A 3D printing device

Abstract

The present invention discloses a 3D printing device, relating to the field of 3D printing, and used to improve the printing accuracy of 3D printed images. The 3D printing device comprises: a frame; a rotating mechanism disposed on the frame; a first horizontal sliding mechanism disposed on the rotating mechanism; the rotating mechanism is used to drive the first horizontal sliding mechanism to rotate within a horizontal plane; a first vertical sliding mechanism disposed on the first horizontal sliding mechanism; the first horizontal sliding mechanism is used to drive the first vertical sliding mechanism to move horizontally; and a printing carriage disposed on the first vertical sliding mechanism; the first vertical sliding mechanism is used to drive the printing carriage to move up and down.

Description

Technical Field

[0001] The present application discloses a 3D printing device, which relates to the field of 3D printing. Background Art

[0002] 3D printing technology has been widely used in various fields. Existing 3D printing usually performs layered processing based on the digital model of the object to be printed, and then prints layer by layer according to the layered data to form the corresponding physical object.

[0003] Existing 3D printing technology uses a line-by-line printing method to print each layer of a planar graphic. Line-by-line printing uses rectangular coordinates to determine the printing trajectory. When printing arc-length images, the arc length is approximated by printing polygonal graphics. This results in distortion in the printed 3D image and low printing accuracy. Summary of the Invention

[0004] The purpose of this application is to provide a 3D printing device to improve the printing accuracy of 3D printed images.

[0005] In order to achieve the above objectives, this application provides the following technical solutions:

[0006] A 3D printing device, comprising:

[0007] frame;

[0008] A rotating mechanism is provided on the frame;

[0009] A first horizontal sliding mechanism is provided on the rotating mechanism; the rotating mechanism is used to drive the first horizontal sliding mechanism to rotate in a horizontal plane;

[0010] a first vertical sliding mechanism, disposed on the first horizontal sliding mechanism; the first horizontal sliding mechanism is used to drive the first vertical sliding mechanism to move horizontally;

[0011] The printing carriage is arranged on the first vertical sliding mechanism; the first vertical sliding mechanism is used to drive the printing carriage to move up and down.

[0012] A 3D printing device provided by the present application has a rotating mechanism set on a frame, a first horizontal sliding mechanism set on the rotating mechanism, a first vertical sliding mechanism set on the first horizontal sliding mechanism, and then a printing carriage set on the first vertical sliding mechanism. In this way, the rotating mechanism can drive the first horizontal sliding mechanism to rotate in a horizontal plane, the first horizontal sliding mechanism is used to drive the first vertical sliding mechanism to move horizontally, and the first vertical sliding mechanism is used to drive the printing carriage to move up and down. Finally, the printing carriage can realize up and down, left and right and rotational movements under the joint action of the rotating mechanism, the first horizontal sliding mechanism and the first vertical sliding mechanism. In this way, when the printing carriage needs to print an arc length image, it is no longer necessary to approximate the arc length image by printing a polygonal image, but can directly realize rotational printing through the solution in the present application, thereby improving the printing accuracy of the 3D printed image and making the printed image more accurate. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] The drawings described herein are used to provide a further understanding of the present application and constitute a part of the present application. The illustrative embodiments of the present application and their descriptions are used to explain the present application and do not constitute an improper limitation on the present application. In the drawings:

[0014] Figure 1 A schematic diagram of the structure of a 3D printing device provided in an embodiment of the present application;

[0015] Figure 2 A schematic diagram of the structure of a tray provided in an embodiment of the present application;

[0016] Figure 3 A schematic diagram of the structure of a horizontal right-angle detector provided in an embodiment of the present application;

[0017] Figure 4 A schematic diagram of multiple concentric circular printing bands provided in an embodiment of the present application.

[0018] Reference numerals:

[0019] 10-frame; 11-printing carriage; 12-rotating gantry; 13-rotating driven gear; 14-rotating driving gear; 15-first driving component; 16-first horizontal slide rail; 17-first vertical slide rail; 18-tray; 19-second horizontal slide rail; 20-third horizontal slide rail; 21-sanding carriage; 22-fourth horizontal slide rail; 23-second vertical slide rail; 24-vertical rod; 25-horizontal slot. DETAILED DESCRIPTION

[0020] In order to make the technical problems, technical solutions and beneficial effects to be solved by this application more clearly understood, this application is further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain this application and are not intended to limit this application.

[0021] It should be noted that when an element is referred to as being “fixed on” or “disposed on” another element, it may be directly on the other element or indirectly on the other element. When an element is referred to as being “connected to” another element, it may be directly connected to the other element or indirectly connected to the other element.

[0022] In addition, the terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of the technical features indicated. Therefore, a feature defined as "first" or "second" may explicitly or implicitly include one or more of the features. In the description of this application, "multiple" means two or more, unless otherwise clearly and specifically defined. "Several" means one or more, unless otherwise clearly and specifically defined.

[0023] In the description of this application, it should be understood that the terms "up", "down", "front", "back", "left", "right", etc., indicating directions or positional relationships, are based on the directions or positional relationships shown in the accompanying drawings. They are only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific direction, be constructed and operated in a specific direction. Therefore, they should not be understood as limitations on this application.

[0024] In the description of this application, it should be noted that, unless otherwise expressly specified or limited, the terms "installed," "connected," and "connected" should be understood in a broad sense. For example, they can refer to fixed connections, detachable connections, or integral connections; they can refer to mechanical connections or electrical connections; they can refer to direct connections or indirect connections through an intermediate medium; they can refer to internal communication between two components or the interaction between two components. Those skilled in the art will understand the specific meanings of the above terms in this application based on the specific circumstances.

[0025] like Figure 1As shown, an embodiment of the present invention provides a 3D printing device, including a frame 10, a rotating mechanism, a first horizontal sliding mechanism, a first vertical sliding mechanism and a printing carriage 11; wherein, the rotating mechanism is arranged on the frame; the first horizontal sliding mechanism is arranged on the rotating mechanism, and the rotating mechanism is used to drive the first horizontal sliding mechanism to rotate in a horizontal plane; the first vertical sliding mechanism is arranged on the first horizontal sliding mechanism, and the first horizontal sliding mechanism is used to drive the first vertical sliding mechanism to move horizontally; the printing carriage 11 is arranged on the first vertical sliding mechanism, and the first vertical sliding mechanism is used to drive the printing carriage to move up and down.

[0026] Specifically, a nozzle is installed in the printing carriage, and a mixture of glue and ink droplets is stored in the nozzle.

[0027] A 3D printing device provided by an embodiment of the present invention comprises a rotating mechanism disposed on a frame, a first horizontal sliding mechanism disposed on the rotating mechanism, a first vertical sliding mechanism disposed on the first horizontal sliding mechanism, and a printing carriage disposed on the first vertical sliding mechanism. In this way, the rotating mechanism can drive the first horizontal sliding mechanism to rotate in a horizontal plane, the first horizontal sliding mechanism is used to drive the first vertical sliding mechanism to move horizontally, and the first vertical sliding mechanism is used to drive the printing carriage to move up and down. Ultimately, the printing carriage, under the joint action of the rotating mechanism, the first horizontal sliding mechanism, and the first vertical sliding mechanism, can achieve up and down, left and right, and rotational movement, thereby achieving arc printing of the object to be printed, making the printed image more accurate and improving the printing accuracy. In short, the rotating mechanism is disposed in the 3D printing device, which can drive the nozzle in the printing carriage to rotate, eliminates the image distortion caused by the line-by-line printing method, achieves the purpose of printing arc graphics along an arc trajectory, and achieves the effect of improving the accuracy of the printed arc.

[0028] In an exemplary embodiment, as Figure 1 As shown, the rack 10 may be a rectangular parallelepiped rack.

[0029] When the frame is a rectangular frame, when the printing carriage is working, it can provide stable support for the horizontal moving mechanism and the vertical moving mechanism of the printing carriage, reducing the deformation probability of the horizontal moving mechanism and the vertical moving mechanism of the printing carriage, and ultimately making the entire 3D printing device more stable and the range of rotational printing wide.

[0030] In an exemplary embodiment, as Figure 1As shown, the rotating mechanism may include a rotating gantry 12, a rotating bearing, a rotating driven gear 13, a rotating driving gear 14 and a first driving component 15: wherein the rotating gantry 12 is fixedly connected to the top of the frame 10; the rotating bearing is connected to the rotating gantry 12; optionally, the rotating bearing can be fixedly connected to the bottom of the rotating gantry 12; the rotating driven gear 13 is sleeved on the periphery of the rotating bearing; the first horizontal sliding mechanism is provided on the rotating driven gear 13, and the rotating driven gear 13 is used to drive the first horizontal sliding mechanism to rotate; the rotating driving gear 14 is engaged with the rotating driven gear 13; the first driving component 15 is provided on the frame 10, connected to the axle of the rotating driving gear 14, and is used to drive the rotating driving gear 14 to rotate.

[0031] For example, the first driving component 15 is a rotation driving motor.

[0032] Optionally, the first driving component 15 may be disposed on the top of the frame 10 , or may be disposed at other locations of the frame 10 , and the frame 10 is used to fix the first driving component 15 .

[0033] Optionally, the first driving component 15 may be located above the rotation driving gear 14 .

[0034] Optionally, the first driving component 15 may be located below the rotation driving gear 14 .

[0035] In a specific implementation, when a curved graphic is required to be printed in the printed image, the corresponding control instruction controls the first driving component 15 to operate. The first driving component 15 (e.g., a rotary drive motor) drives the rotating driving gear 14 to rotate, which in turn drives the rotating driven gear 13 to rotate. The rotating driven gear 13 drives the first horizontal sliding mechanism to rotate, which in turn drives the first vertical sliding mechanism to rotate, which in turn drives the printing carriage 11 to rotate, ultimately achieving rotational printing of the curved graphic by the nozzle in the printing carriage 11. This improves printing accuracy.

[0036] From the above content, it can be seen that when setting up the rotating mechanism, the rotating bearing, the rotating driven gear and the rotating driving gear work together to complete the rotational movement of the 3D printing device, which can easily adjust the rotation speed of the 3D printing device, help improve the 3D printing device when printing images more accurately, and improve printing accuracy and printing efficiency.

[0037] In an exemplary embodiment, the first horizontal sliding mechanism includes: Figure 1 The first horizontal slide rail 16 and the first slider ( Figure 1 Not shown) and the second driving component ( Figure 1(not shown in the figure) wherein the first horizontal slide rail 16 is mounted on the rotating mechanism; the rotating mechanism is used to drive the first horizontal slide rail 16 to rotate; the first slider is slidably mounted on the first horizontal slide rail; the second driving component is mounted on the first horizontal slide rail and connected to the first slider to drive the first slider to move horizontally on the first horizontal slide rail. The first vertical sliding mechanism is fixedly connected to the first slider.

[0038] For example, the first horizontal slide rail may also be referred to as the print carriage horizontal slide rail;

[0039] Optionally, the first horizontal sliding mechanism may also be a first ball screw linear module;

[0040] Optionally, the first horizontal slide rail may be provided on the rotation driven gear 13 of the rotation mechanism;

[0041] For example, the second driving component can also be called a printing carriage horizontal axis (such as x-axis) driving motor. Optionally, the second driving component can be arranged at one end of the first horizontal slide rail 16.

[0042] In the specific implementation, when it is necessary to realize horizontal printing of the image to be printed, the second driving component is controlled to work, and the second driving component drives the first slider to move horizontally on the first horizontal slide rail. Since the first vertical sliding mechanism is fixedly connected to the first slide, when the first slider moves horizontally on the first horizontal slide rail, the first slider drives the first vertical sliding mechanism to move horizontally, and the first vertical sliding mechanism drives the printing carriage to move horizontally, thereby finally realizing the horizontal movement of the printing carriage.

[0043] In an exemplary embodiment, the first vertical sliding mechanism includes: Figure 1 The first vertical slide rail 17 and the second slider ( Figure 1 Not shown) and the second drive motor ( Figure 1 (not shown in the figure). A first vertical rail 17 is fixedly connected to a first horizontal sliding mechanism; the first horizontal sliding mechanism is used to drive the first vertical rail 17 to move horizontally; a second slider is slidably disposed on the first vertical rail 17, and the printing carriage is fixedly connected to the second slider; a second drive motor is disposed on the first vertical rail 17 and connected to the second slider, and is used to drive the second slider to move up and down on the first vertical rail 17.

[0044] Specifically, the first vertical slide rail can also be called the vertical slide rail of the printing carriage 11.

[0045] Optionally, the first vertical slide rail 17 is fixedly connected to the first slider in the first horizontal sliding mechanism, so that when the first slider moves horizontally, it can drive the first vertical slide rail 17 to move horizontally, and then drive the printing carriage 11 to move horizontally.

[0046] For example, the second driving component can be called a printing carriage vertical axis (such as z-axis) driving motor. Optionally, the second driving component can be arranged at the upper end of the first vertical slide rail 17, or at the lower end of the first vertical slide rail 17.

[0047] During the process of printing an image on the object to be printed, if the printing carriage needs to be raised or lowered, the second driving component is used to drive the second slide to move up or down. Since the printing carriage is fixedly connected to the second slide, when the second slide moves up or down, the second slide will drive the printing carriage to move up or down at the same time.

[0048] In an exemplary embodiment, the 3D printing device may further include: a second horizontal sliding mechanism, a third horizontal sliding mechanism and Figure 1 and Figure 2 The tray 18 shown in FIG. The second horizontal sliding mechanism is disposed at the bottom of the frame; the third horizontal sliding mechanism is disposed on the second horizontal sliding mechanism; the second horizontal sliding mechanism is configured to drive the third horizontal sliding mechanism to move horizontally along the first horizontal direction; the second horizontal sliding mechanism is perpendicular to the third horizontal sliding mechanism; the first horizontal direction (e.g., the x-axis) and the second horizontal direction (e.g., the y-axis) are perpendicular to each other; the tray 18 is disposed on the third horizontal sliding mechanism; and the third horizontal sliding mechanism is configured to drive the tray to move horizontally along the second horizontal direction.

[0049] During the image printing process on an object to be printed, when the object to be printed cannot be moved and only the printing carriage can be moved, the printing carriage can only achieve a fixed range of rotational printing based on a fixed center of a circle (the center of a circle in the direction of looking down at the 3D printing device). However, in the above embodiment, the second horizontal sliding mechanism and the third horizontal sliding mechanism act together on the tray, allowing the tray to move freely forward, backward, left, and right, achieving a wider range of rotational printing based on multiple different center points, thereby improving the printing range and printing efficiency. In short, setting the base (tray) of the object to be printed to a movable type enables arc printing with different center points, enhancing the applicability of 3D printing.

[0050] In an exemplary embodiment, the second horizontal sliding mechanism may include: Figure 1 and Figure 2 The second horizontal rail 19, the third slider (also called the tray x-axis slider), and the third driving component are shown. The second horizontal rail 19 is mounted on the frame; the third slider (also called the tray x-axis slider) is slidably mounted on the second horizontal rail 19; the third driving component is mounted at one end of the second horizontal rail 19 and connected to the third slider, for driving the third slider to move horizontally along a first horizontal direction (e.g., the x-axis); specifically, the third driving component can be a tray x-axis drive motor; and the first horizontal direction can be the x-axis.

[0051] For example, the second horizontal slide rail 19 may be referred to as a tray x-axis slide rail.

[0052] Alternatively, as Figure 1 Shown and Figure 2 As shown, the second horizontal slide rail 19 can be a rectangular slide rail, which is arranged at the bottom of the rectangular parallelepiped frame.

[0053] In a specific implementation, the third driving component controls the third slide to move along the first horizontal direction (eg, the x-axis) on the second horizontal slide rail according to corresponding instructions.

[0054] For example, the second horizontal sliding mechanism may also be a second ball screw linear module.

[0055] In an exemplary embodiment, the third horizontal sliding mechanism may include: Figure 1 and Figure 2 , the third horizontal rail 20, the fourth slider (not shown in the figure), and the fourth driving component (not shown in the figure) are shown. The third horizontal rail 20 is fixedly connected to the third slider; the third horizontal rail 20 is perpendicular to the second horizontal rail 19; the fourth slider is slidably disposed on the third horizontal rail 20; the fourth driving component is disposed on the third horizontal rail 20 and connected to the fourth slider for driving the fourth slider to move horizontally along a second horizontal direction (e.g., the y-axis); and the tray 18 is fixedly connected to the fourth slider.

[0056] For example, the fourth slider may also be referred to as a tray y-axis slider.

[0057] For example, the third horizontal slide rail may also be referred to as a tray y-axis slide rail.

[0058] For example, the fourth driving component may be a tray y-axis driving motor.

[0059] Optionally, the fourth driving component may be disposed at the first end of the third horizontal slide rail 20 .

[0060] Optionally, the fourth driving component may be disposed at the second end of the third horizontal slide rail 20 .

[0061] Alternatively, as Figure 1 and Figure 2 As shown, the third horizontal slide rail 20 can be a rectangular slide rail.

[0062] In a specific implementation, the third driving component controls the third slide to move along the first horizontal direction (for example, the x-axis) on the second horizontal slide according to the corresponding instructions. The third slider drives the third horizontal slide to move along the first horizontal direction, and the fourth slider on the third horizontal slide 20 drives the tray 18 to move horizontally along the second horizontal direction (for example, the y-axis). In this way, the second horizontal slide 19 and the third horizontal slide 20 together form a cross-shaped slide, which can drive the tray to move horizontally in the two horizontal directions of the x-axis and the y-axis. When the printing carriage 11 is moving the object to be printed, since the object to be printed can move horizontally in the two horizontal directions of the x-axis and the y-axis with the tray 18, 3D printing with different centers of circles can be achieved. This improves printing efficiency. Furthermore, the second horizontal slide 19 and the third horizontal slide 20 are both rectangular slides, which can improve the stability of the tray and further improve printing efficiency.

[0063] For example, the third horizontal sliding mechanism may also be a third ball screw linear module.

[0064] In an exemplary embodiment, the 3D printing device may further include a sanding mechanism disposed on the frame. The sanding mechanism includes: a fourth horizontal sliding mechanism, a second vertical sliding mechanism and Figure 1 The sanding trolley 21 shown in FIG. A fourth horizontal sliding mechanism (the sanding trolley x-axis horizontal sliding mechanism) is disposed on the frame; a second vertical sliding mechanism (the sanding trolley z-axis vertical sliding mechanism) is disposed on the fourth horizontal sliding mechanism and is perpendicular to the fourth horizontal sliding mechanism; the fourth horizontal sliding mechanism is used to drive the second vertical sliding mechanism to move horizontally along the horizontal direction (e.g., the x-axis); the sanding trolley 21 is disposed on the second vertical sliding mechanism; the second vertical sliding mechanism is used to drive the sanding trolley 21 to move up and down.

[0065] In a specific implementation, the fourth horizontal sliding mechanism and the second vertical sliding mechanism can drive the sand-laying trolley to move horizontally along, for example, the x-axis and move up and down along, for example, the z-axis, thereby realizing additive manufacturing of the sand-laying trolley.

[0066] In an exemplary embodiment, the fourth horizontal sliding mechanism may include: Figure 1 The fourth horizontal rail 22, the fifth slider (not shown), and the fifth driving component (not shown) are shown. The fourth horizontal rail 22 is disposed on the frame 10; the fifth slider is slidably disposed on the fourth horizontal rail 22; and the fifth driving component (also known as the sanding trolley x-axis driving motor) can be disposed at one end of the fourth horizontal rail 22 and connected to the fifth slider to drive the fifth slider to move horizontally on the fourth horizontal rail 22.

[0067] Optionally, the fourth horizontal slide rail 22 may be provided on a side vertical rod of the rectangular parallelepiped frame.

[0068] For example, the fourth horizontal slide rail 22 may also be referred to as the sanding trolley x-axis slide rail.

[0069] In an exemplary embodiment, the second vertical sliding mechanism may include: Figure 1 The second vertical rail 23, the sixth slider (not shown in the figure), and the sixth driving component (not shown in the figure) are shown. The second vertical rail 23 is fixedly connected to the fifth slider; the fifth slider can drive the second vertical rail 23 to move horizontally when it moves horizontally on the fourth horizontal rail 22; the sixth slider is disposed on the second vertical rail 23; the sixth driving component (also known as the z-axis driving motor of the sanding trolley) is disposed at one end of the second vertical rail 23 and connected to the sixth slider, and is used to drive the sixth slider to move up and down on the second vertical rail 23; the sixth slider is fixedly connected to the sanding trolley 21, and when the sixth slider moves up and down on the second vertical rail 23, it drives the sanding trolley 21 to move up and down.

[0070] For example, the second vertical slide rail can also be called the sanding trolley z-axis slide rail.

[0071] From the above content, it can be seen that the sand-laying trolley can move horizontally along, for example, the x-axis, or move up and down along, for example, the z-axis under the joint action of the fourth horizontal sliding mechanism and the second vertical sliding mechanism, so that additive manufacturing can be achieved.

[0072] The 3D printer can also be connected to a motherboard with an ARM processor. The ARM processor controls the movement of the printing carriage and the glue spraying process. The ARM processor also features serial and IO interfaces for connecting to a programmable logic controller (PLC), the chip that controls the sand-spreading signals. These two interfaces allow for compatibility with a wide range of sand-spreading machines, ensuring the versatility of the 3D printer.

[0073] In an exemplary embodiment, the 3D printing device may further include: Figure 3 The horizontal right angle detector shown in the figure is arranged on the printing carriage 11. The horizontal right angle detector includes a vertical rod 24 and two horizontal slots 25 integrally formed with the vertical rod 24. A level ruler is arranged in each horizontal slot 25.

[0074] In addition, during the specific operation, a maximum circle is pre-printed before printing, and the diameter of the circle is measured to see whether it is the same as the theoretical diameter of the rotating mechanism, so as to determine whether the rotating mechanism is deformed.

[0075] As can be seen from the above, after installing a horizontal right-angle detector on the 3D printing device, the horizontal and vertical states of the print carriage's horizontal and vertical moving mechanisms can be determined before each print based on the two levels in the horizontal right-angle detector. This avoids undesirable results such as printing misalignment and glue tilting and sliding caused by the horizontal moving mechanism being not level, and also avoids low printing accuracy caused by the vertical moving mechanism not being in a vertical state. Printing a test pattern before printing ensures the normal shape of the rotation axis and avoids low printing accuracy caused by distortion of the printed arc.

[0076] In an optional embodiment, a method for determining estimated coordinates can be used for the above-mentioned 3D printing device, and the method for determining estimated coordinates includes: obtaining the theoretical coordinates of the printing carriage and the actual coordinates of the grating measurement, inputting the theoretical coordinates and the actual coordinates into the Kalman filter, and the Kalman filter performs optimization based on the input content, and the output value is the final coordinate value. The method for obtaining the theoretical coordinates includes: establishing X and Y coordinates with the center of the top of the rectangular frame as the origin, when printing in a line-by-line printing manner, the coordinates of the printing carriage are (x, y), when printing in a rotational printing manner, the coordinates of the printing carriage are (x=x0+r cosθ, (y=y0+rsinθ), (x0, y0) are the coordinates of the center of the circle of the rotational printing.

[0077] In an optional embodiment, a coordinate filtering algorithm can be used for the above-mentioned 3D printing device, and the coordinate filtering algorithm includes: applying the set motor parameters to calculate the theoretical coordinate X1 at the end of the movement and the measured coordinate X2 obtained by the encoder, and calculating the current optimal estimated coordinate X. Wherein, X = X1*(1-a)+X2*a, a(1≥a≥0) is a weight coefficient, which can be used as a functional parameter of the machine and set in the application software. The advantage of this is that the optimal solution for the estimated coordinates can be calculated based on the performance of the motors and encoders of different machines. When the performance of the encoder of the machine is better, a takes a larger value, increases the weight of X2, and makes the final estimate better. When the motor performance parameters are better, the same applies.

[0078] In a specific application scenario, when printing a three-dimensional rotating object such as a cone, an encoder is a sensor that measures the rotation angle of the motor (here, the motor that drives the driving gear). However, it cannot directly measure the distance a point on diameter d moves when the motor rotates through a certain angle. If the printing method is to directly print one pixel at a fixed angle, the number of pixels in a 360-degree circle is fixed, and the farther away from the center of the circle, the more distorted the image will be.

[0079] In order to solve the above technical problems, the present invention divides the three-dimensional rotating body to be printed into M layers to be printed, and divides each layer to be printed into N concentric ring printing bands of different diameters, starting from the outermost concentric ring printing band until the innermost concentric ring printing band is printed. For example, Figure 4 As shown. Wherein, M and N are both positive integers greater than 1. Finally, the printing of the entire three-dimensional rotating body to be printed is completed.

[0080] It is understandable that, for all the concentric circular printing bands in each layer to be printed, the number of feedback pulses Pr per one rotation of the rotary table is the same fixed value that can be preset.

[0081] The printing process using the above-mentioned 3D printing device includes:

[0082] Acquisition step: Acquiring device information; the device information includes at least a preset number of feedback pulses Pr per rotation of the rotary table, a preset cross slide X-axis resolution Xr, a preset cross slide Z-axis resolution Zr, a preset printing resolution accuracy R, a preset ignition frequency Fr, and a preset step speed Xs and a preset step speed Zs, and diameters d of concentric ring printing bands of different diameters;

[0083] First processing step:

[0084] 1) Start printing from the outermost concentric ring printing band of the current layer to be printed;

[0085] Substitute the diameter d1 of the outermost concentric ring printing belt and the preset cross slide X-axis resolution Xr into the formula

[0086] x=d / 2*Xr;

[0087] Calculate the initial x coordinate of the printing car;

[0088] 2) Control the printing carriage to move to the initial x-coordinate of the x-axis;

[0089] 3) Substitute the preset number of feedback pulses Pr, the preset printing resolution accuracy R, and the diameter d1 of the outermost concentric ring printing band into the formula: Fc = Pr / (R*d*π);

[0090] Calculate the ignition frequency division coefficient Fc;

[0091] 4) Substitute the preset ignition frequency Fr and the preset printing resolution accuracy R into the formula: Sr = Fr / R to calculate the rotation speed Sr;

[0092] Based on the rotation speed Sr and the ignition frequency division coefficient Fc, the printing carriage is controlled to print the current outermost concentric ring printing belt;

[0093] Second processing step:

[0094] 5) After printing the outermost concentric ring print band, substitute the preset cross slide X-axis resolution Xr and the preset print resolution accuracy R into the formula: Xl = Xr / R;

[0095] 6) Calculate the X-axis step distance X1, that is, obtain the X-axis step X1 pulses;

[0096] 7) Based on the stepping distance X1, control the printing carriage to complete the corresponding stepping; record the outermost concentric ring printing band as the first concentric ring printing band;

[0097] 8) Substitute the diameter d1 of the first concentric ring printing band and the step distance X1 into the formula: d2 = d1 – (1 / X1);

[0098] Calculate and obtain the diameter d2 of the second concentric ring printing band; the second concentric ring printing band is a concentric ring printing band adjacent to the first concentric ring printing band;

[0099] 9) Substitute the diameter d2 of the second concentric ring printing band and the preset cross slide X-axis resolution Xr into the above-mentioned formula: x = d / 2*Xr;

[0100] 10) Calculate the updated x-coordinate of the printing vehicle;

[0101] 11) Control the printing carriage to move to the updated x-coordinate of the x-axis;

[0102] 12) Substitute the preset number of feedback pulses Pr, the preset printing resolution accuracy R, and the diameter d2 of the second concentric ring printing band into the formula: Fc = Pr / (R*d*π);

[0103] 13) Calculate the updated ignition frequency division coefficient Fc;

[0104] 14) Substitute the preset ignition frequency Fr and the preset printing resolution accuracy R into the formula: Sr = Fr / R to calculate the updated rotation speed Sr;

[0105] 15) Based on the updated rotation speed Sr and the updated ignition frequency division coefficient Fc, the printing carriage is controlled to print the second concentric circular printing band.

[0106] 16) until all the concentric ring printing bands in the current image to be printed are printed.

[0107] Third processing step:

[0108] 17) When the current layer to be printed is printed, the preset cross slide Z-axis resolution Zr and the preset printing resolution accuracy R are substituted into the formula: Zl = Zr / R to calculate the Z-axis step distance Zl, that is, the Z-axis step Zl pulses;

[0109] 18) Based on the stepping distance Z1, control the printing carriage to complete the corresponding stepping;

[0110] 19) When the printing carriage completes the Z-axis stepping, repeat steps 8) to 16) to complete the printing of the current layer to be printed.

[0111] 20) Complete the printing of the entire three-dimensional rotating body to be printed.

[0112] From the above, we can see that by calculating and updating the frequency division coefficient Fr, the printing system controlling the 3D printing device can determine how many coordinate pulses need to be returned to fire once and print one pixel. The frequency division coefficient is derived from the diameter d of the current circle and the number of pulses Pr fed back in one cycle. This ensures that when printing different circles, the printing carriage always moves a fixed distance to fire once and print one pixel. This ensures that the density of pixels on different circles is the same, thus solving the problem of image distortion caused by distance from the center of the circle. The printed image is more realistic and fuller, greatly improving printing efficiency.

[0113] In the description of the above embodiments, specific features, structures, materials or characteristics may be combined in an appropriate manner in any one or more embodiments or examples.

[0114] The above are only specific embodiments of the present application, but the scope of protection of this application is not limited thereto. Any changes or substitutions that can be easily conceived by a person skilled in the art within the technical scope disclosed in this application should be included in the scope of protection of this application. Therefore, the scope of protection of this application should be based on the scope of protection of the claims.

Claims

1. A 3D printing device, characterized in that: include: frame; A rotating mechanism is provided on the frame; A first horizontal sliding mechanism is provided on the rotating mechanism; The rotating mechanism is used to drive the first horizontal sliding mechanism to rotate in a horizontal plane; a first vertical sliding mechanism, disposed on the first horizontal sliding mechanism; the first horizontal sliding mechanism is used to drive the first vertical sliding mechanism to move horizontally; A printing carriage is provided on the first vertical sliding mechanism; the first vertical sliding mechanism is used to drive the printing carriage to move up and down; a second horizontal sliding mechanism, disposed at the bottom of the frame; a third horizontal sliding mechanism, disposed on the second horizontal sliding mechanism; the second horizontal sliding mechanism is used to drive the third horizontal sliding mechanism to move horizontally along the first horizontal direction; A tray is disposed on the third horizontal sliding mechanism; the third horizontal sliding mechanism is used to drive the tray to move horizontally along a second horizontal direction, the first horizontal direction being perpendicular to the second horizontal direction; the second horizontal sliding mechanism and the third horizontal sliding mechanism drive the tray to move, thereby realizing rotational printing with multiple different centers; When the 3D printing device prints a three-dimensional rotating object to be printed, the printing process includes: Acquire device information; the device information includes at least a preset number of feedback pulses Pr per rotation of the rotary table, a preset cross slide X-axis resolution Xr, a preset cross slide Z-axis resolution Zr, a preset printing resolution accuracy R, a preset ignition frequency Fr, and a preset step speed Xs and a preset step speed Zs, and the diameter d of concentric ring printing bands of different diameters; 1) Start printing from the outermost concentric ring printing band of the current layer to be printed; substitute the diameter d1 of the outermost concentric ring printing band and the preset cross slide X-axis resolution Xr into the formula: x = d / 2*Xr; Calculating the initial x-coordinate of the printing carriage; 2) Controlling the printing carriage to move to the initial x-coordinate of the x-axis; 3) Substituting the preset number of feedback pulses Pr, the preset printing resolution accuracy R, and the diameter d1 of the outermost concentric ring printing band into the formula: Fc=Pr / (R*d*π); Calculate the ignition frequency division coefficient Fc; 4) Substituting the preset ignition frequency Fr and the preset printing resolution accuracy R into the formula: Sr = Fr / R, and calculating the rotation speed Sr; Based on the rotation speed Sr and the ignition frequency division coefficient Fc, the printing carriage is controlled to print the current outermost concentric ring printing band; 5) After the outermost concentric ring print band is printed, the preset cross slide X-axis resolution Xr and the preset printing resolution accuracy R are substituted into the formula: Xl = Xr / R; 6) Calculate the X-axis step distance X1, that is, obtain the X-axis step X1 pulses; 7) Based on the stepping distance X1, controlling the printing carriage to complete the corresponding stepping; recording the outermost concentric ring printing band as the first concentric ring printing band; 8) Substitute the diameter d1 of the first concentric circular printing band and the step distance X1 into the formula: d2 = d1 – (1 / X1); Calculating and obtaining a diameter d2 of a second concentric ring printing band; wherein the second concentric ring printing band is a concentric ring printing band adjacent to the first concentric ring printing band; 9) Substituting the diameter d2 of the second concentric circular printing band and the preset cross slide X-axis resolution Xr into the formula: x=d / 2*Xr; 10) Calculating the updated x-coordinate of the printing carriage; 11) Controlling the printing carriage to move to the updated x-coordinate of the x-axis; 12) Substituting the preset number of feedback pulses Pr, the preset printing resolution accuracy R, and the diameter d2 of the second concentric circular printing band into the formula: Fc=Pr / (R*d*π); 13) Calculate the updated ignition frequency division coefficient; 14) Substitute the preset ignition frequency Fr and the preset printing resolution accuracy R into the formula: Sr = Fr / R to calculate the updated rotation speed; 15) Based on the updated rotation speed and the updated ignition frequency division coefficient, controlling the printing carriage to print a second concentric ring printing band; 16) until all concentric ring printing bands in the current image to be printed are printed; 17) When the current layer to be printed is printed, the preset cross slide Z-axis resolution Zr and the preset printing resolution accuracy R are substituted into the formula: Zl = Zr / R to calculate the Z-axis step distance Zl, that is, the Z-axis step Zl pulses; 18) Based on the stepping distance Z1, controlling the printing carriage to complete the corresponding stepping; 19) When the printing carriage completes the Z-axis stepping, repeat steps 8) to 16) to complete the printing of the current layer to be printed; 20) Complete the printing of the entire three-dimensional rotating body to be printed.

2. The 3D printing device according to claim 1, characterized in that The rotating mechanism comprises: A rotating platform fixedly connected to the top of the frame; A rotary bearing connected to the rotary platform; A rotating driven gear is sleeved on the outer periphery of the rotating bearing; the first horizontal sliding mechanism is provided on the rotating driven gear, and the rotating driven gear is used to drive the first horizontal sliding mechanism to rotate; a rotating driving gear meshing with the rotating driven gear; The first driving component is provided on the frame and connected to the axle of the rotating driving gear, and is used for driving the rotating driving gear to rotate.

3. The 3D printing device according to claim 1, characterized in that The first horizontal sliding mechanism comprises: A first horizontal slide rail is provided on the rotating mechanism; the rotating mechanism is used to drive the first horizontal slide rail to rotate; a first sliding block, slidably disposed on the first horizontal sliding rail; The second driving component is provided on the first horizontal slide rail and is connected to the first slider, and is used for driving the first slider to move horizontally on the first horizontal slide rail.

4. The 3D printing device according to claim 1, characterized in that: The first vertical sliding mechanism comprises: a first vertical slide rail fixedly connected to the first horizontal slide mechanism; the first horizontal slide mechanism is used to drive the first vertical slide rail to move horizontally; a second slider, slidably disposed on the first vertical slide rail, the printing carriage being fixedly connected to the second slider; The second driving motor is provided on the first vertical slide rail and is connected to the second slider, and is used for driving the second slider to move up and down on the first vertical slide rail.

5. The 3D printing device according to claim 4, characterized in that: The second horizontal sliding mechanism comprises: a second horizontal slide rail, disposed on the rack; a third sliding block, slidably disposed on the second horizontal sliding rail; a third driving component, disposed on the second horizontal slide rail and connected to the third slider, for driving the third slider to move horizontally along the first horizontal direction; The third horizontal sliding mechanism comprises: a third horizontal slide rail, fixedly connected to the third slider; the third horizontal slide rail is perpendicular to the second horizontal slide rail; a fourth sliding block, slidably disposed on the third horizontal sliding rail; A fourth driving component is provided on the third horizontal slide rail and is connected to the fourth slider, and is used for driving the fourth slider to move horizontally along the second horizontal direction; wherein the tray is fixedly connected to the fourth slider.

6. The 3D printing device according to claim 1, characterized in that: It also includes a sand-laying mechanism, which is arranged on the frame.

7. The 3D printing device according to claim 6, characterized in that: The sand-laying mechanism comprises: a fourth horizontal sliding mechanism, disposed on the frame; a second vertical sliding mechanism, disposed on the fourth horizontal sliding mechanism and perpendicular to the fourth horizontal sliding mechanism; the fourth horizontal sliding mechanism is used to drive the second vertical sliding mechanism to move horizontally in the horizontal direction; The sand-laying trolley is arranged on the second vertical sliding mechanism; the second vertical sliding mechanism is used to drive the sand-laying trolley to move up and down.

8. The 3D printing device according to claim 1, characterized in that: The frame is a rectangular parallelepiped frame.

9. The 3D printing device according to claim 3, characterized in that: Also includes: A horizontal right angle detector is arranged on the printing carriage; the horizontal right angle detector includes a vertical rod and two horizontal slots integrally formed with the vertical rod, and a level ruler is arranged in each of the horizontal slots.

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