleeves 13 fixed by the connecting rod 14, plays a precise pre-guiding and radial limiting role for the aluminum wire body 3, preventing the aluminum wire body 3 from shifting or tilting, thus laying the foundation for subsequent stable conveying and plasticizing. At the same time, the entire device is fixed to the designated work position of the 3D printing equipment by the mounting plate 6, completing the preliminary assembly preparation.

[0029] Then, after the device is started, an alternating current is passed through multiple sets of coils 10 installed on the inner wall of the rotating cylinder 1. Since the multiple sets of coils 10 are evenly distributed along the axial direction of the rotating cylinder 1 and coaxially sleeved on the outside of the aluminum wire body 3, after the alternating current is passed through, the multiple sets of coils 10 work together to form a rotating magnetic field around the aluminum wire body 3. The magnetic field direction of this rotating magnetic field extends downward along the axial direction of the aluminum wire body 3, precisely covering the area where the permanent magnet 2 is located at the lower end of the rotating cylinder 1, providing driving force for the rotation of the permanent magnet 2, and the magnetic field strength can be precisely controlled by adjusting the current of the coils 10.

[0030] When the rotating magnetic field generated by coil 10 acts on permanent magnet 2, according to the principle of electromagnetic induction, the magnetic field will generate a circumferential electromagnetic torque on permanent magnet 2, driving permanent magnet 2 to rotate at a constant speed around the axis of aluminum wire body 3. In this process, the two sets of annular seats 8 on the outer wall of permanent magnet 2 play a key role: the annular seats 8 adopt a bearing structure, and their inner wall and the outer wall of permanent magnet 2 are connected by ball bearings, which not only provides stable radial positioning for permanent magnet 2 and prevents eccentric wobbling when permanent magnet 2 rotates, but also converts the sliding friction between permanent magnet 2 and annular seats 8 into rolling friction, which greatly reduces rotational resistance and component wear, and ensures the smoothness and continuity of rotation of permanent magnet 2.

[0031] When the permanent magnet 2 rotates, the threads 15 on its inner wall are tightly engaged with the outer wall of the aluminum wire body 3. Since the threads 15 adopt a trapezoidal thread structure and the aluminum wire body 3 is limited by the guide component and cannot rotate with it, the rotational motion of the permanent magnet 2 is converted into the axial linear motion of the aluminum wire body 3 through the helical transmission of the threads 15, which drives the aluminum wire body 3 to be conveyed downward at a uniform speed (i.e., the wire feeding process of "pulling down"). At the same time, the rotating magnetic field generated by the coil 10 not only provides circumferential driving force, but also generates an axial attraction force on the permanent magnet 2, so that the permanent magnet 2 is tightly attached to the lower end face of the rotating cylinder 1. This attraction force and the axial propulsion force generated by the helical transmission of the threads 15 are superimposed to apply uniform axial pressure to the aluminum wire body 3, providing pressure guarantee for subsequent plasticization.

[0032] Finally, during the rotation of the permanent magnet 2, its upper end face and the lower end face of the rotating cylinder 1 undergo relative sliding friction. According to the principle of frictional heat generation, the heat generated by the relative friction is transferred to the aluminum wire body 3 through the rotating cylinder 1 and the permanent magnet 2. Since the heat acts directly on the conveying path of the aluminum wire body 3, the heat loss is small and the temperature of the aluminum wire body 3 can be quickly increased. At the same time, the aluminum wire body 3 is continuously subjected to axial pressure during the downward conveying process. Under the synergistic effect of "heat + pressure", the aluminum wire body 3 gradually softens and completes plasticization, forming a molten aluminum wire material. Finally, the plasticized aluminum wire material is output from the lower end of the permanent magnet 2 and directly enters the printing nozzle of the 3D printing equipment, providing a stable supply of consumables for subsequent 3D printing molding.

[0033] The above are merely preferred embodiments of the present invention and are not intended to limit the present invention in any other way. Any person skilled in the art may make changes or modifications to the above-disclosed technical content to create equivalent embodiments that can be applied to other fields. However, any simple modifications, equivalent changes, and modifications made to the above embodiments based on the technical essence of the present invention without departing from the scope of the present invention shall still fall within the protection scope of the present invention.

Claims

1. A device for plasticizing aluminum wire for 3D printing, characterized in that: It includes a rotating cylinder (1), a permanent magnet (2) is provided at the lower end of the rotating cylinder (1), an aluminum wire body (3) is inserted inside the rotating cylinder (1) and the permanent magnet (2), multiple sets of coils (10) are installed on the inner wall of the rotating cylinder (1), and a thread (15) is provided on the inner wall of the permanent magnet (2).

2. The aluminum wire plasticizing device for 3D printing according to claim 1, characterized in that: Multiple sets of coils (10) are located on the outside of the aluminum wire body (3), and the inner wall of the thread (15) is in contact with the outer wall of the aluminum wire body (3).

3. The aluminum wire plasticizing device for 3D printing according to claim 1, characterized in that: The outer wall of the rotating cylinder (1) is equipped with two sets of fixed round seats (7), and the outer wall of each set of fixed round seats (7) is equipped with a No. 4 frame.

4. The aluminum wire plasticizing device for 3D printing according to claim 3, characterized in that: The outer wall of the permanent magnet (2) is rotatably mounted with two sets of ring seats (8), and the outer wall of both sets of ring seats (8) is mounted with a second frame seat (5).

5. The aluminum wire plasticizing device for 3D printing according to claim 4, characterized in that: Mounting plates (6) are installed at one end of both sets of No. 1 frame (4) and both sets of No. 2 frame (5).

6. The aluminum wire plasticizing device for 3D printing according to claim 3, characterized in that: One of the first set of the frame (4) has a vertical plate (11) installed on its upper end. The outer wall of the aluminum wire body (3) is fitted with four sets of round rods (12). The outer walls of the four sets of round rods (12) are rotatably fitted with semi-circular sleeves (13). The outer walls of the four sets of round rods (12) are welded with two sets of connecting rods (14).

7. The aluminum wire plasticizing device for 3D printing according to claim 6, characterized in that: The four sets of semicircular sleeves (13) are fitted onto the outer wall of the aluminum wire body (3), and the other end of the eight sets of connecting rods (14) is fixed to one end of the vertical plate (11).

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