Workbench for 3D printer and 3D printing side face repairing method

Abstract

The invention relates to the technical field of 3D printing, in particular to a workbench for a 3D printer and a 3D printing side face repairing method.The workbench comprises the 3D printer, a base plate, a driving motor, an overturning assembly, a workbench body, a fixing mechanism, a fixing wheel, a supporting assembly and a supporting rod; a cutting device is mounted on the 3D printer, and a base plate is mounted on the 3D printer in a sliding manner; a driving motor is fixedly installed on the base plate, an overturning assembly is arranged on the driving motor, the overturning assembly is connected with the workbench, the workbench is rotationally connected with the base plate, and the driving motor drives the two sides of the workbench to overturn through the overturning assembly; fixing mechanisms are arranged on the workbench in an annular array mode. The supporting assembly is connected with the workbench, the supporting assembly is connected with the supporting rod, when the workbench is overturned, the workbench drives the supporting rod to support the workpiece in a sliding mode through the supporting assembly, overturning of the workbench is achieved through rotating motion, then multi-angle adjustment of the workpiece is achieved, repairing of the side face of the workpiece is achieved, and the repairing universality is improved.

Description

Technical Field

[0001] This invention relates to the field of 3D printing technology, specifically to a worktable for a 3D printer and a method for repairing the side of a 3D printed surface. Background Technology

[0002] 3D printing repair is an advanced process that uses additive manufacturing technology to partially or completely repair damaged or worn workpieces. It combines 3D modeling, materials science, and precision manufacturing technology to efficiently and accurately restore the function and structure of workpieces.

[0003] For 3D printing repair technology of automotive interiors, the first step is to use a coordinate measuring machine to perform a 3D scan of the surface of the workpiece to be repaired to obtain a 3D model of the workpiece. Then, the 3D model of the workpiece to be repaired is compared with the original 3D model of the workpiece to obtain the coordinates of the damaged location. The damaged location is then cut out and 3D printed using a 3D printer. Finally, the printed part is glued to the workpiece to complete the repair.

[0004] However, the repair process is quite complicated because it involves printing the damaged area with a 3D printer and then gluing it in place. In addition, the glue bonding creates tiny gaps between the repaired area and the workpiece, and the repaired area is prone to falling off.

[0005] In view of this, we propose a worktable for a 3D printer and a method for repairing the side of a 3D printed surface. Summary of the Invention

[0006] The purpose of this invention is to provide a worktable for a 3D printer and a method for repairing the side of a 3D printed surface, so as to solve the problem of inconvenient workpiece repair mentioned in the background art.

[0007] To achieve the above objectives, the present invention provides the following technical solution: A 3D printer worktable and a 3D printing side repair method include a 3D printer, a substrate, a drive motor, a flipping assembly, a worktable, a fixing mechanism, fixing wheels, a support assembly, and a support rod; The 3D printer is equipped with a cutting device, which is used to cut the damaged area. The cutting device consists of a robotic arm and a cutting tool. The robotic arm controls the cutting tool to move with multiple degrees of freedom to cut the damaged area. A substrate is slidably mounted on the 3D printer via a ball screw. The ball screw drives the substrate to slide up and down, thereby adjusting the distance between the extrusion head and the substrate. A drive motor is fixedly mounted on the substrate, and the drive motor is equipped with a flipping component. The flipping component is connected to the worktable, and the worktable is rotatably connected to the substrate. The drive motor drives the worktable to flip on both sides through the flipping component, thereby achieving side repair. The forward and reverse rotation of the drive motor, through the flipping component, drives the worktable to flip on both sides, improving the freedom of repair processing and thus increasing the repair range. The flipping of the worktable also drives the workpiece on the worktable to flip synchronously, so that the side of the workpiece is opposite to the extrusion head, thereby facilitating the extrusion head to extrude wire to repair the workpiece. A fixing mechanism is arranged in a ring on the worktable. The fixing mechanism is used to fix the workpiece and to initially fix the workpiece, thereby facilitating the cutting device to cut the damaged area of ​​the workpiece. The base plate is provided with a support assembly, which is connected to the worktable and a support rod. When the worktable is flipped, the worktable drives the support rod to slide and support the workpiece through the support assembly. When the worktable is flipped, the workpiece flips synchronously with the worktable. Under the action of gravity and center of gravity, the workpiece will move along the worktable to avoid sliding downward. At this time, the support assembly drives the support rod to fix the workpiece. As the flipping angle is greater, the fastening force of the support rod on the workpiece is greater.

[0008] Preferably, there are four fixing mechanisms, which are arranged in pairs. Each fixing mechanism is divided into a flipping group and a limiting group. The flipping group has flipping components on both sides, and the limiting group is connected to the support component. The flipping group is fixed to the flipping end of the worktable. The fixing mechanism includes an electric push rod and a ejector pin. The electric push rod is installed at the four ends of the worktable, and the ejector pin is fixedly installed on the electric push rod. In the initial stage, the operator places the workpiece on the worktable and then starts the electric push rod. The electric push rod drives the ejector pin to slide synchronously, and the ejector pin realizes the centering and fixing of the workpiece, which facilitates the cutting device to cut the damaged area.

[0009] Preferably, the flipping mechanism includes a drive shaft, a bushing, a drive plate, a flipping wheel, and a fixed plate; the drive shaft is fixedly mounted to a drive motor, the drive shaft has threads, and a bushing is slidably mounted on the drive shaft; the bushing has a threaded groove that mates with the drive shaft, the drive motor rotates and drives the drive shaft to rotate synchronously, the drive shaft, through its threads, presses against the threaded groove in the bushing, thus pushing the threaded groove to slide horizontally, when the drive motor rotates forward, the drive motor drives the bushing to slide forward through the drive shaft, and when the drive motor rotates in reverse, the bushing slides backward; both ends of the bushing are fixedly mounted to the drive plate via connecting rods; the drive... The moving plate has symmetrical teeth at both ends, and the driving plate has symmetrically arranged rotating wheels between the teeth. The rotating wheels are rotatably mounted to the base plate and fixedly mounted to the worktable. When the bushing slides horizontally, it drives the driving plate to move synchronously. The driving plate drives the rotating wheels in the direction of movement of the bushing to rotate through the teeth on its wheels, and then drives the worktable to rotate through the rotating wheels. Fixed plates are installed at both ends of the driving plate. The fixed plates are slidably connected to the base plate. A support plate is provided on one side of the fixed plate. When the driving plate slides, it drives the fixed plate to move synchronously. The fixed plate fixes the other end of the worktable, which facilitates the deflection of the worktable for repairing the workpiece.

[0010] Preferably, the fixing plate is provided with a wavy pattern, which is tangent to the worktable. The wavy pattern enhances the friction between the fixing plate and the worktable, thereby improving the fixing effect on one end of the worktable and thus improving the stability of the other end of the worktable when flipped. The tangency of the wavy pattern with the worktable ensures that the force exerted by the wavy pattern on the worktable always acts on the center position of the worktable, thereby stabilizing the force on the worktable and ensuring the fixing effect of the wavy pattern on the worktable.

[0011] Preferably, the support assembly includes a fixed wheel, a drive wheel, a transmission shaft, a driven wheel, a driven rack, a slide plate, and a lever; the fixed wheel is symmetrically mounted above the base plate, located below the flipping assembly, and the central axes of the fixed wheel and the flipping wheel are on the same vertical plane; the drive wheel is located above the fixed wheel, and is rotatably mounted to the worktable. When the worktable flips, the worktable drives the rotatably mounted drive wheel to rotate synchronously. When the drive wheel rotates, it meshes with the fixed wheel below, causing the drive wheel to rotate on its own axis. The drive wheel is fixedly mounted to the transmission shaft; driven wheels are mounted at both ends of the transmission shaft. The rotation of the drive wheel drives the transmission shaft to rotate synchronously, and the transmission shaft drives the driven wheels at both ends to rotate synchronously; a driven rack is provided below the driven wheel; the driven rack is slidably mounted to the worktable, and one end of the driven rack is positioned... The workpiece contacts the support plate on the outside of the worktable. The support plate supports the driven rack, ensuring the stability of the driven rack's movement when the worktable flips. A sliding plate is fixedly installed at the other end of the driven rack. The sliding plate has a sliding groove, and a support rod is installed in the sliding groove. The front end of the support rod has a conical structure. When the driven wheel rotates, it meshes with the driven rack, thereby driving the driven rack to slide. The driven rack drives the sliding plate to move synchronously, and the sliding causes the support plate to move synchronously to fix the workpiece, preventing the workpiece from slipping due to the worktable flipping. A lever is provided on one side of the support rod. The lever is fixedly connected to the support rod and fixedly installed with the ejector pin of the limit group. Initially, the electric push rod of the limit group drives the ejector pin to move synchronously. The ejector pin pushes the support rod to slide in the sliding rod through the lever, so that the support rod always coincides with the workpiece.

[0012] Preferably, the support plate has an arc surface, and the outer end of the driven rack is a hemispherical structure that matches the arc surface. When the worktable flips, the worktable drives the driven rack to move synchronously, and the driven rack rotates relative to the support plate. The arc surface of the support plate ensures that the driven rack is always in contact with the support plate, and the hemispherical structure enhances the contact area between the driven rack and the support plate, thus ensuring the fixing effect of the support plate on the driven rack.

[0013] Preferably, the height of the support rod is lower than the height of the ejector pin of the flipping group; the support rod and the ejector pin of the flipping group form an isosceles triangle structure, and the three-point fixation of the support rod and the ejector pin improves the stability of the workpiece fixation. At the same time, the two legs of the isosceles triangle are of equal length, so that when the support rod and the ejector pin are subjected to the downward sliding force of the workpiece, the two legs can evenly distribute the external force, thereby improving the stability of the workpiece fixation.

[0014] Preferably, the support rod consists of a fixed rod, a sliding rod, and a telescopic spring. The fixed rod is slidably installed in the sliding groove, and the sliding rod is slidably installed inside the fixed rod. The sliding rod is connected to the fixed rod via the telescopic spring. The top of the sliding rod has a conical structure. Since the shape of the workpiece is not fixed, the gap between the workpiece and the support rod varies. At this time, the overall length of the support rod is adjusted by the telescopic spring to fix the workpiece. Simultaneously, when the worktable is flipped, the sliding rod pushes the fixed rod to move synchronously. Since the sliding rod is already fixed to the workpiece, the fixed rod compresses the telescopic spring, increasing the compression of the telescopic spring and thus increasing the reaction force. This enhances the pushing effect of the telescopic spring on the sliding rod, thereby strengthening the fixing force of the sliding rod on the workpiece and ensuring the fixing effect of the workpiece. At the same time, as the flipping angle increases, the sliding distance of the fixed plate increases, the compression of the telescopic spring increases, and the reaction force generated is greater, thus increasing the fixing force on the workpiece. This achieves the effect of synchronously enhancing the fixing effect of the workpiece as the flipping angle increases, thereby avoiding the initial fixing force being too large, causing the ejector pin to shrink the workpiece, or the fixing force being too small, causing the workpiece to slip.

[0015] Preferably, the lever is provided with a retaining ring, which is connected to the fixed rod. The lever is connected to the fixed rod through the retaining ring, thereby driving the support rod to move synchronously with the lever, so that the support rod always coincides with the workpiece. At the same time, the retaining ring makes it easy to disassemble and replace the support rod. Different support rods can be replaced according to the size of the workpiece to ensure the fixation effect on the workpiece.

[0016] A 3D printing method for side repair: Step 1: The workpiece is fixed on the worktable by a fixing mechanism, and then 3D scanning is performed; The fixing mechanism fixes the workpiece on the worktable, and then the workpiece is three-dimensionally modeled using a coordinate measuring machine with existing technology. The existing model of the workpiece is then compared with the original model to determine the damaged area. Step 2: The cutting device cuts the damaged area of ​​the workpiece; When the coordinates of the damaged area are determined, the robotic arm on the cutting device moves, which in turn drives the fixedly installed blade to cut the damaged area; Step 3: The 3D printer repairs the workpiece using the extrusion head; After cutting, the 3D printer starts up and melts and extrudes the filament through the extrusion head to repair the damaged area; Step 4: The tilting component drives the worktable to tilt and adjust the position of the workpiece side. When it is necessary to repair the side of the workpiece, the drive motor drives the worktable to rotate through the flipping component, thereby adjusting the position of the workpiece on the worktable so that the side of the workpiece is opposite to the extrusion head, making it easier for the extrusion head to repair the side. Step 5: The support components enhance the fixing effect with support rods; When the worktable is flipped, the support assembly enhances the fixation of the workpiece through the support rod, preventing the workpiece from slipping.

[0017] Compared with the prior art, the beneficial effects of the present invention are: A 3D printer worktable and a 3D printing side repair method are disclosed. The invention realizes the flipping of the worktable through a flipping component and a support component, thereby enabling multi-angle rotation of the workpiece and reducing the difficulty of repairing the side of the workpiece.

[0018] A worktable for a 3D printer and a method for 3D printing side repair. The present invention improves the fixation effect of the support component on the workpiece by using a flipping component, ensuring the stability of the workpiece when flipping, avoiding workpiece slippage and affecting the repair effect.

[0019] A worktable for a 3D printer and a method for repairing the side of a 3D printer. This invention achieves a balance between the flipping angle and the fixing force through a support component, avoiding the problem of insufficient fixing force caused by a large flipping angle. Attached Figure Description

[0020] Figure 1 This is a schematic diagram of the overall 3D printer of the present invention; Figure 2 For the present invention Figure 1 A magnified view of point A; Figure 3 This is an overall schematic diagram of the substrate of the present invention; Figure 4 This is a half-sectional view of the substrate of the present invention; Figure 5 For the present invention Figure 4 A magnified view of point B; Figure 6 This is a schematic diagram of the overall flipping component and support component of the present invention; Figure 7 This is a bottom view of the flipping component of the present invention; Figure 8 This is a vertical cross-sectional view of the substrate of the present invention; Figure 9 For the present invention Figure 8 A magnified view of point C; Figure 10 This is a half-sectional view of the support component of the present invention; Figure 11 This is a horizontal cross-sectional view of the substrate of the present invention; Figure 12 For the present invention Figure 11 A magnified view of point D; Figure 13 This is a vertical sectional view of the worktable of the present invention; Figure 14 For the present invention Figure 13 A magnified view of point E; Figure 15 This is a half-sectional view of the support rod of the present invention.

[0021] In the picture: 1. 3D printer; 2. Substrate; 3. Drive motor; 4. Tilting assembly; 41. Drive shaft; 42. Bushing; 43. Drive plate; 44. Tilting wheel; 45. Fixing plate; 451. Wavy texture; 452. Support plate; 4521. Curved surface; 5. Workbench; 6. Fixing mechanism; 61. Tilting assembly; 62. Limiting assembly; 63. Electric push rod; 64. Ejector pin; 7. Support assembly; 71. Fixed wheel; 72. Drive wheel; 73. Transmission shaft; 74. Driven wheel; 75. Driven rack; 751. Hemispherical structure; 76. Slide plate; 761. Sliding groove; 77. Lever; 771. Snap ring; 8. Support rod; 81. Isosceles triangle structure; 82. Fixed rod; 83. Sliding rod; 831. Conical structure; 84. Telescopic spring. Detailed Implementation

[0022] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0023] For 3D printing repair technology of automotive interiors, the first step is to use a coordinate measuring machine to perform a 3D scan of the surface of the workpiece to be repaired to obtain a 3D model of the workpiece. Then, the 3D model of the workpiece to be repaired is compared with the original 3D model of the workpiece to obtain the coordinates of the damaged location. The damaged location is then cut out and 3D printed using a 3D printer. Finally, the printed part is glued to the workpiece to complete the repair.

[0024] However, the repair process is quite complicated because it involves printing the damaged area with a 3D printer and then gluing it in place. In addition, the glue bonding creates tiny gaps between the repaired area and the workpiece, and the repaired area is prone to falling off.

[0025] The present invention provides a technical solution: like Figures 1 to 15As shown, a 3D printer worktable and a 3D printing side repair method include a 3D printer 1, a substrate 2, a drive motor 3, a flipping assembly 4, a worktable 5, a fixing mechanism 6, fixing wheels 71, a support assembly 7, and a support rod 8. The 3D printer 1 is equipped with a cutting device, and the substrate 2 is slidably mounted on the 3D printer 1 via a ball screw. The drive motor 3 is fixedly mounted on the substrate 2, and the drive motor 3 is equipped with the flipping assembly 4, which is connected to the worktable 5. The worktable 5 is rotatably connected to the substrate 2. The drive motor 3 drives the worktable 5 to flip on both sides via the flipping assembly 4, thereby achieving side repair. The worktable 5 has a circular array of fixing mechanisms 6, which are used to fix the workpiece. The substrate 2 is equipped with the support assembly 7, which is connected to the worktable 5 and to the support rod 8. When the worktable 5 flips, the worktable 5 drives the support rod 8 to slide and support the workpiece via the support assembly 7. Specifically, the 3D printer 1 is equipped with a cutting device, which is used to cut the damaged area. The cutting device consists of a robotic arm and a cutting tool. The robotic arm controls the cutting tool to move with multiple degrees of freedom to cut the damaged area. A base plate 2 is slidably mounted on the 3D printer 1 via a ball screw. The ball screw drives the base plate 2 to slide up and down, thereby adjusting the distance between the extruder and the base plate 2. A drive motor 3 is fixedly mounted on the base plate 2 and is fixedly connected to the base plate 2 by bolts. The drive motor 3 is equipped with a flipping component 4, which is connected to a worktable 5. The worktable 5 is rotatably connected to the base plate 2. The worktable 5 has symmetrical rotating shafts at both ends, and the base plate 2 has corresponding rotating slots. The worktable 5 is placed in the rotating slots through the rotating shafts to achieve a rotatable connection with the base plate 2. The drive motor 3 drives the worktable 5 to flip on both sides through the flipping component 4, so that the damaged area on the side of the workpiece faces the extruder of the 3D printer 1, which facilitates the extruder to extrude filament to repair the side of the workpiece. The drive motor 3 can rotate in both directions. Furthermore, the worktable 5 is driven by the flipping component 4 to achieve double-sided flipping, thereby increasing the freedom of repair processing and expanding the repair range. The flipping of the worktable 5 also drives the workpiece on the worktable 5 to flip synchronously, so that the side of the workpiece is opposite to the extrusion head, which facilitates the extrusion head to extrude wire to repair the workpiece. The worktable 5 has a ring array of fixing mechanisms 6, which are used to fix the workpiece and initially fix the workpiece, thereby facilitating the cutting device to cut the damaged area of ​​the workpiece. The base plate 2 is provided with a support component 7, which is connected to the worktable 5 and the support rod 8. When the worktable 5 flips, the worktable 5 drives the support rod 8 to slide and support the workpiece through the support component 7. When the worktable 5 flips, the workpiece flips synchronously with the worktable 5. Under the action of gravity and center of gravity, the workpiece will move along the worktable 5 to avoid sliding downward. At this time, the support component 7 drives the support rod 8 to fix the workpiece. The larger the flipping angle, the greater the fastening force of the support rod 8 on the workpiece. Preferably, the substrate 2 slides up and down via a ball screw, thereby driving the worktable 5 on it to slide synchronously, thereby adjusting the distance between the worktable 5 and the extrusion head and improving the working effect of the 3D printer 1; the robot and the cutting tool are existing technologies, specifically an industrial servo robot and a carbon steel cutting tool can be used, and the cutting tool is fixed on the robot and moves synchronously with the robot to achieve the cutting of the workpiece.

[0026] In this embodiment, there are four fixing mechanisms 6, which are arranged in pairs. Each fixing mechanism 6 is divided into a flipping group 61 and a limiting group 62. The flipping group 61 is provided with flipping components 4 on both sides, and the limiting group 62 is connected to the support component 7. The fixing mechanism 6 includes an electric push rod 63 and a pin 64. The electric push rod 63 is installed at the four ends of the worktable 5, and the pin 64 is fixedly installed on the electric push rod 63. Specifically, the flipping group 61 is located at both ends of the worktable 5, and the limiting group 62 is located at the middle of the worktable 5 and is arranged perpendicular to the flipping group 61. The electric push rod 63 is fixed to the worktable 5 by bolts, and then the ejector pin 64 is fixedly connected to the electric push rod 63. In the initial stage, the operator places the workpiece on the worktable 5 and then starts the electric push rod 63. The electric push rod 63 drives the ejector pin 64 to slide synchronously. The ejector pin 64 realizes the centering and fixing of the workpiece, which facilitates the cutting device to cut the damaged area. Preferably, the ejector pin 64 achieves point contact with the workpiece, thereby fixing workpieces of different shapes and improving the versatility of the 3D printer 1 in repair.

[0027] In this embodiment, the flipping mechanism includes a drive shaft 41, a bushing 42, a drive plate 43, a flipping wheel 44, and a fixed plate 45. The drive shaft 41 is fixedly installed with the drive motor 3. The drive shaft 41 is threaded, and the bushing 42 is slidably installed on the drive shaft 41. The bushing 42 has a threaded groove that mates with the drive shaft 41. Both ends of the bushing 42 are fixedly installed with the drive plate 43 via connecting rods. The drive plate 43 has symmetrically arranged gear teeth at both ends, and the flipping wheel 44 is symmetrically arranged between the gear teeth. The flipping wheel 44 is rotatably installed with the base plate 2 and fixedly installed with the worktable 5. Fixed plates 45 are installed at both ends of the drive plate 43. The fixed plate 45 is slidably connected to the base plate 2, and a support plate 452 is provided on one side of the fixed plate 45. Specifically, the drive shaft 41 is fixedly installed with the drive motor 3. The drive shaft 41 is threaded, and a bushing 42 is slidably installed on the drive shaft 41. The bushing 42 has a threaded groove that mates with the drive shaft 41. When the drive motor 3 rotates, it drives the drive shaft 41 to rotate synchronously. The drive shaft 41, through its threaded groove, presses against the threaded groove in the bushing 42, thus pushing the groove to slide horizontally. When the drive motor 3 rotates forward, it drives the bushing 41 to slide forward; when the drive motor 3 rotates in reverse, the bushing 42 slides backward. The two ends of the bushing 42 are fixedly installed with a drive plate 43 via connecting rods. The drive plate 43 has symmetrically arranged gear teeth at both ends. A symmetrical rotating wheel 44 is provided between the gear teeth; the rotating wheel 44 is rotatably mounted to the base plate 2 and fixedly mounted to the worktable 5. When the bushing 42 slides horizontally, it drives the drive plate 43 to move synchronously. The drive plate 43 drives the rotating wheel 44 in the moving direction of the shaft 41 to rotate through the gear teeth on it, and then drives the worktable 5 to rotate through the rotating wheel 44. Fixed plates 45 are installed at both ends of the drive plate 43. The fixed plate 45 is slidably connected to the base plate 2. A support plate 452 is provided on one side of the fixed plate 45. When the drive plate 43 slides, it drives the fixed plate 45 to move synchronously. The fixed plate 45 fixes the other end of the worktable 5, so that the worktable 5 can be deflected to repair the workpiece. Preferably, assuming that when the drive motor 3 rotates forward, the bushing 42 moves forward; when the drive motor 3 rotates forward, the drive motor 3 drives the drive shaft 41 to rotate synchronously, the drive shaft 41 slides horizontally forward, the bushing 42 drives the drive plate 43 to slide in the same direction, when the drive plate 43 slides forward, the drive plate 43 first drives the fixed plate 45 to move synchronously, the fixed plate 45 slides to fix the rotating shaft at the rear end of the worktable 5, thereby restricting the degree of freedom at the rear end of the worktable 5, then the drive plate 43 continues to slide forward, the gear teeth on the drive plate 43 mesh with the flipping wheel 44 at the rear end of the worktable 5, the flipping wheel 44 rotates, the flipping wheel 44 drives the worktable 5 to flip, the worktable 5 rotates around the rotating shaft at its own rear end as the axis, so that the side of the workpiece is no longer parallel to the extrusion head, thereby facilitating the extrusion head to repair the side of the workpiece; When the drive motor 3 reverses, the working principle is the same as above. At this time, the worktable 5 rotates around the front end as the axis.

[0028] In this embodiment, the fixing plate 45 is provided with a wavy texture 451, and the wavy texture 451 is tangent to the worktable 5; Specifically, the wavy texture 451 enhances the friction between the fixing plate 45 and the worktable 5, thereby improving the fixing effect on one end of the worktable 5 and thus improving the stability of the other end of the worktable 5 when flipped. The tangency between the wavy texture 451 and the worktable 5 ensures that the force exerted by the wavy texture on the worktable 5 always acts on the center position of the worktable 5, thereby making the worktable 5 stable under force and ensuring the fixing effect of the wavy texture on the worktable 5.

[0029] In this embodiment, the support assembly 7 includes a fixed wheel 71, a drive wheel 72, a transmission shaft 73, a driven wheel 74, a driven rack 75, a slide plate 76, and a lever 77. The fixed wheel 71 is symmetrically mounted above the base plate 2, and is located below the flipping assembly 61. The central axes of the fixed wheel 71 and the flipping wheel 44 are located on the same vertical plane. The drive wheel 72 is located above the fixed wheel 71, and is rotatably mounted to the worktable 5. The drive wheel 72 is fixedly mounted to the transmission shaft 73, and driven wheels 74 are mounted at both ends of the transmission shaft 73. A driven rack 75 is provided below the driven wheel 74; the driven rack 75 is slidably installed with the worktable 5, one end of the driven rack 75 is located outside the worktable 5 and contacts the support plate 452, and the other end of the driven rack 75 is fixedly installed with a slide plate 76; a sliding groove 761 is provided on the slide plate 76, and a support rod 8 is installed in the sliding groove 761. The front end of the support rod 8 is a conical structure 831; a lever 77 is provided on one side of the support rod 8, the lever 77 is fixedly connected to the support rod 8, and the lever 77 is fixedly installed with the pin 64 of the limiting group 62; Specifically, the fixed wheels 71 are symmetrically mounted above the base plate 2, located below the flipping assembly 61, with their central axes aligned on the same vertical plane as the flipping wheels 44. The drive wheel 72 is located above the fixed wheels 71 and is rotatably mounted to the worktable 5. When the worktable 5 flips, it drives the rotatably mounted drive wheel 72 to rotate synchronously. As the drive wheel 72 rotates, it meshes with the fixed wheels 71 below, causing the drive wheel 72 to rotate. The drive wheel 72 is fixedly mounted to the transmission shaft 73. Driven wheels 74 are mounted at both ends of the drive shaft 73. The drive wheel 72 rotates, thereby driving the drive shaft 73 to rotate synchronously. The drive shaft 73 drives the driven wheels 74 at both ends to rotate synchronously. A driven rack 75 is provided below the driven wheels 74. The driven rack 75 is slidably mounted on the worktable 5. A sliding groove is provided on the worktable 5. A slider is provided on the driven rack 75. The driven rack 75 achieves a sliding connection with the worktable 5 through the cooperation of the slider and the sliding groove. One end of the driven rack 75 is located on the outside of the worktable 5 and contacts the support plate 452. 2. The driven rack 75 is supported to ensure its stability during the rotation of the worktable 5. A slide plate 76 is fixedly installed on the other end of the driven rack 75. The slide plate 76 has a sliding groove 761, and a support rod 8 is installed in the sliding groove 761. The front end of the support rod 8 is a conical structure 831. The conical structure 831 enables point contact between the support rod 8 and the workpiece, thereby enhancing the fixing effect of the support rod 8 on the workpiece. When the driven wheel 74 rotates, it meshes with the driven rack 75, thereby driving the driven rack 75. When slippage occurs, the driven rack 75 drives the slide plate 76 to move synchronously, and the sliding causes the support plate 452 to move synchronously to fix the workpiece, preventing the worktable 5 from flipping and causing the workpiece to slip; a lever 77 is provided on one side of the support rod 8, the lever 77 is fixedly connected to the support rod 8, and the lever 77 is fixedly installed with the ejector pin 64 of the limit group 62. Initially, the electric push rod 63 of the limit group 62 drives the ejector pin 64 to move synchronously, and the ejector pin 64 pushes the support rod 8 to slide in the slide rod through the lever 77, so that the support rod 8 always coincides with the workpiece; Preferably, when the worktable 5 is flipped, the flipping end of the worktable 5 drives the drive wheel 72 to rotate synchronously, the drive shaft 41 rotates and meshes with the fixed wheel 71, thereby causing the drive wheel 72 to rotate. The rotation of the drive wheel 72 drives the transmission shaft 73 to rotate synchronously, the transmission shaft 73 drives the driven wheel 74 to rotate synchronously, the driven wheel 74 drives the driven rack 75 to slide, the driven rack 75 drives the slide plate 76 to move synchronously, and the slide plate 76 pushes the support rod 8 to enhance the fixing force on the workpiece.

[0030] In this embodiment, the support plate 452 has an arc surface 4521, and the driven rack 75 has a hemispherical structure 751 at one end on the outer side that cooperates with the arc surface 4521. Specifically, when the worktable 5 flips, the worktable 5 drives the driven rack 75 to move synchronously. The driven rack 75 and the support plate 452 rotate relative to each other. The support plate 452 ensures that the driven rack 75 is always in contact with the support plate 452 through the arc surface 4521, and the contact area between the driven rack 75 and the support plate 452 is enhanced by the hemispherical structure 751, so as to ensure the fixing effect of the support plate 452 on the driven rack 75.

[0031] Preferably, the height of the support rod 8 is lower than the height of the ejector pin 64 of the flipping assembly 61; the support rod 8 and the ejector pin 64 of the flipping assembly 61 form an isosceles triangle structure 81. Specifically, the three-point fixation of the support rod 8 and the ejector pin 64 improves the stability of the workpiece fixation. At the same time, the two legs of the isosceles triangle are of equal length, which allows the two legs to evenly distribute the external force when the support rod 8 and the ejector pin 64 are subjected to the downward sliding force of the workpiece, thus improving the stability of the workpiece fixation.

[0032] In this embodiment, the support rod 8 is divided into a fixed rod 82, a sliding rod 83 and a telescopic spring 84. The fixed rod 82 is slidably installed in the sliding groove 761. The sliding rod 83 is slidably installed in the fixed rod 82. The sliding rod 83 is connected to the fixed rod 82 through the telescopic spring 84. The top of the sliding rod 83 is a conical structure 831. Specifically, since the shape of the workpiece is not fixed, the gap between the workpiece and the support rod 8 varies. The overall length of the support rod 8 is adjusted by the telescopic spring 84 to fix the workpiece. Simultaneously, when the worktable 5 flips, the sliding rod 82 moves synchronously. Since the sliding rod 83 is already fixed to the workpiece, the fixed rod 82 compresses the telescopic spring 84, increasing the compression and reaction force. This enhances the pushing effect of the telescopic spring 84 on the sliding rod 83, thus strengthening the fixing force of the sliding rod 83 on the workpiece and ensuring its fixation. Furthermore, as the flipping angle increases, the sliding distance of the fixing plate 45 increases, the compression of the telescopic spring 84 increases, and the reaction force generated is greater, further increasing the fixing force on the workpiece. This achieves the effect of synchronously enhancing the workpiece fixing effect as the flipping angle increases, thus preventing the workpiece from shrinking due to a large initial fixing force or slipping due to a small fixing force.

[0033] In this embodiment, a retaining ring 771 is provided on the lever 77. The retaining ring 771 is connected to the fixed rod 82. The lever 77 is connected to the fixed rod 82 through the retaining ring 771, thereby driving the support rod 8 to move synchronously with the lever 77. This ensures that the support rod 8 always coincides with the workpiece. At the same time, the retaining ring 771 makes it easy to disassemble and replace the support rod 8. Different support rods 8 can be replaced according to the size of the workpiece to ensure the fixation effect on the workpiece.

[0034] A 3D printing method for side repair: Step 1: The workpiece is fixed on the worktable 5 by the fixing mechanism 6, and then three-dimensional scanning is performed; The fixing mechanism 6 fixes the workpiece on the worktable 5, and then the workpiece is three-dimensionally modeled by a coordinate measuring machine using existing technology. Then, the existing model of the workpiece is compared with the original model to determine the damaged area. Step 2: The cutting device cuts the damaged area of ​​the workpiece; When the coordinates of the damaged area are determined, the robotic arm on the cutting device moves, which in turn drives the fixedly installed blade to cut the damaged area; Step 3: 3D printer 1 repairs the workpiece using the extrusion head; After the cutting is completed, 3D printer 1 is started. 3D printer 1 melts and extrudes the filament through the extrusion head to repair the damaged area; Step 4: The flipping component 4 drives the worktable 5 to flip and adjust the position of the workpiece side. When it is necessary to repair the side of the workpiece, the drive motor 3 drives the worktable 5 to rotate through the flipping component 4, thereby adjusting the position of the workpiece on the worktable 5 so that the side of the workpiece is opposite to the extrusion head, making it easier for the extrusion head to repair the side. Step 5: The support component 7 is reinforced with support rods 8 to enhance the fixing effect; When the worktable 5 is flipped, the support assembly 7 enhances the fixing effect on the workpiece through the support rod 8, preventing the workpiece from slipping.

[0035] When using the 3D printer worktable of the present invention, the operator places the workpiece on the worktable 5, and then starts the electric push rod 63. The electric push rod 63 pushes the ejector pin 64 to slide synchronously, centering and fixing the workpiece. At the same time, the ejector pin 64 of the limit group 62 drives the lever 77 to move synchronously. The lever 77 drives the support rod 8 to slide synchronously. Then, the workpiece is three-dimensionally scanned by a coordinate measuring machine to determine the damaged area. Then, the damaged area of ​​the workpiece is cut by a cutting device. Then, the 3D printer 1 is started to repair the workpiece. Then, the positional relationship between the side of the workpiece and the extrusion head is adjusted by the worktable 5 to facilitate the repair by the 3D printer 1. When the worktable 5 needs to be deflected, the drive motor 3 starts, and the drive motor 3 drives the drive shaft 41 to rotate synchronously. The drive shaft 41 slides horizontally. When the drive plate 43 slides, it first drives the fixed plate 45 to move synchronously. The fixed plate 45 slides and fixes one end of the worktable 5, thereby restricting the degree of freedom of the worktable 5. Then, the drive plate 43 continues to slide forward. The gear teeth on the drive plate 43 mesh with the tilting wheel 44 at one end of the worktable 5. The tilting wheel 44 rotates and drives the worktable 5 to tilt. The tilting end of the worktable 5 drives the drive wheel 72 to rotate synchronously. The drive shaft 41 rotates and meshes with the fixed wheel 71, which in turn causes the drive wheel 72 to rotate. The rotation of the drive wheel 72 drives the transmission shaft 73 to rotate synchronously. The transmission shaft 73 drives the driven wheel 74 to rotate synchronously. The driven wheel 74 drives the driven rack 75 to slide. The driven rack 75 drives the slide plate 76 to move synchronously. The slide plate 76 pushes the support rod 8 to enhance the fixing force on the workpiece.

[0036] The foregoing has shown and described the basic principles, main features, and advantages of the present invention. Those skilled in the art should understand that the present invention is not limited to the above embodiments. The embodiments and descriptions in the specification are merely preferred examples and are not intended to limit the invention. Various changes and modifications can be made to the invention without departing from its spirit and scope, and all such changes and modifications fall within the scope of the present invention as claimed. The scope of protection of the present invention is defined by the appended claims and their equivalents.

Claims

1. A worktable for a 3D printer, characterized in that: Includes a 3D printer (1), a substrate (2), a drive motor (3), a flipping assembly (4), a worktable (5), a fixing mechanism (6), fixed wheels (71), a support assembly (7), and a support rod (8); The 3D printer (1) is equipped with a cutting device, and a substrate (2) is slidably mounted on the 3D printer (1) via a ball screw. A drive motor (3) is fixedly installed on the substrate (2). A flipping component (4) is provided on the drive motor (3). The flipping component (4) is connected to the worktable (5). The worktable (5) is rotatably connected to the substrate (2). The drive motor (3) drives the worktable (5) to flip on both sides through the flipping component (4) to achieve the repair of the side. The workbench (5) has a ring array of fixing mechanisms (6) for fixing the workpiece; The base plate (2) is provided with a support component (7), which is connected to the worktable (5) and the support component (7) is connected to the support rod (8). When the worktable (5) is flipped, the worktable (5) drives the support rod (8) to slide and support the workpiece through the support component (7).

2. The worktable for a 3D printer according to claim 1, characterized in that: There are four fixing mechanisms (6), and the four fixing mechanisms (6) are arranged in pairs to form a group. The fixing mechanism (6) is divided into a flipping group (61) and a limiting group (62). The flipping group (61) is provided with flipping components (4) on both sides, and the limiting group (62) is connected to the supporting component (7). The fixing mechanism (6) includes an electric push rod (63) and a pin (64). The electric push rod (63) is installed at the four ends of the workbench (5), and the pin (64) is fixedly installed on the electric push rod (63).

3. The worktable for a 3D printer according to claim 2, characterized in that: The flipping mechanism includes a drive shaft (41), a bushing (42), a drive plate (43), a flipping wheel (44), and a fixed plate (45). The drive shaft (41) is fixedly installed with the drive motor (3). The drive shaft (41) is threaded and a bushing (42) is slidably installed on the drive shaft (41). The bushing (42) has a threaded groove that mates with the drive shaft (41), and both ends of the bushing (42) are fixedly installed to the drive plate (43) via connecting rods; The drive plate (43) has symmetrical teeth at both ends, and a reversing wheel (44) is symmetrically provided between the teeth of the drive plate (43). The rotating wheel (44) is rotatably mounted to the base plate (2), and the rotating wheel (44) is fixedly mounted to the worktable (5); The drive plate (43) is equipped with fixing plates (45) at both ends; The fixing plate (45) is slidably connected to the base plate (2), and a support plate (452) is provided on one side of the fixing plate (45).

4. The worktable for a 3D printer according to claim 3, characterized in that: The fixed plate (45) is provided with a wave-shaped pattern (451), which is tangent to the worktable (5).

5. The worktable for a 3D printer according to claim 3, characterized in that: The support assembly (7) includes a fixed wheel (71), a drive wheel (72), a transmission shaft (73), a driven wheel (74), a driven rack (75), a sliding plate (76), and a lever (77). The fixed wheel (71) is symmetrically installed above the base plate (2). The fixed wheel (71) is located below the flipping group (61). The central axis of the fixed wheel (71) and the flipping wheel (44) are located in the same vertical plane. The drive wheel (72) is located above the fixed wheel (71), the drive wheel (72) is rotatably mounted to the worktable (5), and the drive wheel (72) is fixedly mounted to the transmission shaft (73); Driven wheels (74) are installed at both ends of the drive shaft (73); A driven rack (75) is provided below the driven wheel (74); The driven rack (75) is slidably installed on the worktable (5). One end of the driven rack (75) is located outside the worktable (5) and contacts the support plate (452). The other end of the driven rack (75) is fixedly installed with a sliding plate (76). The sliding plate (76) has a sliding groove (761) and a support rod (8) is installed in the sliding groove (761). The front end of the support rod (8) is a conical structure (831). The support rod (8) is provided with a lever (77) on one side. The lever (77) is fixedly connected to the support rod (8). The lever (77) is fixedly installed with the pin (64) of the limiting group (62).

6. The worktable for a 3D printer according to claim 5, characterized in that: The support plate (452) has an arc surface (4521) and the driven rack (75) has a hemispherical structure (751) at one end on the outer side that cooperates with the arc surface (4521).

7. The worktable for a 3D printer according to claim 5, characterized in that: The height of the support rod (8) is lower than the height of the pin (64) of the flipping group (61); the support rod (8) and the pin (64) of the flipping group (61) form an isosceles triangle structure (81).

8. The worktable for a 3D printer according to claim 7, characterized in that: The support rod (8) is divided into a fixed rod (82), a sliding rod (83) and a telescopic spring (84). The fixed rod (82) is slidably installed in the sliding groove (761). The sliding rod (83) is slidably installed in the fixed rod (82). The sliding rod (83) is connected to the fixed rod (82) through the telescopic spring (84). The top of the sliding rod (83) is a conical structure (831).

9. The worktable for a 3D printer according to claim 8, characterized in that: A retaining ring (771) is provided on the lever (77), and the retaining ring (771) is connected to the fixing rod (82).

10. A 3D printing side repair method, used on the 3D printing worktable according to any one of claims 1-9, characterized in that: Step 1: The workpiece is fixed on the worktable (5) by the fixing mechanism (6) and then three-dimensional scanning is performed; Step 2: The cutting device cuts the damaged area of ​​the workpiece; Step 3: The 3D printer (1) repairs the workpiece through the extrusion head; Step 4: The flipping component (4) drives the worktable (5) to flip and adjust the position of the workpiece side; Step 5: The support component (7) enhances the fixing effect through the support rod (8).

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