A 3D printer working platform flip device

Abstract

The present invention discloses a device for turning over a working platform of a 3D printer, which relates to the technical field of 3D printing and aims to solve the technical problem that the current 3D printer adopts a horizontal layer-by-layer printing method, which wastes a large amount of high-performance materials while increasing the complexity and cost of part printing, and also requires leveling the working platform. The device comprises a plurality of lifting modules, a plurality of beams distributed between the plurality of lifting modules for fixing the lifting modules, a control panel fixed at the bottom of one side of the beam, and a wire feeder fixed at the top of one side of the beam for supplying printing wire. A mold support mechanism is commonly installed at the bottom of the plurality of lifting modules. The present invention adopts a six-axis printing mode to realize unsupported model printing, and can adjust the printing posture of the model base around the offset direction of the printing path, thereby reducing the difference in mechanical properties between structures of parts in different axial directions due to the influence of gravity, and reducing material waste and cost.

Description

Technical Field

[0001] The present invention relates to the technical field of 3D printing, and more specifically to a device for turning over a working platform of a 3D printer. Background Art

[0002] 3D printing, also known as additive manufacturing or layered manufacturing, is a technology that uses digital model files as the basis and uses powdered metal, plastic and other bonded materials to construct objects by printing layer by layer. 3D printing is often used to manufacture models in the fields of mold manufacturing, industrial design, etc., and is later gradually used for the direct manufacturing of some products. It has a profound impact on traditional process flows, production lines, factory models, and industrial chain combinations, and is a representative disruptive technology in the manufacturing industry.

[0003] At present, in industrial applications, the traditional 3D printing method of printing layer by layer in the horizontal direction will cause large differences in the mechanical properties of parts in different axial directions due to the influence of gravity. In order to reduce the mechanical differences between the structures in different axial directions of the parts, a large number of support structures are needed when drawing the model to support the parts in different axial directions on the parts to ensure that the printed parts can overcome gravity and complete the construction;

[0004] Therefore, after the 3D printer in the prior art completes the layer-by-layer printing of the parts, the support structure needs to be removed and the traces left after the removal need to be polished, which wastes a lot of high-performance materials and increases the complexity and cost of part printing. In addition, in the horizontal layer-by-layer printing method, the working platform needs to be leveled during the printing preparation stage to avoid printing failure. In view of this, we propose a device for turning the working platform of a 3D printer. Summary of the invention

[0005] The purpose of the present invention is to provide a device for turning over the working platform of a 3D printer, so as to solve the technical problem that the current 3D printer adopts the method of printing layer by layer in the horizontal direction, which wastes a large amount of high-performance materials while increasing the complexity and cost of part printing, and also requires leveling the working platform.

[0006] In order to solve the above technical problems, the present invention provides the following technical solutions: a 3D printer work platform flip device, comprising a plurality of lifting modules, a plurality of beams distributed between the plurality of lifting modules for fixing the lifting modules, a control panel fixed at the bottom of one side of the beam, and a wire feeder fixed at the top of one side of the beam for supplying printing wire;

[0007] A mold support mechanism is commonly installed at the bottom of several lifting modules, and a two-axis plane adjustment mechanism is commonly provided between several lifting modules to realize three-axis motion for printing;

[0008] The ejector mechanism includes a feeding mechanism and a flip axial adjustment mechanism provided on the feeding mechanism for lifting the model body and coordinating the printing state for axial adjustment, and the flip axial adjustment mechanism includes a self-rotation and deflection assembly and a printing platform provided on the self-rotation and deflection assembly for lifting the model body and performing foundation casting positioning;

[0009] The two-axis plane adjustment mechanism includes a two-axis driving mechanism and a working component threadedly mounted on the two-axis driving mechanism to cooperate with the flip axial adjustment mechanism for synchronous displacement printing. The working component has an axial melting printing state and an appearance defect approaching polishing state, and cooperates with the flip axial adjustment mechanism to realize the axial melting printing action and the appearance defect approaching polishing action of the model body.

[0010] The present invention uses four lifting modules and a two-axis driving mechanism to perform three-axis position adjustment on the working component, and then combines the feeding mechanism and the self-rotation and deflection component to perform lateral movement, self-rotation and deflection adjustment on the printing platform provided with the model, so as to adjust the printing posture of the model base around the offset direction of the printing path, so that the previous printing path and the printing path currently in the printing sequence are in the same axial state, and enter the axial deflection printing state of the model to realize unsupported model printing, reduce the difference in mechanical properties between the structures of parts in different axial directions due to the influence of gravity, and ensure that the printed parts can overcome gravity to complete the construction. Due to the use of unsupported axial deflection printing, there is no need to dismantle and polish the supporting structure, which reduces the waste of high-performance materials while reducing the complexity and cost of part printing. There is no need to level the platform body, which solves the problem of printing failure caused by the uneven platform body.

[0011] Preferably, the working component includes a two-axis movable frame, a nozzle is fixedly installed inside the two-axis movable frame, and a cooling fan A is fixedly installed at the bottom end of the back of the two-axis movable frame, a sliding cavity is opened on one side of the two-axis movable frame, and a threaded cavity is constructed on the top of the two-axis movable frame.

[0012] Preferably, a grinding mechanism for cooperating with the flip axial adjustment mechanism to grind the model body is fixedly installed on the side of the bottom end of the two-axis movable frame away from the nozzle, and dust collecting and cooling mechanisms for absorbing heat and dust are detachably installed on both sides of the two-axis movable frame.

[0013] Preferably, the grinding mechanism comprises:

[0014] An articulated seat, the articulated seat being fixed to one side of the bottom end of the two-axis movable frame;

[0015] A steering gear, the steering gear is fixedly mounted on one side of the articulated seat;

[0016] The support arm disposed in the articulated seat is rotated, the driving end of the steering gear extends into the two-axis movable frame and is fixedly connected to the support arm, and a receiving cavity is provided at the end of the support arm;

[0017] A servo motor E is fixedly mounted at the end of the support arm, and one end of the servo motor E extending into the accommodating chamber is fixedly mounted with a grinding wheel, the grinding wheel is arranged in the accommodating chamber, and one side of the accommodating chamber is provided with dust cleaning teeth arranged on the outer edge surface of the grinding wheel.

[0018] Preferably, the dust collecting and cooling mechanism comprises:

[0019] A cooling fan B, wherein a dust collecting bag is fixedly installed at the air outlet end of the cooling fan B;

[0020] A concentrating nozzle is arranged at the air inlet end of the heat dissipation fan B, and the concentrating nozzle is detachably mounted on one side of the two-axis movable frame.

[0021] Preferably, the two-axis driving mechanism comprises:

[0022] Four brackets, the four brackets are respectively fixed on corresponding lifting modules, and the lifting and lowering actions of the brackets are realized through the lifting modules;

[0023] Two feed screws, each of which is rotatably mounted between the two brackets on the same side, and one end of each feed screw is connected to a servo motor A disposed inside the bracket;

[0024] Two movable seats are respectively meshed and installed on the corresponding feed screw rods, a translation screw rod is rotatably installed between the two movable seats, and a servo motor B connected to the translation screw rod is fixedly installed on one side of the movable seat, and the translation screw rod is threadedly installed in the threaded cavity;

[0025] Two translation guide rods, the translation guide rods are fixedly installed between the two brackets arranged opposite to each other;

[0026] Two slide seats are respectively slidably arranged on the corresponding translation guide rods, and a feed guide rod is fixedly installed between the two slide seats, and the feed guide rod is slidably arranged in the sliding cavity.

[0027] Preferably, the printing platform includes a platform body, the top of the platform body is provided with a plurality of arc-shaped casting positioning grooves in a circular array, and a plurality of the arc-shaped casting positioning grooves form a central casting positioning groove at the top of the platform body, a plurality of positioning grooves are equidistantly provided on both sides of the arc-shaped casting positioning groove, and a plurality of the positioning grooves are detachably installed with heat expansion blocks, and two of the heat expansion blocks arranged opposite to each other form a clamping gap for locking the cooling material injected into the concentrated nozzle.

[0028] Preferably, the feeding mechanism comprises:

[0029] A support plate with two guide grooves is provided, guide rails are fixedly installed on both sides of the top of the support plate, and a sliding workbench is slidably arranged on the two guide rails;

[0030] A driving seat and a driven seat are constructed on one side of the bottom end of the sliding workbench, and the driving seat and the driven seat are respectively slidably arranged in the corresponding guide grooves;

[0031] A return spring fixed to one side of the bottom end of the support plate, the other end of the return spring being fixedly connected to the driven seat;

[0032] A linear drive module is fixed at the center of the bottom end of the support plate, and the linear drive module is connected to the drive seat to realize linear drive of the drive seat.

[0033] Preferably, the self-rotation and deflection assembly comprises:

[0034] A support plate fixedly arranged on the top of the sliding workbench, wherein both sides of the top of the support plate are provided with side plates, and the two side plates are rotatably mounted on the shaft;

[0035] A fixing frame fixedly arranged on one side of the side plate, a servo motor C is fixedly mounted on one side of the fixing frame, a worm is fixedly mounted on one end of the motor shaft of the servo motor C, and a worm wheel meshing with the worm is fixedly mounted on one end of the shaft;

[0036] Two side seats are respectively fixedly mounted on the corresponding shaft rods, the bottom ends of the two side seats are commonly mounted with a bottom plate, and a concave cavity is opened at the top center of the bottom plate;

[0037] A servo motor D is fixedly arranged on one side of the bottom end of the base plate, a circular shaft is rotatably installed at the center of the bottom end of the concave cavity, and the top end of the circular shaft is fixedly connected to the platform body, a reduction gear is fixedly installed on the outer edge surface of the circular shaft, and a motor shaft of the servo motor D extends into the concave cavity and is fixedly installed at one end with a driving gear meshing with the reduction gear.

[0038] A method for using a reversible device comprises the following steps:

[0039] S1. Placement of printing wire;

[0040] Install the wire reel with the printed wire on the wire feeder, and insert one end of the printed wire into the nozzle for later use;

[0041] S2, model import;

[0042] The model data is transmitted to the control panel through the network or data cable. After the model is imported, the model can be printed.

[0043] S3, foundation pouring positioning;

[0044] The printing wire is melted and extruded onto the surface of the platform body through the nozzle. According to the positioning needs established when the model is drawn and the area below the model, a number of lifting modules and two-axis driving mechanisms are used to help the working component move its position, and the feeding mechanism is used to help the printing platform adjust its position, so that the molten material is continuously squeezed into a number of arc-shaped casting positioning grooves, and the molten material is focused on being dotted into the clamping gaps in the arc-shaped casting positioning grooves. When the heat expansion blocks on both sides of the clamping gaps are heated, they expand and extrude the molten material into the arc-shaped casting positioning grooves. When the materials in the arc-shaped casting positioning grooves are solidified, the heat expansion blocks are gradually cooled and restored, and the solidified molten materials are pulled by both sides to form a locking, so that a model positioning point array can be formed;

[0045] S4, axial deflection printing;

[0046] The working components are driven to perform three-axis adjustment through a number of lifting modules and two-axis driving mechanisms, so as to adjust the position of the nozzle on the X, Y, and Z axes, so as to melt the wire through the nozzle and extrude it to the top of the platform body, and gradually connect the model positioning point array to form a model foundation. When the model printing path is expanded or concave and deviates from the axial direction of the previous printing path, the printing platform is moved horizontally, rotated, and deflected by the feeding mechanism in conjunction with the self-rotation and deflection component, and the printing posture of the model foundation is adjusted around the offset direction of the printing path, so that the previous printing path and the printing path in the printing sequence are in the same axial state, and the axial deflection printing state of the model is entered to realize unsupported model printing;

[0047] S5, the molten material is cooled rapidly;

[0048] When the nozzle melts the wire and extrude it onto the model base, the nozzle will be cooled by the cooling fan A located behind the two-axis moving frame, and then the air will be sucked on both sides by two dust collection and cooling mechanisms to form a rapid cooling of the molten material extruded onto the model, so as to increase its curing speed and improve the printing efficiency;

[0049] S6. Defect treatment after the model is cooled;

[0050] After the printed model is completely cooled and solidified, the moving path of the working components of several lifting modules and two-axis drive mechanisms will be planned in combination with the model data, and the support arm will be driven to rotate in the hinge seat by the servo gear, so that the end of the support arm equipped with the grinding wheel is moved to the bottom of the nozzle, so that the servo motor E drives the grinding wheel to grind the defects on the surface of the model. During the grinding process, the servo motor E is driven by several lifting modules and two-axis drive mechanisms to adjust the position, and then the feeding mechanism cooperates with the self-rotation and deflection assembly to move, rotate and deflect the printing platform with the model horizontally, so as to cooperate with the servo motor E to complete the grinding of the model surface and enter the appearance defect approaching grinding state;

[0051] S7. Clean the dust when polishing the model;

[0052] When the grinding wheel moves to the bottom of the nozzle to grind the model, the model is positioned by the cast model positioning point array to maintain a high connection strength with the platform body. The dust generated during the grinding process is collected by two dust collecting and cooling mechanisms, and the dust attached to the surface of the grinding wheel is cleaned by the dust cleaning teeth. During collection, the two heat dissipation fans B suck the air mixed with dust into the dust collecting bag through the concentrating nozzle, and the dust is collected by filtering the dust collecting bag, thereby realizing the clean operation of model printing;

[0053] S8, an array of model positioning points of the model base;

[0054] After the polishing is completed, the model can be pried off the platform body by using tools, and the model positioning point array at the bottom of the model can be pulled out from the clamping gap to separate the model from the platform body. The bottom of the model can be trimmed and polished by tools to complete the 3D printing of the model.

[0055] Compared with the prior art, the present invention has the following beneficial effects:

[0056] 1. The present invention uses four lifting modules and a two-axis driving mechanism to perform three-axis position adjustment on the working component, and then combines the feeding mechanism and the self-rotation and deflection component to perform lateral movement, self-rotation and deflection adjustment on the printing platform provided with the model, so as to adjust the printing posture of the model base around the offset direction of the printing path, so that the previous printing path and the printing path currently in the printing sequence are in the same axial state, and enter the axial deflection printing state of the model to realize unsupported model printing, reduce the difference in mechanical properties between the structures of parts in different axial directions due to the influence of gravity, and ensure that the printed parts can overcome gravity to complete the construction. Due to the use of unsupported axial deflection printing, there is no need to dismantle and polish the support structure, which reduces the waste of high-performance materials while reducing the complexity and cost of part printing. There is no need to level the platform body, which solves the problem of printing failure caused by the uneven platform body.

[0057] 2. The present invention also plans the grinding path through the model data, and drives the support arm to rotate in the hinge seat through the servo gear, so as to move one end of the support arm equipped with the grinding wheel to the bottom of the nozzle, so as to drive the grinding wheel to grind the defects on the surface of the model through the servo motor E. During the grinding process, the servo motor E is driven by four lifting modules and two-axis driving mechanisms to adjust the position, and then the feeding mechanism cooperates with the self-rotation and deflection assembly to perform transverse movement, self-rotation and deflection adjustment on the printing platform provided with the model, so as to cooperate with the servo motor E to complete the grinding of the model surface, save the manpower and time required for grinding the appearance defects of the model, and further reduce the cost of parts processing.

[0058] 3. The present invention also achieves heat dissipation of the nozzle by means of a heat dissipation fan A disposed on a two-axis movable frame, and cooperates with two dust collecting and cooling mechanisms to cool the molten material extruded from the nozzle, so as to accelerate its solidification speed and improve the efficiency of model processing.

[0059] 4. The present invention also collects the dust generated by the servo motor E during printing through two dust collecting and cooling mechanisms. During collection, two heat dissipation fans B suck the air mixed with dust into the dust collecting bag through the concentrated nozzle, and the dust is collected through the filtration of the dust collecting bag, thereby realizing the clean operation of model printing.

[0060] 5. The present invention also realizes the casting foundation positioning of the model through the printing platform. Before the model is printed, the printing wire is melted and extruded onto the surface of the platform body through the nozzle. According to the positioning needs established when the model is drawn and the area below the model, the molten material is continuously squeezed into a number of arc-shaped casting positioning grooves, and the molten material is focused on being dotted into the clamping gaps in the arc-shaped casting positioning grooves. When the heat expansion blocks on both sides of the clamping gaps are heated, they expand and extrude the molten material into the arc-shaped casting positioning grooves. After the materials in the arc-shaped casting positioning grooves are solidified, the heat expansion blocks are gradually cooled and restored, and the solidified molten materials are locked by pulling the two sides, so that a model positioning point array can be formed, which greatly improves the connection strength between the model and the platform body to adapt to the axial melting printing action and the appearance defect approaching polishing action of the model. BRIEF DESCRIPTION OF THE DRAWINGS

[0061] Figure 1 It is a schematic diagram of the overall structure of the present invention;

[0062] Figure 2 It is a structural schematic diagram of the ejector mechanism in the present invention;

[0063] Figure 3 It is a schematic structural diagram of the ejector mechanism in the present invention when viewed from above;

[0064] Figure 4 It is a schematic diagram of the structure of the flip axial adjustment mechanism in the present invention in a top view;

[0065] Figure 5 It is a schematic diagram of the internal structure of the flip axial adjustment mechanism in the present invention in a disassembled state;

[0066] Figure 6 It is a structural schematic diagram of the printing platform in the present invention;

[0067] Figure 7 It is a structural schematic diagram of the two-axis plane adjustment mechanism in the present invention;

[0068] Figure 8 It is a front structural schematic diagram of the working component of the present invention when it is in a melting printing state;

[0069] Fig. 9 It is a schematic diagram of the back structure of the working component of the present invention when it is in the appearance polishing state;

[0070] Fig.10 It is a structural schematic diagram of the grinding mechanism in the present invention;

[0071] Fig.11 It is a schematic diagram of the internal structure of the dust collecting and cooling mechanism in the present invention in a cross-sectional state;

[0072] Fig.12It is a schematic diagram of the use state of the present invention in the state of axial melting printing of the model;

[0073] Fig.13 It is a schematic diagram of the use state of the present invention when the model appearance defect is close to the polishing state.

[0074] Description of the numbers in the figure:

[0075] 1. Lifting module; 2. Crossbeam; 3. Control panel;

[0076] 4. Ejector mechanism; 401. Support plate; 402. Guide rail; 403. Sliding table; 404. Driving seat; 405. Follower seat; 406. Return spring; 407. Linear drive module;

[0077] 5. Two-axis plane adjustment mechanism; 501. Bracket; 502. Feed screw; 503. Servo motor A; 504. Moving seat; 505. Servo motor B; 506. Translation screw; 507. Translation guide rod; 508. Sliding seat; 509. Feed guide rod;

[0078] 6. Wire release device; 7. Working assembly; 701. Two-axis moving frame; 702. Nozzle; 703. Cooling fan A; 704. Sliding cavity; 705. Thread cavity;

[0079] 8. Flip axial adjustment mechanism; 801. Support plate; 802. Shaft rod; 803. Side seat; 804. Bottom plate; 805. Servo motor C; 806. Worm; 807. Worm wheel; 808. Servo motor D; 809. Reduction gear; 810. Driving gear;

[0080] 9. Grinding mechanism; 901. Articulated seat; 902. Servo; 903. Support arm; 904. Servo motor E; 905. Grinding wheel; 906. Dust cleaning tooth;

[0081] 10. Dust collection and cooling mechanism; 1001. Cooling fan B; 1002. Concentrating nozzle; 1003. Dust collection bag;

[0082] 11. Printing platform; 1101. Platform body; 1102. Arc casting positioning groove; 1103. Center casting positioning groove; 1104. Heat expansion block; 12. Model body; 13. Printing wire. DETAILED DESCRIPTION

[0083] like Figure 1 , Fig.12As shown, the present invention relates to a 3D printer work platform flip device, comprising a plurality of lifting modules 1, a plurality of beams 2 distributed between the plurality of lifting modules 1 for fixing the lifting modules 1, a control panel 3 fixed at the bottom of one side of the beam 2, and a wire feeder 6 fixed at the top of one side of the beam 2 for supplying a printing wire 13;

[0084] like Figure 1 , Figure 2 , Fig.12 As shown, in an embodiment of the present invention, a mold support mechanism 4 is commonly installed at the bottom of several lifting modules 1, and a two-axis plane adjustment mechanism 5 is commonly provided between the several lifting modules 1 to realize the three-axis movement action for printing. The mold support mechanism 4 includes a feeding mechanism and a flip axial adjustment mechanism 8 provided on the feeding mechanism for lifting the model main body 12 and coordinating the axial adjustment of the printing state. The feeding mechanism cooperates with the flip axial adjustment mechanism 8 to support and adjust the posture of the model, and then combines the two-axis plane adjustment mechanism 5 to perform three-axis movement to complete the printing of the model.

[0085] like Figure 2 , Figure 3 As shown, in an embodiment of the present invention, the feeding mechanism includes:

[0086] A support plate 401 with two guide grooves is provided, guide rails 402 are fixedly installed on both sides of the top of the support plate 401, and a sliding workbench 403 is slidably arranged on the two guide rails 402;

[0087] A driving seat 404 and a driven seat 405 are constructed on one side of the bottom end of the sliding workbench 403, and the driving seat 404 and the driven seat 405 are respectively slidably disposed in corresponding guide grooves;

[0088] A return spring 406 is fixed to one side of the bottom end of the support plate 401, and the other end of the return spring 406 is fixedly connected to the driven seat 405;

[0089] A linear drive module 407 is fixed at the bottom center of the support plate 401, and the linear drive module 407 is connected to the drive seat 404 to realize linear driving of the drive seat 404. The linear drive module 407 drives the drive seat 404 and the driven seat 405 arranged at the bottom of the sliding workbench 403 to slide in the corresponding guide grooves respectively, thereby pushing the sliding workbench 403 to perform linear displacement with the help of the two guide rails 402. During displacement, the return spring 406 is extended by pulling the return spring 406 through the return spring 406. During reset, the return spring 406 will pull the drive seat 404 and the driven seat 405 arranged at the bottom of the sliding workbench 403 to slide in the corresponding guide grooves respectively, thereby completing the reset of the sliding workbench 403, thereby realizing the feed adjustment of the model.

[0090] like Figure 2 , Figure 4 , Figure 5 , Figure 6 , Figure 7 , Fig.12 As shown, in an embodiment of the present invention, the flip axial adjustment mechanism 8 includes a self-rotation and deflection assembly and a printing platform 11 provided on the self-rotation and deflection assembly for lifting the model body 12 and performing foundation casting and positioning. The self-rotation and deflection assembly includes:

[0091] A support plate 801 is fixedly mounted on the top of the sliding workbench 403, and side plates are constructed on both sides of the top of the support plate 801, and the two side plates are rotatably mounted on the shaft 802;

[0092] A fixing frame is fixedly arranged on one side of the side plate, a servo motor C805 is fixedly installed on one side of the fixing frame, a worm 806 is fixedly installed on one end of the motor shaft of the servo motor C805, and a worm wheel 807 meshing with the worm 806 is fixedly installed on one end of the shaft 802;

[0093] Two side seats 803 are respectively fixedly mounted on the corresponding shaft rods 802, and a bottom plate 804 is commonly mounted on the bottom ends of the two side seats 803, and a concave cavity is opened at the top center of the bottom plate 804;

[0094] The servo motor D808 is fixedly arranged on one side of the bottom end of the bottom plate 804, and a circular shaft is installed in the center rotation of the bottom end of the concave cavity, and the top end of the circular shaft is fixedly connected to the platform body 1101, and a reduction gear 809 is fixedly installed on the outer edge surface of the circular shaft, and the motor shaft of the servo motor D808 extends to one end of the concave cavity and a driving gear 810 meshing with the reduction gear 809 is fixedly installed. When the model posture needs to be adjusted to ensure that the previous printing path and the printing path in the printing sequence are in the same axial state, the servo motor C805 can be used to drive the worm 806 to rotate, so as to cooperate with the worm wheel 807 at one end of the shaft rod 802 to drive the two shaft rods 802. The bottom plate 804 with two side seats 803 rotates, thereby driving the bottom plate 804 with two shafts 802 as the axis to adjust the inclination angle, so as to realize the axial runout adjustment of the platform body 1101. In addition, in the process of axial runout adjustment, in order to compensate for the different inclination angles required at various places after the model foundation is fixed, the driving gear 810 will be driven to rotate by the servo motor D808, so as to drive the circular shaft with the reduction gear 809 to rotate, and then drive the platform body 1101 arranged on the circular shaft to rotate. Therefore, the self-rotation adjustment of the platform body 1101 is coordinated with the axial runout adjustment to ensure that the previous printing path of the model and the printing path in the printing sequence are in the same axial state.

[0095] like Figure 4 , Figure 5 , Figure 6 , Figure 7 , Figure 8 , Fig.12As shown, in an embodiment of the present invention, the printing platform 11 includes a platform body 1101, and a plurality of arc-shaped casting positioning grooves 1102 are provided in a circular array at the top of the platform body 1101, and a plurality of arc-shaped casting positioning grooves 1102 form a central casting positioning groove 1103 at the top of the platform body 1101, and a plurality of positioning grooves are provided at equal distances on both sides of the arc-shaped casting positioning groove 1102, and a plurality of positioning grooves are detachably installed with heat expansion blocks 1104, and two heat expansion blocks 1104 arranged opposite to each other form a clamping gap for locking the cooling material injected into the concentrated nozzle 1002. Before the model is printed, the printing wire 13 is melted and extruded onto the surface of the platform body 1101 through the nozzle 702, and the melted wire 13 is extruded onto the surface of the platform body 1101 according to the positioning needs established when the model is drawn and in combination with the area below the model. The material is continuously squeezed into a number of arc-shaped casting positioning grooves 1102, and the molten material is focused on being dotted into the clamping gaps in the arc-shaped casting positioning grooves 1102. When the heat expansion blocks 1104 on both sides of the clamping gaps are heated, they expand and extrude the molten material into the arc-shaped casting positioning grooves 1102. When the material in the arc-shaped casting positioning grooves 1102 is solidified, the heat expansion blocks 1104 are gradually cooled and restored, and the solidified molten material is locked by pulling on both sides to form a model positioning point array, which greatly improves the connection strength between the model and the platform body 1101 to adapt to the axial melting printing action and the appearance defect approaching polishing action of the model. The heat expansion blocks 1104 are made of low heat-resistant plastics, and one or more of arc, square, triangle, positive direction, diamond, and semicircle can be selected.

[0096] like Figure 1 , Figure 2 , Figure 4 , Figure 6 , Figure 7 , Figure 8 , Fig.12 As shown, in the embodiment of the present invention, the two-axis plane adjustment mechanism 5 includes a two-axis driving mechanism and a working component 7 threadedly mounted on the two-axis driving mechanism to cooperate with the flip axial adjustment mechanism 8 for synchronous displacement printing. The working component 7 has an axial melting printing state and an appearance defect approaching polishing state, and cooperates with the flip axial adjustment mechanism 8 to realize the axial melting printing action and the appearance defect approaching polishing action of the model body 12. The two-axis driving mechanism includes:

[0097] Four brackets 501, the four brackets 501 are respectively fixed on the corresponding lifting modules 1, and the lifting action of the brackets 501 is realized by the lifting modules 1;

[0098] Two feed screw rods 502, the feed screw rods 502 are rotatably mounted between two brackets 501 located on the same side, and one end of the feed screw rod 502 is connected to a servo motor A503 arranged on the inner side of the bracket 501;

[0099] Two movable seats 504 are respectively meshed and installed on the corresponding feed screw rods 502, a translation screw rod 506 is rotatably installed between the two movable seats 504, and a servo motor B505 connected to the translation screw rod 506 is fixedly installed on one side of the movable seat 504, and the translation screw rod 506 is threadedly installed in the threaded cavity 705;

[0100] Two translation guide rods 507, the translation guide rods 507 are fixedly installed between two brackets 501 arranged opposite to each other;

[0101] Two slides 508, the two slides 508 are slidably disposed on the corresponding translation guide rods 507, and a feed guide rod 509 is fixedly installed between the two slides 508, and the feed guide rod 509 is slidably disposed in the sliding cavity 704;

[0102] When the working component 7 needs to be displaced in the X-axis, two servo motors A503 are used to drive two feed screws 502 to rotate respectively, so as to drive two moving seats 504 to drive the translation screw 506 provided with the working component 7 to move along the X-axis. During the movement, the feed guide rod 509 provided between the two slide seats 508 is used to support and guide it, and cooperates with the translation screw 506 to form an X-shaped staggered support structure with good load-bearing performance, thereby realizing the X-axis displacement of the working component 7.

[0103] When the working component 7 needs to move along the Y axis, the servo motor B505 drives the translation screw 506 to rotate to push the working component 7 to move along the Y axis. During the movement, the working component 7 drives the slides 508 provided at both ends of the translation guide rod 507 to slide on the two translation guide rods 507 respectively, so as to support and guide the working component 7, thereby achieving the Y axis displacement of the working component 7.

[0104] When the working component 7 needs to be displaced in the Z axis, the four lifting modules 1 drive the four brackets 501 to be lifted and lowered. During the lifting process, the two feed screws 502 and the two translation guide rods 507 cooperate with the translation screws 506 and the feed guide rods 509 arranged in a staggered manner to support the working component 7, which has high support strength and strong practicality.

[0105] Among them, the three-axis position adjustment of the working component 7 is carried out through four lifting modules 1 and a two-axis driving mechanism, and then the printing platform 11 provided with the model is adjusted in lateral movement, rotation and deflection in combination with the feeding mechanism and the self-rotation and deflection component, so as to adjust the printing posture of the model base around the offset direction of the printing path, so that the previous printing path and the printing path currently in the printing sequence are in the same axial state, and the axial deflection printing state of the model is entered to realize unsupported model printing, reduce the difference in mechanical properties between the structures of parts in different axial directions due to the influence of gravity, and ensure that the printed parts can overcome gravity to complete the construction. Due to the use of unsupported axial deflection printing, there is no need to remove and polish the support structure, which reduces the waste of high-performance materials while reducing the complexity and cost of part printing. There is no need to level the platform body 1101, which solves the problem of printing failure caused by the uneven platform body 1101.

[0106] like Figure 6 , Figure 7 , Figure 8 , Fig. 9 , Fig.12 As shown, in the embodiment of the present invention, the working component 7 includes a two-axis moving frame 701, a nozzle 702 is fixedly installed in the two-axis moving frame 701, and a cooling fan A703 is fixedly installed at the bottom end of the back of the two-axis moving frame 701, a sliding cavity 704 is opened on one side of the two-axis moving frame 701, and a threaded cavity 705 is constructed on the top of the two-axis moving frame 701, and a bottom end of the two-axis moving frame 701 away from the nozzle 702 is fixedly installed with a side for cooperating with the flip axial adjustment mechanism 8 to grind the model body 12 The grinding mechanism 9 is provided, and the dust collecting and cooling mechanism 10 for absorbing heat and dust is detachably installed on both sides of the two-axis movable frame 701. The printing wire 13 set on the wire releaser 6 is inserted into the nozzle 702, so that the printing wire 13 is melted and extruded through the nozzle 702, so that the model is printed layer by layer on the surface of the platform body 1101. During the printing process, the nozzle 702 is cooled by the cooling fan A703 to avoid the problem of overheating and reducing the service life of the nozzle 702.

[0107] like Figure 1 , Figure 2 , Figure 4 , Figure 7 , Figure 8 , Fig. 9 , Fig.10 , Fig.13 As shown, in an embodiment of the present invention, the grinding mechanism 9 includes:

[0108] An articulated seat 901, the articulated seat 901 is fixed to one side of the bottom end of the two-axis movable frame 701;

[0109] A steering gear 902, which is fixedly mounted on one side of the articulated seat 901;

[0110] The support arm 903 disposed in the articulated seat 901 is rotated, and the driving end of the steering gear 902 extends into the two-axis movable frame 701 and is fixedly connected to the support arm 903, and a receiving cavity is opened at the end of the support arm 903;

[0111] Servo motor E904, servo motor E904 is fixedly installed at the end of support arm 903, and servo motor E904 extends to one end of the accommodating cavity and is fixedly installed with a grinding wheel 905, the grinding wheel 905 is arranged in the accommodating cavity, and one side of the accommodating cavity is provided with a dust cleaning tooth 906 arranged on the outer edge surface of the grinding wheel 905. After the printing of the model is completed, wait for it to be completely cooled and solidified, and then the grinding path can be planned according to the model data, and the servo engine 902 drives the support arm 903 to rotate in the articulated seat 901, so as to move the end of the support arm 903 equipped with the grinding wheel 905 to the nozzle 702, thereby entering the appearance defect approaching grinding state, and the grinding wheel 905 is driven by the servo motor E904 to grind the defects on the model surface. During the grinding process, the servo motor E904 is driven by the four lifting modules 1 and the two-axis driving mechanism to adjust the position, and then the feeding mechanism cooperates with the self-rotation and deflection component to perform transverse movement, self-rotation and deflection adjustment on the printing platform 11 with the model, so as to cooperate with the servo motor E904 to complete the grinding of the model surface, save the manpower and time required for grinding the model appearance defects, and further reduce the cost of parts processing.

[0112] like Figure 8 , Fig. 9 , Fig.11 As shown, in an embodiment of the present invention, the dust collecting and cooling mechanism 10 includes:

[0113] A cooling fan B1001, a dust collecting bag 1003 is fixedly installed at the air outlet end of the cooling fan B1001;

[0114] The concentrating nozzle 1002 is arranged at the air inlet end of the heat dissipation fan B1001, and the concentrating nozzle 1002 is detachably installed on one side of the two-axis movable frame 701. Through the suction of air by two dust collecting and cooling mechanisms 10, the molten material extruded by the nozzle 702 can be cooled during printing to accelerate its solidification speed and improve the efficiency of model processing. When in the polishing state, the air mixed with dust is sucked into the dust collecting bag 1003 through the concentrating nozzle 1002 through the two heat dissipation fans B1001, and the dust is collected through the filtration of the dust collecting bag 1003 to achieve the clean operation of model printing.

[0115] like Figure 1 , Figure 2 , Figure 4 , Figure 6 , Figure 8 , Fig. 9 , Fig.10 , Fig.11 , Fig.12 , Fig.13 As shown, as another embodiment of the present invention, a method for using a reversible device comprises the following steps:

[0116] S1, placement of printing wire 13;

[0117] The wire reel wound with the printing wire 13 is mounted on the wire unwinder 6, and one end of the printing wire 13 is inserted into the nozzle 702 for standby use;

[0118] S2, model import;

[0119] The model data is transmitted to the control panel 3 via the network or data cable. After the model is imported, the model can be printed.

[0120] S3, foundation pouring positioning;

[0121] The printing wire 13 is melted and extruded onto the surface of the platform body 1101 through the nozzle 702. According to the positioning needs established when the model is drawn and the area below the model, the working component 7 is helped to move its position through a number of lifting modules 1 and a two-axis driving mechanism, and the printing platform 11 is helped to adjust its position in cooperation with the feeding mechanism, so that the molten material is continuously squeezed into a number of arc-shaped casting positioning grooves 1102, and the molten material is focused on being dotted into the clamping gaps in the arc-shaped casting positioning grooves 1102. When the heat expansion blocks 1104 on both sides of the clamping gap are heated, they expand and extrude the molten material into the arc-shaped casting positioning grooves 1102. When the materials in the arc-shaped casting positioning grooves 1102 are solidified, the heat expansion blocks 1104 are gradually cooled and restored, and the solidified molten material is pulled by both sides to form a locking, so that a model positioning point array can be formed;

[0122] S4, axial deflection printing;

[0123] The working assembly 7 is driven by a plurality of lifting modules 1 and a two-axis driving mechanism to perform three-axis adjustment, so as to adjust the position of the nozzle 702 on the X, Y, and Z axes, so as to melt the wire through the nozzle 702 and extrude it to the top of the platform body 1101, and gradually connect the model positioning point array to form a model foundation. When the model printing path is expanded outward, concave, etc. and deviates from the axial direction of the previous printing path, the printing platform 11 is moved horizontally, rotated, and deflected by the feeding mechanism in cooperation with the self-rotation and deflection assembly, and the printing posture of the model foundation is adjusted around the offset direction of the printing path, so that the previous printing path and the printing path in the printing sequence are in the same axial state, and the axial deflection printing state of the model is entered to realize unsupported model printing;

[0124] S5, the molten material is cooled rapidly;

[0125] When the nozzle 702 melts the wire and extrude it onto the model base, the heat dissipation fan A703 located behind the two-axis moving frame 701 will dissipate heat for the nozzle 702, and then two dust collecting and cooling mechanisms 10 will suck air on both sides to form a rapid cooling of the molten material extruded onto the model, so as to increase its solidification speed and improve the printing efficiency;

[0126] S6, defect treatment after the model is cooled;

[0127] After the printed model is completely cooled and solidified, the moving path of the working component 7 is planned by several lifting modules 1 and two-axis driving mechanisms in combination with the model data, and the support arm 903 is driven to rotate in the hinge seat 901 by the servo gear 902, so that the end of the support arm 903 equipped with the grinding wheel 905 is moved to the bottom of the nozzle 702, so that the grinding wheel 905 is driven by the servo motor E904 to grind the defects on the surface of the model. During the grinding process, the servo motor E904 is driven by several lifting modules 1 and two-axis driving mechanisms to adjust the position, and then the printing platform 11 with the model is moved horizontally, rotated and swayed by the feeding mechanism in cooperation with the self-rotation and sway assembly, so as to cooperate with the servo motor E904 to complete the grinding of the model surface and enter the appearance defect approaching grinding state;

[0128] S7. Clean the dust when polishing the model;

[0129] When the model is polished by the grinding wheel 905 moved to the bottom of the nozzle 702, the model is positioned by the cast model positioning point array so that it maintains a high connection strength with the platform body 1101. The dust generated during the polishing process is collected by two dust collecting and cooling mechanisms 10, and the dust attached to the surface of the grinding wheel 905 is cleaned by the dust cleaning teeth 906. During the collection, the two heat dissipation fans B1001 suck the air mixed with dust into the dust collecting bag 1003 through the concentrating nozzle 1002, and the dust is collected by filtering the dust collecting bag 1003, thereby realizing the clean operation of model printing;

[0130] S8, an array of model positioning points of the model base;

[0131] After polishing, the model can be pried off the platform body 1101 by using tools, and the model positioning point array at the bottom of the model can be pulled out from the clamping gap to separate the model from the platform body 1101. The bottom of the model can be trimmed and polished by tools to complete the 3D printing operation of the model.

[0132] The embodiments of the present invention disclose preferred embodiments, but are not limited thereto. A person skilled in the art can easily understand the spirit of the present invention based on the above embodiments and make different extensions and changes. However, as long as they do not deviate from the spirit of the present invention, they are all within the protection scope of the present invention.

Claims

1. A 3D printer work platform reversible device, characterized in that: It comprises a plurality of lifting modules (1), a plurality of cross beams (2) distributed between the plurality of lifting modules (1) and used to fix the lifting modules (1), a control panel (3) fixed at the bottom of one side of the cross beam (2), and a wire feeder (6) fixed at the top of one side of the cross beam (2) and used to supply printing wire (13); A mold support mechanism (4) is commonly installed at the bottom of the plurality of lifting modules (1), and a two-axis plane adjustment mechanism (5) is commonly provided between the plurality of lifting modules (1) to realize a three-axis motion action for printing; The mold support mechanism (4) comprises a feeding mechanism and a flip axial adjustment mechanism (8) arranged on the feeding mechanism for lifting the model body (12) and performing axial adjustment in coordination with the printing state; the flip axial adjustment mechanism (8) comprises a self-rotation and deflection assembly and a printing platform (11) arranged on the self-rotation and deflection assembly for lifting the model body (12) and performing foundation pouring and positioning; The two-axis plane adjustment mechanism (5) comprises a two-axis driving mechanism and a working component (7) threadedly mounted on the two-axis driving mechanism and cooperating with the flip axial adjustment mechanism (8) for synchronous displacement printing. The working component (7) has an axial melting printing state and an appearance defect approaching polishing state, and cooperates with the flip axial adjustment mechanism (8) to realize the axial melting printing action and the appearance defect approaching polishing action of the model body (12); The working assembly (7) comprises a two-axis movable frame (701), a nozzle (702) is fixedly installed in the two-axis movable frame (701), and a heat dissipation fan A (703) is fixedly installed at the bottom end of the back of the two-axis movable frame (701), a sliding cavity (704) is opened on one side of the two-axis movable frame (701), and a threaded cavity (705) is constructed on the top of the two-axis movable frame (701); A grinding mechanism (9) for cooperating with the flip axial adjustment mechanism (8) to grind the model body (12) is fixedly installed on the side of the bottom end of the two-axis movable frame (701) away from the nozzle (702), and dust collecting and cooling mechanisms (10) for absorbing heat and dust are detachably installed on both sides of the two-axis movable frame (701); The dust collecting and cooling mechanism (10) comprises: A heat dissipation fan B (1001), wherein a dust collecting bag (1003) is fixedly mounted on the air outlet end of the heat dissipation fan B (1001); A concentrating nozzle (1002), the concentrating nozzle (1002) being arranged at the air inlet end of the heat dissipation fan B (1001), and the concentrating nozzle (1002) being detachably mounted on one side of the two-axis movable frame (701); The printing platform (11) comprises a platform body (1101), the top of the platform body (1101) is provided with a plurality of arc-shaped casting positioning grooves (1102) in a circular array, and a plurality of the arc-shaped casting positioning grooves (1102) form a central casting positioning groove (1103) at the top of the platform body (1101), a plurality of positioning grooves are equidistantly provided on both sides of the arc-shaped casting positioning groove (1102), and a heat expansion block (1104) is detachably installed in each of the plurality of positioning grooves, and two heat expansion blocks (1104) arranged opposite to each other form a clamping gap for locking the cooling material injected into the concentrated nozzle (1002).

2. A 3D printer work platform flip device according to claim 1, characterized in that: The grinding mechanism (9) comprises: An articulated seat (901), wherein the articulated seat (901) is fixed to one side of the bottom end of the two-axis movable frame (701); A steering gear (902), wherein the steering gear (902) is fixedly mounted on one side of the hinge seat (901); The support arm (903) disposed in the hinge seat (901) is rotated, and the driving end of the steering gear (902) extends into the two-axis movable frame (701) and is fixedly connected to the support arm (903), and a receiving cavity is provided at the end of the support arm (903); A servo motor E (904), the servo motor E (904) is fixedly mounted on the end of the support arm (903), and the servo motor E (904) extends to one end of the accommodating chamber and is fixedly mounted with a grinding wheel (905), the grinding wheel (905) is arranged in the accommodating chamber, and one side of the accommodating chamber is provided with dust cleaning teeth (906) arranged on the outer edge surface of the grinding wheel (905).

3. A 3D printer work platform flip device according to claim 2, characterized in that: The two-axis driving mechanism comprises: Four brackets (501), wherein the four brackets (501) are respectively fixed on corresponding lifting modules (1), and the lifting module (1) is used to realize the lifting action of the brackets (501); Two feed screw rods (502), the feed screw rods (502) are rotatably mounted between the two brackets (501) located on the same side, and one end of the feed screw rod (502) is connected to a servo motor A (503) arranged on the inner side of the bracket (501); Two movable seats (504) are respectively meshed and mounted on the corresponding feed screw rods (502), a translation screw rod (506) is rotatably mounted between the two movable seats (504), and a servo motor B (505) connected to the translation screw rod (506) is fixedly mounted on one side of the movable seat (504), and the translation screw rod (506) is threadedly mounted in the threaded cavity (705); Two translation guide rods (507), wherein the translation guide rods (507) are fixedly installed between two brackets (501) arranged opposite to each other; Two slide seats (508), the two slide seats (508) are respectively slidably arranged on the corresponding translation guide rods (507), and a feed guide rod (509) is fixedly installed between the two slide seats (508), and the feed guide rod (509) is slidably arranged in the sliding cavity (704).

4. The 3D printer work platform flip device according to claim 3, characterized in that: The feeding mechanism comprises: A support plate (401) is provided with two guide grooves, guide rails (402) are fixedly installed on both sides of the top of the support plate (401), and sliding workbenches (403) are slidably arranged on the two guide rails (402); A driving seat (404) and a driven seat (405) are constructed on one side of the bottom end of the sliding workbench (403), and the driving seat (404) and the driven seat (405) are respectively slidably disposed in the corresponding guide grooves; A return spring (406) fixed to one side of the bottom end of the support plate (401), the other end of the return spring (406) being fixedly connected to the driven seat (405); A linear drive module (407) is fixed at the center of the bottom end of the support plate (401), and the linear drive module (407) is connected to the drive seat (404) to achieve linear drive of the drive seat (404).

5. The 3D printer work platform flip device according to claim 4, characterized in that: The self-rotation and deflection assembly comprises: A support plate (801) fixedly mounted on the top of the sliding workbench (403), wherein both sides of the top of the support plate (801) are provided with side plates, and the two side plates are rotatably mounted on the shaft (802); A fixing frame fixedly arranged on one side of the side plate, a servo motor C (805) is fixedly mounted on one side of the fixing frame, a worm (806) is fixedly mounted on one end of the motor shaft of the servo motor C (805), and a worm wheel (807) meshing with the worm (806) is fixedly mounted on one end of the shaft (802); Two side seats (803) are respectively fixedly mounted on the corresponding shaft rods (802), a bottom plate (804) is commonly mounted on the bottom ends of the two side seats (803), and a concave cavity is opened at the top center of the bottom plate (804); A servo motor D (808) is fixedly mounted on one side of the bottom end of the base plate (804), a circular shaft is rotatably mounted at the center of the bottom end of the concave cavity, and the top end of the circular shaft is fixedly connected to the platform body (1101), a reduction gear (809) is fixedly mounted on the outer edge surface of the circular shaft, and a motor shaft of the servo motor D (808) extends into the concave cavity and is fixedly mounted at one end with a driving gear (810) meshing with the reduction gear (809).

6. A method for using a reversible device, applied to a reversible device for a 3D printer work platform according to any one of claims 1 to 5, characterized in that: The following steps are involved: S1, placement of printing wire (13); The wire reel wound with the printing wire (13) is mounted on the wire unwinder (6), and one end of the printing wire (13) is inserted into the nozzle (702) for standby use; S2, model import; The model data is transmitted to the control panel (3) via a network or a data cable. After the model is imported, the model can be printed; S3, foundation pouring positioning; The printing wire (13) is melted and extruded onto the surface of the platform body (1101) through the nozzle (702). According to the positioning requirements established when the model is drawn and the area below the model, the working component (7) is helped to move its position through a plurality of lifting modules (1) and a two-axis driving mechanism, and the printing platform (11) is helped to adjust its position in coordination with the feeding mechanism, so that the molten material is continuously squeezed into a plurality of arc-shaped casting positioning grooves (1102), and the molten material is focused on being dotted into the clamping gaps in the plurality of arc-shaped casting positioning grooves (1102). When the heat expansion blocks (1104) on both sides of the clamping gap are heated, they expand and extrude the molten material into the arc-shaped casting positioning grooves (1102). When the materials in the plurality of arc-shaped casting positioning grooves (1102) are solidified, the heat expansion blocks (1104) are gradually cooled and restored, and the solidified molten material is pulled by both sides to form a locking, thereby forming a model positioning point array. S4, axial deflection printing; The working assembly (7) is driven to perform three-axis adjustment through a plurality of lifting modules (1) and a two-axis driving mechanism, thereby adjusting the position of the nozzle (702) on the X, Y, and Z axes, so that the wire is melted and extruded to the top of the platform body (1101) through the nozzle (702), and the model positioning point array is gradually connected to form a model base. When the model printing path is expanded outward, concave, etc. and deviates from the axial direction of the previous printing path, the printing platform (11) is moved horizontally, rotated, and deflected by the feeding mechanism in conjunction with the self-rotation and deflection assembly, and the printing posture of the model base is adjusted around the offset direction of the printing path, so that the previous printing path and the printing path in the printing sequence are in the same axial state, and the axial deflection printing state of the model is entered to realize unsupported model printing; S5, the molten material is cooled rapidly; After the nozzle (702) melts the wire and extrude it onto the model base, the nozzle (702) is cooled by a heat dissipation fan A (703) located behind the two-axis movable frame (701), and then air is sucked on both sides by two dust collecting and cooling mechanisms (10) to form a rapid cooling of the molten material extruded onto the model, thereby increasing its solidification speed and improving printing efficiency; S6. Defect treatment after the model is cooled; After the printed model is completely cooled and solidified, the moving path of the working component (7) is planned by combining the model data with a plurality of lifting modules (1) and a two-axis driving mechanism, and the support arm (903) is driven to rotate in the hinge seat (901) by the steering gear (902), so that one end of the support arm (903) equipped with a grinding wheel (905) is moved to the bottom of the nozzle (702), so that the servo motor E (904) drives the grinding wheel (905) to grind the defects on the surface of the model. During the grinding process, the servo motor E (904) is driven by a plurality of lifting modules (1) and a two-axis driving mechanism to adjust the position, and then the printing platform (11) provided with the model is adjusted by the feeding mechanism in cooperation with the self-rotation and deflection assembly to perform transverse movement, self-rotation and deflection adjustment, so as to cooperate with the servo motor E (904) to complete the grinding of the model surface, and enter the appearance defect approaching grinding state; S7. Clean the dust when polishing the model; When the model is polished by the grinding wheel (905) moved below the nozzle (702), the model is positioned by the cast model positioning point array so that it maintains a high connection strength with the platform body (1101). The dust generated during the polishing process is collected by two dust collecting and cooling mechanisms (10), and the dust attached to the surface of the grinding wheel (905) is cleaned by the dust cleaning teeth (906). During the collection, the two heat dissipation fans B (1001) suck the air mixed with dust into the dust collecting bag (1003) through the concentrating nozzle (1002), and the dust is collected by filtering the dust collecting bag (1003), thereby realizing the clean operation of model printing; S8, an array of model positioning points of the model base; After the polishing is completed, the model can be pried off the platform body (1101) by using a tool, and the model positioning point array at the bottom of the model can be pulled out from the clamping gap to separate the model from the platform body (1101). The bottom of the model can be trimmed and polished by using a tool to complete the 3D printing operation of the model.

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