A light-cured 3D printing system for automotive hand plate parts

Abstract

The utility model discloses a kind of light-curing 3D printing systems of automobile hand plate parts, including printing bin, the inside of printing bin is provided with light-curing bin, the inside of light-curing bin is provided with resin box, the inside of printing bin is slidably connected with sliding plate, further including connecting mechanism;Connecting mechanism: it includes limit board, plug-in seat, fixed link, limit handle and torsion spring, the middle part of limit board is fixedly connected in sliding plate, plug-in seat is inserted in the front end of sliding plate outer surface, the rear side surface of plug-in seat and the front side surface of limit board are pasted, the lower end of plug-in seat is fixedly connected with printing plate, printing plate and resin box vertical correspondence, the front end of sliding plate is fixedly connected with fixed link, the light-curing 3D printing system of this automobile hand plate part, printing plate's quick stable installation can be realized, and it will not occur deviation after installation, guarantee the accuracy of automobile hand plate part light-curing 3D printing.

Description

Technical Field

[0001] This utility model relates to the field of automotive prototype manufacturing technology, specifically to a photopolymerization 3D printing system for automotive prototypes. Background Technology

[0002] Automotive prototypes are physical models used in the automotive development process to verify designs, test functions, and assess production feasibility. They are typically made of materials such as ABS, PP, and PMMA, and manufactured using technologies such as CNC machining and 3D printing. They have core values ​​such as shortening development cycles and reducing trial and error costs, and are widely used in scenarios such as component verification, vehicle model display, and design optimization. The photopolymer 3D printing system for automotive prototypes is an important piece of equipment for automotive prototype production.

[0003] Existing photopolymer 3D printing systems for automotive prototypes install and remove the printing plate by directly and tightly inserting it into a sliding plate. During the vertical movement of the printing plate, as the automotive prototype gradually takes shape, the center of gravity of the whole system consisting of the printing plate and the automotive prototype changes, which may affect the printing plate and the 3D printing accuracy of the automotive prototype, thereby affecting the testing results of the automotive prototype during the automotive development process. Utility Model Content

[0004] The technical problem to be solved by this utility model is to overcome the existing defects and provide a photopolymerization 3D printing system for automotive prototype parts. This system can achieve rapid and stable installation of the printing plate and will not shift after installation, thus ensuring the accuracy of photopolymerization 3D printing of automotive prototype parts and effectively solving the problems in the background art.

[0005] To achieve the above objectives, this utility model provides the following technical solution: a photopolymerization 3D printing system for automotive prototype parts, including a printing chamber, a photopolymerization chamber inside the printing chamber, a resin box inside the photopolymerization chamber, a sliding plate slidably connected inside the printing chamber, and a connecting mechanism.

[0006] The connecting mechanism includes a limiting plate, a connector, a fixing rod, a limiting handle, and a torsion spring. The limiting plate is fixedly connected to the middle of the sliding plate. A connector is inserted into the front end of the outer surface of the sliding plate. The rear surface of the connector is in contact with the front surface of the limiting plate. A printing plate is fixedly connected to the lower end of the connector. The printing plate and the resin box are vertically aligned. A fixing rod is fixedly connected to the front end of the sliding plate. A limiting handle is rotatably connected to the outer surface of the fixing rod. A disc is provided at the front end of the fixing rod. A torsion spring is fixedly connected between the front surface of the limiting handle and the rear surface of the disc. The torsion spring is movably sleeved on the outer surface of the fixing rod, which enables the printing plate to be installed quickly and stably without shifting after installation, ensuring the accuracy of the photopolymer 3D printing of automotive prototype parts.

[0007] Furthermore, the connecting mechanism also includes a fixed shaft, a connecting handle, and a connecting shaft. The fixed shaft is fixedly connected to the middle of the left and right sides of the limiting plate, and a connecting handle is rotatably connected to the middle of each fixed shaft. The front end of each connecting handle is provided with a connecting port. A connecting shaft is fixedly connected to the middle of the left and right sides of the plug-in base. The connecting shaft is installed in conjunction with the adjacent connecting port. A horizontal plate is fixedly connected to both ends of the limiting plate. The horizontal plate is installed in conjunction with the adjacent connecting handle, further realizing the longitudinal limiting of the plug-in base.

[0008] Furthermore, the printing chamber is equipped with a working chamber inside, and a controller is installed at the front end of the working chamber. The input terminal of the controller is electrically connected to an external power source to control various electrical components.

[0009] Furthermore, a transparent plate is provided at the bottom of both the photocuring chamber and the resin box. A laser machine is provided at the left end of the bottom wall of the working chamber, and an electric galvanometer is provided in the middle of the bottom wall of the working chamber. The transparent plates of the electric galvanometer are vertically aligned. The output end of the laser machine is electrically connected to the output end of the electric galvanometer. The input ends of both the laser machine and the electric galvanometer are electrically connected to the output end of the controller, providing a light source for the photocuring of the resin.

[0010] Furthermore, a guide rail is fixedly connected to the middle of the inner wall of the rear side of the printing chamber. The interior of the guide rail is slidably connected to the rear end of the sliding plate. A screw is rotatably connected to the interior of the guide rail. The middle of the screw is threadedly connected to the rear end of the sliding plate. A motor is installed at the rear end of the upper surface of the working chamber. The upper end of the motor output shaft is fixedly connected to the lower end of the screw. Corrugated tubes are installed between the upper surface of the sliding plate and the top wall of the printing chamber, and between the lower surface of the sliding plate and the bottom wall of the printing chamber. The corrugated tubes are all sleeved on the outer surface of the screw. A laser reflective surface is installed in the middle of the upper surface of the sliding plate. A laser range sensor is installed at the rear end of the top wall of the printing chamber. The laser range sensor and the laser reflective surface are vertically aligned. The laser range sensor and the controller are bidirectionally electrically connected. The input end of the motor is electrically connected to the output end of the controller, thereby realizing the vertical movement of the printing plate.

[0011] Furthermore, the resin box has scale bars on both the front and rear inner walls to display the amount of resin.

[0012] Furthermore, a fan trough is provided at the rear end of the working chamber, and heat dissipation holes are provided at both the left and right ends of the working chamber. A fan is installed inside the fan trough, and the input end of the fan is electrically connected to the output end of the controller to realize heat dissipation of the components inside the working chamber.

[0013] Furthermore, a transparent cover is provided on the front side of the printing chamber, and a uniformly distributed connecting plate is fixedly connected to the rear end of the upper surface of the transparent cover. The rear end of each connecting plate is provided with a locking hole. A uniformly distributed fixing post is fixedly connected to the upper surface of the printing chamber, and each fixing post is inserted into the adjacent locking hole to achieve protection of the printing unit.

[0014] Compared with the prior art, the beneficial effects of this utility model are as follows: This photopolymerization 3D printing system for automotive prototype parts has the following advantages:

[0015] The longitudinal positioning of the connector is achieved by inserting the connector of the connecting handle into the connecting shaft. At the same time, the limiting handle further ensures the stability of the longitudinal positioning of the connector. Meanwhile, the horizontal plate provides a limit for the connecting handle, so that the connecting handle remains horizontal when locked. This enables the rapid and stable installation of the printing plate. Compared with the installation of the printing plate by simply inserting it, the printing plate will not shift after installation, ensuring the accuracy of photopolymer 3D printing of automotive prototype parts. Attached Figure Description

[0016] Figure 1 This is a schematic diagram of the structure of this utility model;

[0017] Figure 2 This is a cross-sectional view of the internal structure of this utility model;

[0018] Figure 3 This is a cross-sectional view of the rear side of the present invention;

[0019] Figure 4 This is an enlarged structural diagram of point A in this utility model.

[0020] In the diagram: 1. Printing chamber, 2. Curing chamber, 3. Resin box, 4. Sliding plate, 5. Printing plate, 6. Connecting mechanism, 61. Limiting plate, 62. Socket, 63. Fixing rod, 64. Limiting handle, 65. Torsion spring, 66. Fixing shaft, 67. Connecting handle, 68. Connecting shaft, 7. Guide rail, 8. Screw, 9. Bellows, 10. Motor, 11. Laser machine, 12. Electric galvanometer, 13. Working chamber, 14. Controller, 15. Scale bar, 16. Fan slot, 17. Fan, 18. Transparent cover, 19. Connecting plate, 20. Fixing column, 21. Laser rangefinder sensor, 22. Laser reflector. Detailed Implementation

[0021] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0022] Please see Figure 1-4This embodiment provides a technical solution: a photopolymerization 3D printing system for automotive prototype parts, including a printing chamber 1, a photopolymerization chamber 2 inside the printing chamber 1, a resin box 3 inside the photopolymerization chamber 2, and scale strips 15 on the inner walls of the front and rear sides of the resin box 3. Resin is injected into the resin box 3. Under the guidance of the scale strips 15, when the resin is added to a specified capacity, the resin injection stops. A sliding plate 4 is slidably connected inside the printing chamber 1. A working chamber 13 is provided inside the printing chamber 1. A controller 14 is provided at the front end of the working chamber 13. The input terminal of the controller 14 is electrically connected to an external power supply. It also includes a connecting mechanism 6.

[0023] Connection mechanism 6 includes a limiting plate 61, a connector 62, a fixing rod 63, a limiting handle 64, and a torsion spring 65. The limiting plate 61 is fixedly connected to the middle of the sliding plate 4. The connector 62 is inserted into the front end of the outer surface of the sliding plate 4. The rear surface of the connector 62 is in contact with the front surface of the limiting plate 61. The lower end of the connector 62 is fixedly connected to a printing plate 5. The printing plate 5 and the resin box 3 are vertically aligned. The front end of the sliding plate 4 is fixedly connected to a fixing rod 63. The outer surface of the fixing rod 63 is rotatably connected to a limiting handle 64. A disc is provided at the front end of the fixing rod 63. The torsion spring 65 is fixedly connected between the front surface of the limiting handle 64 and the rear surface of the disc. The torsion spring 65 is movably sleeved on the outer surface of the fixing rod 63. (The disc can be inserted into the front surface of the fixing rod 63.) The connection mechanism 6 includes a threaded connection. The rear pin of the torsion spring 65 can be engaged with the front end of the limiting handle 64 via a snap fastener, and the front pin of the torsion spring 65 can be engaged with the rear end of the disc via a snap fastener. The disc is periodically screwed out, and then both the front and rear pins of the torsion spring 65 are engaged. The torsion spring 65 is then moved from back to front off the outer surface of the fixing rod 63. A new torsion spring 65 is then fitted onto the outer surface of the fixing rod 63 from front to back. The front and rear pins of the spring 65 are engaged with the front end of the limiting handle 64 and the rear end of the disc via corresponding snap fasteners. The disc is then screwed back onto the front end of the fixing rod 63. This allows for the periodic replacement of the torsion spring 65, preventing its aging from affecting the limiting stability of the connector 62. The connecting mechanism 6 also includes a fixed shaft 66 and a connecting... The connecting handle 67 and connecting shaft 68, and the fixed shaft 66 are respectively fixedly connected to the middle of the left and right sides of the limiting plate 61. The middle of the fixed shaft 66 is rotatably connected to the connecting handle 67, and the front end of the connecting handle 67 is provided with a connecting port. The middle of the left and right sides of the insertion seat 62 is fixedly connected to the connecting shaft 68, and the connecting shaft 68 is installed with the adjacent connecting port. The left and right ends of the limiting plate 61 are fixedly connected to the horizontal plates, and the horizontal plates are installed with the adjacent connecting handle 67. The insertion seat 62 is inserted into the front end of the outer surface of the sliding plate 4 until the rear surface of the insertion seat 62 and the front surface of the limiting plate 61 are in contact. Before insertion, the operator rotates the limiting handle 64. The limiting handle 64 rotates 90 degrees around the central axis of the fixed rod 63. The limiting handle 64 will not... The insertion of the connector 62 is affected by the rotation of the limiting handle 64, which causes the torsion spring 65 to exert a torsional force. When the rear surface of the connector 62 is in contact with the front surface of the limiting plate 61, the limiting handle 64 stops being limited. The elastic force of the torsion spring 65 reacts to the limiting handle 64, causing it to rotate 90 degrees in the opposite direction. The rear surface of the limiting handle 64 then contacts the front surface of the connector 62. Then, the operator rotates the two connecting handles 67 forward. Each connecting handle 67 rotates forward around the central axis of the adjacent fixed shaft 66, and the connecting ports of the connecting handles 67 are inserted into the adjacent connecting shaft 68, further achieving longitudinal limiting of the connector 62. Simultaneously, the horizontal plate provides support for the connecting handles 67, keeping them in a horizontal position, thus enabling the rapid and stable installation of the printing plate 5.Furthermore, it will not experience any vertical positional shift due to changes in its own center during vertical movement;

[0024] The bottom of the light curing chamber 2 and the resin box 3 are both equipped with transparent plates. The left end of the bottom wall of the working chamber 13 is equipped with a laser machine 11. The middle of the bottom wall of the working chamber 13 is equipped with an electric galvanometer 12. The transparent plates of the electric galvanometer 12 are vertically aligned. The output end of the laser machine 11 is electrically connected to the output end of the electric galvanometer 12. The input ends of the laser machine 11 and the electric galvanometer 12 are both electrically connected to the output end of the controller 14.

[0025] The printing chamber 1 has a guide rail 7 fixedly connected to the middle of its rear inner wall. The guide rail 7 is slidably connected to the rear end of the sliding plate 4. A screw 8 is rotatably connected to the guide rail 7. The middle of the screw 8 is threadedly connected to the rear end of the sliding plate 4. A motor 10 is installed at the rear end of the upper surface of the working chamber 13. The upper end of the output shaft of the motor 10 is fixedly connected to the lower end of the screw 8. Corrugated tubes 9 are installed between the upper surface of the sliding plate 4 and the top wall of the printing chamber 1, and between the lower surface of the sliding plate 4 and the bottom wall of the printing chamber 1. The corrugated tubes 9 are all sleeved on the outer surface of the screw 8. (During the movement of the sliding plate 4, the corrugated tubes 9 extend or contract accordingly.) (Providing sealing protection for screw 8), a laser reflective surface 22 is provided in the middle of the upper surface of the sliding plate 4, and a laser range sensor 21 is provided at the rear end of the top wall of the printing chamber 1. The laser range sensor 21 and the laser reflective surface 22 are vertically aligned. The laser range sensor 21 and the controller 14 are bidirectionally electrically connected. The input end of the motor 10 is electrically connected to the output end of the controller 14. The controller 14 enables the motor 10 to operate. The rotation of the output shaft of the motor 10 drives the screw 8 to rotate. The rotation of the screw 8 causes the rear end of the sliding plate 4 to move downward inside the guide rail 7, thereby driving the printing plate 5 to move downward. At the same time, the controller 14 realizes laser range measurement. When sensor 21 operates, the laser probe of laser rangefinder 21 emits laser light towards laser reflector 22. Based on the speed of light and the time it takes for the laser light to reflect back to the laser probe, the real-time distance *b* between the upper surface of sliding plate 4 and the top wall of printing chamber 1 is calculated. The distance *d* between the upper surface of sliding plate 4 and the lower surface of printing plate 5, and the distance *a* between the top wall of printing chamber 1 and the bottom wall of resin box 3 are also calculated. Let *c* be the distance between the lower surface of printing plate 5 and the bottom wall of resin box 3, where *c* = *abd*. Since *a* and *d* are constants, *c* and *b* have a linear relationship. The real-time value of *c* can be obtained by measuring *b*. Laser rangefinder 21 transmits *b* in real time. The signal is sent to the signal receiving end of the controller 14. The reference value of c is set according to the liquid sampling standard. When the real-time c is equal to the reference value, the controller 14 shuts down the motor 10 and starts the laser machine 11. The laser machine 11 emits a laser of a specified frequency. At the same time, the controller 14 starts the electric galvanometer 12. The electric galvanometer 12 controls the laser beam generated by the laser machine 11 to scan the resin surface point by point and solidify it according to the slice outline. At the same time, the controller 14 starts the motor 10 to rotate in reverse, so that the printing plate 5 moves upward. Several slices of the car prototype are stacked after solidification to form a complete car prototype, thereby realizing the photopolymerization 3D printing of the car prototype.

[0026] The working chamber 13 is equipped with a fan trough 16 at its rear end (a filter screen can be connected to the rear side of the fan trough 16 by screws to prevent external impurities from entering the working chamber 13). The left and right ends of the working chamber 13 are equipped with evenly distributed heat dissipation holes. A fan 17 is installed inside the fan trough 16. The input end of the fan 17 is electrically connected to the output end of the controller 14. The controller 14 enables the fan 17 to run. The fan 17 draws out the air inside the working chamber 13, while external air enters the working chamber 13 through the evenly distributed heat dissipation holes, thereby accelerating the air exchange between the inside and outside of the working chamber 13 and thus achieving heat dissipation for the laser machine 11 and the electric galvanometer 12.

[0027] Wherein: A transparent cover 18 is provided on the front side of the printing chamber 1. A connecting plate 19 is fixedly connected to the rear end of the upper surface of the transparent cover 18. A locking hole is provided at the rear end of each connecting plate 19. A fixing post 20 is fixedly connected to the upper surface of the printing chamber 1. The fixing post 20 is inserted into the adjacent locking hole. The transparent cover 18 is placed from top to bottom at the front end of the printing chamber 1, so that the locking holes at the rear end of the connecting plate 19 are inserted into the adjacent fixing post 20.

[0028] The working principle of the photopolymerization 3D printing system for automotive prototype parts provided by this utility model is as follows: During operation, the operator first stably places the printing chamber 1, the photopolymerization chamber 2, and other mechanisms in a horizontal working area. After stable placement, the operator inserts the connector 62 into the front end of the outer surface of the sliding plate 4 until the rear surface of the connector 62 is in contact with the front surface of the limiting plate 61. Before insertion, the operator rotates the limiting handle 64. The limiting handle 64 rotates 90 degrees around the central axis of the fixing rod 63. The limiting handle 64 does not affect the insertion of the connector 62. The rotation of the limiting handle 64 causes the torsion spring 65 to exert a torque. When the rear surface of the connector 62 is in contact with the front surface of the limiting plate 61, the limiting of the limiting handle 64 is stopped, and the elastic force of the torsion spring 65 reacts to... The limiting handle 64 rotates 90 degrees in the opposite direction, and its rear surface mates with the front surface of the connector 62. Then, the operator rotates the two connecting handles 67 forward. Each connecting handle 67 rotates forward around the central axis of the adjacent fixed shaft 66, and the connecting ports of the connecting handles 67 are inserted into the adjacent connecting shaft 68, further achieving longitudinal positioning of the connector 62. Simultaneously, the horizontal plate provides support for the connecting handles 67, keeping them horizontal, thus enabling rapid and stable installation of the printing plate 5 without longitudinal displacement due to changes in its center during vertical movement. Then, the operator injects resin into the resin box 3. Guided by the scale on the graduated strip 15, the injection stops when the resin reaches the specified capacity. The operator places the transparent cover 18 from top to bottom at the front end of the printing chamber 1, ensuring that the locking ports at the rear end of the connecting plate 19 are engaged with the adjacent fixing posts 20. Then, the controller 14 activates the motor 10, whose output shaft rotates, causing the screw 8 to rotate. The rotation of the screw 8 causes the rear end of the sliding plate 4 to move downwards inside the guide rail 7, thereby moving the printing plate 5 downwards. Simultaneously, the controller 14 activates the laser rangefinder 21. The laser probe of the laser rangefinder 21 emits laser light towards the laser reflector 22. Based on the speed of light and the time it takes for the laser to reflect back to the laser probe, the real-time distance b between the upper surface of the sliding plate 4 and the top wall of the printing chamber 1 is calculated. The distance d between the upper surface of the sliding plate 4 and the lower surface of the printing plate 5 is also calculated. The distance between the top wall of the printing chamber 1 and the resin... The distance between the bottom walls of the resin box 3 is 'a'. Let the distance between the lower surface of the printing plate 5 and the bottom wall of the resin box 3 be 'c', where c = abd. Since a and d are constants, c and b have a linear relationship. The real-time value of c can be obtained by measuring b. The laser rangefinder 21 sends b to the signal receiver of the controller 14 in real time. A reference value for c is set according to the liquid sampling standard. When the real-time c equals the reference value, the controller 14 shuts down the motor 10. At this time, the lower surface of the printing plate 5 contacts the resin. Then, the controller 14 activates the laser machine 11, which emits a laser of a specified frequency. Simultaneously, the controller 14 activates the electric galvanometer 12, which controls the laser beam generated by the laser machine 11 to scan the resin surface point by point, solidifying it according to the slice outline.Simultaneously, controller 14 reverses the rotation of motor 10, causing printing plate 5 to move upwards. Several slices of the automotive prototype accumulate after curing, forming a complete automotive prototype, thus achieving photopolymerization 3D printing of the automotive prototype. At the same time, controller 14 activates fan 17, which draws air out of the working chamber 13, while external air enters the working chamber 13 through evenly distributed heat dissipation holes, accelerating air exchange between the inside and outside of the working chamber 13, thereby cooling the laser machine 11 and the motorized galvanometer 12.

[0029] It is worth noting that the controller 14 disclosed in the above embodiments can be an S7-1200, the laser machine 11 can be a diode-pumped solid-state laser, the motorized galvanometer 12 can be a high-speed galvanometer from HI 600, and the laser rangefinder 21 can be a TOF-DL250AM12. The controller 14 controls the operation of the motor 10, the laser machine 11, the motorized galvanometer 12, the fan 17, and the laser rangefinder 21 using methods commonly used in the prior art.

[0030] The above description is merely an embodiment of this utility model and does not limit the patent scope of this utility model. Any equivalent structural or procedural transformations made based on the content of this utility model specification and drawings, or direct or indirect applications in other related technical fields, are similarly included within the patent protection scope of this utility model.

Claims

1. A photopolymerization 3D printing system for automotive prototype parts, comprising a printing chamber (1), a photopolymerization chamber (2) disposed inside the printing chamber (1), a resin box (3) disposed inside the photopolymerization chamber (2), and a sliding plate (4) slidably connected inside the printing chamber (1), characterized in that: It also includes a connecting mechanism (6); The connecting mechanism (6) includes a limiting plate (61), a plug-in seat (62), a fixing rod (63), a limiting handle (64), and a torsion spring (65). The limiting plate (61) is fixedly connected to the middle of the sliding plate (4). The plug-in seat (62) is inserted into the front end of the outer surface of the sliding plate (4). The rear surface of the plug-in seat (62) is in contact with the front surface of the limiting plate (61). The lower end of the plug-in seat (62) is fixedly connected to the printing plate (5). The printing plate (5) and the resin box (3) are vertically aligned. The front end of the sliding plate (4) is fixedly connected to the fixing rod (63). The outer surface of the fixing rod (63) is rotatably connected to the limiting handle (64). The front end of the fixing rod (63) is provided with a disc. The torsion spring (65) is fixedly connected between the front surface of the limiting handle (64) and the rear surface of the disc. The torsion spring (65) is movably sleeved on the outer surface of the fixing rod (63).

2. The photopolymerization 3D printing system for automotive prototype parts according to claim 1, characterized in that: The connecting mechanism (6) further includes a fixed shaft (66), a connecting handle (67), and a connecting shaft (68). The fixed shaft (66) is fixedly connected to the middle of the left and right sides of the limiting plate (61). The middle of the fixed shaft (66) is rotatably connected to the connecting handle (67). The front end of the connecting handle (67) is provided with a connecting port. The middle of the left and right sides of the plug-in seat (62) is fixedly connected to the connecting shaft (68). The connecting shaft (68) is installed in cooperation with the adjacent connecting port. The left and right ends of the limiting plate (61) are fixedly connected to the horizontal plate. The horizontal plate is installed in cooperation with the adjacent connecting handle (67).

3. The photopolymerization 3D printing system for automotive prototype parts according to claim 1, characterized in that: The printing chamber (1) is equipped with a working chamber (13) inside, and a controller (14) is provided at the front end of the working chamber (13). The input terminal of the controller (14) is electrically connected to an external power source.

4. The photopolymerization 3D printing system for automotive prototype parts according to claim 3, characterized in that: The bottom of the photocuring chamber (2) and the resin box (3) are both equipped with transparent plates. A laser machine (11) is installed at the left end of the bottom wall of the working chamber (13). An electric galvanometer (12) is installed in the middle of the bottom wall of the working chamber (13). The transparent plates of the electric galvanometer (12) are vertically aligned. The output end of the laser machine (11) is electrically connected to the output end of the electric galvanometer (12). The input ends of the laser machine (11) and the electric galvanometer (12) are both electrically connected to the output end of the controller (14).

5. The photopolymerization 3D printing system for automotive prototype parts according to claim 3, characterized in that: A guide rail (7) is fixedly connected to the middle of the inner rear wall of the printing chamber (1). The interior of the guide rail (7) is slidably connected to the rear end of the sliding plate (4). A screw (8) is rotatably connected to the interior of the guide rail (7). The middle of the screw (8) is threadedly connected to the rear end of the sliding plate (4). A motor (10) is installed at the rear end of the upper surface of the working chamber (13). The upper end of the output shaft of the motor (10) is fixedly connected to the lower end of the screw (8). The upper surface of the sliding plate (4) and the top wall of the printing chamber (1) are connected to the lower end of the sliding plate (4). A corrugated pipe (9) is provided between the surface and the bottom wall of the printing chamber (1). The corrugated pipe (9) is sleeved on the outer surface of the screw (8). A laser reflective surface (22) is provided in the middle of the upper surface of the sliding plate (4). A laser range sensor (21) is provided at the rear end of the top wall of the printing chamber (1). The laser range sensor (21) and the laser reflective surface (22) are vertically aligned. The laser range sensor (21) and the controller (14) are bidirectionally electrically connected. The input end of the motor (10) is electrically connected to the output end of the controller (14).

6. The photopolymerization 3D printing system for automotive prototype parts according to claim 1, characterized in that: The resin box (3) has scale strips (15) on both the front and rear inner walls.

7. The photopolymerization 3D printing system for automotive prototype parts according to claim 3, characterized in that: The working chamber (13) is provided with a fan trough (16) at the rear end. The working chamber (13) is provided with evenly distributed heat dissipation holes at both the left and right ends. A fan (17) is provided inside the fan trough (16). The input end of the fan (17) is electrically connected to the output end of the controller (14).

8. The photopolymerization 3D printing system for automotive prototype parts according to claim 1, characterized in that: A transparent cover (18) is provided on the front side of the printing chamber (1). A uniformly distributed connecting plate (19) is fixedly connected to the rear end of the upper surface of the transparent cover (18). A locking hole is provided at the rear end of each connecting plate (19). A uniformly distributed fixing post (20) is fixedly connected to the upper surface of the printing chamber (1). Each fixing post (20) is inserted into the adjacent locking hole.

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