Automatic push plate discharging mechanism of 3D printing equipment

Abstract

The invention discloses an automatic plate pushing and discharging mechanism of 3D printing equipment, which is characterized in that a plate feeding slide way and a plate discharging slide way for a forming bottom plate to slide are respectively arranged on a plate feeding bearing table and a plate discharging bearing table on the left side and the right side of the 3D printing equipment, and the plate feeding slide way and the plate discharging slide way can be respectively aligned with a forming piston exposed outside on the 3D printing equipment; a movable push plate and a dragging plate are slidably mounted on the plate feeding slide way and the plate discharging slide way correspondingly, the push plate driving device and the dragging driving device drive the movable push plate and the dragging plate to slide correspondingly, and the movable push plate can abut against a forming bottom plate on the plate feeding slide way to slide forwards to a forming piston of the 3D printing equipment. And the working hook on the side wall of the dragging plate can hook the hooking structure on the side wall of the forming bottom plate so as to drive the forming bottom plate on a forming piston of the 3D printing equipment to slide away from the 3D printing equipment along the plate discharging slide way, automatic plate feeding and automatic plate discharging for part taking of the 3D printing equipment are achieved, and the 3D printing production efficiency is improved.

Description

Technical Field

[0001] The present invention relates to the technical field of 3D laser printing, and particularly relates to an automatic push plate part discharging mechanism of a 3D printing device. Background Art

[0002] At present, before a 3D printing device performs powder cleaning and part taking operations, it is necessary to first move the forming cylinder together with the forming piston, the formed part, and the residual powder therein outside the 3D printing device. Then, the forming cylinder descends to expose the residual powder and the formed part. First, the worker performs powder cleaning, and then part taking. After part taking is completed, the forming cylinder resets and returns to the 3D printing device. This method of powder cleaning and part taking in 3D printing seriously affects the production efficiency of 3D printing. With the popularization of metal 3D printing, automated production has become a common concern. In particular, how to achieve rapid powder cleaning and part taking in a 3D printing device without the need to horizontally move the forming cylinder has become a technical problem that urgently needs to be solved. The metal parts printed by 3D printing are often relatively heavy, and ordinary robotic arms cannot enter the 3D printing device to take parts. Therefore, it has caused great trouble to the automatic part taking of current 3D printing devices. Summary of the Invention

[0003] In order to make up for the above deficiencies, the present invention provides an automatic push plate part discharging mechanism of a 3D printing device. The automatic push plate part discharging mechanism of the 3D printing device realizes automatic part taking and replacement of the forming bottom plate in the 3D printing device without the need for horizontal movement of the forming cylinder, and solves the problem of part taking in the automated production of 3D printing.

[0004] The technical solution adopted by the present invention to solve its technical problems is as follows: An automatic push plate part discharging mechanism for a 3D printing device, comprising a forming bottom plate, a feeding plate bearing platform, a discharging plate bearing platform, a moving push plate, a dragging plate, a push plate driving device, a dragging driving device and a control system. The feeding plate bearing platform and the discharging plate bearing platform are respectively arranged on the left and right sides of the 3D printing device. A feeding plate slideway and a discharging plate slideway for the forming bottom plate to slide are respectively arranged on the feeding plate bearing platform and the discharging plate bearing platform. The feeding plate slideway and the discharging plate slideway can respectively be directly aligned with the forming piston exposed on the 3D printing device. The moving push plate is slidably installed on the feeding plate slideway, and the dragging plate is slidably installed on the discharging plate slideway. The push plate driving device and the dragging driving device respectively drive the moving push plate and the dragging plate to reciprocally slide along the feeding plate slideway and the discharging plate slideway. The moving push plate can push the forming bottom plate on the feeding plate slideway forward and finally reach the forming piston of the 3D printing device. A hook-up structure is arranged on the side wall of the forming bottom plate facing the discharging plate bearing platform. A working hook is arranged on one side of the dragging plate facing the 3D printing device. The working hook can hook the hook-up structure on the forming bottom plate, and then drive the forming bottom plate on the forming piston of the 3D printing device to slide away from the 3D printing device along the discharging plate slideway. The control system controls the start and stop of the push plate driving device, the dragging driving device and the 3D printing device.

[0005] As a further improvement of the invention, the working hook is hinged on the dragging plate so as to be able to rotate by a set angle around a horizontal rotating shaft. The working hook forms a hook body and a linkage arm on both sides of the rotating shaft respectively. The hook body can hook the hook-up structure of the forming bottom plate, and the weight difference between the self-weight of the hook body and the weight of the linkage arm enables the working hook to always maintain the state of being hooked with the hook-up structure without external force. The hook-up structure on the forming bottom plate includes a notch groove structure arranged on the side wall of the forming bottom plate facing the discharging plate bearing platform and a horizontal cross beam arranged in the notch groove structure. The hook body of the working hook can hook the horizontal cross beam through the opening of the notch groove structure. When the working hook slides towards the 3D printing device along with the dragging plate, the hook body first contacts the horizontal cross beam through an inclined surface or an arc surface, and then forces the working hook to rotate to a position allowing the horizontal cross beam to enter the hook body. A dragging hook separator is further installed on the discharging plate bearing platform. When the dragging plate pulls the forming bottom plate to slide towards the outside of the 3D printing device to a specified position, the linkage arm of the working hook on the dragging plate reaches the working position of the dragging hook separator, and the dragging hook separator forces the linkage arm of the working hook to rotate, so that the hook body of the working hook is disengaged from the hook-up structure on the forming bottom plate.

[0006] As a further improvement of the invention, the dragging hook separator is fixedly installed on the discharging plate bearing platform. The dragging hook separator is provided with an inclined contact surface. The linkage arm can gradually contact the inclined contact surface on the dragging hook separator as the dragging plate slides and slide along the inclined contact surface.

[0007] As a further improvement of the invention, a feeding induction device for sensing whether there is a formed bottom plate in the feeding slideway and a push plate induction device for sensing the position of the moving push plate are provided on the feeding carrier table. A picking induction device for sensing whether there is a formed bottom plate in the discharging slideway and a pulling induction device for sensing the position of the pulling plate are provided on the discharging slideway. The feeding induction device, the push plate induction device, the picking induction device and the pulling induction device are respectively in communication with the control system to transmit induction signals.

[0008] As a further improvement of the invention, a guiding and positioning column is fixedly installed on a side wall of the moving push plate facing the 3D printing device. A guiding and positioning hole is provided on a side wall of the formed bottom plate facing the feeding carrier table. The guiding and positioning column on the moving push plate can be inserted into the guiding and positioning hole on the formed bottom plate to limit the sliding direction of the formed bottom plate.

[0009] As a further improvement of the invention, a push plate positioning block protruding from its surface is fixedly provided on the moving push plate. A feeding limit stop block is fixedly provided on the feeding carrier table. When the moving push plate slides towards the 3D printing device to a specified position, the push plate positioning block on the moving push plate stops against the surface of the feeding limit stop block, so that the moving push plate stops at the specified position.

[0010] As a further improvement of the invention, a feeding guiding groove is provided on the side wall of the feeding slideway, and a discharging guiding groove is provided on the side wall of the discharging slideway. A feeding guiding strip that can slide and is inserted into the feeding guiding groove is provided on the side wall of the moving push plate, and a pulling guiding strip that can slide and is inserted into the discharging guiding groove is provided on the side wall of the pulling plate.

[0011] As a further improvement of the invention, the push plate driving device includes a pushing motor reduction unit and a pushing gear, and the pulling driving device includes a pulling motor reduction unit and a pulling gear. A pushing rack is provided on the feeding slideway, and a pulling rack is provided on the discharging slideway. The pushing gear meshes with the pushing rack for transmission, and the pulling gear meshes with the pulling rack for transmission. The control system controls the start-stop and forward-reverse rotation of the pushing motor reduction unit and the pulling motor reduction unit.

[0012] As a further improvement of the invention, on a section of the feeding slideway close to the 3D printing device, a feeding roller capable of rotating around a horizontal rotating shaft is provided. On a section of the discharging slideway close to the 3D printing device, a discharging roller capable of rotating around a horizontal rotating shaft is provided. On the feeding carrier platform, a driving sprocket capable of rotating around a horizontal rotating shaft is installed. On the discharging carrier platform, a dragging sprocket capable of rotating around a horizontal rotating shaft is installed. On each feeding roller, a driving sprocket is coaxially and fixedly installed. On the discharging roller, a dragging sprocket is coaxially and fixedly installed. A driving chain is sleeved on each driving sprocket in a meshing manner. A dragging chain is sleeved on each dragging sprocket in a meshing manner. The moving push plate and the driving chain are connected through a connecting piece, so that the feeding roller rotates synchronously with the movement of the moving push plate. The dragging plate and the dragging chain are connected through a connecting piece, so that the discharging roller rotates synchronously with the movement of the dragging plate. The forming bottom plate can be placed on the feeding roller and the discharging roller.

[0013] As a further improvement of the invention, a magnetic attracting plate is fixedly embedded on the bottom surface of the forming bottom plate. An electromagnet is fixedly embedded in the forming piston of the 3D printing device. After the electromagnet is powered on, it can be magnetically attracted to the magnetic attracting plate on the forming bottom plate. A powder scraping strip is also fixedly installed at the bottom on one side of the forming bottom plate facing the discharging carrier platform. The powder scraping strip can scrape the residual powder on the surface of the forming piston during the process of the forming bottom plate entering the 3D printing device.

[0014] The beneficial technical effects of the present invention are as follows: By respectively installing a feeding carrier platform and a discharging carrier platform on the left and right sides of the 3D printing device, and respectively arranging a feeding slideway and a discharging slideway thereon, the moving push plate and the dragging plate are respectively driven to reciprocally slide on the feeding slideway and the discharging slideway through a push plate driving device and a dragging driving device. The new forming bottom plate is pushed onto the forming piston in the 3D printing device by the moving push plate. The working hook on the dragging plate hooks the hooking structure on the side wall of the forming bottom plate, and the forming bottom plate on the forming piston and the formed workpiece thereon are dragged out of the 3D printing device together, thereby realizing the automatic loading and unloading of the 3D printing device. The present invention can realize the intelligent full-automatic processing of the 3D printing device in cooperation with the automatic powder cleaning mechanism, avoiding manual operation, greatly improving the production efficiency of the 3D printing device, reducing the labor cost, and improving the production safety of 3D printing. Description of the Drawings

[0015] Figure 1 It is the first three-dimensional structure diagram of the present invention;

[0016] Figure 2 It is the second three-dimensional structure diagram of the present invention;

[0017] Figure 3 It is the first three-dimensional diagram of the forming bottom plate of the present invention;

[0018] Figure 4Second three-dimensional view of the forming base plate of the present invention;

[0019] Figure 5 Three-dimensional view of the translation push plate of the present invention;

[0020] Figure 6 Three-dimensional view of the drag plate of the present invention;

[0021] Figure 7 Three-dimensional view of the drag plate of the present invention without the assembled working hook. Detailed implementation manners

[0022] Next, the technical solutions in the embodiments of the present invention will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments.

[0023] Embodiment: An automatic push plate part discharging mechanism for a 3D printing device, including a forming base plate 1, an inlet plate bearing table 2, an outlet plate bearing table 3, a moving push plate 4, a drag plate 5, a push plate driving device, a drag driving device and a control system. The inlet plate bearing table 2 and the outlet plate bearing table 3 are respectively arranged on the left and right sides of the 3D printing device 7. Inlet plate slides 8 and outlet plate slides 9 for the forming base plate 1 to slide are respectively arranged on the inlet plate bearing table 2 and the outlet plate bearing table 3. The inlet plate slide 8 and the outlet plate slide 9 can respectively be directly opposite and aligned with the forming piston 10 exposed on the 3D printing device 7. The moving push plate 4 is slidably installed on the inlet plate slide 8, and the drag plate 5 is slidably installed on the outlet plate slide 9. The push plate driving device and the drag driving device respectively drive the moving push plate 4 and the drag plate 5 to reciprocally slide along the inlet plate slide 8 and the outlet plate slide 9. The moving push plate 4 can push the forming base plate 1 on the inlet plate slide 8 to slide forward and finally reach the forming piston 10 of the 3D printing device 7. A hook-up structure is arranged on the side wall of the forming base plate 1 facing the outlet plate bearing table 3. A working hook 6 is arranged on one side of the drag plate 5 facing the 3D printing device 7. The working hook 6 can hook the hook-up structure on the forming base plate 1 and then drive the forming base plate 1 on the forming piston 10 of the 3D printing device 7 to slide away from the 3D printing device 7 along the outlet plate slide 9. The control system controls the start and stop of the push plate driving device, the drag driving device and the 3D printing device 7.

[0024] Before preparing for 3D printing, turn on the 3D printing device 7. The forming cylinder descends to be flush with the forming piston 10, thereby exposing the forming piston 10. Place a forming bottom plate 1 in the plate feeding slideway 8 of the plate feeding carrier table 2. Start the push plate driving device, and move the push plate 4 towards the 3D printing device 7, thereby pushing the forming bottom plate 1 to slide forward. Finally, push the forming bottom plate 1 into the 3D printing device 7 and onto the forming piston 10. The forming cylinder and the forming piston 10 of the 3D printing device 7 ascend to a position aligned with the bottom plate of the forming chamber. The 3D printing device 7 is turned off and 3D printing is started. After 3D printing is completed, powder cleaning is performed first under different conditions of the formed part. Generally, a powder cleaning outer shell is hermetically sleeved outside the forming cylinder of this type of 3D printing device 7. Before powder cleaning, first lower the forming cylinder to be aligned with the forming piston 10, and then a vacuum cleaner connected to the powder cleaning outer shell performs high-suction powder cleaning on the residual powder in the powder cleaning outer shell. After powder cleaning is completed, the powder cleaning outer shell is opened, so that the forming piston 10, the forming bottom plate 1 and the formed workpiece on it are exposed. Start the dragging driving device, and the dragging plate 5 moves towards the 3D printing device 7. When it moves in place, the working hook 6 on the dragging plate 5 just hooks the hooking structure on the forming bottom plate 1. Then, the dragging driving device drives the dragging plate 5 to move in the reverse direction, dragging the forming bottom plate 1 and the formed workpiece on it out of the 3D printing device 7. Finally, other handling equipment can take away and separate the forming bottom plate 1 and the formed workpiece parked on the plate discharging slideway 9 of the plate discharging carrier table 3. The above mechanism can accurately place the forming bottom plate 1 for the 3D printing device 7 automatically, and can also automatically drag out the workpiece printed by the 3D printing device 7 and the forming bottom plate 1 used to support the workpiece from the 3D printing device 7. This mechanism, combined with the automatic powder cleaning mechanism of the 3D printing device 7, can realize the full-automatic production of the 3D printing device 7, avoid manual operation, effectively improve the 3D printing production efficiency, reduce the labor cost of 3D printing, and improve the safety of 3D printing production.

[0025] The working hook 6 is articulated on the dragging plate 5 so as to be able to rotate by a set angle around a horizontal rotating shaft. The working hook 6 forms a hook body 61 and a linkage arm 62 on both sides of the rotating shaft respectively. The hook body 61 can hook the hooking structure of the forming bottom plate 1, and the weight difference between the self-weight of the hook body 61 and the weight of the linkage arm 62 causes the working hook 6 to always remain in the state of hooking the hooking structure without external force. The hooking structure on the forming bottom plate 1 includes a notch groove structure 12 provided on the side wall of the forming bottom plate 1 facing the plate-out bearing table 3 and a horizontal cross beam 13 provided in the notch groove structure 12. The hook body 61 of the working hook 6 can hook the horizontal cross beam 13 through the opening of the notch groove structure 12. When the working hook 6 slides with the dragging plate 5 towards the 3D printing device 7, the hook body 61 first contacts the horizontal cross beam 13 through an inclined surface or an arc surface, and then forces the working hook 6 to rotate to a position allowing the horizontal cross beam 13 to enter the hook body 61. A dragging hook separator 11 is also installed on the plate-out bearing table 3. When the dragging plate 5 pulls the forming bottom plate 1 and slides towards the outside of the 3D printing device 7 to a specified position, the linkage arm 62 of the working hook 6 on the dragging plate 5 reaches the working position of the dragging hook separator 11, and the dragging hook separator 11 forces the linkage arm 62 of the working hook 6 to rotate, thereby causing the hook body 61 of the working hook 6 to disengage from the hooking structure on the forming bottom plate 1.

[0026] There is a rectangular groove at the left end of the drag plate 5, and a working hook 6 is installed therein. The hook body 61 of the working hook 6 is located at the lowest position by its own weight. When the drag plate 5 moves towards the 3D printing device 7, the working hook 6 contacts the horizontal beam 13 of the notch groove structure 12 at the right end of the forming base plate 1 through an inclined surface or an arc surface. The inclined surface or the arc surface can be located on the horizontal beam 13 or the hook body 61. The inclined surface or the arc surface generates an upward component force on the hook body 61. During the contact process, as the drag plate 5 continues to move forward, the hook body 61 of the working hook 6 is lifted. Continue to move left until the hook body 61 of the working hook 6 falls by its own weight after passing over the horizontal beam 13 and hooks the horizontal beam 13. When the drag plate 5 moves right and is hooked, the working hook 6 will remain in the hooked state under the action of its own weight. The push-drag plate starts to move in the reverse direction, and the forming base plate 1 and the formed workpiece thereon are dragged by the push-drag plate away from the 3D printing device 7. After sliding to the designated position on the plate-out slideway 9, the linkage arm 62 of the working hook 6 enters the working position of the drag hook separator 11. The drag hook separator 11 causes the linkage arm 62 of the working hook 6 to rotate and then drives the hook body 61 to rotate, and the hook body 61 is separated from the horizontal beam 13 on the forming base plate 1. At this time, the drag plate 5 is separated from the forming base plate 1. As the drag plate 5 continues to move and is separated from the forming base plate 1 by a certain distance, the forming base plate 1 and the formed workpiece thereon are placed at the designated position on the plate-out slideway 9 and wait for the handling device to transport them away. The above structure can realize that the working hook 6 automatically hooks the forming base plate 1 and maintains a stable hooked state without inputting any power to the working hook 6. At the same time, after dragging the forming base plate 1 out of the 3D printing device 7, it can automatically unhook. It is beneficial to automate the picking of the 3D printing device 7, simplify the structure, and save energy. In addition, based on this structure, a structure that drives the working hook 6 to rotate through a power device such as a cylinder or a motor to achieve hooking and unhooking also belongs to the protection scope of this application. In addition to adopting the hook body 61 structure hinged on the drag plate 5, the working hook 6 can also be an elastic telescopic pin, and a pin hole can be provided on the inner side wall of the corresponding notch groove structure 12 of the hooking structure. Such is also an equivalent replacement structure that can be easily thought of by those skilled in the art according to this patent and belongs to the protection scope of this patent.

[0027] The dragging hook separator 11 is fixedly installed on the plate output bearing table 3. The dragging hook separator 11 is provided with an inclined contact surface. As the dragging plate slides, the linkage arm 62 can gradually contact the inclined contact surface on the dragging hook separator 11 and slide along the inclined contact surface. After the pushing and dragging plate moves reversely to the position where decoupling is required, the linkage arm 62 of the working hook 6 begins to contact the inclined contact surface on the dragging hook separator 11. As the dragging plate 5 continues to move reversely, the linkage arm 62 of the working hook 6 slides along the inclined contact surface on the dragging hook separator 11, thereby causing the linkage arm 62 to be pressed and flipped to decouple. This structure is simple and the decoupling action is stable. In addition, after seeing the above structure, those skilled in the art can also think of using a magnetic attraction method to attract the linkage arm 62 to make it flip according to this application, which also belongs to the protection scope of this application.

[0028] The plate input bearing table 2 is provided with a material incoming induction device for sensing whether there is a formed bottom plate 1 in the plate input slideway 8 and a push plate induction device for sensing the position of the moving push plate 4. The plate output slideway 9 is provided with a picking-up induction device for sensing whether there is a formed bottom plate 1 in the plate output slideway 9 and a pushing and dragging induction device for sensing the position of the pushing and dragging plate. The material incoming induction device, the push plate induction device, the picking-up induction device and the pushing and dragging induction device are respectively in communication with the control system to transmit induction signals. By setting each induction device, the control system can realize the intelligent control of the push plate driving device and the dragging driving device, which is beneficial to realizing the intelligent automatic plate loading and picking-up of the 3D printing device 7, and further realizing the intelligent control production of the 3D printing device 7, and avoiding misoperation.

[0029] A guiding and positioning column 14 is also fixedly installed on the side wall of the moving push plate 4 facing the 3D printing device 7. A guiding and positioning hole 15 is provided on the side wall of the formed bottom plate 1 facing the plate input bearing table 2. The guiding and positioning column 14 on the moving push plate 4 can be inserted into the guiding and positioning hole 15 on the formed bottom plate 1 to limit the sliding direction of the formed bottom plate 1. The moving push plate 4 limits the formed bottom plate 1 by inserting the guiding and positioning column 14 into the guiding and positioning hole 15 on the formed bottom plate 1. The guiding and positioning columns 14 are preferably two spaced apart. When the moving push plate 4 moves, the formed bottom plate 1 is limited in the X direction by the two guiding and positioning columns 14, and the side wall of the moving push plate 4 facing the 3D printing device 7 limits the formed bottom plate 1 in the Y direction. Thus, the positioning position accuracy of the working bottom plate in the X and Y axis directions can be accurately achieved, ensuring that the formed bottom plate 1 is accurately placed on the forming piston 10.

[0030] A push plate positioning block 16 protruding from the surface is also fixedly provided on the movable push plate 4, and a feed plate limit stop block 17 is fixedly provided on the feed plate bearing table 2. When the movable push plate 4 slides towards the 3D printing device 7 to a specified position, the push plate positioning block 16 on the movable push plate 4 stops against the surface of the feed plate limit stop block 17, thereby causing the movable push plate 4 to stop at the specified position. After the movable push plate 4 moves to the position, the push plate positioning block 16 thereon is blocked by the feed plate limit stop block 17, making it unable to continue moving towards the 3D printing device 7. Thus, the pushing-in position of the forming base plate 1 is restricted, ensuring the perfect alignment of the forming base plate 1 and the forming piston 10.

[0031] A feed plate guide groove 18 is provided on the side wall of the feed plate slideway 8, and a discharge plate guide groove 19 is provided on the side wall of the discharge plate slideway 9. A feed plate guide bar 20 that can slide is provided on the side wall of the movable push plate 4 and is inserted into the feed plate guide groove 18, and a drag guide bar (21) that can slide is provided on the side wall of the drag plate 5 and is inserted into the discharge plate guide groove 19. The above structure realizes the sliding guidance of the translation push plate and the drag plate in the feed plate slideway 8 and the discharge plate slideway 9, ensures their movement accuracy, and further ensures the automatic centering of the forming base plate 1 and the forming piston 10, which is beneficial to the accurate feeding and smooth pulling out of the forming base plate 1.

[0032] The push plate driving device includes a push motor reduction unit 22 and a push gear 23, and the drag driving device includes a drag motor reduction unit 24 and a drag gear 25. A push rack 26 is provided on the feed plate slideway 8, and a drag rack 27 is provided on the discharge plate slideway 9. The push gear 23 is in meshing transmission with the push rack 26, and the drag gear 25 is in meshing transmission with the drag rack 27. The control system controls the start, stop, forward and reverse rotation of the push motor reduction unit 22 and the drag motor reduction unit 24. The translation push plate and the drag plate are driven by the motor reduction unit and the gear-rack mechanism. Through the meshing transmission between the gear and the rack, the transmission accuracy is high, the overall strength is high, it is conducive to automatic control, and the floor area can be reduced and the volume can be reduced.

[0033] On a section of the feeding plate slideway 8 close to the 3D printing device 7, a feeding plate roller 28 capable of rotating around a horizontal rotating shaft is provided. On a section of the discharging plate slideway 9 close to the 3D printing device 7, a discharging plate roller 29 capable of rotating around a horizontal rotating shaft is provided. On the feeding plate bearing platform 2, a pushing sprocket 30 capable of rotating around a horizontal rotating shaft is installed. On the discharging plate bearing platform 3, a dragging sprocket 31 capable of rotating around a horizontal rotating shaft is installed. On each feeding plate roller 28, a pushing sprocket 30 is coaxially and fixedly installed. On the discharging plate roller 29, a dragging sprocket 31 is coaxially and fixedly installed. A pushing chain 32 is sleeved on each pushing sprocket 30 in a meshing manner. A dragging chain 33 is sleeved on each dragging sprocket 31 in a meshing manner. The moving push plate 4 is connected to the pushing chain 32 through a connecting piece 35, so that the feeding plate roller 28 rotates synchronously with the movement of the moving push plate 4. The dragging plate 5 is connected to the dragging chain 33 through a connecting piece 35, so that the discharging plate roller 29 rotates synchronously with the movement of the dragging plate 5. The forming bottom plate 1 can be placed on the feeding plate roller 28 and the discharging plate roller 29.

[0034] When the translation push plate and the dragging plate move, the feeding plate roller 28 and the discharging plate roller 29 are driven to rotate through the sprocket and chain mechanism. Furthermore, rolling friction of the forming bottom plate 1 in the feeding plate slideway 8 and the discharging plate slideway 9 is realized, the frictional force is reduced, the smooth feeding and discharging of the forming bottom plate 1 are ensured, and the energy consumption is saved.

[0035] A magnetic attracting plate is fixedly embedded on the bottom surface of the forming bottom plate 1. An electromagnet is fixedly embedded in the forming piston 10 of the 3D printing device 7. After being electrified, the electromagnet can be magnetically attracted to the magnetic attracting plate on the forming bottom plate 1. A powder scraping strip 34 is also fixedly installed at the bottom of the forming bottom plate 1 on the side facing the discharging plate bearing platform 3. The powder scraping strip 34 can scrape the residual powder on the surface of the forming piston 10 when the forming bottom plate 1 enters the 3D printing device 7. The interaction between the magnets in the forming bottom plate 1 and the forming piston 10 ensures the reliable connection between the forming bottom plate 1 and the forming piston 10. A depression is made at the bottom of the forming bottom plate 1, and a ferromagnetic steel plate such as soft electrical iron is inlaid. After connection, the control accuracy of up and down movement with the working piston can reach 0.002 mm, and the whole process of metal 3D printing is completed. In order to ensure the reliable combination of the forming bottom plate 1 and the forming piston 10 under the action of the strong magnet, a special silicone rubber strip for powder scraping is provided at the right end of the forming bottom plate 1 to ensure that there is no residual powder on the upper surface of the forming piston 10 during the movement.

Claims

1. An automatic push plate part discharging mechanism for a 3D printing device, characterized in that: It includes a forming base plate (1), a feed plate bearing platform (2), a discharge plate bearing platform (3), a moving push plate (4), a drag plate (5), a push plate driving device, a drag driving device and a control system. The feed plate bearing platform and the discharge plate bearing platform are respectively arranged on the left and right sides of the 3D printing device (7). Feed plate chutes (8) and discharge plate chutes (9) for the forming base plate to slide are respectively provided on the feed plate bearing platform and the discharge plate bearing platform. The feed plate chute and the discharge plate chute can respectively be directly aligned with the forming piston (10) exposed on the 3D printing device. The moving push plate is slidably installed on the feed plate chute, and the drag plate is slidably installed on the discharge plate chute. The push plate driving device and the drag driving device respectively drive the moving push plate and the drag plate to reciprocally slide along the feed plate chute and the discharge plate chute. The moving push plate can push the forming base plate on the feed plate chute forward and finally reach the forming piston of the 3D printing device. A hook structure is provided on the side wall of the forming base plate facing the discharge plate bearing platform. A working hook (6) is provided on one side of the drag plate facing the 3D printing device. The working hook can hook the hook structure on the forming base plate and then drive the forming base plate on the forming piston of the 3D printing device to slide away from the 3D printing device along the discharge plate chute. The control system controls the start and stop of the push plate driving device, the drag driving device and the 3D printing device to work.

2. The automatic push plate and part discharging mechanism of the 3D printing device according to claim 1, characterized in that: The working hook is hinged on the drag plate so as to be able to rotate by a set angle around a horizontal rotating shaft. The working hook forms a hook body (61) and a linkage arm (62) on both sides of the rotating shaft respectively. The hook body can hook the hook structure of the forming base plate, and the weight difference between the weight of the hook body and the weight of the linkage arm causes the working hook to always remain in the state of hooking the hook structure without external force. The hook structure on the forming base plate includes a notch groove structure (12) provided on the side wall of the forming base plate facing the discharge plate bearing platform and a horizontal cross beam (13) provided in the notch groove structure. The hook body of the working hook can hook the horizontal cross beam through the opening of the notch groove structure. When the working hook slides towards the 3D printing device along with the drag plate, the hook body first contacts the horizontal cross beam through an inclined surface or an arc surface, and then forces the working hook to rotate to a position allowing the horizontal cross beam to enter the hook body. A drag hook separator (11) is also installed on the discharge plate bearing platform. When the drag plate pulls the forming base plate to slide towards the outside of the 3D printing device to a specified position, the linkage arm of the working hook on the drag plate reaches the working position of the drag hook separator, and the drag hook separator forces the linkage arm of the working hook to rotate, thereby causing the hook body of the working hook to disengage from the hook structure on the forming base plate.

3. The automatic push plate part discharging mechanism of the 3D printing device according to claim 2, characterized in that: The drag hook separator is fixedly installed on the discharge plate bearing platform. The drag hook separator is provided with an inclined contact surface. The linkage arm can gradually contact the inclined contact surface on the drag hook separator as the drag plate slides and slide along the inclined contact surface.

4. The automatic push plate part discharging mechanism of the 3D printing device according to claim 1, characterized in that: An incoming material sensing device for sensing whether there is a formed bottom plate in the incoming plate chute and a push plate sensing device for sensing the position of the moving push plate are provided on the incoming plate bearing table. A picking sensing device for sensing whether there is a formed bottom plate in the outgoing plate chute and a pulling and dragging sensing device for sensing the position of the pulling and dragging plate are provided on the outgoing plate chute. The incoming material sensing device, the push plate sensing device, the picking sensing device, and the pulling and dragging sensing device respectively communicate with the control system to transmit sensing signals.

5. The automatic push plate and part discharging mechanism of the 3D printing device according to claim 1, characterized in that: A guiding and positioning post (14) is further fixedly installed on one side wall of the moving push plate facing the 3D printing device. A guiding and positioning hole (15) is provided on one side wall of the formed bottom plate facing the incoming plate bearing table. The guiding and positioning post on the moving push plate can be inserted into the guiding and positioning hole on the formed bottom plate to limit the sliding direction of the formed bottom plate.

6. The automatic push plate and part discharging mechanism of the 3D printing device according to claim 1 or 5, characterized in that: A push plate positioning block (16) protruding from its surface is further fixedly provided on the moving push plate. An incoming plate limiting stop block (17) is fixedly provided on the incoming plate bearing table. When the moving push plate slides towards the 3D printing device to a specified position, the push plate positioning block on the moving push plate stops against the surface of the incoming plate limiting stop block, thereby making the moving push plate stop at the specified position.

7. The automatic push plate part discharging mechanism of the 3D printing device according to claim 1, characterized in that: An incoming plate guiding groove (18) is provided on the side wall of the incoming plate chute, and an outgoing plate guiding groove (19) is provided on the side wall of the outgoing plate chute. An incoming plate guiding strip (20) that can slide and is inserted into the incoming plate guiding groove is provided on the side wall of the moving push plate, and a dragging guiding strip (21) that can slide and is inserted into the outgoing plate guiding groove is provided on the side wall of the dragging plate.

8. The automatic push plate part discharging mechanism of the 3D printing device according to claim 1, characterized in that: The push plate driving device includes a pushing motor reduction unit (22) and a pushing gear (23), and the dragging driving device includes a dragging motor reduction unit (24) and a dragging gear (25). A pushing rack (26) is provided on the incoming plate chute, and a dragging rack (27) is provided on the outgoing plate chute. The pushing gear meshes with the pushing rack for transmission, and the dragging gear meshes with the dragging rack for transmission. The control system controls the start, stop, forward and reverse rotation of the pushing motor reduction unit and the dragging motor reduction unit.

9. The automatic push plate part discharging mechanism of the 3D printing device according to claim 1, characterized in that: An incoming plate roller (28) that can rotate around a horizontal rotating shaft is provided on a section of the incoming plate chute close to the 3D printing device, and an outgoing plate roller (29) that can rotate around a horizontal rotating shaft is provided on a section of the outgoing plate chute close to the 3D printing device. A pushing sprocket (30) that can rotate around a horizontal rotating shaft is installed on the incoming plate bearing table, and a dragging sprocket (31) that can rotate around a horizontal rotating shaft is installed on the outgoing plate bearing table. A pushing sprocket is coaxially and fixedly installed on each incoming plate roller, and a dragging sprocket is coaxially and fixedly installed on each outgoing plate roller. A pushing chain (32) is meshed and sleeved on each pushing sprocket, and a dragging chain (33) is meshed and sleeved on each dragging sprocket. The moving push plate is connected to the pushing chain through a connecting member (35) so that the incoming plate roller rotates synchronously with the movement of the moving push plate. The dragging plate is connected to the dragging chain through a connecting member so that the outgoing plate roller rotates synchronously with the movement of the dragging plate. The formed bottom plate can be placed on the incoming plate roller and the outgoing plate roller.

10. The automatic push plate and part discharging mechanism of the 3D printing device according to claim 1, characterized in that: A magnetic suction plate is fixedly embedded on the bottom surface of the forming bottom plate. An electromagnet is fixedly embedded in the forming piston of the 3D printing device. After the electromagnet is powered on, it can be magnetically attracted to the magnetic suction plate on the forming bottom plate. A powder scraping strip (34) is also fixedly installed at the bottom of the forming bottom plate on the side facing the plate output and bearing table. The powder scraping strip can scrape off the residual powder on the surface of the forming piston when the forming bottom plate enters the 3D printing device.

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