Additive manufacturing apparatus

Abstract

The invention discloses additive manufacturing equipment, and relates to the technical field of additive manufacturing, and the additive manufacturing equipment comprises a base, a telescopic adjusting mechanism, a printing head body, an elastic buffer part, a cooling nozzle and an air compression device; the telescopic adjusting mechanism is provided with a fixed part and a movable part, the fixed part is connected to the base, and the movable part is adjustably and slidably matched with the fixed part along a first path; the printing head body is in sliding fit with the movable part along a first path; the printing head body comprises a feeding assembly and a heating device. The feeding assembly conveys thermoplastic wires to the heating device and a printing area. The first end of the elastic buffer piece is connected with the movable part, and the second end is connected with the printing head body; the elastic buffer piece can prevent the printing head body from moving backwards on the first path; the cooling nozzle is connected to the printing head body; the air compression device supplies air to the printing area through the cooling nozzle. According to the scheme, fine position adjustment of the printing head on the feeding path can be achieved, and meanwhile the cooling forming effect of the printing supplies is improved.

Description

Technical Field

[0001] The present invention relates to the technical field of additive manufacturing, and in particular to additive manufacturing equipment. Background Art

[0002] Additive Manufacturing (AM), also known as 3D printing, is a manufacturing method that builds three-dimensional objects by adding material layer by layer. Unlike traditional subtractive manufacturing, AM eliminates the need for molds and can create complex parts directly from digital models. This makes it particularly suitable for small-batch, customized production, and for manufacturing parts with complex internal structures.

[0003] Currently, additive manufacturing equipment faces several challenges during the actual printing process. For one thing, the printhead's discharge path is difficult to precisely control; for another, the cooling of the printing consumables during the molding process is suboptimal. These issues make it difficult for existing additive manufacturing equipment to meet the precise control requirements for print position and path in high-precision printing tasks, and this in turn limits printing efficiency and quality. Summary of the Invention

[0004] The main purpose of the present invention is to propose an additive manufacturing device, which aims to achieve fine position adjustment of the print head on the feed path and improve the cooling and molding effect of the printing consumables.

[0005] To achieve the above-mentioned objectives, the additive manufacturing equipment proposed in the present invention includes:

[0006] base;

[0007] a telescopic adjustment mechanism, the telescopic adjustment mechanism comprising a fixed portion and a movable portion, the fixed portion being connected to the base, and the movable portion being adjustably slidably engaged with the fixed portion along a first path;

[0008] a print head body, the print head body being slidably engaged with the movable portion along the first path; the print head body comprising a feeding assembly and a heating device, the feeding assembly being used to sequentially convey the thermoplastic wire to the heating device and the printing area, the heating device being used to heat the thermoplastic wire into a molten state;

[0009] an elastic buffer member, wherein a first end of the elastic buffer member is connected to the movable portion, and a second end of the elastic buffer member is connected to the print head body; the elastic buffer member is used to prevent the print head body from moving backward along the first path under elastic force;

[0010] A cooling nozzle connected to the print head body;

[0011] An air compression device is connected to the cooling nozzle; the air compression device is used to supply air to the printing area through the cooling nozzle to cool and shape the molten thermoplastic wire.

[0012] The additive manufacturing equipment provided by the present invention, on the one hand, provides stable, uniform, wide-coverage, and adjustable airflow output through an air compression device, so that the airflow output by the cooling nozzle can accurately act on the target position of the molten thermoplastic wire in a preset manner, which can meet the cooling requirements of different printing positions and parts of complex shapes; on the other hand, this embodiment realizes fine position adjustment and effective buffering protection of the print head body on the feed path through the coordinated cooperation of the base, telescopic adjustment mechanism, print head body and elastic buffer member; in actual application, the operator can drive the movable part to move relative to the fixed part along the first path, and then drive the print head body through the elastic buffer member to achieve fine-tuning operation forward to the printing area or backward away from the printing area, so as to meet the precise requirements of the print head position for high-precision printing tasks; at the same time, when the print head body is subjected to external collision or impact, the elastic buffer member can absorb the impact energy, reduce damage to the print head body, and drive the print head body to quickly reset after the impact disappears, ensuring that the print head can continue to perform stable and accurate printing operations. Based on the above solution, the print head can be finely adjusted in its position on the feed path, while improving the cooling and forming effect of the thermoplastic wire, thereby improving printing efficiency and quality, broadening the scope of application of the equipment, and better meeting the needs of refined printing. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the following briefly introduces the drawings required for use in the embodiments or the description of the prior art. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on the structures shown in these drawings without paying any creative work.

[0014] Figure 1 A schematic diagram of the three-dimensional structure of an embodiment of the additive manufacturing equipment provided by the present invention;

[0015] Figure 2 A schematic front view of the structure of an embodiment of the additive manufacturing equipment provided by the present invention;

[0016] Figure 3 A partial perspective structural diagram of an embodiment of an additive manufacturing device provided by the present invention;

[0017] Figure 4 This is a schematic diagram of module connections of an embodiment of the additive manufacturing equipment provided by the present invention.

[0018] Description of Figure Numbers:

[0019] 1. Base; 101. First seat; 102. Second seat;

[0020] 2. Telescopic adjustment mechanism; 201. Fixed portion; 202. Movable portion; 2021. First limiting portion; 2022. Second limiting portion;

[0021] 3. Print head body; 301. Feeding assembly; 302. Heating device; 303. Mounting portion; 304. Heat dissipation device; 3011. First roller; 3012. Second roller; 3013. Extrusion drive device;

[0022] 4. Elastic buffer; 5. Cooling nozzle;

[0023] 6. Joint mechanism; 601. First connecting rod; 602. Second connecting rod; 603. Third connecting rod; 604. Clamping base; 605. First locking member; 606. Fourth connecting rod; 607. Fifth connecting rod; 6041. First clamping arm; 6042. Second clamping arm;

[0024] 7. Guide box; 701. Wiring channel;

[0025] 8. Air compression device; 9. Adjustment module; 10. Contour sensing device.

[0026] The purpose, features and advantages of the present invention will be further described with reference to the accompanying drawings and in conjunction with the embodiments. DETAILED DESCRIPTION

[0027] The following will clearly and completely describe the technical solutions in the embodiments of the present invention in conjunction with the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making any creative efforts shall fall within the scope of protection of the present invention.

[0028] It should be noted that if the embodiments of the present invention involve directional indications (such as up, down, left, right, front, back, etc.), the directional indications are only used to explain the relative position relationship, movement status, etc. between the components under a certain specific posture. If the specific posture changes, the directional indications will also change accordingly.

[0029] In addition, if there are descriptions involving "first", "second", etc. in the embodiments of the present invention, the descriptions of "first", "second", etc. are only for descriptive purposes and cannot be understood as indicating or suggesting their relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features limited to "first" and "second" may explicitly or implicitly include at least one of such features. In addition, if "and / or" or "and / or" appears in the full text, its meaning includes three parallel solutions. Taking "A and / or B" as an example, it includes solution A, solution B, or solutions that satisfy both A and B. In addition, the technical solutions between the various embodiments can be combined with each other, but it must be based on the ability of ordinary technicians in this field to implement. When the combination of technical solutions is mutually contradictory or cannot be implemented, it should be deemed that such a combination of technical solutions does not exist and is not within the scope of protection required by the present invention.

[0030] Additive Manufacturing (AM), also known as 3D printing, is a manufacturing method that builds three-dimensional objects by adding material layer by layer. Unlike traditional subtractive manufacturing, AM eliminates the need for molds and can create complex parts directly from digital models. This makes it particularly suitable for small-batch, customized production, and for manufacturing parts with complex internal structures.

[0031] Currently, additive manufacturing equipment faces several challenges during the actual printing process. For one thing, the printhead's discharge path is difficult to precisely control; for another, the cooling of the printing consumables during the molding process is suboptimal. These issues make it difficult for existing additive manufacturing equipment to meet the precise control requirements for print position and path in high-precision printing tasks, and this in turn limits printing efficiency and quality.

[0032] In order to solve the above problems, the present invention provides an additive manufacturing device, which aims to achieve fine position adjustment of the print head on the feed path and improve the cooling and molding effect of the printing consumables.

[0033] See also Figures 1 to 4 , the additive manufacturing equipment provided by the present invention includes:

[0034] Base 1;

[0035] The telescopic adjustment mechanism 2 includes a fixed portion 201 and a movable portion 202. The fixed portion 201 is connected to the base 1, and the movable portion 202 is adjustably slidably fitted on the fixed portion 201 along a first path.

[0036] The print head body 3 is slidably engaged with the movable portion 202 along a first path. The print head body 3 includes a feeding assembly 301 and a heating device 302. The feeding assembly 301 is used to sequentially convey the thermoplastic wire to the heating device 302 and the printing area. The heating device 302 is used to heat the thermoplastic wire into a molten state.

[0037] An elastic buffer 4, wherein a first end of the elastic buffer 4 is connected to the movable portion 202, and a second end of the elastic buffer 4 is connected to the print head body 3; the elastic buffer 4 is used to prevent the print head body 3 from moving backward along the first path under elastic force;

[0038] A cooling nozzle 5 is connected to the print head body 3;

[0039] The air compression device 8 is connected to the cooling nozzle 5; the air compression device 8 is used to supply air to the printing area through the cooling nozzle 5 to cool the molten thermoplastic wire into shape.

[0040] In this embodiment, the base 1 may refer to the outer shell, base, etc. of the additive manufacturing equipment that are used to provide an installation foundation; the base 1 may be connected to a driving component such as a robotic arm so that the base 1 and the print head body 3 set on the base 1 can be moved as a whole to a position close to the printing area through the driving component.

[0041] The fixed portion 201 can be mounted on the base 1 via a threaded connection or other connection method, serving as a support and guide for the movable portion 202. The movable portion 202 is configured to be slidably adjustable along a first path relative to the fixed portion 201, typically using a precision-machined slide rail, slide groove, or similar guide structure. In a specific implementation, the fixed portion 201 of the telescopic adjustment mechanism 2 can be configured to have a dovetail groove, T-slot, or other suitable sliding fit structure to match the corresponding structure of the movable portion 202. The movable portion 202 slides with the fixed portion 201 via a slider or other sliding component, ensuring that the movable portion 202 can move smoothly and precisely along the first path relative to the fixed portion 201.

[0042] The print head body 3 and the movable portion 202 can be connected by means of guide rails, slides, or sliders to achieve a sliding connection along the first path. The feed assembly 301 in the print head body 3 can continuously deliver the thermoplastic wire to the heating device 302 through extrusion or other means. The heating device 302 can heat the thermoplastic wire through electrical heating or other means, causing it to melt. The molten thermoplastic wire can then be further delivered to the printing area under the drive of the feed assembly 301.

[0043] The main function of the air compressor 8 is to provide power for air delivery, achieving high-speed airflow output through compressed air. The air compressor 8 can transport the airflow to the cooling nozzle 5 through corresponding pipes. The cooling nozzle 5 then sprays the airflow onto the molten thermoplastic wire in the printing area, causing the thermoplastic wire to cool and solidify, forming a workpiece with a predetermined shape. The air compressor 8 can provide a stable airflow output, ensuring that the air speed delivered by the cooling nozzle 5 is uniform and adjustable to meet the cooling requirements of different printing materials and shapes. For example, for PLA (Polylacticacid Fiber), ABS (Acrylonitrile Butadiene Styrene), and engineering plastics with special performance requirements, the air compressor 8 can achieve effective cooling by adjusting its output parameters. In addition, the air compressor 8 can generate high air pressure, allowing the cooling nozzle 5 to spray air over a longer distance, covering a larger cooling range. This ensures consistent cooling effect, especially for large or complex printed parts. In actual operation, the operator can flexibly adjust the output parameters of the air compression device 8 according to the specific printing task and material characteristics to achieve the best cooling effect.

[0044] The elastic buffer 4 can be a spring, elastic colloid, elastic plastic, or other device capable of providing an elastic force. In practice, the first end of the elastic buffer 4 can be directly or indirectly connected to the movable portion 202 via threaded connections, snap connections, welding, or bonding, and the second end of the elastic buffer 4 can also be directly or indirectly connected to the printhead body 3 via threaded connections, snap connections, welding, or bonding. The elastic buffer 4 serves to connect and transmit power between the movable portion 202 and the printhead body 3, and also to absorb and cushion the printhead body 3 in the event of a collision.

[0045] In the above description, the first path may refer to the feed path of the printhead body 3. When the movable portion 202 moves forward along the first path, the movable portion 202 drives the printhead body 3 toward the printing area via the elastic buffer 4. When the movable portion 202 moves backward along the first path, the movable portion 202 drives the printhead body 3 away from the printing area via the elastic buffer 4. During the process of the elastic buffer 4 driving the printhead body 3, the movable portion 202 provides a position-limiting and guiding effect on the printhead body 3. This prevents the printhead body 3 from lateral deviation from the first path during movement due to uncertainty in the deformation direction of the elastic buffer 4, thereby improving the positional accuracy of the printhead body 3 during movement along the first path.

[0046] Based on the above arrangement, during actual printing operations, when fine-tuning the position of the print head body 3 on the feed path (i.e., the first path) is required, the operator can use an external drive device or manually drive the movable portion 202 along the first path. The movable portion 202 can then, via the elastic buffer 4, drive the print head body 3 forward toward the printing area or backward away from the printing area. This allows for fine, precise adjustment of the position of the print head body 3, better meeting the requirements of high-precision printing tasks. During the movement of the print head body 3, if the print head body 3 is subjected to an external collision or impact in the printing area, the print head body 3 will move backward, squeezing or stretching the elastic buffer 4. The elastic buffer 4 can absorb some of the impact energy through its elastic deformation, acting as a buffer, thereby reducing damage to the print head body 3 caused by the collision. After the impact energy dissipates, the elastic force can drive the print head body 3 to quickly move forward and complete reset, allowing the print head body 3 to continue precise printing operations.

[0047] It can be seen that the additive manufacturing equipment provided in this embodiment, on the one hand, provides a stable, uniform, wide-coverage, and adjustable airflow output through the air compression device 8, so that the airflow output by the cooling nozzle 5 can accurately act on the target position of the molten thermoplastic wire in a preset manner, which can meet the cooling requirements of different printing positions and parts with complex shapes; on the other hand, this embodiment realizes fine position adjustment and effective buffering protection of the print head body 3 on the feed path through the coordinated cooperation of the base 1, the telescopic adjustment mechanism 2, the print head body 3 and the elastic buffer 4; in actual application, the operator can drive the movable portion 202 to move relative to the fixed portion 201 along the first path, and then drive the print head body 3 to achieve fine-tuning operation forward to the printing area or backward away from the printing area through the elastic buffer 4, so as to meet the precise requirements of the print head position for high-precision printing tasks; at the same time, when the print head body 3 is subjected to external collision or impact, the elastic buffer 4 can absorb the impact energy, reduce damage to the print head body 3, and drive the print head body 3 to quickly reset after the impact disappears, ensuring that the print head can continue to perform stable and precise printing operations. Based on the above solution, the print head can be finely adjusted in its position on the feed path, while improving the cooling and forming effect of the thermoplastic wire, thereby improving printing efficiency and quality, broadening the scope of application of the equipment, and better meeting the needs of refined printing.

[0048] In one embodiment, reference Figures 1 to 3The movable part 202 is provided with a first limiting part 2021 and a second limiting part 2022, and the first limiting part 2021 and the second limiting part 2022 are arranged at intervals along the first path; the print head body 3 has a mounting part 303, and the mounting part 303 is slidably fitted on the movable part 202 along the first path, and the mounting part 303 is located between the first limiting part 2021 and the second limiting part 2022.

[0049] Specifically, the first limiting portion 2021 and the second limiting portion 2022 can be structures such as bosses and flanges integrally formed on the movable portion 202 , or can be structural components externally connected to the movable portion 202 .

[0050] The mounting portion 303 can be designed to have a sliding structure compatible with the movable portion 202, such as a slider or a slide groove, to ensure smooth sliding of the mounting portion 303 along the first path. For example, if the movable portion 202 is configured as a rod-shaped structure, the mounting portion 303 can be configured as a boss structure with a through hole formed on the boss structure for the movable portion 202 to fit through. The through hole cooperates with the axial hole of the movable portion 202, allowing the mounting portion 303 to slide smoothly along the first path under the guidance of the movable portion 202, thereby achieving smooth movement of the printhead body 3 along the first path.

[0051] By setting the first limiting portion 2021 and the second limiting portion 2022, the forward movement and backward movement of the mounting portion 303 along the first path can be limited respectively, that is, the moving range of the mounting portion 303 is limited between the first limiting portion 2021 and the second limiting portion 2022. This can reduce the problem of excessive movement of the print head body 3 driven by the elastic buffer 4 due to the uncontrollability of the elastic buffer 4 during the deformation process, and can improve the position accuracy of the print head body 3 on the first path.

[0052] In one embodiment, reference Figures 1 to 3 The first limiting portion 2021 and the second limiting portion 2022 are arranged in sequence from back to front; the first end of the elastic buffer 4 is connected to the first limiting portion 2021, and the elastic buffer 4 is used to push the mounting portion 303 forward under the elastic force to abut against the second limiting portion 2022.

[0053] In this embodiment, the elastic buffer 4 is always in a pre-tightened state (i.e., in a compressed state), so as to ensure that the mounting portion 303 always maintains a fit state with the second limiting portion 2022; when the movable portion 202 moves along the first path, it can drive the mounting portion 303 to move synchronously along the first path with the same amplitude and speed, thereby avoiding the problem of position fluctuation relative to the movable portion 202 on the first path due to the mounting portion 303 being only connected to the flexible elastic buffer 4.

[0054] When the print head body 3 collides, the mounting portion 303 will move backward along the first path and further compress the elastic buffer 4. The elastic buffer 4 can absorb part of the impact energy through its compression deformation, thereby reducing the damage caused by the collision to the print head body 3; when the impact energy disappears, the elastic buffer 4 will return to its original state and drive the print head body 3 to move forward rapidly, so that the mounting portion 303 will re-abut against the second limit portion 2022 to complete the reset action.

[0055] Based on the above arrangement, while maintaining the energy absorption and buffering effect and the reset function of the elastic buffer member 4 , the position accuracy of the print head body 3 on the first path is further improved.

[0056] In one embodiment, reference Figures 1 to 3 The feeding assembly 301 includes a first roller 3011, a second roller 3012 and an extrusion drive device 3013. The first roller 3011 is connected to the extrusion drive device 3013. An extrusion channel is formed between the outer circumference of the first roller 3011 and the outer circumference of the second roller 3012. The extrusion channel is used to accommodate the thermoplastic wire; the extrusion drive device 3013 is used to drive the first roller 3011 to rotate, so as to push the thermoplastic wire in the extrusion channel to the heating device 302 and the printing area in sequence through the relative movement between the first roller 3011 and the second roller 3012.

[0057] Specifically, the first roller 3011 and the second roller 3012 are arranged side by side, and the rotation center axis of the first roller 3011 and the rotation center axis of the second roller 3012 are parallel to each other; the extrusion drive device 3013 may include a motor and a matching transmission mechanism, a reduction mechanism, etc.

[0058] The thermoplastic wire is clamped between the first roller 3011 and the second roller 3012 (i.e., in the extrusion channel between the outer circumference of the first roller 3011 and the outer circumference of the second roller 3012); when the extrusion drive device 3013 drives the first roller 3011 to rotate in a first clockwise direction, the thermoplastic wire will move forward under the friction of the first roller 3011, and the forward-moving thermoplastic wire will further drive the second roller 3012 to rotate in a second clockwise direction based on the friction, and the second clockwise direction is opposite to the first clockwise direction; in this way, under the joint action of the first roller 3011 as the driving wheel and the second roller 3012 as the driven wheel, the thermoplastic wire in the extrusion channel can be stably driven to continuously move forward, thereby realizing the extrusion operation of the thermoplastic wire, and thus the thermoplastic wire can be continuously transported to the printing area.

[0059] In one embodiment, reference Figures 1 to 3 , the first roller 3011 is configured as a gear structure; and / or, the second roller 3012 is configured as a gear structure.

[0060] In a specific implementation, only the first roller 3011 can be configured as a gear structure, only the second roller 3012 can be configured as a gear structure, or both the first roller 3011 and the second roller 3012 can be configured as gear structures. The toothed portion of the gear structure is used to directly contact the thermoplastic wire, thereby increasing the friction between the first roller 3011, the second roller 3012, and the thermoplastic wire, reducing the risk of the thermoplastic wire slipping on the outer circumference of the first roller 3011 and the outer circumference of the second roller 3012. As a result, the thermoplastic wire can be more stably conveyed to the printing area through the rotation of the first roller 3011 and the second roller 3012.

[0061] In one embodiment, reference Figures 1 to 3 The print head body 3 includes a heat sink 304, which is arranged toward the extrusion channel and is used to deliver cold air to the thermoplastic wire in the extrusion channel.

[0062] In actual applications, the heat generated by the heating device 302 may diffuse backward to the extrusion channel, causing the thermoplastic wire in the extrusion channel to be heated prematurely and melted. This prevents the prematurely melted thermoplastic wire from being smoothly extruded forward under the rotation of the first roller 3011 and the second roller 3012. To address this issue, this embodiment uses the heat dissipation device 304 to supply cooling air to the thermoplastic wire in the extrusion channel, thereby preventing the thermoplastic wire from being heated prematurely and melted before passing through the extrusion channel, thereby preventing smooth extrusion. The heat dissipation device 304 can be configured as a cooling fan to supply cooling air to the thermoplastic wire.

[0063] In one embodiment, reference Figures 1 to 3 The additive manufacturing device also includes a joint mechanism 6, which is connected to the print head body 3. The end of the joint mechanism 6 has at least the freedom of movement along the first axis relative to the print head body 3, and the end of the joint mechanism 6 has at least the freedom of rotation around the first axis and the freedom of rotation around the second axis relative to the print head body 3, and the second axis is perpendicular to the first axis; the cooling nozzle 5 is connected to the end of the joint mechanism 6.

[0064] Specifically, the joint structure can be set as a multi-link mechanism, and the links can be movably connected by hinges, sliders, pins and other connectors, so that the end of the joint mechanism 6 has multi-degree-of-freedom movement capabilities relative to the print head body 3. This design enables the cooling nozzle 5 connected to the end of the joint mechanism 6 to be flexibly adjusted in position in three-dimensional space. The operator can conveniently adjust the angle and position of the cooling nozzle 5 according to the shape and size of the printed part, ensuring that the cooling airflow sprayed by the cooling nozzle 5 can accurately act on the target position of the molten thermoplastic wire; for printed parts with complex geometric shapes, such as parts with suspended structures, curved surfaces or internal cavities, through the multi-degree-of-freedom adjustment of the joint mechanism 6, the cooling nozzle 5 can be made to supply air close to difficult-to-reach areas, thereby avoiding printing defects caused by insufficient cooling, thereby improving the dimensional accuracy and surface quality of the printed part, shortening the cooling time, and improving the overall printing efficiency.

[0065] In one embodiment, reference Figures 1 to 3 The joint mechanism 6 includes a first connecting rod 601, a second connecting rod 602 and a third connecting rod 603. The first end of the first connecting rod 601 is connected to the print head body 3, the first end of the second connecting rod 602 is slidably connected to the second end of the first connecting rod 601 along the first axis, and the first end of the second connecting rod 602 can rotate around the first axis relative to the second end of the first connecting rod 601, the first end of the third connecting rod 603 is rotatably connected to the second end of the second connecting rod 602 around the second axis, and the cooling nozzle 5 is connected to the second end of the third connecting rod 603.

[0066] Specifically, the first end of the first connecting rod 601 can be connected to the print head body 3 by direct connection or indirect connection, the first end of the second connecting rod 602 can be slidably connected to the second end of the first connecting rod 601 by pin hole matching, guide rail slider matching, boss and slide groove matching, etc., the first end of the second connecting rod 602 can be rotatably connected to the second end of the first connecting rod 601 by pin hole matching, hinge matching, bearing matching, etc., the first end of the third connecting rod 603 can be rotatably connected to the second end of the second connecting rod 602 by pin hole matching, hinge matching, bearing matching, etc., and the cooling nozzle 5 can be connected to the second end of the third connecting rod 603 by direct connection or indirect connection.

[0067] Based on the above arrangement, the cooling nozzle 5 can be conveniently adjusted in sliding along the first axis, in rotation around the first axis, and in rotation around the second axis, thereby enabling flexible adjustment of the air supply path.

[0068] In one embodiment, reference Figures 1 to 3 , the cooling nozzle 5 is detachably connected to the end of the joint mechanism 6.

[0069] In this embodiment, the cooling nozzle 5 is configured to be detachably connected, which can facilitate the use and maintenance of the cooling assembly. Specifically, the cooling nozzle 5 can be connected to the end of the joint mechanism 6 by a threaded connection. When it is necessary to switch to a different air supply mode for different printing materials or printing tasks, the operator can conveniently remove the original cooling nozzle 5 from the end of the joint mechanism 6 by screwing, and install a cooling nozzle 5 adapted to the current printing needs at the end of the joint mechanism 6; the replaced cooling nozzle 5 may differ in nozzle diameter, nozzle length, nozzle shape, etc. Based on the above settings, the flexibility of use can be improved, and it can better adapt to diverse printing needs, thereby improving the work efficiency and applicability of additive manufacturing equipment. In addition, the above-mentioned detachable connection form also facilitates the operator to clean, repair, replace, and other operations on the cooling nozzle 5.

[0070] Preferably, the cooling nozzle 5 is provided with a main air supply port and several auxiliary air supply ports, and the several auxiliary air supply ports are arranged around the main air supply port. The main air supply port is mainly used to directly cool the extruded molten thermoplastic wire, so that it can be quickly solidified and initially formed to ensure the basic shape of the printed part. In the actual printing process, in addition to the molten thermoplastic wire that is directly extruded, the surrounding area of ​​the molten thermoplastic wire may still be in a high temperature state, which may cause the edge position of some thermoplastic wires to be difficult to completely solidify under the action of this high temperature; based on this problem, while the main air supply port is used for the main cooling operation, air can be supplied to this part of the high-temperature area through the auxiliary air supply port, so that this part of the high-temperature area can also be effectively cooled, which can avoid the deformation, collapse and other problems of the initially formed thermoplastic wire due to excessively high ambient temperature, thereby improving the stability of solidification molding and the overall quality of the printed part.

[0071] In addition, the auxiliary air supply port can also create turbulence on the airflow delivered by the main air supply port. The formation of turbulence can increase the complexity and diversity of the airflow, so that the output airflow acts on the surface of the printed part in a more diverse form. This diversified airflow pattern can adapt to more different cooling requirements during the printing process and improve the uniformity of the airflow, thereby obtaining better molding effects.

[0072] In one embodiment, reference Figures 1 to 3The joint mechanism 6 also includes a clamping seat 604 and a first locking member 605. The clamping seat 604 is connected to the print head body 3. The clamping seat 604 has a first clamping arm 6041 and a second clamping arm 6042. The first end of the first connecting rod 601 is movably connected between the first clamping arm 6041 and the second clamping arm 6042 along the first axis; the first locking member 605 is threadedly connected to the first clamping arm 6041 and the second clamping arm 6042. The first locking member 605 is used to drive the first clamping arm 6041 and the second clamping arm 6042 to approach each other through a threaded screwing operation to clamp and fix the first end of the first connecting rod 601.

[0073] Specifically, the clamping seat 604 can be threadedly connected to the print head body 3, and a groove for accommodating the first connecting rod 601 can be respectively provided on the side of the first clamping arm 6041 facing the second clamping arm 6042 and the side of the second clamping arm 6042 facing the first clamping arm 6041. The groove passes through the first clamping arm 6041 and the second clamping arm 6042 along the first axis, so as to ensure that the first connecting rod 601 accommodated in the groove can move along the first axis relative to the clamping seat 604; when the first connecting rod 601 is adjusted into position relative to the clamping seat 604 on the first axis, the operator can pull the first clamping arm 6041 and the second clamping arm 6042 closer to each other by screwing the first locking piece 605, so as to use the first clamping arm 6041 and the second clamping arm 6042 to clamp the first connecting rod 601, so that the relative position of the first connecting rod 601 and the clamping seat 604 remains fixed, thereby avoiding the subsequent relative movement of the two and destroying the accuracy of the air supply cooling operation.

[0074] Based on the above arrangement, the freedom of movement of the joint mechanism 6 can be increased, thereby further improving the flexibility of position adjustment of the cooling nozzle 5 .

[0075] Optionally, the print head body 3 is provided with a plurality of installation positions arranged at intervals. In actual application, the clamping seat 604 can be connected to the corresponding installation position as needed to further improve the flexibility of position adjustment of the cooling nozzle 5.

[0076] In one embodiment, reference Figures 1 to 3 The first end of the second connecting rod 602 is provided with a first adjustment hole (not shown in the figure), the first adjustment hole extends along the first axis, and the second end of the first connecting rod 601 is inserted into the first adjustment hole; the joint mechanism 6 also includes a second locking piece (not shown in the figure), the second locking piece is threadedly connected to the first end of the second connecting rod 602, and the second locking piece is used to abut against the second end of the first connecting rod 601 through a threaded engagement operation to press the first connecting rod 601 onto the second connecting rod 602.

[0077] Specifically, through the limiting action between the first adjustment hole and the first connecting rod 601, the second connecting rod 602 can slide along the first axis relative to the first connecting rod 601 while the second connecting rod 602 can also rotate around the first axis relative to the first connecting rod 601; when the second connecting rod 602 is adjusted into position relative to the first connecting rod 601, the operator can screw the second locking piece on the second connecting rod 602 to make the second locking piece abut against the first connecting rod 601, so as to conveniently achieve relative fixation between the first connecting rod 601 and the second connecting rod 602, thereby avoiding subsequent relative movement or relative rotation between the two, which may destroy the accuracy of the air supply cooling operation.

[0078] In one embodiment, reference Figures 1 to 3 The first end of the third connecting rod 603 is provided with a second adjustment hole (not shown in the figure), the second adjustment hole extends along the second axis, and the second end of the second connecting rod 602 is inserted into the second adjustment hole; the joint mechanism 6 also includes a third locking member (not shown in the figure), the third locking member is threadedly connected to the first end of the third connecting rod 603, and the third locking member is used to abut against the second end of the second connecting rod 602 through a threaded engagement operation to press the second connecting rod 602 onto the third connecting rod 603.

[0079] Specifically, through the limiting action between the second adjustment hole and the second connecting rod 602, the third connecting rod 603 can rotate around the second axis relative to the second connecting rod 602; when the third connecting rod 603 is adjusted into position relative to the second connecting rod 602, the operator can screw the third locking piece on the third connecting rod 603 to make the third locking piece abut against the second connecting rod 602, so as to conveniently achieve relative fixation between the second connecting rod 602 and the third connecting rod 603, thereby avoiding the subsequent relative rotation between the two and destroying the accuracy of the air supply cooling operation.

[0080] In one embodiment, reference Figures 1 to 3 The joint mechanism 6 also includes a fourth connecting rod 606, the first end of the fourth connecting rod 606 is rotatably connected to the second end of the third connecting rod 603 around a third axis, the third axis is parallel to the second axis, and the third axis is spaced apart from the second axis; the cooling nozzle 5 is connected to the second end of the fourth connecting rod 606.

[0081] Specifically, the first end of the fourth connecting rod 606 can be rotatably connected to the second end of the third connecting rod 603 about the third axis by means of a pin-hole fit, a hinge fit, a bearing fit, etc. By providing the fourth connecting rod 606, the freedom of movement of the joint mechanism 6 can be further increased, thereby further improving the flexibility of position adjustment of the cooling nozzle 5.

[0082] In one embodiment, reference Figures 1 to 3The second end of the third connecting rod 603 is provided with a third adjustment hole (not shown in the figure), the third adjustment hole extends along the third axis, and the first end of the fourth connecting rod 606 is inserted into the third adjustment hole; the joint mechanism 6 also includes a fourth locking member (not shown in the figure), which is threadedly connected to the second end of the third connecting rod 603, and the fourth locking member is used to abut against the first end of the fourth connecting rod 606 through a threaded engagement operation to press the fourth connecting rod 606 onto the third connecting rod 603.

[0083] Specifically, through the limiting action between the third adjustment hole and the fourth connecting rod 606, the fourth connecting rod 606 can rotate around the third axis relative to the third connecting rod 603; when the fourth connecting rod 606 is adjusted into position relative to the third connecting rod 603, the operator can screw the fourth locking piece on the third connecting rod 603 to make the fourth locking piece abut against the fourth connecting rod 606, so as to conveniently achieve relative fixation between the third connecting rod 603 and the fourth connecting rod 606, thereby avoiding the subsequent relative rotation between the two and destroying the accuracy of the air supply cooling operation.

[0084] In one embodiment, reference Figures 1 to 3 The joint mechanism 6 also includes a fifth connecting rod 607, the first end of the fifth connecting rod 607 is slidably connected to the second end of the fourth connecting rod 606 along the fourth axis, the fourth axis is perpendicular to the third axis, and the cooling nozzle 5 is connected to the second end of the fifth connecting rod 607.

[0085] Specifically, the first end of the fifth connecting rod 607 can be slidably connected to the second end of the fourth connecting rod 606 along the fourth axis by means of a pin-hole fit, a guide rail slider fit, a boss-slot fit, etc. The provision of the fifth connecting rod 607 further increases the degree of freedom of movement of the joint mechanism 6, thereby further enhancing the flexibility of position adjustment of the cooling nozzle 5.

[0086] In one embodiment, reference Figures 1 to 3 The second end of the fourth connecting rod 606 is provided with a fourth adjustment hole (not shown in the figure), the fourth adjustment hole extends along the fourth axis, and the first end of the fifth connecting rod 607 is passed through and fitted into the fourth adjustment hole; the joint mechanism 6 also includes a fifth locking member (not shown in the figure), the fifth locking member is threadedly connected to the second end of the fourth connecting rod 606, and the fifth locking member is used to abut against the first end of the fifth connecting rod 607 through a threaded engagement operation to press the fifth connecting rod 607 onto the fourth connecting rod 606.

[0087] Specifically, through the limiting action between the fourth adjustment hole and the fifth connecting rod 607, the fifth connecting rod 607 can slide along the fourth axis relative to the fourth connecting rod 606; when the fifth connecting rod 607 is adjusted into position relative to the fourth connecting rod 606, the operator can screw the fifth locking piece on the fourth connecting rod 606 to make the fifth locking piece abut against the fifth connecting rod 607, so as to conveniently achieve relative fixation between the fourth connecting rod 606 and the fifth connecting rod 607, thereby avoiding the subsequent relative rotation between the two and destroying the accuracy of the air supply cooling operation.

[0088] In one embodiment, reference Figures 1 to 3 The base 1 includes a first base body 101, a second base body 102 and a first fastener (not shown in the figure). The second base body 102 is swingably connected to the first base body 101 around a first adjustment axis. The first fastener is used to lock the second base body 102 on the second base body 102. The fixing part 201 is connected to the second base body 102; the first adjustment axis is perpendicular to the first vertical plane, and the first vertical plane intersects with the first path.

[0089] like Figure 1 and Figure 2 As shown, one of the first base body 101 and the second base body 102 can be provided with an arc-shaped slide groove with the first adjustment axis as the central axis, and the other one of the first base body 101 and the second base body 102 can be provided with a slider structure adapted to the arc-shaped slide groove. Through the sliding fit of the slider structure in the arc-shaped slide groove, the second base body 102 can be swung relative to the first base body 101 around the first adjustment axis, so that the angle of the print head body 3 on the second base body 102 relative to the first base body 101 can be conveniently adjusted.

[0090] Taking the example of a threaded fastener as the first fastener, the screw portion of the first fastener can be pre-passed through the above-mentioned arc-shaped slide groove and screwed onto the above-mentioned slider structure; when the angle of the print head body 3 relative to the first base body 101 is adjusted to the right position, the operator can screw the first fastener to push the first base body 101 and the second base body 102 to be pressed against each other through the screw head portion of the first fastener, thereby conveniently achieving relative fixation between the first base body 101 and the second base body 102, and avoiding subsequent positional displacement of the print head body 3 relative to the first base body 101.

[0091] Based on the above arrangement, the freedom of movement of the print head body 3 relative to the base 1 can be increased, so that the print head body 3 can be more flexibly adjusted to a suitable angle and position according to actual printing requirements.

[0092] In one embodiment, reference Figures 1 to 3The additive manufacturing device also includes a guide box 7, which is connected to the rear side of the print head body 3. A wiring channel 701 is provided in the guide box 7. The outlet end of the wiring channel 701 is arranged toward the wire inlet end of the print head body 3. The wiring channel 701 is used to accommodate thermoplastic wire.

[0093] By providing the guide box 7, the wiring channel 701 can be used to organize and guide the thermoplastic wires to a certain extent, allowing the thermoplastic wires to enter the wire entry end of the print head body 3 (i.e., the extrusion channel between the first roller 3011 and the second roller 3012 in the above embodiment) at a more appropriate angle. This allows the thermoplastic wires to be subsequently conveyed more smoothly to the printing area through the print head body 3. Furthermore, the guide box 7 provides a certain degree of enclosure and protection for the thermoplastic wires before entering the print head body 3, preventing them from being excessively exposed and potentially damaged.

[0094] In one embodiment, reference Figures 1 to 3 The telescopic adjustment mechanism 2 is configured as a micrometer screw, the fixed sleeve of the micrometer screw constitutes the fixed portion 201 , and the micrometer screw of the micrometer screw constitutes the movable portion 202 .

[0095] The micrometer screw is a micrometer with high adjustment accuracy. When it is necessary to fine-tune the position of the print head body 3 on the first path, the high-precision adjustment capability of the micrometer screw can meet the strict position requirements in high-precision printing tasks, ensuring that the print head body 3 can be accurately moved to the desired position, thereby improving printing quality.

[0096] In addition, the micrometer screw is usually equipped with a coarse adjustment knob and a fine adjustment knob. During actual operation, the operator can first use the coarse adjustment knob to quickly bring the print head body 3 close to the target position, and then switch to the fine adjustment knob to make fine adjustments to achieve precise positioning of the print head body 3. This combination of coarse and fine adjustment allows the operator to efficiently and conveniently adjust the position of the print head body 3 while ensuring accurate adjustment.

[0097] In addition, the scale lines on the micrometer screw provide an intuitive adjustment reference for the operator. During the adjustment process, the operator can refer to the scale lines to accurately determine the movement amount of the print head body 3, thereby achieving precise adjustment control.

[0098] In one embodiment, reference Figures 1 to 3 The additive manufacturing equipment also includes a robotic arm (not shown in the figure), and the base 1 is detachably connected to the robotic arm.

[0099] In this embodiment, the high-precision motion control capability of the robotic arm can effectively reduce the effects of vibration and inertia during the printing process, improve the movement accuracy of the print head body 3, and thus improve the printing quality; at the same time, the stable support function of the robotic arm can ensure the stability of the equipment during the printing process and reduce the printing deviation caused by the shaking of the equipment. Through the multi-degree-of-freedom movement of the robotic arm, the additive manufacturing equipment can achieve a wider range of printing operations, breaking through the limitations of the traditional fixed base 1 on the printing range, making the additive manufacturing equipment more flexible and adaptable, and can be used to manufacture larger sizes and more complex parts. In addition, based on the detachable connection between the base 1 and the robotic arm, it is easier to maintain, replace and transport the equipment, which improves the versatility and portability of the equipment; specifically, the base 1 can be connected to the end of the robotic arm by a threaded connection.

[0100] In one embodiment, reference Figure 1 and Figure 4 The additive manufacturing equipment also includes an adjustment module 9, which is electrically connected to the heating device 302 and the air compression device 8; the adjustment module 9 pre-stores first mapping relationship data between heating parameters and air supply parameters, and the adjustment module 9 is used to obtain the current heating parameters of the heating device 302, and the adjustment module 9 is used to send the target air supply parameters corresponding to the current heating parameters in the first mapping relationship data to the air compression device 8, and the air compression device 8 is used to perform air supply operations according to the target air supply parameters.

[0101] The adjustment module 9 can adopt a controller chip with basic functions such as data storage, call, simple calculation, input and output; the adjustment module 9 can obtain the current heating parameters of the heating device 302 (including heating temperature, heating rate, heating time, etc.) in real time, and quickly and accurately call the corresponding target air supply parameters (including air output power, air supply time, etc.) according to the pre-stored first mapping relationship data, and send the corresponding target air supply parameters to the air compression device 8, so that the air compression device 8 can perform air supply operations according to the parameters that are most suitable for the current heating conditions.

[0102] The automated parameter adjustment mechanism provided in this embodiment not only improves the accuracy of the cooling process but also reduces manual intervention, lowering operational difficulty and error rates, thereby enhancing the intelligence of the device. This approach ensures that the additive manufacturing cooling assembly consistently operates at optimal cooling conditions, effectively improving the quality of printed parts and meeting the demands of high-precision additive manufacturing.

[0103] In one embodiment, reference Figure 1 and Figure 4The additive manufacturing equipment also includes a contour sensing device 10, which is arranged on the print head body 3 and is electrically connected to the adjustment module 9. The contour sensing device 10 is used to obtain the current contour data of the formed workpiece in the printing area and send it to the adjustment module 9; the adjustment module 9 pre-stores second mapping relationship data between the contour data and the heating parameters, and the adjustment module 9 is used to send the target heating parameters corresponding to the current contour data in the second mapping relationship data to the heating device 302, and the heating device 302 is used to perform heating operations according to the target heating parameters.

[0104] In this embodiment, the current contour data acquired by the contour sensing device 10 includes any data that can be used to characterize the machining accuracy of the formed workpiece, which is not limited here. Taking the contour sensing device 10 as an example, the contour sensing device 10 can send the acquired contour image of the formed workpiece as the current contour data to the adjustment module 9. The adjustment module 9 can analyze and compare the contour image with the pre-stored target contour image based on existing image analysis technology, and determine whether the contour image meets the preset threshold condition based on the comparison result. If the threshold condition is not met, it can be determined that there is a large deviation between the current contour image and the target contour image, that is, the external dimensions of the currently printed workpiece have a large deviation from the ideal shape, which can indicate that the heating effect of the current thermoplastic wire does not meet the current printing requirements. At this time, the adjustment module 9 will automatically retrieve the target heating parameters that are compatible with the currently acquired contour image (i.e., compatible with the current contour data) and can meet the current printing requirements from the second mapping relationship data based on the above judgment result, and send them to the heating device 302, so that the heating device 302 performs a heating operation on the thermoplastic wire according to the adjusted heating parameters, so as to timely compensate for the defects caused by improper heating parameter settings in the previous printing process and better meet the printing requirements in the subsequent printing process.

[0105] For example, when the adjustment module 9 determines that the current contour image acquired by the contour sensing device 10 has a large size deviation relative to the target contour image at a certain position, it can be determined that a collapse problem has occurred at that position, and thus it can be determined that the problem is caused by the heating temperature being too high, which has caused part of the thermoplastic wire to fail to completely escape from the molten state; based on the above judgment result, the adjustment module 9 can correspondingly retrieve the target heating parameter with a lower heating temperature in the second mapping relationship data and send it to the heating device 302, so that the heating device 302 performs a heating operation on the thermoplastic wire according to the adjusted heating parameter, thereby avoiding the subsequent recurrence of the local collapse problem caused by the previous excessive heating temperature.

[0106] The above examples are merely illustrative of the technical solution. In actual applications, the second mapping relationship between profile data and heating parameters can be flexibly configured based on printing requirements, and this is not a limitation here. Based on the above solution, autonomous, real-time adjustment of heating parameters based on printing feedback can be achieved. Abnormalities caused by improper heating during printing can be promptly addressed without manual intervention, thereby improving print quality to a certain extent and enhancing the automation and intelligence of the device.

[0107] In one embodiment, reference Figure 1 and Figure 4 The adjustment module 9 is electrically connected to the feeding component 301. The adjustment module 9 pre-stores third mapping relationship data between the heating parameters and the feeding parameters. The adjustment module 9 is used to send the target feeding parameter corresponding to the current heating parameter in the third mapping relationship data to the feeding component 301. The feeding component 301 is used to sequentially convey the thermoplastic wire to the heating device 302 and the printing area according to the target feeding parameter.

[0108] In this embodiment, after the heating parameters of the heating device 302 are adjusted based on the method of the previous embodiment, the adjustment module 9 can quickly and accurately retrieve the corresponding target feeding parameters (including the feeding speed, etc., more specifically, the rotation speed and acceleration of the first roller 3011 and the second roller 3012) from the third mapping relationship data based on the current heating parameters, and send the corresponding target feeding parameters to the feeding component 301, so that the feeding component 301 can perform the feeding operation according to the parameters that best suit the current heating conditions. For example, when the current heating temperature is lowered, a lower feeding speed can be selected to prevent the thermoplastic wire from being insufficiently heated and not fully melted; similarly, when the current heating temperature is increased, a higher feeding speed can be selected to prevent the thermoplastic wire from staying in the heating area for too long, resulting in excessive melting.

[0109] In one embodiment, reference Figure 1 and Figure 4 The adjustment module 9 is electrically connected to the heat sink 304. The adjustment module 9 pre-stores fourth mapping relationship data between the heating parameter and the heat sink parameter. The adjustment module 9 is used to send the target heat sink parameter corresponding to the current heating parameter in the fourth mapping relationship data to the heat sink 304. The heat sink 304 is used to deliver cooling to the thermoplastic wire in the extrusion channel according to the target heat sink parameter.

[0110] In this embodiment, after the heating parameters of the heating device 302 are adjusted based on the method of the above embodiment, the adjustment module 9 can quickly and accurately retrieve the corresponding target heat dissipation parameters (including air output power, fan speed, etc.) from the fourth mapping relationship data according to the current heating parameters, and send the corresponding target heat dissipation parameters to the heat dissipation device 304, so that the heat dissipation device 304 can perform heat dissipation operations according to the parameters that best suit the current heating conditions. For example, when the current heating temperature is increased, the heating device 302 can generate more heat. At this time, a higher fan speed can be selected to deliver more cold air to the thermoplastic wire in the extrusion channel within the same time, so as to better prevent the thermoplastic wire from being heated and melted prematurely at the higher heating temperature.

[0111] Based on the overall technical solution constituted by the above-mentioned embodiments, the adjustment module 9 is electrically connected to the contour sensing device 10, the heating device 302, the air compression device 8, the feeding assembly 301, and the heat dissipation device 304 at the same time, so that the adjustment module 9 can be used to realize autonomous linkage control among the contour data, heating parameters, air supply parameters, feeding parameters, and heat dissipation parameters, forming a complete control chain. When one of the parameters changes, the other parameters can be automatically set to a matching state, thereby ensuring the accurate operation of the entire printing process without human intervention, further improving the automation and intelligence level of the additive manufacturing equipment.

[0112] It should be noted that other contents of the additive manufacturing equipment disclosed in the present invention can be found in the prior art and will not be repeated here.

[0113] The above description is merely an exemplary embodiment of the present invention and does not limit the patent scope of the present invention. Any equivalent structural transformation made by utilizing the contents of the present invention's description and drawings under the technical concept of the present invention, or directly / indirectly applied in other related technical fields, is included in the patent protection scope of the present invention.

Claims

1. An additive manufacturing device, characterized in that: The additive manufacturing equipment includes: base; a telescopic adjustment mechanism, the telescopic adjustment mechanism comprising a fixed portion and a movable portion, the fixed portion being connected to the base, and the movable portion being adjustably slidably engaged with the fixed portion along a first path; a print head body, the print head body being slidably engaged with the movable portion along the first path; the print head body comprising a feeding assembly and a heating device, the feeding assembly being used to sequentially convey the thermoplastic wire to the heating device and the printing area, the heating device being used to heat the thermoplastic wire into a molten state; an elastic buffer member, wherein a first end of the elastic buffer member is connected to the movable portion, and a second end of the elastic buffer member is connected to the print head body; the elastic buffer member is used to prevent the print head body from moving backward along the first path under elastic force; A cooling nozzle connected to the print head body; An air compression device is connected to the cooling nozzle; the air compression device is used to supply air to the printing area through the cooling nozzle to cool and shape the molten thermoplastic wire.

2. The additive manufacturing device according to claim 1, wherein: The movable portion is provided with a first limiting portion and a second limiting portion, the first limiting portion and the second limiting portion being spaced apart along the first path; the print head body is provided with a mounting portion, the mounting portion being slidably fitted on the movable portion along the first path, and the mounting portion being located between the first limiting portion and the second limiting portion; And / or, the feeding assembly includes a first roller, a second roller and an extrusion drive device, the first roller is connected to the extrusion drive device, an extrusion channel is formed between the outer circumference of the first roller and the outer circumference of the second roller, and the extrusion channel is used to accommodate the thermoplastic wire; The extrusion drive device is used to drive the first roller to rotate, so as to push the thermoplastic wire in the extrusion channel to the heating device and the printing area in sequence through the relative movement between the first roller and the second roller.

3. The additive manufacturing device according to claim 2, wherein: The first limiting portion and the second limiting portion are arranged in sequence from back to front; the first end of the elastic buffer is connected to the first limiting portion, and the elastic buffer is used to push the mounting portion forward under elastic force to abut against the second limiting portion; And / or, the first roller is configured as a gear structure; And / or, the second roller is configured as a gear structure; And / or, the print head body includes a heat dissipation device, which is arranged toward the extrusion channel and is used to transmit cold air to the thermoplastic wire in the extrusion channel.

4. The additive manufacturing device according to claim 1, wherein: The additive manufacturing device also includes a joint mechanism, which is connected to the print head body. The end of the joint mechanism has at least movement freedom along a first axis relative to the print head body, and the end of the joint mechanism has at least rotation freedom around the first axis and rotation freedom around a second axis relative to the print head body, and the second axis is perpendicular to the first axis; the cooling nozzle is connected to the end of the joint mechanism.

5. The additive manufacturing device according to claim 4, characterized in that The joint mechanism includes a first connecting rod, a second connecting rod, and a third connecting rod, wherein a first end of the first connecting rod is connected to the print head body, a first end of the second connecting rod is slidably connected to the second end of the first connecting rod along the first axis, and the first end of the second connecting rod is rotatable relative to the second end of the first connecting rod around the first axis, a first end of the third connecting rod is rotatably connected to the second end of the second connecting rod around the second axis, and the cooling nozzle is connected to the second end of the third connecting rod; And / or, the cooling nozzle is detachably connected to the end of the joint mechanism.

6. The additive manufacturing device according to claim 5, characterized in that The joint mechanism further includes a clamping base and a first locking member, wherein the clamping base is connected to the print head body, the clamping base has a first clamping arm and a second clamping arm, and the first end of the first connecting rod is movably connected between the first clamping arm and the second clamping arm along the first axis; the first locking member is threadedly connected to the first clamping arm and the second clamping arm, and the first locking member is used to drive the first clamping arm and the second clamping arm to move closer to each other through a screwing operation to clamp and fix the first end of the first connecting rod; And / or, a first adjustment hole is provided at the first end of the second connecting rod, the first adjustment hole extends along the first axis, and the second end of the first connecting rod is inserted into and fitted into the first adjustment hole; the joint mechanism further includes a second locking piece, the second locking piece is threadedly connected to the first end of the second connecting rod, and the second locking piece is used to abut against the second end of the first connecting rod through a threaded engagement operation to press-fit the first connecting rod to the second connecting rod; And / or, the first end of the third connecting rod is provided with a second adjustment hole, the second adjustment hole extends along the second axis, and the second end of the second connecting rod is inserted into and fitted into the second adjustment hole; the joint mechanism further includes a third locking piece, the third locking piece being threadedly connected to the first end of the third connecting rod, the third locking piece being configured to abut against the second end of the second connecting rod through a threaded engagement operation, so as to press-fit the second connecting rod onto the third connecting rod; And / or, the joint mechanism also includes a fourth connecting rod, the first end of the fourth connecting rod is rotatably connected to the second end of the third connecting rod around a third axis, the third axis is parallel to the second axis, and the third axis is spaced apart from the second axis; the cooling nozzle is connected to the second end of the fourth connecting rod.

7. The additive manufacturing device according to claim 6, characterized in that The second end of the third connecting rod is provided with a third adjustment hole, the third adjustment hole extending along the third axis, and the first end of the fourth connecting rod is inserted into and fitted into the third adjustment hole; the joint mechanism further includes a fourth locking piece, the fourth locking piece being threadedly connected to the second end of the third connecting rod, the fourth locking piece being configured to abut against the first end of the fourth connecting rod through a threaded engagement operation, so as to press-fit the fourth connecting rod onto the third connecting rod; And / or, the joint mechanism also includes a fifth connecting rod, the first end of the fifth connecting rod is slidably connected to the second end of the fourth connecting rod along a fourth axis, the fourth axis is perpendicular to the third axis, and the cooling nozzle is connected to the second end of the fifth connecting rod.

8. The additive manufacturing device according to claim 1, wherein: The base includes a first base, a second base, and a first fastener. The second base is swingably connected to the first base about a first adjustment axis. The first fastener is used to lock the second base to the second base. The fixing portion is connected to the second base. The first adjustment axis is perpendicular to a first vertical plane, and the first vertical plane intersects the first path. And / or, the additive manufacturing device further comprises a guide box, the guide box being connected to the rear side of the print head body, a wiring channel being provided in the guide box, an outlet end of the wiring channel being arranged toward a wire inlet end of the print head body, the wiring channel being used to accommodate the thermoplastic wire; And / or, the telescopic adjustment mechanism is configured as a micrometer screw, the fixed sleeve of the micrometer screw constitutes the fixed portion, and the micrometer screw of the micrometer screw constitutes the movable portion; And / or, the additive manufacturing equipment further includes a robotic arm, and the base is detachably connected to the robotic arm.

9. The additive manufacturing device according to claim 1, wherein: The additive manufacturing equipment also includes an adjustment module, which is electrically connected to the heating device and the air compression device; the adjustment module pre-stores first mapping relationship data between heating parameters and air supply parameters, and the adjustment module is used to obtain the current heating parameters of the heating device, and the adjustment module is used to send the target air supply parameters corresponding to the current heating parameters in the first mapping relationship data to the air compression device, and the air compression device is used to perform air supply operations according to the target air supply parameters.

10. The additive manufacturing device according to claim 9, wherein: The additive manufacturing apparatus further includes a contour sensing device, the contour sensing device being disposed on the print head body and electrically connected to the adjustment module, the contour sensing device being configured to obtain current contour data of the formed workpiece in the printing area and transmit the data to the adjustment module; the adjustment module pre-stores second mapping relationship data between the contour data and the heating parameters, the adjustment module being configured to transmit target heating parameters corresponding to the current contour data in the second mapping relationship data to the heating device, and the heating device being configured to perform a heating operation according to the target heating parameters; And / or, the adjustment module is electrically connected to the feeding component, and the adjustment module pre-stores third mapping relationship data between the heating parameters and the feeding parameters. The adjustment module is used to send the target feeding parameters corresponding to the current heating parameters in the third mapping relationship data to the feeding component, and the feeding component is used to convey the thermoplastic wire to the heating device and the printing area in sequence according to the target feeding parameters.

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