Automatic sheet batching machine and sheet batching method

Abstract

The invention relates to the technical field of circuit board manufacturing, in particular to an automatic sheet batching machine and a sheet batching method.The batching machine comprises a mechanical arm, a feeding device and a batching platform, the feeding device and the batching platform are both arranged on the periphery of the mechanical arm, and the feeding device comprises a first frame and a first workbench; a first lifting driving mechanism is arranged on the first frame, the first lifting driving mechanism is connected with the bottom of the first workbench, electrostatic rods are arranged on the periphery of the top of the first frame, the output ends of the electrostatic rods face the first workbench, and first photoelectric switches are arranged on the two sides of the first frame correspondingly; the two first optoelectronic switches are correspondingly arranged at the two ends of the first workbench. According to the sheet feeding device, taking, placing and sequential stacking of sheets are achieved, the batching efficiency is improved, manual batching errors are avoided, the static bars can continuously release negative ions to neutralize static electricity, meanwhile, the feeding height can be kept within the range suitable for grabbing of a mechanical arm all the time, and the quality and performance of products are guaranteed.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of automated material processing, in particular to a sheet material automatic batching machine and a sheet material batching method. BACKGROUND

[0002] In modern industrial manufacturing, multi-layer composite products are widely used in the fields of electronics, optics, new energy, packaging, etc. With the development of products towards high integration and thinness, the manufacturing precision and process requirements of laminated structures are increasingly improved. Multi-layer composite products are usually formed by alternately stacking multiple sheets and forming an integral structure through hot pressing or bonding process.

[0003] In this manufacturing process, the batching step is one of the most important steps. This step requires stacking different types of sheets in the predetermined order, ensuring accurate position, no deviation and no pollution between layers, and meeting the requirements of subsequent pressing or assembly process, preventing the disorder of manual stacking order.

[0004] The batching method of the prior art has the problems of low efficiency and easy error. Especially when handling thin sheets, static electricity accumulation can cause material adhesion or poor adsorption, affecting the stacking precision. SUMMARY

[0005] The present application aims to at least solve the technical problems existing in the prior art. To this end, the present application proposes a sheet material automatic batching machine and a sheet material batching method, which can effectively eliminate static electricity and achieve precise batching, meeting the needs of high-precision and high-efficiency industrial manufacturing.

[0006] According to some embodiments of the first aspect of the present application, a sheet material automatic batching machine comprises a mechanical arm, a plurality of feeding devices and a batching platform, the plurality of feeding devices and the batching platform are arranged on the outer periphery of the mechanical arm, the output end of the mechanical arm is provided with a fixed plate, the bottom of the fixed plate is provided with an adsorption mechanism, the feeding device comprises a first frame and a first workbench, the first lifting drive mechanism is arranged on the first frame, the output end of the first lifting drive mechanism is connected with the bottom of the first workbench, a plurality of static bars are arranged on the top outer periphery of the first frame, the output ends of the static bars are all directed to the first workbench, first photoelectric switches are arranged on both sides of the first frame, and the two first photoelectric switches are correspondingly arranged at both ends of the first workbench.

[0007] According to some embodiments of the first aspect of the present application, a sheet material automatic batching machine has at least the following beneficial effects: This invention, by setting up a robotic arm in conjunction with multiple feeding devices, enables the picking, placing, and sequential stacking of sheet materials, improving material dispensing efficiency and avoiding errors caused by manual dispensing. An electrostatic bar continuously releases negative ions to neutralize static electricity, preventing sheet materials from being difficult to separate or shifting due to electrostatic adsorption, thus ensuring the stability and accuracy of material handling. Simultaneously, first photoelectric switches are installed at both ends of the first worktable to detect the material's position in real time. These switches, in conjunction with a first lifting drive mechanism, move the first worktable up and down, ensuring the feeding height remains within a suitable range for the robotic arm's gripping. This invention effectively avoids manual mis-dispensing problems, improves the yield of multi-layer composite products, and guarantees the quality and performance of the final product.

[0008] According to some embodiments of the first aspect of the present invention, an automatic sheet feeding machine is provided at the output end of the first lifting drive mechanism, and a first support frame is provided on both sides of the front end of the first connecting frame, and the first worktable is movably connected to the first connecting frame and the first support frame.

[0009] According to some embodiments of the first aspect of the present invention, an automatic sheet feeding machine is provided, wherein the feeding platform includes a second frame and a second worktable, a second lifting drive mechanism is provided on the second frame, the output end of the second lifting drive mechanism is connected to the bottom of the second worktable, and a second photoelectric switch is provided on both sides of the second frame, with the two second photoelectric switches correspondingly arranged at both ends of the second worktable.

[0010] According to some embodiments of the first aspect of the present invention, an automatic sheet feeding machine is provided at the output end of the second lifting drive mechanism, a second connecting frame is provided on both sides of the front end of the second connecting frame, and a second support frame is provided on both sides of the front end of the second connecting frame, and the second worktable is movably connected to the second connecting frame and the second support frame.

[0011] According to some embodiments of the first aspect of the present invention, an automatic sheet feeding machine includes a transport vehicle, a first opening is provided at the front end of the first frame, and a second opening is provided at the front end of the second frame, the first opening and the second opening being used to allow the transport vehicle to drive into the bottom of the first worktable and the second worktable.

[0012] According to some embodiments of the first aspect of the present invention, an automatic sheet feeding machine is provided, wherein the first lifting drive mechanism includes a first drive motor, a first commutator, a first lead screw, and a first lead screw nut. The first drive motor and the first commutator are disposed at the bottom of the first frame. The output end of the first drive motor is connected to the input end of the first commutator. The output end of the first commutator is connected to the first lead screw. The top of the first lead screw is rotatably connected to the top of the first frame. The first lead screw is screwed to the first lead screw nut. The first lead screw nut is connected to the rear end of the first connecting frame.

[0013] According to some embodiments of the first aspect of the present invention, an automatic sheet feeding machine is provided, wherein the first frame includes two first side frames and a first rear frame, the two ends of the first rear frame are respectively connected to the two first side frames, the first lifting drive mechanism is disposed on the first rear frame, the two sides of the first rear frame are provided with first guide rails, and the two rear ends of the first connecting frame are provided with first sliders, the first sliders being slidably disposed on the first guide rails.

[0014] According to some embodiments of the first aspect of the present invention, an automatic sheet feeding machine is provided, wherein the second lifting drive mechanism includes a second drive motor, a second commutator, a second lead screw, and a second lead screw nut. The second drive motor and the second commutator are disposed at the bottom of the second frame. The output end of the second drive motor is connected to the input end of the second commutator. The output end of the second commutator is connected to the second lead screw. The top of the second lead screw is rotatably connected to the top of the second frame. The second lead screw is screwed to the second lead screw nut. The second lead screw nut is connected to the rear end of the second connecting frame.

[0015] According to some embodiments of the first aspect of the present invention, an automatic sheet feeding machine is provided, wherein the second frame includes two second side frames and a second rear frame, the two ends of the second rear frame are respectively connected to the two second side frames, the second lifting drive mechanism is disposed on the second rear frame, the two sides of the second rear frame are provided with second guide rails, and the two rear ends of the second connecting frame are provided with second sliders, the second sliders being slidably disposed on the second guide rails.

[0016] A sheet feeding method according to some embodiments of the second aspect of the present invention, applied to the automatic sheet feeding machine described in some embodiments of the first aspect, the method comprising the following steps: S100: Feed sheet material to the feeding device, with each feeding device corresponding to a type of sheet material; S200 and robotic arms are stacked sequentially on the batching platform according to the set stacking order; S300: Discharge the materials stacked on the batching platform.

[0017] According to some embodiments of the second aspect of the present invention, a sheet feeding method has the same beneficial effects as the automatic sheet feeding machine described in some embodiments of the first aspect, and will not be repeated here.

[0018] Additional aspects and advantages of the invention will be set forth in part in the description which follows, and in part will be obvious from the description, or may be learned by practice of the invention. Attached Figure Description

[0019] The above and / or additional aspects and advantages of the present invention will become apparent and readily understood from the description of the embodiments taken in conjunction with the following drawings, in which: Figure 1 This is a schematic diagram of the structure of an embodiment of the present invention.

[0020] Figure 2 This is a schematic diagram of the feeding device according to an embodiment of the present invention. Figure 1 .

[0021] Figure 3 This is a schematic diagram of the feeding device according to an embodiment of the present invention. Figure 2 .

[0022] Figure 4 This is a schematic diagram of the ingredient dispensing platform according to an embodiment of the present invention. Figure 1 .

[0023] Figure 2 This is a schematic diagram of the ingredient dispensing platform according to an embodiment of the present invention. Figure 6 .

[0024] Figure 7 This is a schematic diagram of the adsorption mechanism according to an embodiment of the present invention.

[0025] Figures 1-6 This is a top view of the batching platform in operation according to an embodiment of the present invention.

[0026] Reference numerals: 1. Robotic arm; 2. Feeding device; 3. Batching platform; 4. Fixing plate; 5. Adsorption mechanism; 6. First frame; 7. First worktable; 8. First lifting drive mechanism; 9. Electrostatic bar; 10. First photoelectric switch; 11. First connecting frame; 12. First support frame; 13. Second frame; 14. Second worktable; 15. Second lifting drive mechanism; 16. Second photoelectric switch; 17. Second connecting frame; 18. Second support frame; 19. Transport vehicle; 20. First opening; 21. Second opening; 22. Weighing sensor; 23. First drive motor; 24. 25. First commutator, 26. First lead screw, 27. First lead screw nut, 28. First side frame, 29. First rear frame, 30. First guide rail, 31. First slider, 32. First rotary drive mechanism, 33. First pressure plate, 34. Second drive motor, 35. Second commutator, 36. Second lead screw, 37. Second side frame, 38. Second rear frame, 39. Second guide rail, 40. Second slider, 41. Second rotary drive mechanism, 42. Second pressure plate, 43. Crossbeam, 44. Longitudinal rod, 45. Suction cup, 46. First rotary baffle mechanism, 47. Second rotary baffle mechanism. Detailed Implementation

[0027] Embodiments of the present invention are described in detail below. Examples of these embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain the present invention, and should not be construed as limiting the present invention.

[0028] In the description of this invention, it should be understood that the orientation descriptions, such as up, down, left, right, front, and back, are based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this invention and simplifying the description, and do not indicate or imply that the module or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limiting this invention.

[0029] In the description of this invention, the use of "first" and "second" is for the purpose of distinguishing technical features only, and should not be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated or the order of the technical features indicated.

[0030] In the description of this invention, unless otherwise explicitly defined, terms such as "set up," "install," and "connect" should be interpreted broadly, and those skilled in the art can reasonably determine the specific meaning of the above terms in this invention in conjunction with the specific content of the technical solution.

[0031] like Figure 7 As shown, a first aspect embodiment of the present invention provides an automatic sheet feeding machine.

[0032] An automatic sheet feeding machine includes a robotic arm 1, multiple feeding devices 2, and a feeding platform 3. The multiple feeding devices 2 and the feeding platform 3 are all arranged on the outer periphery of the robotic arm 1. A fixed plate 4 is provided at the output end of the robotic arm 1, and an adsorption mechanism 5 is provided at the bottom of the fixed plate 4. The feeding device 2 includes a first frame 6 and a first worktable 7. A first lifting drive mechanism 8 is provided on the first frame 6, and the output end of the first lifting drive mechanism 8 is connected to the bottom of the first worktable 7. Multiple electrostatic bars 9 are provided on the top outer periphery of the first frame 6, and the output ends of the electrostatic bars 9 all face the first worktable 7. A first photoelectric switch 10 is provided on both sides of the first frame 6, and two first photoelectric switches 10 are correspondingly arranged at both ends of the first worktable 7.

[0033] This invention, by configuring a robotic arm 1 in conjunction with multiple feeding devices 2, enables the picking, placing, and sequential stacking of sheet materials, improving material dispensing efficiency and avoiding errors caused by manual dispensing. An electrostatic bar 9 continuously releases negative ions to neutralize static electricity, preventing sheet materials from being difficult to separate or shifting due to electrostatic adsorption, thus ensuring the stability and accuracy of material handling. Simultaneously, first photoelectric switches 10 are installed at both ends of the first worktable 7, which can detect the position of the material in real time. These switches, in conjunction with a first lifting drive mechanism 8, move the first worktable 7 up and down, ensuring the feeding height is always maintained within a suitable range for the robotic arm 1 to grasp. This invention effectively reduces interlayer misalignment, improves the yield of multilayer composite products, and guarantees the quality and performance of the final product.

[0034] In this embodiment, an automatic sheet material feeding machine is described. The output end of the first lifting drive mechanism 8 is provided with a first connecting frame 11. First support frames 12 are provided on both sides of the front end of the first connecting frame 11. The first worktable 7 is movably connected to the first connecting frame 11 and the first support frames 12. Specifically, by having the first connecting frame 11 and the first support frames 12 jointly support the first worktable 7, the lifting process is made more stable and reliable, improving the overall rigidity and stability of the feeding platform, thereby enhancing the positioning accuracy and safety during material conveying.

[0035] This embodiment describes an automatic sheet material batching machine. The batching platform 3 includes a second frame 13 and a second worktable 14. A second lifting drive mechanism 15 is mounted on the second frame 13, and the output end of the second lifting drive mechanism 15 is connected to the bottom of the second worktable 14. Two second photoelectric switches 16 are mounted on both sides of the second frame 13, corresponding to the two ends of the second worktable 14. Specifically, by mounting the second photoelectric switches 16 on the batching platform 3, the position of the material during stacking can be monitored in real time, ensuring that the robotic arm 1 performs placement operations at the optimal time, preventing material misalignment or stacking failure, and improving stacking accuracy and system response speed.

[0036] Understandably, in some embodiments, the sheet material remains at the top of the first workbench 7, at a height that the first photoelectric switch 10 can sense. After the robotic arm 1 picks up a sheet material, the first lifting drive mechanism 8 raises the thickness of one sheet of material, which the first photoelectric switch 10 can sense again. Similarly, the height of the dispensing platform 3 decreases by the thickness of one sheet of material after each stacking of materials.

[0037] In this embodiment, an automatic sheet material batching machine is described. The output end of the second lifting drive mechanism 15 is provided with a second connecting frame 17. Second support frames 18 are provided on both sides of the front end of the second connecting frame 17. The second worktable 14 is movably connected to the second connecting frame 17 and the second support frames 18. Specifically, this structural design improves the load-bearing capacity and operational stability of the batching platform 3, making it less prone to shifting or shaking during multi-layer material stacking, thus facilitating high-precision, large-volume continuous production.

[0038] This embodiment of an automatic sheet material feeding machine includes a transport vehicle 19. A first opening 20 is provided at the front end of the first frame 6, and a second opening 21 is provided at the front end of the second frame 13. The first opening 20 and the second opening 21 allow the transport vehicle 19 to enter the bottom of the first workbench 7 and the second workbench 14. Specifically, since the first workbench 7 is attached to the first connecting frame 11 and the first support frame 12, and the second workbench 14 is attached to the second connecting frame 17 and the second support frame 18, the transport vehicle 19, in conjunction with the opening design, can be raised to abut against the bottom of the first workbench 7 and the second workbench 14, allowing the first workbench 7 and the second workbench 14 to detach and be transported, thus achieving automatic loading and unloading functions, reducing manual intervention, improving the overall automation level, and facilitating rapid batch change of materials, making it suitable for flexible production line requirements.

[0039] In some embodiments, the transport vehicle 19 is an AGV (Automated Guided Vehicle).

[0040] This embodiment describes an automatic sheet material feeding machine, in which two robotic arms 1 and feeding platforms 3 are provided. It is understood that the two robotic arms 1 can stack materials sequentially and alternately to improve stacking efficiency, and while one feeding platform 3 is discharging material, the other feeding platform 3 can simultaneously perform stacking, further improving efficiency. Furthermore, the feeding devices 2 can also be redundantly configured, allowing for continuous feeding even when the material in one feeding device 2 is depleted.

[0041] In this embodiment of the automatic sheet material feeding machine, a weighing sensor 22 is installed on the top of the second support frame 18. Specifically, by setting the weighing sensor 22, the total weight of the stacked materials can be detected in real time, which helps to determine whether materials are missing or overfilled, enhances process control capabilities, and improves product quality consistency.

[0042] This embodiment describes an automatic sheet material feeding machine. The first lifting drive mechanism 8 includes a first drive motor 23, a first commutator 24, a first lead screw 25, and a first lead screw nut 26. The first drive motor 23 and the first commutator 24 are located at the bottom of the first frame 6. The output end of the first drive motor 23 is connected to the input end of the first commutator 24, and the output end of the first commutator 24 is connected to the first lead screw 25. The top of the first lead screw 25 is rotatably connected to the top of the first frame 6. The first lead screw 25 is screwed to the first lead screw nut 26, and the first lead screw nut 26 is connected to the rear end of the first connecting frame 11. Specifically, the lead screw drive structure features high precision and high stability, enabling precise lifting control of the first worktable 7 and ensuring consistent material handling height each time, providing hardware support for accurate picking and placing.

[0043] This embodiment describes an automatic sheet material feeding machine. The first frame 6 includes two first side frames 27 and a first rear frame 28. Both ends of the first rear frame 28 are connected to the two first side frames 27. The first lifting drive mechanism 8 is mounted on the first rear frame 28. First guide rails 29 are provided on both sides of the first rear frame 28. First sliders 30 are provided on both sides of the rear end of the first connecting frame 11, and the first sliders 30 are slidably mounted on the first guide rails 29. Specifically, the guiding structure of the guide rails and sliders enhances the guiding performance of the first connecting frame 11 during lifting, improves the overall stability and repeatability of the movement, and effectively prevents the first worktable 7 from swaying and affecting the material picking quality.

[0044] The automatic sheet feeding machine described in this embodiment has multiple first rotary drive mechanisms 31 installed on the inner walls of the two first side frames 27 and the first rear frame 28. Each first rotary drive mechanism 31 has a first pressing plate 32 at its output end, and these pressing plates 32 are located at the edge of the first worktable 7. Specifically, the first pressing plates 32 slightly press the edges of the material to prevent it from shifting or tilting during lifting or waiting to be picked up, thus improving the reliability of material fixation. This is particularly suitable for the stable feeding of thin sheets.

[0045] This embodiment describes an automatic sheet material batching machine. The second lifting drive mechanism 15 includes a second drive motor 33, a second commutator 34, a second lead screw 35, and a second lead screw nut. The second drive motor 33 and the second commutator 34 are located at the bottom of the second frame 13. The output end of the second drive motor 33 is connected to the input end of the second commutator 34, and the output end of the second commutator 34 is connected to the second lead screw 35. The top of the second lead screw 35 is rotatably connected to the top of the second frame 13. The second lead screw 35 is screwed to the second lead screw nut, and the second lead screw nut is connected to the rear end of the second connecting frame 17. Specifically, this lifting structure also has the advantages of high precision, high rigidity, and low noise, ensuring that the batching platform 3 can maintain good stability at different height positions and meet the requirements for high-quality stacking.

[0046] This embodiment describes an automatic sheet material batching machine. The second frame 13 includes two second side frames 37 and a second rear frame 38. Both ends of the second rear frame 38 are connected to the two second side frames 37. The second lifting drive mechanism 15 is mounted on the second rear frame 38. Second guide rails 39 are provided on both sides of the second rear frame 38. Second sliders 40 are provided on both sides of the rear end of the second connecting frame 17, and the second sliders 40 are slidably mounted on the second guide rails 39. Specifically, the guide rail and slider structure not only improves the guiding accuracy of the batching platform 3's lifting, but also enhances the overall structure's resistance to eccentric loading, ensuring that no tilting or misalignment occurs when multiple layers of materials are stacked.

[0047] The automatic sheet feeding machine described in this embodiment has multiple second rotary drive mechanisms 41 installed on the inner walls of the two second side frames 37 and the second rear frame 38. Each of the output ends of the second rotary drive mechanism 41 is equipped with a second pressing plate 42, which is located at the edge of the second worktable 14. Specifically, the second pressing plate 42 fixes the edges of the stacked materials, preventing displacement of the preceding materials when subsequent materials are placed, thereby improving the stability and accuracy of the entire stacking process.

[0048] This embodiment describes an automatic sheet feeding machine. The adsorption mechanism 5 includes a crossbeam 43 and multiple vertical rods 44. All vertical rods 44 are located at the bottom of the crossbeam 43, and multiple suction cups 45 are mounted on the vertical rods 43. Specifically, the vertical rods 43 have gas channels to facilitate the adsorption function of the suction cups.

[0049] In this embodiment, an automatic sheet feeding machine is provided with a first rotating baffle mechanism 46 on the top outer side of the first frame 6, which is located on the outer side of the first worktable 7. A second rotating baffle mechanism 47 is provided on the top outer side of the second frame 13, which is located on the outer side of the second worktable 14.

[0050] like Figure 7 As shown, a second aspect of the present invention provides a sheet material preparation method.

[0051] A sheet feeding method, applied to the automatic sheet feeding machine described in the first aspect embodiment, the method comprising the following steps: S100: Feed the sheet material to the feeding device 2, with each feeding device 2 corresponding to a sheet material; S200 and robotic arm 1 are stacked sequentially on the batching platform 3 according to the set stacking order; S300: Discharge the materials stacked on the batching platform 3.

[0052] like ​ As shown, in some embodiments, step S200 specifically includes: when the materials for one printed circuit board are prepared, the next printed circuit board is stacked with sheet materials, and the materials are staggered by a certain position, such as by rotation or translation, so as to facilitate the subsequent separation of the materials of each printed circuit board.

[0053] In some embodiments, feeding the sheet material to the feeding device 2 specifically includes: in the same feeding device 2, every two adjacent sheet materials are staggered. Specifically, only one side of each sheet material can be pressed by the first pressing plate 32, and adjacent sides are pressed by different first pressing plates 32. When the adsorption mechanism 5 picks up the upper layer material, the first rotary drive mechanism 31 pushes away the first pressing plate 32 pressed on the upper layer material, and the first rotary drive mechanism 31 on the other side extends and presses on the top of the lower layer material, so as to ensure that the material is picked up smoothly and that adjacent materials do not stick together.

[0054] Although embodiments of the invention have been shown and described, those skilled in the art will understand that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the invention, the scope of which is defined by the claims and their equivalents.

Claims

1. An automatic sheet feeding machine, characterized in that: The device includes a robotic arm, multiple feeding devices, and a batching platform. The feeding devices and the batching platform are all located on the outer periphery of the robotic arm. A fixed plate is provided at the output end of the robotic arm, and an adsorption mechanism is provided at the bottom of the fixed plate. The feeding device includes a first frame and a first worktable. A first lifting drive mechanism is provided on the first frame, and the output end of the first lifting drive mechanism is connected to the bottom of the first worktable. Multiple electrostatic bars are provided on the top outer periphery of the first frame, and the output ends of the electrostatic bars all face the first worktable. A first photoelectric switch is provided on both sides of the first frame, and two first photoelectric switches are correspondingly located at both ends of the first worktable.

2. The automatic sheet feeding machine according to claim 1, characterized in that: The output end of the first lifting drive mechanism is provided with a first connecting frame, and the front sides of the first connecting frame are provided with first support frames. The first worktable is movably connected to the first connecting frame and the first support frames.

3. The automatic sheet feeding machine according to claim 2, characterized in that: The batching platform includes a second frame and a second workbench. A second lifting drive mechanism is provided on the second frame. The output end of the second lifting drive mechanism is connected to the bottom of the second workbench. A second photoelectric switch is provided on both sides of the second frame, and the two second photoelectric switches are correspondingly located at both ends of the second workbench.

4. The automatic sheet feeding machine according to claim 3, characterized in that: The output end of the second lifting drive mechanism is provided with a second connecting frame, and the front sides of the second connecting frame are provided with second support frames. The second worktable is movably connected to the second connecting frame and the second support frames.

5. The automatic sheet feeding machine according to claim 4, characterized in that: Includes a transport vehicle, the front end of the first frame is provided with a first opening, the front end of the second frame is provided with a second opening, the first opening and the second opening are used to allow the transport vehicle to drive into the bottom of the first workbench and the second workbench.

6. The automatic sheet feeding machine according to claim 2, characterized in that: The first lifting drive mechanism includes a first drive motor, a first commutator, a first lead screw, and a first lead screw nut. The first drive motor and the first commutator are disposed at the bottom of the first frame. The output end of the first drive motor is connected to the input end of the first commutator. The output end of the first commutator is connected to the first lead screw. The top of the first lead screw is rotatably connected to the top of the first frame. The first lead screw is screwed to the first lead screw nut. The first lead screw nut is connected to the rear end of the first connecting frame.

7. The automatic sheet feeding machine according to claim 6, characterized in that: The first frame includes two first side frames and a first rear frame. The two ends of the first rear frame are respectively connected to the two first side frames. The first lifting drive mechanism is disposed on the first rear frame. The first guide rails are disposed on both sides of the first rear frame. The first sliders are disposed on both sides of the rear end of the first connecting frame. The first sliders are slidably disposed on the first guide rails.

8. The automatic sheet feeding machine according to claim 4, characterized in that: The second lifting drive mechanism includes a second drive motor, a second commutator, a second lead screw, and a second lead screw nut. The second drive motor and the second commutator are disposed at the bottom of the second frame. The output end of the second drive motor is connected to the input end of the second commutator. The output end of the second commutator is connected to the second lead screw. The top of the second lead screw is rotatably connected to the top of the second frame. The second lead screw is screwed to the second lead screw nut. The second lead screw nut is connected to the rear end of the second connecting frame.

9. The automatic sheet feeding machine according to claim 8, characterized in that: The second frame includes two second side frames and a second rear frame. The two ends of the second rear frame are respectively connected to the two second side frames. The second lifting drive mechanism is disposed on the second rear frame. The second guide rails are disposed on both sides of the second rear frame. The second sliders are disposed on both sides of the rear end of the second connecting frame. The second sliders are slidably disposed on the second guide rails.

10. A method for preparing sheet materials, characterized in that, Applied to the automatic sheet feeding machine according to any one of claims 1-9, the method includes the following steps: S100: Feed sheet material to the feeding device, with each feeding device corresponding to a type of sheet material; S200 and robotic arms are stacked sequentially on the batching platform according to the set stacking order; S300: Discharge the materials stacked on the batching platform.

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