Galvanometer flying type ultra-large selective laser melting (SLM) forming equipment

Abstract

The invention relates to galvanometer flying type ultra-large selective laser melting (SLM) forming equipment which comprises a forming chamber assembly, a forming cylinder assembly, a forming cylinder driving assembly, a powder cleaning and part taking assembly, an equipment supporting frame assembly, a lifting assembly and a control cabinet assembly. The forming chamber assembly comprises a forming chamber cavity, a left flying assembly, a left flying driving assembly, a right flying assembly, a right flying driving assembly, a powder falling assembly, a scraper assembly and a gas circulation assembly. The left flying assembly and the right flying assembly move left and right in the forming chamber cavity to a half of a printing area for part printing. The powder falling assembly and the scraper assembly are both located on the rear side of the forming chamber cavity. Printing and dust removal in the ultra-large breadth machining process are achieved, and a stable wind field system is formed in the printing process; each flying assembly only moves left and right in half of the printing area, so that the printing efficiency is improved; and the powder falling assembly and the scraper assembly are separated from the flying assembly, so that setting of powder laying monitoring is facilitated, and the powder laying effect is checked.

Description

Technical Field

[0001] The present invention belongs to the technical field of additive manufacturing, and particularly relates to a galvanometer flying type super-large selective laser melting (SLM) forming device. Background Art

[0002] Metal 3D printing technology is the common name of metal additive manufacturing technology. It refers to a technology that constructs metal parts by layer-by-layer printing based on the principle of discrete-accumulation, using three-dimensional digital model files and program commands, and applying powdered or filamentous metal materials.

[0003] Selective laser melting (SLM) is a method for directly forming metal parts and is the latest development of additive manufacturing technology. This technology is based on the most basic idea of rapid prototyping, that is, the "incremental" manufacturing method of layer-by-layer cladding. It directly forms parts with specific geometric shapes according to three-dimensional CAD models. During the forming process, the metal powder is completely melted to produce metallurgical bonding. Metal parts with complex shape structures that cannot be manufactured by traditional machining means are one of the main application directions of laser rapid prototyping technology.

[0004] For existing multi-beam selective laser melting devices at home and abroad, the increase in the number of beams means an increase in the number of splicing areas. Calculated based on a rectangular layout, there are 4 splicing areas for 4 beams, 12 for 9 beams, 24 for 16 beams, and 40 for 25 beams. The splicing quality is related to many factors such as the temperature drift during long-term operation of the galvanometer and the stability of the mechanical structure. The more splicing areas there are, the greater the difficulty in ensuring splicing quality and the higher the risk of product quality problems.

[0005] In current mainstream large-format printing devices, most devices adopt the "through-flow" air field mode with air inlet on one side and air outlet on the other side. In the "through-flow" air field mode, when the air field span is small, the air field quality of the entire format can be better guaranteed. However, when the air field span is large, exceeding 800 mm, since the wind speed at the air outlet is very low, it cannot effectively carry away the black slag generated during printing; if the fan wind speed is further increased, it may cause the problem that the wind speed at the air inlet is too large and affects the powder spreading quality. When the air field span reaches 1500 mm, this problem becomes more obvious.

[0006] In addition, for devices with a format exceeding 1500×1500 mm, the weight of a 200-mm-thick stainless steel substrate reaches about 3.5 tons. Adding a full bin of powder, the load exceeds 20 tons. At the same time, the design of the Z-axis mechanical structure also needs to consider a series of factors such as the stable connection between the transmission mechanism and the heating plate, the stable connection between the heating plate and the forming substrate, the dynamic seal between the Z-axis mechanical structure and the forming chamber, and the accuracy and reliability of the 1500×1500-mm large format with a step of 0.03 - 0.06 mm each time. Therefore, it is extremely difficult to ensure the long-term working stability and reliability of the Z-axis mechanical structure. Summary of the Invention

[0007] Aiming at the problems existing in the prior art, the present invention provides a galvanometer flying type ultra-large selective laser melting (SLM) forming device. Through the flying scanning galvanometer and the movable wind field structure, the number of galvanometers is reduced and the span of the wind field is shortened; the forming cylinder driving assembly adopts a direct-connected double-drive structure to drive the piston assembly to move up and down, realizing the long-term working stability and reliability of the Z-axis; through the m*2 type double-row galvanometer arrangement, the number of modules such as lasers and galvanometer field lenses in the optical system is reduced, reducing the equipment cost input while meeting the requirements, improving the printing efficiency, and enabling the printing of 3D metal products with a larger cross-sectional area; solving various difficulties that cannot be achieved by traditional solutions, thereby realizing the printing quality and stability of ultra-large format printing equipment.

[0008] The present invention is implemented as follows. A galvanometer flying type ultra-large selective laser melting (SLM) forming device includes a forming chamber assembly, a forming cylinder assembly, a forming cylinder horizontal moving assembly, a powder cleaning and part taking assembly, an equipment support frame assembly, a lifting assembly, and a control cabinet assembly; the forming chamber assembly is connected to the upper right of the equipment support frame assembly, the forming cylinder assembly is located below the forming chamber assembly, and the forming cylinder horizontal moving assembly is used to drive the forming cylinder assembly to move from the printing station to the powder cleaning and part taking station; the powder cleaning and part taking assembly is connected to the upper left of the equipment support frame assembly to realize the powder cleaning and part taking operation of the part after printing; the lifting assembly is located between the forming chamber assembly and the powder cleaning and part taking assembly, used to avoid the horizontal movement of the forming cylinder assembly after printing, and at the same time provide an operation platform for the operator to clean the part powder; the control cabinet assembly is used for controlling each component during the operation of the equipment;

[0009] The forming chamber assembly includes a forming chamber cavity, a left flying assembly, a left flying driving assembly, a right flying assembly, a right flying driving assembly, a powder falling assembly, a scraper assembly, and a gas circulation assembly. The left flying driving assembly and the right flying driving assembly are arranged on the front side and the rear side of the forming chamber cavity respectively. The left flying assembly is driven by the left flying driving assembly, and the right flying assembly is driven by the right flying driving assembly, so that the left flying assembly and the right flying assembly move left and right in the forming chamber cavity to half of the printing area for part printing; the powder falling assembly and the scraper assembly are both located at the rear side of the forming chamber cavity. The powder falling assembly is used to supply powder to the scraper assembly, and the scraper assembly moves back and forth for powder spreading before printing; the gas circulation assembly is connected to the forming chamber cavity through the inlet and outlet gas pipelines to realize the gas circulation flow during the operation of the equipment;

[0010] The forming cylinder assembly includes a forming cylinder body, a double vertical drive module, a double cantilever support, a piston assembly, and a bearing block; the vertical drive module is installed on the left and right sides of the forming cylinder body and at the bottom of the forming cylinder body, and the double cantilever support is installed on each vertical drive module. The double cantilever support penetrates into the forming cylinder body and is connected to the piston assembly. The motors of the double vertical drive module work to drive the double cantilever supports on the left and right sides to push the piston assembly in the forming cylinder body to move up and down.

[0011] In the above technical solution, preferably, the left flying assembly and the right flying assembly have the same structure, including a processing cavity, a galvanometer module, and a wind field structure; the galvanometer module is installed above the processing cavity, and the wind field structure includes an air inlet and an air outlet, and the air inlet and the air outlet are respectively installed on the left and right sides of the processing cavity; two air inlets are provided, which are respectively located at the bottom and the middle of the processing cavity; the air outlet is located at the bottom of the processing cavity.

[0012] In the above technical solution, further preferably, the processing cavity is composed of a cavity left plate, a cavity right plate, a cavity front plate, a cavity rear plate, and a cavity top plate; cavity observation windows are respectively provided on the cavity front plate, the cavity left plate, and the cavity right plate.

[0013] In the above technical solution, further preferably, air distribution pipelines are respectively provided inside the air inlet and the air outlet.

[0014] In the above technical solution, further preferably, the galvanometer module is arranged in a single row or a double row at equal intervals by multiple groups of galvanometer structures.

[0015] In the above technical solution, preferably, the forming chamber cavity is composed of a forming chamber bottom plate, a forming chamber left side plate, a forming chamber right side plate, a forming chamber front side plate, a forming chamber rear side plate, and a forming chamber top plate; the left flying drive assembly and the right flying drive assembly are both installed on the forming chamber bottom plate through a drive assembly support frame and connected to the corresponding flying module to realize the left and right movement of the left and right two flying modules in the forming chamber cavity; the powder dropping assembly and the scraper assembly are both installed on the forming chamber top plate.

[0016] In the above technical solution, further preferably, the left flight drive assembly and the right flight drive assembly have the same structure, including a flight drive motor, a coupling, a ball screw, a nut, a flight bearing seat, and a linear guide rail; the drive motor is connected to the ball screw through the coupling to drive the ball screw to rotate. Both ends of the ball screw are installed on the drive assembly support frame through the flight bearing seat. The nut is installed on the ball screw. The rotation of the ball screw drives the nut to move. The nut is connected to the support of the corresponding flight assembly. The linear guide rail is installed on the drive assembly support frame, and the linear guide rail slider is connected to the support of the corresponding flight assembly, so that the flight assembly moves left and right under the double drive of the nut and the linear guide rail slider of the flight drive assembly;

[0017] The left flight drive assembly and the right flight drive assembly located on the front side share a pair of linear guide rails, and the left flight drive assembly and the right flight drive assembly located on the rear side share a pair of linear guide rails.

[0018] In the above technical solution, further preferably, the powder dropping assembly includes a powder dropping tank, a powder dropping bin, and a powder dropping shaft. The powder dropping tank is installed above the powder dropping bin. The powder outlet of the powder dropping tank is connected to the powder inlet of the powder dropping bin. A powder dropping shaft for controlling the powder dropping amount is arranged in the powder dropping bin. The powder outlet of the powder dropping bin is connected to the powder dropping port of the scraper assembly. The scraper assembly is driven to move back and forth by linear drive modules located on the left and right sides of the printing area. The linear drive modules are embedded in the bottom plate of the forming chamber.

[0019] In the above technical solution, further preferably, the top plate of the forming chamber, the left side plate of the forming chamber, the front side plate of the forming chamber, and the rear side plate of the forming chamber are all installed with sealed chamber doors. The front side plate of the forming chamber and the rear side plate of the forming chamber are also installed with forming chamber observation windows and operating gloves.

[0020] In the above technical solution, preferably, the lifting assembly includes a lifting platform, a lifting drive motor, and an up and down movement guide rail; the lifting platform is installed on the up and down movement guide rail through a bracket. The lifting drive motor and the up and down movement guide rail are installed on the equipment support frame assembly. The lifting drive motor drives the lifting platform to move up and down through a chain or a belt.

[0021] In the above technical solution, preferably, the horizontal movement assembly of the forming cylinder includes a cylinder moving slide plate, a horizontal drive module, a base, a gear rack, and a horizontal linear guide rail. The cylinder moving slide plate is installed on the base through the linear guide rail. The horizontal drive module is installed on the cylinder moving slide plate. The horizontal drive module drives the cylinder moving slide plate to drive the forming cylinder assembly to move left and right through a speed reducer and a gear rack.

[0022] The advantages and positive effects of the present invention are:

[0023] 1. The present invention realizes the left - right mobile printing above the printing area by arranging two flying components, left and right, in the forming chamber assembly and driving them respectively through their own flying drive components, achieving printing and dust removal during the ultra - large - format processing. A stable wind field system is formed during the printing process, avoiding the problem that soot cannot be removed in time in traditional matrix - arranged equipment. Moreover, each flying component only moves about half of the printing area, improving the printing efficiency. Separating the powder - dropping component and the scraper component from the flying component is beneficial for setting powder - spreading monitoring and inspecting the powder - spreading effect.

[0024] 2. The forming cylinder drive component of the present invention adopts a direct - connection dual - drive structure to drive the piston component to move up and down, realizing the stability and reliability of the Z - axis during long - term operation. The designed flying component adopts an m * 1 - column or m * 2 - column galvanometer arrangement, reducing the number of modules such as lasers and galvanometer field lenses in the optical system. While meeting the requirements, it greatly reduces the investment in equipment costs, improves the printing efficiency, and can print 3D metal products with a larger cross - sectional area at the same time. It solves various difficulties that cannot be achieved by traditional solutions, thus realizing the printing quality and stability of ultra - large - format printing equipment.

[0025] 3. The lifting component designed by the present invention has the lifting drive motor driving the lifting platform to move up and down through a chain or a belt, realizing the lifting movement of the lifting platform. The transmission efficiency is high. At the same time, the chain has a certain elasticity, which can absorb impacts and vibrations, ensuring the smoothness and reliability of the transmission. The lifting component can be fixed to the forming equipment. The fixing method is simple, easy to disassemble, occupies little space, can be suspended, and has universality, solving the problem that there is no space for operators to clean powder and pick up parts between the picking chamber and the forming chamber for ultra - large - format parts. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] Figure 1 is a schematic structural diagram of the selective laser melting (SLM) forming equipment provided by an embodiment of the present invention;

[0027] Figure 2 is a schematic structural diagram of the two flying components, left and right, in their initial positions on both sides provided by an embodiment of the present invention;

[0028] Figure 3 is a schematic structural diagram of the two flying components, left and right, in their printing start positions provided by an embodiment of the present invention;

[0029] Figure 4 is a schematic structural diagram of the two flying components, left and right, in their printing end positions provided by an embodiment of the present invention;

[0030] Figure 5 is a schematic structural diagram of the two flying components, left and right, in their positions after returning to the initial positions after printing completion provided by an embodiment of the present invention;

[0031] Figure 6 It is a schematic structural diagram of a forming cylinder assembly provided by an embodiment of the present invention;

[0032] Figure 7 It is a schematic structural diagram of a flight assembly provided by an embodiment of the present invention;

[0033] Figure 8 It is a schematic structural diagram of a lifting assembly provided by an embodiment of the present invention;

[0034] Figure 9 It is a schematic structural diagram of a forming cylinder horizontal movement assembly provided by an embodiment of the present invention.

[0035] In the figure: 10, forming chamber assembly; 101, forming chamber cavity; 102, right flight drive assembly; 103, right flight assembly; 104, powder dropping assembly; 105, left flight assembly; 106, scraper assembly; 107, left flight drive assembly; 1021, flight drive motor; 1022, coupling; 1023, flight bearing seat; 1024, ball screw; 1025, linear guide rail; 1031, processing cavity; 1032, galvanometer module; 1033, upper air inlet; 1034, lower air inlet; 1035, air outlet; 1041, powder dropping tank; 1042, powder dropping bin; 1043, powder dropping shaft; 1061, linear drive module;

[0036] 20, forming cylinder assembly; 201, forming cylinder body; 202, vertical drive module; 203, double cantilever support; 204, piston assembly; 205, forming cylinder bearing seat;

[0037] 30, equipment support frame assembly;

[0038] 40, forming cylinder horizontal movement assembly; 401, base; 402, horizontal linear guide rail; 403, horizontal drive module; 404, gear rack; 405, cylinder moving slide plate;

[0039] 50, powder cleaning and part taking assembly; 501, sealed bin door; 502, operating gloves; 503, top plate;

[0040] 60, lifting assembly; 601, lifting platform; 602, up and down movement guide rail; 603, lifting drive motor;

[0041] 70, control cabinet assembly. Detailed implementation manners

[0042] In order to make the objectives, technical solutions and advantages of the present invention more clear and understandable, the following further details the present invention in conjunction with embodiments and with reference to the accompanying drawings. Those skilled in the art should be aware that the following specific embodiments or specific implementation manners are a series of optimized setting manners enumerated by the present invention to further explain the specific inventive content, and these setting manners can be combined with each other or used in association with each other, unless it is clearly stated in the present invention that some or a certain specific embodiment or implementation manner cannot be associated or used jointly with other embodiments or implementation manners. At the same time, the following specific embodiments or implementation manners are only used as the optimized setting manners and are not used as an understanding for limiting the protection scope of the present invention.

[0043] In the description of the present invention, it should be understood that the orientation or positional relationship indicated by the terms "upper", "lower", "front", "rear", "left", "right", "top", "bottom", "inner", "outer", etc. is based on the orientation or positional relationship shown in the accompanying drawings, and is only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be construed as a limitation to the present invention.

[0044] In the description of the present invention, it should be noted that unless otherwise clearly specified and limited, the terms "connected" and "coupled" should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be directly connected or indirectly connected through an intermediate medium, and it can be the communication inside two elements. For those of ordinary skill in the art, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0045] Please refer to Figures 1 to 9 , this embodiment provides a galvanometer flying type ultra-large selective laser melting (SLM) forming device, including a forming chamber assembly 10, a forming cylinder assembly 20, a forming cylinder horizontal movement assembly 40, a powder cleaning and part taking assembly 50, a device support frame assembly 30, a lifting assembly 60, and a control cabinet assembly 70. The forming chamber assembly 10 is connected to the upper right of the device support frame assembly 30, the forming cylinder assembly 20 is located below the forming chamber assembly 10, and the forming cylinder horizontal movement assembly 40 is used to drive the forming cylinder assembly 20 to move from the printing station to the powder cleaning and part taking station; the powder cleaning and part taking assembly 50 is connected to the upper left of the device support frame assembly 30 to realize the powder cleaning and part taking operation of the part after printing; the lifting assembly 60 is located between the forming chamber assembly 10 and the powder cleaning and part taking assembly 50, and is used to avoid the horizontal movement of the forming cylinder assembly 20 after printing, and at the same time provide an operation platform for the operator to clean the powder of the part; the control cabinet assembly 70 is used to control each assembly during the operation of the device.

[0046] The forming chamber assembly 10 includes a forming chamber cavity 101, a left flying assembly 105, a left flying drive assembly 107, a right flying assembly 103, a right flying drive assembly 102, a powder dropping assembly 104, a scraping blade assembly 106, and a gas circulation assembly. The left flying drive assembly 107 and the right flying drive assembly 102 are provided on both the front side and the rear side of the forming chamber cavity 101. The left flying assembly 105 is driven by the left flying drive assembly 107, and the right flying assembly 103 is driven by the right flying drive assembly 102, so that the left flying assembly 105 and the right flying assembly 103 move left and right in the forming chamber cavity 101 to half of the printing area for part printing. The powder dropping assembly 104 and the scraping blade assembly 106 are both located at the rear side of the forming chamber cavity 101. The powder dropping assembly 104 is used to supply powder to the scraping blade assembly 106, and the scraping blade assembly 106 moves back and forth for powder spreading before printing. The gas circulation assembly is connected to the forming chamber cavity 101 through the inlet and outlet gas pipelines to realize the gas circulation flow during the operation of the equipment.

[0047] The forming chamber cavity 101 is composed of a forming chamber bottom plate, a forming chamber left side plate, a forming chamber right side plate, a forming chamber front side plate, a forming chamber rear side plate, and a forming chamber top plate. Sealed chamber doors are installed on the forming chamber top plate, the forming chamber left side plate, the forming chamber front side plate, and the forming chamber rear side plate. Forming chamber observation windows and operating gloves are also installed on the forming chamber front side plate and the forming chamber rear side plate.

[0048] Both the left flying drive assembly 107 and the right flying drive assembly 102 are installed on the forming chamber bottom plate through a drive assembly support frame and are connected to the corresponding flying modules, so as to realize the left and right movement of the left and right flying modules in the forming chamber cavity 101.

[0049] The left flying assembly 105 and the right flying assembly 103 have the same structure, including a processing cavity 1031, a galvanometer module 1032, and a wind field structure. The galvanometer module 1032 is installed above the processing cavity 1031. The wind field structure includes an air inlet and an air outlet 1035, and the air inlet and the air outlet 1035 are respectively installed on the left and right sides of the processing cavity 1031. Two air inlets are provided, which are respectively located at the bottom and the middle of the processing cavity 1031. The air outlet 1035 is located at the bottom of the processing cavity 1031.

[0050] The processing cavity 1031 is composed of a cavity left plate, a cavity right plate, a cavity front plate, a cavity rear plate, and a cavity top plate. Cavity observation windows are respectively provided on the cavity front plate, the cavity left plate, and the cavity right plate. Air distribution pipelines are respectively arranged inside the air inlet and the air outlet 1035. The galvanometer module 1032 is arranged in an equidistant single row or double row by multiple groups of galvanometer structures.

[0051] The left flight drive assembly 107 and the right flight drive assembly 102 have the same structure, including a flight drive motor 1021, a coupling 1022, a ball screw 1024, a nut, a flight bearing block 1023 and a linear guide 1025; the flight drive motor 1021 is connected to the ball screw 1024 through the coupling 1022 to drive the ball screw 1024 to rotate. The two ends of the ball screw 1024 are installed on the drive assembly support frame through the flight bearing blocks 1023. The nut is installed on the ball screw 1024. The rotation of the ball screw 1024 drives the nut to move. The nut is connected to the support of the corresponding flight assembly. The linear guide 1025 is installed on the drive assembly support frame. The slider of the linear guide 1025 is connected to the support of the corresponding flight assembly, so that the flight assembly moves left and right under the double drive of the nut of the flight drive assembly and the slider of the linear guide 1025; the left flight drive assembly 107 and the right flight drive assembly 102 located on the front side share a pair of linear guides 1025, and the left flight drive assembly 107 and the right flight drive assembly 102 located on the rear side share a pair of linear guides 1025.

[0052] The powder dropping assembly 104 and the scraper assembly 106 are both installed on the top plate of the forming chamber. The powder dropping assembly 104 includes a powder dropping tank 1041, a powder dropping bin 1042 and a powder dropping shaft 1043 to achieve precise conveying of powder during the operation of the equipment. The powder dropping tank 1041 is installed above the powder dropping bin 1042. The powder outlet of the powder dropping tank 1041 is connected to the powder inlet of the powder dropping bin 1042. A powder dropping shaft 1043 for controlling the powder dropping amount is arranged in the powder dropping bin 1042. The powder outlet of the powder dropping bin 1042 is connected to the powder dropping port of the scraper assembly 106. The scraper assembly 106 is driven to move back and forth by linear drive modules 1061 located on the left and right sides of the printing area. The linear drive modules 1061 are embedded in the bottom plate of the forming chamber.

[0053] The gas circulation assembly includes a fan, a multi-stage filter element, a gas valve, etc., to realize the circulation of inert gas during the operation of the equipment and remove soot.

[0054] The forming cylinder assembly 20 includes a forming cylinder body 201, a vertical drive module 202, a double cantilever support 203, a piston assembly 204 and a forming cylinder bearing block 205; the vertical drive module 202 is installed on the left and right sides of the forming cylinder body 201 and at the bottom of the forming cylinder body 201. Each vertical drive module 202 is equipped with the double cantilever support 203. The double cantilever support 203 penetrates into the forming cylinder body 201 and is connected to the piston assembly 204. The motors of the double vertical drive modules 202 work to drive the double cantilever supports 203 on the left and right sides to push the piston assembly 204 in the forming cylinder body 201 to move up and down.

[0055] The lifting assembly 60 includes a lifting table 601, a lifting drive motor 603, and an up-and-down movement guide rail 602. The lifting table 601 is installed on the up-and-down movement guide rail 602 through a bracket. The lifting drive motor 603 and the up-and-down movement guide rail 602 are installed on the equipment support frame assembly 30. The lifting drive motor 603 drives the lifting table 601 to move up and down through a chain or a belt.

[0056] The forming cylinder horizontal movement assembly 40 includes a cylinder moving slide plate 405, a horizontal drive module 403, a base 401, a gear rack 404, and a horizontal linear guide rail 402. The cylinder moving slide plate 405 is installed on the base 401 through the horizontal linear guide rail 402. The horizontal drive module 403 is installed on the cylinder moving slide plate 405. The horizontal drive module 403 drives the cylinder moving slide plate 405 to drive the forming cylinder assembly 20 to move left and right through a speed reducer and the gear rack 404.

[0057] In the initial position, the piston assembly 204 (forming substrate) in the forming cylinder body 201 is at the uppermost position driven by the vertical drive module 202.

[0058] During operation, the right flying assembly 103 and the left flying assembly 105 are on both sides of the printing area. The powder feeding assembly 104 precisely conveys the powder into the doctor blade assembly 106. The doctor blade assembly 106 moves forward through the linear drive module 1061 to complete powder spreading. After powder spreading is completed, the movement and processing of the flying assembly can be carried out.

[0059] During processing, the right flying drive assembly 102 drives the right flying assembly 103 and the wind field structure and the galvanometer module 1032 installed on the right flying assembly 103 to move to the middle of the printing area together. The left flying drive assembly 107 drives the left flying assembly 105 and the wind field structure and the galvanometer module 1032 installed on the left flying assembly 105 to move synchronously to the left side of the printing area together. The two galvanometer modules 1032 start emitting light for melting and printing. During the printing process, the gas in the wind field structure enters the inside of the processing cavity 1031 from the upper air inlet 1033 and the lower air inlet 1034 on one side, and sucks out the soot and residue generated by laser-melted powder from the air outlet 1035 on the other side and enters the gas circulation assembly for filtration. As the right flying drive assembly 102 drives the right flying assembly 103 to move to the right side of the printing area, the left flying drive assembly 107 drives the left flying assembly 105 to gradually move to the middle of the printing area, and the galvanometer module 1032 stops emitting light for printing. Then the right flying assembly 103 continues to move away from the printing area, and the left flying assembly 105 returns and leaves the printing area. One layer of printing is completed.

[0060] The vertical drive module 202 in the forming cylinder assembly 20 operates to drive the piston assembly 204 (forming substrate) to descend to the position for the next layer of printing and then stops descending. The scraper assembly 106 moves backward to complete powder spreading again, pushes the excess powder to the powder collection port, and recovers it into the powder recycling device through the powder pipeline. The scraper assembly 106 then moves onto the powder dropping assembly 104, and the powder dropping assembly 104 supplies powder again to enter the printing of the next layer. This process repeats until the entire part is printed.

[0061] After the part printing is completed, the lifting assembly 60 ascends, and the forming cylinder assembly 20 is driven by the forming cylinder horizontal movement assembly 40 to move to the powder cleaning and part taking assembly 50 position. The vertical drive module 202 in the forming cylinder assembly 20 drives the piston assembly 204 (forming substrate) to ascend. During the ascending process, the switch of the powder suction device is turned on, and the operator inserts the hand into the powder cleaning and part taking assembly 50 through the operating glove 502 on the powder cleaning and part taking assembly 50, and sucks the powder into the powder recycling device through the powder suction pipe for part powder cleaning. After the powder is cleaned, the top plate 503 of the powder cleaning and part taking assembly 50 and the sealed bin door 501 of the powder cleaning and part taking assembly 50 are opened, and the part is lifted out by the overhead crane.

[0062] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention and are not intended to limit them; although the present invention has been described in detail with reference to the foregoing embodiments, those of ordinary skill in the art should understand that they can still modify the technical solutions described in the foregoing embodiments, or perform equivalent replacements on some or all of the technical features, and these modifications or replacements do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of the present invention.

Claims

1. A galvanometer flying type super-large selective laser melting (SLM) forming device, characterized in that: It includes a forming chamber assembly, a forming cylinder assembly, a forming cylinder horizontal movement assembly, a powder cleaning and part taking assembly, an equipment support frame assembly, a lifting assembly, and a control cabinet assembly; the forming chamber assembly is connected to the upper right of the equipment support frame assembly, the forming cylinder assembly is located below the forming chamber assembly, and the forming cylinder horizontal movement assembly is used to drive the forming cylinder assembly to move from the printing station to the powder cleaning and part taking station; the powder cleaning and part taking assembly is connected to the upper left of the equipment support frame assembly to realize the powder cleaning and part taking operation of the part after printing; the lifting assembly is located between the forming chamber assembly and the powder cleaning and part taking assembly, which can avoid the horizontal movement of the forming cylinder assembly after printing and provide an operating platform for the operator to clean the powder of the part; the control cabinet assembly is used to control each assembly during the operation of the equipment; The forming chamber assembly includes a forming chamber cavity, a left flying assembly, a left flying drive assembly, a right flying assembly, a right flying drive assembly, a powder dropping assembly, a scraper assembly, and a gas circulation assembly. The left flying drive assembly and the right flying drive assembly are arranged on the front side and the rear side of the forming chamber cavity respectively. The left flying assembly is driven by the left flying drive assembly, and the right flying assembly is driven by the right flying drive assembly, so that the left flying assembly and the right flying assembly move left and right in the forming chamber cavity to half of the printing area for part printing respectively; the powder dropping assembly and the scraper assembly are both located at the rear side of the forming chamber cavity. The powder dropping assembly is used to supply powder to the scraper assembly, and the scraper assembly moves back and forth for powder spreading before printing; the gas circulation assembly is connected to the forming chamber cavity through the inlet and outlet gas pipelines to realize the gas circulation flow during the operation of the equipment; The forming cylinder assembly includes a forming cylinder body, a double vertical drive module, a double cantilever support, a piston assembly, and a bearing seat; the vertical drive module is installed on the left and right sides of the forming cylinder body and at the bottom of the forming cylinder body. Each vertical drive module is equipped with the double cantilever support. The double cantilever support penetrates into the forming cylinder body and is connected to the piston assembly. The motors of the double vertical drive module work to drive the double cantilever supports on the left and right sides to push the piston assembly in the forming cylinder body to move up and down.

2. The galvanometer flying type ultra-large selective laser melting SLM forming equipment according to claim 1, wherein The left flying assembly and the right flying assembly have the same structure, including a processing cavity, a galvanometer module, and a wind field structure; the galvanometer module is installed above the processing cavity, and the wind field structure includes an air inlet and an air outlet. The air inlet and the air outlet are installed on the left and right sides of the processing cavity respectively; there are two air inlets, which are located at the bottom and the middle of the processing cavity respectively; the air outlet is located at the bottom of the processing cavity.

3. The galvanometer flying type super-large selective laser melting SLM forming equipment according to claim 2, characterized in that, The processing cavity is composed of a cavity left plate, a cavity right plate, a cavity front plate, a cavity rear plate, and a cavity top plate; cavity observation windows are respectively arranged on the cavity front plate, the cavity left plate, and the cavity right plate.

4. The galvanometer flying type super-large selective laser melting SLM forming equipment according to claim 2, characterized in that, Uniform air pipelines are respectively arranged inside the air inlet and the air outlet; the galvanometer module is arranged in a single row or a double row at equal distances by multiple groups of galvanometer structures.

5. The galvanometer flying type extra-large selective laser melting SLM forming equipment according to claim 1, characterized in that, The forming chamber cavity is composed of a forming chamber bottom plate, a forming chamber left side plate, a forming chamber right side plate, a forming chamber front side plate, a forming chamber rear side plate and a forming chamber top plate; both the left flight drive assembly and the right flight drive assembly are installed on the forming chamber bottom plate through a drive assembly support frame and are connected to the corresponding flight modules, realizing the left and right movement of the left and right flight modules in the forming chamber cavity; both the powder dropping assembly and the scraper assembly are installed on the forming chamber top plate.

6. The galvanometer flying ultra-large selective laser melting (SLM) forming equipment according to claim 1 or 5, characterized in that, The left flight drive assembly and the right flight drive assembly have the same structure, including a flight drive motor, a coupling, a ball screw, a nut, a flight bearing block and a linear guide rail; the drive motor is connected to the ball screw through the coupling to drive the ball screw to rotate. The two ends of the ball screw are installed on the drive assembly support frame through the flight bearing blocks. The nut is installed on the ball screw. The rotation of the ball screw drives the nut to move. The nut is connected to the support of the corresponding flight assembly. The linear guide rail is installed on the drive assembly support frame, and the linear guide rail slider is connected to the support of the corresponding flight assembly, enabling the flight assembly to move left and right under the double drive of the nut of the flight drive assembly and the linear guide rail slider. The left flight drive assemblies and the right flight drive assemblies located on the front side share a pair of linear guide rails, and the left flight drive assemblies and the right flight drive assemblies located on the rear side share a pair of linear guide rails.

7. The galvanometer flying type super-large selective laser melting SLM forming equipment according to claim 1 or 5, characterized in that, The powder dropping assembly includes a powder dropping tank, a powder dropping bin and a powder dropping shaft. The powder dropping tank is installed above the powder dropping bin. The powder outlet of the powder dropping tank is connected to the powder inlet of the powder dropping bin. A powder dropping shaft for controlling the powder dropping amount is arranged in the powder dropping bin. The powder outlet of the powder dropping bin is connected to the powder dropping port of the scraper assembly. The scraper assembly is driven to move back and forth by linear drive modules located on the left and right sides of the printing area. The linear drive modules are embedded in the forming chamber bottom plate.

8. The galvanometer flying type super-large selective laser melting SLM forming equipment according to claim 5, characterized in that, Sealed chamber doors are installed on the forming chamber top plate, the forming chamber left side plate, the forming chamber front side plate and the forming chamber rear side plate. Forming chamber observation windows and operating gloves are also installed on the forming chamber front side plate and the forming chamber rear side plate.

9. The galvanometer flying type ultra-large selective laser melting SLM forming equipment according to claim 1, characterized in that, The lifting assembly includes a lifting table, a lifting drive motor and an up-and-down movement guide rail; the lifting table is installed on the up-and-down movement guide rail through a bracket. The lifting drive motor and the up-and-down movement guide rail are installed on the equipment support frame assembly. The lifting drive motor drives the lifting table to move up and down through a chain or a belt.

10. The galvanometer flying type super-large selective laser melting SLM forming equipment according to claim 1, characterized in that, The forming cylinder horizontal movement assembly includes a cylinder moving slide plate, a horizontal drive module, a base, a gear rack and a horizontal linear guide rail. The cylinder moving slide plate is installed on the base through the linear guide rail. The horizontal drive module is installed on the cylinder moving slide plate. The horizontal drive module drives the cylinder moving slide plate to drive the forming cylinder assembly to move left and right through a speed reducer and a gear rack.

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