3D printing device capable of being accurately leveled and use method of 3D printing device

Abstract

The invention discloses a 3D printing device capable of achieving precise leveling and a using method thereof, and relates to the technical field of 3D printing devices.The 3D printing device comprises a 3D printing device body, a power source base is fixedly mounted at the bottom of the 3D printing device body, and an input device and a driving control device are fixedly mounted in the power source base; and a printing dustproof box body is fixedly mounted above the power supply base. Ranging reflection points on the surface of the printing bottom plate are in one-to-one correspondence with the positions of the laser ranging devices, the laser ranging devices generate laser rays to measure the distances between the four corners of the printing bottom plate and the movable cross beam, and after a difference value is obtained, signals are transmitted to the signal receiving control device through the signal conversion transmission device; the signal receiving control device controls the control motor to drive the driving gear to rotate, the driving gear drives the adjusting threaded rod to rotate through the driven gear, the leveling rod plays a limiting role, and the adjusting supporting rod moves up and down under the cooperation of the adjusting threaded rod and the leveling rod to adjust the heights of the four corners of the printing bottom plate.

Description

Technical Field

[0001] The present invention relates to the technical field of 3D printing devices, and in particular to a 3D printing device capable of precise leveling and a method for using the same. Background Art

[0002] As 3D printing technology matures, related mechanical devices also need to be constantly updated. During the printing process, ensuring the level of the printing base is an important prerequisite for achieving high-quality printing. Traditional fixed printing base leveling devices are mostly adjusted by manual leveling nuts distributed at the four corners of the printing base, and the leveling effect is tested by the paper drawing method. Although this can achieve better results, it also has the disadvantages of a relatively fixed moving range of the printing base and low leveling accuracy. Therefore, the present invention proposes a 3D printing device that can be accurately leveled and a method of using it.

[0003] In the prior art, a Chinese patent document with publication number CN111438943B and publication date June 11, 2021 is proposed to solve the above technical problems. The technical solution disclosed in the patent document is as follows: a mode switching component for manual and automatic modes and a 3D printer leveling device. The mode switching component can easily switch between manual and automatic gears by limiting and guiding the leveling sliding base through S-shaped sliding grooves, vertical grooves, V-shaped oblique grooves and leveling shift shafts. The 3D printer leveling device includes an automatic input component, a manual input component, an output component and the aforementioned mode switching component. The automatic input component and the manual input component are both installed on the leveling sliding base. When the mobile leveling sliding base switches between the manual gear and the automatic gear, the manual input component and the automatic input component are respectively docked with the output component.

[0004] In order to solve the problem of low leveling accuracy of traditional 3D printing, the existing technology uses S-shaped sliding grooves, vertical grooves, V-shaped oblique grooves and leveling shift shafts to limit and guide the leveling sliding base to achieve switching between manual gear and automatic gear. However, the leveling of the base plate may make it impossible to level one side of the whole, which in turn causes the bottom of the printed object to tilt toward one end due to the gravity and cannot be leveled in a targeted manner. Summary of the invention

[0005] The present invention provides a 3D printing device capable of precise leveling and a method of using the same to solve the problems raised in the above-mentioned background technology.

[0006] In order to solve the above technical problems, the technical solution adopted by the present invention is: In a first aspect, a 3D printing device that can be precisely leveled includes a 3D printing device body, a power base is fixedly installed at the bottom of the 3D printing device body, an input device and a drive control device are fixedly installed inside the power base, a printing dustproof box is fixedly installed above the power base, a 3D printing consumables installation slot is fixedly installed on the top of the printing dustproof box, a drive printing mechanism is arranged above the power base, and a precise leveling base mechanism is arranged in the lower middle part of the drive printing mechanism; the drive printing mechanism includes a beam drive moving unit and a print drive moving unit, the beam drive moving unit is arranged in the inner middle part of the print dustproof box, and the print drive moving unit is arranged in the middle part of the beam drive moving unit; the precise leveling base mechanism includes a mobile base unit and a control leveling unit, the mobile base unit is arranged above the power base, and the control leveling unit is arranged above the mobile base unit.

[0007] A further improvement of the technical solution of the present invention is that the beam driving moving unit includes a limit support frame fixedly installed on the middle part of both sides of the upper surface of the power base, a motor is fixedly installed on one side of the top of the limit support frame, a threaded rod is fixedly installed on the output shaft of the motor, and the lower end of the threaded rod is rotatably connected to the bottom of the limit support frame, the printing dustproof box plays a dustproof role, and the limit support frame plays a role of limiting the moving beam.

[0008] A further improvement of the technical solution of the present invention is that the beam-driven moving unit also includes a moving beam slidably installed on the outside of the limit support frame, an inner wall of one side of the moving beam is threadedly connected to the outer surface of the threaded rod, and a pulley adapted to the limit groove of the limit support frame is movably installed on the inner side of the moving beam, and the motor drives the threaded rod to rotate so that the moving beam moves up and down under the limit cooperation of the limit support frame.

[0009] A further improvement of the technical solution of the present invention is that: the beam driving moving unit also includes a side distance support rod fixedly installed on the side surface of the moving beam, a laser distance measuring device is fixedly installed on the front end of the side distance support rod, and a signal conversion and transmission device is fixedly installed on the rear end of the side distance support rod. The laser distance measuring device and the signal conversion and transmission device are connected through electrical signals. The laser distance measuring device generates laser rays to measure the distance between the four corners of the printing base plate and the moving beam. After obtaining the difference, the signal is transmitted to the signal receiving control device through the signal conversion and transmission device.

[0010] A further improvement of the technical solution of the present invention is that the printing drive mobile unit includes a driving mobile component slidably installed above the moving beam, and a consumable melting printing component is fixedly installed at the front end of the driving mobile component. The driving mobile component moves left and right on the moving beam to make the consumable melting printing component convenient for printing the model. The operation is stable and reliable, and the model printing accuracy is high.

[0011] A further improvement of the technical solution of the present invention is that: the mobile base unit includes a mobile base arranged on the upper surface of the power base, a driving moving component is fixedly installed inside the mobile base, and moving guide rails compatible with moving wheels of the driving moving component are fixedly installed on both sides of the upper surface of the power base. A printing base is arranged above the mobile base, and a ranging reflection point corresponding to the position of the laser ranging device is arranged on the upper surface of the printing base. The mobile base separates the printing base from the power base so that the printing base independently carries the model. The driving moving component cooperates with the moving guide rail so that the printing base can be adjusted in position, and the consumables are melted and the printing component is operated more efficiently to print and form the model.

[0012] A further improvement of the technical solution of the present invention is that: the movable base unit also includes a support seat fixedly installed in the middle of the inner surface of the movable base, a spherical support shaft sleeve is fixedly installed on the upper surface of the support seat, a spherical support shaft is rotatably installed on the inner surface of the spherical support shaft sleeve, the upper end of the spherical support shaft is fixedly connected to the middle of the lower surface of the printing base plate, the outer surfaces of the spherical support shaft sleeve and the spherical support shaft are sleeved with a buffer spring, the support seat supports the printing base plate through the spherical support shaft sleeve and the spherical support shaft, so that the printing base plate has good transition performance when it is tilted and during leveling, and its external buffer spring plays a role of buffering stability.

[0013] A further improvement of the technical solution of the present invention is that: the control leveling unit includes a leveling rod fixedly installed on the upper surface of the mobile base, the outer surface of the leveling rod is slidably connected to the four sides of the printing base, and the control leveling unit includes an adjustment threaded rod symmetrically rotatably installed on the four sides of the inner surface of the mobile base. The side support rods, the adjustment threaded rods and the signal receiving control device are symmetrically arranged around the printing base, and operate independently so that the height of the four sides of the printing base can be adjusted independently, thereby avoiding the printing base from tilting due to unstable center of gravity, thereby achieving the purpose of precise leveling.

[0014] A further improvement of the technical solution of the present invention is that: a driven gear is fixedly installed at the bottom of the adjusting threaded rod, a signal receiving control device is arranged on one side of the adjusting threaded rod, an access end of the signal receiving control device is electrically connected to an output end of a signal conversion transmission device, a control motor is fixedly installed at the output end of the signal receiving control device, a driving gear is fixedly installed on the output shaft of the control motor, the outer surface of the driving gear and the outer surface of the driven gear are meshed with each other, an adjusting support rod is arranged between the adjusting threaded rod and the signal receiving control device, the upper end of the adjusting support rod is slidably connected to the outer surface of the leveling rod, the lower end of the adjusting support rod is threadedly connected to the outer surface of the adjusting threaded rod, the upper surface of the adjusting support rod is in contact with the lower surface of the printing base plate, the signal receiving control device controls the control motor to drive the driving gear to rotate, the driving gear drives the adjusting threaded rod to rotate through the driven gear, the leveling rod plays a role of limiting, the adjusting support rod moves up and down in cooperation with the adjusting threaded rod and the leveling rod to adjust the height of the four corners of the printing base plate, so that the height distances of the four sides of the printing base plate and the moving beam are equal and kept level.

[0015] In a second aspect, a method for using a 3D printing device capable of precise leveling comprises the following steps: Step 1: Connect the power base to the power supply, install consumables and input model values; Step 2: Level the printing plate; Step 3, moving the crossbeam, driving the moving component, and driving the moving part to move to promote the melting of the filaments and the printing component to melt the spray filaments to print the model; Step 4: After printing, open the dustproof box to cool the model and shovel the model off the printing plate.

[0016] Due to the adoption of the above technical solution, the present invention has the following technical advances compared with the prior art: 1. The present invention provides a 3D printing device that can be precisely leveled and a method for using the same. The printing dustproof box plays a role in dustproofing, the limit support frame plays a role in limiting the moving beam, the motor drives the threaded rod to rotate so that the moving beam moves up and down under the limit cooperation of the limit support frame, and cooperates to drive the moving component to move left and right on the moving beam so that the consumables melt and the printing component is convenient for printing the model. The operation is stable and reliable, and the model printing accuracy is high.

[0017] 2. The present invention provides a 3D printing device that can be precisely leveled and a method for using the same. The mobile base separates the printing base from the power base, so that the printing base can independently carry the model. The driving moving parts cooperate with the moving guide rails to adjust the position of the printing base, and the consumables are melted and the printing assembly is operated more efficiently to print the model. The support seat supports the printing base through the spherical support sleeve and the spherical support shaft, so that the printing base has good transition performance when it is tilted and during the leveling process, and the external buffer spring plays a role of buffering stability.

[0018] 3. The present invention provides a 3D printing device capable of precise leveling and a method for using the same. The distance-measuring reflection points on the surface of the printing base plate correspond one to one with the positions of the laser distance-measuring device. The laser distance-measuring device generates laser rays to measure the distances between the four corners of the printing base plate and the moving crossbeam. After obtaining the difference, the signal is transmitted to the signal receiving control device through the signal conversion transmission device. The signal receiving control device controls the control motor to drive the driving gear to rotate. The driving gear drives the adjusting threaded rod to rotate through the driven gear. The leveling rod plays a role of limiting. The adjusting support rod moves up and down in cooperation with the adjusting threaded rod and the leveling rod to adjust the height of the four corners of the printing base plate, so that the height distances around the printing base plate and the moving crossbeam are equal and kept level.

[0019] 4. The present invention provides a 3D printing device that can be precisely leveled and a method for using the same. The side distance support rods, the adjustment threaded rods and the signal receiving control device are symmetrically arranged around the printing base plate. They operate independently so that the height of the four sides of the printing base plate can be independently adjusted to avoid the printing base plate from tilting due to unstable center of gravity, thereby achieving the purpose of precise leveling. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 It is a structural schematic diagram of the present invention; Figure 2 It is a schematic diagram of the internal structure of the present invention; Figure 3 It is a schematic diagram of the main structure of the structure of the present invention; Figure 4 It is a top view schematic diagram of the structural precision leveling base mechanism of the present invention.

[0021] Figure 5 It is a front schematic diagram of the structure precision leveling base mechanism of the present invention; Figure 6 It is a schematic diagram of the structural movable beam of the present invention.

[0022] In the figure: 1. 3D printing device body; 11. power base; 12. printing dustproof box; 2. drive printing mechanism; 21. limit support frame; 22. motor; 23. threaded rod; 24. moving crossbeam; 25. side distance support rod; 251. laser ranging device; 252. signal conversion and transmission device; 26. drive moving component; 27. consumable melting printing component; 3. precise leveling base mechanism; 31. moving base; 32. drive moving component; 33. moving guide rail; 34. printing base plate; 341. ranging reflection point; 35. leveling rod; 36. adjusting threaded rod; 361. driven gear; 37. signal receiving control device; 371. control motor; 372. driving gear; 38. adjusting support rod; 39. support seat; 391. spherical support sleeve; 392. spherical support shaft. Implementation

[0023] The present invention is further described in detail below in conjunction with embodiments: Example

[0024] like Figure 1-6As shown, the present invention provides a 3D printing device that can be accurately leveled, including a 3D printing device body 1, a power base 11 is fixedly installed at the bottom of the 3D printing device body 1, an input device and a drive control device are fixedly installed inside the power base 11, a printing dustproof box 12 is fixedly installed above the power base 11, and a 3D printing consumables installation card slot is fixedly installed on the top of the printing dustproof box 12, a drive printing mechanism 2 is arranged above the power base 11, and a precise leveling base mechanism 3 is arranged in the middle below the drive printing mechanism 2; the drive printing mechanism 2 includes a beam driving mobile unit and a printing driving mobile unit, the beam driving mobile unit is arranged in the middle of the printing dustproof box 12, and the printing driving mobile unit is arranged in the middle of the beam driving mobile unit; the precise leveling base mechanism 3 includes a mobile base unit and a control leveling unit, the mobile base unit is arranged above the power base 11, the control leveling unit is arranged above the mobile base unit, and the beam driving mobile unit includes a printing driving mobile unit and a printing driving mobile unit. The movable moving unit includes a limit support frame 21 fixedly installed in the middle of both sides of the upper surface of the power base 11, a motor 22 is fixedly installed on one side of the top of the limit support frame 21, and a threaded rod 23 is fixedly installed on the output shaft of the motor 22, and the lower end of the threaded rod 23 is rotatably connected to the bottom of the limit support frame 21. The beam driving movable unit also includes a movable beam 24 slidably installed on the outside of the limit support frame 21, and the inner wall of one side of the movable beam 24 is threadedly connected to the outer surface of the threaded rod 23, and a pulley compatible with the limit groove of the limit support frame 21 is movably installed on the inner side of the movable beam 24. The printing dustproof box 12 plays a dustproof role, and the limit support frame 21 plays a limiting role on the movable beam 24. The motor 22 drives the threaded rod 23 to rotate so that the movable beam 24 moves up and down under the limiting cooperation of the limit support frame 21, and cooperates to drive the movable component 26 to move left and right on the movable beam 24 to melt the consumables and the printing component 27 is convenient for printing the model. The operation is stable and reliable, and the model printing accuracy is high. Example

[0025] like Figure 1-6As shown, on the basis of Example 1, the present invention provides a technical solution: preferably, the beam driving moving unit also includes a side distance support rod 25 fixedly installed on the side surface of the moving beam 24, a laser distance measuring device 251 is fixedly installed on the front end of the side distance support rod 25, and a signal conversion transmission device 252 is fixedly installed on the rear end of the side distance support rod 25, and the laser distance measuring device 251 and the signal conversion transmission device 252 are connected through electrical signals. The printing driving moving unit includes a driving moving component 26 slidably installed above the moving beam 24, and a consumable melting printing component 27 is fixedly installed on the front end of the driving moving component 26. The side distance support rod 25, the adjusting threaded rod 36 and the signal receiving control device 37 are symmetrically arranged around the printing base plate 34, and operate independently so that the height of the four sides of the printing base plate 34 can be independently adjusted to avoid the printing base plate 34 from tilting due to unstable center of gravity, thereby achieving the purpose of precise leveling. Example

[0026] like Figure 1-6 As shown, on the basis of Example 1, the present invention provides a technical solution: preferably, the mobile base unit includes a mobile base 31 arranged on the upper surface of the power base 11, a driving moving component 32 is fixedly installed inside the mobile base 31, and moving guide rails 33 adapted to the moving wheels of the driving moving component 32 are fixedly installed on both sides of the upper surface of the power base 11. A printing base plate 34 is arranged above the mobile base 31, and a ranging reflection point 341 corresponding to the position of the laser ranging device 251 is arranged on the upper surface of the printing base plate 34. The mobile base unit also includes a support seat 39 fixedly installed in the middle of the inner surface of the mobile base 31, and a spherical support shaft sleeve 391 is fixedly installed on the upper surface of the support seat 39, and a spherical support shaft sleeve 391 is rotatably installed on the inner surface of the spherical support shaft sleeve 391. The support shaft 392, the upper end of the spherical support shaft 392 is fixedly connected to the middle of the lower surface of the printing base plate 34, the spherical support shaft sleeve 391 and the outer surface of the spherical support shaft 392 are sleeved with a buffer spring, the movable base 31 separates the printing base plate 34 from the power base 11, so that the printing base plate 34 independently carries the model, the driving moving component 32 cooperates with the movable guide rail 33 to allow the printing base plate 34 to adjust its position, and more efficiently cooperate with the consumables melting printing component 27 to print the model. The support seat 39 supports the printing base plate 34 through the spherical support shaft sleeve 391 and the spherical support shaft 392, so that the printing base plate 34 has good transition performance when it is tilted and during the leveling process, and its external buffer spring plays a role of buffering stability. Example

[0027] like Figure 1-6As shown, on the basis of Example 1, the present invention provides a technical solution: preferably, the control leveling unit includes a leveling rod 35 fixedly installed around the upper surface of the movable base 31, the outer surface of the leveling rod 35 is slidably connected to the four sides of the printing base plate 34, the control leveling unit includes an adjusting threaded rod 36 symmetrically rotatably installed around the inner surface of the movable base 31, a driven gear 361 is fixedly installed at the bottom of the adjusting threaded rod 36, a signal receiving control device 37 is arranged on one side of the adjusting threaded rod 36, the access end of the signal receiving control device 37 is electrically connected to the output end of the signal conversion transmission device 252, a control motor 371 is fixedly installed at the output end of the signal receiving control device 37, a driving gear 372 is fixedly installed on the output shaft of the control motor 371, the outer surface of the driving gear 372 is meshed with the outer surface of the driven gear 361, an adjusting support rod 38 is arranged between the adjusting threaded rod 36 and the signal receiving control device 37, and the upper end of the adjusting support rod 38 The adjusting support rod 38 is slidably connected to the outer surface of the leveling rod 35, and the lower end of the adjusting support rod 38 is threadedly connected to the outer surface of the adjusting threaded rod 36. The upper surface of the adjusting support rod 38 contacts the lower surface of the printing base plate 34. The distance measurement reflection point 341 on the surface of the printing base plate 34 corresponds to the position of the laser distance measuring device 251. The laser distance measuring device 251 generates laser rays to measure the distance between the four corners of the printing base plate 34 and the moving beam 24. After the difference is obtained, the signal is transmitted to the signal receiving control device 37 through the signal conversion transmission device 252. The signal receiving control device 37 controls the control motor 371 to drive the driving gear 372 to rotate. The driving gear 372 drives the adjusting threaded rod 36 to rotate through the driven gear 361. The leveling rod 35 plays a role of limiting. The adjusting support rod 38 moves up and down under the cooperation of the adjusting threaded rod 36 and the leveling rod 35 to adjust the height of the four corners of the printing base plate 34, so that the height distance between the four sides of the printing base plate 34 and the moving beam 24 is equal and kept level.

[0028] like Figure 1-6 As shown, based on Example 1, the present invention provides a method for using a 3D printing device that can be accurately leveled, comprising the following steps: Step 1: Connect the power base 11 to the power supply, install the consumables and input the model value; Step 2: Leveling the printing base plate 34; Step 3, moving the crossbeam 24, driving the moving assembly 26, and driving the moving component 32 to move and promote the melting of the consumables and the printing assembly 27 to melt the consumables and print the model; Step 4: After printing is completed, open the printing dustproof box 12 to cool the model and shovel the model out of the printing base plate 34.

[0029] The working principle of the 3D printing device capable of precise leveling and its use method will be described in detail below.

[0030] like Figure 1-6 As shown, first, the motor 22 drives the threaded rod 23 to rotate so that the movable beam 24 moves up and down under the limit cooperation of the limit support frame 21, and cooperates to drive the movable component 26 to move left and right on the movable beam 24 to melt the consumables and print the component 27 to facilitate printing the model. Then, the laser distance measuring device 251 generates laser rays to measure the distance between the four corners of the printing base plate 34 and the movable beam 24. After obtaining the difference, the signal is transmitted to the signal receiving control device 37 through the signal conversion transmission device 252. The signal receiving control device 37 controls the control motor 371 to drive the main The movable gear 372 rotates, and the active gear 372 drives the adjusting threaded rod 36 to rotate through the driven gear 361. The leveling rod 35 plays a role of limiting. The adjusting support rod 38 moves up and down in cooperation with the adjusting threaded rod 36 and the leveling rod 35 to adjust the height of the four corners of the printing base plate 34 so that the height distance between the four sides of the printing base plate 34 and the moving beam 24 is equal and kept level. Finally, the driving moving component 32 cooperates with the moving guide rail 33 so that the position of the printing base plate 34 can be adjusted, and the consumables melting printing component 27 can be more efficiently cooperated to operate to print the model.

[0031] The above generally describes the present invention in detail, but it is obvious to a person skilled in the art that some modifications or improvements can be made to the present invention. Therefore, modifications or improvements that do not depart from the spirit of the present invention are within the scope of protection of the present invention.

Claims

1. A 3D printing device capable of precise leveling, comprising a 3D printing device body (1), a power base (11) being fixedly mounted at the bottom of the 3D printing device body (1), an input device and a drive control device being fixedly mounted inside the power base (11), a printing dustproof box (12) being fixedly mounted above the power base (11), and a 3D printing consumables mounting card slot being fixedly mounted on the top of the printing dustproof box (12), characterized in that: A drive printing mechanism (2) is arranged above the power base (11), and a precision leveling base mechanism (3) is arranged in the middle portion below the drive printing mechanism (2); The driving printing mechanism (2) comprises a beam driving movable unit and a printing driving movable unit, the beam driving movable unit being arranged in the middle of the interior of the printing dustproof box (12), and the printing driving movable unit being arranged in the middle of the beam driving movable unit; The precise leveling base mechanism (3) comprises a mobile base unit and a control leveling unit; the mobile base unit is arranged above the power base (11); and the control leveling unit is arranged above the mobile base unit.

2. A 3D printing device capable of precise leveling according to claim 1, characterized in that: The beam driving moving unit comprises a limit support frame (21) fixedly mounted on the middle of both sides of the upper surface of the power base (11), a motor (22) fixedly mounted on one side of the top of the limit support frame (21), a threaded rod (23) fixedly mounted on the output shaft of the motor (22), and the lower end of the threaded rod (23) is rotatably connected to the bottom of the limit support frame (21).

3. The 3D printing device capable of precise leveling according to claim 2, characterized in that: The beam-driven mobile unit further comprises a mobile beam (24) slidably mounted on the outside of the limit support frame (21); an inner wall of one side of the mobile beam (24) is threadedly connected to the outer surface of the threaded rod (23); and a pulley adapted to the limit groove of the limit support frame (21) is movably mounted on the inner side of the mobile beam (24).

4. The 3D printing device capable of precise leveling according to claim 3, characterized in that: The crossbeam driving moving unit further comprises a side distance support rod (25) fixedly mounted on the side surface of the moving crossbeam (24); a laser distance measuring device (251) is fixedly mounted on the front end of the side distance support rod (25); a signal conversion transmission device (252) is fixedly mounted on the rear end of the side distance support rod (25); and the laser distance measuring device (251) and the signal conversion transmission device (252) are connected via an electrical signal.

5. The 3D printing device capable of precise leveling according to claim 1, characterized in that: The printing drive movable unit comprises a driving movable assembly (26) slidably mounted above a movable crossbeam (24), and a consumable material melting printing assembly (27) is fixedly mounted at the front end of the driving movable assembly (26).

6. The 3D printing device capable of precise leveling according to claim 1, characterized in that: The mobile base unit comprises a mobile base (31) arranged on the upper surface of a power base (11); a driving mobile component (32) is fixedly installed inside the mobile base (31); mobile guide rails (33) adapted to the moving wheels of the driving mobile component (32) are fixedly installed on both sides of the upper surface of the power base (11); a printing base plate (34) is arranged above the mobile base (31); and a distance measuring reflection point (341) corresponding to the position of a laser distance measuring device (251) is arranged on the upper surface of the printing base plate (34).

7. The 3D printing device capable of precise leveling according to claim 6, characterized in that: The movable base unit also includes a support base (39) fixedly mounted in the middle of the inner surface of the movable base (31); a spherical support shaft sleeve (391) is fixedly mounted on the upper surface of the support base (39); a spherical support shaft (392) is rotatably mounted on the inner surface of the spherical support shaft sleeve (391); the upper end of the spherical support shaft (392) is fixedly connected to the middle of the lower surface of the printing base plate (34); and a buffer spring is sleeved on the outer surfaces of the spherical support shaft sleeve (391) and the spherical support shaft (392).

8. The 3D printing device capable of precise leveling according to claim 1, characterized in that: The control leveling unit comprises a leveling rod (35) fixedly mounted on the upper surface of the movable base (31) at four sides, the outer surface of the leveling rod (35) being slidably connected to the four sides of the printing base (34), and the control leveling unit comprises an adjusting threaded rod (36) symmetrically rotatably mounted on the four sides of the inner surface of the movable base (31).

9. The 3D printing device capable of precise leveling according to claim 8, characterized in that: A driven gear (361) is fixedly mounted on the bottom of the adjusting threaded rod (36); a signal receiving control device (37) is arranged on one side of the adjusting threaded rod (36); an access end of the signal receiving control device (37) is electrically connected to an output end of the signal conversion transmission device (252); a control motor (371) is fixedly mounted on the output end of the signal receiving control device (37); a driving gear (372) is fixedly mounted on the output shaft of the control motor (371); an outer surface of the driving gear (372) is meshed with an outer surface of the driven gear (361); an adjusting support rod (38) is arranged between the adjusting threaded rod (36) and the signal receiving control device (37); an upper end of the adjusting support rod (38) is slidably connected to an outer surface of the leveling rod (35); a lower end of the adjusting support rod (38) is threadedly connected to an outer surface of the adjusting threaded rod (36); and an upper surface of the adjusting support rod (38) is in contact with a lower surface of the printing base plate (34).

10. According to the 3D printing device capable of precise leveling according to any one of claims 1 to 9, a method for using the 3D printing device capable of precise leveling is provided, characterized in that: The following steps are involved: Step 1: Connect the power base (11) to the power supply, install the consumables and input the model values; Step 2: Leveling the printing base plate (34); Step 3, moving the crossbeam (24), driving the moving assembly (26), and driving the moving part (32) to move and promote the melting of the consumables and the printing assembly (27) to melt and spray the consumables to print the model; Step 4: After printing is completed, open the printing dustproof box (12) to cool the model and shovel the model off the printing base plate (34).

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