Automatic printing platform with multi-feedback control system for 3D printer

Abstract

The invention discloses an automatic printing platform with a multi-feedback control system for a 3D printer, and relates to the technical field of 3D printing, the automatic printing platform comprises a central structural member, component side plates are fixedly connected to the two sides of the central structural member, decorative baffles are installed on the component side plates, an integrated motor roll shaft assembly is installed between one ends of the two component side plates, and the integrated motor roll shaft assembly is fixedly connected with the central structural member. An integrated rear roller shaft mechanism is installed between the other ends of the two component side plates, and a sheet type conveying belt is installed between the integrated rear roller shaft mechanism and the integrated motor roller shaft assembly. According to the 3D printer, the hardware structure is more compact, the module integration degree is higher, the number of used parts is small, the weight of the whole product is reduced, and the load on the z axis of the 3D printer can be reduced. And the production efficiency can be greatly improved and the production cost can be reduced by adopting a pre-assembly mode.

Description

Technical Field

[0001] The invention relates to the technical field of 3D printing, in particular to an automatic printing platform of a 3D printer with a multi-feedback control system. Background Art

[0002] 3D printing is a type of rapid prototyping technology. It is a method of manufacturing three-dimensional objects by printing layer by layer based on digital model files using special wax or plastic materials.

[0003] At present, most 3D printers do not have the function of automatic continuous printing. There are two fundamental reasons for this. The first is that the flatbed printing plate needs to be manually removed after each print, resulting in low work efficiency and high dependence on manual labor. The second is the lack of automatic leveling function or insufficient accuracy. The leveling accuracy of the equipment is related to whether the printing is successful. In the early days, printers often lacked leveling sensors in hardware functions, which required manual debugging of the equipment, which was time-consuming and labor-intensive.

[0004] To address the above problems, we provide an automatic printing platform for a 3D printer with a multi-feedback control system. Summary of the invention

[0005] The purpose of the present invention is to provide an automatic printing platform of a 3D printer with a multi-feedback control system. The printing platform has the function of an automation enhancement module, a parallelism detection function between the platform and the printing extruder, a platform heating function, and a platform temperature detection function; a belt platform print cleaning function, which greatly improves the printing success rate and time utilization rate, reduces the manual operation burden, realizes the refurbishment of old machines, and improves the utilization rate of resources.

[0006] To achieve the above object, the present invention provides the following technical solutions:

[0007] An automatic printing platform of a 3D printer with a multi-feedback control system, comprising a central structural member, both sides of the central structural member are fixedly connected with member side panels, the member side panels are installed with decorative baffles, an integrated motor roller assembly is installed between one ends of the two member side panels, an integrated rear roller mechanism is installed between the other ends of the two member side panels, a sheet conveyor belt is installed between the integrated rear roller mechanism and the integrated motor roller assembly, a main control housing is provided on one side of the decorative baffle, a main control circuit board is provided in the main control housing, a position sensor and a USB firmware upgrade interface are further provided at the lower end of the main control housing, a rear support member is fixedly connected between one ends of the two decorative baffles, and a cleaning shrapnel is installed in the middle of the rear support member;

[0008] The central structural member is also provided with a pressure detection component for detecting the pressure on the sheet conveyor belt.

[0009] As a further solution of the present invention: the integrated motor roller assembly includes a roller shell, a motor mounting cavity is opened at one end of the roller shell, a reduction motor is installed in the motor mounting cavity, a guide shaft is installed at the other end of the roller shell, a first connecting component for connecting to a side plate of a one side component is provided on the guide shaft, and a second connecting component for connecting to a side plate of another side component is installed on the output end of the reduction motor.

[0010] As a further solution of the present invention: a plurality of sheet grooves are provided on the surface of the roller shell, and roller magnetic attraction sheets are provided in each of the sheet grooves.

[0011] As a further solution of the present invention: the first connecting component includes a right-side roller mounting seat, the right-side roller mounting seat is installed on a side plate of the component on one side, the guide shaft is installed in a bearing in the right-side roller mounting seat, and a conductive contact plate with a sensor is provided on the side of the right-side roller mounting seat close to the roller housing, and a conductive ejector plate that cooperates with the conductive contact plate with the sensor is provided on the roller housing.

[0012] As a further solution of the present invention: the second connecting component includes a motor mounting plate, the motor mounting plate is installed on the reduction motor, a roller mounting plate is fixedly connected to the motor mounting plate, the output end of the reduction motor is passed through the hole of the roller mounting plate, a fixed plastic part is installed on the roller mounting plate, and the fixed plastic part is fixedly connected to the corresponding component side plate.

[0013] As a further solution of the present invention: the integrated rear roller shaft mechanism includes a rear axle, the middle and both ends of the rear axle are equipped with shaft connecting parts, the two ends of the rear axle are provided with rear roller shafts, the two ends of the rear roller shaft are equipped with roller shaft bearings, and the inner ring of the roller shaft bearing is fixedly connected to the rear axle.

[0014] As a further solution of the present invention: the pressure detection assembly includes a pressure sensor, which is installed at both ends of one side of the central structural member and in the middle of the other side, the pressure sensor is provided with connecting through holes, an aluminum-based heating plate is provided above the central structural member, the shaft connecting members are fixedly connected to the aluminum-based heating plate, mounting holes are provided at positions of the aluminum-based heating plate opposite to the connecting through holes, square cap bolts are installed between the mounting holes and the connecting through holes, an adjusting spring is passed through the square cap bolts at a position between the aluminum-based heating plate and the pressure sensor, and a soft magnetic sheet is installed on the upper end surface of the aluminum-based heating plate.

[0015] As a further solution of the present invention: a magnetic strip is installed on the central structural member below the two pressure sensors.

[0016] As a further solution of the present invention: the decorative baffle and the rear support member are fixedly connected with mounting ears on the side away from the sheet conveyor belt, and a plurality of mounting holes are opened on the mounting ears.

[0017] As a further solution of the present invention: the mounting hole is a stepped hole, the upper end of the stepped hole is matched with the square nut of the square cap bolt, and the lower end of the stepped hole is matched with the square cap bolt stud.

[0018] Compared with the prior art, the present invention has the following beneficial effects:

[0019] 1. The present invention has a more compact hardware structure, a higher degree of module integration, fewer parts, and a lighter weight of the entire product, which can reduce the load on the z-axis of the 3D printer. The use of pre-assembly can greatly improve production efficiency and reduce production costs.

[0020] 2. The software system of the present invention is also more compact and closed-loop. The product uses more sensors to detect its operating status. The system is more intelligent and adapts more safety mechanisms to more operating scenarios, reducing the occurrence of faults.

[0021] 3. The present invention expands the adaptability of 3D printers with three Z axes, improves the intelligence of more compatible 3D printers, and realizes the hardware foundation of automatic demoulding and queue printing of 3D printers. It improves the time utilization rate of desktop 3D printers, reduces the burden of manual operation, simplifies the operation of users, and promotes market development. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] Figure 1 It is a structural schematic diagram of the present invention.

[0023] Figure 2 It is a bottom perspective schematic diagram of the present invention.

[0024] Figure 3 It is a schematic diagram of the structure of the sheet conveyor belt when it is disassembled in the present invention.

[0025] Figure 4 It is a schematic diagram of the local split structure in the present invention.

[0026] Figure 5 It is a schematic diagram of the structure when the decorative baffle in the present invention is disassembled.

[0027] Figure 6 It is a structural schematic diagram of the detection component in the present invention.

[0028] Figure 7 It is a schematic diagram of the structure of the pressure sensor in the present invention.

[0029] Figure 8It is a schematic structural diagram of the integrated rear roller mechanism in the present invention.

[0030] Fig. 9 It is a schematic diagram of the structure of the integrated motor roller assembly in the present invention.

[0031] Fig.10 It is a schematic diagram of the structure of the magnetic attraction of the roller in the present invention.

[0032] Fig.11 It is a schematic diagram of the partial cross-sectional structure of the roller housing in the present invention.

[0033] Among them: 1. Decorative baffle; 2. Sheet conveyor belt; 3. Main control housing; 4. Cleaning shrapnel; 5. Rear support; 6. Integrated rear roller mechanism; 7. Integrated motor roller assembly; 8. Soft magnetic sheet; 9. Mounting hole; 10. Square cap bolt; 11. Aluminum-based heating plate; 12. Central structural member; 13. Component side plate; 14. Adjustment spring; 15. Pressure sensor; 16. Connection perforation; 17. Position sensor; 19. USB firmware upgrade interface; 20. Magnetic strip; 21. Main control circuit board; 22. Mounting ear;

[0034] 601, shaft connection; 602, rear roller shaft; 603, roller shaft bearing; 604, rear shaft;

[0035] 701, reduction motor; 702, motor mounting cavity; 703, sheet slot; 704, roller housing; 705, roller magnetic sheet; 706, guide shaft; 707, conductive contact plate with sensor; 708, right roller mounting seat; 709, motor mounting plate; 710, fixed plastic part; 711, roller mounting plate; 712, conductive ejector plate. DETAILED DESCRIPTION

[0036] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0037] See also Figure 1-Figure 11In an embodiment of the present invention, an automatic printing platform of a 3D printer with a multi-feedback control system includes a central structural member 12, both sides of the central structural member 12 are fixedly connected with component side panels 13, and the component side panels 13 are installed with decorative baffles 1, an integrated motor roller assembly 7 is installed between one end of the two component side panels 13, an integrated rear roller mechanism 6 is installed between the other ends of the two component side panels 13, and a sheet conveyor 2 is installed between the integrated rear roller mechanism 6 and the integrated motor roller assembly 7, and the sheet conveyor 2 is composed of a spring steel sheet sprayed with PEI powder and a Teflon base belt. In addition, the process is optimized, and a ring-shaped closed Teflon base belt is used, so that it can withstand a larger load tension without cracking.

[0038] A main control shell 3 is provided on one side of the decorative baffle 1, and a main control circuit board 21 is provided in the main control shell 3. A position sensor 17 and a USB firmware upgrade interface 19 are also provided at the lower end of the main control shell 3. A rear support member 5 is fixedly connected between one end of the two decorative baffles 1, and a cleaning shrapnel 4 is installed in the middle of the rear support member 5. A pressure detection component for detecting the pressure on the sheet conveyor belt 2 is also provided on the central structural member 12; the central structural member 12 is a sheet metal member formed by bending and welding a stainless steel plate. The pressure after contact between the platform and the 3D printer extruder head can be detected by the pressure detection component, and the pressure is collected and fed back through the wire and the connected 3D printer system, so that the printer system can build a plane height difference model, and then calibrate the Z-axis height when printing at various positions on the platform, that is, the 3D printer hot bed leveling.

[0039] The integrated motor roller assembly 7 includes a roller housing 704, one end of which is provided with a motor installation cavity 702, a reduction motor 701 is installed in the motor installation cavity 702, and the other end of the roller housing 704 is provided with a guide shaft 706, the guide shaft 706 is provided with a first connecting component for connecting with a side plate 13 of a one-side component, and the output end of the reduction motor 701 is provided with a second connecting component for connecting with a side plate 13 of another side component; the surface of the roller housing 704 is provided with a A plurality of sheet slots 703, each of which is provided with a roller magnetic sheet 705; the first connecting component includes a right roller mounting seat 708, the right roller mounting seat 708 is mounted on a component side plate 13 on one side, the guide shaft 706 is mounted in a bearing in the right roller mounting seat 708, a conductive contact plate 707 with a sensor is provided on the side of the right roller mounting seat 708 close to the roller housing 704, and a conductive ejector plate that cooperates with the conductive contact plate 707 with a sensor is provided on the roller housing 704 712; the second connection component includes a motor mounting plate 709, the motor mounting plate 709 is mounted on the reduction motor 701, the motor mounting plate 709 is fixedly connected with a roller mounting plate 711, the output end of the reduction motor 701 is inserted into the hole of the roller mounting plate 711, and a fixed plastic part 710 is installed on the roller mounting plate 711, and the fixed plastic part 710 is fixedly connected to the corresponding component side plate 13, and the main control circuit board 21 controls the roller housing 704 of the built-in reduction motor 701 to rotate, and the conductive The conductive slip ring composed of the ejector plate 712 and the conductive contact plate 707 with a sensor supplies power to the reduction motor 701 at 360 degrees. The roller magnetic sheet 705 on the roller housing 704 absorbs and drives the displacement of the sheet conveyor belt 2, thereby displacing the printed parts on the conveyor belt. When the sheet conveyor belt 2 is in motion, the sensor on the conductive contact plate 707 with a sensor detects the angle change of the roller housing 704, and accurately controls the flatness of the upper surface when the conveyor belt stops, thereby providing higher plane accuracy for the next printing.

[0040] The integrated rear roller mechanism 6 includes a rear shaft 604, and shaft connectors 601 are installed in the middle and at both ends of the rear shaft 604. Rear roller shafts 602 are provided at both ends of the rear shaft 604. Roller bearings 603 are installed at both ends of the rear roller shaft 602, and the inner ring of the roller bearing 603 is fixedly connected to the rear shaft 604. The surface shape of the integrated rear roller mechanism 6 is compatible with the sheet conveyor belt 2, and can cooperate with the integrated motor roller assembly 7 to achieve smooth driving of the sheet conveyor belt 2.

[0041] The pressure detection assembly includes a pressure sensor 15, which is installed at both ends of one side of the central structure 12 and in the middle of the other side. The pressure sensor 15 is provided with a connecting through hole 16. An aluminum-based heating plate 11 is provided above the central structure 12. The shaft connecting member 601 is fixedly connected to the aluminum-based heating plate 11. The aluminum-based heating plate 11 is provided with a mounting hole 9 at a position opposite to the connecting through hole 16. A square cap bolt 10 is installed between the mounting hole 9 and the connecting through hole 16. The square cap bolt 10 is located between the aluminum-based heating plate 11 and the pressure sensor 1 5, an adjusting spring 14 is inserted into the position between the aluminum-based heating plate 11, a soft magnetic sheet 8 is installed on the upper end surface of the aluminum-based heating plate 11; a magnetic strip 20 is installed at the position below the two pressure sensors 15 of the central structural member 12; the mounting hole 9 is a stepped hole, the upper end of the stepped hole is adapted to the square nut of the square cap bolt 10, and the lower end of the stepped hole is adapted to the stud of the square cap bolt 10; during installation, the pressure sensor 15 is fastened to the central structural member with screws, and then the magnetic strip embedded with the magnet is installed to the bottom of the central structural member by screws, which protects the pressure sensor 15 and lifts the sheet conveyor belt 2.

[0042] The decorative baffle 1 and the rear support member 5 are fixedly connected to the side away from the sheet conveyor belt 2 with a mounting ear 22, and a plurality of mounting holes are opened on the mounting ear 22; when installed on a 3D printer with a 3Z axis configuration, the three mounting ears 22 on the left, right and rear sides of the platform are aligned with the installation positions of the three Z axes of the printer, and tightened with screws, and the lead wires are connected to the corresponding interfaces of the 3D printer main control board for use.

[0043] The working principle of the present invention is: the pressure after the contact between the platform and the 3D printer extruder head can be detected by the pressure sensor 15, and the pressure is collected and fed back through the wire and the connected 3D printer system, so that the printer system can build a plane height difference model, and then calibrate the Z-axis height when printing at various positions on the platform, that is, the 3D printer hot bed leveling.

[0044] During automatic cleaning, the main control circuit board 21 needs to be configured and paired with the corresponding printer through the USB firmware upgrade interface 19. When the printer completes the printing job, the z-axis needs to be controlled to descend to drive the platform to descend. When it descends to a certain position, the position sensor 17 built into the main control circuit board 21 is triggered, and the command receiving channel is opened to wait for the "cleaning" command output from the 3D printer through the wire. After receiving the command, the main control circuit board 21 will control the roller housing 704 of the built-in reduction motor 701 to rotate, and the conductive ejector plate 712 and the sensor are connected to the main control circuit board 21. The conductive slip ring formed by the conductive contact plate 707 supplies power to the reduction motor 701 360°. The roller magnetic sheet 705 on the roller housing 704 absorbs and drives the displacement of the sheet conveyor belt 2, thereby displacing the printed parts on the conveyor belt to the edge of the roller housing 704, where they are subjected to strong pulling force and automatically separated to complete the cleaning of the platform. During the movement, the sensor on the conductive contact plate 707 with a sensor detects the angle change of the roller housing 704, accurately controls the flatness of the upper surface when the conveyor belt stops, and provides higher plane accuracy for the next printing.

[0045] When performing manual cleaning and manual positioning functions: When the automatic cleaning is not done, or when the equipment has a motion failure such as a jam and needs manual cleaning or conveyor belt position reset, you can toggle the manual-automatic switch on the main control circuit board 21. When switching from automatic to manual, the main control circuit board 21 will automatically trigger the reset operation. At this time, the roller housing 704 will run for one circle and be detected by the conductive contact plate 707 with a sensor, and finally compared with the factory setting data. The position calibration of the motor installation cavity 702 is completed and reset is achieved; when the above operations are completed, the command receiving channel will be opened to wait for the "cleaning" command output from the 3D printer through the wire. At this time, the user can issue the command through the printer system to let the platform run the "cleaning" function.

[0046] When the conveyor belt needs to be replaced, the decorative baffle 1 installed on the left side of the central structural member 12 must be removed first, then the main control housing 3 must be removed, the wires connected to the 3D printer must be disconnected, and then the rear support member 5 must be removed. Finally, the sheet conveyor belt 2 must be pulled out from the left side, and then a new one must be inserted for reset and installation. The sheet conveyor belt 2 has been optimized in design, and the base belt (spring steel sheet attached connecting belt) used has a closed-loop production structure, which greatly enhances its tensile strength and solves the problem of the sheet conveyor belt cracking during cleaning operations when the printed parts are too firmly adhered.

[0047] It is obvious to those skilled in the art that the present invention is not limited to the details of the above exemplary embodiments, and that the present invention can be implemented in other specific forms without departing from the spirit or basic features of the present invention. Although this specification is described in accordance with the implementation modes, not every implementation mode includes only one technical solution. This description of the specification is only for the sake of clarity. Those skilled in the art should regard the specification as a whole. The technical solutions in each embodiment can also be appropriately combined to form other implementation modes that can be understood by those skilled in the art.

Claims

1. An automatic printing platform of a 3D printer with a multi-feedback control system, comprising a central structure (12), characterized in that: Both sides of the central structural member (12) are fixedly connected to component side panels (13), and decorative baffles (1) are installed on the component side panels (13). An integrated motor roller assembly (7) is installed between one ends of the two component side panels (13), and an integrated rear roller mechanism (6) is installed between the other ends of the two component side panels (13). A sheet conveyor belt (2) is installed between the integrated rear roller mechanism (6) and the integrated motor roller assembly (7). A main control housing (3) is provided on one side of the decorative baffle (1), and a main control circuit board (21) is provided in the main control housing (3). A position sensor (17) and a USB firmware upgrade interface (19) are also provided at the lower end of the main control housing (3). A rear support member (5) is fixedly connected between one ends of the two decorative baffles (1), and a cleaning spring (4) is installed in the middle of the rear support member (5); The central structural member (12) is also provided with a pressure detection component for detecting the pressure on the sheet conveyor belt (2).

2. The automatic printing platform of a 3D printer with a multi-feedback control system according to claim 1, characterized in that: The integrated motor roller assembly (7) comprises a roller housing (704), one end of the roller housing (704) is provided with a motor installation cavity (702), a reduction motor (701) is installed in the motor installation cavity (702), the other end of the roller housing (704) is provided with a guide shaft (706), the guide shaft (706) is provided with a first connection component for connecting to a side plate (13) of a one-side component, and the output end of the reduction motor (701) is provided with a second connection component for connecting to a side plate (13) of another-side component.

3. The automatic printing platform of a 3D printer with a multi-feedback control system according to claim 2, characterized in that: The surface of the roller housing (704) is provided with a plurality of sheet grooves (703), and each sheet groove (703) is provided with a roller magnetic attraction sheet (705).

4. The automatic printing platform of a 3D printer with a multi-feedback control system according to claim 2, characterized in that: The first connecting component comprises a right roller mounting seat (708), wherein the right roller mounting seat (708) is mounted on a component side plate (13) on one side, and the guide shaft (706) is mounted in a bearing in the right roller mounting seat (708). A conductive contact plate (707) with a sensor is provided on a side of the right roller mounting seat (708) close to the roller housing (704), and a conductive ejector plate (712) is provided on the roller housing (704) to cooperate with the conductive contact plate (707) with the sensor.

5. According to the automatic printing platform of a 3D printer with a multi-feedback control system as described in claim 2, the second connecting component includes a motor mounting plate (709), the motor mounting plate (709) is installed on the reduction motor (701), a roller mounting plate (711) is fixedly connected to the motor mounting plate (709), the output end of the reduction motor (701) is passed through the hole of the roller mounting plate (711), and a fixed plastic part (710) is installed on the roller mounting plate (711), and the fixed plastic part (710) is fixedly connected to the corresponding component side plate (13).

6. The automatic printing platform of a 3D printer with a multi-feedback control system according to claim 1, characterized in that: The integrated rear roller shaft mechanism (6) comprises a rear shaft (604), wherein shaft connectors (601) are installed in the middle and at both ends of the rear shaft (604), rear roller shafts (602) are provided at both ends of the rear shaft (604), roller shaft bearings (603) are installed at both ends of the rear roller shaft (602), and the inner ring of the roller shaft bearing (603) is fixedly connected to the rear shaft (604).

7. The automatic printing platform of a 3D printer with a multi-feedback control system according to claim 6, characterized in that: The pressure detection assembly comprises a pressure sensor (15), the pressure sensor (15) being mounted at both ends of one side of a central structural member (12) and at the middle of the other side, the pressure sensor (15) being provided with a connecting through hole (16), an aluminum-based heating plate (11) being provided above the central structural member (12), the shaft connecting member (601) being fixedly connected to the aluminum-based heating plate (11), a mounting hole (9) being provided at a position of the aluminum-based heating plate (11) opposite to the connecting through hole (16), a square cap bolt (10) being installed between the mounting hole (9) and the connecting through hole (16), an adjusting spring (14) being inserted through the square cap bolt (10) located between the aluminum-based heating plate (11) and the pressure sensor (15), and a soft magnetic sheet (8) being installed on the upper end surface of the aluminum-based heating plate (11).

8. The automatic printing platform of a 3D printer with a multi-feedback control system according to claim 7, characterized in that: A magnetic attraction strip (20) is installed on the central structural member (12) at a position below the two pressure sensors (15).

9. The automatic printing platform of a 3D printer with a multi-feedback control system according to claim 1, characterized in that: The decorative baffle (1) and the rear support member (5) are both fixedly connected to a mounting ear (22) on the side away from the sheet-type conveyor belt (2), and a plurality of mounting holes are provided on the mounting ear (22).

10. The automatic printing platform of a 3D printer with a multi-feedback control system according to claim 8, characterized in that: The mounting hole (9) is a stepped hole, the upper end of the stepped hole is matched with the square nut of the square cap bolt (10), and the lower end of the stepped hole is matched with the stud of the square cap bolt (10).

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