3D printing equipment based on strip-shaped raw materials

Abstract

The invention relates to 3D printing equipment based on strip-shaped raw materials, and belongs to the technical field of additive manufacturing. The 3D printing equipment comprises a shell, and the space in the shell is a closed vacuum atmosphere cabin; a constant-temperature quick-cooling quick-heating printing base is arranged in the shell and is electrically connected with the temperature controller; a workbench used for providing a workpiece machining place is arranged on the constant-temperature quick-cooling quick-heating printing base, and the Joule heating quick-melting discharging head is fixed to the upper portion of the workbench through the three-dimensional movement mechanism and used for machining workpieces. The feeding end of the Joule heating and rapid melting discharging head is connected with a storage mechanism through a feeding mechanism, and the feeding mechanism is a double-knurl-wheel meshing conveying mechanism. The Joule heating rapid melting discharging head comprises a melting bin, the bin bottom of the melting bin is a discharging nozzle of a cone structure, and strip-shaped materials are rapidly melted through Joule heating. 3D printing of the strip-shaped raw materials is achieved, metal or non-metal materials can be printed, and the application range is wide.

Description

Technical Field

[0001] The present invention belongs to the technical field of additive manufacturing, and in particular relates to a 3D printing device based on strip-shaped raw materials. Background Art

[0002] 3D printer, also known as three-dimensional printer (3DP), is a kind of cumulative additive manufacturing technology, that is, a machine of rapid prototyping technology. 3D printer is a kind of machine that uses three-dimensional model as the basis, and uses special resin liquid, wax material, powdered metal or plastic and other adhesive materials to make three-dimensional objects by bonding materials through layer-by-layer cumulative additive printing. At present, 3D printers are used to manufacture various products, and the three-dimensional objects are constructed by layer-by-layer printing. The principle is to put the raw materials into the 3D printer, and the machine will manufacture the products layer by layer in the form of various thin layer stacking according to the program.

[0003] The biggest difference between 3D printers and traditional printers is that the "ink" they use is real raw materials. There are many forms of stacking thin layers, and the types of media that can be used for printing are diverse, from a variety of plastics to metals, ceramics, and rubber-like substances. Layers are stacked up until a solid object is formed, forming a three-dimensional object, completing 3D printing.

[0004] However, most 3D printers currently use conventional resin liquid, wax, powdered metal or plastic as raw materials for printing, and the size and shape of the printing materials are currently limited to liquid, slurry, powder, and filament. There is no equipment that uses strip materials as raw materials for 3D printing, which seriously limits the scalability of 3D printing technology, making some materials unusable for 3D printing and restricting the rapid development of new materials. For example, some types of amorphous alloys can be easily made into thin strips for use, but there is no suitable 3D printing equipment to cooperate with them to make them play a better role and achieve application promotion. Summary of the invention

[0005] In view of the shortcomings of the prior art, the present invention provides a 3D printing device based on strip-shaped raw materials, which can realize 3D printing with strips as raw materials, and at the same time can control the temperature of the printing environment and the print head.

[0006] A 3D printing device based on strip-shaped raw materials comprises a shell, the space inside the shell is a closed vacuum / atmosphere chamber; a constant temperature / quick cooling / quick thermal printing base is arranged in the shell, and is electrically connected to a temperature controller; a workbench for providing a workpiece processing site is arranged on the constant temperature / quick cooling / quick thermal printing base, a Joule heating fast melting discharge head is fixed above the workbench through the three-dimensional motion mechanism, and is used for processing the workpiece; a feeding end of the Joule heating fast melting discharge head is connected to a storage mechanism through a feeding mechanism, and the feeding mechanism is a double knurled wheel bite transmission mechanism.

[0007] The shell wall is provided with a vacuum\atmosphere chamber gas inlet and a vacuum\atmosphere chamber gas exhaust port, and different atmospheres are provided through the vacuum\atmosphere chamber gas inlet according to the requirements of different printing samples.

[0008] The front door of the vacuum / atmosphere chamber is provided with a sealing strip and a sealing locking mechanism.

[0009] The constant temperature\fast cooling\fast heating printing base is a fixed base made of copper, a cold circulation flow channel is opened inside the fixed base, and is connected to the cooling circulation system input port and cooling circulation system output port opened on the shell through pipelines; a high-temperature ceramic heating plate is arranged above the fixed base.

[0010] The Joule heating rapid melting discharge head is a Joule heating discharge head, which is made of graphite / high temperature alloy material and the temperature can reach ℃.

[0011] The feeding mechanism is a double knurled wheel engagement transmission mechanism.

[0012] The three-dimensional motion mechanism includes an X-axis moving mechanism, a Y-axis moving mechanism and a Z-axis moving mechanism arranged perpendicular to each other. The Y-axis moving mechanism includes an X-axis slider slidably connected to a constant temperature, rapid cooling and rapid thermal printing base, bosses are arranged on both sides of the Y-axis slider, and grooves matching the bosses are arranged on both sides of the constant temperature, rapid cooling and rapid thermal printing base; the Y-axis slider is threadedly connected to a first lead screw driven by a servo motor to realize the Y-direction movement of the Joule heating rapid melting discharge head; the Z-axis moving mechanism includes two symmetrically arranged second lead screws driven by a servo motor and a Z-axis slider threadedly connected to the second lead screw, one end of the second lead screw is connected to the Y-axis slider to realize the Z-direction movement of the Joule heating rapid melting discharge head; the X-axis moving mechanism includes a third lead screw driven by a servo motor and an X-axis slider threadedly connected to the third lead screw, both ends of the third lead screw are connected to the Z-axis slider to realize the X-direction movement of the Joule heating rapid melting discharge head; the Joule heating rapid melting discharge head is installed on an X-axis slider that can slide left and right.

[0013] The Joule heating rapid melting discharging head comprises a melting bin fixed on an X-axis slider, the top of the melting bin is connected to the Joule heating device through an electrode, and the bottom of the melting bin is a discharging nozzle of a cone structure; a rectangular feeding port consistent with the cross-section of the strip-shaped material is provided on the top of the melting bin; a Joule heating rapid melting discharging head water cooling input port and a Joule heating rapid melting discharging head water cooling output port are provided on the Joule heating rapid melting discharging head, the Joule heating rapid melting discharging head water cooling input port is connected to the cooling circulation system input port provided on the shell through a pipeline, the Joule heating rapid melting discharging head water cooling output port is connected to the cooling circulation system output port provided on the shell, the connecting path of the Joule heating rapid melting discharging head water cooling input port and the Joule heating rapid melting discharging head water cooling output port surrounds the outside of the Joule heating rapid melting discharging head, and when the machine is turned on for printing, cooling circulating water is introduced to cool the feeding mechanism and the electrode on the Joule heating rapid melting discharging head.

[0014] The feeding mechanism includes a fixed frame and a driven wheel and a driving wheel connected to the fixed frame, the driving wheel is driven by a servo motor, two ends of the driven wheel are connected to springs, the ends of the springs are fixed to the fixed frame, and the spacing between the driven wheel and the driving wheel can be adjusted by the springs; in a non-working state, the driven wheel and the driving wheel are meshed through the spike-shaped protrusions and concave parts on the outer surface;

[0015] The feeding mechanism also includes a plurality of material guide tracks, one end of which is fixed on the X-axis slider and the other end is connected to the discharge port of the material storage mechanism; the discharge end of the material guide track is aligned between the driven wheel and the driving wheel.

[0016] The material storage mechanism includes a material coiling tray and a material coiling tray driving mechanism for driving the material coiling tray to rotate, and the material coiling tray driving mechanism is a servo motor electrically connected to a controller.

[0017] The beneficial effects of the present invention are as follows: the present invention provides a 3D printing device based on strip-shaped raw materials, which can quickly feed the strip-shaped raw materials into the Joule heating rapid melting discharge head through the cooperation of the adjustable double knurled wheel interlocking transmission mechanism and the storage mechanism, and can quickly move the Joule heating rapid melting discharge head through the three-dimensional motion mechanism, and can control the temperature in the cabin by controlling the constant temperature air-conditioning system, and can control the oxygen-free environment in the cabin by controlling the vacuum\atmosphere cabin, so as to meet the environment for manufacturing strip-shaped raw materials, realize 3D printing of strip-shaped raw materials, and one printer can print strip raw materials of various widths and thicknesses, and can print metal or non-metal materials, and has a wide range of applications.

[0018] In the present invention, the feeding mechanism is integrated with the Joule heating rapid melting discharge head, and the Joule heating can quickly heat up to 3000°C, thereby improving the printing efficiency. At the same time, the constant temperature, rapid cooling, and rapid heating printing base of the present invention is provided with a cold circulation flow channel, which can control the temperature at a constant temperature of -20°C to -150°C, and the high temperature ceramic heating sheet above can be used for heating up to 550°C for preheating, thereby providing a temperature environment suitable for processing. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 A front view of a 3D printing device based on a strip-shaped material provided by the present invention;

[0020] Figure 2 The external schematic diagram of the 3D printing device based on the strip-shaped raw material provided by the present invention;

[0021] Figure 3 A perspective view of a 3D printing device based on a strip-shaped raw material provided by the present invention;

[0022] Figure 4 It is a schematic diagram of the workbench part in the present invention;

[0023] Figure 5 It is a schematic diagram of the Joule heating rapid melting discharge head part in the present invention;

[0024] Figure 6 Schematic diagram of the Y-axis moving mechanism in the present invention;

[0025] Figure 7 Schematic diagram of the X-axis moving mechanism in the present invention;

[0026] Figure 8 Schematic diagram of the Joule heating rapid melting discharge head in the present invention Figure 1 ;

[0027] Fig. 9 Schematic diagram of the Joule heating rapid melting discharge head in the present invention Figure 2 ;

[0028] Fig.10 Schematic diagram of the Joule heating rapid melting discharge head in the present invention Figure 3 ;

[0029] Fig.11 Schematic diagram of the Joule heating rapid melting discharge head in the present invention Figure 4 ;

[0030] Fig.12 Schematic diagram of the feeding mechanism in the present invention Figure 1 ;

[0031] Fig.13 It is a front view of the feeding mechanism in the present invention;

[0032] Fig.14 for Fig.13 A magnified view of part A in FIG.

[0033] Fig.15 Schematic diagram of the feeding mechanism in the present invention Figure 3 ;

[0034] Fig.16 for Fig.15 A magnified view of part B in FIG.

[0035] Fig.17 Schematic diagram of the feeding mechanism in the present invention Figure 4 ;

[0036] Fig.18 for Fig.17 The enlarged view of the C part in FIG.

[0037] Fig.19 It is a side view of the feeding mechanism in the present invention;

[0038] Fig. 20 for Fig.19 The enlarged view of the D part in FIG.

[0039] in:

[0040] 1- Material storage mechanism, 2- Constant temperature air conditioning system, 3- Controller, 4- X-axis moving mechanism, 5- Z-axis moving mechanism, 6- Y-axis moving mechanism, 7- Feeding mechanism, 8- Material guide track, 9- Joule heating fast melting discharging head, 10- Temperature controller, 11- Ambient temperature probe, 12- Oxygen sensor, 13- Sealed upper flip cover, 14- Sealed front door, 15- Sealed rear wall, 16- Sealed right wall, 17- Sealed left wall, 18- Workbench, 19- Cooling circulation system input port, 20- Cooling circulation system output port, 21 -Constant temperature\rapid cooling\rapid thermal printing base, 22-joule heating rapid melting discharge head water cooling input port, 23-joule heating rapid melting discharge head water cooling output port, 24-vacuum\atmosphere chamber gas input port, 25-vacuum\atmosphere chamber gas exhaust port, 26-monitoring camera, 27-humidity analyzer, 28-oxygen content analyzer, 29-sealing locking mechanism, 30-melting chamber, 31-discharge nozzle, 32-electrode, 33-driven wheel, 34-driving wheel, 35-strip raw material, 36-spring, 37-fixed frame. DETAILED DESCRIPTION

[0041] In order to better explain the present invention and facilitate understanding, the technical solutions and effects of the present invention are described in detail below through specific implementation modes in conjunction with the accompanying drawings.

[0042] like Figure 1-Figure 7As shown, a 3D printing device based on strip-shaped raw materials includes a shell, which is an openable structure, including a sealed flip cover 13 that can be flipped up, a sealed front door 14 that can be opened forward, and a sealed rear wall 15, a sealed right wall 16, and a sealed left wall 17 that are sealed and fixed.

[0043] The space inside the shell is a sealed vacuum\atmosphere chamber, and a vacuum\atmosphere chamber gas input port 24 and a vacuum\atmosphere chamber gas exhaust port 25 are provided on the shell wall. According to the requirements of different printing samples, different atmospheres are provided through the vacuum\atmosphere chamber gas input port 24, and the atmospheres are oxygen, nitrogen, argon, and hydrogen-argon mixed gas, etc. The specific atmosphere is determined according to the printing sample. The vacuum\atmosphere chamber front door 14 is provided with a sealing strip and a sealing locking mechanism 29, and the sealing locking mechanism adopts a common locking mechanism with a sealing ring.

[0044] The shell is provided with a constant temperature, rapid cooling, and rapid thermal printing base 21, which is electrically connected to the temperature controller 10. The constant temperature, rapid cooling, and rapid thermal printing base 21 is a fixed base made of copper, and a cold circulation flow channel is provided inside the fixed base, which is connected to the cooling circulation system input port 19 and the cooling circulation system output port 20 provided on the shell through a pipeline. The rapid cooling temperature of the constant temperature, rapid cooling, and rapid thermal printing base 21 can reach -20°C to 150°C and maintain a constant temperature, providing specific different temperature requirements according to different printing samples. A high-temperature ceramic heating plate is provided above the fixed base, which can provide a maximum of 550°C for preheating; a power supply is provided at the bottom of the constant temperature, rapid cooling, and rapid thermal printing base 21, which is electrically connected to the controller 3. A workbench 18 is provided on the constant temperature, rapid cooling, and rapid thermal printing base 21 to provide a workpiece processing site. The Joule heating rapid melting discharge head 9 is fixed above the workbench 18 through a three-dimensional motion mechanism for processing workpieces.

[0045] The three-dimensional motion mechanism includes an X-axis moving mechanism 4, a Y-axis moving mechanism 6 and a Z-axis moving mechanism 5 arranged perpendicular to each other. The Y-axis moving mechanism 6 includes an X-axis slider slidably connected to the constant temperature\fast cooling\fast thermal printing base 21, and bosses are arranged on both sides of the Y-axis slider. The constant temperature\fast cooling\fast thermal printing base 21 is correspondingly provided with grooves matching the bosses on both sides; the Y-axis slider is threadedly connected to the first lead screw driven by the servo motor, and the servo motor drives the first lead screw to rotate, driving the Y-axis slider to slide along the groove, thereby realizing the Y-direction movement of the Joule heating rapid melting discharge head 9. The Z-axis moving mechanism 5 includes two symmetrically arranged second lead screws driven by the servo motor and a Z-axis slider threadedly connected to the second lead screw, and one end of the second lead screw is connected to the Y-axis slider. The servo motor drives the second lead screw to rotate, driving the Z-axis slider to move up and down along the second lead screw, thereby realizing the Z-direction movement of the Joule heating rapid melting discharge head 9. The X-axis moving mechanism 4 includes a third lead screw driven by a servo motor and an X-axis slider threadedly connected to the third lead screw, and both ends of the third lead screw are connected to the Z-axis slider; the servo motor drives the third lead screw to rotate, driving the X-axis slider to move left and right along the third lead screw, thereby driving the Joule heating rapid melting discharge head 9 to move in the X direction. The Joule heating rapid melting discharge head 9 is installed on the X-axis slider that can slide left and right. The servo motor is electrically connected to the controller 3.

[0046] The Joule heating rapid melting discharge head 9 is a Joule heating discharge head, which is a graphite / high temperature alloy material, and the temperature can reach 3000°C, and can melt the strip material at a maximum temperature of 3000°C. The feeding end of the Joule heating rapid melting discharge head 9 is connected to the storage mechanism 1 through the feeding mechanism 7. The feeding mechanism 7 is a double knurled wheel bite transmission mechanism, which is fixed on the X-axis slider together with the Joule heating rapid melting discharge head 9.

[0047] like Figure 8-Figure 11As shown, the Joule heating rapid melting discharge head 9 includes a melting chamber 30 fixed on the X-axis slider, the top of the melting chamber 30 is connected to the Joule heating device through an electrode 32, and the bottom of the melting chamber 30 is a discharge nozzle 31 of a cone structure. A rectangular feed port consistent with the cross section of the strip material is opened on the top of the melting chamber 30, and the strip material enters the melting chamber 30 through the rectangular feed port, is rapidly melted by Joule heating, and flows out of the Joule heating rapid melting discharge head 9 through the discharge nozzle 31. The Joule heating rapid melting discharging head 9 is provided with a Joule heating rapid melting discharging head water cooling input port 22 and a Joule heating rapid melting discharging head water cooling output port 23. The Joule heating rapid melting discharging head water cooling input port 22 is connected to the cooling circulation system input port 19 provided on the shell through a pipeline (not shown in the figure), and the Joule heating rapid melting discharging head water cooling output port 23 is connected to the cooling circulation system output port 20 provided on the shell. The connecting path of the Joule heating rapid melting discharging head water cooling input port 22 and the Joule heating rapid melting discharging head water cooling output port 23 surrounds the outside of the Joule heating rapid melting discharging head 9. When the machine is turned on for printing, cooling circulating water is introduced to cool down the feeding mechanism 7 and the electrode 32 on the Joule heating rapid melting discharging head 9. The Joule heating rapid melting discharging head water cooling input port 22 and the Joule heating rapid melting discharging head water cooling output port 23 together with the cold circulation flow channel provided inside the fixed base constitute the cooling circulation system of the entire device.

[0048] like Figure 12-Figure 20 As shown, the feeding mechanism 7 includes a fixed frame 37 and a driven wheel 33 and a driving wheel 34 connected to the fixed frame 37, the driving wheel 34 is driven by a servo motor, and the servo motor is electrically connected to the controller 3; springs 36 are connected to both ends of the driven wheel 33, and the ends of the springs 36 are fixed to the fixed frame 37. The springs 36 can be used to adjust the spacing between the driven wheel 33 and the driving wheel 34 to adapt to strip materials 35 of different thicknesses. At the same time, after the spacing is adjusted, the driven wheel 33 is moved closer to the driving wheel 34 through elastic force, and has a tightening function. In the non-working state, the driven wheel 33 and the driving wheel 34 are meshed through the spike-shaped protrusions and concave parts on the outer surface; in the working state, when the strip material 35 reaches the driven wheel 33 and the driving wheel 34 through the top of the fixed frame 37, due to the thickness of the strip material 35, the elastic force of the spring 36 creates a gap between the driven wheel 33 and the driving wheel 34, thereby conveying the strip material 35 to the Joule heating rapid melting discharge head 9. The feeding mechanism 7 also includes a plurality of guide rails 8, which are rectangular parallelepiped, one end of which is fixed on the X-axis slider, and the other end is connected to the discharge port of the storage mechanism 1, and the discharge port is located in the upper left corner of the shell; the discharge end of the guide rail 8 is aligned between the driven wheel 33 and the driving wheel 34. The guide rail 8 is made of mica.

[0049] The material storage mechanism 1 includes a coiling tray and a coiling tray driving mechanism for driving the coiling tray to rotate. The coiling tray driving mechanism is a servo motor electrically connected to the controller 3, which allows the strip-shaped raw material 35 to enter the material guide track 8 through the discharge port and be transported to the Joule heating rapid melting discharge head 9 through the double knurled wheel bite conveying mechanism. The coiling tray includes multiple different sizes, and different coiling trays are replaced according to the actual strip size. The strip can be metal or non-metal, and the strip thickness and width can be adjusted according to actual conditions.

[0050] The housing is provided with a constant temperature air conditioning system 2, which is an air conditioner with rapid cooling and heating functions, electrically connected to the controller 3, and equipped with a temperature controller 10, which can cool and heat the air conditioner in a temperature range of 7°C-80°C. The constant temperature air conditioning system 2 is also equipped with an ambient temperature probe 11, which is electrically connected to the controller 3.

[0051] An ambient temperature probe 11 for monitoring ambient temperature is disposed inside the housing. The ambient temperature probe 11 is electrically connected to a temperature controller 10 to regulate the temperature inside the housing.

[0052] An oxygen sensor 12, an oxygen content analyzer 28 and a humidity analyzer 27 are also provided inside the housing, and are electrically connected to the controller 3. A monitoring camera 26 is also provided inside the housing, and is electrically connected to the controller 3.

[0053] The controller 3 is arranged on the side of the sealing right wall 16, and the controller 3 adopts PLC.

[0054] When in use, the graphics and material data of the object are first processed by computer software to design a three-dimensional model of the three-dimensional solid object to be printed, and the three-dimensional model of the three-dimensional solid object is sliced ​​and layered along the computer internal direction corresponding to the actual vertical direction to obtain the molding data of each layer. Then the above-mentioned 3D printing equipment based on strip-shaped raw materials is used to start printing: inert gas is introduced into the shell through the vacuum\atmosphere chamber gas inlet 24, and printing is performed under the protection of inert gas. At the same time, the ambient temperature is controlled at 10°C to 80°C by the constant temperature air conditioning system 2 and the temperature controller 10 according to the feedback of the ambient temperature probe 11, the oxygen sensor 12, the oxygen content analyzer 28 and the humidity analyzer 27. In this embodiment, the ambient temperature is kept constant at 60°C, the humidity is controlled at 5%, and the oxygen content is less than 10ppm. The storage mechanism 1 delivers the strip-shaped raw material 35 to the double knurled wheel interlocking transmission mechanism of the feeding mechanism 7 through the material guide track 8, and enters the Joule heating rapid melting discharge head 9 through the driving wheel 34 and the driven wheel 33, and flows out after melting; the servo motor of the three-dimensional motion mechanism is controlled by the controller 3, and the Joule heating rapid melting discharge head 9 moves horizontally in the X and Y directions under the drive of the X-axis moving mechanism 4 and the Y-axis moving mechanism 6, and moves up and down under the drive of the Z-axis moving mechanism 5, and prints the workpiece layer by layer on the workbench 18.

Claims

1. A 3D printing device based on strip-shaped materials, characterized in that: The invention comprises a shell, the space inside the shell is a sealed vacuum / atmosphere chamber; a constant temperature / quick cooling / quick thermal printing base (21) is arranged inside the shell and is electrically connected to a temperature controller (10); a workbench (18) for providing a workpiece processing site is arranged on the constant temperature / quick cooling / quick thermal printing base (21); a Joule heating fast melting discharge head (9) is fixed above the workbench (18) through the three-dimensional motion mechanism for processing the workpiece; the feed end of the Joule heating fast melting discharge head (9) is connected to a storage mechanism (1) through a feeding mechanism (7), and the feeding mechanism (7) is a double knurled wheel bite transmission mechanism.

2. A 3D printing device based on strip-shaped materials according to claim 1, characterized in that: The shell wall is provided with a vacuum / atmosphere chamber gas input port (24) and a vacuum / atmosphere chamber gas exhaust port (25). Different atmospheres are provided through the vacuum / atmosphere chamber gas input port (24) according to the requirements of different printing samples.

3. A 3D printing device based on strip-shaped materials according to claim 1, characterized in that: The vacuum / atmosphere chamber front door (14) is provided with a sealing strip and a sealing locking mechanism (29).

4. A 3D printing device based on strip-shaped materials according to claim 1, characterized in that: The constant temperature\fast cooling\fast heating printing base (21) is a fixed base made of copper, and a cold circulation flow channel is provided inside the fixed base, which is connected to a cooling circulation system input port (19) and a cooling circulation system output port (20) provided on the shell through a pipeline; a high-temperature ceramic heating plate is provided above the fixed base.

5. The 3D printing device based on strip-shaped materials according to claim 1, characterized in that: The Joule-heated rapid melting discharge head (9) is a Joule-heated discharge head made of graphite / high-temperature alloy material, and the temperature can reach 3000°C.

6. A 3D printing device based on strip-shaped materials according to claim 1, characterized in that: The feeding mechanism (7) is a double knurled wheel engagement transmission mechanism.

7. The 3D printing device based on strip-shaped materials according to claim 1, characterized in that: The three-dimensional motion mechanism comprises an X-axis moving mechanism (4), a Y-axis moving mechanism (6) and a Z-axis moving mechanism (5) which are arranged perpendicular to each other. The Y-axis moving mechanism (6) comprises an X-axis slider which is slidably connected to a constant temperature, rapid cooling or rapid thermal printing base (21). Bosses are arranged on both sides of the Y-axis slider. Grooves matching the bosses are correspondingly arranged on both sides of the constant temperature, rapid cooling or rapid thermal printing base (21). The Y-axis slider is threadedly connected to a first lead screw driven by a servo motor to realize the Y-direction movement of the Joule heating rapid melting discharge head (9). The Z-axis moving mechanism (5) The invention comprises two symmetrically arranged second lead screws driven by servo motors and Z-axis sliders threadedly connected to the second lead screws, one end of the second lead screw is connected to the Y-axis slider, so as to drive the Joule heating fast melting discharge head (9) to move in the Z direction; the X-axis moving mechanism (4) comprises a third lead screw driven by the servo motor and an X-axis slider threadedly connected to the third lead screw, both ends of the third lead screw are connected to the Z-axis slider, so as to drive the Joule heating fast melting discharge head (9) to move in the X direction; the Joule heating fast melting discharge head (9) is mounted on the X-axis slider which can slide left and right.

8. The 3D printing device based on strip-shaped materials according to claim 1, characterized in that: The Joule heating rapid melting discharge head (9) comprises a melting chamber (30) fixed on an X-axis slider, the top of the melting chamber (30) is connected to the Joule heating device via an electrode (32), and the bottom of the melting chamber (30) is a discharge nozzle (31) of a cone structure; a rectangular feed port consistent with the cross section of the strip-shaped material is provided on the top of the melting chamber (30); a Joule heating rapid melting discharge head water cooling input port (22) and a Joule heating rapid melting discharge head water cooling output port (23) are provided on the Joule heating rapid melting discharge head (9), and the Joule heating rapid melting discharge head water cooling input port (22) and the Joule heating rapid melting discharge head water cooling output port (23) are provided on the Joule heating rapid melting discharge head. (22) is connected to the cooling circulation system input port (19) opened on the shell through a pipeline, and the Joule heating rapid melting discharge head water cooling output port (23) is connected to the cooling circulation system output port (20) opened on the shell. The communication path between the Joule heating rapid melting discharge head water cooling input port (22) and the Joule heating rapid melting discharge head water cooling output port (23) surrounds the outside of the Joule heating rapid melting discharge head (9). When the machine is turned on for printing, cooling circulating water is introduced to cool the feeding mechanism (7) and the electrode (32) on the Joule heating rapid melting discharge head (9).

9. The 3D printing device based on strip-shaped materials according to claim 1, characterized in that: The feeding mechanism 7 () comprises a fixed frame (37) and a driven wheel 33 and a driving wheel 34 connected to the fixed frame (37), wherein the driving wheel (34) is driven by a servo motor, and springs (36) are connected to both ends of the driven wheel (33), and the ends of the springs (36) are fixed to the fixed frame (37), and the spacing between the driven wheel (33) and the driving wheel (34) can be adjusted by the springs (36); in a non-working state, the driven wheel (33) and the driving wheel (34) are meshed with each other through the spike-shaped protrusions and concave parts on the outer surfaces; The feeding mechanism (7) also includes a plurality of material guide rails (8), one end of which is fixed on the X-axis slider and the other end is connected to the discharge port of the material storage mechanism (1); the discharge end of the material guide rail (8) is aligned between the driven wheel (33) and the driving wheel (34).

10. The 3D printing device based on strip-shaped materials according to claim 1, characterized in that: The material storage mechanism (1) comprises a material coiling tray and a material coiling tray driving mechanism for driving the material coiling tray to rotate, and the material coiling tray driving mechanism is a servo motor electrically connected to the controller (3).

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