3D printing equipment based on corrugated pipe-like workpiece production

Abstract

The invention discloses 3D printing equipment based on corrugated-pipe-like workpiece production, relates to the technical field of 3D printing equipment, and solves the technical problems of low precision, poor efficiency and difficult maintenance in corrugated-pipe-like workpiece production. The 3D printing equipment comprises a base, a machine shell is fixedly connected to the top end of the base, and a fixing frame is fixedly connected to the interior of the front surface of the machine shell; a retaining door is rotatably connected to the left side of the interior of the fixing frame through a pin shaft, a supporting frame is fixedly connected to the bottom of the left side of the machine shell, a plurality of silk rollers are rotatably connected to the inner side of the supporting frame at equal intervals, and a printing mechanism is arranged in the machine shell. Through cooperative work of the mechanisms, the supporting component accurately calibrates the levelness of the supporting plate through three sets of adjusting assemblies, the supporting component is matched with buffering supporting to prevent vibration, the printing precision is guaranteed, the multiple wire rollers and the machine heads are matched with multiple materials, the different requirements of workpieces are met, the automatic head changing system achieves rapid switching of the machine heads, and the clamping groove plate temporarily stores the idle machine heads. And the printing efficiency and the equipment applicability are greatly improved.

Description

Technical Field

[0001] This invention relates to the field of 3D printing equipment technology, and more specifically to 3D printing equipment for producing corrugated tubular workpieces. Background Technology

[0002] With the widespread application of 3D printing technology in precision manufacturing, corrugated tubular workpieces are increasingly used in high-end equipment fields such as aerospace, petrochemicals, and medical devices due to their excellent flexibility, fatigue resistance, and sealing performance. The structural characteristics of these workpieces are characterized by a periodic corrugated shape, requiring high toughness in some areas to accommodate deformation, while interfaces or support areas rely on rigidity to ensure connection stability. Therefore, this places stringent demands on the multi-material compatibility, printing accuracy, and processing efficiency of 3D printing equipment.

[0003] Current 3D printing equipment used for producing corrugated tubular workpieces lacks basic protection and stability. Furthermore, the corrugated structure of the workpiece demands extremely high horizontality of the printing plane; if the hot plate is tilted, it can easily lead to uneven workpiece wall thickness and distorted corrugation. Existing equipment often uses fixed supports or simple bolt adjustments, relying on operator experience and lacking a quantifiable horizontal positioning benchmark, making precise calibration difficult. Traditional equipment often features a single-filament roller and single-head design. To process composite workpieces with "high-toughness tubular bodies + hard interfaces," the printing process must be interrupted to manually replace the filament and head. This is not only cumbersome but also prone to filament residue and head positioning deviations, leading to defects such as workpiece delamination and interface breakage. Moreover, replacing the head is inconvenient.

[0004] In response to the shortcomings of the existing technologies, there is an urgent need to develop a 3D printing device with good basic protection, precise and controllable printing reference, strong adaptability to multiple materials, and efficient and convenient head replacement, so as to solve the problems of low precision, poor efficiency and difficult maintenance in the production of corrugated tubular workpieces, and promote the large-scale and high-quality production of such workpieces. Summary of the Invention

[0005] The objective of this invention can be achieved through the following technical solution: a 3D printing device for producing corrugated tubular workpieces, including a base, a housing fixed to the top of the base, a fixed frame fixed to the inside of the front surface of the housing, a stop door rotatably connected to the left side of the inside of the fixed frame via a pin, a support frame fixed to the bottom left side of the housing, a plurality of filament rollers rotatably connected to the inner side of the support frame at equal intervals, and a printing mechanism provided inside the housing.

[0006] The printing mechanism includes a base plate, a gantry frame is fixedly connected to the top of the base plate, a support member is provided at the bottom inner side of the gantry frame, a fixing member is provided at the top inner side of the gantry frame, a snap-fit ​​member is provided on the left side of the gantry frame, and the base plate is fixedly connected to the bottom inner side of the machine housing.

[0007] As a further embodiment of the present invention, the supporting component includes a support base, a plurality of spring struts are fixedly connected at equal intervals to the top outer side of the support base, a support plate is fixedly connected to the top of the plurality of spring struts, a ball-head strut is rotatably connected to the bottom left rear end of the support plate, and an adjustment assembly consisting of a sleeve, a threaded ring, a ball-head threaded rod, a lever, a chuck, an adapter and a support rod is provided at the bottom left front end and the front and rear right ends of the bottom of the support plate. The back of the support base is threadedly connected to the bottom end of the outer wall of the lead screw responsible for vertical movement in the gantry frame through a threaded block.

[0008] As a further embodiment of the present invention, the adjusting assembly includes a sleeve, a threaded ring rotatably connected to the top end of the sleeve, a ball-head threaded rod threadedly connected to the inside of the threaded ring, a lever disposed on the left side of the threaded ring, a chuck fixedly connected to the right side of the lever, an adapter rotatably connected to the bottom of the chuck, a support rod disposed on the bottom left side of the outer wall of the lever, the sleeve fixedly connected to the top end of the support base, the outer wall of the ball-head threaded rod threadedly connected to the inner wall of the threaded ring, and the bottom end of the outer wall of the ball-head threaded rod inserted into the inside of the sleeve, the chuck disposed inside the top end of the threaded ring, the adapter rotatably connected to the bottom end inside the top end of the threaded ring, the bottom of the support rod fixedly connected to the top end of the support base, and the left side of the lever capable of engaging the top end of the support rod.

[0009] As a further embodiment of the present invention, the plurality of adjustment components are symmetrical about the central axis of the support plate.

[0010] As a further aspect of the present invention, the top left side of the housing is provided with multiple filament inlets at equal intervals, and the filaments wrapped around the outer wall of the filament roller can enter the interior of the housing through the filament inlets.

[0011] As a further embodiment of the present invention, the fixing component includes a limiting slider, a threaded tube is fixedly connected inside the limiting slider, an electric telescopic rod is fixedly connected to the bottom of the limiting slider, a fixing plate is fixedly connected to the bottom of the electric telescopic rod, and the threaded tube is threadedly connected to the outer wall of the lead screw responsible for longitudinal movement in the gantry frame.

[0012] As a further embodiment of the present invention, the fixing component further includes a housing. An electric telescopic rod two is fixedly connected to the right side of the housing's interior. A first connecting rod is fixedly connected to the left side of the electric telescopic rod two. Support heads one are fixedly connected to the center of the front and rear ends of the outer wall of the housing. Second connecting rods are rotatably connected to the inner sides of the front and rear ends of the first connecting rods. Connecting heads are rotatably connected to the outer sides of the two second connecting rods, and the right side of the connecting head is rotatably connected to the left side of the support head one via a pin. Third connecting rods are rotatably connected to the left sides of the two connecting heads via pins. Support heads two are fixedly connected to the center of the left side of the front and rear ends of the outer wall of the housing. A clamp is rotatably connected to the left side of the support head two via a pin, and the right side of the clamp is also rotatably connected to the left side of the third connecting rod via a pin. A magnetic connector is installed at the center of the left side of the housing. The housing is fixedly attached to the bottom of the fixing plate.

[0013] As a further embodiment of the present invention, a floating compensation seat is machined at the position where the right side of the magnetic connector connects to the center of the left side of the outer shell.

[0014] As a further embodiment of the present invention, the snap-fit ​​component includes a fixing frame, a connecting plate is fixedly connected to the right side of the fixing frame, a plurality of snap-fit ​​plates are fixedly connected at equal intervals to the right side of the connecting plate, an L-shaped plate is snapped into the right side of each snap-fit ​​plate, a receiving groove is fixedly connected to the right side of each L-shaped plate, and a machine head is fixedly connected to the inside of each L-shaped plate. The fixing frame is connected to the top left side of the machine housing by bolts and threads.

[0015] As a further embodiment of the present invention, a trapezoidal block is machined inside the right side of each of the receiving grooves, and a mating groove adapted to the magnetic connector is opened at the center of the right side of the trapezoidal block. The two grippers can clamp onto the front and rear ends of the left side of the outer wall of the trapezoidal block.

[0016] The beneficial effects of this invention are:

[0017] (1) The support components adopt three sets of adjustment components symmetrical about the central axis of the support plate. With the level bubble positioning reference deviation, the triangular support point of the support plate can be adjusted slightly by the mechanical transmission structure of "lever-chuck-threaded ring". This solves the problem of the difficulty in calibrating the level of the printing platform of traditional equipment, ensuring that the hot plate plane is always in a horizontal state, providing a stable reference for the stacking printing of corrugated tubular workpieces, and reducing defects such as uneven workpiece wall thickness and dimensional deviation caused by plane tilt. The combination design of spring support rod and ball head support rod not only provides buffer support for the support plate to avoid vibration transmission caused by rigid support, but also ensures that the support plate is always in a stable stress state during the adjustment process by adapting the height change of the adjustment components through the ball head structure, further ensuring printing accuracy.

[0018] (2) Through the matching design of multiple filament rollers and multiple heads, it can be equipped with a variety of printing materials such as high toughness flexible tube material and hard interface material at the same time, which can meet the special structural requirements of "flexible tube bearing + rigid interface connection" of corrugated tube-shaped workpieces. It can complete the printing of workpieces with complex material combinations without changing the equipment, thus expanding the applicability of the equipment.

[0019] (3) The fixed component adopts an automated control structure of "electric telescopic rod-linkage mechanism-gripper", which, together with the precise positioning of the magnetic connector (the floating compensation seat can offset slight alignment deviation), realizes the rapid clamping and release of the machine head; the slot plate of the snap-fit ​​component can standardize the temporary storage of idle machine heads, avoiding damage to components caused by random placement of machine heads. The entire head replacement process does not require manual disassembly of bolts, greatly shortening downtime and improving production efficiency.

[0020] (4) Through the coordinated work of the above-mentioned mechanisms, the support components accurately calibrate the level of the support plate with the help of three sets of adjustment components, and with the help of buffer support to prevent vibration, the printing accuracy is guaranteed. The multi-filament roller is compatible with multiple materials and meets the different needs of the workpiece. The automated head changing system realizes the rapid switching of the head, and the slot plate temporarily stores the idle head, which greatly improves the printing efficiency and equipment applicability. Attached Figure Description

[0021] Figure 1 This is a schematic diagram of the connection structure of the 3D printing equipment for producing corrugated tubular workpieces according to the present invention;

[0022] Figure 2 This is the present invention. Figure 1 Another isometric connection structure diagram;

[0023] Figure 3 This is the present invention. Figure 1 A schematic diagram of the connection structure of the printing mechanism;

[0024] Figure 4 This is the present invention. Figure 3 Another isometric connection structure diagram;

[0025] Figure 5 This is the present invention. Figure 3 Schematic diagram of the connection structure of the middle snap-fit ​​component;

[0026] Figure 6 This is the present invention. Figure 5 Another isometric connection structure diagram;

[0027] Figure 7 This is a schematic diagram of the connection structure of the fixing component in the present invention 3;

[0028] Figure 8 This is the present invention. Figure 7 A top-view cross-sectional schematic diagram of the connection structure of the fixed component in the middle;

[0029] Figure 9 This is the present invention. Figure 3 Schematic diagram of the connection structure of the intermediate support component;

[0030] Figure 10 This is the present invention. Figure 9 A schematic diagram of the connection structure on the other isometric view, excluding the support base;

[0031] Figure 11 This is the present invention. Figure 9 A schematic diagram of the connection structure of a single adjustment component;

[0032] Figure 12 This is the present invention. Figure 11 A frontal view of the connection structure;

[0033] Figure 13 This is the present invention. Figure 11 A schematic diagram of the connection structure of the lever, chuck, and adapter on another isometric view.

[0034] In the diagram: 1. Base; 2. Housing; 3. Fixing frame; 4. Gate; 5. Support frame; 6. Silk roller; 7. Printing mechanism; 701. Base plate; 702. Gantry frame; 703. Supporting component; 7031. Support seat; 7032. Spring strut; 7033. Support plate; 7034. Ball head strut; 7035. Sleeve; 7036. Threaded ring; 7037. Ball head threaded rod; 7038. Lever; 7039. Chuck; 70310. Adapter; 70311. Support rod; 704. Fixing component; 7041. Limiting slider; 7042. 7043. Threaded pipe; 7044. Electric telescopic rod one; 7045. Fixing plate; 7046. Outer shell; 7047. Electric telescopic rod two; 7048. First connecting rod; 7049. Support head one; 7040. Second connecting rod; 70410. Connecting head; 70411. Third connecting rod; 70412. Support head two; 70413. Gripper; 70414. Magnetic connector; 705. Snap-fit ​​component; 7051. Fixing frame; 7052. Connecting plate; 7053. Slot plate; 7054. L-shaped plate; 7055. Receiving groove; 7056. Machine head. Detailed Implementation

[0035] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0036] Example 1, please refer to Figures 1-4 and Figures 9-13 As shown, the present invention is a 3D printing equipment for producing corrugated tubular workpieces, including a base 1, which is used to fix and support the housing 2 and can isolate the housing 2 from the ground or the table on which the printing equipment is placed to prevent the equipment from getting damp. The housing 2 is fixedly connected to the top of the base 1. The housing 2 is used to fix and install the support frame 5 and the printing mechanism 7. The right side of the housing 2 integrates a control center for operating the printing mechanism 7. A fixing frame 3 is fixedly connected to the inside of the front surface of the housing 2. The fixing frame 3 is used to support the gate 4. The gate 4 is rotatably connected to the left side of the inside of the fixing frame 3 through a pin. The gate 4 is used to enclose the inside of the housing 2. A support frame 5 is fixedly connected to the bottom left side of the housing 2. The support frame 5 is used to support the filament rollers 6. Multiple filament rollers 6 are rotatably connected to the inner side of the support frame 5 at equal intervals. The filament rollers 6 are used to wind filaments of different materials and colors. The printing mechanism 7 is set inside the housing 2. The printing mechanism 7 is used to perform 3D printing processing on corrugated tubular workpieces.

[0037] The printing mechanism 7 includes a base plate 701, which is used to fix the gantry 702. The gantry 702 is fixedly connected to the top of the base plate 701. The gantry 702 is used to drive the support member 703 and the fixing member 704 to move. The support member 703 is provided at the bottom inner side of the gantry 702. The support member 703 is used to place the hot plate used for printing the workpiece and can drive it to move up and down. The fixing member 704 is provided at the top inner side of the gantry 702. The fixing member 704 is used to fix the print head 7056 in the snap-fit ​​member 705 and can drive the print head 7056 to move laterally and longitudinally. The snap-fit ​​member 705 is provided on the left side of the gantry 702. The snap-fit ​​member 705 is used to snap the print head 7056, so that when the print head 7056 is replaced, other print heads 7056 can be snapped back to its right side. The base plate 701 is fixed to the bottom inner side of the housing 2.

[0038] In this embodiment, preferably, the support member 703 includes a support base 7031, which is used to drive the entire support member 703 to move vertically. Multiple spring struts 7032 are equidistantly fixed to the outer top of the support base 7031, and these spring struts 7032 support the support plate 7033. The top of the multiple spring struts 7032 is fixed to the support plate 7033, which is used to hold the hot plate needed for 3D printing the workpiece. A ball-head strut 7 is rotatably connected to the rear left side of the bottom of the support plate 7033. 034 is used to support the left rear end of the support plate 7033. The bottom left front end and right front and rear ends of the support plate 7033 are provided with an adjustment assembly consisting of a sleeve 7035, a threaded ring 7036, a ball-head threaded rod 7037, a lever 7038, a chuck 7039, an adapter 70310 and a support rod 70311. Through the cooperation of the adjustment assembly, the level of the support plate 7033 can be adjusted. The back of the support seat 7031 is threadedly connected to the bottom end of the outer wall of the lead screw in the gantry 702, which is responsible for vertical movement, through a threaded block.

[0039] In this embodiment, preferably, the adjusting component includes a sleeve 7035, which supports the threaded ring 7036 and allows the threaded ring 7036 to rotate at its top. The top of the sleeve 7035 is rotatably connected to the threaded ring 7036, which is used to adjust the support height of the ball-end threaded rod 7037. The ball-end threaded rod 7037 is internally threaded to the threaded ring 7036 and supports the bottom left front end and right front and rear ends of the support plate 7033. A lever 7038 is provided on the left side of the threaded ring 7036, which drives the chuck 7039 to move. The chuck 7039 is fixed to the right side of the lever 7038 and can engage with the threaded ring 7036 so that the lever 7038 can drive the threaded ring 7036 to rotate, thereby adjusting the support height of the ball-end threaded rod 7037. The degree is adjusted. An adapter 70310 is rotatably connected to the bottom of the chuck 7039. The adapter 70310 supports the chuck 7039 and allows it to rotate inside the threaded ring 7036. A support rod 70311 is provided on the bottom left side of the outer wall of the lever 7038. The support rod 70311 supports the lever 7038. The sleeve 7035 is fixed to the top of the support base 7031. The ball-head threaded rod 7037... The outer wall thread is connected to the inner wall of the threaded ring 7036, and the bottom end of the outer wall of the ball head threaded rod 7037 is inserted into the inside of the sleeve 7035. The chuck 7039 is set inside the top of the threaded ring 7036. The adapter 70310 is rotatably connected to the bottom end inside the top of the threaded ring 7036. The bottom of the support rod 70311 is fixedly connected to the top of the support seat 7031, and the left side of the lever 7038 can be engaged with the top of the support rod 70311.

[0040] In this embodiment, preferably, multiple adjustment components are symmetrical about the central axis of the support plate 7033. When it is necessary to adjust the level of the support plate 7033, a level bubble is placed at the center of the top of the support plate 7033. Then, the support height of the triangular part of the support plate 7033 is adjusted by the three adjustment components, thereby adjusting the overall level of the support plate 7033. When the adjustment components are working, the lever 7038 is first removed from the top of the support rod 70311, and then the lever 7038 is moved down or up. The lever 7038 can drive the chuck 7039 to tilt, thereby enabling the chuck 7039 to engage with the threaded ring 7036. Then, by rotating the lever 7038, the threaded ring 7036 can be rotated, thereby causing the ball head threaded rod 7037 to unscrew from the inside of the threaded ring 7036, thereby adjusting the support height of the ball head threaded rod 7037, so as to adjust the overall level of the support plate 7033.

[0041] In this embodiment, preferably, multiple filament inlets are equidistantly provided on the top left side of the housing 2. The filaments wound on the outer wall of the filament roller 6 can enter the interior of the housing 2 through the filament inlets. With the arrangement of multiple filament rollers 6 and multiple printing heads 7056, multiple material output units can be equipped when printing corrugated tubular workpieces. One unit is used to print high-toughness, flexible tubular materials, and the other unit is used to print rigid interface or support materials.

[0042] In summary, the support base 7031 is connected to the lead screw in the gantry 702, which is responsible for vertical movement, via a threaded block on its back, thereby achieving the vertical lifting and lowering of the support component 703 as a whole. Multiple spring struts 7032, equidistantly fixed to the outer top of the support base 7031, provide stable support for the upper support plate 7033. The support plate 7033 is used to hold the hot plate required for 3D printing. Simultaneously, the ball-head strut 7034 at the rear left side of the bottom of the support plate 7033 provides auxiliary support at that position. Three sets of symmetrical adjustment components, centered on the central axis of the support plate 7033, are located at the front left side and the front and rear right sides of the bottom of the support plate 7033, working together to achieve precise adjustment of the support plate 7033's level. During adjustment, the spirit level is first placed at the center of the top of the support plate 7033. To determine the horizontal deviation, the lever 7038 is then removed from the top of the support rod 70311, which provides support. By moving the lever 7038 up or down, the chuck 7039 is tilted, engaging with the threaded ring 7036. Rotating the lever 7038 then rotates the threaded ring 7036 at the top of the sleeve 7035. Since the threaded ring 7036 is threadedly connected to the ball-head threaded rod 7037, and the bottom of the ball-head threaded rod 7037 is inserted into the sleeve 7035, the rotation of the threaded ring 7036 causes the ball-head threaded rod 7037 to rise and fall vertically. By adjusting the support height at the triangular part of the support plate 7033, the overall level of the support plate 7033 is adjusted, providing a stable horizontal printing foundation for the precise printing of corrugated tubular workpieces.

[0043] Example 2, please refer to Figures 1-4 , Figure 7 and Figure 8 As shown, based on Embodiment 1, the fixing component 704 includes a limiting slider 7041, which limits the overall movement direction of the fixing component 704 so that it can maintain linear movement. A threaded tube 7042 is fixedly connected inside the limiting slider 7041, which drives the limiting slider 7041 to move. An electric telescopic rod 7043 is fixedly connected to the bottom of the limiting slider 7041, which drives the fixing plate 7044 to move. The fixing plate 7044 is fixedly connected to the bottom of the electric telescopic rod 7043, which fixes the outer shell 7045. The threaded tube 7042 is threadedly connected to the outer wall of the lead screw in the gantry 702 that is responsible for longitudinal movement.

[0044] In this embodiment, preferably, the fixing member 704 further includes a housing 7045, which is used to fix the electric telescopic rod 7046. The electric telescopic rod 7046 is fixedly connected to the right side of the inside of the housing 7045. The electric telescopic rod 7046 is used to drive the first connecting rod 7047 to move. The first connecting rod 7047 is fixedly connected to the left side of the electric telescopic rod 7046. A support head 7048 is fixedly connected to the center of the front and rear ends of the outer wall of the housing 7045. The support head 7048 is used to support the right side of the connector 70410, so that it can rotate about the connection point between the support head 7048 and the connector. A second connecting rod 7049 is rotatably connected to the inner side of the front end and the inner side of the rear end of the first connecting rod 7047. Rod 7049 is used to connect the first link 7047 and the connector 70410. When the first link 7047 drives the second link 7049 to move, the second link 7049 drives the connector 70410 to move inward, thereby driving the third link 70411 to move synchronously through the connector 70410. The outer sides of both second links 7049 are rotatably connected to the connector 70410, and the right side of the connector 70410 is rotatably connected to the left side of the support head 7048 by a pin. The left sides of both connectors 70410 are rotatably connected to the third link 70411 by a pin. The third link 70411 is used to drive the right side of the gripper 70413 to move. The front and rear ends of the outer wall of the outer casing 7045 are also connected. Support heads 70412 are fixedly connected to the center of the left side of the housing 7045. Support heads 70412 support grippers 70413, allowing grippers 70413 to rotate about the connection point with support heads 70412. Grippers 70413 are rotatably connected to the left side of support heads 70412 via pins, and the right side of grippers 70413 is rotatably connected to the left side of the third connecting rod 70411 via pins. Grippers 70413 clamp the trapezoidal blocks in the receiving grooves 7055 of the snap-fit ​​component 705. A magnetic connector 70414 is installed at the center of the left side of the housing 7045, used for snap-fitting the receiving grooves 7055. The housing 7045 is fixed to the bottom of the fixing plate 7044. When replacing the machine head 7056, the electric telescopic rod 7043 starts working, moving the outer casing 7045 to a position level with the machine head 7056. Then, the machine head 7056, originally installed with the fixed component 704, is snapped into the slot plate 7053. Next, the electric telescopic rod 7046 moves the first connecting rod 7047, which in turn moves the second connecting rod 7049 to the right side of the outer casing 7045. This allows the connecting head 70410 to rotate around the support head 7048, and the connecting head 70410 then moves the third connecting rod 70411, causing the gripper 70413 to open to the left, thus releasing the clamp on the trapezoidal block.Then, the gantry 702 moves the fixing component 704 to the right, separating it from the machine head 7056 that was originally connected to it. The fixing component 704 is then re-connected to the machine head 7056 to be replaced, allowing the magnetic connector 70414 to insert into the mating groove inside the receiving groove 7055. After successful connection, the electric telescopic rod 7046 resets. Through the cooperation of the first connecting rod 7047, the second connecting rod 7049, the connector 70410, the third connecting rod 70411, and the gripper 70413, the gripper 70413 can re-clamp onto the outside of the replaced trapezoidal block, thus completing the replacement of the machine head 7056.

[0045] In this embodiment, preferably, a floating compensation seat is machined at the position where the right side of the magnetic connector 70414 connects to the center of the left side of the outer casing 7045, so as to facilitate the insertion of the magnetic connector 70414 into the mating groove in the receiving groove 7055.

[0046] In this embodiment, preferably, the snap-fit ​​component 705 includes a fixing frame 7051, which is used to fix the connecting plate 7052. The connecting plate 7052 is fixedly connected to the right side of the fixing frame 7051. The connecting plate 7052 is used to fix the grooved plate. A plurality of snap-fit ​​plates 7053 are fixedly connected at equal intervals to the right side of the connecting plate 7052. The snap-fit ​​plates 7053 are used to snap-fit ​​the L-shaped plate 7054. Each snap-fit ​​plate 7053 has an L-shaped plate 7054 snap-fitted inside its right side. 054 is used to fix the receiving groove 7055 and the die head 7056. Each L-shaped plate 7054 has a receiving groove 7055 fixed to its right side. The receiving groove 7055 is used to install and connect the L-shaped plate 7054 and the die head 7056 to the fixing component 704. Each L-shaped plate 7054 has a die head 7056 fixed inside. The die head 7056 is used to heat and extrude the filaments wrapped around the outer wall of the filament roller 6. The fixing frame 7051 is connected to the top left side of the inside of the housing 2 by bolt threads.

[0047] In this embodiment, preferably, a trapezoidal block is machined inside the right side of each receiving groove 7055, and a mating groove adapted to the magnetic connector 70414 is opened at the center of the right side of the trapezoidal block, and two grippers 70413 can clamp onto the front and rear ends of the left side of the outer wall of the trapezoidal block.

[0048] In summary, the fixed component 704 uses the limiting slider 7041 as its moving reference. Its internally fixed threaded tube 7042 is threadedly connected to the lead screw in the gantry 702 responsible for longitudinal movement. It can achieve overall longitudinal translation with the power of the gantry 702. The electric telescopic rod 7043 at the bottom of the limiting slider 7041 can drive the outer casing 7045 to rise and fall, ensuring precise alignment between the fixed component 704 and the machine head 7056. The electric telescopic rod 7046 on the right side of the outer casing 7045 serves as the power source for the opening and closing of the gripper 70413. By driving the first connecting rod 7047 to move, it also links the second connecting rod 7049, the connector 70410, and the third connecting rod 70413. 411, thereby controlling the gripper 70413 to open and close around the support head 70412, and the magnetic connector 70414 on the left side of the outer shell 7045 can accurately dock with the side structure of the machine head 7056; the snap-fit ​​component 705 is fixed to the top left side of the machine housing 2 by the fixing bracket 7051, and multiple equally distributed snap-fit ​​plates 7053 are supported by the connecting plate 7052. The snap-fit ​​plate 7053 forms a snap-fit ​​limit on the L-shaped plate 7054. The receiving groove 7055 fixed on the right side of the L-shaped plate 7054 is fixed to the machine head 7056 on one hand, and the trapezoidal block and central docking groove machined inside its right side provide a reliable docking structure for the fixing component 704. When the printhead 7056 needs to be replaced, the currently connected printhead 7056 is first temporarily stored in the slot plate 7053. The second electric telescopic rod 7046 retracts, driving the first connecting rod 7047 to move. Through the linkage mechanism, the gripper 70413 opens to release the trapezoidal block. The gantry 702 drives the fixing component 704 to move to the right and separate from the original printhead 7056. Then, the fixing component 704 moves to the target printhead 7056. The first electric telescopic rod 7043 adjusts its height, and the magnetic connector 70414 is inserted into the docking slot with the assistance of the floating compensation seat to complete the initial positioning. The second electric telescopic rod 7046 resets, driving the linkage mechanism to make the gripper 70413 re-clamp the trapezoidal block of the new printhead 7056, realizing the rapid replacement of the printhead 7056. Combined with the movement function of the gantry 702 in Embodiment 1, it ensures the accuracy and efficiency of the printhead 7056 switching when printing multiple materials.

[0049] Example 3, please refer to Figures 1-13As shown, this embodiment is obtained by combining Embodiment 1 and Embodiment 2. The 3D printing equipment consists of core parts such as base 1, housing 2, and printing mechanism 7 working together: base 1 stably supports housing 2 to prevent moisture, control center on housing 2 is responsible for overall control, multiple filament rollers 6 on support frame 5 on the left side of housing 2 are wound with filaments of different materials or colors, and these filaments enter the equipment through filament inlet on the left side of housing 2 for printing. The printing mechanism 7 is the core working unit. Its base plate 701 is fixed inside the housing 2, and the gantry frame 702 at the top provides moving support for each component. Before printing, the printing reference is calibrated by the support component 703. The support seat 7031 achieves overall lifting by means of the threaded block and the lead screw of the gantry frame 702. The spring support rod 7032 and the ball head support rod 7034 at the top support the support plate 7033 on which the hot plate is placed. If it is necessary to adjust the level, simply place the spirit level bubble in the center of the support plate 7033, and drive the threaded ring 7036 to rotate by turning the lever 7038 of the adjustment component, thereby changing the height of the ball head threaded rod 7037 and accurately calibrating the level of the support plate 7033. During printing, the gantry 702 drives the fixed component 704 to move longitudinally. The limiting slider 7041 of the fixed component 704 ensures stable movement. The electric telescopic rod 7043 can adjust the height to align the print head 7056 with the printing position. The print head 7056, which is engaged in the gripper 70413 of the fixed component 704, heats and extrudes the filament to complete the printing. When it is necessary to change the print head 7056 to adapt to different materials, such as printing tubes with high-toughness materials or printing interfaces with hard materials, the current print head 7056 is first engaged in the slot plate 705 of the engaging component 705. 3. Temporary storage: The electric telescopic rod 7046 drives the gripper 70413 to open through the first connecting rod 7047, the second connecting rod 7049, and other structures. The gantry 702 drives the fixing component 704 to separate from the original machine head 7056, and then moves to the target machine head 7056. The magnetic connector 70414 is aligned with the docking groove of the receiving groove 7055 to complete the positioning. The electric telescopic rod 7046 resets so that the gripper 70413 re-clamps the trapezoidal block of the new machine head 7056, and printing can continue. Finally, the 3D printing of the corrugated tubular workpiece is completed efficiently.

[0050] The foregoing has provided a detailed description of one embodiment of the present invention, but this description is merely a preferred embodiment and should not be construed as limiting the scope of the invention. All equivalent variations and modifications made within the scope of the present invention should still fall within the scope of the present invention.

Claims

1. A 3D printing device for producing corrugated tubular workpieces, comprising a base, a housing fixedly connected to the top of the base, a fixing frame fixedly connected to the inside of the front surface of the housing, a stop door rotatably connected to the left side of the fixing frame via a pin, a support frame fixedly connected to the bottom left side of the housing, and a plurality of filament rollers rotatably connected at equal intervals to the inner side of the support frame, characterized in that... The machine casing is equipped with a printing mechanism; The printing mechanism includes a base plate, a gantry frame is fixedly connected to the top of the base plate, a support member is provided at the bottom inner side of the gantry frame, a fixing member is provided at the top inner side of the gantry frame, a snap-fit ​​member is provided on the left side of the gantry frame, and the base plate is fixedly connected to the bottom inner side of the machine housing. The supporting component includes a support base, with multiple spring struts fixedly connected at equal intervals on the top outer side of the support base. A support plate is fixedly connected to the top of the multiple spring struts. A ball-head strut is rotatably connected to the bottom left rear end of the support plate. An adjustment assembly consisting of a sleeve, a threaded ring, a ball-head threaded rod, a lever, a chuck, an adapter, and a support rod is provided at the bottom left front end and the front and rear right ends of the bottom of the support plate. The back of the support base is threadedly connected to the bottom end of the outer wall of the lead screw responsible for vertical movement in the gantry frame via a threaded block.

2. The 3D printing equipment for producing corrugated tubular workpieces according to claim 1, characterized in that, The adjusting assembly includes a sleeve, a threaded ring rotatably connected to the top of the sleeve, a ball-head threaded rod threaded internally connected to the threaded ring, a lever on the left side of the threaded ring, a chuck fixedly connected to the right side of the lever, an adapter rotatably connected to the bottom of the chuck, a support rod on the bottom left side of the lever's outer wall, the sleeve fixedly connected to the top of the support base, the outer wall of the ball-head threaded rod threadedly connected to the inner wall of the threaded ring, and the bottom end of the outer wall of the ball-head threaded rod inserted into the sleeve, the chuck located inside the top of the threaded ring, the adapter rotatably connected to the bottom end inside the top of the threaded ring, the bottom of the support rod fixedly connected to the top of the support base, and the left side of the lever capable of engaging the top of the support rod.

3. The 3D printing equipment for producing corrugated tubular workpieces according to claim 1, characterized in that, The plurality of adjustment components are symmetrical about the central axis of the support plate.

4. The 3D printing equipment for producing corrugated tubular workpieces according to claim 1, characterized in that, Multiple filament inlets are equidistantly provided on the top left side of the housing, allowing the filaments wound around the outer wall of the filament roller to enter the interior of the housing through these inlets.

5. The 3D printing equipment for producing corrugated tubular workpieces according to claim 1, characterized in that, The fixing component includes a limiting slider, a threaded tube is fixedly connected inside the limiting slider, an electric telescopic rod is fixedly connected to the bottom of the limiting slider, a fixing plate is fixedly connected to the bottom of the electric telescopic rod, and the threaded tube is threadedly connected to the outer wall of the lead screw in the gantry frame that is responsible for longitudinal movement.

6. The 3D printing equipment for producing corrugated tubular workpieces according to claim 1, characterized in that, The fixing component also includes a housing. An electric telescopic rod two is fixedly connected to the right side of the housing's interior. A first connecting rod is fixedly connected to the left side of the electric telescopic rod two. Support heads one are fixedly connected to the center of the front and rear ends of the housing's outer wall. Second connecting rods are rotatably connected to the inner sides of the front and rear ends of the first connecting rod. Connecting heads are rotatably connected to the outer sides of both second connecting rods, and the right side of each connecting head is rotatably connected to the left side of the support head one via a pin. Third connecting rods are rotatably connected to the left sides of both connecting heads via pins. Support heads two are fixedly connected to the center of the left side of the front and rear ends of the housing's outer wall. A clamp is rotatably connected to the left side of each support head two via a pin, and the right side of the clamp is also rotatably connected to the left side of the third connecting rod via a pin. A magnetic connector is installed at the center of the left side of the housing. The housing is fixedly attached to the bottom of the fixing plate.

7. The 3D printing equipment for producing corrugated tubular workpieces according to claim 6, characterized in that, A floating compensation seat is machined at the position where the right side of the magnetic connector connects to the center of the left side of the outer shell.

8. The 3D printing equipment for producing corrugated tubular workpieces according to claim 1, characterized in that, The snap-fit ​​component includes a fixing frame, a connecting plate fixedly connected to the right side of the fixing frame, and multiple snap-fit ​​plates fixedly connected at equal intervals to the right side of the connecting plate. Each snap-fit ​​plate has an L-shaped plate snapped into its right side, and each L-shaped plate has a receiving groove fixedly connected to its right side. Each L-shaped plate has a machine head fixedly connected inside its interior. The fixing frame is connected to the top left side of the machine housing by bolts and threads.

9. The 3D printing equipment for producing corrugated tubular workpieces according to claim 8, characterized in that, Each of the receiving grooves has a trapezoidal block machined inside on the right side, and a mating groove adapted to the magnetic connector is opened at the center of the right side of the trapezoidal block. The two grippers can clamp onto the front and rear ends of the left side of the outer wall of the trapezoidal block.

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