Two-cylinder three-station metal 3D printer and using method

Abstract

The invention relates to the technical field of metal additive manufacturing, in particular to a two-cylinder three-station metal 3D printer and a using method.The two-cylinder three-station metal 3D printer comprises a main machine forming system, a powder cleaning and part taking system and a forming cylinder, and the main machine forming system comprises a first main frame, a forming bin, a cylinder body lifting mechanism, a piston jacking mechanism and a first cylinder body translation mechanism; the number of the powder cleaning and part taking systems is two, the number of the forming cylinders is two, the two powder cleaning and part taking systems are each provided with a second cylinder body translation mechanism, one set of forming cylinders are arranged on the first cylinder body translation mechanism, and the other set of forming cylinders are arranged on one set of second cylinder body translation mechanism. The first cylinder body translation mechanism and the second cylinder body translation mechanism are matched to drive the forming cylinder to move between the main machine forming system and the powder removing and part taking system. Through cooperation of the two forming cylinders and the two powder cleaning and part taking systems, the main machine forming system does not need to be stopped for waiting in the powder cleaning and part taking process, and the effects of being high in equipment utilization rate and high in part printing production efficiency are achieved.

Description

Technical Field

[0001] This application relates to the field of metal additive manufacturing technology, and in particular to a two-cylinder, three-station metal 3D printer and its usage method. Background Technology

[0002] Currently, the application fields of 3D printing technology have rapidly expanded to industries such as medical, electronics, aerospace, automotive manufacturing, and mold making. 3D printing, based on digital model files, constructs objects layer by layer. Its advantages lie in its ability to produce small batches of personalized custom parts at relatively low cost and high efficiency, achieving complex and intricate shapes. Furthermore, with the continuous expansion of metal 3D printing applications, customer demands have begun to shift towards high-efficiency and mass production, thus placing corresponding requirements on the utilization rate and printing efficiency of printing equipment.

[0003] There are two main types of metal 3D printing equipment on the market. One type has only one station, where the forming station, powder cleaning station, and part removal station are all located. In other words, the three processes of printing, powder cleaning, and part removal are all completed at this station. The other type has three stations on a larger-format metal 3D printer, which are set as the forming station, powder cleaning station, and part removal station. In use, a forming cylinder moves between the forming station, powder cleaning station, and part removal station to realize the three processes of forming, powder cleaning, and part removal of the part.

[0004] However, in actual use, since both of the above-mentioned metal 3D printing equipment use a forming chamber and a forming cylinder to perform printing operations, when the worker is cleaning the powder and picking up the part, the forming position cannot print and the machine must be stopped and waited until the powder cleaning and part picking are completed before the second printing can be carried out. The overall waiting time is long, resulting in problems with low equipment utilization and low part printing production efficiency. Summary of the Invention

[0005] To address the issue that existing 3D printing equipment requires downtime for powder cleaning and part removal processes, resulting in low overall equipment utilization and low part printing efficiency, this application provides a two-cylinder, three-station metal 3D printer and its usage method.

[0006] This application provides a two-cylinder, three-station metal 3D printer and its usage method, which adopts the following technical solution: In the first aspect, this application provides a two-cylinder, three-station metal 3D printer, which adopts the following technical solution: A two-cylinder, three-station metal 3D printer includes a main forming system, a powder cleaning and part-removing system, and forming cylinders. The main forming system includes a main frame, a forming chamber mounted on the main frame, a cylinder lifting mechanism, a piston lifting mechanism, and a cylinder translation mechanism mounted on the main frame. A piston plate is installed inside the forming cylinder, dynamically sealing against the inner wall of the forming cylinder. The piston lifting mechanism drives the piston plate to slide within the forming cylinder. Two sets of powder cleaning and part-removing systems and forming cylinders are provided, symmetrically arranged on both sides of the main forming system. Each set of powder cleaning and part-removing systems is equipped with a cylinder translation mechanism. One set of forming cylinders is mounted on the first cylinder translation mechanism, and the other set is mounted on one of the second cylinder translation mechanisms. The first and second cylinder translation mechanisms work together to drive the forming cylinders to move between the main forming system and the powder cleaning and part-removing system. The cylinder lifting mechanism drives the forming cylinders to disengage from the first cylinder translation mechanism.

[0007] By adopting the above technical solution, when the main forming system completes the printing operation, the forming cylinder carrying the product can be driven to a set of powder cleaning and part removal systems for powder cleaning and part removal through the cooperation of cylinder translation mechanism one and cylinder translation mechanism two. Meanwhile, the forming cylinder in the other set of powder cleaning and part removal systems is driven back to the main forming system for printing. That is, by using the two sets of forming cylinders and the two sets of powder cleaning and part removal systems in an alternating manner, the downtime of the main forming system is reduced during the powder cleaning and part removal process, thereby improving equipment utilization and part printing production efficiency.

[0008] Preferably, the forming cylinder includes a cylinder body and a base plate fixed to the bottom end of the cylinder body. A sealing plate is provided at the end of the cylinder body away from the base plate. An avoidance hole one is provided on the sealing plate, and an avoidance hole two is provided on the base plate. The piston plate abuts against the base plate.

[0009] By adopting the above technical solution, the subsequent transmission replacement of the forming cylinder is ensured without affecting the printing operation of the main forming system in the forming cylinder.

[0010] Preferably, the cylinder translation mechanism includes a mounting plate fixed on the main frame, a plurality of first guide rollers and second guide rollers rotatably mounted on the mounting plate, a drive assembly mounted on the mounting plate for driving the first guide rollers and second guide rollers to rotate synchronously, a guide wheel mounting seat fixed on the mounting plate, and a guide roller rotatably mounted on the guide wheel mounting seat. The mounting plate has a clearance hole three, which is correspondingly arranged with a clearance hole two. The first guide roller and the second guide roller are arranged around the clearance hole three, and the axis of the first guide roller and the axis of the second guide roller are parallel to each other.

[0011] By adopting the above technical solution, during use, the setting of the first guide roller, the second guide roller and the first guide roller, together with the third avoidance hole, can avoid affecting the lifting and lowering of the piston plate while realizing the normal transmission of the forming cylinder, thereby ensuring the normal printing of the main forming system.

[0012] Preferably, the cylinder lifting mechanism includes a screw jack mounted on the main frame, a top block mounted on the lifting shaft of the screw jack, and a second drive assembly mounted on the main frame. The second drive assembly is used to drive the lifting shaft of the screw jack to move up and down, and the top block forms an abutment fit with the base plate.

[0013] By adopting the above technical solution, in use, the combination of drive component two, screw lift and top block achieves the purpose of lifting the forming cylinder, thereby separating it from cylinder translation mechanism one.

[0014] Preferably, the piston lifting mechanism includes a support column mounted on the main frame, a support plate slidably connected to the support column, a bracket fixed on the support plate, and a driving assembly three for driving the support plate to slide. The bracket is provided with a piston positioning and clamping mechanism one. The bracket can slide through the clearance hole two and enter the forming cylinder, and dynamically clamp with the piston plate through the piston positioning and clamping mechanism one.

[0015] By adopting the above technical solution, during use, the three-drive component moves the tray and bracket, and in conjunction with the piston positioning and clamping mechanism, the piston plate can be raised and lowered, thereby ensuring the normal operation of the main unit forming system printing operation.

[0016] Preferably, the powder cleaning and part removal system includes a main frame, a column fixed on the main frame, a lifting platform slidably connected to the column, a powder cleaning chamber on the lifting platform, a powder cleaning position lifting mechanism on the column for driving the lifting platform to rise and fall, and a piston positioning and clamping mechanism on the column. The cylinder translation mechanism is located in the powder cleaning chamber. The powder cleaning chamber has a clearance hole four on the side facing the main forming system for the forming cylinder to pass through. The lifting platform has a clearance hole five. After the column passes through the clearance hole five, it is dynamically clamped to the forming cylinder by the piston positioning and clamping mechanism two.

[0017] By adopting the above technical solution, during use, the powder cleaning lifting mechanism and the lifting platform work together to drive the forming cylinder to descend, ensuring that the formed product and the piston plate remain stationary. This reduces the placement height of the product during the powder cleaning and part removal process, and also avoids quality loss during product movement, making it more convenient to use overall.

[0018] Preferably, the lifting platform is further provided with a pressing rod, a lower pressing block is fixed on the pressing rod, and an ear plate is provided on the forming cylinder, with the lower pressing block and the ear plate abutting against each other.

[0019] By adopting the above technical solution, the forming cylinder is pressed and limited by the cooperation of the clamping rod and the lowering block during use, thereby ensuring the stability of the forming cylinder during the descent of the lifting platform and facilitating subsequent powder cleaning and part removal operations.

[0020] Secondly, this application provides a method for using a two-cylinder, three-station metal 3D printer, comprising the following steps: A method for using a two-cylinder, three-station metal 3D printer includes the following steps: S1. Using cylinder translation mechanism one as a reference, adjust the height of cylinder translation mechanism two to ensure that cylinder translation mechanism one and the two sets of cylinder translation mechanisms two are in the same horizontal plane. S2. Place a forming cylinder on both the cylinder translation mechanism one and the first set of cylinder translation mechanisms two, and ensure that the center of the forming cylinder is aligned with the center of the clearance hole three and the clearance hole five, respectively. S3. The forming cylinder placed on the cylinder translation mechanism is driven to rise by the cylinder lifting mechanism until the sealing plate on the forming cylinder seals the forming chamber. S4. Start the piston lifting mechanism so that the bracket gradually rises and passes through the second clearance hole to clamp the piston plate together. Then, the rising bracket drives the piston plate to move up until the upper surface of the piston plate is located in the printing focusing plane in the forming chamber. After that, you can start washing the air, spreading the powder, and printing the parts layer by layer. S5. After printing is completed, the piston lifting mechanism drives the bracket and piston plate to descend synchronously. When the piston plate abuts against the base plate, the piston positioning and clamping mechanism separates from the piston plate, and the piston lifting mechanism continues to descend to return to its original position. S6. The cylinder lifting mechanism drives the forming cylinder to descend until the forming cylinder is placed back on the cylinder translation mechanism one, and the cylinder lifting mechanism returns to its original position after disengaging from the base plate. At this point, the main forming system completes the first printing operation. S7. The cylinder translation mechanism 1 and cylinder translation mechanism 2 work together to transfer the forming cylinder with the product to the set of cylinder translation mechanisms 2 that does not have a forming cylinder, and transfer the forming cylinder on the other set of cylinder translation mechanisms 2 to cylinder translation mechanism 1. After that, during the powder cleaning and part removal operation, the main forming system continues to print. After the part removal is completed, the powder cleaning position lifting mechanism drives the lifting platform, forming cylinder and piston plate to return to their original positions. S8. The main forming system repeats S3 to S7 to achieve cyclic cylinder changing printing operations.

[0021] By adopting the above technical solution, during use, the alternating cooperation of two forming cylinders and two sets of powder cleaning and part picking systems reduces the downtime of the main forming system during the powder cleaning and part picking process, thereby improving equipment utilization and part printing production efficiency. It is simple and efficient to use.

[0022] In summary, this application includes at least one of the following beneficial technical effects: 1. By using two sets of forming cylinders and two sets of powder cleaning and part picking systems in combination and alternately, the downtime of the main forming system is reduced during the powder cleaning and part picking process, thereby improving equipment utilization and part printing production efficiency. 2. The coordinated use of the first guide roller, the second guide roller, and the guide roller ensures the stability of the forming cylinder's transmission between the main forming system and the powder cleaning and part removal system; 3. By using the piston positioning and clamping mechanism, dynamic clamping or separation of the piston plate and the bracket is achieved. While ensuring that the piston plate can be driven to rise and fall stably, the piston plate and the bracket can also be separated, thereby avoiding the bracket from affecting the horizontal transmission of the forming cylinder. Attached Figure Description

[0023] Figure 1 This is an isometric schematic diagram of the main overall structure in Embodiment 1 of this application; Figure 2 This is a cross-sectional view of the main forming cylinder structure in Embodiment 1 of this application; Figure 3 This is a cross-sectional view of the main machine forming system in Embodiment 1 of this application; Figure 4 This is a schematic diagram of the structure of the cylinder translation mechanism, which is the main feature of Embodiment 1 of this application. Figure 5 This is a schematic diagram of the main supporting components in Embodiment 1 of this application; Figure 6 This is a schematic diagram of the cylinder lifting mechanism, which is the main feature of Embodiment 1 of this application. Figure 7 This is a schematic diagram of the piston lifting mechanism, which is the main feature of Embodiment 1 of this application. Figure 8 This is a schematic diagram of the piston positioning and clamping mechanism, which is the main feature of Embodiment 1 of this application. Figure 9 This is a schematic diagram illustrating the installation of the three drive components in Embodiment 1 of this application; Figure 10 This is an exploded view of the structure of the powder removal and part taking system, which is the main feature of Embodiment 1 of this application; Figure 11 This is an exploded view of the main structure of the cylinder translation mechanism 2 in Embodiment 1 of this application; Figure 12 This is a schematic diagram of the structure of the powder cleaning position lifting mechanism, which is the main feature of Embodiment 1 of this application; Figure 13 This is a schematic diagram illustrating the main equipment operation process in Embodiment 1 of this application; Figure 14 This is a schematic diagram illustrating the main reversing turntable installation structure in Embodiment 2 of this application; Figure 15 This is a schematic diagram illustrating the installation position of the maintenance feeding platform in Embodiment 2 of this application.

[0024] Reference numerals: 1. Main forming system; 11. Main frame one; 12. Forming chamber; 121. Feed inlet; 13. Cylinder lifting mechanism; 131. Screw jack; 132. Top block; 133. Drive assembly two; 1331. Servo motor two; 1332. Reducer two; 1333. Drive shaft; 1334. Coupling; 1335. Gearbox; 134. Lifting platform fixing plate; 135. Universal ball; 14. Piston lifting mechanism; 141. Support column; 142. Pallet; 143. Bracket; 144. Drive assembly Component 3; 1441, First lead screw; 1442, First driven gear; 1443, First drive gear; 1444, First synchronous toothed belt; 1445, First drive motor; 1446, First threaded sleeve; 15, Cylinder translation mechanism 1; 151, Mounting plate 1; 152, First guide roller; 153, Second guide roller; 154, Drive assembly 1; 155, Guide wheel mounting seat 1; 156, Guide roller 1; 157, Clearance hole 3; 158, Vertical plate; 159, Support roller; 2, Powder cleaning and part removal system; 21, Main frame 2; 22. Column; 221. Slide; 23. Lifting platform; 24. Powder cleaning hopper; 241. Glove; 25. Powder cleaning position lifting mechanism; 251. Second lead screw; 252. Nut seat; 253. Second driven gear; 254. Second driving gear; 255. Second synchronous toothed belt; 256. Second drive motor; 26. Piston positioning and clamping mechanism two; 27. Clearance hole four; 28. Clearance hole five; 3. Forming cylinder; 31. Cylinder body; 32. Base plate; 33. Sealing plate; 34. Clearance hole one; 35. Clearance hole two; 36. Ear plate; 4. Piston plate; 41. Conical locating pin; 5. Cylinder translation mechanism II; 51. Mounting plate II; 51. Clearance hole VI; 52. Third guide roller; 53. Fourth guide roller; 54. Drive assembly IV; 55. Guide wheel mounting seat II; 56. Guide roller II; 6. Piston positioning and clamping mechanism I; 61. Zero-point positioning chuck; 7. Pressing rod; 71. Lower pressing block; 8. Quick-connect plug; 9. Fixed seat; 91. Reversing turntable; 92. Third drive gear; 93. Third driven gear; 94. Third drive motor; 95. Maintenance and loading platform. Detailed Implementation

[0025] The following is in conjunction with the appendix Figure 1 -Appendix Figure 15 This application will be described in further detail.

[0026] This application discloses a two-cylinder, three-station metal 3D printer and its usage method.

[0027] Reference Figure 1 A two-cylinder, three-station metal 3D printer includes a main forming system 1, a powder cleaning and part picking system 2, and a forming cylinder 3. Both the powder cleaning and part picking system 2 and the forming cylinder 3 are provided in two sets. The main forming system 1 is located between the two sets of powder cleaning and part picking systems 2, which are symmetrically arranged on both sides of the main forming system 1. One set of forming cylinders 3 is located in the main forming system 1, and the other set of forming cylinders 3 is located in one set of powder cleaning and part picking systems 2. In this embodiment, the forming cylinder 3 is described as being located in the powder cleaning and part picking system 2 on the left side.

[0028] Reference Figure 1 and Figure 2 The forming cylinder 3 includes a cylinder body 31 and a bottom plate 32. In this application, the cylinder body 31 has a rectangular cylindrical structure that runs vertically through the cylinder body 31. The bottom plate 32 is fixed to the bottom end of the cylinder body 31 by bolts. A square clearance hole 2 35 is provided on the bottom plate 32. The opening size of the clearance hole 2 35 is smaller than the opening size of the bottom end of the cylinder body 31, that is, the inner wall of the bottom plate 32 protrudes from the inner wall of the cylinder body 31. A piston plate 4 is dynamically and slidably arranged inside the cylinder body 31. The bottom end of the piston plate 4 abuts against the bottom plate 32. A sealing plate 33 is fixedly connected to the top end of the cylinder body 31 by bolts. A square clearance hole 1 34 is provided on the sealing plate 33. The opening size of the clearance hole 1 34 is the same as the opening size of the top end of the cylinder body 31. A sealing ring is also fixed on the top surface of the sealing plate 33.

[0029] Reference Figure 1 and Figure 3 The main forming system 1 includes a main frame 11, a forming chamber 12, a cylinder lifting mechanism 13, a piston lifting mechanism 14, and a cylinder translation mechanism 15. The forming chamber 12 is located in the top area of ​​the main frame 11, the cylinder lifting mechanism 13 and the cylinder translation mechanism 15 are located in the middle area of ​​the main frame 11, and the piston lifting mechanism 14 is located in the bottom area of ​​the main frame 11. The forming chamber 12 and the cylinder lifting mechanism 13 are used to place the forming cylinder 3. The bottom side of the forming chamber 12 has a feed port 121 for the product to pass through. A laser scanning system and a powder feeding system are installed on the forming chamber 12. A powder spreading system is installed inside the forming chamber 12. A gas circulation system and an equipment control system are also installed on the main frame 11.

[0030] Reference Figure 1 and Figure 3In use, the forming cylinder 3 is placed on the cylinder translation mechanism 15, the substrate is placed on the piston plate 4 inside the forming cylinder 3, and the cylinder lifting mechanism 13 is located directly below the forming cylinder 3. First, the forming cylinder 3 is driven to rise by the cylinder lifting mechanism 13 until the sealing plate 33 blocks the feed port 121 of the forming chamber 12, and the gap between the sealing plate 33 and the forming chamber 12 is sealed by the sealing ring on the sealing plate 33. Then, the piston plate 4 is lifted by the piston lifting mechanism 14, so that the substrate on the piston plate 4 passes through the clearance hole 34 and enters the forming chamber 12. Thus, through the combined use of the gas circulation system, equipment control system, laser scanning system, powder feeding system and powder spreading system, the gas washing, powder spreading and layer-by-layer printing of parts are realized.

[0031] Reference Figure 3 and Figure 4 The cylinder translation mechanism 15 is used to drive the forming cylinder 3 horizontally. The cylinder translation mechanism 15 includes a mounting plate 151, a first guide roller 152, a second guide roller 153, a drive assembly 154, a guide wheel mounting seat 155, and a guide roller 156. The mounting plate 151 is fixed to the main frame 11 by bolts. An avoidance hole 157 is provided on the mounting plate 151, which is located directly below the feed inlet 121 of the forming chamber 12. Several first guide rollers 152 and several second guide rollers 153 are provided, and the several first guide rollers 152 and several second guide rollers 153 are distributed around the avoidance hole 157. The axes of the first guide rollers 152 and the second guide rollers 153 are parallel. The first guide rollers 152 and the second guide rollers 153 are rotatably mounted on the mounting plate 151.

[0032] Reference Figure 3 and Figure 4 Specifically, in this embodiment, six first guide rollers 152 are provided, and the six first guide rollers 152 are spaced apart along the length of the mounting plate 151. Three of the first guide rollers 152 are located on the left side of the clearance hole 157, and the other three are located on the right side of the clearance hole 157. Four second guide rollers 153 are provided, and the four second guide rollers 153 are divided into two groups, and the two groups of second guide rollers 153 are symmetrically arranged on the upper and lower sides of the clearance hole 157. In use, the forming cylinder 3 is placed on the first guide rollers 152 and the second guide rollers 153. The arrangement of the second guide rollers 153 in conjunction with the first guide rollers 152 ensures the stability of the forming cylinder 3 when it moves above the clearance hole 157. At the same time, a proximity sensor is also provided on the main frame 11. The proximity sensor is used to detect the position of the forming cylinder 3 to control the start or stop of the drive assembly 154, thereby ensuring that the forming cylinder 3 stops moving when it moves directly below the feed inlet 121.

[0033] Reference Figure 4The drive assembly 154 is mounted on the mounting plate 151. The drive assembly 154 is used to drive several first guide rollers 152 and several second guide rollers 153 synchronously. In this application, the drive assembly 154 adopts a motor and chain drive method; that is, through the cooperation of several chains and sprockets, all first guide rollers 152 and second guide rollers 153 are driven to rotate synchronously, thereby achieving the purpose of driving the forming cylinder 3.

[0034] Reference Figure 4 The guide wheel mounting base 155 is fixed to the mounting plate 151 by bolts. The guide roller 156 is rotatably connected to the guide wheel mounting base 155. The rotation axis of the guide roller 156 is parallel to the vertical direction. Several guide rollers 156 are provided. The several guide rollers 156 are evenly spaced along the transmission direction of the first guide roller 152. In use, the first guide roller 152 is used to support the bottom plate 32 of the forming cylinder 3 and to play a transmission role on the bottom plate 32. The guide roller 156 abuts against the side wall of the cylinder body 31 to play a role in limiting and assisting the transmission of the cylinder body 31.

[0035] Reference Figure 4 and Figure 5 To ensure stable rotation of the first guide roller 152 when the forming cylinder 3 is placed on it, a support assembly is also provided on the mounting plate 151. The support assembly provides support for the middle part of the first guide roller 152. The number of support assemblies is the same as the number of first guide rollers 152, and their positions correspond one-to-one. Each support assembly includes two sets of vertical plates 158 arranged opposite each other, and support rollers 159 rotating on the vertical plates 158. Each vertical plate 158 is provided with two support rollers 159, and the two support rollers 159 are symmetrically arranged on both sides of the first guide roller 152. The outer wall of the support roller 159 abuts against the outer wall of the first guide roller 152, and the axis of the support roller 159 and the first guide roller 152 are parallel. In use, the four support rollers 159 provide support for the middle part of the first guide roller 152, and the support rollers 159 can rotate without affecting the rotation of the first guide roller 152, which is more conducive to use.

[0036] Reference Figure 3 and Figure 6The cylinder lifting mechanism 13 includes a screw jack 131, a top block 132, a universal ball joint 135, and a second drive assembly 133. Several screw jacks 131 are provided, spaced apart on the main frame 11. Each screw jack 131 is bolted to the main frame 11 via a lifting fixing plate 134. In this embodiment, four screw jacks 131 are preferably provided, and these four screw jacks 131 are arranged around the clearance hole 157. Arranged in a rectangular array, each screw jack 131 has a top block 132 on its lifting shaft, and each top block 132 has several universal balls 135 rotatably mounted on it. The spherical surface of the universal balls 135 is used to abut against the bottom plate 32 of the forming cylinder 3. The drive assembly 133 is used to drive the lifting rods of several screw jacks 131 to rise and fall synchronously, thereby driving the top blocks 132 and universal balls 135 to rise and fall synchronously. In turn, the universal balls 135 support the forming cylinder 3 to achieve the purpose of driving the forming cylinder 3 to rise and fall.

[0037] Reference Figure 6 The drive assembly 133 includes a servo motor 1331, a reducer 1332, a drive shaft 1333, a coupling 1334, and a gear commutator 1335. Each pair of adjacent screw jacks 131 is connected via the drive shaft 1333 and the coupling 1334; that is, both ends of the drive shaft 1333 are connected to the input shaft of the screw jack 131 via a coupling 1334. The gear commutator 1335 cooperates with the drive shaft 1333 to realize the operation of the four rectangularly distributed screw jacks 131. Synchronous transmission is achieved by the cooperation of servo motor 1331 and reducer 1332 to drive the transmission shaft 1333. In use, the cooperation of servo motor 1331, reducer 1332, transmission shaft 1333, coupling 1334 and gear reversing device 1335 can drive the lifting rods of the four screw lifters 131 to extend synchronously from the gap between the first guide roller 152 and the second guide roller 153, thereby lifting the forming cylinder 3 placed on the first guide roller 152. It is simple and convenient to use.

[0038] Reference Figure 3 and Figure 7The piston lifting mechanism 14 is located directly below the clearance hole 34. The piston lifting mechanism 14 includes a support column 141, a support plate 142, a bracket 143, and a drive assembly 144. Two sets of support columns 141 are symmetrically arranged on the main frame 11. The support plate 142 is located between the two sets of support columns 141, and each side of the support plate 142 is slidably connected to one support column 141. The sliding direction of the support plate 142 is proportional to the height of the support column 141. The bracket 143 is parallel to the bottom of the support plate 142. A piston positioning and clamping mechanism 6 is also provided at the top of the bracket 143. The piston positioning and clamping mechanism 6 is used to dynamically clamp the piston plate 4. The drive component 144 is used to drive the support plate 142 to rise and fall, thereby driving the top of the bracket 143 to slide through the clearance hole 35 and enter the cylinder 31. Then, the piston plate 4 can be dynamically clamped by the piston positioning and clamping mechanism 6, thereby driving the piston plate 4 to rise and fall by the rise and fall of the bracket 143.

[0039] Reference Figure 7 and Figure 8 Specifically, the piston positioning and clamping mechanism 6 includes a zero-point positioning chuck 61. In this embodiment, four zero-point positioning chucks 61 are provided, and the four zero-point positioning chucks 61 are arranged in a rectangular array at the top of the bracket 143. Correspondingly, four conical positioning pins 41 are installed at the bottom of the piston plate 4. The four conical positioning pins 41 are arranged one-to-one with the four zero-point positioning chucks 61. The zero-point positioning chucks 61 are used to dynamically clamp the conical positioning pins 41. That is, the zero-point positioning chucks 61 and the conical positioning pins 41 form a zero-point positioning system. In use, when the bracket 143 drives the zero-point positioning chucks 61 to rise and fall to cooperate with the conical positioning pins 41, the conical positioning pins 41 can be clamped by the zero-point positioning chucks 61. The subsequent rising and falling of the bracket 143 can drive the piston plate 4 to rise and fall.

[0040] Reference Figure 7 and Figure 8 Meanwhile, since an electric heating wire is usually installed inside the piston plate 4 to heat the substrate on the piston plate 4, in order to power the electric heating wire inside the piston plate 4, in this embodiment, a quick-connect plug 8 is also provided at the top of the bracket 143, and a socket that mates with the quick-connect plug 8 is provided at the bottom of the piston plate 4; in use, the zero-point positioning system ensures the precise positioning and connection of the bracket 143 and the piston plate 4, thereby facilitating the subsequent electrical connection between the quick-connect plug 8 and the socket.

[0041] Reference Figure 7 and Figure 9Two sets of drive components 144 are provided, and each set of drive components 144 is respectively mounted on a support column 141. Each drive component 144 includes a first lead screw 1441 rotating on the support column 141, a first driven gear 1442 coaxially fixed on the first lead screw 1441, a first drive gear 1443 rotating on the support column 141, a first synchronous toothed belt 1444 wound around the first drive gear 1443 and the second drive gear, a first drive motor 1445 mounted on the support column 141 for driving the first drive gear 1443 to rotate, and a first threaded sleeve 1446 threadedly engaged with the first lead screw 1441. The first threaded sleeve 1446 is bolted to the support plate 142. The first drive gear 1443, the first driven gear 1442 and the first synchronous toothed belt 1444 are synchronously driven. In use, the two sets of drive components 144 work together to drive the support plate 142 to rise and fall simultaneously, ensuring the stability of the rise and fall of the support plate 142.

[0042] Reference Figure 1 and Figure 10 The powder cleaning and part removal system 2 is used by staff to perform powder cleaning and part removal operations on the products printed by the main forming system 1. The powder cleaning and part removal system 2 includes a second main frame 21, a column 22, a lifting platform 23, a powder cleaning chamber 24, a powder cleaning position lifting mechanism 25, and a piston positioning and clamping mechanism 26. The second main frame 21 and the first main frame 11 are detachably connected, and the two second main frames 21 and the first main frame 11 are linearly distributed. The column 22 is vertically set on the second main frame 21, and the bottom end of the column 22 is fixedly connected to the second main frame 21 by bolts. In this embodiment, the column 22 is set in a gantry frame shape. The lifting platform 23 slides along the height direction of the column 22 and is connected to the column 22. An avoidance hole 28 is opened on the lifting platform 23. During the lifting process of the lifting platform 23, the avoidance hole 28 is used to avoid the column 22.

[0043] Reference Figure 1 and Figure 10The powder cleaning chamber 24 is mounted on the lifting platform 23. A clearance hole 27 is provided on the side of the powder cleaning chamber 24 facing the main forming system 1, allowing the forming cylinder 3 to pass through. A powder suction mechanism is installed inside the powder cleaning chamber 24, and a glove 241 is mounted on the powder cleaning chamber 24. A cylinder translation mechanism 25 and a rubber rigid limit block are also installed inside the powder cleaning chamber 24. In use, after the main forming system 1 completes the printing operation, the cylinder translation mechanism 15 and the cylinder translation mechanism 25 work together to drive the cylinder carrying the product... The forming cylinder 3 is transferred from the cylinder translation mechanism 15 to the cylinder translation mechanism 25 until the forming cylinder 3 with the product comes into contact with the rubber hard limit block and is positioned. At this time, the forming cylinder 3 with the product is located directly above the clearance hole 28. Then, the forming cylinder 3 without the product in the other side powder cleaning and part taking system 2 is driven to move from the cylinder translation mechanism 25 to the cylinder translation mechanism 15 until the proximity sensor detects that the forming cylinder 3 without the product has moved directly below the feed port 121, and then the transmission of the forming cylinder 3 can be stopped.

[0044] Reference Figure 10 and Figure 11 The cylinder translation mechanism 25 and the cylinder translation mechanism 15 have the same structure, connection relationship and implementation principle. The cylinder translation mechanism 25 includes a mounting plate 251, a third guide roller 52, a fourth guide roller 53, a drive assembly 4 54, a guide wheel mounting seat 255 and a guide roller 256. The mounting plate 251 is fixed to the main frame 21 by bolts. An avoidance hole 6 511 is provided on the mounting plate 251. The avoidance hole 6 511 is corresponding to the avoidance hole 5 28. There are several third guide rollers 52 and several fourth guide rollers 53. The several third guide rollers 52 and several fourth guide rollers 53 are distributed around the avoidance hole 6 511. The axes of the third guide rollers 52 and the fourth guide rollers 53 are parallel. The third guide rollers 52 and the fourth guide rollers 53 are rotatably mounted on the mounting plate 251.

[0045] Reference Figure 10 and Figure 11 In this embodiment, three third guide rollers 52 are provided, and the three third guide rollers 52 are spaced apart along the length direction of the mounting plate 2 51. Two of the third guide rollers 52 are located on the right side of the clearance hole 6 511, and the other third guide roller 52 is located on the left side of the clearance hole 6 511. Four fourth guide rollers 53 are provided, and the four fourth guide rollers 53 are divided into two groups, and the two groups of fourth guide rollers 53 are symmetrically arranged on the upper and lower sides of the clearance hole 6 511. In use, the forming cylinder 3 is placed on the third guide rollers 52 and the fourth guide rollers 53. The arrangement of the third guide rollers 52 and the fourth guide rollers 53 ensures the stability of the forming cylinder 3 during movement.

[0046] Reference Figure 10 and Figure 11The drive assembly 4 54 is mounted on the mounting plate 2 51. The drive assembly 4 54 is used to drive several third guide rollers 52 and several fourth guide rollers 53 synchronously. In this application, the drive assembly 4 54 preferably adopts a combination of motor and chain drive structure; that is, through the cooperation of several chains and sprockets, all third guide rollers 52 and fourth guide rollers 53 are driven to rotate synchronously, thereby achieving the purpose of driving the forming cylinder 3.

[0047] Reference Figure 10 and Figure 11 The guide wheel mounting base 2 55 is fixed to the mounting plate 2 51 by bolts. The guide roller 2 56 is rotatably connected to the guide wheel mounting base 2 55. The rotation axis of the guide roller 2 56 is parallel to the vertical direction. Several guide rollers 2 56 are also provided, and the several guide rollers 2 56 are evenly spaced along the transmission direction of the third guide roller 52. In use, the third guide roller 52 is used to support the bottom plate 32 of the forming cylinder 3 and to transmit power to the bottom plate 32. The guide roller 2 56 abuts against the side wall of the cylinder body 31 to limit and assist the transmission of the cylinder body 31. In addition, a support assembly is also provided on the mounting plate 2 51. The number of support assemblies on the mounting plate 2 51 is the same as the number of the third guide roller 52, and the positions of the support assemblies correspond one-to-one. The support assembly is used to support the rotation of the third guide roller 52.

[0048] Reference Figure 10 and Figure 12 The powder cleaning position lifting mechanism 25 is mounted on the column 22. The powder cleaning position lifting mechanism 25 is used to drive the lifting platform 23 to slide in the vertical direction. The powder cleaning position lifting mechanism 25 includes a second lead screw 251 that rotates on the column 22, a nut seat 252 that slides on the column 22, a second threaded sleeve that is mounted on the nut seat 252, a second driven gear 253 that is coaxially fixedly connected to the second lead screw 251, a second driving gear 254 that rotates on the main frame, a second synchronous toothed belt 255 that cooperates with the second driven gear 253 and the second driving gear 254, and a second drive motor 256 that is mounted on the main frame 21 to drive the second driving gear 254 to rotate. The second threaded sleeve is threadedly engaged with the second lead screw 251, and the nut seat 252 is bolted to the lifting platform 23.

[0049] Reference Figure 10 and Figure 12A slide block 221 is slidably connected to the column 22. The slide block 221 slides along the height direction of the column 22. The slide block 221 is connected to the lifting platform 23 by bolts. In this embodiment, four slide blocks 221 are provided, and the four slide blocks 221 are symmetrically arranged in pairs around the column 22. In use, the second drive motor 256 drives the second drive gear 254 to rotate. Under the action of the second synchronous toothed belt 255, the second driven gear 253 rotates, thereby driving the second lead screw 251 to rotate. With the guide of the slide block 221 to the lifting platform 23, the purpose of driving the lifting platform 23 to rise and fall smoothly along the height direction of the column 22 can be achieved.

[0050] Reference Figure 12 In this application, four zero-point positioning chucks 61 are also provided at the top of the column 22, and the four zero-point positioning chucks 61 are distributed in a rectangular array. These four zero-point positioning chucks 61 are combined to form the piston positioning clamping mechanism 26. The piston positioning clamping mechanism 26 and the piston positioning clamping mechanism 1 6 have the same structure and operating principle. They are both used to cooperate with the tapered positioning pin 41 below the piston plate 4 to form a zero-point positioning system, thereby realizing the dynamic clamping and positioning of the piston plate 4.

[0051] Reference Figure 10 In addition, a clamping rod 7 is provided on the lifting platform 23. In this embodiment, four clamping rods 7 are provided, and the four clamping rods 7 are symmetrically arranged in pairs on the lifting platform 23. A lower pressing block 71 is welded and fixed to the top of the clamping rod 7. An ear plate 36 is bolted to the side wall of the cylinder body 31. The bottom end of the lower pressing block 71 and the upper end face of the ear plate 36 form an abutting fit. When the lifting platform 23 descends, the abutting fit between the clamping rod 7 and the ear plate 36 ensures the stability of the forming cylinder 3 during the lifting process. The piston plate 4 of the forming cylinder 3 is positioned at the top of the column 22 under the support and limit of the column 22, so that the product on the piston plate 4 gradually emerges from the top of the forming cylinder 3, and the product can then be cleaned and removed.

[0052] Reference Figure 13 A method for using a two-cylinder, three-station metal 3D printer includes the following steps: S1. Adjust the positions of cylinder translation mechanism 15 and cylinder translation mechanism 25. That is, take the upper generatrix of the first guide roller 152 of cylinder translation mechanism 15 as the reference, and adjust the height of the third guide roller 52 in cylinder translation mechanism 25 on both sides to ensure that the upper generatrix of the first guide roller 152 and the upper generatrix of the third guide roller 52 are in the same horizontal plane. S2. Place the two forming cylinders 3 in their respective positions. That is, place a forming cylinder 3 on the first guide roller 152 and ensure that it is directly below the feed inlet 121. Place a forming cylinder 3 on the third guide roller 52 in the set of cylinder translation mechanisms 25 on the left side and ensure that it is directly above the clearance hole 28. S3. Drive the forming cylinder 3 to rise to seal the feed port 121 of the forming chamber 12. That is, drive the forming cylinder 3 placed on the cylinder translation mechanism 15 to rise through the cylinder lifting mechanism 13, so that the bottom plate 32 of the forming cylinder 3 is separated from the first guide roller 152 until the sealing plate 33 of the upper section of the forming cylinder 3 abuts against the bottom wall of the forming chamber 12, thereby sealing the gap between the sealing plate 33 and the forming chamber 12 through the sealing ring on the sealing plate 33. S4. Drive the piston plate 4 upward to move the substrate into the forming chamber 12 to start printing. First, start the piston lifting mechanism 14 to make the bracket 143 gradually rise and pass through the clearance hole 35. When the conical positioning pin 41 at the bottom of the piston plate 4 is inserted into the zero-point positioning chuck 61, the zero-point positioning chuck 61 can be controlled to clamp the conical positioning pin 41, thereby clamping the bracket 143 and the piston plate 4 together. Then the bracket 143 continues to rise to move the piston plate 4 upward until the substrate on the piston plate 4 passes through the feed port 121 and enters the forming chamber 12. Then the air washing, powder spreading and layer-by-layer printing of parts can begin. S5. After printing is completed, the product, piston plate 4 and forming cylinder 3 are driven away from forming chamber 12. That is, the piston lifting mechanism 14 drives the bracket 143 and piston plate 4 to descend synchronously. The printed product and substrate descend synchronously with piston plate 4 until piston plate 4 abuts against bottom plate 32. Then, the zero point positioning chuck 61 is controlled to release the clamp on tapered positioning pin 41. After that, bracket 143 continues to descend and separate from piston plate 4 until bracket 143 descends to return to its original position. At this time, bracket 143 is disengaged from forming cylinder 3, and product and piston plate 4 are placed on bottom plate 32 of forming cylinder 3. S6. Control the forming cylinder 3 to descend onto the cylinder translation mechanism 15, that is, drive the forming cylinder 3, the internal piston plate 4, and the product to descend synchronously through the cylinder lifting mechanism 13 until the bottom plate 32 of the forming cylinder 3 is placed back on the first guide roller 152 and the second guide roller 153. At this time, the universal ball 135 in the cylinder lifting mechanism 13 completely detaches from the bottom plate 32 and returns to its original position. Thus, the main forming system 1 completes the first printing operation. S7. The forming cylinder 3 carrying the product is moved to the right-side powder cleaning and unloading system 2 for powder cleaning and unloading. First, the cylinder translation mechanism 15 moves the forming cylinder 3 carrying the product to the right until it partially moves onto the cylinder translation mechanism 25. Then, with the cooperation of the cylinder translation mechanism 25, the forming cylinder 3 carrying the product is gradually moved onto the right-side cylinder translation mechanism 25 until it comes into contact with the rubber hard limit block and stops. At this point, the forming cylinder 3 is directly above the clearance hole 28. Then, the powder cleaning lifting mechanism 25 drives the lifting platform 23 to descend. During the descent, the lowering block 71... The upper end of the sealing plate 33 of the forming cylinder 3 abuts against the forming cylinder 3 to ensure the stability of the forming cylinder 3 during the descent process. The lifting platform 23 descends synchronously, driving the forming cylinder 3, piston plate 4 and the printed product to descend synchronously until the piston plate 4 abuts against the column 22. Then, the tapered positioning pin 41 at the bottom of the piston plate 4 is clamped by the zero-point positioning chuck 61 to achieve the positioning of the piston plate 4. Subsequently, the lifting platform 23 drives the forming cylinder 3 to continue to descend. With the support and limit of the piston plate 4 by the column 22, the product gradually emerges from the clearance hole 34 at the top of the forming cylinder 3. After that, the worker can use gloves 241 and a powder suction device to clean the powder and remove the part. Another forming cylinder 3 is driven to the main forming system 1 for secondary printing. During the powder cleaning and part picking process, the cylinder translation mechanism 2 5 on the other side drives the empty forming cylinder 3 above it toward the main forming system 1. With the transmission action of the cylinder translation mechanism 1 15, the empty forming cylinder 3 can be driven onto the first guide roller 152 until the proximity sensor detects that the forming cylinder 3 has moved to the feed port 121 of the forming chamber 12. After the part picking is completed, the forming cylinder 3 is driven by the powder cleaning position lifting mechanism 25 to rise again to the position aligned with the cylinder translation mechanism 1 15, ready for subsequent use. S8, the main forming system 1 repeats S3 to S7 to achieve cyclic cylinder changing printing operation.

[0053] The implementation principle of this application embodiment is as follows: In use, a forming cylinder 3 is placed on both the cylinder translation mechanism 15 and one of the cylinder translation mechanisms 2 5. Then, the cylinder 31 is driven to rise by the cylinder lifting mechanism 13 to seal the feed port 121 through the sealing plate 33. Then, the piston plate 4 is driven to rise by the piston lifting mechanism 14 to block the clearance hole 1 34, so that the substrate is located in the forming chamber 12. At the same time, the dynamic seal of the piston plate 4 and the cylinder 31 ensures that the forming chamber 12 is in a sealed state. Subsequently, air washing, powder spreading, and part printing can be performed. After printing, the piston lifting mechanism 14 is controlled to descend to the bottom, so that the product completely leaves the forming chamber 12 and enters the forming cylinder 3, and the bracket 143 is removed from the forming cylinder 3. Then, the cylinder lifting mechanism 14 is driven to rise to block the clearance hole 1 34 through the piston lifting mechanism 14. 3. The forming cylinder 3 is driven down onto the cylinder translation mechanism 15 to ensure horizontal transmission of the forming cylinder 3. Then, through the cooperation of the cylinder translation mechanism 15 and the cylinder translation mechanism 2, the forming cylinder 3 carrying the product is transmitted to the powder cleaning and part picking system 2 on one side for powder cleaning and part picking. During the powder cleaning and part picking process, the forming cylinder 3 in the powder cleaning and part picking system 2 on the other side is transmitted to the main forming system 1, where printing can then be performed. That is, through the cooperation of two forming cylinders 3, one main forming system 1, and two sets of powder cleaning and part picking systems 2, the main forming system 1 can continue to change cylinders and print during the powder cleaning and part picking process without stopping and waiting, thereby improving equipment utilization and parts production efficiency, and also effectively solving the problem of structural stability of the equipment during the printing process.

[0054] Example 2: Reference Figure 14 The difference between Embodiment 2 and Embodiment 1 is that a fixed base 9 is fixedly installed on the main frame 11, and a clearance hole 7 is provided on the fixed base 9. A reversing turntable 91 is rotatably connected to the fixed base 9. The axis of the reversing turntable 91 is parallel to the vertical direction, and a clearance hole 8 is also provided at the axis of the reversing turntable 91. The clearance holes 7 and 8 are correspondingly provided with the feed inlet 121, that is, the clearance holes 7 and 8 and the feed inlet 121 are located on the same vertical line. The cylinder lifting... Mechanism 13 and cylinder translation mechanism 15 are both mounted on the reversing turntable 91. The clearance hole 7 is aligned with the clearance hole 3 157. A third drive gear 92 and a third driven gear 93 are rotatably connected on the fixed base 9. The third drive gear 92 and the third driven gear 93 mesh with each other. The third driven gear 93 is coaxially fixedly connected to the reversing turntable 91. A third drive motor 94 is also mounted on the fixed base 9. The output shaft of the third drive motor 94 is coaxially fixedly connected to the third drive gear 92.

[0055] Reference Figure 15Meanwhile, a maintenance loading platform 95 is also provided on the front side of the main forming system 1. In this embodiment, the line connecting the maintenance loading platform 95 and the main forming system 1 is perpendicular to the line connecting the powder cleaning and part taking system 2 and the main forming system 1. A set of cylinder translation mechanism 2 5 is also provided on the maintenance loading platform 95, and the transmission direction of this cylinder translation mechanism 2 5 is perpendicular to the transmission direction of cylinder translation mechanism 1 15. In use, the third drive motor 94 can drive the third drive gear 92 to rotate, thereby driving the third driven gear 93 to rotate, driving the reversing turntable 91 to rotate. When the reversing turntable 91 rotates to the point where the transmission direction of cylinder translation mechanism 1 15 is parallel to the transmission direction of cylinder translation mechanism 2 5 on the maintenance loading platform 95, the continued transmission of cylinder translation mechanism 1 15 and cylinder translation mechanism 2 5 on the maintenance loading platform 95 can realize the transmission of the forming cylinder 3 between the main forming system 1 and the maintenance loading platform 95.

[0056] The implementation principle of this application embodiment is as follows: During normal use, with the cooperation of two forming cylinders 3, a set of main forming system 1 and two sets of powder cleaning and part picking system 2, the cyclic cylinder changing printing operation is continuously performed. When the worker needs to maintain or replace one of the forming cylinders 3, the cylinder translation mechanism 15 is driven to rotate to the cylinder translation mechanism 2 aligning with the maintenance loading platform 95 through the cooperation of the third drive motor 94, the third drive gear 92 and the third driven gear 93, thereby transmitting the forming cylinder 3 to the maintenance loading platform 95. This allows the worker to replace the forming cylinder 3 without disassembling the printing equipment. At the same time, the new forming cylinder 3 can be placed on the cylinder translation mechanism 2 5 on the maintenance loading platform 95. Thus, by reversing the above process, the forming cylinder 3 is sent into the main forming system 1 for subsequent cyclic cylinder changing printing. The overall use is simple and convenient.

[0057] The above are all preferred embodiments of this application and are not intended to limit the scope of protection of this application. Therefore, all equivalent changes made in accordance with the structure, shape and principle of this application should be covered within the scope of protection of this application.

Claims

1. A two-cylinder, three-station metal 3D printer, characterized in that: The system includes a main forming system (1), a powder cleaning and part removal system (2), and a forming cylinder (3). The main forming system (1) includes a main frame (11), a forming chamber (12) mounted on the main frame (11), a cylinder lifting mechanism (13) and a piston lifting mechanism (14) mounted on the main frame (11), and a cylinder translation mechanism (15). The forming cylinder (3) is provided with a piston plate (4) that dynamically seals with the inner wall of the forming cylinder (3). The piston lifting mechanism (14) is used to drive the piston plate (4) to slide within the forming cylinder (3). Both the powder cleaning and part removal system (2) and the forming cylinder (3) are provided with two Two sets of powder removal and part taking systems (2) are symmetrically arranged on both sides of the main forming system (1). Each set of powder removal and part taking systems (2) is equipped with a cylinder translation mechanism two (5). One set of forming cylinders (3) is set on cylinder translation mechanism one (15), and the other set of forming cylinders (3) is set on one set of cylinder translation mechanism two (5). Cylinder translation mechanism one (15) and cylinder translation mechanism two (5) work together to drive the forming cylinders (3) to move between the main forming system (1) and the powder removal and part taking system (2). The cylinder lifting mechanism (13) is used to drive the forming cylinders (3) to disengage from cylinder translation mechanism one (15).

2. The two-cylinder, three-station metal 3D printer according to claim 1, characterized in that: The forming cylinder (3) includes a cylinder body (31) and a base plate (32) fixed to the bottom end of the cylinder body (31). A sealing plate (33) is provided at the end of the cylinder body (31) away from the base plate (32). An avoidance hole (34) is provided on the sealing plate (33), and an avoidance hole (35) is provided on the base plate (32). The piston plate (4) abuts against the base plate (32).

3. A two-cylinder, three-station metal 3D printer according to claim 2, characterized in that: The cylinder translation mechanism 1 (15) includes a mounting plate 1 (151) fixed on the main frame 1 (11), a plurality of first guide rollers (152) and second guide rollers (153) rotatably arranged on the mounting plate 1 (151), a drive assembly 1 (154) arranged on the mounting plate 1 (151) for driving the first guide rollers (152) and second guide rollers (153) to rotate synchronously, a guide wheel mounting seat 1 (155) fixed on the mounting plate 1 (151), and a guide roller 1 (156) rotatably arranged on the guide wheel mounting seat 1 (155). The mounting plate 1 (151) is provided with a clearance hole 3 (157). The clearance hole 3 (157) and the clearance hole 2 (35) are arranged correspondingly. The first guide rollers (152) and second guide rollers (153) are arranged around the clearance hole 3 (157), and the axis of the first guide roller (152) and the axis of the second guide roller (153) are arranged parallel to each other.

4. A two-cylinder, three-station metal 3D printer according to claim 2, characterized in that: The cylinder lifting mechanism (13) includes a screw jack (131) mounted on the main frame (11), a top block (132) mounted on the lifting shaft of the screw jack (131), and a second drive assembly (133) mounted on the main frame (11). The second drive assembly (133) is used to drive the lifting shaft of the screw jack (131) to move up and down. The top block (132) forms an abutment fit with the base plate (32).

5. A two-cylinder, three-station metal 3D printer according to claim 2, characterized in that: The piston lifting mechanism (14) includes a support column (141) mounted on the main frame (11), a support plate (142) slidably connected to the support column (141), a bracket (143) fixed on the support plate (142), and a drive assembly (144) for driving the support plate (142) to slide. The bracket (143) is provided with a piston positioning and clamping mechanism (6). The bracket (143) can slide through the clearance hole (35) and enter the forming cylinder (3), and dynamically clamp with the piston plate (4) through the piston positioning and clamping mechanism (6).

6. A two-cylinder, three-station metal 3D printer according to claim 1, characterized in that: The powder cleaning and part taking system (2) includes a main frame (21), a column (22) fixed on the main frame (21), a lifting platform (23) slidably connected to the column (22), a powder cleaning chamber (24) set on the lifting platform (23), a powder cleaning position lifting mechanism (25) set on the column (22) for driving the lifting platform (23) to rise and fall, and a piston positioning and clamping mechanism (26) set on the column (22). The cylinder translation mechanism (5) is set in the powder cleaning chamber (24). The powder cleaning chamber (24) has a clearance hole (27) on the side facing the main forming system (1) for the forming cylinder (3) to pass through. The lifting platform (23) has a clearance hole (28). The column (22) passes through the clearance hole (28) and is dynamically clamped to the forming cylinder (3) by the piston positioning and clamping mechanism (26).

7. A two-cylinder, three-station metal 3D printer according to claim 6, characterized in that: The lifting platform (23) is also provided with a pressing rod (7), and a lower pressing block (71) is fixed on the pressing rod (7). The forming cylinder (3) is provided with an ear plate (36), and the lower pressing block (71) and the ear plate (36) abut against each other.

8. A method of using a two-cylinder, three-station metal 3D printer, implemented using any one of claims 1 to 7, characterized in that... Includes the following steps: S1. Using cylinder translation mechanism one (15) as a reference, adjust the height of cylinder translation mechanism two (5) to ensure that cylinder translation mechanism one (15) and the two sets of cylinder translation mechanism two (5) are in the same horizontal plane. S2. Place a forming cylinder (3) on both the cylinder translation mechanism one (15) and the first set of cylinder translation mechanism two (5), and ensure that the center of the forming cylinder (3) is aligned with the center of the clearance hole three (157) and the clearance hole five (28) respectively. S3. The forming cylinder (3) placed on the cylinder translation mechanism (15) is driven to rise by the cylinder lifting mechanism (13) until the sealing plate (33) on the forming cylinder (3) seals the forming chamber (12). S4. Start the piston lifting mechanism (14) so ​​that the bracket (143) gradually rises and passes through the second clearance hole (35) to clamp together with the piston plate (4). Then, the piston plate (4) moves up through the rise of the bracket (143) until the upper end face of the piston plate (4) is located in the printing focusing plane in the forming chamber (12). After that, the air washing, powder spreading and layer-by-layer printing of parts can begin. S5. After printing is completed, the piston lifting mechanism (14) drives the bracket (143) and piston plate (4) to descend synchronously. When the piston plate (4) abuts against the base plate (32), the piston positioning clamping mechanism (6) separates from the piston plate (4), and the piston lifting mechanism (14) continues to descend to return to its original position. S6. The cylinder lifting mechanism (13) drives the forming cylinder (3) to descend until the forming cylinder (3) is placed back on the cylinder translation mechanism (15), and the cylinder lifting mechanism (13) returns to its original position after being separated from the base plate (32). At this point, the main forming system (1) completes the first printing operation. S7. The cylinder translation mechanism 1 (15) and cylinder translation mechanism 2 (5) work together to transfer the forming cylinder (3) with the product to a set of cylinder translation mechanisms 2 (5) without the forming cylinder (3), and transfer the forming cylinder (3) on another set of cylinder translation mechanisms 2 (5) to cylinder translation mechanism 1 (15). After that, during the worker's powder cleaning and part removal operation, the main forming system (1) continues to perform printing operation. After the part removal is completed, the powder cleaning position lifting mechanism (25) drives the lifting platform (23), forming cylinder (3) and piston plate (4) to return to their original positions. S8, Main forming system (1) Repeat S3 to S7 to realize the cyclic cylinder changing printing operation.

Images