Automatic dismounting method and device for substrate of additive manufacturing equipment

Abstract

The invention relates to an automatic dismounting method for a substrate of additive manufacturing equipment, belongs to the technical field of additive manufacturing, and is used for solving one of the problems that in the prior art, the substrate dismounting convenience is poor, the substrate is not easy to dismount due to deformation, and time and labor are wasted during dismounting due to non-uniform stress of screws. The method comprises the following steps that firstly, after printing is completed, a piston assembly drives a forming base plate to ascend to the upper end of a cylinder body; and secondly, the automatic screw screwing system dismantles the screws on the base plate. According to the invention, the disassembly and assembly convenience of the existing substrate can be improved, the additive manufacturing efficiency is improved, and the additive manufacturing is not influenced by automatic disassembly of equipment.

Description

An automatic disassembly method and apparatus for substrate of additive manufacturing equipment Technical Field

[0001] This invention relates to the field of automatic substrate removal technology, and in particular to an automatic substrate removal method and apparatus for additive manufacturing equipment. Background Technology

[0002] Laser selective melting (LSM) is a key technology in additive manufacturing. Its core principle involves focusing a high-energy-density laser beam to selectively scan and sinter a pre-spread layer of metal powder, repeating this process to achieve layer-by-layer deposition of three-dimensional metal parts. Compared to traditional casting, forging, and machining techniques, this technology offers significant advantages: firstly, it overcomes the limitations of traditional manufacturing processes, enabling the integrated manufacturing of arbitrarily complex structural components; secondly, the formed products exhibit fine grain structures and excellent overall mechanical properties. Based on these advantages, this technology provides a novel approach to lightweight aircraft structures, topology optimization design, and manufacturing, and has become an important development direction for advanced manufacturing in the aerospace field, with increasingly broad application prospects in high-end equipment manufacturing.

[0003] However, existing laser selective melting forming technology faces many problems that urgently need to be solved when adapting to the forming needs of large products: as the size of the forming substrate increases, the difficulty of disassembling and assembling the substrate after printing increases significantly, which is not conducive to manual operation; the method of fastening the substrate and piston with screws to ensure printing accuracy can achieve precise reciprocating motion of the substrate to ensure the levelness of the reference surface and the uniformity of the powder layer thickness, but it also results in the substrate being in a completely constrained state; in addition, the uncertainty of laser scanning path planning can easily cause uneven heating of the substrate in the early stage of printing, resulting in local thermal stress. The stress accumulated during the printing process cannot be released in time, which leads to plastic strain. The warping deformation of the substrate will also generate large tensile stress on the surrounding fastening screws, ultimately resulting in a large torque required to unscrew the screws when disassembling the substrate. Manual operation is time-consuming and laborious. Moreover, the aforementioned problems such as substrate deformation and inconvenient disassembly and assembly can also indirectly affect the dimensional accuracy of the printed products and reduce the product qualification rate.

[0004] Therefore, how to achieve automatic disassembly of substrates in additive manufacturing equipment is a technical problem that urgently needs to be solved by those skilled in the art. Summary of the Invention

[0005] Based on the above analysis, the present invention aims to provide an automatic disassembly method for substrates in additive manufacturing equipment, which solves one of the problems in the prior art: poor ease of substrate disassembly and assembly, difficulty in removing deformed substrates, and time-consuming and laborious removal due to uneven screw force.

[0006] This invention provides an automatic disassembly method for substrates in additive manufacturing equipment, comprising the following steps:

[0007] Step 1: After printing is completed, the piston assembly drives the forming substrate to rise to the top of the cylinder.

[0008] Step 2: The automatic screw-screw system removes the screws from the substrate.

[0009] Furthermore, between step one and step two, there is also a step of adjusting the position of the automatic screw-in system.

[0010] Furthermore, in step two, the specific steps are as follows: the lifting slide moves the nail gun mechanism down, causing the bolt to contact the screw head.

[0011] Furthermore, step two also includes starting the screw-tightening motor, which drives the bolt to rotate and loosen the screw.

[0012] Furthermore, step two also includes pausing the operation of the nail-tightening motor. When the torque drops to a set threshold, the nail-tightening motor stops, the lifting slide rises, and the stable nail-removing assembly completes the nail removal.

[0013] Furthermore, it also includes step three, in which the walking system drives the automatic screwing system to move on the guide rail.

[0014] Furthermore, it also includes step four: when the monitoring module detects the screw to be removed, the monitoring module sends a signal to the control system, and the control system controls the walking system to stop walking.

[0015] Furthermore, prior to step one, the automatic screwing system is in a non-working position.

[0016] Furthermore, it also includes step six, whereby the automatic screw-screw system moves to the non-working position after all the screws on the substrate have been removed.

[0017] In another aspect, the present invention provides an automatic substrate removal device for additive manufacturing equipment, which removes screws from the substrate using the above-described method.

[0018] Compared with the prior art, the present invention can achieve at least one of the following beneficial effects:

[0019] (1) The additive manufacturing equipment substrate automatic disassembly method of the present invention uses a piston assembly to drive the formed substrate to the upper end of the cylinder, so that the substrate is in a reasonable position for easy disassembly and the difficulty of manual operation is reduced; at the same time, the automatic screwing system replaces the manual removal of screws, which directly solves the problem of large torque and laborious operation when manually removing screws of large substrates, significantly improves the substrate disassembly efficiency, reduces the labor intensity of manual labor, and meets the disassembly requirements of large substrates.

[0020] (2) The automatic disassembly method for substrate of additive manufacturing equipment described in this invention adds an automatic screw-in system position adjustment step between substrate lifting and screw removal, which can accurately align the screws on the substrate, effectively solving the problems of screw-in failure, screw damage or substrate scratches caused by position deviation, ensuring smooth disassembly process, and indirectly avoiding the hidden danger of further affecting the accuracy of substrate and printed products due to disassembly operation errors.

[0021] (3) The automatic disassembly method for substrate of additive manufacturing equipment described in this invention places the automatic screwing system in a non-working position before printing, which can effectively avoid interference with core printing operations such as laser scanning and powder spreading, solve the problem of interference between equipment components affecting printing accuracy, ensure the stability of the printing process and the dimensional accuracy of the printed products, and at the same time make reasonable use of equipment space and improve the overall reliability of equipment operation.

[0022] In this invention, the above-described technical solutions can be combined with each other to achieve more preferred combinations. Other features and advantages of this invention will be set forth in the following description, and some advantages may become apparent from the description or be learned by practicing the invention. The objects and other advantages of this invention can be realized and obtained from what is particularly pointed out in the description and drawings. Attached Figure Description

[0023] The accompanying drawings are for illustrative purposes only and are not intended to limit the invention. Throughout the drawings, the same reference numerals denote the same parts.

[0024] Figure 1 is a flowchart of the automatic disassembly method for the substrate of the additive manufacturing equipment described in Example 1;

[0025] Figure 2 is one of the structural schematic diagrams of the automatic substrate disassembly device for additive manufacturing equipment in Example 2;

[0026] Figure 3 is a second schematic diagram of the automatic substrate disassembly device for additive manufacturing equipment in Example 2;

[0027] Figure 4 is an enlarged view of area A in Figure 3;

[0028] Figure 5 is a schematic diagram of the automatic nailing system in Example 2;

[0029] Figure 6 is a schematic diagram of the radial motion slide in Example 2;

[0030] Figure 7 is a schematic diagram of the lifting slide in Example 2;

[0031] Figure 8 is a schematic diagram of the lifting slide in Example 2;

[0032] Figure 9 is a schematic diagram of the stable nail removal assembly in Example 2;

[0033] Figure 10 is a structural schematic diagram of the nail gun mechanism in Embodiment 2;

[0034] Figure 11 is a schematic diagram of the walking system in Embodiment 2;

[0035] Figure 12 is a schematic diagram of the slider in Example 2;

[0036] Figure 13 is a schematic diagram of the slider in Example 3;

[0037] Figure 14 is one of the structural schematic diagrams of the steering assembly in Embodiment 4;

[0038] Figure 15 is a second schematic diagram of the steering assembly in Embodiment 4.

[0039] Figure label:

[0040] 1-Automatic nailing system; 11-Radial motion slide; 111-Slider adapter plate; 112-Linear guide module; 113-Sliding bearing plate; 114-Drive motor; 12-Lifting slide; 121-Lifting mounting plate; 122-Mounting upright plate; 123-Monitoring module; 13-Nailing gun mechanism; 131-Nailing motor; 132-Output shaft; 133-Adapter sleeve; 134-Bolt; 135-First spring; 136-Quick release pin; 137-Stabilizing nail removal assembly; 1371-Cage; 1372-Rolling bearing; 1373-Nail removal spring; 1374-Nail removal ring; 14-T-connecting block;

[0041] 2-Walking system; 21-Guide rail retainer; 22-Slider; 221-First roller; 222-Second roller; 2221-Second wheel body; 2222-Connecting shaft; 223-Mounting slot; 23-Annular guide rail; 24-Drive chain; 25-Chain motor; 26-Adjusting structure; 261-Push plate; 262-Second spring; 27-Steering assembly; 271-Rack; 272-Gear; 273-Rotating shaft; 274-Drive wheel; 275-Driven wheel; 276-Rotating chain;

[0042] 3-Cylinder block piston system, 31-Piston assembly, 32-Formed cylinder block;

[0043] 4-Baseboard, 41-Screw. Detailed Implementation

[0044] The preferred embodiments of the present invention will now be described in detail with reference to the accompanying drawings, which constitute a part of the present invention and are used together with the embodiments of the present invention to illustrate the principles of the present invention, but are not intended to limit the scope of the present invention.

[0045] Example 1

[0046] To address one of the problems in existing technologies, such as poor ease of assembly and disassembly of substrate 4, difficulty in removing deformed substrate 4, excessive force on screws 41, and impact on product dimensional accuracy, this invention provides an automatic disassembly method for substrate 4 in additive manufacturing equipment. This method uses an automatic screwing system 1 to identify and automatically remove multiple screws 41 from substrate 4, improving the convenience and efficiency of substrate 4 disassembly.

[0047] This invention provides an automatic disassembly method for substrates in additive manufacturing equipment, as shown in Figure 1, which includes the following steps:

[0048] Step 1: After printing is completed, the piston assembly 31 drives the forming substrate 4 to rise to the upper end of the cylinder.

[0049] Step 2: Automatic screw-on system 1 removes screws 41 from substrate 4.

[0050] This method uses the piston assembly 31 to lift the forming substrate 4 to the upper end of the cylinder, which puts the substrate 4 in a convenient and reasonable position for disassembly, reducing the difficulty of manual operation. At the same time, the automatic screw-screw system 1 replaces the manual removal of screws 41, which can significantly improve the disassembly efficiency of the substrate 4, reduce the labor intensity of manual labor, and meet the disassembly requirements of large substrates 4. Thus, it solves the core problems in the prior art that the disassembly and assembly difficulty increases after the size of large substrates 4 is enlarged, manual operation is time-consuming and laborious, and the torque is large and the operation is laborious when manually removing screws 41 of large substrates 4.

[0051] Furthermore, between step one and step two, there is also a step of adjusting the position of the automatic screwing system 1.

[0052] This method adds an automatic screw-tightening system 1 position adjustment step between the raising of the substrate 4 and the removal of the screw 41. This can achieve precise alignment of the automatic screw-tightening system 1 with the screw 41 on the substrate 4, ensuring a smooth disassembly process. At the same time, it indirectly reduces the probability of the substrate 4 and the accuracy of the printed product being further affected by disassembly operation errors. This solves the problem in the prior art that the lack of precise positioning measures before screw 41 removal can easily lead to positioning deviations that cause operation failures or component damage.

[0053] Furthermore, in step two, the specific steps involve the lifting slide 12 driving the nail gun mechanism 13 to descend, causing the bolt 134 to contact the head of the screw 41. This method, by smoothly lowering the nail gun mechanism 13 via the lifting slide 12, achieves precise and stable contact between the bolt 134 and the screw 41 head, preventing damage to the screw 41 head. This lays the foundation for subsequent successful loosening of the screw 41, ensures the stability of the disassembly process, reduces disassembly obstacles caused by screw 41 damage, and thus solves the problem of alignment deviations and uneven force leading to screw 41 head damage during manual nailing in existing technologies.

[0054] Furthermore, step two also includes starting the screw-tightening motor 131, which drives the bolt 134 to rotate and loosen the screw 41. This method, by using the screw-tightening motor 131 to drive the bolt 134 to rotate and loosen the screw 41, can precisely control the speed and force of loosening, improving the efficiency and stability of loosening the screw 41. It is suitable for disassembly scenarios where the screw 41 experiences high tensile stress due to warping and deformation of the substrate 4, thus solving the problems of insufficient torque, laborious operation, and uneven loosening rhythm in the prior art when manually loosening the screw 41.

[0055] Furthermore, step two also includes pausing the operation of the screw-tightening motor 131. When the torque drops to a set threshold, the screw-tightening motor 131 stops, the lifting slide 12 rises, and the stabilizing screw-removing component 137 completes the screw removal. This method, by monitoring torque and stopping it when the torque drops to a set threshold, combined with the lifting slide 12 and the stabilizing screw-removing component 137 to complete the screw removal, can avoid damage to components caused by excessive loosening, and prevent potential hazards such as screw 41 jamming or residue. It ensures that the screw 41 is smoothly removed from the substrate 4, improves the safety and integrity of the disassembly process, reduces component wear costs, and thus solves the problem in the prior art where the screw 41 is subjected to large tensile stress due to the warping and deformation of the substrate 4, and is prone to damage to the screw 41 and substrate 4 due to excessive loosening or improper operation during manual disassembly.

[0056] Furthermore, the method includes step three, in which the walking system 2 drives the automatic screw-screwing system 1 to move on the guide rail. This method, by having the walking system 2 drive the automatic screw-screwing system 1 to move on the guide rail, enables full-coverage disassembly of screws 41 at different positions on the large substrate 4, eliminating the need for manual handling or moving the screw-screwing equipment. This further improves the efficiency and convenience of disassembling the large substrate 4, adapting to the mass production needs of large additive manufacturing products. It also solves the problems of the dispersed distribution of screws 41 on the large substrate 4 in existing technologies, requiring frequent adjustments to their positions during manual disassembly, resulting in cumbersome and inefficient operations.

[0057] Furthermore, the method includes a fourth step: when the monitoring module 123 detects the screw 41 to be removed, it sends a signal to the control system, which then controls the walking system 2 to stop. This method, by having the monitoring module 123 detect the screw 41 to be removed and trigger the walking system 2 to stop, enables the automatic screw-tightening system 1 to accurately position the screw 41, reducing manual monitoring and positioning steps, improving the automation and accuracy of the disassembly process, and reducing rework costs and the risk of damage to the substrate 4 and the product due to missed screws or misoperation. This solves the problem of missed screws 41 or misoperation that easily occurs when manually disassembling large substrates 4 in existing technologies.

[0058] Furthermore, prior to step one, the automatic screw-in system 1 is in a non-working position. This method places the automatic screw-in system 1 in a non-working position before printing, thus avoiding interference with core printing operations such as laser scanning and toner application. This ensures the stability of the printing process and the dimensional accuracy of the printed product. Simultaneously, it makes efficient use of equipment space, improving the overall reliability of the equipment. This solves the problem in existing technologies where the interference from disassembling the equipment on the printing process is not considered, potentially affecting the accuracy of laser scanning and toner application, and consequently, the dimensional accuracy of the product.

[0059] Furthermore, the method includes step six: after all screws 41 on the substrate 4 are removed, the automatic screw-screwing system 1 moves to the non-working position. This method automatically returns the automatic screw-screwing system 1 to the non-working position after all screws 41 are removed, eliminating the need for manual reset and improving operational convenience. Simultaneously, it restores the equipment to its pre-printing state, ensuring smooth subsequent printing or disassembly operations and improving the continuity and standardization of the equipment's workflow. This solves the problems of manual reset required after disassembly in existing technologies, which are cumbersome and affect the continuity of the workflow.

[0060] Example 2

[0061] To address the issues of fixing and moving the automatic screw-on system 1, and to ensure its stable installation on the upper part of the cylinder and precise movement on the guide rail, thereby achieving accurate alignment of each of the distributed screws 41 on the substrate 4 and automatically removing the screws 41 from the substrate 4, this embodiment provides an automatic substrate removal device for additive manufacturing equipment as shown in Figures 2 and 3. It includes an automatic screw-on system 1 and a traveling system 2, with the traveling system 2 positioned on the upper part of the additive manufacturing equipment. The automatic screw-on system 1 is mounted on the traveling system 2.

[0062] The additive manufacturing equipment includes a cylinder piston system 3, which comprises a piston assembly 31 and a forming cylinder 32. The piston assembly 31 is disposed within the forming cylinder 32 and can move vertically. A substrate 4 is fixed to the top of the piston assembly 31. When the piston rises to the printing completion position, the substrate 4 is located on the upper end face of the forming cylinder 32. As shown in Figure 4, the substrate 4 is mounted on the upper end of the piston assembly 31 by hexagonal socket screws 41. The hexagonal socket screws 41 are evenly distributed around the substrate 4.

[0063] As shown in Figure 11, the walking system 2 includes a guide rail retainer 21, a slider 22, an annular guide rail 23, a transmission chain 24, and a chain motor 25. The guide rail retainer 21 is mounted on the upper edge of the forming cylinder 32, and the annular guide rail 23 is mounted on the guide rail retainer 21, serving to support the annular guide rail 23. The transmission chain 24 is arranged inside the annular guide rail 23, and the four corners of the transmission chain 24 are tensioned by sprockets. The drive sprocket rotates under the drive of the chain motor 25. The main body of the slider 22 is located on the annular guide rail 23. The slider 22 is equipped with rollers, allowing it to smoothly pass through the arc portion of the annular guide rail 23. The other end of the slider 22 has a pre-drilled chain pin hole, which can cooperate with the long pin of the chain link. A retaining spring is added to prevent it from falling off, thus achieving a fixed connection between it and one link of the transmission chain 24. Under the traction of the transmission chain 24, it makes a circular motion on the guide rail.

[0064] As shown in Figure 12, the slider 22 is further equipped with a first roller 221 and a second roller 222. The first roller 221 is located on the outer side of the annular guide rail 23, and the second roller 222 is located on the inner side of the annular guide rail 23. The second roller 222, located on the inner side of the annular guide rail 23, together with the first roller 221, clamps the guide rail, ensuring smooth operation of the slider 22 and preventing vertical swaying. The automatic screw-screw system 1 is fixed on the slider 22 and moves along the annular guide rail 23 to the target screw 41. It is precisely aligned using a vision positioning system to complete the screw 41 removal. The entire process is uniformly scheduled by the control system, achieving fully automatic and continuous operation, improving disassembly efficiency and the level of equipment intelligence.

[0065] Further, as shown in Figure 5, the automatic nailing system 1 includes a radial motion slide 11, a lifting slide 12, and a nailing gun mechanism 13; as shown in Figure 6, the radial motion slide 11 includes a slider adapter plate 111, a linear guide module 112, a sliding support plate 113, and a drive motor 114. The slider adapter plate 111 is mounted on the upper surface of the slider 22, the bottom surface of the linear guide module 112 is fixed to the slider adapter plate 111, and the sliding support plate 113 is connected to the linear guide module 112, allowing it to move linearly under the control of the drive motor 114. The radial motion slide 11 is mainly used to drive the upper lifting slide 12 to move forward or backward radially, ensuring that it avoids obstacles before the forming substrate 4 is lifted and removed.

[0066] Further, as shown in Figure 7, the lifting slide 12 includes: a lifting mounting plate 121, a mounting upright plate 122, and a monitoring module 123. The bottom of the mounting upright plate 122 is fitted with holes on the upper surface of the sliding support plate 113. The lifting mounting plate 121 can reciprocate in the vertical direction. The monitoring module 123 is mainly based on machine vision inspection methods. First, it captures images using a CCD industrial camera or a CMOS sensor, and then uses software to preprocess the images to identify the position of the screws 41 on the lower forming substrate 4.

[0067] As shown in Figures 8 and 10, the nail gun mechanism 13 includes: a nail-tightening motor 131, an output shaft 132, an adapter sleeve 133, a bolt 134, a first spring 135, a quick-release pin 136, and a stabilizing nail release assembly 137. The main body of the nail gun mechanism 13 is mounted on the lifting mounting plate 121, and the nail-tightening motor 131 is connected to the output shaft 132 and transmits power.

[0068] The adapter sleeve 133 has a square slot on its upper part, allowing it to mate with the output shaft 132 and be fixed in place by a quick-release pin 136. The bottom cavity of the adapter sleeve 133 is hollow and has a hexagonal groove, which mates with the head of the bolt 134 and transmits torque. A first spring 135 is installed between the head of the bolt 134 and the adapter sleeve 133. Through this flexible connection, as the screw 41 is gradually unscrewed and raised within the hole of the base plate 4, the first spring 135 compresses itself to accommodate the displacement of the bolt 134 in the height direction, preventing the screw-tightening gun mechanism 13 from being jammed and unable to unscrew the screw 41 during operation.

[0069] As shown in Figure 9, the stabilizing screw removal assembly 137 includes: a retainer 1371, a rolling bearing 1372, a screw removal spring 1373, and a screw removal ring 1374. The retainer 1371 is fixedly mounted on the lifting mounting plate 121. The rolling bearing 1372 is installed in conjunction with the bolt 134. The screw removal spring 1373 and the screw removal ring 1374 are sequentially installed at the bottom of the retainer 1371. The stabilizing screw removal assembly 137 has two main functions. Firstly, because the power input end and output end of the bolt 134 are far apart, it may deviate from the rotation center due to insufficient rigidity when performing high torque operations, resulting in large-scale swaying during screw tightening and a significant decrease in stability. Therefore, assembling the bolt 134 with the retainer 1371 through the rolling bearing 1372 can enhance its stability and guidance during rotation. Secondly, after the powder is removed, a small amount of metal powder may remain inside the head of the screw 41 on the substrate 4, causing the gap between the bolt end and the head of the screw 41 to be blocked by powder, making it impossible for the two to separate smoothly after being completely screwed out. The end of the nail-removing spring 1373 is fixedly installed on the inner wall of the nail-removing ring 1374. Before the screw-tightening mechanism is completely separated from the screw 41, the nail-removing spring 1373 remains compressed. When screw-tightening is complete, the lifting slide 12 gradually raises the screw-tightening mechanism, and the compression of the nail-removing spring 1373 is gradually released. The resulting elastic force causes the nail-removing ring 1374 to push the head of the screw 41 out of the end of the bolt 134, completing the automatic nail-removing action.

[0070] Example 3

[0071] The walking system 2 is set on the upper edge of the forming cylinder. The guide rail holder 21 and the annular guide rail 23 are both rectangular structures. The four corners of the guide rail holder 21 are rounded. In order to solve the problem that the roller on the slider 22 can pass smoothly through the connecting section, corner section and straight section at the corner, this embodiment, based on embodiment 2, further includes an adjustment structure 26. The adjustment structure 26 is used to provide thrust to the second roller 222 so that the second roller 222 always keeps in contact with the inner side of the annular guide rail 23.

[0072] As shown in Figure 13, the second roller 222 includes a second wheel body 2221 and a connecting shaft 2222. The second wheel body 2221 is rotatable on the connecting shaft 2222. The second roller 222 is disposed on the lower end face of the slider 22. The lower end face of the slider 22 has a mounting groove 223, and the upper top surface of the mounting groove 223 has a first sliding groove. The connecting shaft 2222 can slide within the first sliding groove, which is perpendicular to the extending direction of the annular guide rail 23. The adjusting structure 26 is disposed within the mounting groove 223.

[0073] The adjustment structure 26 includes a push plate 261 and a second spring 262. The second spring 262 is disposed between the push plate 261 and the inner wall of the mounting groove 223. The second spring 262 provides a pushing force to the push plate 261, which in turn provides a force to the push plate 261 on the annular guide rail 23. This ensures that the second roller 222 remains in close contact with the inner side of the annular guide rail 23 at different sections, including the connecting sections, corner sections, and straight sections, ensuring that the slider 22 runs smoothly on the entire annular guide rail 23 and avoiding vibration or jamming caused by gaps. Under the action of the second spring 262, the push plate 261 automatically compensates for changes in the gap between the roller and the guide rail, adapting to the transition of different curvature sections and improving the motion accuracy and reliability of the walking system 2. This structure is particularly suitable for the four corner arc connection areas of rectangular annular rails, effectively preventing roller derailment and ensuring continuous and stable operation of the equipment.

[0074] Example 4

[0075] During additive manufacturing, powder needs to be laid layer by layer on the upper surface of the substrate 4 and laser melting is performed. After product preparation, excess metal powder is removed. In order to further solve the problem of flying powder or residual powder entering the automatic screw-on system 1 and affecting the cleanliness and operational reliability of the automatic screw-on system 1 during the powder laying and cleaning process, this embodiment, based on embodiment 2 or 3, further includes a steering component 27 in the walking system 2.

[0076] The slider 22 is L-shaped and includes a horizontal plate and a vertical plate. The horizontal plate is located on the upper surface of the guide rail retainer 21, and the vertical plate is located on the outside of the guide rail retainer 21. A groove extending from the horizontal plate to the vertical plate is formed on the slider 22. The groove has a T-shaped cross-section. The automatic screw-on system 1 is slidably mounted in the groove via a T-shaped connecting block 14. The automatic screw-on system 1 moves in the groove of the horizontal plate, which can adjust the relative position of the automatic screw-on system 1 and the substrate 4 to adapt to the processing requirements of different sized forming areas. When the automatic screw-on system 1 moves from the groove of the horizontal plate to the groove of the vertical plate, the automatic screw-on system 1 turns, moving from above the substrate 4 to the side of the substrate 4. This position is the non-working position of the automatic screw-on system 1, freeing up working space for subsequent part removal or the next layer of powder spreading operation. The turning component 27 causes the automatic screw-on system 1 to retract to the outside of the guide rail retainer 21 when it is not in operation, effectively isolating metal dust and residual powder and improving the system's protection level. When the automatic nailing system 1 returns from the vertical plate to the horizontal plate along the T-shaped slide, it achieves a smooth return to its original position through the slide transition section during the turning process.

[0077] As shown in Figures 14 and 15, the steering assembly 27 includes a rack 271, a gear 272, a rotating shaft 273, a drive wheel 274, a driven wheel 275, and a rotating chain 276. The rack 271 is disposed on the upper end face of the guide rail retainer 21. The gear 272, rotating shaft 273, transmission gear, drive wheel 274, and rotating chain 276 are disposed on the slider 22. The rotating chain 276 is L-shaped and disposed on the path of the slide groove. The drive wheel 274 and the driven wheel 275 are disposed at both ends of the rotating chain 276. The drive wheel 274 is located at the front end of the horizontal plate, and the driven wheel 275 is located on the vertical plate. The gear 272 is rotatably disposed on the lower part of the horizontal plate. The gear 272 meshes with the rack 271. When the slider 22 moves to the position of the rack 271, the rack 271 drives the gear 272 to rotate, and the gear 272 drives the rotating shaft 273 to rotate. The rotating shaft 273 is provided with threads. There is a gear at the position corresponding to the thread on the drive wheel. During the rotation of the rotating wheel, the gear on the drive wheel is driven to rotate, and the rotation of the drive wheel drives the rotating chain 276 to rotate.

[0078] Furthermore, one end of the T-shaped connecting block 14 of the automatic screw-in system 1 is connected to the rotating chain 276. As the rotating chain 276 rotates, it moves from the horizontal plate groove to the vertical plate groove, thus rotating the automatic screw-in system 1 to the non-working position. When the automatic screw-in system 1 needs to return to the working position, it reverses the drive slider 22 to achieve reverse movement, and the rotating chain 276 rotates in the opposite direction, driving the automatic screw-in system 1 back up along the vertical plate groove to the horizontal plate groove, completing the switch from the non-working position to the working position. The entire turning process is smooth and continuous, reducing the probability of metal powder accumulation in the movement gap, effectively reducing the probability of jamming caused by dust accumulation, and improving the long-term stability of the system.

[0079] The above description is only a preferred embodiment of the present invention, but the scope of protection of the present invention is not limited thereto. Any changes or substitutions that can be easily conceived by those skilled in the art within the scope of the technology disclosed in the present invention should be included within the scope of protection of the present invention.

Claims

1. A method for automatically disassembling a substrate in additive manufacturing equipment, characterized in that, The process includes the following steps: Step 1: After printing is completed, the piston assembly (31) drives the forming substrate (4) to rise to the upper end of the cylinder; Step 2: The automatic screwing system (1) removes the screws on the substrate (4).

2. The automatic disassembly method for substrate of additive manufacturing equipment according to claim 1, characterized in that, Between step one and step two, there is also a step of adjusting the position of the automatic screwing system (1).

3. The automatic disassembly method for substrate of additive manufacturing equipment according to claim 2, characterized in that, The specific steps in step two are as follows: the lifting slide (12) drives the nail gun mechanism (13) to descend, so that the bolt (134) contacts the screw head.

4. The automatic disassembly method for substrate of additive manufacturing equipment according to claim 3, characterized in that, Step two also includes starting the screw-tightening motor (131), which drives the bolt (134) to rotate and loosen the screw.

5. The automatic disassembly method for substrate of additive manufacturing equipment according to claim 4, characterized in that, Step two also includes pausing the operation of the nail-tightening motor (131). When the torque drops to a set threshold, the nail-tightening motor (131) stops rotating, the lifting slide (12) is raised, and the stable nail-removing assembly (137) completes the nail removal.

6. The automatic disassembly method for substrate of additive manufacturing equipment according to claim 1, characterized in that, It also includes step three, where the walking system (2) drives the automatic screwing system (1) to move on the guide rail.

7. The automatic disassembly method for substrate of additive manufacturing equipment according to claim 6, characterized in that, It also includes step four, where when the monitoring module (123) detects the screw to be removed, the monitoring module (123) sends a signal to the control system, and the control system controls the walking system (2) to stop walking.

8. The automatic disassembly method for substrate of additive manufacturing equipment according to claim 7, characterized in that, Prior to step one, the automatic screwing system (1) is in a non-working position.

9. The automatic disassembly method for substrate of additive manufacturing equipment according to claim 8, characterized in that, It also includes step six, whereby the automatic screw-screw system (1) moves to the non-working position after all the screws on the substrate (4) have been removed.

10. An automatic substrate removal device for additive manufacturing equipment, characterized in that, The screws on the substrate (4) are removed by the method described in any one of claims 1 to 9.

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